CN114961605B - Hydraulic open-close circulation valve - Google Patents
Hydraulic open-close circulation valve Download PDFInfo
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- CN114961605B CN114961605B CN202210623501.XA CN202210623501A CN114961605B CN 114961605 B CN114961605 B CN 114961605B CN 202210623501 A CN202210623501 A CN 202210623501A CN 114961605 B CN114961605 B CN 114961605B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 57
- 230000000087 stabilizing effect Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 abstract description 25
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 125000004122 cyclic group Chemical group 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 43
- 238000012360 testing method Methods 0.000 description 12
- 230000009471 action Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Safety Valves (AREA)
Abstract
The invention provides a hydraulic start-stop circulation valve, which comprises an oil pipe joint and a bypass cover communicated with the oil pipe joint, wherein the bypass cover comprises a valve ball, a valve seat and a hydraulic conduction cylinder which are distributed from top to bottom; the valve rod is in sliding fit with the hydraulic transmission cylinder, the top end of the valve rod is in rotating fit with the valve ball, and an elastic piece is arranged between the bottom of the valve rod and the bypass cover; the first flow passage penetrates through the valve seat and the second flow passage penetrates through the hydraulic transmission cylinder along the axial direction, and the first flow passage is matched with the second flow passage; the pressure transmission cavity is positioned in the bypass cover and is communicated with the oil sleeve annulus, and the pressure of the pressure transmission cavity is used for driving the hydraulic transmission cylinder to descend. The invention aims to solve the problem that a sliding sleeve is required to be opened and closed by steel wire operation during cyclic well flushing in the prior art, and the invention realizes the purpose of quickly establishing and closing a cyclic well flushing passage by means of hydraulic pressure, shortens the operation time, improves the operation efficiency and is not limited by well deviation.
Description
Technical Field
The invention relates to the technical field of offshore oil extraction, in particular to a hydraulic start-stop circulation valve.
Background
The electric submersible pump production pipe columns of offshore oil fields are respectively provided with tools such as an empty packer of an oil sleeve ring and a downhole safety valve, the temperature of stratum produced crude oil is gradually reduced in the flowing process of a shaft, wax precipitation can occur on the inner wall of the oil pipe of a high-wax-content well, dead oil can be formed in the high-viscosity oil well, and in order to clean the pipe columns, circulating flushing is a common convenient means. However, after the packer is installed in the annulus, the oil pipe is not communicated with the oil sleeve annulus in the normal production process. In order to solve the need of cyclic well flushing, the treatment mode in the prior art is to install the sliding sleeve at a certain position on the upper part of the packer: when the well is required to be circularly washed, a special tool (such as a steel wire working tool) is required to be put into the well to open the sliding sleeve, and the sliding sleeve is required to be closed by putting into the special tool after well washing is finished so as to restore the oil well production. For example, chinese patent literature discloses a downhole control valve, is equipped with the control sliding sleeve in the upper valve seat, installs the spring outward the control sliding sleeve, is equipped with hollow floater in the cavity between upper valve seat and the lower valve seat, and the device can effectively prevent the well-flushing liquid leakage pollution stratum when the pumping unit well washes, guarantees normal production, can play the blowout prevention effect again, realizes not kill the well operation.
However, the tool of the scheme can be put into the well and the oil pumping production only by two pipe strings, the control valve, the packer and the releasing device form a first pipe string, the control valve and the packer are put into the well after the packer is set, the pipe string above the lost hand is lifted out, then the oil pumping production pipe string is put into the well, the bottom of the pipe string is provided with an inserting pipe, and the inserting pipe is inserted into the control valve through the releasing device to form the underground production pipe string, so that the functions of oil pumping, well flushing and the like are realized. Therefore, in the prior art, a circulating channel is established by means of the sliding sleeve, a special tool is needed to be put down when the sliding sleeve is opened and closed, time is wasted, and meanwhile, in a highly-inclined directional well or a horizontal well, the traditional steel wire operation is easy to fail, and the risk is high.
Disclosure of Invention
The invention aims to solve the problem that a sliding sleeve is required to be opened and closed by steel wire operation during cyclic well flushing in the prior art, and provides a hydraulic opening and closing circulating valve. The invention realizes the rapid establishment and closing of the circulating well flushing passage by means of hydraulic pressure, shortens the operation time, improves the operation efficiency and is not limited by well deviation.
In order to solve the technical problems, the invention adopts the following technical scheme:
the hydraulic open-close circulation valve comprises an oil pipe joint, a bypass cover communicated with the oil pipe joint, and a valve ball, a valve seat and a hydraulic conduction cylinder which are distributed from top to bottom in the bypass cover;
the valve rod is in sliding fit with the hydraulic transmission cylinder, the top end of the valve rod is in rotating fit with the valve ball, and an elastic piece is arranged between the bottom of the valve rod and the bypass cover;
the first flow passage penetrates through the valve seat and the second flow passage penetrates through the hydraulic transmission cylinder along the axial direction, and the first flow passage is matched with the second flow passage;
the pressure transmission cavity is positioned in the bypass cover and is communicated with the oil sleeve annulus, and the pressure of the pressure transmission cavity is used for driving the hydraulic transmission cylinder to descend;
when the hydraulic transmission cylinder is positioned at the top end of the stroke, the valve ball is closed, and the first flow passage and the second flow passage are mutually blocked;
when the hydraulic conduction cylinder is positioned at the stroke bottom end, the valve ball is opened, and the first flow passage and the second flow passage are communicated with each other.
Aiming at the problem that a sliding sleeve is required to be opened and closed by means of steel wire operation during circulating well flushing in the prior art, the invention provides a hydraulic open-close circulating valve. According to the oil pipe oil well control device, under a normal state, the elastic force of the elastic piece drives the hydraulic conduction cylinder to be located at the top end of a stroke, the valve rod is also located at the top end of the stroke, the valve ball is in a closed state, the first flow passage and the second flow passage are mutually cut off, so that the oil pipe is cut off between the inside of the oil pipe and an oil sleeve annulus, and normal oil extraction operation can be performed. When the circulation well flushing is needed, the oil sleeve annulus is pressurized, the pressure acts on the hydraulic transmission cylinder through the pressure transmission cavity, when the annulus is pressed to a certain degree, the elasticity of the elastic piece is overcome, the hydraulic transmission cylinder is enabled to descend, the valve seat is driven to descend synchronously, the valve rod is pushed to descend simultaneously, the valve ball is driven to rotate to an open state, at the moment, the first flow channel and the second flow channel are mutually communicated, namely, the communication between the inside of the oil pipe and the oil sleeve annulus is realized, and the circulation well flushing operation can be carried out. Of course, those skilled in the art will appreciate that the upper and lower in this application are with the production string being oriented uphole and downhole when in the well; the circulating well flushing mode of the application in working is reverse circulating well flushing.
When the well flushing operation is finished, after annulus pressure is lost or the internal pressure and the external pressure of the oil pipe are balanced, the pressure in the pressure transmission cavity is reduced, the elastic piece resets, drives the valve rod to ascend, drives the valve seat and the hydraulic transmission cylinder to ascend to the top end of the stroke, drives the ball valve to rotate to a closed state in the process, and can perform normal oil extraction operation again.
According to the method, the device and the system, the flushing hydraulic pressure can be directly used for quick opening and automatic closing after well flushing, the sliding sleeve does not need to be opened and closed respectively by adopting steel wire operation, and the problems of low efficiency, high risk and the like caused by the fact that the sliding sleeve is opened and closed by means of steel wire operation when the well is circularly flushed in the prior art are solved; the method can be used for vertical well sections, directional wells with various inclinations and even horizontal well sections, remarkably shortens the operation time and improves the operation efficiency.
Further, the hydraulic conduction cylinder comprises a first protruding part and a second protruding part which are distributed up and down, the outer wall of the first protruding part is in sliding fit with the inner wall of the valve rod, and the outer wall of the second protruding part is in dynamic seal fit with the inner wall of the bypass cover; the pressure of the pressure transmission cavity acts on the second protruding part.
Further, the bottom of the valve rod is provided with a boss extending inwards, and the boss is in sliding fit with the outer wall of the hydraulic transmission cylinder; the first protrusion can contact the boss in the descending process. In the descending process of the hydraulic conduction cylinder, the valve rod is not driven to synchronously descend at first until the first protruding part of the hydraulic conduction cylinder descends to the boss, and then the valve rod is driven to synchronously descend along with the descending of the hydraulic conduction cylinder. The purpose that this scheme set up is in order to guarantee that the hydraulic conduction section of thick bamboo is when beginning to descend, drives the disk seat and descends in step for valve ball and disk seat separation, the rotation of follow-up valve ball of being convenient for.
Further, the bottom end of the bypass cover is closed, the hydraulic conduction cylinder movably penetrates through the bottom end of the bypass cover, and the hydraulic conduction cylinder is in dynamic sealing fit with the bottom end of the bypass cover; the travel of the second projection downward to the bottom end of the bypass cover is greater than the travel of the first projection downward to contact the boss. The purpose that this scheme set up is guaranteed that hydraulic conduction section of thick bamboo decurrent stroke distance is greater than valve rod decurrent stroke distance, guarantees behind first bulge and the boss contact, still has the space of descending jointly.
Further, the bypass cover is provided with an inwardly extending mounting seat, the mounting seat is arranged below the boss, and the elastic piece is arranged between the mounting seat and the boss. In this way, the mounting base can be used to provide a mounting station for the bottom of the resilient member.
Further, the mounting seat is in dynamic sealing fit with the hydraulic transmission cylinder; the pressure transmission cavity is positioned between the mounting seat and the second protruding part. Therefore, the mounting seat is fixed with the bypass cover, and the bypass cover is fixed with the oil pipe joint, so that the pressure in the pressure transmission cavity cannot push the mounting seat to move and can only push the hydraulic transmission cylinder to act, and the hydraulic transmission cylinder can stably move downwards when the annular space is pressurized.
Further, the outer wall of the bypass cover is provided with a pressure transmission hole communicated with the pressure transmission cavity, and the pressure transmission hole is used for enabling the pressure in the pressure transmission cavity to be equal to the pressure in the oil sleeve annulus.
Further, a pressure stabilizing cavity is formed between the valve seat and the first protruding part and is positioned outside the hydraulic transmission cylinder and inside the valve rod; the hydraulic conduction cylinder is provided with a pressure stabilizing hole, and the pressure stabilizing hole is communicated with the pressure stabilizing cavity and the inside of the hydraulic conduction cylinder.
In this scheme, the inside of steady voltage chamber is hydraulic pressure conduction section of thick bamboo, outside be the valve rod, upper portion is the disk seat, lower part is first bulge. The pressure stabilizing hole has the function of ensuring the stable ascending of the hydraulic conduction cylinder and the valve rod in the process of closing the ball valve and reestablishing the oil extraction channel, and avoiding the pressure holding inside the tool.
Further, the valve seat is fixed at the top of the hydraulic transmission cylinder, and the outer wall of the valve seat is in sliding fit with the inner wall of the valve rod so as to ensure synchronous movement of the valve seat along with the hydraulic transmission cylinder.
Further, the elastic piece is a compression spring, and the restoring force of the compression spring can always provide a trend of upward movement for the valve rod, so that the valve ball is always kept closed when the annular space is not pressurized, and false starting caused by fluctuation of crude oil pressure in an oil pipe is avoided.
Compared with the prior art, the invention has the beneficial effects that:
(1) The circulation valve opened and closed by hydraulic pressure can be opened quickly by directly depending on the hydraulic pressure of well flushing liquid, and the well flushing is finished automatically and closed, so that a sliding sleeve does not need to be opened and closed respectively by adopting steel wire operation, and the problems of low efficiency, high risk and the like caused by the fact that the sliding sleeve is opened and closed by depending on the steel wire operation in the circulating well flushing process in the prior art are solved.
(2) The hydraulic open-close circulation valve can be used for vertical well sections, directional wells with various inclinations and even horizontal well sections.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic illustration of the connection of a valve stem to a hydraulic conductive cylinder in accordance with the present invention.
The graphic indicia are illustrated as follows:
1-bypass cover, 101-mount, 2-valve stem, 201-boss, 3-valve ball, 4-valve seat, 5-hydraulic conduction cylinder, 501-first projection, 502-second projection, the device comprises a 6-elastic piece, a 7-oil pipe joint, an 8-first flow passage, a 9-second flow passage, a 10-pressure transmission cavity, an 11-pressure transmission hole, a 12-pressure stabilization cavity and a 13-pressure stabilization hole.
Detailed Description
The invention is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
Example 1
As shown in fig. 1 to 3, the circulation valve for hydraulic opening and closing comprises an oil pipe joint 7 and a bypass cover 1 communicated with the oil pipe joint 7, wherein the bypass cover 1 comprises a valve ball 3, a valve seat 4 and a hydraulic transmission cylinder 5 which are distributed from top to bottom; the hydraulic transmission device further comprises a valve rod 2 which is in sliding fit with the hydraulic transmission cylinder 5, the top end of the valve rod 2 is in running fit with the valve ball 3, and an elastic piece 6 is arranged between the bottom of the valve rod 2 and the bypass cover 1; the valve seat further comprises a first flow passage 8 penetrating through the valve seat 4 and a second flow passage 9 penetrating through the hydraulic transmission cylinder 5 along the axial direction, and the first flow passage 8 and the second flow passage 9 are matched with each other; the hydraulic oil sleeve type hydraulic oil pump further comprises a pressure transmission cavity 10 which is positioned in the bypass cover 1 and is communicated with the oil sleeve annulus, and the pressure of the pressure transmission cavity 10 is used for driving the hydraulic transmission cylinder 5 to descend;
when the hydraulic conduction cylinder 5 is positioned at the top of the stroke, the valve ball 3 is closed, and the first flow passage 8 and the second flow passage 9 are mutually blocked;
when the hydraulic conduction cylinder 5 is at the bottom of the stroke, the valve ball 3 is opened and the first flow passage 8 and the second flow passage 9 communicate with each other.
In this embodiment, the male and female fastening ends of the oil pipe joint 7 are all oil pipe threads matched with corresponding oil pipes.
In the embodiment, a hydraulic control switch is formed by a bypass cover 1, a valve rod 2, a valve ball 3, a valve seat 4, a hydraulic transmission cylinder 5 and an elastic piece 6. Wherein the valve rod 2 is linked with the valve ball 3, and the valve ball 3 is controlled to rotate by the movement of the valve rod 2, so that the opening and closing actions are completed.
When the annular pressure cannot overcome the elastic force of the elastic member 6, the valve rod 2 is under the action of the elastic member 6, so that the valve ball 3 is in the closed position, i.e., the state shown in fig. 1.
When the annulus is pressurized, the hydraulic pressure acts on the hydraulic conduction cylinder 5 to enable the hydraulic conduction cylinder to move downwards, the valve rod 2 is driven to move downwards, the valve ball 3 is further driven to rotate by 90 degrees, the valve ball 3 is communicated with the upper runner and the lower runner, and annulus liquid enters the oil pipe to realize circulating well flushing. When the well flushing is stopped, the annular pressure is lost or balanced with the pressure in the oil pipe, the valve rod 2 moves upwards under the action of the elastic piece 6, and the valve ball 3 is driven to rotate by 90 degrees, so that the flow passage is closed. The valve rod can be easily realized by a person skilled in the art in a way of driving the valve ball to rotate up or down, which can be embodied in a test valve and/or a safety circulation valve in the field of oil testing (testing), such as an LPR-N test valve.
In this embodiment the unilateral maximum travel distance of the valve stem 2 is such that the valve ball is rotated exactly 90 °.
Example 2
This embodiment is similar to embodiment 1 except that it is based on embodiment 1:
as shown in fig. 1 and 2, the hydraulic conduction cylinder 5 comprises a first protruding part 501 and a second protruding part 502 which are distributed up and down, wherein the outer wall of the first protruding part 501 is in sliding fit with the inner wall of the valve rod 2, and the outer wall of the second protruding part 502 is in dynamic seal fit with the inner wall of the bypass cover 1; the pressure of the pressure transmitting chamber 10 acts on the second protrusion 502.
In the embodiment, the bottom of the valve rod 2 is provided with an inwardly extending boss 201, and the boss 201 is in sliding fit with the outer wall of the hydraulic transmission cylinder 5; the first projection 501 can contact the boss 201 during the downward movement.
In the embodiment, the bottom end of the bypass cover 1 is closed, the hydraulic conduction cylinder 5 movably penetrates through the bottom end of the bypass cover 1, and the hydraulic conduction cylinder 5 is in dynamic sealing fit with the bottom end of the bypass cover 1; the stroke of the second projection 502 moving downward to the bottom end of the bypass cover 1 is larger than the stroke of the first projection 501 moving downward to contact with the boss 201.
In this embodiment, the bypass cover 1 has an inwardly extending mounting seat 101, the mounting seat 101 is located below the boss 201, and the elastic member 6 is located between the mounting seat 101 and the boss 201.
