CN110295872B - Wellhead flow regulating valve - Google Patents
Wellhead flow regulating valve Download PDFInfo
- Publication number
- CN110295872B CN110295872B CN201910586138.7A CN201910586138A CN110295872B CN 110295872 B CN110295872 B CN 110295872B CN 201910586138 A CN201910586138 A CN 201910586138A CN 110295872 B CN110295872 B CN 110295872B
- Authority
- CN
- China
- Prior art keywords
- valve
- flow
- working channel
- detection device
- position detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 60
- 239000012530 fluid Substances 0.000 claims abstract description 72
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 43
- 238000001514 detection method Methods 0.000 claims description 39
- 230000007246 mechanism Effects 0.000 claims description 31
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 28
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 8
- 238000004891 communication Methods 0.000 abstract description 7
- 239000003345 natural gas Substances 0.000 abstract description 4
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000007423 decrease Effects 0.000 description 4
- 239000002343 natural gas well Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
Landscapes
- 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)
- Sliding Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The application relates to the technical field of natural gas and petroleum exploitation and discloses a wellhead flow regulating valve. According to the wellhead flow regulating valve, in the working process, when the valve core is located at a high flow position, the volume of the regulating cavity is maximum, the area of communication between the fluid inlet and the regulating cavity is also maximum, fluid in an oil-gas well enters the regulating cavity through the fluid inlet, and then flows out of the flow regulating valve through the fluid outlet, so that the fluid flow is maximum. In the process of moving the valve core from the high-flow position to the low-flow position, the volume of the adjusting cavity is gradually reduced, the communication area between the fluid inlet and the adjusting cavity is gradually reduced, and at the moment, the amount of fluid in the oil-gas well flowing out of the fluid outlet in unit time is reduced. Therefore, the fluid flow can be regulated by regulating the axial position of the valve core. The wellhead flow regulating valve provided by the embodiment is simple in structure and control mode and low in cost.
Description
Technical Field
The application relates to the technical field of natural gas and petroleum exploitation, in particular to a wellhead flow regulating valve.
Background
In the production process of an oil and gas well, in order to ensure that the oil and gas well is in an optimal working state, the fluid flow of the wellhead of the oil and gas well needs to be controlled. Currently, a thin film flow regulating valve is mainly arranged at the wellhead of an oil-gas well. But membrane flow control valves are costly. The film flow regulating valve needs to collect a driving air source from a sleeve of the oil and gas well, and the sleeve air needs to be depressurized and filtered before entering the pneumatic film valve. This requires the provision of complex lines and connections and requires cumbersome solenoid valve control. The safety risk and the overhaul workload of the wellhead are greatly increased under the conditions, and the working reliability of the wellhead is poor.
Disclosure of Invention
The embodiment of the application provides a well head flow control valve, its low cost to it also can reliably realize the flow control of oil gas well head under the condition that does not adopt the sleeve pipe gas as the power supply, thereby stopped safety risk and the maintenance problem that exist when sleeve pipe gas is as the power supply, improved the operational reliability of oil gas well head.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:
a wellhead flow regulating valve comprising: the valve body defines a working channel, a fluid inlet which is communicated with the working channel and the outside along the radial direction is formed in the valve body, and a fluid outlet which is communicated with one axial end of the working channel is formed in the valve body; the valve core is arranged in the working channel and is in sealing contact with the inner wall of the working channel, and the valve core divides the working channel into an adjusting cavity close to the fluid outlet and a working cavity far away from the fluid outlet; the valve rod is arranged in the working channel and positioned in the working cavity, and is fixedly connected with the valve core; the shaft sealing mechanism is fixed in the working cavity and is movably penetrated by the valve rod; the driving mechanism is connected with one end of the valve rod, which is far away from the valve core; wherein the driving mechanism is configured to drive the valve core to reciprocate along the working channel between a high-flow position far away from the fluid outlet and a low-flow position close to the fluid outlet through the valve rod so as to adjust the volume of the adjusting cavity; when the valve core is positioned at the high-flow position, the fluid inlet is at least partially communicated with the regulating cavity; in the process of moving the valve core from the high-flow position to the low-flow position, the area of the fluid inlet communicated with the adjusting cavity is gradually reduced.
