CN111322424A - Bidirectional cylindrical spring plug valve - Google Patents
Bidirectional cylindrical spring plug valve Download PDFInfo
- Publication number
- CN111322424A CN111322424A CN202010264161.7A CN202010264161A CN111322424A CN 111322424 A CN111322424 A CN 111322424A CN 202010264161 A CN202010264161 A CN 202010264161A CN 111322424 A CN111322424 A CN 111322424A
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- Prior art keywords
- hole
- ball seat
- key
- valve body
- seat assembly
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0647—Spindles or actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/204—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the plugs or parts of the plugs mechanically pressing the seals against the housing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a bidirectional cylindrical spring plug valve, which comprises a valve body (10); a ball core (20) is arranged in the valve body (10); one side of the ball core (20) is connected with the operating key (30), the upper end and the lower end of the ball core (20) are respectively provided with a ball seat assembly (40), and the top of the ball seat assembly (40) at the upper end of the ball core (20) is sequentially provided with a pressure plate (50), an assembling ring (60), a support ring (70) and a circlip for hole (80) from bottom to top. The invention reduces the number of parts and the consumption of parts materials to the utmost extent, reduces the processing difficulty to the utmost extent on the premise of improving the strength safety of the tool, can save the assembling and disassembling time, realizes the opening and closing with pressure under certain pressure, not only can improve the reliability and the safety of the plug valve, but also effectively improves the cost performance of the product. The bidirectional cylindrical spring plug valve is suitable for high-pressure plug valves with double operating keys, drill rod plug valves, top drive plug valves, drill rod safety valves or oil pipe plug valves.
Description
Technical Field
The invention relates to a bidirectional cylindrical spring plug valve, and belongs to the technical field of oilfield equipment.
Background
The plug valve is used as an internal blowout prevention ball valve of a drilling tool, is widely applied to drilling and workover construction operation at home and abroad, and is used for isolating or communicating liquid in a drill string water hole. The drilling fluid of the plug valve is opened to enter the drill string in the normal drilling process, and the plug valve is closed when a single joint is connected, so that the drilling fluid can be prevented from splashing on a well platform, the waste of the drilling fluid is avoided, and the environment-friendly requirement is met; when accidents such as well kick, blowout and the like happen underground, the plug valve is closed in time, so that combustible gas or liquid can be prevented from overflowing out of a well mouth, and casualties and property loss are prevented.
The plug valves commonly used in the existing market have the disadvantages of complex structure, difficult assembly, unstable pressing, difficult qualified pressure test and difficult batch production; and a deeper annular groove is cut on the inner hole of the body, so that the strength is low, stress concentration is generated, fracture is easy to generate, and new potential safety hazards are brought. The existing plug valve is large in number of parts, an upper ball seat and a lower ball seat or a valve seat are not universal, the body is low in strength, inconvenient to process and manage, inconvenient to assemble and disassemble, time-consuming and labor-consuming, and unstable in pressing after assembly. Therefore, the prior art still has the defects and needs to be further improved.
Disclosure of Invention
The invention aims to provide a bidirectional cylindrical spring plug valve, which aims to reduce the number of parts and the consumption of part materials to the maximum extent, reduce the processing difficulty to the maximum extent on the premise of improving the strength safety of a tool, save the assembling and disassembling time, realize the press opening and press closing under certain pressure, improve the reliability and safety of the plug valve, effectively improve the cost performance of a product and overcome the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a bidirectional cylindrical spring plug valve, which comprises a valve body; a ball core is arranged in the valve body; ball core one side and operation key-type connection, both ends are equipped with the ball seat subassembly respectively about the ball core, and the ball seat subassembly top of ball core upper end is equipped with pressure disk, piece together ring, support ring and circlip for the hole by supreme down in proper order.
In the bidirectional cylindrical spring plug valve, the valve body is of a circular tubular structure; the inner hole of the valve body is a smooth through hole, an inner step is arranged in the smooth through hole, a ball seat assembly is arranged at the inner step, and a key hole is formed in one side of the valve body, which corresponds to the ball core; a pair of fan-shaped grooves and a pair of fan-shaped keys are arranged on the inner sides of the key holes; the side wall of the keyhole is provided with a sealing groove for mounting a sealing ring; the upper part of the inner hole of the valve body is provided with a splicing ring groove used for installing a splicing ring.
