CN212263922U - Oil well wellhead crude oil moisture content on-line monitoring instrument erasing device - Google Patents

Abstract

The utility model discloses an oil well wellhead crude oil moisture content on-line monitoring appearance erases device relates to oil industry measuring instrument technical field. The erasing device comprises an erasing head, an explosion-proof shell, an electric push rod, a micro motor and a control circuit board, wherein the electric push rod, the micro motor and the control circuit board are arranged in the explosion-proof shell; a travel limit switch is arranged in the electric push rod, the control circuit board can drive the micro motor to be electrified and operated, and then the micro motor drives the electric push rod to enable the erasing head connecting rod to drive the erasing head to do linear reciprocating motion; the oil passing channel is formed in the erasing head, the protective pipe is sleeved outside the erasing head connecting rod, an electric cable leading-out port and an opening used for fixing one end of the protective pipe are formed in the front anti-explosion end cover at the front end of the anti-explosion shell, and the other end of the protective pipe is provided with a butt joint used for being connected with an oil outlet pipeline. The device is used for the online monitor of the water content of crude oil matched with the erasing device at a single well mouth of an oil field, can automatically erase wax on the surface of the online monitor of the water content of crude oil at the well mouth, and improves the measurement precision of the online monitor of the water content of crude oil.

Description

Oil well wellhead crude oil moisture content on-line monitoring instrument erasing device

Technical Field

The utility model relates to a petroleum industry measuring instrument technical field, concretely relates to device is erased to oil well wellhead crude oil moisture content on-line monitoring appearance.

Background

The water content of the crude oil at the wellhead is important oil deposit data of the oil well, is also an important production parameter, and has important significance and practical value for determining the water and oil outlet layer position, estimating the yield, predicting the development life of the oil well, controlling the yield quality of the oil field, detecting the state of the oil well, reducing the cost and automating oil extraction management.

At present, because the manual sampling and testing method has long sampling time, high manual labor intensity, strong randomness, large error and low efficiency, the field work of the oil field gradually starts to adopt an oil well wellhead crude oil moisture content on-line monitor to measure the moisture content of the crude oil; in the production operation process, because a cluster well group single tube unheated (well mouth dosing) oil collecting flow is adopted, when the water content online monitor operates in winter, the well mouth temperature is too low, the wax deposition rate in an oil collecting pipeline is high, wax is easily hung on the surface of a probe of the water content online monitor, the water content monitoring data distortion is caused, and the measurement of the water content of crude oil at the well mouth of an oil well is influenced. Therefore, in the oil field wellhead unheated oil collecting process in actual production, how to take proper measures to improve the phenomenon of paraffin hanging on the surface of the probe of the water content online detector, the detection of the water content data has accuracy and authenticity, the production management level of the oil field is improved, and the method has important significance for the smooth operation of actual industrial production.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming of the prior art, the utility model aims to provide an oil well head crude oil moisture content on-line monitoring appearance erases device, the device simple structure is compact, and the installation is maintained conveniently, has solved the self-cleaning problem of oil well head crude oil moisture content device probe wax deposition.

In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:

an erasing device of an online monitor for the crude oil moisture content of an oil well wellhead comprises an erasing head, an explosion-proof shell, an electric push rod, a micro motor and a control circuit board, wherein the electric push rod, the micro motor and the control circuit board are arranged in the explosion-proof shell;

the miniature motor is fixed at the bottom of the explosion-proof shell, one end of the electric push rod is connected with the miniature motor, the other end of the electric push rod extends out of the explosion-proof shell and is connected with the erasing head through an erasing head connecting rod, and an oil passing channel is formed in the erasing head;

the erasing head connecting rod is sleeved with a protective pipe, the front end of the explosion-proof shell is provided with a front explosion-proof end cover, the front explosion-proof end cover is provided with an electric cable leading-out port and an opening for fixing one end of the protective pipe, and the other end of the protective pipe is provided with a butt joint for connecting with an oil outlet pipeline;

the electric push rod is internally provided with a travel limit switch, and when the control circuit board drives the micro motor to be electrified and operated, the micro motor drives the electric push rod to move, so that the erasing head connecting rod drives the erasing head to do linear reciprocating motion.

