CN116464409A - Drilling fluid channel pressure control system and method based on wireless short-pass communication - Google Patents
Drilling fluid channel pressure control system and method based on wireless short-pass communication Download PDFInfo
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- CN116464409A CN116464409A CN202211673822.7A CN202211673822A CN116464409A CN 116464409 A CN116464409 A CN 116464409A CN 202211673822 A CN202211673822 A CN 202211673822A CN 116464409 A CN116464409 A CN 116464409A
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- 238000005553 drilling Methods 0.000 title claims abstract description 218
- 239000012530 fluid Substances 0.000 title claims abstract description 195
- 230000006854 communication Effects 0.000 title claims abstract description 48
- 238000004891 communication Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 130
- 238000001514 detection method Methods 0.000 claims abstract description 128
- 210000002445 nipple Anatomy 0.000 claims abstract description 70
- 230000008859 change Effects 0.000 claims abstract description 28
- 238000005259 measurement Methods 0.000 claims description 43
- 239000010720 hydraulic oil Substances 0.000 claims description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 15
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- 230000008054 signal transmission Effects 0.000 description 6
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- 230000007246 mechanism Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000003079 shale oil Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
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- 238000013459 approach Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
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Abstract
The invention discloses a drilling fluid flow channel pressure control system and method based on wireless short-pass communication. The system comprises: the pressure detection unit is arranged at a designated position of the drilling fluid flow channel and is used for detecting the pressure of the drilling fluid flow channel at the position; the wireless short transmission transmitting nipple is used for transmitting the drilling fluid runner pressure data to the wireless short transmission receiving nipple, and the wireless short transmission receiving nipple is used for transmitting the drilling fluid runner pressure data to the closed-loop regulation control circuit through the MWD system; and/or the wireless short transmission transmitting nipple transmits drilling fluid runner pressure data to the closed-loop adjusting control circuit; and the closed-loop regulation control circuit is used for generating a control signal according to the drilling fluid channel pressure data, controlling the hydraulic pushing block unit to change the position of the pushing block so as to change the drilling fluid channel area and regulate the drilling fluid channel pressure. The pressure of the drilling fluid channel can be regulated in real time, and the condition of drilling fluid pressure transmitted by mud pressure wave pulse signals is maintained.
Description
Technical Field
The invention relates to the technical field of petroleum drilling engineering, in particular to a drilling fluid flow channel pressure control system and method based on wireless short-circuit communication.
Background
With deep development of deep complex oil and gas resources such as shale oil and gas, a deeper and longer horizontal well borehole track needs to be drilled in a reservoir, the underground stratum environment of unconventional complex oil and gas resources such as shale oil and gas is complex, near-bit geosteering drilling instruments are required to perform drilling operation, and the borehole track is ensured to pass through the reservoir by detecting geological structure and lithology characteristic changes in the reservoir and adopting corresponding adjustment measures.
When the geosteering instrument works in a complex underground environment, in order to enable the ground drilling fluid pump to adapt to pressure change in a shaft, a flow limiting ring is usually arranged at a drilling fluid pressure pulse generator in the shaft to change the drilling fluid pressure in the shaft to adjust the displacement, so that the sent coded pulse signals are seriously attenuated, various geological and engineering parameters which are measured in real time in the shaft are difficult to accurately detect and effectively demodulate by a pressure sensor and a drilling fluid pressure wave coded pulse demodulation circuit system positioned on the ground, and therefore the current borehole track cannot be ensured to pass through a reservoir, and the drilling meeting rate of a high-quality reservoir cannot be effectively ensured.
For example: the Chinese patent of the utility model with the publication number of 212642705U discloses a inclinometer while drilling, which comprises a directional probe, wherein a pulse driving assembly is connected below the directional probe, a main valve head is arranged at the bottom end of the pulse driving assembly, a circulating sleeve is arranged outside the main valve head, and a flow limiting ring is arranged inside the lower end of the circulating sleeve. The application method of the restriction ring in the patent is a traditional and typical method in the field, before the instrument is put into a shaft, restriction rings with different specifications and sizes are used near the mushroom head position of the drilling fluid pressure wave pulser according to the displacement parameters of a ground drilling fluid pump, and the ratio of the restriction rings is changed to adjust the flow passage area of the drilling fluid so as to generate drilling fluid pressure conditions suitable for mud pressure wave pulse signal communication transmission.
In the prior art, the realization scheme of changing the drilling fluid pressure in the shaft to adjust the displacement by installing the flow limiting ring can not effectively solve the problem that the drilling fluid in the shaft is changed due to the underground pressure change in the complex stratum, so that the drilling fluid pressure condition suitable for mud pressure wave pulse signal transmission is destroyed, and the pressure sensor on the ground and the drilling fluid pressure wave coding pulse demodulation circuit system can not effectively detect and demodulate underground real-time measurement geological and engineering information.
Disclosure of Invention
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a system and method for controlling wellbore fluid flow path pressure based on wireless short-range communication that overcomes or at least partially solves the above problems.
The embodiment of the invention provides a drilling fluid channel pressure control system based on wireless short-circuit communication, which comprises the following components: the device comprises a hydraulic pushing block unit, a wireless short transmission communication unit, a pressure detection unit and a closed-loop regulation control circuit;
the pressure detection unit is arranged at a designated position of the drilling fluid flow channel and is used for detecting the pressure of the drilling fluid flow channel at the position;
the wireless short transmission communication unit comprises wireless short transmission short sections and wireless short transmission receiving short sections which are positioned at two sides of the screw motor, wherein the wireless short transmission short sections are used for transmitting the drilling fluid runner pressure data to the wireless short transmission receiving short sections, and the wireless short transmission receiving short sections are used for transmitting the drilling fluid runner pressure data to the closed-loop regulation control circuit through the MWD system; and/or the wireless short transmission transmitting nipple transmits the drilling fluid runner pressure data to a closed-loop adjusting control circuit;
The closed-loop adjusting control circuit is used for generating a control signal according to the drilling fluid flow passage pressure data and controlling the hydraulic pushing block unit to change the position of the pushing block so as to change the area of the drilling fluid flow passage and adjust the pressure of the drilling fluid flow passage.