In the bidirectional cylindrical spring plug valve, the ball core is of a spherical structure; the ball core is provided with a through hole; an operating platform parallel to the through hole is arranged on one side of the ball core, a key groove is arranged on the operating platform, and a small hole communicated with the through hole is formed in the center of the key groove.
In the bidirectional cylindrical spring plug valve, the operating key is a reducing cylinder; the large-diameter bottom surface of the operation key is provided with a screwing key which is matched and connected with the key groove; the large-diameter top surface of an operation key on the ball core is provided with a pair of limiting keys, and the limiting keys are positioned in a pair of fan-shaped grooves of a key hole on the valve body; the small-diameter center of the operation key is provided with a screwing hole which is a square hole or a hexagonal hole; the bottom of the screwing hole is provided with a threaded hole; the small diameter end face of the operation key is provided with an indication groove for indicating the switch state.
In the bidirectional cylindrical spring plug valve, the ball seat assembly comprises an upper ball seat assembly and a lower ball seat assembly; the upper ball seat assembly and the lower ball seat assembly have the same structure; the ball seat assembly consists of a ball seat and a group of springs; the ball seat is in a circular tube shape; the orifice at one end of the ball seat, which is in contact with the ball core, is an inner spherical surface; the other end of the ball seat is provided with a group of spring holes which are uniformly distributed along the circumference, and a spring is arranged in each spring hole; the spring in the upper ball seat assembly is pressed against the pressure plate, and the spring in the lower ball seat assembly is pressed against the inner step of the valve body.
In the bidirectional cylindrical spring plug valve, the splicing ring is provided with an L-shaped notch for installing the support ring; the splicing ring is a circular ring structure formed by splicing four fan-shaped blocks, so that the splicing ring can be conveniently arranged in a splicing ring groove of an inner hole of the valve body; a retainer ring groove is formed in the side face of the L-shaped notch, and an elastic retainer ring for holes is arranged in the retainer ring groove; the elastic retainer ring for the hole plays a role in limiting the parts in the valve body hole to withdraw.
By adopting the technical scheme, the invention adopts the bidirectional cylindrical spring structure, so that the circle center of the ball core is automatically aligned with the axis line of the operation key, high-pressure and low-pressure sealing is facilitated during sealing and pressing tests of the upper end and the lower end of the plug valve, the pressing qualification rate is improved, pressing opening and pressing closing under certain pressure can be realized, the plug valve is particularly suitable for occasions with shortened combined height after the ball core and the ball seat are worn after use, and the repeated use times of the ball core assembly are improved. The structure of the upper ball seat assembly and the lower ball seat assembly is unified, the ball seat assemblies are standardized, the upper ball seat assembly and the lower ball seat assembly can be used interchangeably, and production management and repeated utilization of maintenance pieces are facilitated; the excircle of the ball seat in the ball seat assembly is a cylinder, so that the processing difficulty is reduced. The spring adopts standard spring, can satisfy the power value requirement according to the power value adjustment standard spring quantity of demand. The operating key and the key hole adopt a double-fan-shaped structure, the 90-degree rotation limiting of the switch is realized, the sealing groove is designed in the key hole, the structure is simple, the installation and the disassembly are convenient, the diameter of the key hole is small, and the strength of the valve body is improved; the upper end face of the upper ball seat assembly is provided with the pressure plate, so that the ball seat is uniformly stressed, and the ring splicing installation is convenient. The bidirectional cylindrical spring plug valve is suitable for high-pressure plug valves with double operating keys, drill rod plug valves, top drive plug valves, drill rod safety valves or oil pipe plug valves.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is an axial cross-sectional view of the present invention.