Further, the fluid inlet is an elongated aperture extending along the working channel.
Further, a plurality of fluid inlets are arranged around the working channel.
Further, the outer peripheral surface of the valve core is provided with an arc-shaped cross-section outline, and the outer peripheral surface of the valve core is in line contact with the inner wall of the working channel.
Further, the wellhead flow regulating valve further comprises a first position detecting device, a second position detecting device and a triggering device; the trigger device is configured to move with the valve stem; the first position detection device and the second position detection device are fixedly arranged relative to the valve body; the first position detection device is configured to cooperate with the trigger device when the valve core moves to the high flow position; the second position detection device is configured to cooperate with the trigger device when the valve spool moves to the low flow position; the first position detection device and the second position detection device are electrically connected with the driving mechanism.
Further, the wellhead flow regulating valve further comprises a third position detecting device and a fourth position detecting device; the third position detection device and the fourth position detection device are fixedly arranged relative to the valve body; the third position detection device is configured to be matched with the trigger device after the valve core moves along the direction from the low-flow position to the high-flow position and passes over the high-flow position; the fourth position detection device is configured to be matched with the trigger device after the valve core moves along the direction from the high-flow position to the low-flow position and passes through the low-flow position; the third position detection device and the fourth position detection device are electrically connected with the driving mechanism.
Further, the first position detecting device and the second position detecting device are proximity switches, and the third position detecting device and the fourth position detecting device are microswitches.
Further, the driving mechanism comprises a motor, an external threaded rod and an internal threaded sleeve; the motor is fixedly connected with the valve body, and the external threaded rod and the internal threaded sleeve are in threaded fit and are arranged in the working channel; one of the external threaded rod and the internal threaded sleeve is in transmission connection with an output shaft of the motor, and the other is connected with the valve rod and is in non-rotatable fit with the valve body.
Further, the shaft sealing mechanism comprises a sealing sleeve, an elastic sleeve, a spring, a first limiting ring and a second limiting ring; the first limiting ring and the second limiting ring are relatively fixed in the working channel; the sealing sleeve, the elastic sleeve and the spring are arranged between the first limiting ring and the second limiting ring; the sealing sleeve is slidably sleeved on the valve rod; one end of the sealing sleeve, which is close to the first limiting ring, protrudes outwards in the radial direction to form a contact ring; the elastic sleeve is sleeved on the sealing sleeve; one end of the spring is abutted against the second limiting ring; the other end of the spring acts on the elastic sleeve to enable the elastic sleeve to be clung to the contact ring, and enable the contact ring to be clung to the first limiting ring; the outer peripheral surface of the elastic sleeve is contacted with the inner surface of the working channel; the inner peripheral surface of the elastic sleeve is contacted with the outer peripheral surface of the sealing sleeve; the inner peripheral surface of the packing is in contact with the outer peripheral surface of the valve stem.
Further, the elastic sleeve comprises a plurality of mutually independent rubber rings which are arranged side by side.
The technical scheme of the application has at least the following advantages and beneficial effects:
according to the wellhead flow regulating valve, in the working process, when the valve core is located at a high flow position, the volume of the regulating cavity is maximum, the area of communication between the fluid inlet and the regulating cavity is also maximum, fluid in an oil-gas well enters the regulating cavity through the fluid inlet, and then flows out of the flow regulating valve through the fluid outlet, so that the fluid flow is maximum. In the process of moving the valve core from the high-flow position to the low-flow position, the volume of the adjusting cavity is gradually reduced, the communication area between the fluid inlet and the adjusting cavity is gradually reduced, and at the moment, the amount of fluid in the oil-gas well flowing out of the fluid outlet in unit time is reduced. Therefore, the fluid flow can be regulated by regulating the axial position of the valve core. The wellhead flow regulating valve structure and the control mode are simple, the cost is low, and the wellhead flow regulating valve can reliably realize the flow regulation of the wellhead of the oil and gas well under the condition that the casing gas is not used as a power source, so that the safety risk and the overhaul problem existing when the casing gas is used as the power source are avoided, and the working reliability of the wellhead of the oil and gas well is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description briefly describes the drawings that need to be used in the embodiments. It is appreciated that the following drawings depict only certain embodiments of the application and are not to be considered limiting of its scope. Other figures can be obtained from these figures without inventive effort for the person skilled in the art.