Preferably, the erasing head is connected with the erasing head connecting rod through a cap nut.

Preferably, a piston rod sealing ring is arranged at the contact part of the butt joint and the erasing head connecting rod.

Preferably, the butt joint is externally provided with external threads for mating with a flowline connection.

Preferably, the protective tube and the electric cable outlet are respectively connected with the front explosion-proof end cover through threads.

Preferably, a control circuit bracket is arranged outside the control circuit board, and the control circuit board and the control circuit bracket are fixed on the electric push rod through fastening screws.

Preferably, the base of the explosion-proof shell is externally provided with a rear explosion-proof end cover.

Preferably, the rear explosion-proof end cover and the explosion-proof housing are fixed by a locking nut.

Preferably, the contact part of the rear explosion-proof end cover and the explosion-proof shell is sealed by an O-shaped ring.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses an erasing device of an oil well wellhead crude oil moisture content on-line monitor, which is designed and disclosed with an erasing device externally matched with the oil well wellhead crude oil moisture content on-line monitor, and the erasing device drives an electric push rod internally provided with a travel limit switch to move through a micro motor, and then drives an erasing head to automatically reciprocate the erasing of a moisture content on-line monitor probe, thereby realizing the automatic cleaning of the moisture content on-line monitor probe by the erasing device; an oil passage is formed in the erasing head of the erasing device, so that when the device operates to clean wax scale on the pipe wall, the phenomenon that the pressure is built due to blocking of crude oil flow can be avoided, and further, the overpressure of the oil pumping unit or crude oil leakage cannot be caused; in addition, for the convenience of practical use, this device can be fixed with this wiping arrangement and oil well pipeline installation through setting up butt joint, and the actual production of being convenient for is used. The utility model discloses an oil well head crude oil moisture content on-line monitoring appearance erases device can realize that well head crude oil moisture content on-line monitoring appearance surface hangs the automation of wax and erases, and its simple structure is compact, and convenience safe in utilization has improved the measurement accuracy of crude oil moisture content on-line monitoring appearance. Through the condition statistics of using this erasing device, this erasing device has guaranteed that the relative error control of oil well wellhead crude oil moisture content measured data is within the scope of 15%, and qualified data reaches more than 90%, can adapt to the oil field wellhead and do not heat the characteristics that the oil collecting flow, output are low, intermittent liquid well outlet lead to the well head pipeline easily to wax, improve the oil field production management level.

Further, the erasing head and the erasing head connecting rod are connected in a threaded mode, so that the erasing head can be used, detached and replaced more conveniently.

Furthermore, a piston rod sealing ring is arranged at the contact position of the butt joint and the erasing head connecting rod, so that crude oil can be prevented from entering the cavity of the erasing device, and the use safety of the erasing device is ensured.

Furthermore, the external threads are arranged outside the butt joint, so that the butt joint can be connected with the internal thread four-way joint on the oil well pipeline, and the erasing device is connected with the oil well pipeline more safely and reliably.

Drawings

FIG. 1 is a schematic structural view of the erasing device of the online monitor for crude oil water content at the wellhead of the oil well of the utility model;

wherein: 1-an erase head; 2-oil passing channel; 3-cap nut; 4-butt joint; 5-protecting the pipe; 6-piston rod sealing ring; 7-erasing head connecting rod; 8-an electric cable outlet; 9-front explosion-proof end cover; 10-an explosion-proof housing; 11-an electric push rod; 12-a control circuit board; 13-a micro motor; 14-control circuit board support; 15-O-rings; 16-a lock nut; 17-a fastening screw; 18-rear explosion-proof end cap;