The labels in the figures are: 10-valve body, 11-smooth through hole, 12-inner step, 13-keyhole, 14-sector groove, 15-sector key, 16-seal groove, 17-splicing ring groove, 20-ball core, 21-through hole, 22-operation platform, 23-key groove, 24-small hole, 30-operation key, 31-screwing key, 32-limit key, 33-screwing hole, 34-threaded hole, 35-indication groove, 40-ball seat component, 41-ball seat, 42-spring, 43-inner spherical surface, 44-spring hole, 50-pressure plate, 60-splicing ring, 61-, 62-sector block, 63-retaining ring groove, 70-support ring and elastic retaining ring for 80-hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention discloses a bidirectional cylindrical spring plug valve, as shown in figure 1, the main structure of the plug valve comprises a valve body 10; a ball core 20 is arranged in the valve body 10; one side of the ball core 20 is connected with the operation key 30, the ball seat assembly 40 is respectively arranged at the upper end and the lower end of the ball core 20, and the pressure plate 50, the splicing ring 60, the support ring 70 and the circlip 80 for holes are sequentially arranged at the top of the ball seat assembly 40 at the upper end of the ball core 20 from bottom to top.
The specific structure is shown in fig. 2, the valve body 10 is a circular tubular structure; an inner hole of the valve body 10 is a smooth through hole 11, an inner step 12 is arranged in the smooth through hole 11, a ball seat assembly 40 is arranged at the inner step 12, and a key hole 13 is arranged on one side of the valve body 10 corresponding to the ball core 20; a pair of fan-shaped grooves 14 and a pair of fan-shaped keys 15 are arranged on the inner side of the key hole 13; a sealing groove 16 for installing a sealing ring is arranged on the side wall of the key hole 13; the upper part of the inner hole of the valve body 10 is provided with a splicing ring groove 17 for installing a splicing ring 60. The core 20 is a spherical structure; the ball core 20 is provided with a through hole 21; an operation platform 22 parallel to the through hole 21 is arranged on one side of the ball core 20, a key groove 23 is arranged on the operation platform 22, and a small hole 24 communicated with the through hole 21 is arranged in the center of the key groove 23. The operation key 30 is a variable diameter cylinder; the large-diameter bottom surface of the operating key 30 is provided with a screwing key 31, and the screwing key 31 is matched and connected with the key groove 23; the large-diameter top surface of the operating key 30 on the ball core 20 is provided with a pair of limit keys 32, and the limit keys 32 are positioned in a pair of fan-shaped grooves 14 of the key hole 13 on the valve body 10; the small-diameter center of the operation key 30 is provided with a screwed hole 33, and the screwed hole 33 is a square hole or a hexagonal hole; the bottom of the screwing hole 33 is provided with a threaded hole 34; the small diameter end face of the operation key 30 is provided with an indication groove 35 for indicating the switch state. The ball seat assembly 40 includes an upper ball seat assembly and a lower ball seat assembly; the upper ball seat assembly and the lower ball seat assembly have the same structure; the ball seat assembly 40 is composed of a ball seat 41 and a set of springs 42; the ball seat 41 is in a circular tube shape; the orifice of the ball seat 41 at the end contacting the ball core 20 is an inner spherical surface 43; the other end of the ball seat 41 is provided with a group of spring holes 44 which are uniformly distributed along the circumference, and a spring 42 is arranged in each spring hole 44; the spring 42 in the upper seat assembly bears against the pressure plate 50 and the spring 42 in the lower seat assembly bears against the inner step 12 of the valve body 10. The split ring 60 is provided with an L-notch 61 for mounting the support ring 70; the splicing ring 60 is a circular ring structure formed by splicing four fan-shaped blocks 62, so that the splicing ring can be conveniently arranged in the splicing ring groove 17 of the inner hole of the valve body 10; a retainer ring groove 63 is formed in the side face of the L-shaped notch 61, and an elastic retainer ring 80 for holes is arranged in the retainer ring groove 63; the circlip 80 for bore functions to limit the withdrawal of parts within the bore of the valve body 10.