Fig. 1 is an external structural schematic diagram of a wellhead flow regulating valve provided in an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a wellhead flow regulator valve according to an embodiment of the present disclosure, wherein a spool is located at a high flow position;
FIG. 3 is a schematic cross-sectional view of a wellhead flow regulator valve according to an embodiment of the present disclosure, wherein a valve core is located at a low flow position;
FIG. 4 is a schematic structural diagram of a valve core and a valve rod in the wellhead flow regulating valve according to the embodiment of the present application;
fig. 5 is a schematic diagram a of a partial structure of a wellhead flow regulating valve according to an embodiment of the present disclosure;
fig. 6 is a schematic diagram B of a partial structure of a wellhead flow regulating valve according to an embodiment of the present application.
In the figure: 010-wellhead flow regulating valve; 100-valve body; 101-adjusting the cavity; 102-working chamber; 100 a-working channel; 100 b-fluid outlet; 100 c-fluid inlet; 110-elongated holes; 200-valve core; 300-valve stem; 400-shaft sealing mechanism; 410-a first stop collar; 420-a second limiting ring; 430-sealing sleeve; 431-contact ring; 440-elastic sleeve; 450-springs; 500-a driving mechanism; 510-an electric motor; 520-an external threaded rod; 530-an internal thread sleeve; 610-first position detection means; 620-second position detection means; 630-third position detection means; 640-fourth position detecting means; 650-triggering means; 651-trigger lever; 652-trigger plate; 700-supporting plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present application.
Thus, the following detailed description of the embodiments of the present application is not intended to limit the scope of the application, as claimed, but is merely representative of some embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that, under the condition of no conflict, the embodiments and features and technical solutions in the embodiments may be combined with each other.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that, the terms "upper", "lower", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or an azimuth or a positional relationship conventionally put in use of the inventive product, or an azimuth or a positional relationship conventionally understood by one skilled in the art, such terms are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application.
In the description of this application, an "oil and gas well" may refer to an oil well as a natural gas well. When the "oil and gas well" is a natural gas well, it may be a natural gas well for the production of conventional natural gas or a natural gas well for the production of unconventional natural gas (shale gas, coalbed gas, etc.).
Examples
Fig. 1 is a schematic diagram of the external structure of a wellhead flow rate regulating valve 010 provided in this embodiment; fig. 2 is a schematic cross-sectional view of a wellhead flow rate regulating valve 010 according to the present embodiment, wherein a valve core 200 is located at a high flow position; fig. 3 is a schematic cross-sectional view of the wellhead flow regulating valve 010 according to the present embodiment, wherein the valve core 200 is located at a low flow position.
Referring to fig. 1, 2 and 3 in combination, in the present embodiment, the wellhead flow rate regulating valve 010 includes a valve body 100, a valve core 200, a valve stem 300, a shaft sealing mechanism 400 and a driving mechanism 500.
The valve body 100 is generally circular tubular in shape, and the valve body 100 defines an axially extending working channel 100a. One axial end of the valve body 100 is provided with a fluid outlet 100b communicating with one axial end of the working channel 100a. A fluid inlet 100c is formed at an end of the valve body 100 near the fluid outlet 100b, and communicates the working channel 100a with the outside in a radial direction. The spool 200 is axially movably disposed within the working channel 100a. The spool 200 divides the working channel 100a into a regulated chamber 101 near the fluid outlet 100b and a working chamber 102 remote from the fluid outlet 100b. A valve stem 300 is disposed in the working channel 100a and within the working chamber 102. The valve stem 300 extends in the axial direction of the working channel 100a, and the valve stem 300 is movable in the axial direction of the working channel 100a. One end of the valve stem 300, which is adjacent to the fluid outlet 100b, is fixedly connected to the valve cartridge 200. The shaft sealing mechanism 400 is fixedly arranged in the working cavity 102, and the shaft sealing mechanism 400 is movably penetrated by the valve rod 300. The fluid inlet 100c is located between the shaft seal mechanism 400 and the fluid outlet 100b. The drive mechanism 500 is coupled to an end of the valve stem 300 remote from the valve cartridge 200. The drive mechanism 500 is configured to reciprocate the valve cartridge 200 along the working channel 100a between a high flow position (the position shown in fig. 2) away from the fluid outlet 100b and a low flow position (the position shown in fig. 3) near the fluid outlet 100b by the valve stem 300 to adjust the volume of the adjustment chamber 101. When the valve core 200 is positioned at the high flow position, the fluid inlet 100c is at least partially communicated with the regulating cavity 101; during movement of the valve spool 200 from the high flow position to the low flow position, the area of the fluid inlet port 100c in communication with the regulator chamber 101 gradually decreases.