In some alternative embodiments, the hydraulic push block unit includes: the device comprises a first pushing block, a second pushing block, a flow control unit and a power supply unit;
the power supply unit supplies power to the hydraulic pump, and the hydraulic pump presses the hydraulic oil in the hydraulic cylinder into a branch pipeline connected with the first pushing block and the second pushing block;
the flow control unit controls the working pressure in each branch pipeline to control the distance between the first pushing block and the pushing block.
In some alternative embodiments, the power providing unit includes a brushless dc motor, a gear reducer, and a hydraulic power source;
the brushless direct current motor is connected with the gear reducer, the gear reducer is connected with the hydraulic power source, the hydraulic power source is connected with the first pushing block and the second pushing block through branch pipelines, and power is provided for the first pushing block and the second pushing block of the pushing block to enable the first pushing block and the second pushing block to move.
In some alternative embodiments, the flow control unit includes a flow control valve, a throttle valve, and a relief valve;
the flow control valves are arranged in the branch pipelines from the hydraulic power source to the first pushing block and the branch pipelines from the hydraulic power source to the second pushing block so as to control the flow of hydraulic oil in the branch pipelines;
the hydraulic power source is connected with the first pushing block through a branch pipeline, and the hydraulic power source is connected with the second pushing block through a branch pipeline;
and an overflow valve is externally connected with an outlet pipeline of the hydraulic power source so as to control the pressure and flow of hydraulic oil extruded by the hydraulic power source and keep constant pressure and flow of the extruded hydraulic oil.
In some alternative embodiments, the pressure detection unit includes:
the first pressure detection sensor and the first pressure detection circuit are arranged between the drill bit and the screw motor drilling tool and are used for collecting real-time pressure data of a drilling fluid flow channel at the position, and the real-time pressure data are sent to the wireless short transmission receiving short section through the wireless short transmission transmitting short section;
the second pressure detection sensor and the second pressure detection circuit are arranged above the pulse generator and are used for collecting real-time pressure data of the drilling fluid flow channel at the position and sending the real-time pressure data to the closed-loop regulation control circuit.
In some alternative embodiments, the closed loop regulation control circuit is specifically configured to:
according to the drilling fluid flow channel pressure data sent by the first pressure detection circuit and the second pressure detection circuit;
judging whether the pressure difference value of the drilling fluid flow channel at the position of the first pressure detection sensor and the position of the second pressure detection sensor is larger than a preset first pressure difference threshold value and smaller than a preset second pressure difference threshold value;
and if the pressure difference is larger than a preset first pressure difference threshold, generating a control signal to control the pushing block in the hydraulic pushing block unit to move outwards, and increasing the drilling fluid flow passage area to reduce the drilling fluid flow passage pressure at the position where the second pressure detection sensor is located.
And if the pressure difference is smaller than a preset second pressure difference threshold value, a control signal is generated to control the pushing block in the hydraulic pushing block unit to move inwards, so that the drilling fluid flow passage area is reduced to increase the drilling fluid flow passage pressure at the position where the second pressure detection sensor is located.
In some alternative embodiments, the wireless short-transmission receiving nipple is provided in an MWD system.
The embodiment of the invention provides a drilling fluid flow channel pressure control method, which comprises the following steps:
a pressure detection unit arranged at a designated position of the drilling fluid flow channel detects the pressure of the drilling fluid flow channel at the position;
The wireless short transmission transmitting nipple sends the drilling fluid runner pressure data to a wireless short transmission receiving nipple, and the wireless short transmission receiving nipple sends the drilling fluid runner pressure data to a closed-loop regulation control circuit through an MWD system; and/or the wireless short transmission transmitting nipple transmits the drilling fluid runner pressure data to a closed-loop adjusting control circuit;
and the closed-loop adjusting control circuit generates a control signal according to the drilling fluid flow passage pressure data to control the hydraulic pushing block unit to change the position of the pushing block so as to change the drilling fluid flow passage area and adjust the drilling fluid flow passage pressure.
In some alternative embodiments, the closed loop adjustment control circuit generates a control signal according to the drilling fluid flow path pressure data, controls the hydraulic pushing block unit to change the position of the pushing block to change the drilling fluid flow path area to adjust the drilling fluid flow path pressure, and includes:
according to the drilling fluid flow channel pressure data sent by the first pressure detection circuit and the second pressure detection circuit;
judging whether the pressure difference value of the drilling fluid flow channel at the position of the first pressure detection sensor and the position of the second pressure detection sensor is larger than a preset first pressure difference threshold value and smaller than a preset second pressure difference threshold value;
If the pressure difference is larger than a preset first pressure difference threshold, a control signal is generated to control a pushing block in the hydraulic pushing block unit to move outwards, so that the area of a drilling fluid flow channel is increased to reduce the pressure of the drilling fluid flow channel at the position where the second pressure detection sensor is located;
and if the pressure difference is smaller than a preset second pressure difference threshold value, a control signal is generated to control the pushing block in the hydraulic pushing block unit to move inwards, so that the drilling fluid flow passage area is reduced to increase the drilling fluid flow passage pressure at the position where the second pressure detection sensor is located.
The embodiment of the invention provides a transmission system based on wireless short-circuit communication, which comprises the following steps: the system comprises a measuring unit, a wireless short transmission communication unit, a screw motor drilling tool and an MWD system;
the measuring unit is used for acquiring measurement data, wherein the measurement data comprise measured near-bit geological engineering parameters and/or detected drilling fluid flow passage pressure data;
the wireless short transmission communication unit comprises wireless short transmission short sections and wireless short transmission receiving short sections, wherein the wireless short transmission short sections and the wireless short transmission receiving short sections are positioned at two sides of the screw motor drilling tool, the wireless short transmission short sections are used for transmitting the measurement data to the wireless short transmission receiving short sections, the wireless short transmission receiving short sections are positioned inside the MWD system and used for transmitting the measurement data to the MWD system, and the MWD system is used for transmitting the measurement data to the ground and/or a closed-loop adjusting control circuit.