FIG. 2 is a schematic diagram of the on-site connection between the erasing device of the oil wellhead crude oil moisture content on-line monitor and the moisture content monitor of the utility model;

wherein: 19-oil extraction well head; 20-erasing device of the oil well wellhead crude oil moisture content online monitor; 21-connecting the pipe fittings; 22-internal threaded four-way connection; 23-plug; 24-annular water content measuring device; 25-flow line.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Referring to fig. 1, the device for erasing the crude oil moisture content on-line monitor of the oil well wellhead comprises an erasing head 1, wherein the erasing head 1 is fixed through a cap nut 3, an oil passing channel 2 is arranged on the erasing head 1, and crude oil can normally flow from the oil passing channel 2 in the erasing process; the erasing head 1 is connected with the erasing head connecting rod 7 through threads, so that the erasing head is convenient to disassemble and replace; the contact surface of the butt joint 4 and the erasing head connecting rod 7 is provided with three piston rod sealing rings 6 which can prevent crude oil from entering a cavity of the device, the lower end of the butt joint 4 is provided with external threads which can be connected with an internal thread four-way joint on an oil well pipeline, the upper end of the butt joint is welded with the lower end of a protection pipe 5, and the rear end of the protection pipe 5 and an electric cable lead-out opening 8 are respectively connected with a front explosion-proof end cover 9 through threads; the micro motor 13 and the electric push rod 11 are fixed on the base of the explosion-proof shell 10 through bolts, and the electric push rod 11 is connected with the erasing head connecting rod 7 through screws; the control circuit board 12 and the control circuit bracket 14 are fixed with the shell of the electric push rod 11 through a fastening screw 17; the rear explosion-proof end cover 18 is connected with the explosion-proof shell 10 through threads, a locking nut 16 is fixed, the contact surface is sealed by an O-shaped ring 15, and all the components are assembled into an erasing device of the moisture content online monitor.

Specifically, in the embodiment, the specification of the erasing head 1 is phi 50mm multiplied by 30mm long, and the erasing head is uniformly distributed along a phi 29 circular ring, so that the flowing of crude oil is not influenced when paraffin scales on the wall of a pipe are conveniently cleaned up and down; the specification of the oil passage 2 is a 6-phi 9 round hole structure; the specification of the cap-shaped nut 3 selects M8, the butt joint 4 is a DN50 three-way joint on an external thread connecting pipeline, the external specification is a connecting protective pipe with phi 60mm multiplied by 60mm long + phi 38mm multiplied by 15mm long, and the middle part is S70 hexagonal steel; the specification of the protective tube 5 is phi 45mm multiplied by 5mm to 300mm long; the specification of the piston rod sealing ring 6 is 18mm multiplied by 10mm multiplied by 6mm Y-shaped rubber sealing ring; the specification of the erasing head connecting rod 7 is phi 10mm multiplied by 370mm long + phi 35mm multiplied by 40 mm; the electric cable leading-out port 8 selects a thread explosion-proof joint surface M16 multiplied by 1.5, the specification of the front explosion-proof end cover 9 is phi 88mm multiplied by 13mm, 2 open holes are arranged on the front explosion-proof end cover, one hole of M45 multiplied by 1.5 is used as a connecting protective pipe, and the other hole is used as a connecting cable leading-out port and is matched with the outer diameter of a cable; the specification of the explosion-proof shell 10 is phi 88mm multiplied by 4mm to 380mm long; the specification of the internal thread four-way joint on the oil well pipeline is DN 50.

The electric push rod 11 and the micro motor 13 are purchased, and a 12V micro motor and a direct current push rod are respectively selected as the electric push rod 11, the specification is phi 30mm, the stroke is 300mm, and the thrust is 300N; the specification of the control circuit board 12 is 80mm long multiplied by 60mm wide, and a hole 4 phi 3.2 is arranged on the control circuit board; the control circuit board bracket 14 is L-shaped, and the size of the control circuit board bracket is 210mm multiplied by 70mm +18mm multiplied by 70 mm-2 phi 6.5 holes with the thickness of 2 mm; the O-shaped ring 15 is made of oil-resistant rubber with the specification of phi 88mm multiplied by 3.3 mm; the locking nut 16 is selected to be M6 multiplied by 10 mm; the fastening screw 17 is selected to be M6 multiplied by 12 mm; the specification of the rear explosion-proof end cover 18 is phi 100mm multiplied by 6mm, the length is 40mm, and the rear explosion-proof end cover is provided with internal threads for connecting the explosion-proof shell 10.

