CN110552681B - Separator liquid level adjusting system for oil testing - Google Patents

Separator liquid level adjusting system for oil testing Download PDF

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Publication number
CN110552681B
CN110552681B CN201910819506.8A CN201910819506A CN110552681B CN 110552681 B CN110552681 B CN 110552681B CN 201910819506 A CN201910819506 A CN 201910819506A CN 110552681 B CN110552681 B CN 110552681B
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China
Prior art keywords
liquid level
valve
separator
valve seat
seat body
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CN201910819506.8A
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Chinese (zh)
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CN110552681A (en
Inventor
廖刚
贺秋云
曾小军
宋军正
黄船
舒梅
彭陶钧
谢奎
王雷
杨光炼
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China National Petroleum Corp
CNPC Chuanqing Drilling Engineering Co Ltd
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China National Petroleum Corp
CNPC Chuanqing Drilling Engineering Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34Arrangements for separating materials produced by the well
    • E21B43/38Arrangements for separating materials produced by the well in the well
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geophysics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

The invention provides a separator liquid level adjusting system for an oil testing test. The system comprises a separator body, a separator regulating valve and a liquid level regulating device, wherein the regulating valve comprises a valve seat, a valve core and a valve core connecting rod, the valve seat comprises a valve seat body and a seat ring, a sealing groove surrounding a second opening is formed in the lower surface of the valve seat body, a plurality of through holes are formed in the side wall of the valve seat body to form a flow channel, the seat ring is arranged at the bottom of the valve seat body and is of an integrated structure, the valve core can enter a cavity of the valve seat body through the first opening, one end of the valve core connecting rod is fixedly connected with the upper surface of the valve core and can drive the valve core to move up and down in the cavity structure; the liquid level adjusting device comprises an explosion-proof interface box, a radar liquid level meter, a control system and a valve positioner, wherein the radar liquid level meter, the control system and the valve positioner are sequentially connected along the signal transmission direction. The beneficial effects of the invention include: the flow-back test requirement of the large-scale pressurized fracturing well can be met, and the automatic control of the liquid level of the separator can also be realized.