In the wellhead flow rate regulating valve 010 provided in this embodiment, when the valve core 200 is located at the high flow rate position in the working process, the volume of the regulating cavity 101 is the largest, the area of communication between the fluid inlet 100c and the regulating cavity 101 is the largest, at this time, fluid in the oil-gas well enters the regulating cavity 101 through the fluid inlet 100c, and then flows out of the wellhead flow rate regulating valve 010 through the fluid outlet 100b, so that the fluid flow rate is the largest. During the movement of the spool 200 from the high flow position to the low flow position, the volume of the adjustment chamber 101 gradually decreases, and the communication area between the fluid inlet 100c and the adjustment chamber 101 gradually decreases, and at this time, the amount of fluid in the oil and gas well flowing out of the fluid outlet 100b per unit time decreases. Thus, the fluid flow can be regulated by adjusting the axial position of the valve core 200. The wellhead flow regulating valve 010 provided by the embodiment has the advantages that the structure and the control mode are simple, the cost is low, and the flow regulation of the wellhead of the oil and gas well can be reliably realized under the condition that the casing gas is not used as a power source, so that the safety risk and the overhaul problem existing when the casing gas is used as the power source are avoided, and the working reliability of the wellhead of the oil and gas well is improved.
Further, in the present embodiment, the fluid inlet 100c is an elongated hole extending along the axial direction of the working channel 100a. The fluid inlet 100c is provided as a long hole, so that the flow rate of the fluid can be controlled more accurately in the axial movement process of the valve core 200.
Further, in the present embodiment, a plurality of fluid inlets 100c are arranged around the working channel 100a to enable fluid to enter the working channel 100a from a plurality of angles to make the fluid pressure within the working channel 100a uniform.
Fig. 4 is a schematic structural diagram of the valve core 200 and the valve stem 300 in the wellhead flow rate regulating valve 010 according to the present embodiment. Referring to fig. 4, in the present embodiment, the valve core 200 is in a shape of a circular cake, and the outer peripheral surface of the valve core 200 has an arc-shaped cross-sectional profile. The outer circumferential surface of the spool 200 is in line contact with the inner wall of the working channel 100a. In this way, the friction force between the spool 200 and the inner wall of the working channel 100a can be reduced, so that the spool 200 can freely move within the working channel 100a.
In this embodiment, the drive mechanism 500 includes a motor 510, an externally threaded rod 520, and an internally threaded sleeve 530. The motor 510 is fixedly coupled to an end of the valve body 100 remote from the fluid outlet 100b. The male screw shaft 520 is screw-engaged with the female screw housing 530. The male threaded rod 520 and the female threaded sleeve 530 are both located within the working channel 100a. In this embodiment, the male screw rod 520 is in driving connection with the output shaft of the motor 510 to rotate under the driving of the motor 510. The internally threaded sleeve 530 is axially movable and non-rotatably engaged with the valve body 100. An internally threaded sleeve 530 is coupled to the valve stem 300. When the motor 510 drives the male screw shaft 520 to rotate in one direction, the female screw cap 530 moves in the direction of the fluid outlet 100b. When the motor 510 rotates the male screw shaft 520 in the opposite direction, the female screw cap 530 moves in a direction away from the fluid outlet 100b. It will be appreciated that in other embodiments, the internally threaded sleeve 530 may be drivingly coupled to the output shaft of the motor 510, with the externally threaded rod 520 being axially movable and non-rotatably engaged with the valve body 100.