The invention is described in addition below:
the inner step 12 of the valve body 10 is provided with a lower ball seat assembly, a ball core 20, an upper ball seat assembly and a pressure plate 50 from bottom to top in sequence; an annular splicing groove 17 is formed in an inner hole of the valve body 10 above the pressure plate 50, and an annular splicing ring 60, a support ring 70 and a hole circlip 80 are installed in the annular splicing groove 17; the hole circlip 80 is used for limiting all parts in the inner hole of the valve body 10 from withdrawing; one side of the valve body 10 is provided with a keyhole 13, the keyhole 13 is a sealing hole with a step, the end surface of the step is provided with a pair of fan-shaped grooves 14, the fan-shaped grooves 14 are matched with a pair of limiting keys 32 on the operation key 30, so that the operation key 30 can only rotate within a 90-degree range and is used for driving the ball core 20 to rotate within the 90-degree range, and the effect of opening or closing the bidirectional cylindrical spring plug valve is realized. Sealing grooves 16 are respectively arranged in the holes of the valve body 10 and the upper and lower ball seat assemblies 40 and in the key hole 13 matched with the valve body 10 and the operating key 30, and sealing rings are arranged in the sealing grooves 16 to jointly realize plug valve sealing.
One end of the operating key 30 is a small-diameter section, and the other end is a large-diameter section; the operation key 30 is pushed out when the pressure in the water hole is avoided. The center of the small diameter section of the operating key 30 is provided with a screwed hole 33, and the screwed hole 33 adopts an inner hexagonal or inner square hole for installing a wrench. The large-diameter section and the small-diameter section of the operating key 30 are connected with the step end face provided with a pair of limiting keys 32, and the limiting keys 32 are matched with the fan-shaped grooves 14 in the key holes 13 on the valve body 10, so that the limiting keys 32 on the operating key 30 can only slide and rotate for 90 degrees in the key holes 13, and 90-degree rotary switch of the ball valve is realized. The end face of the large-diameter section of the operation key 30 is provided with a screwing key 31, the screwing key 31 is matched with the key groove 23 on the ball core 20, the screwing key 31 and the key groove 23 are in a straight line shape, and the screwing key 31 is embedded into the key groove 23 in the center of the ball core 20, so that the operation key 30 and the ball core 20 are in rotary linkage.
The ball seat assembly 40 includes a ball seat 41 and a spring 42. Ball seat 41 is the ring structure, and the hole is equipped with annular groove, and ball seat 41 one end is equipped with a set of spring hole 44 along circumference evenly distributed, and spring hole 44 is the light blind hole, installs spring 42 in the spring hole 44, and spring 42 adopts the cylinder spring. The orifice at the other end of the ball seat 41 is in sealing fit with the outer spherical surface of the ball core 20; the matching surface of the ball seat 41 and the ball core 20 is an inner spherical surface 43. The ball seat assembly 40 has two sets, and the two sets are identical in structure and can be used interchangeably. When the ball seat assembly is installed, two sets of ball seat assemblies 40 are respectively installed at the upper end and the lower end of the ball core 20, the inner spherical surface 43 of the ball seat 41 is in contact with the ball core 20, and the spring 42 is located at the side far away from the ball core 20. The spring 42 at the lower end is pressed against the top surface of the inner step 12 of the valve body 10, and the spring 42 at the upper end is pressed against the bottom surface of the pressure plate 50, so that the inner spherical surfaces 43 of the upper ball seat 41 and the lower ball seat 41 are tightly contacted with the outer spherical surface of the ball core 20 to form a bidirectional cylindrical spring structure, thereby improving the sealing effect of the plug valve. The pressure plate 50 is of a circular ring structure and is mounted above the upper ball seat and pressed against the spring 42 in the upper ball seat.
The bidirectional cylindrical spring plug valve is suitable for high-pressure plug valves with double operating keys, drill rod plug valves, top drive plug valves, drill rod safety valves or oil pipe plug valves.
Claims (6)
1. A bidirectional cylindrical spring plug valve comprises a valve body (10); the method is characterized in that: a ball core (20) is arranged in the valve body (10); one side of the ball core (20) is connected with the operating key (30), the upper end and the lower end of the ball core (20) are respectively provided with a ball seat assembly (40), and the top of the ball seat assembly (40) at the upper end of the ball core (20) is sequentially provided with a pressure plate (50), an assembling ring (60), a support ring (70) and a circlip for hole (80) from bottom to top.
2. The bidirectional cylindrical spring plug valve of claim 1, wherein: the valve body (10) is of a circular tubular structure; an inner hole of the valve body (10) is a smooth through hole (11), an inner step (12) is arranged in the smooth through hole (11), a ball seat assembly (40) is installed at the inner step (12), and a key hole (13) is formed in one side of the valve body (10) corresponding to the ball core (20); a pair of fan-shaped grooves (14) and a pair of fan-shaped keys (15) are arranged on the inner side of the key hole (13); a sealing groove (16) for mounting a sealing ring is arranged on the side wall of the key hole (13); the upper part of the inner hole of the valve body (10) is provided with a splicing ring groove (17) for installing a splicing ring (60).
3. The bidirectional cylindrical spring plug valve of claim 1, wherein: the ball core (20) is of a spherical structure; the ball core (20) is provided with a through hole (21); an operating platform (22) parallel to the through hole (21) is arranged on one side of the ball core (20), a key groove (23) is arranged on the operating platform (22), and a small hole (24) communicated with the through hole (21) is formed in the center of the key groove (23).
4. The bidirectional cylindrical spring plug valve of claim 3, wherein: the operating key (30) is a variable-diameter cylinder; the large-diameter bottom surface of the operating key (30) is provided with a screwing key (31), and the screwing key (31) is matched and connected with the key groove (23); the large-diameter top surface of an operating key (30) on the ball core (20) is provided with a pair of limiting keys (32), and the limiting keys (32) are positioned in a pair of fan-shaped grooves (14) of a key hole (13) on the valve body (10); the small-diameter center of the operating key (30) is provided with a screwed hole (33), and the screwed hole (33) is a square hole or a hexagonal hole; the bottom of the screwing hole (33) is provided with a threaded hole (34); the small diameter end face of the operation key (30) is provided with an indication groove (35) for indicating the switch state.
5. The bidirectional cylindrical spring plug valve of claim 1, wherein: the ball seat assembly (40) comprises an upper ball seat assembly and a lower ball seat assembly; the upper ball seat assembly and the lower ball seat assembly have the same structure; the ball seat assembly (40) is composed of a ball seat (41) and a group of springs (42); the ball seat (41) is in a circular tube shape; the orifice at one end of the ball seat (41) contacting the ball core (20) is an inner spherical surface (43); the other end of the ball seat (41) is provided with a group of spring holes (44) which are uniformly distributed along the circumference, and a spring (42) is arranged in each spring hole (44); the spring (42) in the upper ball seat assembly is pressed against the pressure plate (50), and the spring (42) in the lower ball seat assembly is pressed against the inner step (12) of the valve body (10).
6. The bidirectional cylindrical spring plug valve of claim 1, wherein: the splicing ring (60) is provided with an L-shaped notch (61) for mounting the support ring (70); the splicing ring (60) is a circular ring structure formed by splicing four fan-shaped blocks (62) and is conveniently arranged in a splicing ring groove (17) of an inner hole of the valve body (10); a retainer ring groove (63) is formed in the side face of the L-shaped notch (61), and an elastic retainer ring (80) for holes is arranged in the retainer ring groove (63); the circlip (80) for the hole plays a role in limiting the parts in the hole of the valve body (10) to withdraw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264161.7A CN111322424A (en) | 2020-04-07 | 2020-04-07 | Bidirectional cylindrical spring plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010264161.7A CN111322424A (en) | 2020-04-07 | 2020-04-07 | Bidirectional cylindrical spring plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111322424A true CN111322424A (en) | 2020-06-23 |
Family
ID=71166055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010264161.7A Pending CN111322424A (en) | 2020-04-07 | 2020-04-07 | Bidirectional cylindrical spring plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111322424A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943963A (en) * | 2021-02-09 | 2021-06-11 | 贵州高峰石油机械股份有限公司 | Integral safety valve |
| CN113565984A (en) * | 2021-08-10 | 2021-10-29 | 西南石油大学 | Secondary well completion oil reservoir isolation valve |
-
2020
- 2020-04-07 CN CN202010264161.7A patent/CN111322424A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112943963A (en) * | 2021-02-09 | 2021-06-11 | 贵州高峰石油机械股份有限公司 | Integral safety valve |
| CN112943963B (en) * | 2021-02-09 | 2024-05-28 | 贵州高峰石油机械股份有限公司 | Integral relief valve |
| CN113565984A (en) * | 2021-08-10 | 2021-10-29 | 西南石油大学 | Secondary well completion oil reservoir isolation valve |
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