Description

Separator liquid level adjusting system for oil testing
Technical Field
The invention relates to the field of oil testing, in particular to a separator liquid level adjusting system for oil testing.
Background
The test oil is a very important link of oil and gas field exploration and development, and the fluid produced by a shaft needs to be throttled, depressurized, separated, metered and the like so as to accurately obtain physical parameters such as pressure, temperature, yield and the like, and provide data support for the establishment of an exploration and development scheme. However, reservoir reconstruction has been normalized for production increase, and wellbore production fluid components are more and more complex (containing oil, sand, foam and the like), which often cause key components of separators such as a liquid level meter, a buoy and the like to be frequently blocked or attached to a liquid level sight window, so that a 'false liquid level' is easily formed, operators cannot accurately operate the separators, and part of natural gas is discharged into the atmosphere along with liquid paths of the separators. This not only affects the accuracy of the test oil test data, but also causes damage to the environment (especially containing hydrogen sulfide).
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, one of the objectives of the present invention is to provide a separator liquid level regulating system for oil test to realize automatic control of the separator liquid level.
In order to achieve the above object, the present invention provides a separator liquid level regulation system for a test run.
The system may include a separator body, a separator regulator valve, and a liquid level adjustment device, wherein,
the regulating valve can comprise a valve seat, a valve core and a valve core connecting rod, the valve seat can comprise a valve seat body and a seat ring, the valve seat body can be provided with a cavity structure penetrating through the upper surface and the lower surface, the cavity structure can respectively form a first opening and a second opening on the upper surface and the lower surface of the valve seat body, the lower surface of the valve seat body can be provided with a sealing groove surrounding the second opening, and the side wall of the valve seat body can be provided with a plurality of through holes to form a flow channel; the seat ring can be arranged at the bottom of the valve seat body and the valve seat body are of an integrated structure; the valve core can enter the cavity of the valve seat body through the first opening; one end of the valve core connecting rod can be fixedly connected with the upper surface of the valve core and can drive the valve core to move up and down in the cavity structure;
the liquid level adjusting device can comprise an explosion-proof interface box, a radar liquid level meter, a control system and a valve positioner, wherein the radar liquid level meter, the control system and the valve positioner are sequentially connected along the signal transmission direction; the explosion-proof interface box can comprise a digital-to-analog converter, and can receive the liquid level analog signal and convert the liquid level analog signal into a liquid level digital signal to output; the control system can comprise a liquid level calculation module and a PLC control module, wherein the liquid level calculation module can receive the liquid level digital signal and calculate the height of the liquid level of the separator according to the liquid level digital signal, the PLC control module can output a control digital signal according to the height of the liquid level of the separator calculated by the data acquisition module, and the explosion-proof interface box can also receive the control digital signal and convert the control digital signal into a control analog signal to output; the valve positioner can be connected with the governing valve, and the valve positioner can receive control analog signal controls the aperture size of governing valve.
In an exemplary embodiment of the present invention, the inner surface of the lower portion of the valve seat may be provided with a plurality of stoppers, which can prevent the valve element from excessively descending in the cavity.
In an exemplary embodiment of the present invention, the width of the sealing groove may be 0.2 to 0.4mm.
In an exemplary embodiment of the invention, the valve seat may further include a sealing ring built into the sealing groove.
In an exemplary embodiment of the invention, the flow passage of the valve seat may be coated with a corrosion resistant material.
In an exemplary embodiment of the present invention, the regulating valve may further include a fixing member capable of reinforcing a connection between the spool connecting rod and the spool.
In an exemplary embodiment of the present invention, the fixing member may include a fixing pin having an angle of 80 to 110 °.
In one exemplary embodiment of the invention, the radar level gauge may comprise an electromagnetic transmitter, a receiver and a probe assembly, wherein the probe assembly may extend all the way below the separator liquid level.
In an exemplary embodiment of the invention, the radar level gauge may further comprise a first wireless transmitting end capable of transmitting the level simulation signal;
the explosion-proof interface box may further include a first wireless receiving end capable of receiving the liquid level analog signal.
In an exemplary embodiment of the invention, the explosion-proof interface box may further include a second wireless transmitting terminal capable of transmitting the liquid level digital signal;
the control system can also comprise a second wireless receiving end connected with the liquid level calculating module, and the second wireless receiving end can receive the liquid level digital signal.
In an exemplary embodiment of the present invention, the control system may further include a third wireless transmitting terminal connected to the PLC control module, the third wireless transmitting terminal being capable of transmitting the control digital signal;
the explosion-proof interface box can also comprise a third wireless receiving end capable of receiving the control digital signal.
In an exemplary embodiment of the invention, the explosion-proof interface box may further include a fourth wireless transmitting terminal capable of transmitting the control analog signal;
the valve positioner may also include a fourth wireless receiver configured to receive the control analog signal.
Compared with the prior art, the beneficial effects of the invention can include: the separator can satisfy the flowback test demand of large-scale pressurized fracturing well, can also realize the automatic control of separator liquid level simultaneously.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 illustrates a schematic structural view of a valve seat of a separator regulator valve in an exemplary embodiment of the invention;
FIG. 2 illustrates a schematic of a valve spool and connecting rod of a separator regulator valve in an exemplary embodiment of the invention;
FIG. 3 illustrates a schematic of the configuration of the bottom of the valve seat of the separator regulator valve in an exemplary embodiment of the invention;
FIG. 4 shows a schematic structural view of a liquid level regulating device in an exemplary embodiment of the invention;
description of the main reference numbers:
1. disk seat body, 2, runner, 3, spacer pin, 4, connecting rod, 5, locating pin, 6, case, 7, seal groove, 8, sealing ring.
Detailed Description
Hereinafter, the separator level regulation system for the test run of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments, and the first, second, third and fourth appearing in the present invention do not indicate a sequential order but are used only for distinguishing one from another. The liquid level regulating system of the separator is a novel separator with the function of automatically regulating the liquid level.
The invention provides a separator liquid level adjusting system for an oil testing test.
In an exemplary embodiment of the invention, the system may include a separator body, a separator regulator valve, and a liquid level adjustment device.
In this embodiment, the regulating valve includes a valve seat, a spool, and a spool connecting rod.