Further, in the present embodiment, the shaft sealing mechanism 400 includes a first stop collar 410, a second stop collar 420, a sealing sleeve 430, an elastic sleeve 440, and a spring 450. The first stop collar 410 and the second stop collar 420 are relatively fixed within the working chamber 102. The sealing sleeve 430, the elastic sleeve 440 and the spring 450 are disposed between the first stop collar 410 and the second stop collar 420. The sealing sleeve 430 is slidably sleeved on the valve rod 300. One end of the sealing sleeve 430, which is close to the first limiting ring 410, protrudes radially outwards to form a contact ring 431; the elastic sleeve 440 is sleeved on the sealing sleeve 430; one end of the spring 450 abuts against the second stop collar 420; the other end of the spring 450 acts on the elastic sleeve 440 to bring the elastic sleeve 440 into close contact with the contact ring 431 and bring the contact ring 431 into close contact with the first stop collar 410. The outer circumferential surface of the elastic sleeve 440 contacts the inner surface of the working channel 100 a; the inner circumferential surface of the elastic sleeve 440 contacts the outer circumferential surface of the sealing sleeve 430; the inner circumferential surface of the packing 430 contacts the outer circumferential surface of the valve stem 300. The spring 450 is always in a compressed state, and the spring 450 applies an elastic force to the elastic sleeve 440 along the axial direction, so that the elastic sleeve 440 drives the sealing sleeve 430 to move towards the first limiting ring 410, and finally the contact ring 431 is tightly attached to the first limiting ring 410 to form a seal. Under the axial force applied by the spring 450, the elastic sleeve 440 is deformed in the radial direction such that the outer circumferential surface of the elastic sleeve 440 is closely attached to the inner surface of the working channel 100a, while the inner circumferential surface of the elastic sleeve 440 is closely attached to the outer circumferential surface of the sealing sleeve 430 and applies a radially inward pressure to the sealing sleeve 430. The radially inward pressure exerted by the elastomeric sleeve 440 on the boot seal 430 enables the inner circumferential surface of the boot seal 430 to abut the outer circumferential surface of the valve stem 300. The above-described structure achieves sealing between the outer circumferential surface of the elastic sleeve 440 and the inner surface of the working channel 100a, sealing between the inner circumferential surface of the elastic sleeve 440 and the packing 430, and sealing between the inner circumferential surface of the packing 430 and the valve stem 300. In this way, the sealing between the valve rod 300 and the inner peripheral surface of the working channel 100a is realized, the fluid in the working channel 100a is prevented from contacting the driving mechanism 500, and the fluid is prevented from leaking out of the oil and gas well.
Further, in the present embodiment, the elastic sleeve 440 is made of rubber. Still further, the elastic sleeve 440 includes a plurality of rubber rings that are independent of each other and are disposed side by side. The plurality of rubber rings are in close contact with each other under the axial force exerted by the spring 450. Under the action of the axial force applied by the spring 450, each rubber ring is radially deformed independently, so that the axial direction of the sealing sleeve 430 can be ensured to be uniformly stressed, and the sealing performance between the sealing sleeve 430 and the valve rod 300 is improved.
Further, the sealing sleeve 430 may be made of polytetrafluoroethylene or nylon, and in this embodiment, the sealing sleeve 430 is made of polytetrafluoroethylene.
Fig. 5 is a schematic diagram a of a partial structure of a wellhead flow rate regulating valve 010 according to the present embodiment. Fig. 6 is a schematic diagram B of a partial structure of a wellhead flow rate regulating valve 010 provided in the present embodiment. Referring to fig. 5 and 6, in the present embodiment, the wellhead flow rate adjustment valve 010 further includes a first position detecting device 610, a second position detecting device 620, and a triggering device 650; the trigger 650 is configured to move with the valve stem 300; the first position detecting device 610 and the second position detecting device 620 are fixedly disposed with respect to the valve body 100; the first position detection device 610 is configured to engage the trigger device 650 when the spool 200 is moved to the high flow position; the second position detection device 620 is configured to engage the trigger device 650 when the spool 200 is moved to the low flow position; the first position detecting device 610 and the second position detecting device 620 are electrically connected to the driving mechanism 500.