In some alternative embodiments, the measurement unit comprises a measurement nipple and/or a pressure detection unit;
the measuring nipple is used for measuring near-bit geological engineering parameters, and the pressure detection unit is used for detecting pressure data of a drilling fluid channel;
the pressure detection unit comprises a pressure detection sensor and a pressure detection circuit, wherein the pressure detection circuit is used for acquiring data of the pressure detection sensor so as to acquire drilling fluid flow passage pressure data of the position where the pressure detection sensor is located and sending the drilling fluid flow passage pressure data to the wireless short transmission short section.
The embodiment of the invention provides a transmission method based on wireless short-range communication, which comprises the following steps:
the measuring unit obtains measurement data, wherein the measurement data comprise measured near-bit geological engineering parameters and/or detected drilling fluid flow passage pressure data;
the wireless short transmission transmitting nipple sends the measurement data to a wireless short transmission receiving nipple, and the wireless short transmission receiving nipple is positioned in an MWD system;
the wireless short transmission receiving nipple sends the measurement data to an MWD system;
the MWD system sends measurement data to surface and/or closed loop conditioning control circuitry.
The embodiment of the invention provides a drilling tool, which is provided with the drilling fluid flow channel pressure control system based on wireless short-circuit communication and/or the transmission system based on wireless short-circuit communication.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
according to the drilling fluid channel pressure control system based on wireless short-pass communication, provided by the embodiment of the invention, the pressure of the drilling fluid channel at the designated position of the drilling fluid channel is detected through the pressure detection unit, and is sent to the closed-loop regulation control circuit through the MWD system through the wireless short-pass transmitting nipple and the wireless short-pass receiving nipple which are positioned at the two sides of the screw motor, and/or the pressure detection unit is used for sending the pressure data of the drilling fluid channel to the closed-loop regulation control circuit; the closed-loop adjusting control circuit generates a control signal according to the drilling fluid flow channel pressure data to control the hydraulic pushing block unit to change the position of the pushing block so as to change the drilling fluid flow channel area and adjust the drilling fluid flow channel pressure. Therefore, the drilling fluid pressure can be adjusted in real time according to the real-time pressure condition of the drilling fluid flow channel, the drilling fluid flow channel pressure can be timely adjusted to be in a proper range for the conditions of drilling fluid change in a shaft caused by underground pressure change in a complex stratum, so that the drilling fluid pressure condition of mud pressure wave pulse signal transmission is maintained, underground data can be effectively transmitted to the ground and correctly demodulated by ground receiving equipment, and the accuracy and the effectiveness of data transmission are ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram of a transmission system based on wireless short-range communication according to a first embodiment of the present invention;
fig. 2 is a flowchart of a transmission method based on wireless short-range communication in the first embodiment of the present invention;
FIG. 3 is a schematic diagram of a drilling fluid flow path pressure control system based on wireless short-circuit communication in a second embodiment of the present invention;
FIG. 4 is a flow chart of a method for controlling pressure of a drilling fluid flow channel based on wireless short-circuit communication in a second embodiment of the invention;
FIG. 5 is a flow chart of a closed loop pressure control system for a drilling fluid flow path in accordance with a second embodiment of the present invention;
FIG. 6 is a schematic diagram of a hydraulic circuit of a push block unit in accordance with an embodiment of the present invention;
fig. 7 is a schematic mechanical structure of the pushing block according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to solve the problems, the embodiment of the invention provides a drilling fluid channel pressure control system based on wireless short-pass communication, a transmission system based on wireless short-pass communication and a related method.
According to the transmission system based on wireless short transmission communication, the wireless short transmission receiving nipple is arranged in the measurement while drilling (Measure While Drilling, MWD) system, and the structure of the wireless short transmission receiving nipple arranged in the MWD system is integrated, so that the structure is more compact, compared with the structure arranged between the MWD system and a screw motor drilling tool, the structure is simpler, the time consumption for searching fault points can be greatly reduced, and the workload of well descending operation is reduced.
According to the drilling fluid flow channel pressure control system based on wireless short-pass communication, in the working process of the near-bit geosteering drilling instrument, the pushing block unit can be controlled to change the position of the pushing block according to the real-time pressure of the drilling fluid flow channel, the area of the drilling fluid flow channel is controlled through the pushing block, the real-time pressure of the drilling fluid flow channel is realized, the drilling fluid pressure condition of mud pressure wave pulse signal communication transmission is guaranteed, and therefore a ground pressure sensor and a drilling fluid pressure wave coding pulse demodulation circuit system can effectively monitor and demodulate geological and engineering information measured underground in real time, and the drilling meeting rate of a high-quality reservoir is effectively guaranteed.
Example 1
An embodiment of the present invention provides a transmission system based on wireless short-range communication, whose structure is shown in fig. 1, including: a measurement unit, a wireless short-pass communication unit, a screw motor drilling tool 31 and an MWD system 41.
The measuring unit is used for acquiring measurement data, wherein the measurement data comprise measured near-bit geological engineering parameters and/or detected drilling fluid channel pressure data.
The wireless short transmission communication unit comprises a wireless short transmission short section 21 and a wireless short transmission receiving short section 22 which are positioned at two sides of the screw motor drilling tool 31, the wireless short transmission short section 21 is used for transmitting measurement data to the wireless short transmission receiving short section 22, the wireless short transmission receiving short section 22 is positioned inside the MWD system and used for transmitting the measurement data to the MWD system 41, and the MWD system 41 transmits the measurement data to the ground and/or a closed-loop adjustment control circuit.
Optionally, the measuring unit includes a measuring nipple 11 and/or a pressure detecting unit, the measuring nipple 11 is used for measuring near-bit geological engineering parameters, and the pressure detecting unit is used for detecting pressure data of the drilling fluid flow channel. The pressure detection unit comprises a pressure detection sensor 12 and a pressure detection circuit 61, wherein the pressure detection circuit 61 is used for acquiring data of the pressure detection sensor to acquire drilling fluid flow passage pressure data at the position of the pressure detection sensor 12 and sending the drilling fluid flow passage pressure data to the wireless short transmission short joint 21.
Referring to fig. 1, the system is an integrated multifunctional underground ground information telemetry system, which is sequentially and coaxially provided with a measuring nipple 11, a wireless short transmission transmitting nipple 21, a screw motor drilling tool 31 and an MWD system 41 from left to right, wherein a wireless short transmission receiving nipple 22 is arranged in the MWD system 41, a pulse generator 51 is further arranged on the right of the MWD system 41, the pulse generator 51 can be a pressure wave pulse generator, and a current limiting ring 52 or a hydraulic pushing block unit is arranged on the left of the pulse generator 51. The hydraulic push block unit is not shown in fig. 1. The first pressure detection sensor 12 and the first pressure detection circuit 61 are arranged at the measuring nipple 11, the first pressure detection circuit 61 can send detection data of the first pressure detection sensor 12 to the wireless short transmission transmitting nipple 21, the wireless short transmission transmitting nipple 21 sends the data to the wireless short transmission receiving nipple 22, and the wireless short transmission receiving nipple 22 sends the data to the closed-loop regulation control circuit. A second pressure detection sensor 13 and a second pressure detection circuit 62 are arranged on the right side of the pulse generator 51, the second pressure detection circuit 62 can directly transmit the detection data of the second pressure detection sensor 13 to the closed-loop regulation control circuit, and a wireless short transmission short section (not shown in fig. 1) can also be arranged near the second pressure detection circuit 62 for transmitting the collected pressure data to the MWD system 41 for transmitting to the ground.
The near-bit measuring nipple 11 measures various geological engineering parameters of the near-bit, the first pressure detecting sensor 12 and the second pressure detecting sensor 13 measure the pressure of a drilling fluid flow channel at the near-bit in real time, and the measured data are transmitted in an electromagnetic wave mode.
The measurement data is sent by the antenna of the wireless short transmission transmitting nipple 21 near the drill bit, the wireless short transmission transmitting nipple 21 can transmit electromagnetic signals, and the electromagnetic signals can cross the screw motor drilling tool 31 to reach the MWD system 41, wherein the wireless short transmission receiving nipple 22 is positioned in the MWD system 41 and can receive the electromagnetic signals, the mechanical structures of the wireless short transmission receiving nipple 22 and the MWD system 41 are reasonably designed, and the wireless short transmission receiving nipple 22 and the MWD system 41 are integrated together, so that the whole structure is simpler, the finding of fault points is facilitated, and the time consumption of fault detection and the workload of underground operation are reduced. The receiving nipple 22 transmits measurement data to the MWD system 41 and uploads the measurement data to the closed-loop adjustment control circuit, or alternatively, the drilling fluid flow path pressure data may be uploaded to the closed-loop adjustment control circuit, and other parameters, such as near-bit geological engineering parameters, may continue to be transmitted to the surface in a pressure pulse fluctuation signal manner, and pressure sensors located at the surface detect and demodulate various downhole engineering geological parameters. Of course, the wellbore fluid flow path pressure data may also be uploaded to the surface.
The first embodiment of the present invention further provides a transmission method based on wireless short-circuit communication, which realizes data transmission through the transmission system based on wireless short-circuit communication, and the flow is shown in fig. 2, and includes:
step S101: the measurement unit obtains measurement data including measured near-bit geological engineering parameters and/or detected drilling fluid channel pressure data.
Step S102: the wireless short transmission transmitting nipple sends measurement data to the wireless short transmission receiving nipple, and the wireless short transmission receiving nipple is positioned inside the MWD system.
Step S103: the wireless short transmission receiving nipple sends the measurement data to the MWD system.
Step S104: the MWD system sends measurement data to surface and/or closed loop conditioning control circuitry.
According to the system and the method, the wireless short transmission receiving nipple is arranged in the MWD system, so that the whole structure of the drilling tool is more compact and simpler, and signal transmission is more reliable.
Example two
The second embodiment of the invention provides a drilling fluid channel pressure control system based on wireless short-pass communication, which can be used for performing closed-loop adjustment on the drilling fluid channel pressure, and has a structure shown in fig. 3, a working principle shown in fig. 4, and the system comprises: the hydraulic pushing block unit 53, the wireless short-circuit communication unit, the pressure detection unit and the closed-loop regulation control circuit 71.
The pressure detection unit is arranged at a designated position of the drilling fluid flow channel and is used for detecting the pressure of the drilling fluid flow channel at the position;
the wireless short transmission communication unit comprises wireless short transmission short sections and wireless short transmission receiving short sections which are positioned at two sides of the screw motor, wherein the wireless short transmission short sections are used for transmitting drilling fluid flow channel pressure data to the wireless short transmission receiving short sections, and the wireless short transmission receiving short sections transmit the drilling fluid flow channel pressure data to the closed-loop regulation control circuit through the MWD system; and/or the wireless short transmission transmitting nipple transmits the drilling fluid runner pressure data to a closed-loop adjusting control circuit;
the closed-loop adjusting control circuit generates a control signal according to the drilling fluid flow passage pressure data to control the hydraulic pushing block unit to change the position of the pushing block so as to change the area of the drilling fluid flow passage and adjust the pressure of the drilling fluid flow passage.
The pressure detection unit comprises a first pressure detection sensor 12 and a first pressure detection circuit 61 which are arranged between the drill bit and the screw motor drilling tool, and is used for collecting real-time pressure data of a drilling fluid flow channel at the position, and transmitting the real-time pressure data to a wireless short transmission receiving short section 22 through a wireless short transmission transmitting short section 21; the second pressure detection sensor 13 and the second pressure detection circuit 62, which are disposed above the pulse generator, are used for collecting real-time pressure data of the drilling fluid flow channel at the position and sending the real-time pressure data to the closed-loop adjustment control circuit 71. Optionally, the wireless short transmission receiving nipple is disposed inside the mechanical mechanism of the MWD system.
The following describes in detail the specific implementation flow of the drilling fluid flow channel pressure control system and method based on wireless short-circuit communication with reference to fig. 3-6.
Referring to fig. 3 and 4, the drilling fluid flow channel pressure control system based on wireless short transmission communication is coaxially provided with a measuring nipple 11, a wireless short transmission transmitting nipple 21, a screw motor drilling tool 31 and an MWD system 41 in sequence from left to right, a wireless short transmission receiving nipple 22 is arranged in the MWD system 41, a pulse generator 51 is further arranged on the right of the MWD system 41, the pulse generator 51 can be a pressure wave pulse generator, and a hydraulic pushing block unit 53 is arranged on the left of the pulse generator 51. A first pressure detection sensor 12 and a first pressure detection circuit 61 are arranged at the measuring nipple 11, a second pressure detection sensor 13 and a second pressure detection circuit 62 are arranged on the right side of the pulse generator 51,
in the system, the pressure detection unit is used for realizing pressure data acquisition of the drilling fluid flow channel, and the two pressure detection circuits are used for acquiring the pressure of the drilling fluid flow channel at the position where the two pressure detection sensors are located, wherein:
the pressure detection sensor comprises a first pressure detection sensor 12 and a second pressure detection sensor 13, wherein the first pressure detection sensor 12 is positioned at a position between the drill bit and the screw motor drilling tool, and the second pressure detection sensor 13 is positioned above the mushroom head in the pulse generator so as to measure the drilling fluid flow channel pressure at the position.
The pressure detection circuit includes a first pressure detection circuit 61 and a second pressure detection circuit 62. The first pressure detection circuit 61 is located at a position between the drill bit and the screw motor, and the second pressure detection circuit 62 is located above the mushroom head in the pulse generator, and collects the pressure values measured by the first pressure detection sensor 11 and the second pressure detection sensor 13.
The closed-loop adjusting control circuit is positioned above the mushroom head in the pulse generator and adjacent to the second pressure detection sensor 13, and generates a closed-loop control signal according to the measured values of the two pressure detection sensors, and controls the area of the drilling fluid flow passage through the hydraulic circuit.
In the system, the wireless short transmission communication unit hydraulically transmits measurement data, and comprises a near-bit wireless short transmission transmitting nipple 21 and a wireless short transmission receiving nipple 22, which are particularly used for transmitting, receiving and decoding near-bit drilling fluid pressure parameter information. Referring to the data communication process in fig. 4, the first pressure detection circuit 61 may send the detection data of the first pressure detection sensor 12 to the wireless short transmission nipple 21, the wireless short transmission nipple 21 sends the data in an electromagnetic wave transmission manner, the data is sent to the wireless short transmission nipple 22 across the screw motor, and the wireless short transmission nipple 22 sends the data to the closed-loop adjustment control circuit 71 via the WMD system. The second pressure sensing circuit 62 may communicate sensed data from the second pressure sensing sensor 13 directly to the closed loop adjustment control circuit 71, or a wireless short transmission nipple (not shown in fig. 3) may be provided adjacent the second pressure sensing circuit 62 for transmitting the collected pressure data to the MWD system 41 for communication to the surface. The closed-loop adjustment control circuit 71 controls the operation of the hydraulic pushing block according to the received measurement data, and realizes the control of the pressure at the second pressure detection sensor 13 through feedback control so as to realize the control of the pressure difference of the drilling fluid flow channel within a certain range.
In the system, a hydraulic pushing block mechanism is adopted to control drilling fluid pressure in a shaft so as to be beneficial to mud pressure wave pulse signal transmission, a pressure detection unit and a closed-loop regulation control circuit generate feedback signals from measurement data of the two pressure detection units, and the feedback signals are sent to the hydraulic pushing block unit so as to control the hydraulic pushing block unit to work.
In some alternative embodiments, referring to the schematic hydraulic circuit diagram of the push block unit shown in fig. 5, the hydraulic push block unit 53 includes: the device comprises a first pushing block, a second pushing block, a flow control unit and a power supply unit; the power supply unit supplies power to the hydraulic pump, and the hydraulic pump presses the hydraulic oil in the hydraulic cylinder into a branch pipeline connected with the first pushing block and the second pushing block; the flow control unit controls the working pressure in each branch pipeline to control the distance between the first pushing block and the pushing block, thereby controlling the flow passage area of drilling fluid to control the flow passage pressure.
The hydraulic pushing block unit mainly pushes the pushing block to move through a hydraulic system, the area of a drilling fluid flow channel is changed, the pushing block moves in a drill string in a small range, for example, when the drilling fluid flow channel pressure is in a set ideal pressure value range, the pushing block is almost free from displacement, for example, when the drilling fluid flow channel pressure is not in the set ideal pressure value range, the hydraulic system controls the pushing block to move, so that the overflow area of the drilling fluid flow channel is changed, and the pressure is changed. The hydraulic pushing block unit can adopt a throttle valve to control an oil return path, a branch pipeline connected with an inlet of the pushing block is used for bypass throttling, and the hydraulic cylinder is only provided with an oil inlet, so that the traditional installation of a rod cavity is avoided, the mechanical structural design is simplified, and the reliability of the pushing block is greatly improved; in addition, the system changes the working pressure by controlling the flow of the throttle valve, the pressure change gradually changes along with the flow, and the pressure control stability is improved.
Optionally, the power supply unit comprises a brushless direct current motor, a gear reducer and a hydraulic power source; the brushless direct current motor is connected with the gear reducer, the gear reducer is connected with the hydraulic power source, the hydraulic power source is connected with the first pushing block and the second pushing block through branch pipelines, and power is provided for the first pushing block and the second pushing block of the pushing block to enable the pushing block to move. The power source of the power supply unit is magnetic, and the hydraulic power source has the characteristics of constant pressure and constant flow, so as to supply power to slurry, and the underground hydraulic pump is rotated by the slurry power, so that the hydraulic pump can press hydraulic oil in an oil bag into each branch pipeline.
Optionally, the flow control unit includes a flow control valve, a throttle valve, and a relief valve;
flow control valves are arranged in branch pipelines from the hydraulic power source to the first pushing block and branch pipelines from the hydraulic power source to the second pushing block so as to control the flow of hydraulic oil in the branch pipelines;
a throttle valve is arranged on a branch pipeline from the hydraulic power source to the first pushing block and an oil return pipeline from the hydraulic power source to a branch pipeline of the second pushing block so as to control the working pressure of the branch pipeline; in order to make the throttle valve have the target pressure difference, the flow control valve needs to be regulated to change the flow in each branch pipeline so as to reach the pressure value required by each hydraulic cylinder, and the hydraulic oil flowing out of each part is collected into the oil bag so as to balance the pressure.
The outlet pipeline of the hydraulic power source is externally connected with an overflow valve to control the pressure and flow of the hydraulic oil extruded by the hydraulic power source, so that the extruded hydraulic oil can maintain constant pressure and flow. The overflow valve can control the extruded hydraulic oil to keep constant pressure, and the hydraulic power source driven by magnetic force can control the hydraulic pump to keep constant rotation speed so as to ensure that the pressure and flow of the hydraulic oil are kept constant.
Optionally, an oil filter may be disposed at the outlet line of the hydraulic power source, and an outlet line outside the overflow valve oil filter. Oil bags can be arranged below the hydraulic power source, below the overflow valve and below the dynamic seal of the throttle valve so as to recover the outflow hydraulic oil.
The mechanical structure of the pushing block is shown in fig. 6, the hydraulic pump is connected with the oil bag, hydraulic oil in the oil bag is conveyed into the oil cylinder through the oil pipe, the piston structure of the oil cylinder is pushed to extend or retract, the pushing block is pushed to extend or retract, the distance between the two pushing blocks is reduced or increased, the flow passage area of the hydraulic flow passage is changed to be reduced or increased, the flowing liquid is correspondingly reduced or increased, and the pressure of the hydraulic flow passage is increased or reduced.
In some alternative embodiments, the closed loop regulation control circuit is specifically configured to: according to drilling fluid flow channel pressure data sent by the first pressure detection circuit and the second pressure detection circuit; judging whether the pressure difference value of the drilling fluid flow channel at the position of the first pressure detection sensor and the position of the second pressure detection sensor is larger than a preset first pressure difference threshold value and smaller than a preset second pressure difference threshold value; if the pressure difference is larger than a preset first pressure difference threshold, a control signal is generated to control the pushing block in the hydraulic pushing block unit to move outwards, so that the drilling fluid flow passage area is increased to reduce the drilling fluid flow passage pressure at the position where the second pressure detection sensor is located. And if the pressure difference is smaller than a preset second pressure difference threshold value, a control signal is generated to control the pushing block in the hydraulic pushing block unit to move inwards, so that the drilling fluid flow passage area is reduced to increase the drilling fluid flow passage pressure at the position where the second pressure detection sensor is located.
The closed-loop regulation control circuit generates control signals according to drilling fluid flow channel pressure data, and controls pressure values of the pressure-pushing blocks flowing into the branch pipelines in the hydraulic circuit through the control signals to push the two side-pushing blocks to squeeze the drilling fluid flow channel to be flowed into the pressure wave pulse generator so as to control the area of the drilling fluid flow channel. The first pressure difference threshold and the second pressure difference threshold may be set as desired, with the first pressure difference threshold generally being greater than the second pressure difference threshold. For example, the first pressure difference threshold is 2MPa, the second pressure difference threshold is 1MPa, if the measured value of the second pressure detection unit minus the measured value of the first pressure detection unit is greater than 2MPa, the pressure applied to the pushing blocks at two sides is reduced, the two pushing blocks move outwards under the pushing of drilling fluid in the flow channel, the flow channel of the drilling fluid is widened, and the pressure value at the second pressure detection sensor is reduced; conversely, if the measured value of the second pressure detecting unit minus the measured value of the first pressure detecting unit is less than 1MPa, the pressure applied to the two side pushing blocks is increased, the two pushing blocks move inward, the drilling fluid flow path is narrowed, and the pressure value at the second pressure detecting sensor is increased. The pressure at the position of the second pressure detection sensor is adjusted through feedback control, so that the pressure difference at the positions of the two pressure detection sensors is kept between 1 and 2MPa, and the drilling fluid pressure condition suitable for mud pressure wave pulse signal transmission is ensured.
The second embodiment of the invention also provides a drilling fluid flow channel pressure control method based on wireless short-circuit communication, the flow of which is shown in fig. 5, comprising the following steps:
step S201: a pressure detecting unit provided at a specified position of the drilling fluid flow passage detects the drilling fluid flow passage pressure at the position.
Step S202: the wireless short transmission transmitting nipple sends the pressure data of the drilling fluid flow channel to the wireless short transmission receiving nipple, and the wireless short transmission receiving nipple sends the pressure data of the drilling fluid flow channel to the closed-loop regulation control circuit through the MWD system;
step S203: the closed-loop adjusting control circuit generates a control signal according to the drilling fluid flow channel pressure data to control the hydraulic pushing block unit to change the distance between the pushing blocks so as to adjust the drilling fluid flow channel pressure.
In the step, drilling fluid flow channel pressure data sent by a first pressure detection circuit and a second pressure detection circuit are used for detecting the pressure of a drilling fluid flow channel; judging whether the pressure difference value of the drilling fluid flow channel at the position of the first pressure detection sensor and the position of the second pressure detection sensor is larger than a preset first pressure difference threshold value and smaller than a preset second pressure difference threshold value; and if the pressure difference is larger than a preset first pressure difference threshold, generating a control signal to control the pushing block in the hydraulic pushing block unit to move outwards, and increasing the drilling fluid flow passage area to reduce the drilling fluid flow passage pressure at the position where the second pressure detection sensor is located. And if the pressure difference is smaller than a preset second pressure difference threshold value, a control signal is generated to control the pushing block in the hydraulic pushing block unit to move inwards, so that the drilling fluid flow passage area is reduced to increase the drilling fluid flow passage pressure at the position where the second pressure detection sensor is located.
In the above method, the relevant content has been described in the relevant part of the system, and will not be described here again.
The system is provided with the drilling fluid flow passage pressure closed-loop regulating circuit above the mushroom head in the mud pulse generator, and can realize self-adaptive dynamic closed-loop regulation of the drilling fluid flow passage area according to pressure change in a shaft, so that drilling fluid pressure conditions suitable for mud pressure wave pulse signal transmission are maintained.
Unless specifically stated otherwise, terms such as processing, computing, calculating, determining, displaying, or the like, may refer to an action and/or process of one or more processing or computing systems, or similar devices, that manipulates and transforms data represented as physical (e.g., electronic) quantities within the processing system's registers or memories into other data similarly represented as physical quantities within the processing system's memories, registers or other such information storage, transmission or display devices. Information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
It should be understood that the specific order or hierarchy of steps in the processes disclosed are examples of exemplary approaches. Based on design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not meant to be limited to the specific order or hierarchy presented.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus the following claims are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate preferred embodiment of this invention.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. The processor and the storage medium may reside as discrete components in a user terminal.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. These software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor, in which case it can be communicatively coupled to the processor via various means as is known in the art.
The foregoing description includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, as used in the specification or claims, the term "comprising" is intended to be inclusive in a manner similar to the term "comprising," as interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean "non-exclusive or".
Claims (13)
1. Drilling fluid flow path pressure control system based on wireless short-pass communication, characterized by comprising: the device comprises a hydraulic pushing block unit, a wireless short transmission communication unit, a pressure detection unit and a closed-loop regulation control circuit;
the pressure detection unit is arranged at a designated position of the drilling fluid flow channel and is used for detecting the pressure of the drilling fluid flow channel at the position;
The wireless short transmission communication unit comprises wireless short transmission short sections and wireless short transmission receiving short sections which are positioned at two sides of the screw motor, wherein the wireless short transmission short sections are used for transmitting the drilling fluid runner pressure data to the wireless short transmission receiving short sections, and the wireless short transmission receiving short sections are used for transmitting the drilling fluid runner pressure data to the closed-loop regulation control circuit through the MWD system; and/or the wireless short transmission transmitting nipple transmits the drilling fluid runner pressure data to a closed-loop adjusting control circuit;
the closed-loop adjusting control circuit is used for generating a control signal according to the drilling fluid flow passage pressure data and controlling the hydraulic pushing block unit to change the position of the pushing block so as to change the area of the drilling fluid flow passage and adjust the pressure of the drilling fluid flow passage.
2. The system of claim 1, wherein the hydraulic push block unit comprises: the device comprises a first pushing block, a second pushing block, a flow control unit and a power supply unit;
the power supply unit supplies power to the hydraulic pump, and the hydraulic pump presses the hydraulic oil in the hydraulic cylinder into a branch pipeline connected with the first pushing block and the second pushing block;
the flow control unit controls the working pressure in each branch pipeline to control the distance between the first pushing block and the pushing block.
3. The system of claim 2, wherein the power supply unit comprises a brushless dc motor, a gear reducer, and a hydraulic power source;
the brushless direct current motor is connected with the gear reducer, the gear reducer is connected with the hydraulic power source, the hydraulic power source is connected with the first pushing block and the second pushing block through branch pipelines, and power is provided for the first pushing block and the second pushing block of the pushing block to enable the first pushing block and the second pushing block to move.
4. The system of claim 2, wherein the flow control unit comprises a flow control valve, a throttle valve, and a relief valve;
the flow control valves are arranged in the branch pipelines from the hydraulic power source to the first pushing block and the branch pipelines from the hydraulic power source to the second pushing block so as to control the flow of hydraulic oil in the branch pipelines;
the hydraulic power source is connected with the first pushing block through a branch pipeline, and the hydraulic power source is connected with the second pushing block through a branch pipeline;
and an overflow valve is externally connected with an outlet pipeline of the hydraulic power source so as to control the pressure and flow of hydraulic oil extruded by the hydraulic power source and keep constant pressure and flow of the extruded hydraulic oil.
5. The system of claim 1, wherein the pressure detection unit comprises:
the first pressure detection sensor and the first pressure detection circuit are arranged between the drill bit and the screw motor drilling tool and are used for collecting real-time pressure data of a drilling fluid flow channel at the position, and the real-time pressure data are sent to the wireless short transmission receiving short section through the wireless short transmission transmitting short section;
the second pressure detection sensor and the second pressure detection circuit are arranged above the pulse generator and are used for collecting real-time pressure data of the drilling fluid flow channel at the position and sending the real-time pressure data to the closed-loop regulation control circuit.