As shown in fig. 1, the valve seat includes a valve seat body and a seat ring, the valve seat body has a cavity structure penetrating through the upper and lower surfaces, the cavity structure forms a first opening and a second opening on the upper and lower surfaces of the valve seat body, the seat ring can be arranged at the bottom of the valve seat body, and can be used for positioning the valve core, avoiding excessive downward movement of the valve core, and sealing the lower part of the valve seat regulating valve body, and the two can be integrated into a whole structure, further, the seat ring and the valve seat body can be integrally forged, so as to overcome the problem that the position where the valve seat body and the seat ring are combined is easy to leak and erode the valve seat. To improve erosion resistance of the valve seat, the valve seat may also be made of erosion-resistant material, such as 316S stainless steel. The side wall of the valve seat body can be provided with a plurality of through holes to form a flow channel, the through holes can be T-shaped, furthermore, in order to improve the erosion resistance of the valve seat, a corrosion-resistant material such as Ni60 (nickel 60) or YG8 (tungsten carbide) can be sprayed on the flow channel, and the number of the through holes can be 3-5, for example 4. As shown in fig. 3, a sealing groove surrounding the second opening is disposed on the lower surface of the valve seat body, and the width of the sealing groove may be 0.2-0.4 mm, and further may be 0.3mm. A sealing ring may be disposed in the sealing groove, and the sealing ring may be an Aflas rubber (i.e., tetrafluoroethylene rubber) sealing ring.
As shown in fig. 2, one end of the valve core connecting rod is fixedly connected to the upper surface of the valve core, wherein the regulating valve may further include a fixing member, the fixing member may further include a positioning pin having an angle of 80 to 110 degrees, for example, 90 degrees, two ends of the positioning pin are respectively connected to the valve core connecting rod and the valve core to further reinforce the connection therebetween, and further the positioning pin may be respectively connected to the valve core connecting rod and the valve core through a pin, wherein the valve core connecting rod may have a solid structure and may be used for connection of the pin by forming a special hole. The number of the positioning pins may be determined according to actual conditions, for example, at least one. Further, the positioning pin may include a positioning pin having an angle of 90 degrees. As shown in fig. 1, in order to avoid excessive downward movement of the valve element, a limiting device may be optionally disposed, the limiting device is disposed on the inner wall of the valve seat body, further, the limiting device may include at least one limiting pin, the limiting pins are uniformly distributed in the circumference of the inner wall of the valve seat body, and the number of the limiting pins may be four.
In this implementation, as shown in fig. 4, the liquid level adjusting device may include an explosion-proof interface box, and a radar liquid level gauge, a control system and a valve positioner, which are connected in sequence along the signal transmission direction. The liquid level sensor comprises a separator body, a radar liquid level meter, a liquid level sensor and a liquid level controller, wherein the radar liquid level meter is arranged at the top of the separator body and is configured to be capable of collecting liquid level information of the separator and generating and outputting liquid level analog signals; the explosion-proof interface box comprises a digital-to-analog converter, and can receive the liquid level analog signal and convert the liquid level analog signal into a liquid level digital signal for output; the control system comprises a liquid level calculation module and a PLC control module, wherein the liquid level calculation module is configured to be capable of receiving the liquid level digital signal and calculating the height of the liquid level of the separator according to the liquid level digital signal, the PLC control module is configured to be capable of outputting a control digital signal according to the height of the liquid level of the separator calculated by the data acquisition module, and the explosion-proof interface box is further capable of receiving the control digital signal and converting the control digital signal into a control analog signal to be output; the valve positioner is also connected with a regulating valve of the separator, and the valve positioner is configured to be capable of receiving the control analog signal and controlling the opening degree of the regulating valve.
In this embodiment, the separator regulator valve may further include an actuator connected to one end of the spool connecting rod (the end not connected to the spool).
The valve positioner can be connected with an actuating mechanism of the regulating valve of the separator so as to adjust the opening size of the regulating valve according to the control analog signal.
In this embodiment, the radar level gauge may comprise an electromagnetic wave transmitter, a receiver and a probe assembly, wherein the probe assembly extends all the way below the separator liquid level. The valve positioner may be mounted on a regulator valve of the separator.
In this embodiment, the radar level gauge may further comprise a first wireless transmitting terminal capable of transmitting the level simulation signal; the explosion-proof interface box may further include a first wireless receiving end capable of receiving the liquid level analog signal.
The explosion-proof interface box can also comprise a second wireless transmitting end capable of transmitting the liquid level digital signal; the control system can also comprise a second wireless receiving end connected with the liquid level calculating module, and the second wireless receiving end can receive the liquid level digital signal.
The control system can also comprise a third wireless transmitting end connected with the PLC control module, and the third wireless transmitting end can transmit the control digital signal; the explosion-proof interface box can also comprise a third wireless receiving end capable of receiving the control digital signal.
The explosion-proof interface box also comprises a fourth wireless transmitting end capable of transmitting the control analog signal; the valve positioner may also include a fourth wireless receiver configured to receive the control analog signal.
In this embodiment, liquid level adjusting device passes through the liquid level in the size adjustment separator of control separator regulating valve aperture according to the true liquid level condition in the separator, and when the liquid level was too high, separator regulating valve actuating mechanism passed through the connecting piece and drove the case and goes upward for the fluid increases through the area of overflowing of the runner on the disk seat body, reduces the separator liquid level.
In summary, the advantages of the separator liquid level regulation system for oil testing according to the present invention may include:
(1) The valve seat body is integrally forged by the seat ring and the valve seat body, so that the combined part of the seat ring and the valve seat body is prevented from being eroded, and the stability is improved; a built-in fixing device is arranged between the valve core and the connecting piece, so that the valve core can be prevented from falling off in the working process; a limiting device is arranged in the valve seat body, so that the valve core is prevented from excessively descending during working; the valve seat abandons the traditional metal winding pad, adopts the sealing groove and the sealing ring, realizes the sealing of the bottom of the valve seat body, and is convenient to install and reliable in sealing; the stainless steel material of 316S is preferred to the disk seat body, and the preferred tetrafluoroethylene-propylene rubber of rubber seal ring, simultaneously, the preferred spraying corrosion-resistant material of runner department has improved the erosion-resistant performance of disk seat.
(2) The real height of liquid level in the separator can be obtained through the information of the electromagnetic wave signal of radar level gauge, and according to the real height of separator liquid level, the aperture of separator governing valve is controlled in order to ensure that the liquid level of separator keeps in reasonable scope, can avoid the gas channeling of separator liquid circuit effectively to improve the security of oil testing test, reduce the pollution to the environment.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (7)