Preferably, when the erasing head 1 can conveniently clean paraffin and dirt on the pipe wall up and down, the flow of crude oil is not influenced.

Preferably, the threads adopt a thread explosion-proof joint face, the meshing threads are larger than 5 buttons, the meshing length is larger than 8mm, the tightness of the device is guaranteed, and oil gas in a working environment is prevented from entering the device.

Refer to fig. 2, do the utility model discloses an oil well wellhead crude oil moisture content on-line monitoring appearance erases on-the-spot installation schematic diagram of device. The oil well mouth crude oil moisture content on-line monitoring instrument erasing device 20 is arranged on an oil outlet pipeline 25 of the oil well mouth 19, and the connection mode is threaded connection. During installation, the pumping unit is stopped, the internal thread tee joint of the original oil pipeline is detached, the internal thread cross 22 is installed at the position of the connecting pipe fitting 21, the plug 23 is installed on the right side of the internal thread cross 22, a raw material belt is wound on the connecting thread at the lower end of the erasing device 20, the internal thread cross 22 is firmly connected with the upper end of the internal thread cross 22, the lower end of the internal thread cross 22 is connected with the annular water content measuring device 24, the annular water content measuring device 24 is connected with the pipe fitting on the single-well oil pipeline 25 through screw threads, it is ensured that the connecting thread positions of all the parts are not leaked, an explosion-proof hose is used for introducing a signal line. The device is installed without the need of live-fire dynamic welding transformation of pipelines, and the installation process is simple and convenient.

In this embodiment, the specifications of the erasing device 20, the oil outlet line 25, the internal thread tee joint of the oil outlet line, and the internal thread four-way joint 22 all adopt matched DN 50. The connecting pipeline between the erasing device 20 and the oil outlet pipeline 25 disclosed by the invention needs to meet the specification DN50 PN 4.0.

The working principle of the erasing device of the oil well wellhead crude oil moisture content on-line monitor is as follows:

the utility model discloses an oil well wellhead crude oil moisture content on-line monitoring appearance erases device eraser adopts machinery to erase the mode: the control circuit board 12 realizes the communication of each element, after the external power supply is switched on, the relay in the control circuit board 12 is driven to be sucked, the micro motor 13 is electrified to operate, the electric push rod 11 drives the erasing head connecting rod 7 and the erasing head 1 to do linear motion, the travel limit switch is arranged in the electric push rod 11, after the preset travel is reached, the control circuit board 12 switches the power supply, and the electric push rod 11 drives the erasing head connecting rod 7 and the erasing head 1 to do return motion and return to the original position, so that the probe erasing action is completed.

The erasing time interval can be set as required, namely, the preset erasing time can be set by a preset program in the control circuit board 12, daily regular erasing is realized, and the erasing efficiency and the erasing effect in practical use are improved.

The erasing head 1 is matched with an oil well wellhead crude oil water content online monitor for use.

The main technical parameters are as follows:

a. rated voltage: DC 24V;

b. rated power: 20W;

c. rated thrust: 1000N;

d. rated stroke: 200 mm;

e. operating frequency: 2 h/time;

the utility model discloses an oil well wellhead crude oil moisture content on-line monitoring appearance erases device is through the on-the-spot installation back of device, and the wax deposition condition after the on-the-spot use month of inspection model machine, probe part wax deposition layer <2mm, and the wax deposition area is less than 10%, has effectively solved the problem of probe surface wax hanging.

Compared with the manual sampling test result, when the volume water content of the crude oil at the wellhead is less than or equal to 50 percent, the relative error of the measurement data of the water content of the crude oil at the oil well is less than or equal to 15 percent; when the volume water content of the crude oil at the wellhead is more than 50 percent, the relative error is less than or equal to 10 percent; qualified data meeting the error requirements in the water content comparison data reach more than 90%.