6. The system of claim 1, wherein the closed loop regulation control circuit is specifically configured to:
according to the drilling fluid flow channel pressure data sent by the first pressure detection circuit and the second pressure detection circuit;
judging whether the pressure difference value of the drilling fluid flow channel at the position of the first pressure detection sensor and the position of the second pressure detection sensor is larger than a preset first pressure difference threshold value and smaller than a preset second pressure difference threshold value;
if the pressure difference is larger than a preset first pressure difference threshold, a control signal is generated to control a pushing block in the hydraulic pushing block unit to move outwards, so that the area of a drilling fluid flow channel is increased to reduce the pressure of the drilling fluid flow channel at the position where the second pressure detection sensor is located;
And if the pressure difference is smaller than a preset second pressure difference threshold value, a control signal is generated to control the pushing block in the hydraulic pushing block unit to move inwards, so that the drilling fluid flow passage area is reduced to increase the drilling fluid flow passage pressure at the position where the second pressure detection sensor is located.
7. The system of any of claims 1-6, wherein the wireless short-transmission receiving nipple is disposed in a MWD system.
8. A drilling fluid flow path pressure control method, comprising:
a pressure detection unit arranged at a designated position of the drilling fluid flow channel detects the pressure of the drilling fluid flow channel at the position;
the wireless short transmission transmitting nipple sends the drilling fluid runner pressure data to a wireless short transmission receiving nipple, and the wireless short transmission receiving nipple sends the drilling fluid runner pressure data to a closed-loop regulation control circuit through an MWD system; and/or the wireless short transmission transmitting nipple transmits the drilling fluid runner pressure data to a closed-loop adjusting control circuit;
and the closed-loop adjusting control circuit generates a control signal according to the drilling fluid flow passage pressure data to control the hydraulic pushing block unit to change the position of the pushing block so as to change the drilling fluid flow passage area and adjust the drilling fluid flow passage pressure.
9. The method of claim 1, wherein the closed loop adjustment control circuit generates a control signal based on the drilling fluid flow path pressure data to control the hydraulic push block unit to change the position of the push block to change the drilling fluid flow path area to adjust the drilling fluid flow path pressure, comprising:
according to the drilling fluid flow channel pressure data sent by the first pressure detection circuit and the second pressure detection circuit;
judging whether the pressure difference value of the drilling fluid flow channel at the position of the first pressure detection sensor and the position of the second pressure detection sensor is larger than a preset first pressure difference threshold value and smaller than a preset second pressure difference threshold value;
if the pressure difference is larger than a preset first pressure difference threshold, a control signal is generated to control a pushing block in the hydraulic pushing block unit to move outwards, so that the area of a drilling fluid flow channel is increased to reduce the pressure of the drilling fluid flow channel at the position where the second pressure detection sensor is located;
and if the pressure difference is smaller than a preset second pressure difference threshold value, a control signal is generated to control the pushing block in the hydraulic pushing block unit to move inwards, so that the drilling fluid flow passage area is reduced to increase the drilling fluid flow passage pressure at the position where the second pressure detection sensor is located.
10. A transmission system based on wireless short-range communication, comprising: the system comprises a measuring unit, a wireless short transmission communication unit, a screw motor drilling tool and an MWD system;
the measuring unit is used for acquiring measurement data, wherein the measurement data comprise measured near-bit geological engineering parameters and/or detected drilling fluid flow passage pressure data;
the wireless short transmission communication unit comprises wireless short transmission short sections and wireless short transmission receiving short sections, wherein the wireless short transmission short sections and the wireless short transmission receiving short sections are positioned at two sides of the screw motor drilling tool, the wireless short transmission short sections are used for transmitting the measurement data to the wireless short transmission receiving short sections, the wireless short transmission receiving short sections are positioned inside the MWD system and used for transmitting the measurement data to the MWD system, and the MWD system is used for transmitting the measurement data to the ground and/or a closed-loop adjusting control circuit.
11. The system of claim 10, wherein the measurement unit comprises a measurement nipple and/or a pressure detection unit;
the measuring nipple is used for measuring near-bit geological engineering parameters, and the pressure detection unit is used for detecting pressure data of a drilling fluid channel;
the pressure detection unit comprises a pressure detection sensor and a pressure detection circuit, wherein the pressure detection circuit is used for acquiring data of the pressure detection sensor so as to acquire drilling fluid flow passage pressure data of the position where the pressure detection sensor is located and sending the drilling fluid flow passage pressure data to the wireless short transmission short section.
12. A transmission method based on wireless short-range communication, comprising:
the measuring unit obtains measurement data, wherein the measurement data comprise measured near-bit geological engineering parameters and/or detected drilling fluid flow passage pressure data;
the wireless short transmission transmitting nipple sends the measurement data to a wireless short transmission receiving nipple, and the wireless short transmission receiving nipple is positioned in an MWD system;
the wireless short transmission receiving nipple sends the measurement data to an MWD system;
the MWD system sends measurement data to surface and/or closed loop conditioning control circuitry.
13. A drilling tool, characterized in that a drilling fluid flow path pressure control system based on wireless short-circuit communication according to any one of claims 1-7 and/or a transmission system based on wireless short-circuit communication according to any one of claims 10-11 is provided.
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| CN202211673822.7A CN116464409A (en) | 2022-12-26 | 2022-12-26 | Drilling fluid channel pressure control system and method based on wireless short-pass communication |
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| CN202211673822.7A CN116464409A (en) | 2022-12-26 | 2022-12-26 | Drilling fluid channel pressure control system and method based on wireless short-pass communication |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117868717A (en) * | 2024-03-12 | 2024-04-12 | 宝迈圣本测控技术(天津)有限公司 | Hollow oil-gas well flow pump working condition for high-temperature electric pump oil extraction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117868717A (en) * | 2024-03-12 | 2024-04-12 | 宝迈圣本测控技术(天津)有限公司 | Hollow oil-gas well flow pump working condition for high-temperature electric pump oil extraction |
| CN117868717B (en) * | 2024-03-12 | 2024-05-17 | 宝迈圣本测控技术(天津)有限公司 | Hollow oil-gas well monitoring shaft for high-temperature electric pump oil extraction |
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