1. A separator liquid level regulating system for oil testing is characterized by comprising a separator body, a separator regulating valve and a liquid level regulating device, wherein,
the regulating valve comprises a valve seat, a valve core and a valve core connecting rod, wherein the valve seat comprises a valve seat body and a seat ring, the valve seat body is provided with a cavity structure penetrating through the upper surface and the lower surface, the cavity structure forms a first opening and a second opening on the upper surface and the lower surface of the valve seat body respectively, the lower surface of the valve seat body is provided with a sealing groove surrounding the second opening, and the side wall of the valve seat body is provided with a plurality of through holes to form a flow channel;
the seat ring is arranged at the bottom of the valve seat body and is of an integrated structure;
the valve core can enter the cavity of the valve seat body through the first opening;
one end of the valve core connecting rod is fixedly connected with the upper surface of the valve core and can drive the valve core to move up and down in the cavity structure;
the inner surface of the lower part of the valve seat is provided with a plurality of limiting pieces, and the limiting pieces can prevent the valve core from excessively descending in the cavity; the limiting piece comprises at least one limiting pin, and the limiting pins are uniformly distributed in the circumference of the inner wall of the valve seat body; a flow passage of the valve seat is coated with a corrosion-resistant material; the regulating valve also comprises a fixing piece which can reinforce the connection between the valve core connecting rod and the valve core; the fixing piece is a positioning pin, and two ends of the positioning pin are respectively connected with the connecting rod and the valve core;
the liquid level regulating device comprises an explosion-proof interface box, a radar liquid level meter, a control system and a valve positioner which are sequentially connected along the signal transmission direction,
the radar liquid level meter is arranged at the top of the separator body and can acquire liquid level information of the separator and generate and output liquid level analog signals;
the explosion-proof interface box comprises a digital-to-analog converter, and can receive the liquid level analog signal and convert the liquid level analog signal into a liquid level digital signal for output;
the control system comprises a liquid level calculation module and a PLC control module, wherein the liquid level calculation module can receive the liquid level digital signal and calculate the height of the liquid level of the separator according to the liquid level digital signal, the PLC control module can output a control digital signal according to the height of the liquid level of the separator calculated by the data acquisition module, and the explosion-proof interface box can also receive the control digital signal and convert the control digital signal into a control analog signal to output;
the valve positioner is connected with the regulating valve, and the valve positioner can receive the control analog signal and control the aperture size of regulating valve.
2. The separator liquid level adjustment system for the oil test as recited in claim 1, wherein the width of the seal groove is 0.2-0.4 mm.
3. The separator liquid level adjustment system for the oil test according to claim 1, wherein the valve seat further comprises a sealing ring built in the sealing groove.
4. The separator liquid level adjustment system for the oil test as recited in claim 1, wherein the fixing member includes a positioning pin having an angle of 80-110 °.
5. The separator level regulation system for oil testing of claim 1, wherein the radar level gauge comprises an electromagnetic transmitter, a receiver, and a probe assembly, wherein the probe assembly extends all the way below the separator liquid level.
6. The separator level regulation system for oil testing of claim 1, wherein the radar level gauge further comprises a first wireless transmitter capable of transmitting the level analog signal;
the explosion-proof interface box also comprises a first wireless receiving end capable of receiving the liquid level analog signal.
7. The separator liquid level regulating system for oil testing of claim 1, wherein the explosion-proof interface box further comprises a second wireless transmitting terminal capable of transmitting the liquid level digital signal;
the control system also comprises a second wireless receiving end connected with the liquid level calculating module, and the second wireless receiving end can receive the liquid level digital signal.
CN201910819506.8A 2019-08-31 2019-08-31 Separator liquid level adjusting system for oil testing Active CN110552681B (en)

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