As shown in fig. 2, the mounting seat 101 is in dynamic seal fit with the hydraulic conduction cylinder 5; the pressure transmission cavity 10 is located between the mounting seat 101 and the second protruding portion 502.
In this embodiment, the outer wall of the bypass cover 1 is provided with a pressure transmitting hole 11 communicated with the pressure transmitting cavity 10.
In the embodiment, a pressure stabilizing cavity 12 positioned outside the hydraulic transmission cylinder 5 and inside the valve rod 2 is formed between the valve seat 4 and the first protruding part 501; the hydraulic conduction cylinder 5 is provided with a pressure stabilizing hole 13, and the pressure stabilizing hole 13 is communicated with the pressure stabilizing cavity 12 and the inside of the hydraulic conduction cylinder 5.
Other structures and principles of this embodiment are the same as those of embodiment 1. In the embodiment, a hydraulic control switch is formed by a bypass cover 1, a valve rod 2, a valve ball 3, a valve seat 4, a hydraulic transmission cylinder 5 and an elastic piece 6. Wherein the valve rod 2 is linked with the valve ball 3, and the valve ball 3 is controlled to rotate by the movement of the valve rod 2, so that the opening and closing actions are completed.
When the annular pressure cannot overcome the elastic force of the elastic member 6, the valve rod 2 is under the action of the elastic member 6, so that the valve ball 3 is in the closed position, i.e., the state shown in fig. 1.
When the annulus is pressurized, the hydraulic pressure acts on the hydraulic conduction cylinder 5 to enable the hydraulic conduction cylinder to move downwards, the valve rod 2 is driven to move downwards, the valve ball 3 is further driven to rotate by 90 degrees, the valve ball 3 is communicated with the upper runner and the lower runner, and annulus liquid enters the oil pipe to realize circulating well flushing. When the well flushing is stopped, the annular pressure is lost or balanced with the pressure in the oil pipe, the valve rod 2 moves upwards under the action of the elastic piece 6, and the valve ball 3 is driven to rotate by 90 degrees, so that the flow passage is closed. The valve rod can be easily realized by a person skilled in the art in a way of driving the valve ball to rotate up or down, which can be embodied in a test valve and/or a safety circulation valve in the field of oil testing (testing), such as an LPR-N test valve.
Example 3
This embodiment is similar to embodiment 2 except that it is based on embodiment 1:
the valve seat 4 is fixed at the top of the hydraulic conduction cylinder 5, and the outer wall of the valve seat 4 is in sliding fit with the inner wall of the valve rod 2.
In this embodiment, the elastic member 6 is a compression spring.
Other structures and principles of this embodiment are the same as those of embodiment 2. In the embodiment, a hydraulic control switch is formed by a bypass cover 1, a valve rod 2, a valve ball 3, a valve seat 4, a hydraulic transmission cylinder 5 and an elastic piece 6. Wherein the valve rod 2 is linked with the valve ball 3, and the valve ball 3 is controlled to rotate by the movement of the valve rod 2, so that the opening and closing actions are completed.
When the annular pressure cannot overcome the elastic force of the elastic member 6, the valve rod 2 is under the action of the elastic member 6, so that the valve ball 3 is in the closed position, i.e., the state shown in fig. 1.
When the annulus is pressurized, the hydraulic pressure acts on the hydraulic conduction cylinder 5 to enable the hydraulic conduction cylinder to move downwards, the valve rod 2 is driven to move downwards, the valve ball 3 is further driven to rotate by 90 degrees, the valve ball 3 is communicated with the upper runner and the lower runner, and annulus liquid enters the oil pipe to realize circulating well flushing. When the well flushing is stopped, the annular pressure is lost or balanced with the pressure in the oil pipe, the valve rod 2 moves upwards under the action of the elastic piece 6, and the valve ball 3 is driven to rotate by 90 degrees, so that the flow passage is closed. The valve rod can be easily realized by a person skilled in the art in a way of driving the valve ball to rotate up or down, which can be embodied in a test valve and/or a safety circulation valve in the field of oil testing (testing), such as an LPR-N test valve.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. The hydraulic start-stop circulation valve is characterized by comprising an oil pipe joint (7), and a bypass cover (1) communicated with the oil pipe joint (7), wherein the bypass cover (1) comprises a valve ball (3), a valve seat (4) and a hydraulic transmission cylinder (5) which are distributed from top to bottom; the valve rod (2) is in sliding fit with the hydraulic transmission cylinder (5), the top end of the valve rod (2) is in rotating fit with the valve ball (3), and an elastic piece (6) is arranged between the bottom of the valve rod (2) and the bypass cover (1); a first flow passage (8) penetrating through the valve seat (4), and a second flow passage (9) penetrating through the hydraulic transmission cylinder (5) along the axial direction, wherein the first flow passage (8) and the second flow passage (9) are matched with each other; the pressure transmission cavity (10) is positioned in the bypass cover (1) and is communicated with the oil sleeve annulus, and the pressure of the pressure transmission cavity (10) is used for driving the hydraulic transmission cylinder (5) to descend; when the hydraulic conduction cylinder (5) is positioned at the top end of the stroke, the valve ball (3) is closed, and the first flow passage (8) and the second flow passage (9) are mutually blocked; when the hydraulic transmission cylinder (5) is positioned at the stroke bottom end, the valve ball (3) is opened, and the first flow passage (8) and the second flow passage (9) are communicated with each other;
the hydraulic conduction cylinder (5) comprises a first protruding part (501) and a second protruding part (502) which are distributed up and down, the outer wall of the first protruding part (501) is in sliding fit with the inner wall of the valve rod (2), and the outer wall of the second protruding part (502) is in dynamic seal fit with the inner wall of the bypass cover (1); the pressure of the pressure transmission cavity (10) acts on the second bulge (502);
the bottom of the valve rod (2) is provided with an inwardly extending boss (201), and the boss (201) is in sliding fit with the outer wall of the hydraulic transmission cylinder (5); the first projection (501) is capable of contacting the boss (201) during the downward movement.
2. The hydraulically opened and closed circulation valve according to claim 1, wherein the bottom end of the bypass cover (1) is closed, the hydraulic conduction cylinder (5) movably penetrates through the bottom end of the bypass cover (1), and the hydraulic conduction cylinder (5) is in movable sealing fit with the bottom end of the bypass cover (1); the travel of the second protruding part (502) moving downwards to the bottom end of the bypass cover (1) is larger than the travel of the first protruding part (501) moving downwards to be in contact with the boss (201).
3. The hydraulically opened and closed circulation valve according to claim 1, characterized in that the bypass cover (1) is provided with an inwardly extending mounting seat (101), the mounting seat (101) is located below the boss (201), and the elastic member (6) is located between the mounting seat (101) and the boss (201).
4. A hydraulically opened and closed circulation valve according to claim 3, characterized in that the mounting seat (101) is in dynamic sealing engagement with the hydraulic conducting cylinder (5); the pressure transmission cavity (10) is located between the mounting seat (101) and the second protruding portion (502).
5. The hydraulically opened and closed circulation valve according to claim 1, characterized in that the outer wall of the bypass cover (1) is provided with a pressure transmission hole (11) communicated with the pressure transmission cavity (10).
6. The hydraulically opened and closed circulation valve according to claim 1, characterized in that between the valve seat (4) and the first projection (501) a pressure stabilizing chamber (12) is formed, which is located outside the hydraulic conducting cylinder (5) and inside the valve stem (2); the hydraulic conduction cylinder (5) is provided with a pressure stabilizing hole (13), and the pressure stabilizing hole (13) is communicated with the pressure stabilizing cavity (12) and the inside of the hydraulic conduction cylinder (5).
7. The hydraulically opened and closed circulation valve according to claim 1, characterized in that the valve seat (4) is fixed on top of the hydraulic conduction cylinder (5), and the outer wall of the valve seat (4) is in sliding fit with the inner wall of the valve rod (2).
8. A hydraulically opened and closed circulation valve according to claim 1, characterized in that the elastic element (6) is a compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210623501.XA CN114961605B (en) | 2022-06-02 | 2022-06-02 | Hydraulic open-close circulation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210623501.XA CN114961605B (en) | 2022-06-02 | 2022-06-02 | Hydraulic open-close circulation valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114961605A CN114961605A (en) | 2022-08-30 |
| CN114961605B true CN114961605B (en) | 2023-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210623501.XA Active CN114961605B (en) | 2022-06-02 | 2022-06-02 | Hydraulic open-close circulation valve |
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| CN114961605A (en) | 2022-08-30 |
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