CN113464125B

CN113464125B - Wireless communication oil extraction device and wireless communication method

Info

Publication number: CN113464125B
Application number: CN202110867662.9A
Authority: CN
Inventors: 黄鹏; 梁琦; 郑海渊; 董凯; 刘小旺; 王海涛; 高虎; 杨帆
Original assignee: Hebei Zhongqing Yongsheng Petroleum Technology Co ltd
Current assignee: Hebei Zhongqing Yongsheng Petroleum Technology Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2023-03-21
Anticipated expiration: 2041-07-29
Also published as: CN113464125A

Abstract

The invention relates to a wireless communication oil extraction device, comprising: the pump body is used for lifting the underground fluid to the ground and is connected with the oil pumping equipment through the rod body; a communication module located inside the pump body and configured to: and modulating information into the load fluctuation of the oil pumping equipment in a mode of controlling the communication/blockage between the inside and the outside of the pump body so as to change the acting force applied to the rod body by the pump body. The invention modulates the information into the acting force of the pump body on the rod body, does not adopt electromagnetic waves or sound waves as carriers of the information, and can avoid the defects of great transmission attenuation and interference of the electromagnetic waves/sound waves in the underground.

Description

Wireless communication oil extraction device and wireless communication method

Technical Field

The invention relates to the technical field of oil and gas field exploitation, in particular to a wireless communication oil or gas production device and a wireless communication method, and further relates to an oil pump body or an air pump body for wirelessly uploading underground data.

Background

Because domestic oil fields generally have the characteristics of multilayer and heterogeneity, in order to ensure that the oil fields can be fully exploited, data monitoring under the oil production well is very important. With the continuous application and development of the automatic oil extraction technology, the detection of the domestic oil extraction technology realizes the monitoring of downhole parameters. And the normal oil extraction of the underground equipment of the oil field can be ensured.

The existing automatic oil extraction technology mainly adopts a preset cable to supply power for underground communication equipment and transmits ground and underground measurement and control signals, and the existing cable digital detection technology needs to be constructed by binding the cable outside an oil pipe, so that the problems of complex site construction operation, low construction efficiency, high difficulty in operation under pressure and the like exist. When the cableless digital transmission process needs to log historical data or adjust parameters, a logging truck must be used, and a traditional method is used for lowering cables and instruments to finish operation.

The wireless underground working condition and parameter monitoring at the present stage generally adopts two independent steps, firstly, working conditions and related parameters of underground equipment are collected through a sensor or a data acquisition terminal, and the working conditions and the parameters are transmitted to a wireless communication module; then, the wireless communication module transmits the working conditions and parameters to surface equipment by taking the electromagnetic waves/sound waves as carriers and taking the underground environment (underground fluid, stratum and underground gas) as a transmission medium of the electromagnetic waves/sound waves. For example, chinese patent publication No. CN2869822Y discloses a wireless communication measuring device for torque, rotation speed and axial force of a polished rod of a screw pump well, which comprises a sensor, a signal transmitting system and a host. The sensor is used for collecting axial force parameters and torque parameters, analog signals collected by the sensor are input into the wireless communication module after being amplified and subjected to analog-to-digital conversion, and then radio waves are emitted through the signal emitting system, so that wireless transmission is achieved. For example, chinese patent document No. CN112682028a discloses a device and a method for real-time testing and wireless transmission of a pumping well sucker-rod pump diagram, the device includes a battery pack, a magnetoacoustic transducer, a system power supply, a displacement sensor, a circuit board, a load sensor, a housing and a ground controller, wherein the displacement sensor and the load sensor are used for sensing displacement and load parameters of the sucker-rod pump, and then signals of the displacement and load parameters are transmitted to the magnetoacoustic transducer through the circuit, and the displacement and load parameters are converted into acoustic signals, wherein the acoustic signals are coupled to a sucker rod and transmitted to the ground through the sucker rod, that is, the acoustic signals realize wireless communication by using the sucker rod as a transmission medium. For example, chinese patent publication No. CN107795304B discloses a multi-layer simultaneous production string and a method of using the same. The pipe column comprises a plurality of connecting oil pipes, an upper oil extraction pipe section, a lower oil extraction pipe section and a shaft bottom pipe section which are sequentially connected and conducted through the connecting oil pipes from top to bottom, a signal receiving device, a signal transmitting device, an upper oil layer multi-parameter tester and a lower oil layer multi-parameter tester. The upper oil extraction pipe section comprises an upper pump of a separate production pump and an eccentric oil inlet valve, the upper pump of the separate production pump is connected to the sucker rod, and the lower oil extraction pipe section comprises a lower pump of the separate production pump, a fixed valve of the separate production pump, a cable passing packer, a one-way valve and a sieve pipe, wherein the lower pump of the separate production pump is connected with the upper pump of the separate production pump through a connecting rod. The signal transmitting device is located at the upper stream of an upper pump of the separate production pump, the upper oil layer multi-parameter tester is located between the eccentric oil inlet valve and a lower pump of the separate production pump, the lower oil layer multi-parameter tester is located between the cable packer and the one-way valve, and the signal receiving device is hung in the air of the oil sleeve ring and is in wireless connection with the signal transmitting device.

However, because the downhole casing contains mud, scale, oil, water and bubbles, the fluid in the wellbore is in a non-uniform state in most cases, and due to factors such as the formation, the drill string and the oil layer, the transmission of information in the form of electromagnetic waves or acoustic waves has the defects of poor reliability, short transmission distance, difficult maintenance and replacement, and the like.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

In view of the deficiencies of the prior art, the present invention provides a wireless communication oil extraction device, comprising:

the pump body is used for lifting the underground fluid to the ground and is connected with the oil pumping equipment through the rod body;

a communication module located inside the pump body and configured to:

and modulating information into the load fluctuation of the oil pumping equipment in a mode of controlling the communication/blockage between the inside and the outside of the pump body so as to change the acting force applied to the rod body by the pump body. At present, regarding monitoring of working conditions and downhole parameters of downhole oil production equipment, the working conditions and parameters are usually modulated into electromagnetic waves/acoustic waves as carriers of information, and the electromagnetic waves/acoustic waves are transmitted to the ground through transmission media such as downhole fluid, casings, oil pipes and rod bodies. However, on one hand, due to the fact that the underground medium components are more, the characteristics of the stratum and the oil layer are distributed in a complex manner and are not uniform, and in addition, due to the severe high-temperature and high-pressure environment in the underground, the attenuation and interference of electromagnetic waves/sound waves are large when the electromagnetic waves/sound waves are transmitted in the underground, signals are very weak when the signals are transmitted to the ground or the underground, and the ground background noise and the underground high-frequency/low-frequency interference cause great difficulty in accurate extraction of the signals, and even if the ultralow-frequency electromagnetic waves are used for communication, the noise is difficult to filter. The invention integrates the two steps of monitoring the working condition and uploading the information, namely, the information is transmitted through the change of the working condition. The working condition of the underground equipment is used as a carrier for information transmission, and after the working condition is monitored, the acting force applied to the rod body by the oil extraction devices such as the pump body and the like is actively changed, so that the power of the oil pumping equipment on the ground is changed, or the load of the suspension point of the rod body is changed, and the underground uploaded information can be acquired by monitoring the power of the oil pumping equipment or the load of the suspension point of the rod body on one side of the ground. The invention modulates the information into the acting force of the pump body on the rod body, does not adopt electromagnetic waves or sound waves as carriers of the information, and can avoid the defects of great transmission attenuation and interference of the electromagnetic waves/sound waves in the underground.

The present invention also provides a wireless communication oil extraction device, comprising:

the pump body is arranged underground and is connected with the oil pumping equipment through the rod body;

and the communication module is arranged in the pump body and comprises a resistance piece directly or indirectly connected with the rod body. Preferably, the communication module is configured to control the resistance element to change the acting force applied to the rod body during movement so as to transmit information/data in a manner of changing the load of the oil pumping equipment.

the pump body reciprocates along with the rod body under the driving of the oil pumping equipment;

and the communication module is arranged in the pump body and comprises a power generation unit directly or indirectly connected with the rod body. Preferably, the reciprocating motion of the rod body can drive the inner rotor of the power generation unit to rotate to generate electric energy. The communication module is configured to determine or identify a motion state of the rod body based on the power generation unit. Or the communication module is configured to transmit information/data in a mode that the acting force borne by the rod body during movement is changed through the power generation unit so that the load of the oil pumping equipment is changed.

According to a preferred embodiment, the pump body is housed in a casing downhole. One side of the pump body connecting rod body is connected with the oil pipe. Or the pump body is sleeved in an oil pipe, and the oil pipe is sleeved in the sleeve. An annular space is formed between the sleeve and the oil pipe, and an oil drainage port communicated with the annular space is formed in the pump body.

According to a preferred embodiment, the pump body comprises a pump barrel, a first valve and a second valve. One side of the pump barrel is connected with the rod body, and the first valve is arranged on the other side of the pump barrel. An oil outlet chamber is formed between the first valve and the second valve. The communication module is arranged in the oil outlet chamber and communicated with the oil drainage port.

According to a preferred embodiment, the valve body is arranged at the oil drainage port and/or the communication part of the communication module and the oil outlet chamber.

According to a preferred embodiment, the communication module comprises a processing unit and a motor. The processing unit is configured to modulate information in fluctuation of suspension point load of the rod body or power fluctuation of the oil pumping equipment in a mode that the opening of the valve body can be adjusted by the driving motor so as to change acting force of the pump body on the rod body.

According to a preferred embodiment, the communication module comprises a power generating unit. And a pump barrel driven by the rod body in the pump body is connected with a lead screw capable of entering the power generation unit. Or the part of the rod body penetrating through the pump barrel is connected with a lead screw capable of entering the power generation unit. And under the condition that the lead screw moves along the first direction/the second direction, the rotor of the power generation unit is arranged in a mode of rotating around the axis of the rotor under the driving of the lead screw.

According to a preferred embodiment, the communication module is configured to perform the following steps:

acquiring monitoring data;

encoding the monitoring data according to a preset encoding mode;

the valve body is controlled to open/close based on the coded command. Or the power generation unit is controlled to increase the load based on the coded instruction so as to change the acting force borne by the rod body during movement.

The invention also provides a wireless communication method for uploading downhole data to the surface, comprising the following steps:

and the acting force borne by the rod body during the movement is changed so as to transmit information or data in a mode of changing the load of the oil pumping equipment.

Drawings

FIG. 1 is a schematic diagram of a preferred application scenario of the present invention;

FIG. 2 is a schematic structural view of a preferred embodiment of the present invention;

FIG. 3 is a block diagram of a preferred embodiment of a communications module of the present invention;

fig. 4 is a schematic structural diagram of a preferred embodiment of a communication module of the present invention;

FIG. 5 is a schematic structural view of a preferred embodiment of the power generation unit of the present invention connected to a lead screw;

FIG. 6 is a schematic diagram of a power waveform under normal operating conditions of the pumping unit of the present invention;

FIG. 7 is a power waveform of an oil well pumping apparatus with a communication module of the present invention transmitting information through a valve body;

fig. 8 is a power waveform diagram of a hand-operated device in the case of a communication module of the present invention transmitting information through a power generating unit or a resistance element.