Specifically, a support plate 700 is fixedly connected to the outer surface of the valve body 100, and the first position detecting device 610 and the second position detecting device 620 are fixed to the support plate 700. An elongated hole 110 extending in the axial direction is provided in the valve body 100. The elongated hole 110 communicates the working channel 100a with the outside. The trigger 650 includes a trigger lever 651 and a trigger plate 652. The trigger rod 651 extends through the elongate aperture 110. One end of the trigger rod 651 located in the working channel 100a is fixedly connected with the internal thread bush 530, the trigger rod 651 can prevent the internal thread bush 530 from rotating, and the trigger rod 651 can move along with the internal thread bush 530 in the axial direction. One end of the trigger lever 651 outside the valve body 100 is connected to the trigger plate 652. In this embodiment, the first position detecting device 610 and the second position detecting device 620 are proximity switches. When the valve core 200 moves to the high flow position, the trigger plate 652 approaches and triggers the first position detecting device 610, the first position detecting device 610 sends a first detection signal to the motor 510, and the motor 510 stops working after receiving the first detection signal. When the valve core 200 moves to the low flow position, the trigger plate 652 approaches and triggers the second position detecting device 620, the second position detecting device 620 sends a second detection signal to the motor 510, and the motor 510 stops working after receiving the second detection signal.
In the present embodiment, a third position detecting means 630 and a fourth position detecting means 640 are also provided; the third position detecting device 630 and the fourth position detecting device 640 are fixedly provided with respect to the valve body 100; the third position detection device 630 is configured to engage the trigger device 650 after the spool 200 moves in the direction from the low flow position to the high flow position and beyond the high flow position; the fourth position detection device 640 is configured to engage the trigger device 650 after the spool 200 moves in the direction of the high-flow position to the low-flow position and passes over the low-flow position; the third position detecting device 630 and the fourth position detecting device 640 are each electrically connected to the driving mechanism 500.
Specifically, the third position detecting device 630 and the fourth position detecting device 640 are fixed to the support plate 700. The third position detecting device 630 and the fourth position detecting device 640 are electrically connected to the power supply device of the driving mechanism 500. The third position detecting means 630, the first position detecting means 610, the second position detecting means 620, and the fourth position detecting means 640 are arranged in this order in the direction from the high flow rate position to the low flow rate position. The third position detecting device 630 and the fourth position detecting device 640 are proximity switches. When the spool 200 moves in the direction from the low flow position to the high flow position and passes over the high flow position, the trigger plate 652 abuts against the third position detecting device 630, and the third position detecting device 630 is triggered to emit a third detection signal. After receiving the third control signal, the power supply device of the driving mechanism 500 cuts off the power supply to the motor 510. When the spool 200 moves in the direction from the high flow rate position to the low flow rate position and passes through the low flow rate position, the trigger plate 652 abuts against the fourth position detecting device 640, and the third position detecting device 630 is triggered to emit a fourth detection signal. After receiving the fourth control signal, the power supply device of the driving mechanism 500 cuts off the power supply to the motor 510.
The foregoing is only a few examples of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (7)
1. Wellhead flow regulating valve, its characterized in that includes:
the valve body is provided with a fluid outlet communicated with one axial end of the working channel;
the valve core is arranged in the working channel and is in sealing contact with the inner wall of the working channel, and the valve core divides the working channel into a regulating cavity close to the fluid outlet and a working cavity far away from the fluid outlet;
the valve rod is arranged in the working channel and positioned in the working cavity, and is fixedly connected with the valve core;
the shaft sealing mechanism is fixed in the working cavity and is movably penetrated by the valve rod; and
the driving mechanism is connected with one end of the valve rod, which is far away from the valve core;
wherein the driving mechanism is configured to drive the valve core to reciprocate along the working channel between a high flow position far away from the fluid outlet and a low flow position close to the fluid outlet through the valve rod so as to adjust the volume of the adjusting cavity; when the valve core is positioned at the high flow position, the fluid inlet is at least partially communicated with the regulating cavity; in the process of moving the valve core from the high-flow position to the low-flow position, the area of the fluid inlet communicated with the regulating cavity is gradually reduced;
the fluid inlet is an elongated hole extending along the working channel;
a plurality of said fluid inlets are arranged around said working channel;
the outer peripheral surface of the valve core is provided with an arc-shaped cross-section outline, and the outer peripheral surface of the valve core is in line contact with the inner wall of the working channel.