To sum up, the utility model discloses for the first time the oil well head crude oil moisture content on-line monitoring appearance has been supporting to erase the device, has solved the well head crude oil moisture content device probe wax deposition problem that oil field well head unheated oil collecting technology caused. Secondly, the utility model provides an erase the device and ensured the authenticity of oil well wellhead crude oil moisture content measured data, improved the measurement accuracy of moisture content, most moisture content data relative error is within 15% within range. Thirdly, the utility model provides an erase device compact structure, small in size, the installation is maintained conveniently, need not the operation of starting a fire. Finally, the device is suitable for measuring the crude oil water content of the oil well wellhead in an oil area, can be matched with an annular crude oil water content online monitor for use, is suitable for the characteristics that the oil well wellhead does not heat an oil collecting flow, the yield is low, and the intermittent liquid outlet well mostly causes the wax deposition of a wellhead pipeline, and can be popularized and used in the oil field on a large scale.

The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.

Claims (9)

1. An erasing device of an online monitor for crude oil moisture content of an oil well wellhead is characterized by comprising an erasing head (1), an explosion-proof shell (10), an electric push rod (11), a micro motor (13) and a control circuit board (12), wherein the electric push rod (11), the micro motor (13) and the control circuit board are arranged in the explosion-proof shell (10);

the miniature motor (13) is fixed at the bottom of the explosion-proof shell (10), one end of the electric push rod (11) is connected with the miniature motor (13), the other end of the electric push rod extends out of the explosion-proof shell (10) and is connected with the erasing head (1) through the erasing head connecting rod (7), and the erasing head (1) is provided with an oil passing channel (2);

a protective pipe (5) is sleeved outside the erasing head connecting rod (7), a front anti-explosion end cover (9) is arranged at the front end of the anti-explosion shell (10), an electric cable leading-out port (8) and an opening for fixing one end of the protective pipe (5) are formed in the front anti-explosion end cover (9), and a butt joint (4) for connecting with an oil outlet pipeline is arranged at the other end of the protective pipe (5);

a travel limit switch is arranged in the electric push rod (11), when the control circuit board (12) drives the micro motor (13) to be electrified and operated, the micro motor (13) drives the electric push rod (11) to move, and therefore the erasing head connecting rod (7) drives the erasing head (1) to do linear reciprocating motion.

2. The online monitor erasing device for crude oil water content at the wellhead of the oil well according to claim 1, characterized in that the erasing head (1) is tightly connected with the erasing head connecting rod (7) through a cap nut (3).

3. The erasing device of the online monitor for crude oil water content of the oil wellhead according to claim 1, characterized in that a piston rod sealing ring (6) is arranged at the contact part of the butt joint (4) and the erasing head connecting rod (7).

4. The erasing device of the online monitor for crude oil water content at the wellhead of the oil well according to claim 1, characterized in that the butt joint (4) is externally provided with an external thread which is connected and matched with an oil outlet pipeline.

5. The oil well wellhead crude oil water content online monitor erasing device as claimed in claim 1, wherein the protective pipe (5) and the electric cable outlet (8) are respectively connected with the front explosion-proof end cover (9) through threads.

6. The oil well wellhead crude oil water content online monitor erasing device according to claim 1, characterized in that a control circuit bracket (14) is arranged outside the control circuit board (12), and the control circuit board (12) and the control circuit bracket (14) are fixed on the electric push rod (11) through a fastening screw (17).

7. The erasing device of the online monitor for the water content of crude oil at the wellhead of the oil well as defined in claim 1 is characterized in that a rear explosion-proof end cover (18) is arranged outside the base of the explosion-proof shell (10).

8. The online monitor erasing device for crude oil water content of the oil wellhead according to claim 7, characterized in that the rear explosion-proof end cover (18) and the explosion-proof housing (10) are fixed through a locking nut (16).

9. The online monitor erasing device for crude oil water content of the oil wellhead according to claim 8, characterized in that the contact part of the rear explosion-proof end cover (18) and the explosion-proof shell (10) is sealed by an O-shaped ring (15).

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