List of reference numerals

100: the ground surface 200: 300, underground: oil layer

400: the oil pumping device 500: the sleeve 600: oil pipe

201: an upper joint 202: circuit outer cylinder 203: threading rod

204: circuit isolation cartridge 205: the intermediate joint 206: battery inner barrel

207: stator 208: generator housing 209: lower joint

210: first bearing outer ring 211: second bearing outer ring 212: rotor

213: bearing joint 214: groove 215: convex body

216: control valve assembly 410: the control module 420: rod body

421: the screw 510: an annular space 10: pump body

20: the communication module 11: first valve 12: the second valve

13: the pump barrel 14: oil outlet chamber 15: oil drain port

21: the processing unit 22: the power generation unit 23: sensing unit

24: valve body 25: the motor 26: drive unit

27: first tube 28: second pipe 29: built-in battery

Detailed Description

The following detailed description is made with reference to the accompanying drawings.

Example 1

The invention aims to realize reliable and stable wireless uploading of downhole data of an oil production well in the petroleum industry, so that downhole working conditions and parameters can be obtained efficiently and at low cost.

The invention provides a wireless communication oil extraction device, and also relates to an oil well pump body for wirelessly uploading underground data. One or more features of any of the embodiments described below may be combined with one or more features of any of the other embodiments without causing any conflict or conflict, and repeated details are not described herein.

It should be noted that the present invention relates to the transmission of information. The information involved in the present invention may be downhole conditions and parameters. In the present invention, the entity of information transmission is data, that is, the data is the entity carrying information and is embodied as a series of meaningful symbol sequences. The data transmission mode can be serial transmission or parallel transmission. The signals referred to in the present invention are electrical/electromagnetic representations of data, which are the forms of existence of data during transmission. The signal may be an analog signal (continuous signal) or a digital signal (discrete signal). For example, the present invention may obtain information such as downhole conditions and parameters through the sensing unit 23. The downhole conditions and parameters may be transmitted to the processing unit 21 in the form of analog signals. The processing unit 21 processes the acquired downhole conditions and parameters to form data, and transmits the data in a digital signal mode.

Preferably, the modulation is a variation of one or several parameters of the carrier in accordance with the information to be transmitted. For example, the communication module 20 of the present invention may be configured to load/modulate information into the load of the pumping unit 400 by changing the force experienced by the rod 420 and/or the plunger/barrel 13/rod within the pump body 10 such that the load of the pumping unit 400 changes. The control module 410 can change the movement state of the rod 420 and/or the plunger/barrel 13/rod inside the pump body 10 according to the information to be transmitted. The communication module 20 can change the force applied to the rod body 420 and/or the plunger/barrel 13/rod body within the pump body 10 or change the load on the oil well pumping apparatus 400 according to the information to be transmitted.

The wireless communication oil or gas production device provided by the invention comprises a pump body 10 and a communication module 20. The communication module 20 is disposed within the pump body 10. The wireless communication oil extraction device provided by the invention is applied to oil extraction or gas extraction. The gas may be natural gas or coal bed gas. This example illustrates an embodiment of the present invention by taking oil recovery as an example. The oil pumping device 400 according to this embodiment may also be an air pumping device, and the pump body 420 may be used for pumping oil or pumping air. The production well may be replaced with a gas production well.

Referring to fig. 1, the wireless communication oil production device is disposed under an oil production well. Specifically, the surface 100 is provided with an oil pumping apparatus 400 and a control module 410. The downhole 20 is provided with a casing 500, tubing 600, a rod body 420 and a wireless communication production unit of the present invention. The control module 410 is used to control the motion state of the pumping unit 400. The control module 410 may also monitor changes in power to the oil well pumping apparatus 400. The pumping apparatus 400 may be a pumping unit, such as a beam pumping unit or a walking beam-less pumping unit. The beamless pumping unit can be a chain type pumping unit, a steel rope pumping unit, a hydraulic type pumping unit, a crank connecting rod type pumping unit and the like. Preferably, the oil well pumping device 400 can be replaced with a suction device. The air extraction device may be a walking beam air extractor or a walking beam-less air extractor. Preferably, the oil pumping apparatus 400 is driven by a work-producing device, such as a lift motor. Tubing 600 and a wireless communication production unit are disposed within casing 500. The rod body 420 is sleeved in the oil pipe 600. The oil pipe 600 is connected to the pump body 10. The rod body 420 is connected to the pump body 10. Preferably, the rod body 420 may be a rigid elongated body, such as a sucker rod. Rod 420 may also be a flexible elongated body such as a wire rope or chain. Preferably, the sleeve 500 is hollow. One end of the casing 500 is near the surface and the other end is at the bottom of the well. The sleeve 500 may be a cylinder or a polygonal cylinder. The oil pipe 600 is hollow. The radial cross-section of the oil pipe 600 may be circular or polygonal. Preferably, the pump body 10 may also be sleeved in the oil pipe 600. The end of the oil pipe 600 on the side away from the ground is blocked by the pump body 10. The pump body 320 may be a rod pump or a tube pump.

Preferably, the oil well pumping apparatus 400 is used to pull or push the rod body 420 in a first direction or a second direction. The first direction is toward the ground 100 side. The second direction is toward the bottom hole side of the well 200. Preferably, the oil well pumping apparatus 400 pulls or pushes components inside the pump body 10 in a first direction or a second direction via the rod body 420. More specifically, the oil well pumping apparatus 400 is coupled to the rod body 420. The rod body 420 is connected to the pump body 10. Preferably, the pumping unit 400 moves the rod body 420 in a first direction or a second direction. Preferably, the pumping unit 400 drives the rod body 420 to move in the first direction to an upstroke movement state. The pumping unit 400 drives the rod 420 to move in the second direction to a down stroke movement state. Preferably, when the pumping unit 400 stops, the rod 420 stops, and is in a stopped motion.

Preferably, the pump body 10 comprises a first valve 11, a second valve 12 and a pump barrel 13, see fig. 2. Preferably, the pump barrel 13 may be a plunger. The first valve 11 and the second valve 12 may be valve bodies, such as check valves. Also for example, the first valve 11 may be a traveling valve and the second valve 12 may be a fixed valve. The pump barrel 13 is provided with a first valve 11 facing the second direction side. Or the bottom of the pump barrel 13 is provided with a first valve 11. The lever body 420 is connected with the pump barrel 13. The pump barrel 13 is movable with the lever 420 in a first direction or a second direction. Specifically, if the pressure on the first direction side of the first valve 11/the second valve 12 is smaller than the pressure on the second direction side of the first valve 11/the second valve 12, the first valve 11/the second valve 12 is opened and the fluid can pass through the first valve 11/the second valve 12. If the pressure of the first direction side of the first valve 11/the second valve 12 is greater than the pressure of the second direction side of the first valve 11/the second valve 12, the first valve 11/the second valve 12 is closed, and the fluid cannot pass through the first valve 11/the second valve. With this arrangement, the pump barrel 13 moving in the first and second directions can periodically open or close the first and second valves, thereby lifting the fluid in the oil layer 300 to the surface 100.

Preferably, the lever body 420 may be connected to the pump barrel 13 only, and may not extend into the communication module 20 or between the first valve 11 and the second valve 12. The rod body 420 can on the other hand extend through the pump barrel 13 and between the first valve 11 and the second valve 12. Or the rod 420 may extend through the pump barrel 13 into the communication module 20. Preferably, the lever body 420 is also connected to one side of the pump barrel 13. The other side of the pump barrel 13 opposite to the rod body 420 is provided with a pump rod. The pump rod extends between the first valve 11 and the second valve 12. The pump rod can be moved in a first direction or a second direction by the pump barrel 13.

Preferably, the pumping unit 400 moves the pump barrel 13 or the pump rod in the pump body 10 periodically in the first direction or the second direction. Preferably, the pumping unit 400 moves the rod body 420 along the axis/axial direction of the casing 500/tubing 600. Preferably, the pumping unit 400 drives the rod body 420 to move periodically in the first direction or the second direction. The pumping unit 400 drives the rod body 420 to move up and down periodically along the axis of the casing 500/tubing 600. Preferably, rod body 420 is moved along the axial/axial direction of casing 500/tubing 600 by pumping unit 400. Preferably, the rod body 420 is moved along the axial/axial direction of the rod body 420 by the pumping unit 400. Preferably, the pump barrel 13 or pump rod in the pump body 10 moves along the axial direction/axis of the rod body 420 under the driving of the rod body 420. The barrel 13 or pump rod in the pump body 10 moves along the axis/axial direction of the casing 500/oil pipe 600 under the driving of the rod body 420. The pump barrel 13 or the pump rod in the pump body 10 is driven by the rod body 420 to move along a first direction or a second direction. The pump barrel 13 or the pump rod in the pump body 10 is periodically moved in the first direction or the second direction by the rod body 420.

Preferably, the pump body 10 is used to lift crude oil within the reservoir 300 to the surface. The communication module 20 is used to upload the operating conditions and parameters of the downhole equipment to the surface 100. Preferably, the communication module 20 uploads downhole conditions and parameters to the control module 410.

Preferably, the pump body 10 and a portion of the rod body 420 are disposed downhole 200. The pump barrel 13 or the pump rod in the pump body 10 moves along the rod body 420 in the first direction or the second direction under the driving of the oil pumping device 400. Either the barrel 13 or the pump rod in the pump body 10 moves with the rod body 420 toward the ground 100 side or toward the bottom hole side under the driving of the pumping unit 400. The pump body 10 of the present invention preferably operates on the same principle as a tube/rod pump.

Preferably, the communication module 20 is configured to modulate information/data into changes in the load of the oil pumping apparatus 400 based on controlling the communication/blocking of the interior of the pump body 10 with the exterior to change the force applied to the rod body 420 by the pump body 10. Preferably, the communication module 20 is configured to transmit information/data in such a way as to vary the force to which the rod 420 is subjected, based on controlling whether the interior of the pump body 10 is in communication with the exterior. Preferably, the communication module 20 can control the communication/blocking of the interior of the pump body 10 with the outside through the valve body 24 or by moving itself. Specifically, the pump barrel 13 in the pump body 10 can lift the fluid in the oil layer 300 to the ground 100 in case of moving in the first direction or the second direction. When the communication module 20 is configured to close the communication between the inside of the pump body 10 and the outside, the pump body 10 as a closed whole exerts on the rod 420 its own weight and the weight of the fluid it contains. When the communication module 20 is configured to open the communication between the inside and the outside of the pump body 10, the pump body 10 is communicated with the outside, and the acting force applied to the rod body 420 is converted into a pressure difference between the inside and the outside of the pump body 10, so that the acting force applied to the rod body 420 is increased, and the load of the oil pumping device 400 is increased. The increased load on the pumping unit 400 causes a load at the point where it is attached to the rod body 420 or causes the pumping unit 400 to increase in power.

Preferably, in the event that the wand 420 or pump wand enters the communication module 20, the communication module 20 is configured to transmit information/data in a manner that increases or decreases the resistance to movement of the wand 420 or pump wand. Preferably, in the event that the rod body 420 or pump rod enters the communication module 20, the communication module 20 is configured to modulate information/data into one of the loads of the pumping unit 400 based on the manner in which the resistance changes as the rod body 420 or pump rod moves such that the load of the pumping unit 400 changes. Specifically, an element contacting the rod body 420 or the pump rod may be disposed in the communication module 20, and the element may block the reciprocating motion of the rod body 420 or the pump rod, so as to cause the normal load fluctuation when the driving rod body 420 of the oil pumping device 400 moves, and therefore, the information or data sent by the communication module 20 can be analyzed by monitoring the load waveform of the oil pumping device 400.

Preferably, the above configuration of the communication module 20 may be a configuration of the processing unit 21 within the communication module 20.

Through the above setting mode of the communication module 20 or the processing unit 21 for transmitting information/data, the following beneficial effects are achieved:

at present, regarding monitoring of working conditions and downhole parameters of the oil production downhole equipment, the working conditions and parameters are usually modulated on electromagnetic waves/acoustic waves as carriers of information, and the electromagnetic waves/acoustic waves are transmitted to the ground through transmission media such as downhole fluid, the casing 500, the oil pipe 600, the rod body 420 and the like. However, on one hand, due to the fact that the underground medium components are more, the characteristic distribution of the stratum and the oil layer is complex, and uneven conditions exist, and in addition, due to the severe high-temperature and high-pressure environment of the underground, the attenuation and interference of electromagnetic waves/sound waves are large when the underground transmission is carried out, signals are very weak when the signals are transmitted to the ground or the underground, and the ground background noise and the underground high-frequency/low-frequency interference cause great difficulty in accurate extraction of the signals, and even if the ultra-low-frequency electromagnetic waves are adopted for communication, the noise is difficult to filter. The invention integrates the two steps of monitoring the working condition and uploading the information, namely, the information is transmitted through the change of the working condition. The working condition of the downhole equipment is used as a carrier for information transmission, and after the working condition is monitored, the acting force applied to the rod body 420 is actively changed, so that the load of the pumping equipment 400 on the ground 100 is changed, and the downhole uploaded information can be acquired by monitoring the power of the pumping equipment 400 or the load of a suspension point of the pumping equipment 400 on one side of the ground. According to the invention, information is modulated in a mode of acting force on the rod body 420, on one hand, electromagnetic waves or sound waves are not adopted as carriers of the information, and the defects of great transmission attenuation and interference of the electromagnetic waves/sound waves in the underground can be avoided; on the other hand, the modulation and demodulation scheme of the invention is simple, information can be modulated on the load of the oil pumping equipment 400 only by communicating or blocking the inside and the outside of the pump body 10 or changing the resistance when the oil pumping equipment is in contact with the rod body 420 or the pump rod, and the information uploaded underground can be demodulated according to the curve of power fluctuation or load fluctuation only by directly reading the load change of the oil pumping equipment 400 or the change of the suspension point load of the oil pumping equipment 400 when the ground equipment receives the information, for example, the information uploaded underground can be acquired according to the amplitude, the cycle length, the middle pause duration and other information of the fluctuation curve, so that the cost is reduced on the basis of improving the reliability and the stability of information transmission. Moreover, the oil extraction device provided by the invention is also beneficial to large-scale deployment, has high compatibility with oil extraction equipment at the present stage, and basically adopts oil extraction equipment such as an oil pumping unit, an oil pumping rod, a pump body and the like in an oil field oil extraction application scene, and the monitoring of the power of the oil pumping unit is a conventional means in the field, so the oil extraction device provided by the invention can directly replace an oil well pump. In addition, compared with the wireless communication technologies such as Zigbee, bluetooth and radio frequency adopted at the present stage, the attenuation is serious under the underground working condition, and the long-distance transmission cannot be realized. The invention can realize remote communication from the underground to the ground. The distance of communication is determined by the depth of the well, and theoretically, the distance of communication is not limited, and communication with the ground can be realized at least in the well with the distance of more than 1000m in the embodiment.

Preferably, in the case where the rod body 420 is connected only with the pump barrel 13 and does not extend into the communication module 20 or between the first valve 11 and the second valve 12, the communication module 20 may be configured to transmit information or data by controlling whether the inside of the pump body 10 is communicated with the outside. Preferably, the communication module 20 can control the communication and the blocking of the inside and the outside of the pump body 10 by providing the valve body 24.

Referring again to fig. 2, a space formed between the first valve 11 and the second valve 12 is an oil outlet chamber 14. The communication module 20 is sleeved in the pump body 10. Preferably, the communication module 20 is disposed between the second valve 11 and the second valve 12. The communication module 20 is disposed in the oil outlet chamber 14. The communication module 20 includes a housing. The housing may be substantially cylindrical. The radial cross-section of the housing may be circular or polygonal. Preferably, the radial section of the housing may be the same as or different from the radial section of the pump body 10. Preferably, the housing is fixed within the pump body 10. The housing is fixed in the oil outlet chamber 14. The housing and the inner wall of the pump body 10 may abut against each other. It should be noted that the inner wall of the pump body 10 referred to herein may be the inner wall of the oil pipe 600, since the pump body 10 is disposed in the oil pipe 600. At least part of the side wall of the housing is connected to the inner wall of the pump body 10. The lever body 420 is connected with the pump barrel 13. Specifically, the lever 420 may move the pump barrel 13 in a first direction or a second direction.

Preferably, in case the lever 420 moves in the first direction, or in case of an upstroke on the lever 420, the pump barrel 13 moves with the lever 420 in the first direction. In the case of a movement of the pump barrel 13 in the first direction, the first valve 11 is closed. The first valve is closed due to the dead weight of the first valve 11 and the pressure in the pump barrel 13. In the case of a movement of the pump barrel 13 in the first direction, the second valve 12 opens. Since the first valve 11 is closed, the pressure of the outlet oil chamber 14 is reduced, resulting in the pressure of the outlet oil chamber 14 being smaller than the pressure of the fluid on the second direction side of the second valve 12, and thus the second valve 12 is opened. With the second valve 12 open, fluid in the reservoir 300 can pass from the annulus 510 into the oil outlet chamber 14. Annulus 510 is the space between casing 500 and tubing 600. It should be noted that the communication module 20 is provided with a passage through which fluid passes, so that two spaces of the oil outlet chamber 14 partitioned by the communication module 20 are communicated. In addition, the communication module 20 may not be provided with the channel. Since the communication module 20 may not entirely fill the cross section of the oil outlet chamber 14, a gap is present between the communication module 20 and the oil outlet chamber 14, through which fluid in the oil outlet chamber 14 can flow.

Preferably, in case lever 420 is moved in the second direction, or in case lever 420 is downstroke, pump barrel 13 is moved with lever 420 in the second direction. In the case of a movement of the pump barrel 13 in the second direction, the second valve 12 is closed and the first valve 11 is opened. The pump barrel 13 moves in the second direction under the action of the rod body 420, and further compresses the fluid in the oil outlet chamber 14, and further, when the pressure of the oil outlet chamber 14 is greater than the pressure of the second direction side of the second valve 12, the second valve 12 is closed. I.e. in case the pump barrel 13 is moved in the second direction, the second valve 12 is closed. When the second valve 12 is closed, the pressure of the oil outlet chamber 14 continues to increase. When the pressure in the oil outlet chamber 14 is greater than the pressure in the pump barrel 13, the first valve 11 opens. When the first valve 11 is opened, the fluid in the oil outlet chamber 14 enters the pump barrel 13 and is discharged along the oil pipe 600, so as to lift the fluid in the pump barrel 13 to the ground 100, and the load of the oil pumping device 400 or the acting force of the oil pumping device 400 is the gravity force borne by the rod body 420, which is the self weight of the pump body 10 and the sucked fluid.

Preferably, the load of the pumping unit 400 is the force experienced by the rod body 420. In the case of blocking/isolating the interior of the pump body 10 from the outside, or in the case of blocking/isolating the interior of the pump body 10 from the annulus 510, the load of the pumping unit 400 is the self weight of the pump body 10 and the fluid being pumped. The force experienced by the pumping unit 400 may be the deadweight of the rod 420 and pump body 10. The self weight of the pump body 10 here also includes the weight of the fluid in the pump body 10.

Preferably, in the case that the inside of the pump body 10 is communicated with the outside, or the inside of the pump body 10 is communicated with the annulus 510, the load of the oil pumping device 400 is the pressure difference between the pump barrel 13 and the outside of the pump body 10, or the load of the oil pumping device 400 is the pressure difference between the pump barrel 13 and the annulus 510. Specifically, under the condition that the pump barrel 13 moves along the second direction, the pressure of the oil outlet chamber 14 continuously increases, if the inside of the pump body 10 is communicated with the outside, or the pump body 10 is communicated with the annulus 510, or the oil outlet chamber 13 is communicated with the annulus 510, the fluid in the oil outlet chamber 14 flows back to the annulus 510, so that the pressure in the oil outlet chamber 14 decreases, the first valve 11 cannot be opened, the fluid in the oil outlet chamber 14 cannot enter the pump barrel 13, and at this time, the load of the oil pumping device 400 is the pressure difference between the pump barrel 13 and the outside of the pump body 10, or the load of the oil pumping device 400 is the pressure difference between the pump barrel 13 and the annulus 510. Through this setting mode, the beneficial effect who reaches is:

under the condition that the inside of the pump body 10 is blocked/isolated from the outside, the pump barrel 13 of the pump body 10 is driven by the oil pumping device 400 to move along the first direction and the second direction, so as to lift the crude oil in the oil layer 300 to the ground, at this time, the load of the oil pumping device 400 can be simplified to the gravity borne by the rod body 420, specifically, the gravity of the pump body 10 and the sucked fluid. Under the condition that the inside of the pump body 10 is communicated with the outside, the pump barrel 13 moves along the second direction, and as the oil outlet chamber 14 is communicated with the outside annulus 510, the pressure of the oil outlet chamber 14 is reduced, and the first valve 11 cannot be opened, so that the fluid cannot flow into the pump barrel 13, at the moment, the load of the oil pumping equipment 400 is converted into the pressure difference between the pump barrel 13 and the outside annulus 510 by the gravity of the pump body 10 and the fluid inside the pump body, so that the acting force borne by the rod body 420 is increased, the load of the suspension point of the rod body 420 is increased, and the acting force borne by the oil pumping equipment 400 is correspondingly increased, so that the current of the lifting motor of the oil pumping equipment 400 is increased, and the power of the oil pumping equipment 400 is increased. The control module 410 of the surface 100 may monitor the power change of the pumping unit 400 and/or the load change at the suspension point where the pumping unit 400 is connected to the rod body 420, and then the control module 410 may acquire whether the pump body 10 of the downhole 200 is communicated with the external annulus 510, so that the communication module 20 may communicate/block the inside and outside of the pump body 10 regularly according to the coded instructions, and may transmit the coded information to the control module 410 through the power fluctuation of the pumping unit 400/the load change at the suspension point of the rod body 420. The control module 410 can demodulate and decode the power fluctuation/load change of the suspension point of the rod body 420 of the pumping unit 400 to obtain the information uploaded by the communication module 20. Preferably, the information may be the operating conditions of the downhole equipment and downhole parameters.

The working principle of the present invention is further explained for the sake of understanding. Referring to fig. 2, the valve body 24 and the second valve 12 are connected in parallel, that is, the valve body 24 can forcibly connect the oil chamber 14 to the outside. In a normal state, i.e., when communication is not required, the valve body 24 is normally closed, and the oil chamber 14 is not in communication with the outside. When the oil pumping device 400 goes down, the second valve 12 is closed, the valve body 24 is closed, and the oil outlet chamber 14 is further isolated from the outside, so that the pressure of the oil outlet chamber 14 is increased to open the first valve 11, and the fluid in the oil outlet chamber 14 enters the pump barrel 13 side, at this time, the load of the oil pumping device 400 can be simplified to the gravity borne by the rod body 420. If the valve body 24 is controlled to be opened during the down stroke of the oil pumping device 400, when the pressure in the oil outlet chamber 14 is increased, the fluid in the oil outlet chamber 14 flows back to the outside through the valve body 24 and the oil drainage port 15, so that the first valve 11 cannot be opened, and at this time, the load of the oil pumping device 400 is the pressure difference between the pump barrel 13 and the outside, so that the load of the oil pumping device 400 is increased, and further, the power of the motor of the oil pumping device 400 is increased.

Preferably, referring again to fig. 2, the communication module 20 communicates or blocks the interior of the pump body 10 with the outside through the valve body 24. Preferably, the valve body 24 is provided inside the pump body 10 in communication with the outside. Specifically, the communication module 20 includes a first tube 27. The side wall of the pump body 10 is provided with an oil drain port 15. The first pipe 27 communicates with the drain port 15. The valve body 24 may be provided at the drain port 15. The valve body 24 may also be disposed at the end of the first tube 27. Specifically, the first pipe 27 is closed at one end and provided with the valve body 24 at the other end.

Since the communication module 20 is provided in the oil outlet chamber 14, it is necessary for the communication module 20 to be able to pass fluid when the communication module 20 fills the oil outlet chamber 14. Preferably, the communication module 20 is provided with a second tube 28. The second tube 28 is for passing a fluid. The second tube 28 is used to connect the two parts of the oil outlet chamber 14 divided by the communication module 20.

Preferably, the communication module 20 is configured to open/close the valve body 24 to transmit information in a manner that changes the load on the oil well pumping apparatus 400. Preferably, the actuation valve 24 opens or closes to modulate the transmitted information into the suspension load fluctuation of the rod 420 or the power fluctuation of the oil pumping device 400 in a manner that changes the force the pump body 10 bears on the rod 420. In particular, with reference to fig. 3, the communication module 20 preferably comprises at least a processing unit 21, a drive unit 26 and a motor 25. The processing unit 21 is connected to the drive unit 26. The drive unit 26 is connected to the motor 25. The drive unit is used to drive the motor 25. The motor 25 is connected to the valve body 24. The processing unit 21 is configured to drive the valve body 24 to open/close by a motor 25. Preferably, the processing unit 21 is configured to drive the motor 25 based on the driving unit 26 to control the opening degree of the valve body 24. The motor 25 may be a brushless motor. Through the arrangement mode, the opening degree of the valve body 24 can be adjusted steplessly, so that the communication and the blocking between the oil outlet chamber 14 and the external annular space 510 are controlled.

Preferably, the Processing Unit 21 may be a Circuit, and may also be a Micro Control Unit (MCU), a Central Processing Unit (CPU), a general purpose Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), a Graphic Processing Unit (GPU), or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof.

Preferably, in order to achieve the purpose of communication or blocking between the inside and the outside of the pump body 10, those skilled in the art may also anticipate that the valve body 24 may be disposed at the drain opening 15, the valve body 24 may be disposed at the communication position between the drain opening 15 and the first pipe 27, the valve body 24 may be disposed near the end of the first pipe 27, and the like, and the purpose of communication or blocking between the inside and the outside of the pump body 10 may be achieved. Preferably, the skilled person can also foresee, instead of the valve body 24, parts controlling the passage of the fluid, for example mechanical means that can vary the communication of the cavity with the outside, such as moving valves, control valves, non-return valves, electric valves, high-pressure ball valves, etc. Preferably, the valve body 24 may also be a valve with a thin film. The above components can achieve the purpose of communication or blocking between the inside and the outside of the pump body 10.

Preferably, in the preferred embodiment described above, the communication module 20 is fixed inside the pump body 10, the first tube 27 inside the communication module 20 being in communication with the drain opening 15, for the purpose of providing, on the one hand, a passage for communication between the annulus 510 outside the pump body 10 and the inside of the pump body 10, and on the other hand, a valve body 24 may be provided at the end of the first tube 27 to enable communication or blocking between the inside and the outside of the pump body 10, but to achieve this, it is also possible to foresee a deformation of the communication module 20 free inside the pump body 10. For example, the communication module 20 can also move in the first direction or the second direction within the pump body 10, and the drain opening 15 can be blocked during movement of the communication module 20. With this arrangement, communication or blocking between the inside and outside of the pump body 10 can be achieved without the valve body 24.

Preferably, the following illustrates a specific embodiment in which the communication module 20 communicates through the valve body 24. Normally, the pumping unit 400 or pumping unit normally lifts a load (fluid or gas), and the process load of the up-down stroke varies periodically, as shown in the power waveform diagram of the pumping unit 400 in FIG. 6. The communication module 20 may first send a start signal to trigger the communication state when transmitting information. For example, when the communication module 20 transmits data under a pressure of 12 mpa, the communication module 20 first encodes the transmitted information or data. For example, three binary digits may be used for encoding. The first segment is a start signal or header data. The second segment represents the data type of the data to be transmitted. The third section is the concrete content of the transmitted data. For example, the start signal may be represented by 05. The second segment may use 02 to indicate that the data address points to pressure. The third segment is 12. Namely, the communication module encodes 05/02/12 to convert into binary 0101/0010/1010. The communication module 20 intervenes in the power waveform of the down stroke through the valve body 24. When the communication module 20 or the processing unit 21 sends "1", it is determined that the rod body 420 or the pump barrel 13 is in the down stroke state, the valve body 24 is opened and then closed, so that the pulling force of the rod body 420 is suddenly increased and then returns to normal, which may be referred to as "interference" generated by the power of the oil pumping equipment 400 during the down stroke in fig. 7. When the communication module 20 or the processing unit 21 transmits "0", the valve body 24 may be kept in the closed state. Preferably, the communication module 20 or the processing unit 21 may be configured to open and close the valve body 24 multiple times for a multi-position transmission in a single down stroke period.

Preferably, referring to fig. 3, the communication module 20 may be provided with a built-in battery 29. The internal battery 29 may power the electrical components within the communication module 20. Preferably, the well 200 may also be provided with power generation equipment. The power generation device may be used to power the communication module 20. The power generation device may also supply power to the built-in battery 29.

Preferably, referring to fig. 3, the communication module 20 further comprises a sensing unit 23. The sensing unit 23 includes one or more of a flow sensor, a temperature sensor, a pressure sensor, and a moisture content sensor. Preferably, the sensing unit 23 may further include a displacement sensor. Preferably, the communication module 20 is configured to perform the following steps:

acquiring monitoring data based on the sensing unit 23;

encoding the monitoring data according to a preset encoding mode;

the opening degree of the valve body 24 is controlled according to the coded command.

Preferably, the monitoring data includes downhole operating conditions and environmental parameters. Downhole conditions and environmental parameters include temperature, pressure, vibration, flow, moisture content, and the like. Controlling the valve body 24 to open or close according to the coded command can form a load change corresponding to the power change of the oil pumping unit 400 or the suspension point of the rod body 420.

Preferably, the control module 410 is used to detect changes in power to the oil well rig 400 and/or changes in load at the suspension point of the rod body 420.

Preferably, the control module 410 is electrically connected to the pumping unit 400. The control module 410 can be located at a control cabinet of the lift motor of the oil well pumping apparatus 400. The control module 410 is configured to monitor changes in power of the oil well pumping apparatus 400 in real time. The control module 410 is capable of controlling at least the motion state of the pumping unit 400. Preferably, the control module 410 includes a power detection unit and a control unit. The power detection unit is used for monitoring the power change of the oil pumping equipment 400 and/or the load change of the suspension point of the rod body 420 in real time. The power detection unit may be a three-phase power detection device. Preferably, the load of the suspension point can also be monitored by a pumping unit load sensor. The control unit is used for controlling the motion state of the oil pumping device 400. The control unit may be a control circuit. The control Unit may also be a Micro Control Unit (MCU), a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), a Graphics Processing Unit (GPU), or other Programmable logic device, transistor logic, hardware component, or any combination thereof.

Preferably, the motion states of the pumping unit 400 include start stop, stroke state and stroke state. The stroke of the pumping unit 400 may be the distance between the top dead center and the bottom dead center where the polished rod of the pumping unit 400 travels. The stroked state includes an up stroke and a down stroke. The upstroke may indicate that the pumping apparatus 400 is driving the rod body 420 in a first direction. The downstroke may indicate that the pumping unit 400 is driving the rod body 420 in a second direction. The number of strokes may represent the number of times rod body 420 reciprocates axially along casing 500/tubing 600 per unit time.

Preferably, the control module 410 can control the motion state of the pumping unit 400. The control module 410 is configured to control the motion state of the pumping unit 400 to change the motion state of the rod body 420. The motion states of the rod body 420 include start stop, stroke state and stroke state. In one aspect, the stroke state may represent that the rod body 420 moves in a first direction or in a second direction. On the other hand, the stroke state may also represent a distance that the rod body 420 moves from the bottom dead center to the top dead center in the first direction, or a distance that the rod body 420 moves from the top dead center to the bottom dead center in the second direction.

Preferably, the control module 410 is configured to load/modulate the transmitted information into the change of the motion state of the rod body 420 based on the manner in which the pumping unit 400 drives the change of the motion state of the rod body 420. Or the control module 410 may be configured to take the change in the motion state of the pumping unit 400 as a carrier for information transfer. Preferably, the communication module 20 is configured to acquire the information transmitted by the control module 410 after determining/recognizing the motion state of the stick body 420. By this arrangement, it is possible for the control module 420 to transmit information to the downhole communication module 200, i.e. data or instructions from the surface 100 to the downhole 200.

Preferably, the shaft body 420 or the pump shaft can extend into the communication module 20, and the communication module 20 can transmit information/data by changing the resistance of the shaft body 420 or the pump shaft when moving. For example, the lever body 420 or pump lever can be inserted into the communication module 20, see fig. 2. Preferably, a resistance is provided within the communication module 20. The rod body 420 or pump rod is inserted into or through the resistance member. The resistance element surrounds the rod body 420 or pump rod. The resistance element can be elastically deformed under the driving of the communication module 20/the processing unit 21 so as to abut against the rod body 420 or the pump rod, so as to increase the resistance when the rod body 420 or the pump rod moves. Or the resistance members are segmented and can move relative to each other under the driving of a motor or a hydraulic device in the communication module 20, and further can abut against the rod body 420 or the pump rod, so that the resistance of the rod body 420 or the pump rod during movement is increased. Or the resistance member may be a balloon which, upon inflation, may abut the lever body 420 or pump lever against one another to increase friction and thereby resist movement of the lever body 420 or pump lever.

Preferably, the channel in the communication module 20 through which the rod body 420 or the pump rod moves may be provided with a nozzle that may spray a liquid that increases resistance or decreases resistance. For example, the liquid that increases resistance may be a relatively viscous oil. The liquid that reduces resistance may be a lubricating oil. Preferably, referring to fig. 3, the communication module 20 further comprises a power generation unit 22. The power generating unit 22 can change the resistance when the rod body 420 or the pump rod moves. Preferably, the communication module 20 may also determine/recognize the motion state of the stick body 420 through the power generation unit 22, and may also convert the motion of the stick body 420 into electric energy. Specifically, referring to fig. 2, 4 and 5, the lever body 420 is connected with the pump barrel 13. The lever 420 can drive the pump barrel 13 to move in a first direction or a second direction. Preferably, a connecting rod is provided at a side of the pump barrel 13 opposite to the rod body 420. The connecting rod may be a pump rod. The connecting rods extend into the telecommunications module 20. Referring to fig. 2, the part of the connecting rod entering the power generating unit 22 of the communication module 20 is a lead screw 421. Referring to fig. 5, the lead screw 421 is provided with a groove 214. The groove 214 is arranged in a manner spirally surrounding the lead screw 421. Preferably, the screw 421 can be a trapezoidal screw, i.e. the groove 214 is trapezoidal in the cross section along the axial direction of the screw 421. Referring again to fig. 5, the power generation unit 22 includes a stator 207 and a rotor 212. The rotor 212 is sleeved in the stator 202. The stator 207 serves to generate a rotating magnetic field. The lead screw 421 is sleeved in the rotor 212. The side of the rotor 212 facing the lead screw 421 is provided with a convex body 215. The projection 215 can extend into the groove 214. With this arrangement, the rotor 212 can be driven to rotate when the lead screw 421 moves in the first direction/the second direction. The rotation of the rotor 212 can cut the magnetic field generated by the stator 207, thereby generating electrical energy. Specifically, when the screw 421 moves in the first direction/the second direction, the convex body 215 of the rotor 212 can slide/roll along the groove 214 spirally disposed on the screw 421, so that the rotor 212 is rotated about the axis thereof by the convex body 215. Preferably, the processing unit 21 or the communication module 20 may determine the moving direction and frequency of the rod body 420 through the phase sequence of the power generation unit 22. Whether the rod body 420 is in the up stroke and the down stroke can be judged by the moving direction. The frequency can be used to determine the stroke of the rod 420. Preferably, the communication module 20 or the processing unit 21 can determine the rotation speed of the rotor 212 through the voltage of the power generation unit 22, and further determine the stroke of the rod body 420. Further, if the power generation unit 22 does not generate power, it may be judged that the lever body 420 is in a standstill state. It should be noted that the upstroke, downstroke, stroke count, and dwell of the pumping unit 400 are synchronized with the upstroke, downstroke, and dwell of the rod body 420.

Preferably, the communication module 20 or the processing unit 21 may be configured to increase the load of the generator so that the power of the generator becomes larger, thereby increasing the resistance when the lead screw 421 moves. Through the arrangement, the power generation unit 22 can change the resistance borne by the rod body 420 or the pump rod, so that the load of the oil pumping equipment 400 is increased, and further, the information transmission is realized. Specifically, the communication module 20 or the processing unit 21 transmits information through the resistance element or the power generation unit 22 in a manner similar to the transmission of information through the valve body 24, requiring the transmission of a start signal, data type and data, except that changes in the load of the oil well pumping unit 400 can be applied during the up stroke and down stroke of the oil well pumping unit 400, respectively. Referring to fig. 8, when the communication module 20 or the processing unit 21 sends "1", the load may be increased by the resistance member or the power generating unit 22 in the down stroke or the up stroke and then restored to the normal load, so that the resistance of the lever body 420 is suddenly increased and then restored to the normal state. Likewise, the communication module 20 or the processing unit 21 may be configured to control the resistance or power generation unit 22 multiple times for multiple bit transfers during a single down-stroke or up-stroke time period.

The structure of a preferred embodiment of the communication module 20 is preferably as shown in fig. 4. The communication module 20 includes a circuit cartridge 202. The internal components of the communication module 20 are disposed within the circuit housing 202. The telecommunications module 20 further comprises an upper connector 201. The upper joint 201 is used for connecting with the oil pipe 600 or with the inner wall of the pump body 10. The other end of the upper connector 210 is connected to the circuit outer cylinder 202. . The upper joint 201 is provided with a thread passing rod 203 along the second direction. The upper joint 201 is provided with a thread passing rod 203 in a direction toward the bottom of the well. The wire-passing rod 203 is used for passing through and sealing cables in the communication module 20. One end of the thread passing rod 203 is connected to the upper joint 201. The other end of the threading rod 203 is connected with the circuit isolation cylinder 204. . A control valve assembly 216 is provided in the communication module 20 on the side opposite to the wire-passing rod 203. The control valve assembly 216 is used to control flow or shut-off. The control valve assembly 216 is connected to the upper connector 210 at one end and to the circuit isolation cartridge 204 at the other end. . The side of the threading rod 203 facing the well bottom is provided with a circuit isolation cylinder 204. The circuit isolation cylinder 204 is hermetically connected with the circuit outer cylinder 202. The hollow portion of the circuit isolation cylinder 204 can form an enclosed space. A circuit board is arranged in the closed space. The enclosed space inside the circuit isolation cylinder 204 can isolate the liquid flow and make a circuit board. The side of the circuit isolation cylinder 204 facing the bottom of the well is provided with an intermediate joint 205. The circuit isolation cylinder 204 is hermetically connected with the intermediate joint 205. The intermediate connector 205 is detachably connected to the circuit outer cylinder 202. The removable means may be a threaded connection, welding, hinging, snap-fit connection, etc. The intermediate coupling 205 is detachably connected to the generator housing 208. The intermediate connector 205 is used to connect the power generation unit 22 with the flow regulating control valve assembly 216 and for cable transit. The side of the intermediate joint 205 facing the bottom of the well is provided with an inner battery barrel 206. The battery inner tube 206 is used for placing the built-in battery 29. The side of the battery inner barrel 206 facing the well bottom is provided with a generator housing 208. The generator housing 208 has the power generation unit 22 disposed therein. The power generation unit 22 surrounds the lead screw 421. The power generation unit 22 includes a stator 207 and a rotor 212. Preferably, the inner battery can 206 is connected to the stator 207 at one end and the intermediate joint 205 at the other end. Preferably, the battery inner barrel 206 can serve as a central passage for fluid, isolate fluid flow, and hold the internal battery 29. Preferably, rotor 212 is coupled to stator 207 by first bearing outer ring 210 and second bearing outer ring 211. One end of the rotor 212 is hinged to the stator 207 through a first bearing outer ring 210, and the other end is hinged to the stator 207 through a second bearing outer ring 211. The side of the second bearing outer ring 211 opposite the rotor 212 is connected to a bearing joint 213. The end of the bearing adapter 213 opposite the second bearing outer race 211 is connected to the lower adapter 209. The lower joint 209 is connected to the generator housing 208 at one end and to the oil pipe 600 at the other end. The lower joint 209 is used to fix the power generation unit 22.

According to another preferred embodiment, the outer side of the lead screw 421 is provided with a helical protrusion, e.g. a thread. A groove is formed on one side of the rotor 212 facing the lead screw 421. The protrusion of the lead screw 421 can be engaged with the groove of the rotor 212. The groove of the rotor 212 can slide/roll along the protrusion of the lead screw 421. With this arrangement, in the case where the lead screw 421 moves in the first/second directions, the lead screw 421 can slide/roll along the protrusions by the protrusions driving the grooves, so that the rotor 212 rotates.

Preferably, the communication module 20 is configured to perform the following steps:

encoding the monitoring data according to a preset encoding mode;

judging/identifying whether the rod body 420 is in a motion state for transmitting information;

if the rod 420 is not in motion for transmitting information;

the valve body 204 is controlled to open/close based on the coded command.

Referring again to fig. 2, 4 and 5, a passage for fluid may be formed at the lead screw 421. I.e., fluid entering the annulus 510, can be communicated through the apertures at the lead screw 421 and/or the second tube 28.

Example 2

The present embodiments provide a wireless communication method for uploading downhole data to the surface. The manner disclosed in this embodiment may be implemented by the wireless communication apparatus disclosed in embodiment 1, and in the case where no contradiction occurs, part or all of the implementation manner of embodiment 1 may be implemented as a supplement to this implementation manner, and repeated content is not described again.

The method comprises the following steps:

changing the force experienced by the rod body 420 during movement transmits information or data in a manner that changes the load on the pumping unit 400.

Preferably, the information can be modulated into the load fluctuation of the oil pumping device 400 by controlling the communication between the inside and the outside of the pump body 10 or blocking the change of the force applied by the pump body 10 to the rod body 420. Preferably, the information can be modulated into the power variation of the pumping unit 400 driving the rod body 420 by controlling the communication between the inside and the outside of the pump body 10 or blocking the change of the force applied to the rod body 420 by the pump body 10. Preferably, the information can be modulated in the load variation of the pumping unit 400 by changing the force applied to the rod body 420 through a resistance element or a power generation unit directly or indirectly connected to the rod body 420. It should be noted that the present invention relates to the transmission of information. The information involved in the present invention may be downhole conditions and parameters. In the present invention, the entity of information transmission is data, i.e. data is the entity carrying information, which is embodied as a series of meaningful symbol sequences. The data transmission mode can be serial transmission or parallel transmission. The signal referred to in the present invention is an electrical/electromagnetic representation of data, which is the form of the presence of data during transmission. The signal may be an analog signal (continuous signal) or a digital signal (discrete signal). For example, the present invention may obtain information such as downhole conditions and parameters through the sensing unit 23. The downhole conditions and parameters may be transmitted to the processing unit 21 in the form of analog signals. The processing unit 21 processes the acquired downhole conditions and parameters to form data, and transmits the data in a digital signal mode.

Preferably, the modulation is a variation of one or several carrier parameters in accordance with the information to be transmitted. For example, information can be loaded/modulated into the load of the oil well pumping apparatus 400 by changing the load on the rod 420 and/or the plunger/barrel 13/rod within the pump body 10. For example, the movement of the rod 420 and/or the plunger/barrel 13/rod inside the pump body 10 is changed according to the information to be transmitted. The communication module 20 can change the force applied to the rod body 420 and/or the plunger/barrel 13/rod body within the pump body 10 or change the load on the oil well pumping apparatus 400 according to the information to be transmitted.

Preferably, a valve body 24 may be disposed in the pump body 10 at a communication position between the inside and the outside, and the acting force of the pump body 10 on the rod body 420 is changed by driving the valve body 24 to open or close, so that information uploaded downhole can be obtained by monitoring the power of the oil pumping equipment 400 connected to the rod body 420 or monitoring the load change at the suspension point of the rod body 420.

Specifically, the surface 100 is provided with a pumping unit 400 and a control module 410. The downhole 20 is provided with a casing 500, tubing 600, a body of rod 420 and a communication module 20 for communication. The control module 410 is used to control the motion state of the oil well pumping unit 400. The control module 410 may also monitor changes in power of the oil well pumping apparatus 400. The pumping unit 400 may be a pumping unit, such as a beam pumping unit or a walking beam-less pumping unit. The beamless pumping unit can be a chain type pumping unit, a steel rope pumping unit, a hydraulic type pumping unit, a crank connecting rod type pumping unit and the like. Preferably, the oil well pumping device 400 can be replaced with a suction device. The air extraction device can be a walking beam type air extractor or a non-walking beam type air extractor. Preferably, the oil pumping apparatus 400 is driven by a work-producing device, such as a lift motor. The oil tube 600, the pump body 10 and the communication module 20 are disposed within the casing 500. The rod body 420 is sleeved in the oil pipe 600. The oil pipe 600 is connected to the pump body 10. The rod body 420 is connected to the pump body 10. Preferably, the rod body 420 may be a rigid elongated body, such as a sucker rod. Rod body 420 may also be a flexible elongated body such as a steel cable or chain. Preferably, the sleeve 500 is hollow. One end of the casing 500 is near the surface and the other end is at the bottom of the well. The sleeve 500 may be a cylinder or a polygonal cylinder. The oil pipe 600 is hollow. The radial cross-section of the oil pipe 600 may be circular or polygonal. Preferably, the pump body 10 may also be sleeved in the oil pipe 600. The end of the oil pipe 600 on the side away from the ground is blocked by the pump body 10. The pump body 320 may be a rod pump or a tube pump.

Preferably, the oil well pumping apparatus 400 is used to pull or push the rod body 420 in a first direction or a second direction. The first direction is toward the ground 100 side. The second direction is toward the bottom hole side of the well 200. Preferably, the pumping unit 400 pulls or pushes the components inside the pump body 10 in the first direction or the second direction by the rod body 420. More specifically, the pumping unit 400 is coupled to the rod body 420. The rod body 420 is connected to the pump body 10. Preferably, the pumping unit 400 moves the rod body 420 in a first direction or a second direction. Preferably, the pumping unit 400 drives the rod 420 to move in a first direction to an upstroke state. The pumping unit 400 drives the rod body 420 to move in the second direction to a downstroke state. Preferably, when the pumping unit 400 stops, the rod body 420 stops, and is in a stopped motion state.

Preferably, the lever body 420 may be connected to the pump barrel 13 only, and may not extend into the communication module 20 or between the first valve 11 and the second valve 12. The lever body 420 can on the other hand extend through the pump barrel 13 and between the first valve 11 and the second valve 12. Or the rod 420 may extend through the pump barrel 13 into the communication module 20. Preferably, the lever body 420 is connected to one side of the pump barrel 13. The other side of the pump barrel 13 opposite to the rod body 420 is provided with a pump rod. The pump rod extends between the first valve 11 and the second valve 12. The pump rod can be moved in a first direction or a second direction by the pump barrel 13.

Preferably, the oil well pumping device 400 drives the pump barrel 13 or pump rod in the pump body 10 to move periodically in the first direction or the second direction. Preferably, the pumping unit 400 moves the rod body 420 along the axis/axial direction of the casing 500/tubing 600. Preferably, the pumping unit 400 drives the rod body 420 to move periodically in the first direction or the second direction. The pumping unit 400 drives the rod body 420 to move up and down periodically along the axis of the casing 500/tubing 600. Preferably, the rod body 420 is moved along the axial/axial direction of the casing 500/tubing 600 by the pumping unit 400. Preferably, the rod body 420 is moved along the axial/axial direction of the rod body 420 by the pumping unit 400. Preferably, the pump barrel 13 or pump rod in the pump body 10 moves along the axial direction/axis of the rod body 420 under the driving of the rod body 420. The barrel 13 or pump rod in the pump body 10 moves along the axis/axial direction of the casing 500/oil pipe 600 by the rod body 420. The barrel 13 or the pump rod in the pump body 10 is driven by the rod body 420 to move in a first direction or a second direction. The barrel 13 or the pump rod in the pump body 10 is periodically moved in the first direction or the second direction by the lever body 420.

Preferably, the pump body 10 and a portion of the rod body 420 are disposed downhole 200. The pump barrel 13 or the pump rod in the pump body 10 moves along the rod body 420 in the first direction or the second direction under the driving of the oil pumping device 400. Either the barrel 13 or the pump rod in the pump body 10 moves with the rod body 420 toward the ground 100 side or toward the bottom hole side under the driving of the pumping unit 400. The pump body 10 of the present invention may preferably work on the same principle as a tube pump/rod pump.

Preferably, the communication module 20 is configured to modulate information/data into changes in the load of the oil pumping apparatus 400 based on controlling the communication/blocking of the interior of the pump body 10 with the exterior to change the force applied to the rod body 420 by the pump body 10. Preferably, the communication module 20 is configured to transmit information/data in such a way as to vary the force to which the rod 420 is subjected, based on controlling whether the interior of the pump body 10 is in communication with the exterior. Preferably, the communication module 20 can control the communication/blocking of the interior of the pump body 10 with the outside through the valve body 24 or by moving itself. Specifically, the pump barrel 13 in the pump body 10 can lift the fluid in the oil layer 300 to the ground 100 in case of moving in the first direction or the second direction. When the communication module 20 is configured to close the communication between the inside of the pump body 10 and the outside, the pump body 10 as a closed whole exerts on the rod 420 its own weight and the weight of the fluid it contains. When the communication module 20 is configured to open the communication between the inside and the outside of the pump body 10, the pump body 10 is communicated with the outside, and the acting force on the rod body 420 is converted into the pressure difference between the inside and the outside of the pump body 10, so that the acting force on the rod body 420 is increased, and the load of the oil pumping device 400 is increased. The increased load on the pumping unit 400 causes a load at the point where it is attached to the rod body 420 or causes the pumping unit 400 to increase in power.

at the present stage, regarding monitoring of working conditions and downhole parameters of downhole equipment for oil production, the working conditions and parameters are usually modulated into electromagnetic waves/acoustic waves as carriers of information, and the electromagnetic waves/acoustic waves are transmitted to the ground through transmission media such as downhole fluid, a casing 500, an oil pipe 600, a rod body 420 and the like. However, on one hand, due to the fact that the underground medium components are more, the characteristics of the stratum and the oil layer are distributed in a complex manner and are not uniform, and in addition, due to the severe high-temperature and high-pressure environment in the underground, the attenuation and interference of electromagnetic waves/sound waves are large when the electromagnetic waves/sound waves are transmitted in the underground, signals are very weak when the signals are transmitted to the ground or the underground, and the ground background noise and the underground high-frequency/low-frequency interference cause great difficulty in accurate extraction of the signals, and even if the ultralow-frequency electromagnetic waves are used for communication, the noise is difficult to filter. The invention integrates two steps of monitoring the working condition and uploading information, namely, the information is transmitted through the change of the working condition. The working condition of the downhole equipment is used as a carrier for information transmission, and after the working condition is monitored, the acting force applied to the rod body 420 is actively changed, so that the load of the pumping equipment 400 on the ground 100 is changed, and the downhole uploaded information can be acquired by monitoring the power of the pumping equipment 400 or the load of a suspension point of the pumping equipment 400 on one side of the ground. According to the invention, information is modulated in a mode of acting force on the rod body 420, on one hand, electromagnetic waves or sound waves are not adopted as carriers of the information, and the defects of great transmission attenuation and interference of the electromagnetic waves/sound waves in the underground can be avoided; on the other hand, the modulation and demodulation scheme of the invention is simple, information can be modulated on the load of the oil pumping equipment 400 only by communicating or blocking the inside and the outside of the pump body 10 or changing the resistance when the oil pumping equipment is in contact with the rod body 420 or the pump rod, and the information uploaded underground can be demodulated according to the curve of power fluctuation or load fluctuation only by directly reading the load change of the oil pumping equipment 400 or the change of the suspension point load of the oil pumping equipment 400 when the ground equipment receives the information, for example, the information uploaded underground can be acquired according to the amplitude, the cycle length, the middle pause duration and other information of the fluctuation curve, so that the cost is reduced on the basis of improving the reliability and the stability of information transmission. Moreover, the method provided by the invention is also beneficial to large-scale deployment, has high compatibility with oil extraction equipment at the present stage, and basically adopts oil extraction equipment such as an oil pumping machine, an oil pumping rod, a pump body and the like in an oil field oil extraction application scene, and the monitoring of the power of the oil pumping machine is a conventional means in the field, so that the oil extraction method provided by the invention can directly replace an oil well pump. In addition, compared with the wireless communication technologies such as Zigbee, bluetooth and radio frequency adopted at the present stage, the attenuation is serious under the underground working condition, and long-distance transmission cannot be realized. The invention can realize the remote communication from the underground to the ground. The distance of communication is determined by the depth of the underground well, and theoretically, the distance of communication is not limited, and communication with the ground surface in the underground well with the distance more than 1000m can be realized at least in the embodiment.

Preferably, the pump barrel 13 moves with the lever 420 in the first direction in case the lever 420 moves in the first direction, or in case the lever 420 strokes. In the case of a movement of the pump barrel 13 in the first direction, the first valve 11 is closed. The first valve 11 is closed due to its own weight and the pressure in the pump barrel 13. In the case of a movement of the pump barrel 13 in the first direction, the second valve 12 opens. Since the first valve 11 is closed, the pressure of the outlet oil chamber 14 is reduced, resulting in the pressure of the outlet oil chamber 14 being smaller than the pressure of the fluid on the second direction side of the second valve 12, and thus the second valve 12 is opened. With the second valve 12 open, fluid in the reservoir 300 can pass from the annulus 510 into the oil outlet chamber 14. Annulus 510 is the space between casing 500 and tubing 600. It should be noted that the communication module 20 is provided with a passage through which fluid passes, so that two spaces of the oil outlet chamber 14 partitioned by the communication module 20 are communicated. In addition, the communication module 20 may not be provided with the channel. Since the communication module 20 may not entirely fill the cross section of the oil outlet chamber 14, a gap is present between the communication module 20 and the oil outlet chamber 14, through which fluid in the oil outlet chamber 14 can flow.

Preferably, the pump barrel 13 moves with the lever 420 in the second direction in case the lever 420 moves in the second direction, or in case the lever 420 downstroke. In the case of a movement of the pump barrel 13 in the second direction, the second valve 12 is closed and the first valve 11 is opened. The pump barrel 13 moves in the second direction under the action of the rod body 420, and further compresses the fluid in the oil outlet chamber 14, and further, when the pressure of the oil outlet chamber 14 is greater than the pressure of the second direction side of the second valve 12, the second valve 12 is closed. I.e. in case the pump barrel 13 is moved in the second direction, the second valve 12 is closed. When the second valve 12 is closed, the pressure of the oil outlet chamber 14 continues to increase. When the pressure in the oil outlet chamber 14 is higher than the pressure of the pump barrel 13, the first valve 11 opens. When the first valve 11 is opened, the fluid in the oil outlet chamber 14 enters the pump barrel 13 and is discharged along the oil pipe 600, so as to lift the fluid in the pump barrel 13 to the ground 100, and the load of the oil pumping device 400 or the acting force of the oil pumping device 400 is the gravity force borne by the rod body 420, which is the self weight of the pump body 10 and the sucked fluid.

under the condition that the inside of the pump body 10 is blocked/isolated from the outside, the pump barrel 13 of the pump body 10 is driven by the oil pumping device 400 to move along the first direction and the second direction, so as to lift the crude oil in the oil reservoir 300 to the ground, and at this time, the load of the oil pumping device 400 can be simplified to the gravity borne by the rod body 420, specifically, the gravity of the pump body 10 and the sucked fluid. Under the condition that the inside of the pump body 10 is communicated with the outside, the pump barrel 13 moves along the second direction, and as the oil outlet chamber 14 is communicated with the outside annulus 510, the pressure of the oil outlet chamber 14 is reduced, and the first valve 11 cannot be opened, so that the fluid cannot flow into the pump barrel 13, at the moment, the load of the oil pumping equipment 400 is converted into the pressure difference between the pump barrel 13 and the outside annulus 510 by the gravity of the pump body 10 and the fluid inside the pump body, so that the acting force borne by the rod body 420 is increased, the load of the suspension point of the rod body 420 is increased, and the acting force borne by the oil pumping equipment 400 is correspondingly increased, so that the current of the lifting motor of the oil pumping equipment 400 is increased, and the power of the oil pumping equipment 400 is increased. The control module 410 of the surface 100 may monitor the power change of the pumping unit 400 and/or the load change at the suspension point where the pumping unit 400 is connected to the rod body 420, and then the control module 410 may acquire whether the pump body 10 of the downhole 200 is communicated with the external annulus 510, so that the communication module 20 may communicate/block the inside and outside of the pump body 10 regularly according to the coded instructions, and may transmit the coded information to the control module 410 through the power fluctuation of the pumping unit 400/the load change at the suspension point of the rod body 420. The control module 410 can demodulate and decode the power fluctuation/load change of the suspension point of the rod body 420 of the pumping unit 400 to obtain the information uploaded by the communication module 20. Preferably, the information may be the operating conditions of the downhole equipment and downhole parameters.

The working principle of the present invention is further explained for the sake of understanding. Referring to fig. 2, the valve body 24 and the second valve 12 are connected in parallel, that is, the valve body 24 can force the oil chamber 14 to communicate with the outside. In a normal state, i.e., when communication is not required, the valve body 24 is normally closed, and the oil chamber 14 is not in communication with the outside. When the oil pumping device 400 goes down, the second valve 12 is closed, the valve body 24 is closed, and the oil outlet chamber 14 is further isolated from the outside, so that the pressure of the oil outlet chamber 14 is increased to open the first valve 11, and the fluid in the oil outlet chamber 14 enters the pump barrel 13 side, at this time, the load of the oil pumping device 400 can be simplified to the gravity borne by the rod body 420. If the valve body 24 is controlled to be opened during the down stroke of the oil pumping device 400, when the pressure of the oil outlet chamber 14 is increased, the fluid in the oil outlet chamber 14 flows back to the outside through the valve body 24 and the oil drain port 15, so that the first valve 11 cannot be opened, the load of the oil pumping device 400 is the pressure difference between the pump barrel 13 and the outside, the load of the oil pumping device 400 is increased, and the power of the motor of the oil pumping device 400 is increased.

Preferably, referring again to fig. 2, the communication module 20 communicates or blocks the interior of the pump body 10 with the exterior through the valve body 24. Preferably, the valve body 24 is provided inside the pump body 10 in communication with the outside. Specifically, the communication module 20 includes a first tube 27. The side wall of the pump body 10 is provided with an oil drain port 15. The first pipe 27 communicates with the drain port 15. The valve body 24 may be provided at the drain port 15. The valve body 24 may also be disposed at the end of the first tube 27. Specifically, the first pipe 27 is closed at one end and provided with the valve body 24 at the other end.

Preferably, the communication module 20 is configured to open/close the valve body 24 to transmit information in a manner that changes the load on the oil well pumping apparatus 400. Preferably, the actuating valve 24 opens or closes to modulate the transmitted information into the rod 420 in a manner that changes the force applied to the rod 420 by the pump body 10 or the power fluctuations of the oil pumping apparatus 400. In particular, with reference to fig. 3, the communication module 20 preferably comprises at least a processing unit 21, a drive unit 26 and a motor 25. The processing unit 21 is connected to the drive unit 26. The drive unit 26 is connected to the motor 25. The drive unit is used to drive the motor 25. The motor 25 is connected to the valve body 24. The processing unit 21 is configured to drive the valve body 24 to open/close by a motor 25. Preferably, the processing unit 21 is configured to drive the motor 25 based on the driving unit 26 to control the opening degree of the valve body 24. The motor 25 may be a brushless motor. Through the arrangement mode, the opening degree of the valve body 24 can be adjusted steplessly, so that the communication and the blocking between the oil outlet chamber 14 and the external annular space 510 are controlled.

Preferably, in the preferred embodiment described above, the communication module 20 is fixed inside the pump body 10, the first tubular body 27 inside the communication module 20 communicating with the drain opening 15, the purpose of which is, on the one hand, to provide a passage for communication between the annulus 510 outside the pump body 10 and the inside of the pump body 10, and on the other hand, a valve body 24 may be provided at the end of the first tubular body 27 to enable communication or blocking between the inside and the outside of the pump body 10, but to achieve this, deformations of the communication module 20 free from the inside of the pump body 10 are also foreseen. For example, the communication module 20 can also move in the first direction or the second direction within the pump body 10, and the oil drain opening 15 can be blocked during movement of the communication module 20. With this arrangement, communication or blocking between the inside and outside of the pump body 10 can be achieved without the valve body 24.

Preferably, the following illustrates a specific embodiment in which the communication module 20 communicates through the valve body 24. Normally, the pumping unit 400 or pumping unit normally lifts a load (fluid or gas), and the process load of the up-down stroke varies periodically, as shown in the power waveform diagram of the pumping unit 400 in FIG. 6. The communication module 20 may first send a start signal to trigger the communication state when transmitting information. For example, when the communication module 20 transmits data under a pressure of 12 mpa, the communication module 20 first encodes the transmitted information or data. For example, three binary digits may be used for encoding. The first segment is a start signal or header data. The second segment represents the data type of the data to be transmitted. The third section is the concrete content of the transmitted data. For example, the start signal may be represented by 05. The second segment may use 02 to indicate that the data address points to pressure. The third segment is 12. Namely, the communication module encodes 05/02/12 to convert into binary 0101/0010/1010. The communication module 20 intervenes in the power waveform of the down stroke through the valve body 24. When the communication module 20 or the processing unit 21 sends "1", the valve body 24 is opened and then closed when the rod 420 or the pump barrel 13 is judged to be in the down stroke state, so that the tensile force of the rod 420 is suddenly increased and then returns to normal, which can be referred to as "interference" generated by the power of the oil pumping device 400 in the down stroke process in fig. 7. When the communication module 20 or the processing unit 21 transmits "0", the valve body 24 may be kept in the closed state. Preferably, the communication module 20 or the processing unit 21 may be configured to open and close the valve body 24 multiple times for a multi-position transmission in a single down stroke period.

Preferably, referring to fig. 3, the communication module 20 further comprises a sensing unit 23. The sensing unit 23 includes one or more of a flow sensor, a temperature sensor, a pressure sensor, and a water content sensor. Preferably, the sensing unit 23 may further include a displacement sensor. Preferably, the communication module 20 is configured to perform the following steps:

acquiring monitoring data based on the sensing unit 23;

encoding the monitoring data according to a preset encoding mode;

Preferably, the control module 410 is electrically connected to the oil well pumping apparatus 400. The control module 410 may be located at a control cabinet of the lift motor of the oil pumping apparatus 400. The control module 410 is configured to monitor changes in power of the oil well pumping apparatus 400 in real time. The control module 410 is capable of controlling at least the motion state of the pumping unit 400. Preferably, the control module 410 includes a power detection unit and a control unit. The power detection unit is used for monitoring the power change of the oil pumping equipment 400 and/or the load change of the suspension point of the rod body 420 in real time. The power detection unit may be a three-phase power detection device. Preferably, the load of the suspension point can also be monitored by a pumping unit load sensor. The control unit is used for controlling the motion state of the oil pumping device 400. The control unit may be a control circuit. The control Unit may also be a Micro Control Unit (MCU), a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), a Graphics Processing Unit (GPU), or other Programmable logic device, transistor logic device, hardware component, or any combination thereof.

Preferably, the motion states of the pumping unit 400 include start stop, stroke state and stroke state. The stroke of the pumping unit 400 can be the distance between the top dead center and the bottom dead center of the polished rod of the pumping unit 400. The stroke state includes an up stroke and a down stroke. The upstroke may indicate that the pumping apparatus 400 is driving the rod body 420 in a first direction. The downstroke may indicate that the pumping unit 400 is driving the rod body 420 in a second direction. The number of strokes may represent the number of times rod body 420 reciprocates axially along casing 500/tubing 600 per unit time.

Preferably, the control module 410 can control the motion state of the pumping unit 400. The control module 410 is configured to control the motion state of the pumping unit 400 to change the motion state of the rod body 420. The motion states of the rod body 420 include start stop, stroke state and stroke state. In one aspect, the stroke state may represent movement of the rod body 420 in a first direction or movement in a second direction. On the other hand, the stroke state may also represent a distance that the rod body 420 moves from a bottom dead center to a top dead center in the first direction, or a distance that the rod body 420 moves from a top dead center to a bottom dead center in the second direction.

Preferably, the shaft body 420 or the pump shaft can extend into the communication module 20, and the communication module 20 can transmit information/data by changing the resistance of the shaft body 420 or the pump shaft when moving. For example, the rod body 420 or pump rod can be inserted into the communication module 20, see fig. 2. Preferably, a resistance is provided within the communication module 20. The rod body 420 or pump rod is inserted into or through the resistance member. The resistance element surrounds the rod body 420 or pump rod. The resistance element can be elastically deformed under the driving of the communication module 20/the processing unit 21 so as to abut against the rod body 420 or the pump rod, so as to increase the resistance when the rod body 420 or the pump rod moves. Or the resistance members are segmented and can move relative to each other under the driving of a motor or a hydraulic device in the communication module 20, so that the resistance members can abut against the rod body 420 or the pump rod, and the resistance of the rod body 420 or the pump rod during movement is increased. Or the resistance member may be a balloon which, upon inflation, may abut the lever body 420 or pump lever against one another to increase friction and thereby resist movement of the lever body 420 or pump lever.

Preferably, the channel in the communication module 20 through which the rod body 420 or the pump rod moves may be provided with a nozzle that can spray a liquid that increases or decreases resistance. For example, the liquid that increases resistance may be a relatively viscous oil. The liquid that reduces resistance may be a lubricating oil. Preferably, referring to fig. 3, the communication module 20 further comprises a power generation unit 22. The power generating unit 22 can change the resistance when the rod body 420 or the pump rod moves. Preferably, the communication module 20 may also determine/recognize the motion state of the stick body 420 through the power generation unit 22, and may also convert the motion of the stick body 420 into electric energy. Specifically, referring to fig. 2, 4 and 5, the lever body 420 is connected with the pump barrel 13. The lever 420 can drive the pump barrel 13 to move in a first direction or a second direction. Preferably, the pump barrel 13 is provided with a connecting rod at a side opposite to the rod body 420. The connecting rod may be a pump rod. The connecting rods extend into the telecommunications module 20. Referring to fig. 2, the part of the connecting rod entering the power generating unit 22 of the communication module 20 is a lead screw 421. Referring to fig. 5, the lead screw 421 is provided with a groove 214. The groove 214 is provided in a manner spirally surrounding the lead screw 421. Preferably, the screw 421 can be a trapezoidal screw, i.e. the groove 214 is trapezoidal in the cross section along the axial direction of the screw 421. Referring again to fig. 5, the power generation unit 22 includes a stator 207 and a rotor 212. The rotor 212 is disposed in the stator 202. The stator 207 serves to generate a rotating magnetic field. The lead screw 421 is sleeved in the rotor 212. The side of the rotor 212 facing the lead screw 421 is provided with a convex body 215. The projection 215 can extend into the groove 214. With this arrangement, the rotor 212 can be rotated when the lead screw 421 moves in the first/second direction. The rotation of the rotor 212 can cut the magnetic field generated by the stator 207, thereby generating electrical energy. Specifically, when the screw 421 moves in the first direction/the second direction, the convex body 215 of the rotor 212 can slide/roll along the groove 214 spirally disposed on the screw 421, so that the rotor 212 is rotated about the axis thereof by the convex body 215.

Preferably, the communication module 20 or the processing unit 21 may be configured to increase the load of the generator so that the power of the generator becomes larger, thereby increasing the resistance when the lead screw 421 moves. Through the arrangement, the power generation unit 22 can change the resistance borne by the rod body 420 or the pump rod, so that the load of the oil pumping equipment 400 is increased, and further, the information transmission is realized. Specifically, the communication module 20 or the processing unit 21 transmits information through the resistance element or the power generation unit 22 in a manner similar to the transmission of information through the valve body 24, requiring the transmission of a start signal, data type and data, except that changes in the load of the oil well pumping unit 400 can be applied during the up stroke and down stroke of the oil well pumping unit 400, respectively. Referring to fig. 8, when the communication module 20 or the processing unit 21 transmits "1", the load may be increased by the resistance member or the power generation unit 22 in a down stroke or an up stroke and then restored to a normal load, so that the resistance of the lever body 420 is suddenly increased and then restored to a normal state. Likewise, the communication module 20 or the processing unit 21 may be configured to control the resistance or power generation unit 22 multiple times for multiple bit transfers during a single down-stroke or up-stroke time period.

The structure of a preferred embodiment of the communication module 20 is preferably as shown in fig. 4. The communication module 20 includes a circuit cartridge 202. The internal components of the communication module 20 are disposed within the circuit housing 202. The telecommunications module 20 further comprises an upper connector 201. The upper joint 201 is used for connecting with the oil pipe 600 or with the inner wall of the pump body 10. The other end of the upper connector 210 is connected to the circuit outer cylinder 202. . The upper joint 201 is provided with a thread passing rod 203 along the second direction. The upper joint 201 is provided with a thread-through rod 203 in a direction toward the bottom of the well. The wire-passing rod 203 is used for passing through and sealing cables in the communication module 20. One end of the thread passing rod 203 is connected to the upper joint 201. The other end of the threading rod 203 is connected with the circuit isolation cylinder 204. . A control valve assembly 216 is disposed in the communication module 20 on a side opposite to the wire-passing rod 203. The control valve assembly 216 is used to control flow or shut-off. The control valve assembly 216 is connected to the upper connector 210 at one end and to the circuit isolation cartridge 204 at the other end. . The side of the threading rod 203 facing the well bottom is provided with a circuit isolation cylinder 204. The circuit isolation cylinder 204 is hermetically connected with the circuit outer cylinder 202. The hollow portion of the circuit isolation cylinder 204 can form an enclosed space. A circuit board is arranged in the closed space. The enclosed space inside the circuit isolation cylinder 204 can isolate the liquid flow and make a circuit board. The side of the circuit isolation cylinder 204 facing the bottom of the well is provided with an intermediate joint 205. The circuit isolation cylinder 204 is hermetically connected with an intermediate joint 205. The intermediate connector 205 is detachably connected to the circuit outer housing 202. The removable means may be a threaded connection, welding, hinging, snap-fit connection, etc. The intermediate coupling 205 is detachably connected to the generator housing 208. The intermediate connection 205 is used to connect the power generation unit 22 with the flow regulating control valve assembly 216 and for cable transit. The side of the intermediate joint 205 facing the bottom of the well is provided with an inner battery barrel 206. The battery inner tube 206 is used for placing the built-in battery 29. The side of the battery inner barrel 206 facing the well bottom is provided with a generator housing 208. The generator housing 208 has the power generation unit 22 disposed therein. The power generation unit 22 surrounds the lead screw 421. The power generation unit 22 includes a stator 207 and a rotor 212. Preferably, the inner battery can 206 has one end connected to the intermediate connector 205 and the other end connected to the stator 207. Preferably, the battery inner barrel 206 can serve as a central passage for fluid, isolate fluid flow, and hold the internal battery 29. Preferably, rotor 212 is coupled to stator 207 by first bearing outer ring 210 and second bearing outer ring 211. One end of the rotor 212 is hinged to the stator 207 through a first bearing outer ring 210, and the other end is hinged to the stator 207 through a second bearing outer ring 211. The side of the second bearing outer ring 211 opposite the rotor 212 is connected to a bearing joint 213. The end of the bearing adapter 213 opposite the second bearing outer ring 211 is connected to the lower adapter 209. The lower joint 209 is connected to the generator housing 208 at one end and to the oil pipe 600 at the other end. The lower joint 209 is used to fix the power generation unit 22.

According to another preferred embodiment, the outer side of the lead screw 421 is provided with a helical protrusion, e.g. a thread. A groove is formed on one side of the rotor 212 facing the lead screw 421. The protrusion of the lead screw 421 can be engaged with the groove of the rotor 212. The groove of the rotor 212 can slide/roll along the protrusion of the lead screw 421. With this arrangement, in the case where the lead screw 421 moves in the first/second direction, the lead screw 421 can drive the groove body to slide/roll along the protrusion by the protrusion, so that the rotor 212 rotates.

encoding the monitoring data according to a preset encoding mode;

if the rod 420 is not in motion for transmitting information;

the valve body 204 is controlled to open/close based on the coded command.

The present specification encompasses multiple inventive concepts and the applicant reserves the right to submit divisional applications according to each inventive concept. The present description contains several inventive concepts, such as "preferably", "according to a preferred embodiment" or "optionally", each indicating that the respective paragraph discloses a separate concept, the applicant reserves the right to submit divisional applications according to each inventive concept.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. Wireless communication oil recovery device, its characterized in that includes:

the pump body (10) is used for lifting the underground fluid to the ground and is connected with the oil pumping equipment (400) through the rod body (420);

a communication module (20) located inside the pump body (10) and configured to:

modulating information into the load fluctuation of the oil pumping equipment (400) in a manner of controlling the communication/blocking between the inside and the outside of the pump body (10) so as to change the acting force applied to the rod body (420) by the pump body (10),

the pump body (10) comprises a pump barrel (13), a first valve (11) and a second valve (12), wherein,

one side of the pump barrel (13) is connected with the rod body (420), the other side is provided with the first valve (11),

an oil outlet chamber (14) is formed between the first valve (11) and the second valve (12);

the communication module (20) is arranged in the oil outlet chamber (14), and the communication module (20) is communicated with an oil drainage port (15),

the communication module (20) comprises a processing unit (21) and a motor (25), wherein,

the processing unit (21) is configured to modulate information in the fluctuation of the suspension point load of the rod body (420) or the power fluctuation of the oil pumping equipment (400) in a mode that a driving motor (25) can be used for adjusting the opening degree of the valve body (24) so as to change the acting force of the pump body (10) on the rod body (420),

under the condition that the inside of the pump body (10) is blocked/isolated from the outside, a pump barrel (13) of the pump body (10) moves along a first direction and a second direction under the driving of an oil pumping device (400) so as to lift crude oil in an oil layer (300) to the ground, the load of the oil pumping device (400) is the self weight of the pump body (10) and sucked fluid,

under the condition that the interior of the pump body (10) is communicated with the exterior, the pump barrel (13) moves along the second direction, and due to the fact that the oil outlet chamber (14) is communicated with the annular space (510) of the exterior, the pressure of the oil outlet chamber (14) is reduced, the first valve (11) cannot be opened, and therefore fluid cannot flow into the pump barrel (13), the load of the oil pumping equipment (400) is the pressure difference between the pump barrel (13) and the exterior of the pump body (10), so that the acting force borne by the rod body (420) is increased, the load of a suspension point of the rod body (420) is increased, the acting force borne by the oil pumping equipment (400) is correspondingly increased, the current of a lifting motor of the oil pumping equipment (400) is increased, and the power of the oil pumping equipment (400) is increased;

the communication module (20) is fixed in the pump body (10), and a first pipe body (27) in the communication module (20) is communicated with the oil drainage port (15);

the communication module (20) is provided with a second pipe body (28), the second pipe body (28) is used for passing fluid, and the second pipe body (28) is used for communicating two parts of the oil outlet chamber (14) which are separated by the communication module (20);

the communication module (20) enables the interior of the pump body (10) to be communicated with the exterior or blocked off through the valve body (24), the valve body (24) is arranged at the communication position between the interior and the exterior of the pump body (10), and the side wall of the pump body (10) is provided with an oil drainage opening (15).

2. Wireless communication oil recovery device, its characterized in that includes:

the pump body (10) is arranged underground and is connected with the oil pumping equipment (400) through a rod body (420);

a communication module (20) arranged inside the pump body (10) and comprising a resistance element directly or indirectly connected to the rod (420);

the communication module (20) is configured to control the resistance element to change the acting force borne by the rod body (420) when the rod body moves so as to transmit information/data in a mode of changing the load of the oil pumping equipment (400),

under the condition that the interior of the pump body (10) is communicated with the exterior, the pump barrel (13) moves along the second direction, and due to the fact that the oil outlet chamber (14) is communicated with the annular space (510) of the exterior, the pressure of the oil outlet chamber (14) is reduced, the first valve (11) cannot be opened, and fluid cannot flow into the pump barrel (13), the load of the oil pumping equipment (400) is the pressure difference between the pump barrel (13) and the exterior of the pump body (10), so that the acting force borne by the rod body (420) is increased, the load of the suspension point of the rod body (420) is increased, the acting force borne by the oil pumping equipment (400) is correspondingly increased, the current of a lifting motor of the oil pumping equipment (400) is increased, and the power of the oil pumping equipment (400) is increased;

3. Wireless communication oil recovery device, its characterized in that includes:

the pump body (10) is driven by the oil pumping equipment (400) to reciprocate along with the rod body (420);

a communication module (20) arranged inside the pump body (10) and comprising a power generation unit (22) directly or indirectly connected to the rod body (420);

wherein the content of the first and second substances,

the reciprocating motion of the rod body (420) can drive the rotor (212) in the power generation unit (22) to rotate to generate electric energy;

the communication module (20) is configured to determine or identify a motion state of the rod body (420) based on the power generation unit (22); or alternatively

The communication module (20) is configured to transmit information/data in a mode of changing the acting force borne by the rod body (420) when the rod body (420) moves through a power generation unit (22) so as to change the load of the oil pumping equipment (400),

4. The wireless communication oil production device according to any of claims 1 to 3, wherein the pump body (10) is sleeved in a casing (500) of the downhole (200), and one side of the pump body (10) connected with the rod body (420) is connected with the oil pipe (600), or

The pump body (10) is sleeved in an oil pipe (600), and the oil pipe (600) is sleeved in the sleeve (500);

wherein the content of the first and second substances,

an annulus (510) is formed between the casing (500) and the oil pipe (600);

the pump body (10) is provided with an oil drainage port (15) communicated with the annular space (510).

5. The wireless communication oil recovery device according to any of the preceding claims 1 to 3, characterized in that a valve body (24) is arranged at the oil drain (15) and/or the communication module (20) in communication with the oil outlet chamber (14).

6. The wireless communication oil recovery device according to any one of claims 1 to 3, characterized in that the communication module (20) comprises an electricity generating unit (22), wherein,

a pump barrel (13) driven by a rod body (420) in the pump body (10) is connected with a lead screw (421) capable of entering the power generation unit (22);

or the part of the rod body (420) penetrating through the pump barrel (13) is connected with a lead screw (421) capable of entering the power generation unit (22);

wherein:

when the lead screw (421) moves in the first direction/the second direction, the rotor (212) of the power generation unit (22) is arranged in a manner of rotating around the axis of the rotor under the driving of the lead screw (421).

7. The wireless communication oil recovery device according to any of claims 1 to 3, characterized in that the communication module (20) is configured to perform the steps of:

acquiring monitoring data;

encoding the monitoring data according to a preset encoding mode;

controlling the opening/closing of the valve body (24) based on the coded command;

or the power generation unit (22) is controlled to increase the load based on the coded instruction so as to change the acting force borne by the rod body (420) during movement.

8. A method of wirelessly communicating oil recovery devices according to any one of claims 1 to 7 for uploading downhole data to the surface, the method comprising:

changes the acting force born by the rod body (420) when in motion so as to transmit information or data in a mode of changing the load of the oil pumping equipment (400),

the information is modulated in the fluctuation of the suspension point load of the rod body (420) or the power fluctuation of the oil pumping equipment (400) in a mode that the opening degree of the valve body (24) can be adjusted by a driving motor (25) so as to change the acting force of the pump body (10) on the rod body (420),

under the condition that the inside of the pump body (10) is blocked/isolated from the outside, the load of the oil pumping equipment (400) is the self weight of the pump body (10) and sucked fluid,

under the condition that the interior of the pump body (10) is communicated with the exterior, the load of the oil pumping equipment (400) is the pressure difference between a pump barrel (13) of the pump body (10) and the exterior of the pump body (10).