2. The wellhead flow regulating valve according to claim 1, wherein:
the wellhead flow regulating valve further comprises a first position detecting device, a second position detecting device and a triggering device;
the trigger device is configured to move with the valve stem; the first position detection device and the second position detection device are fixedly arranged relative to the valve body; the first position detection device is configured to cooperate with the trigger device when the valve spool moves to the high flow position; the second position detection device is configured to cooperate with the trigger device when the valve spool moves to the low flow position;
the first position detection device and the second position detection device are electrically connected with the driving mechanism.
3. The wellhead flow regulating valve of claim 2, wherein:
the wellhead flow regulating valve further comprises a third position detecting device and a fourth position detecting device; the third position detection device and the fourth position detection device are fixedly arranged relative to the valve body; the third position detection device is configured to be matched with the trigger device after the valve core moves along the direction from the low-flow position to the high-flow position and passes through the high-flow position; the fourth position detection device is configured to be matched with the trigger device after the valve core moves along the direction from the high-flow position to the low-flow position and passes through the low-flow position;
the third position detecting device and the fourth position detecting device are electrically connected with the driving mechanism.
4. A wellhead flow regulating valve according to claim 3, characterised in that:
the first position detection device and the second position detection device are proximity switches, and the third position detection device and the fourth position detection device are microswitches.
5. The wellhead flow regulating valve according to claim 1, wherein:
the driving mechanism comprises a motor, an external threaded rod and an internal threaded sleeve;
the motor is fixedly connected with the valve body, and the external threaded rod and the internal threaded sleeve are in threaded fit and are arranged in the working channel;
one of the external threaded rod and the internal threaded sleeve is in transmission connection with an output shaft of the motor, and the other is connected with the valve rod and is in non-rotatable fit with the valve body.
6. The wellhead flow regulating valve according to claim 1, wherein:
the shaft sealing mechanism comprises a sealing sleeve, an elastic sleeve, a spring, a first limiting ring and a second limiting ring;
the first limiting ring and the second limiting ring are relatively fixed in the working channel; the sealing sleeve, the elastic sleeve and the spring are arranged between the first limiting ring and the second limiting ring; the sealing sleeve is slidably sleeved on the valve rod; one end of the sealing sleeve, which is close to the first limiting ring, protrudes outwards in the radial direction to form a contact ring; the elastic sleeve is sleeved on the sealing sleeve; one end of the spring is abutted against the second limiting ring; the other end of the spring acts on the elastic sleeve to enable the elastic sleeve to be clung to the contact ring, and enable the contact ring to be clung to the first limiting ring;
the outer peripheral surface of the elastic sleeve is in contact with the inner surface of the working channel; the inner peripheral surface of the elastic sleeve is contacted with the outer peripheral surface of the sealing sleeve; the inner peripheral surface of the sealing sleeve is in contact with the outer peripheral surface of the valve rod.
7. The wellhead flow regulating valve of claim 6, wherein:
the elastic sleeve comprises a plurality of mutually independent rubber rings which are arranged side by side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910586138.7A CN110295872B (en) | 2019-07-01 | 2019-07-01 | Wellhead flow regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910586138.7A CN110295872B (en) | 2019-07-01 | 2019-07-01 | Wellhead flow regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110295872A CN110295872A (en) | 2019-10-01 |
| CN110295872B true CN110295872B (en) | 2024-04-02 |
Family
ID=68029786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910586138.7A Active CN110295872B (en) | 2019-07-01 | 2019-07-01 | Wellhead flow regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110295872B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338856A (en) * | 2021-07-06 | 2021-09-03 | 成都百胜野牛科技有限公司 | Driving device of intelligent flow regulator of natural gas well |
| CN113309489A (en) * | 2021-07-06 | 2021-08-27 | 成都百胜野牛科技有限公司 | Self-adaptive turn-off structure of intelligent flow regulator of natural gas well |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036297A (en) * | 1975-03-21 | 1977-07-19 | Swihart Sr Patrick S | Subsurface flow control apparatus and method |
| CN2841950Y (en) * | 2005-11-08 | 2006-11-29 | 陈春生 | A kind of flushing control valve |
| CN201496037U (en) * | 2009-09-17 | 2010-06-02 | 新疆石油管理局试油公司 | Electric equipressure oil nozzle |
| CN203905868U (en) * | 2014-06-21 | 2014-10-29 | 长江大学 | Adjustment and control valve for underground flow state |
| CN105626958A (en) * | 2014-10-27 | 2016-06-01 | 中国石油天然气股份有限公司 | Flow regulating valve |
| CN206625820U (en) * | 2017-03-10 | 2017-11-10 | 伯特利阀门集团有限公司 | High-pressure well mouth choke valve |
| CN207268170U (en) * | 2017-10-10 | 2018-04-24 | 中国石油化工股份有限公司 | A kind of flow control valve |
| EP3469241A1 (en) * | 2016-06-14 | 2019-04-17 | National Oilwell Varco, L.P. | Valve assembly for well systems |
| CN210714632U (en) * | 2019-07-01 | 2020-06-09 | 成都百胜野牛科技有限公司 | Wellhead flow regulating valve |
-
2019
- 2019-07-01 CN CN201910586138.7A patent/CN110295872B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4036297A (en) * | 1975-03-21 | 1977-07-19 | Swihart Sr Patrick S | Subsurface flow control apparatus and method |
| CN2841950Y (en) * | 2005-11-08 | 2006-11-29 | 陈春生 | A kind of flushing control valve |
| CN201496037U (en) * | 2009-09-17 | 2010-06-02 | 新疆石油管理局试油公司 | Electric equipressure oil nozzle |
| CN203905868U (en) * | 2014-06-21 | 2014-10-29 | 长江大学 | Adjustment and control valve for underground flow state |
| CN105626958A (en) * | 2014-10-27 | 2016-06-01 | 中国石油天然气股份有限公司 | Flow regulating valve |
| EP3469241A1 (en) * | 2016-06-14 | 2019-04-17 | National Oilwell Varco, L.P. | Valve assembly for well systems |
| CN206625820U (en) * | 2017-03-10 | 2017-11-10 | 伯特利阀门集团有限公司 | High-pressure well mouth choke valve |
| CN207268170U (en) * | 2017-10-10 | 2018-04-24 | 中国石油化工股份有限公司 | A kind of flow control valve |
| CN210714632U (en) * | 2019-07-01 | 2020-06-09 | 成都百胜野牛科技有限公司 | Wellhead flow regulating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110295872A (en) | 2019-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6921071B2 (en) | Hydraulic pump control system | |
| US4491154A (en) | Double acting pilot valve | |
| US5074154A (en) | Fluid sampling pump | |
| CA2895416C (en) | Swivel top shaft valve actuator | |
| WO2013012609A1 (en) | Dual piston actuator and method of use | |
| CN110295872B (en) | Wellhead flow regulating valve | |
| GB2588044A (en) | Electric safety valve with well pressure activation | |
| US4461450A (en) | Remote control choke | |
| CN111810655B (en) | Electric flow regulating valve | |
| US5516079A (en) | Small flow control valve with tight shutoff capability | |
| US5718410A (en) | Small flow control valve with cartridge type seating arrangement | |
| CN210714632U (en) | Wellhead flow regulating valve | |
| US5191801A (en) | Fluid sampling pump | |
| CN210289706U (en) | Well head stop valve | |
| CN109751426B (en) | Dynamic flow balance valve | |
| CN110206508B (en) | Well mouth stop valve | |
| US5092742A (en) | Fluid sampling pump | |
| CN210003912U (en) | handle proportional valve | |
| US6805360B2 (en) | Regulator with segmented body | |
| CN116044354B (en) | Interlayer interference-free water distribution regulator | |
| CN217583214U (en) | High-precision long-life three-eccentric pneumatic adjusting butterfly valve | |
| CN111271476A (en) | Stop valve | |
| CN212273163U (en) | Quick response prefill valve | |
| CN210829182U (en) | Active flow control device | |
| CN111520499A (en) | Ball valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |