CN115354988B - Quick leaking stoppage valve capable of being opened and closed repeatedly - Google Patents
Quick leaking stoppage valve capable of being opened and closed repeatedly Download PDFInfo
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- CN115354988B CN115354988B CN202211292288.5A CN202211292288A CN115354988B CN 115354988 B CN115354988 B CN 115354988B CN 202211292288 A CN202211292288 A CN 202211292288A CN 115354988 B CN115354988 B CN 115354988B
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- circulating
- sliding sleeve
- short section
- hole
- leaking stoppage
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention discloses a quick leaking stoppage valve capable of being opened and closed repeatedly, which comprises an upper joint and a circulating short section, wherein the upper joint and the circulating short section are arranged up and down; a restrictor, a circulating sliding sleeve, a conical core and a plugging head are sequentially arranged in the circulating short section from top to bottom; the middle part of the leakage stopping valve is provided with a flow passage; the upper end of the restrictor is abutted with the lower end of the upper joint; the circulating sliding sleeve is arranged in the circulating short section through an elastic component, and the upper end of the circulating sliding sleeve is abutted against the lower end of the throttle; the plugging head is arranged at the bottom end inside the circulating short section; the lower end of the conical core is abutted with the upper end of the plugging head; the side walls of the circulating short section and the circulating sliding sleeve are respectively provided with a bypass hole and a side hole; when the circulating sliding sleeve moves, the bypass hole is communicated with the side hole, and the upper end of the conical core is matched with the lower end of the circulating sliding sleeve. The leakage plugging agent is suitable for frequent well sections of complex well leakage, a drilling tool does not need to be pulled down, the leakage plugging agent flows out from a bypass hole of the circulating short section, the bottom drilling tool assembly is prevented from being blocked and corroded, well control risks are effectively reduced, leakage plugging efficiency is improved, the structure is simple, and the leakage plugging agent is suitable for being widely used.
Description
Technical Field
The invention relates to the technical field of drilling, in particular to a quick leaking stoppage valve capable of being opened and closed repeatedly.
Background
Along with the deep exploration and development of oil and gas fields, the drilling geological conditions are complex, cracks of partial stratums develop, the pressure systems are complex, the technical difficulties of multiple pressure systems in the same open hole section, low stratum bearing capacity and the like are met, the lost circulation phenomenon generally exists, the caused underground complex conditions seriously restrict the drilling period, and the comprehensive cost of a single well is high.
When the directional drilling meets the well leakage, once the well leakage is caused, the leakage stopping material is needed to perform leakage stopping operation, but the leakage stopping material is easy to block downhole tools such as a downhole power drilling tool or a measurement while drilling tool, the internal structures of the tools are complex, precise and expensive, and once the tools are blocked by the leakage stopping material, the tools can fail. In order to prevent the leaking stoppage caused by the leaking stoppage drilling fluid, the drill is pulled out to throw off the directional instrument, and then the drill is lowered again to perform the leaking stoppage operation. However, when the well leaks from a deep well or an ultra-deep well, frequent lifting and replacing of the leaking stoppage drilling tool can greatly prolong the non-production operation time and seriously affect the well drilling time efficiency.
The prior art has at least the following problems:
1. the size of the plugging material is limited by the bottom drilling tool assembly, and the small-particle-size plugging material has poor plugging effect on fractured strata.
2. The complex lost circulation treatment cycle is long, and the time rate of the complex lost circulation is high. When the bridging plug plugging agent is used for plugging, a circulating pipeline, a filter, a screen and the like in a pump need to be removed, and during plugging, a drill tool combination needs to be replaced for plugging, so that the construction period is greatly increased, and meanwhile, the drilling fluid loss is large, and the speed and cost are not favorably increased.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a quick leaking stoppage valve capable of being opened and closed repeatedly, which can effectively control the occurrence of complex conditions in a well in an easily leaking area, can perform leaking stoppage operation at any time, can ensure the normal construction of underground tools such as measurement-while-drilling tools and the like in the easily leaking area, can timely treat the problems of blowout, drill sticking and the like caused by well leakage, and avoids the expansion of underground accidents.
In order to achieve the above purpose, the invention adopts the technical scheme that:
a multi-time switch quick leaking stoppage valve comprises an upper joint and a circulating short section which are arranged up and down; a restrictor, a circulating sliding sleeve, a conical core and a plugging head are sequentially arranged in the circulating short section from top to bottom; through holes are formed in the upper joint, the throttler, the circulating sliding sleeve, the conical core and the blocking head to form a flow channel; the upper end of the throttle is abutted with the lower end of the upper joint; the circulating sliding sleeve is installed inside the circulating short section through an elastic component, and the upper end of the circulating sliding sleeve is abutted to the lower end of the restrictor; the blocking head is arranged at the bottom end inside the circulating short section; the lower end of the conical core is abutted with the upper end of the plugging head; a side hole is formed in the side wall of the circulating short section, and a side hole is formed in the side wall of the circulating sliding sleeve; when the circulating sliding sleeve moves, the bypass hole is communicated with the side hole, and the upper end of the conical core is matched with the lower end of the circulating sliding sleeve.
As a preferred embodiment, the lower end of the upper joint is provided with an external thread, and the upper end of the circulating short section is provided with an internal thread; the external thread is meshed with the internal thread, the outer diameter of the upper joint is the same as that of the circulating short section, and the inner diameter of the lower end of the upper joint is smaller than that of the upper end of the circulating short section.
As a preferred embodiment, a guide piece is arranged in the side wall of the lower end of the circulating short section, and a stepped groove is formed in the outer surface of the lower end of the circulating sliding sleeve; the guide piece is matched with the stepped groove.
As a preferred embodiment, an installation platform is arranged inside the circulation short section, and the elastic component is arranged on the installation platform; the circulating sliding sleeve slides on the inner wall of the circulating short section through the elastic component.
In a preferred embodiment, the conical core comprises a conical part and a cylindrical part which are arranged up and down; the cone part is in a circular truncated cone shape with a small upper part and a big lower part, and the cylindrical part is provided with an annular hole; when the lower end of the circulating sliding sleeve is matched with the conical part, the lower end of the circulating sliding sleeve completely covers the annular hole.
As a preferred embodiment, the plugging head is provided with a disc hole, and the disc hole is communicated with the annular hole.
As a preferred embodiment, a limiting table is arranged inside the circulating short section and used for limiting the position of the upper end of the cylindrical part.
As a better implementation scheme, the blocking head is in threaded connection with the circulating short section, and the lower end of the blocking head is provided with an installation groove.
As a preferred embodiment, at least two bypass holes are uniformly formed in the circumference of the side wall of the circulating short section.
The invention has the beneficial effects that:
the invention provides a quick leaking stoppage valve capable of being opened and closed repeatedly, which is suitable for frequent well sections with complex well leakage, does not need to trip a drilling tool, enables a leaking stoppage agent to flow out from a bypass hole of a circulating short section, avoids blockage and corrosion of a bottom drilling tool assembly, can effectively reduce well control risks and improve leaking stoppage efficiency, and is simple in structure, simple to operate and suitable for wide application.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the apparatus of the present invention;
FIG. 3 is a schematic view of the connection between the upper joint and the circulation nipple of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 2 of the present invention;
FIG. 5 isbase:Sub>A cross-sectional view A-A of the present invention;
FIG. 6 is a schematic view of a cone core structure of the present invention;
fig. 7 is a schematic structural view of the plugging head of the present invention.
In the figure: 1. an upper joint; 2. circulating the short section; 3. a restrictor; 4. circulating the sliding sleeve; 5. an elastic member; 6. a conical core; 61. a pyramid part; 62. a cylindrical portion; 63. an annular aperture; 7. plugging the head; 71. a disc hole; 72. mounting grooves; 8. a side hole; 9. a bypass orifice; 10. a guide member; 11. a stepped groove; 12. an installation table; 13. and a limiting table.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1-7, the present embodiment provides a multi-switch quick leaking stoppage valve, which includes an upper joint 1 and a circulation nipple 2, which are vertically disposed; the circulating nipple 2 is internally provided with a throttler 3, a circulating sliding sleeve 4, a conical core 6 and a plugging head 7 in sequence from top to bottom; through holes are formed in the upper joint 1, the throttler 3, the circulating sliding sleeve 4, the conical core 6 and the plugging head 7 to form a flow channel; the upper end of the throttle 3 is abutted with the lower end of the upper joint 1; the circulating sliding sleeve 4 is installed inside the circulating short section 2 through an elastic component 5, and the upper end of the circulating sliding sleeve 4 is abutted to the lower end of the throttle 3; the blocking head 7 is arranged at the bottom end inside the circulating short section 2; the lower end of the conical core 6 is abutted with the upper end of the plugging head 7; a bypass hole 9 is formed in the side wall of the circulation nipple 2, and a side hole 8 is formed in the side wall of the circulation sliding sleeve 4; when the circulating sliding sleeve 4 moves, the bypass hole 9 is communicated with the side hole 8, and the upper end of the conical core 6 is matched with the lower end of the circulating sliding sleeve 4.
A quick leaking stoppage valve capable of being opened and closed repeatedly is characterized in that the lower end of an upper connector 1 is connected with the upper end of a circulation nipple 2, the upper end of the upper connector 1 is provided with internal threads, and the lower end of the circulation nipple 2 is provided with external threads which are respectively connected with an upper drilling tool and a lower drilling tool; and the upper end of the restrictor 3 is abutted with the lower end of the upper joint 1, and the upper joint 1 axially limits the restrictor 3. Through holes are formed in the upper joint 1, the throttler 3, the circulating sliding sleeve 4, the conical core 6 and the plugging head 7 to form a flow channel, so that the normal circulation of drilling fluid is ensured; the inner wall of the circulation nipple 2 slides up and down under the action of the elastic component 5 of the circulation sliding sleeve 4, the upper end of the circulation sliding sleeve 4 is abutted against the lower end of the throttle 3, the circulation sliding sleeve 4 drives the throttle 3 to slide when sliding, and the lower end of the upper joint 1 axially limits the throttle 3. The sealing head 7 is arranged at the bottom end of the circulation short section 2, the conical core 6 is arranged above the sealing head 7, and the lower end of the circulation sliding sleeve 4 is matched with the upper end of the sealing head 7. Seted up by-pass hole 9 on the 2 lateral walls of circulation nipple joint, seted up side opening 8 on the 4 lateral walls of circulation sliding sleeve, when 4 movements of circulation sliding sleeve were down, by-pass hole 9 and side opening 8 intercommunication, the shutoff operation of being convenient for. It is worth explaining that, the throttle 3 is installed between the upper joint 1 and the circulating sliding sleeve 4, the moving position of the throttle 3 is limited by the upper joint 1 and the circulating sliding sleeve 4, when the circulating sliding sleeve 4 moves downwards, the throttle 3 moves downwards to the lower end of the circulating sliding sleeve 4 along with the throttle 3 under the action of gravity to be matched with the upper end of the conical core 6; when the circulating sliding sleeve 4 is reset, the circulating sliding sleeve 4 is reset upwards to the upper joint 1 against the throttle 3. The diameters of the bypass holes 9 and the side holes 8 are required to allow the leakage stoppage material to pass through, and the large-size holes are adopted to ensure that the maximum particle size of the leakage stoppage material does not exceed 1/3 of the diameter of the bypass water hole. The throttler 3 is positioned at the upper end of the circulating sliding sleeve 4, a throttling hole is arranged in the throttler, the throttling hole is large in size, the upper end of the throttling hole is prevented from being subjected to pressure build-up when normal-flow drilling fluid flows through the throttling hole, and the upper end of the high-flow drilling fluid flows through the throttling hole to push the circulating sliding sleeve 4 to move downwards to open the plugging operation. Circulation sliding sleeve 4 relies on elastomeric element 5 to be connected with circulation nipple joint 2, and elastomeric element 5 can be the spring, and when elastomeric element 5 was in the reset state, circulation sliding sleeve 4 can seal by-pass hole 9, receives compressive force when elastomeric element 5, and circulation sliding sleeve 4 moves down, and side opening 8 and by-pass hole 9 butt joint intercommunication realize that circulation nipple joint 2 inside axial runner is connected with outside annular flow channel. The lower end of the conical core 6 is abutted against the blocking head 7, the upper end of the conical core is matched with the circulating sliding sleeve 4, the circulating sliding sleeve 4 is pressed to close the through hole in the conical core 6 after descending, so that the axial flow channel is closed, and the through hole in the conical core 6 can be opened when the conical core is reset to ascend, so that the axial flow channel is opened. In a preferred embodiment, a threaded female drill pipe fastener is designed on the upper part of the upper connector 1 and is connected with an upper drill pipe through a threaded male fastener. The lower part of the circulation short section 2 is provided with a thread male buckle for a drill rod, and the thread male buckle is connected with a thread female buckle of the lower drill rod.
Example 2
As shown in fig. 1 to 7, the present embodiment is developed on the basis of the above embodiments, and specifically, the present embodiment provides a multi-switch quick leaking stoppage valve, wherein the lower end of the upper joint 1 is provided with an external thread, and the upper end of the circulation nipple 2 is provided with an internal thread; the external thread is meshed with the internal thread, the upper joint 1 is connected with the circulation nipple 2 through threads, and the disassembly and the assembly are convenient. And the outer diameter of the upper joint 1 is the same as that of the circulating short section 2, so that the outer diameter of the device is ensured to be the same, and the drilling operation is facilitated. The internal diameter of the lower end of the upper joint 1 is smaller than the internal diameter of the upper end of the circulation short section 2, so that the upper joint 1 can limit the lower throttle 3.
As a preferred embodiment, a guide piece 10 is arranged in the side wall of the lower end of the circulation short section 2, and a stepped groove 11 is formed in the outer surface of the lower end of the circulation sliding sleeve 4; the guide 10 is engaged with the stepped groove 11. In the preferred scheme, guide 10 is the uide pin, has seted up the uide pin hole on the 4 lower extreme lateral walls of circulation sliding sleeve, and the uide pin passes 2 lateral walls of circulation nipple joint and imbeds the uide pin hole, and the uide pin cooperates with ladder groove 11, forms the axial spacing when the operation is ended and opened down in circulation sliding sleeve 4, slows down the impact force to awl core 6. The lateral wall of the circulation nipple 2 is provided with a bypass hole 9, the lateral wall of the circulation sliding sleeve 4 is provided with a side hole 8, and when the circulation sliding sleeve 4 moves downwards, the side hole 8 can be aligned with the bypass hole 9, so that the plugging operation is convenient.
As a preferred embodiment, a mounting table 12 is arranged inside the circulation nipple 2, and the elastic component 5 is arranged on the mounting table 12; the circulating sliding sleeve 4 slides on the inner wall of the circulating short section 2 through the elastic component 5.
In a preferred embodiment, the conical core 6 comprises a conical part 61 and a cylindrical part 62 which are arranged up and down; the cone part 61 is in a shape of a circular truncated cone with a small upper part and a big lower part, and the cylindrical part 62 is provided with an annular hole 63; when the lower end of the circulating sliding sleeve 4 is matched with the conical part 61, the lower end of the circulating sliding sleeve 4 completely covers the annular hole 63. At the moment, a flow channel in the device is closed, the side hole 8 of the circulating sliding sleeve 4 is communicated with the bypass hole 9 of the circulating short section 2, fluid flows into the annular space of the well through the bypass hole 9 of the circulating short section 2, and at the moment, the fluid is downwards fed into the well and is blocked by the plugging agent.
As a preferred embodiment, a plugging head 7 is disposed on the plugging head 7, and the plugging head 7 is communicated with the annular hole 63. Preferably, the plugging heads 7 and the annular hole 63 are uniformly arranged on the circumference, so that the drilling fluid can normally flow out through the flow channel of the plugging valve without leaking stoppage, and the drilling operation is not influenced.
As a preferred embodiment, a limiting table 13 is arranged inside the circulation nipple 2, and the limiting table 13 is used for limiting the upper end position of the cylindrical portion 62, so that the precise installation of the conical core 6 is realized.
As a preferred embodiment, the plugging head 7 is in threaded connection with the circulation nipple 2, and a mounting groove 72 is formed at the lower end of the plugging head 7, and the mounting groove 72 is used for installing the plugging head 7 by screwing an external tool into the circulation nipple 2.
As a better embodiment, the side wall of the circulation nipple 2 is evenly provided with at least two bypass holes 9 on the circumference, so that the plugging agent can uniformly flow out conveniently and the plugging is uniform.
Example 3
As shown in fig. 1 to 7, the present embodiment is developed on the basis of the above embodiments, and specifically, the present embodiment provides an operating principle of a quick leaking stoppage valve which is opened and closed many times, as follows:
firstly, determining a well section with frequent complex lost circulation, and connecting a quick leaking stoppage valve in a drilling tool assembly; during normal drilling and production operation, the flow of drilling fluid is relatively small, no pressure build-up is formed at the upper end of the restrictor 3, the pressure difference between the upper end and the lower end of the restrictor 3 is not enough to compress the spring to enable the circulating sliding sleeve 4 to move downwards, and the drilling fluid flows into the annular hole 63 of the conical core 6 through the axial through hole of the circulating sliding sleeve 4 and flows out to the bottom of the well through the plugging head 7 of the plugging head 7;
when taking place the lost circulation, increase drilling fluid flow, make throttle 3 because its inside orifice effect forms the suppress pressure in the upper end, throttle 3 upper and lower end pressure difference promotes throttle 3 and 4 compression spring of circulation sliding sleeve make circulation sliding sleeve 4 down, when circulation sliding sleeve 4 down to leaning on in the awl core 6 time, 4 axial flow path of circulation sliding sleeve are closed, and circulation sliding sleeve 4's side opening 8 and circulation nipple joint 2's by pass hole 9 switch-on, the fluid is through 2 by pass hole 9 inflow annular space well of circulation nipple joint, go into equal discharge capacity plugging agent and block this moment.
After the plugging is completed, the spring resets because the upper end of the throttleer 3 has no liquid pressure, and drives the throttleer 3 and the circulating sliding sleeve 4 to move upwards until the throttleer 3 abuts against the upper joint 1 to perform axial limiting, so that the tool reset is completed. When the plugging measure needs to be carried out again, the operation is repeated. This device is fit for the leaking stoppage work of the frequent well section of complicated lost circulation, need not to take off the drilling tool, makes the leaking stoppage agent flow out from circulation nipple joint 2 by pass hole 9, avoids blockking up and corrodes bottom drilling tool combination, can effectively reduce well accuse risk and improve leaking stoppage efficiency, simple structure, and easy operation is fit for using widely.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a quick leaking stoppage valve of multiple switch which characterized in that: comprises an upper joint (1) and a circulating short section (2) which are arranged up and down; the circulating short section (2) is internally provided with a throttler (3), a circulating sliding sleeve (4), a conical core (6) and a plugging head (7) in sequence from top to bottom; through holes are formed in the upper joint (1), the throttler (3), the circulating sliding sleeve (4), the conical core (6) and the plugging head (7) to form a flow channel; the upper end of the throttle (3) is abutted against the lower end of the upper joint (1); the circulating sliding sleeve (4) is installed inside the circulating short section (2) through an elastic component (5), and the upper end of the circulating sliding sleeve (4) is abutted against the lower end of the throttle (3); the blocking head (7) is arranged at the bottom end inside the circulating short section (2); the lower end of the conical core (6) is abutted against the upper end of the plugging head (7); a bypass hole (9) is formed in the side wall of the circulation nipple (2), and a side hole (8) is formed in the side wall of the circulation sliding sleeve (4); when the circulating sliding sleeve (4) moves, the bypass hole (9) is communicated with the side hole (8), and the upper end of the conical core (6) is matched with the lower end of the circulating sliding sleeve (4);
the cone core (6) comprises a cone part (61) and a cylinder part (62) which are arranged up and down; the cone part (61) is in a circular truncated cone shape with a small upper part and a big lower part, and the cylindrical part (62) is provided with an annular hole (63); when the lower end of the circulating sliding sleeve (4) is matched with the pyramid part (61), the lower end of the circulating sliding sleeve (4) completely covers the annular hole (63).
2. A multiple-switch quick leaking stoppage valve as claimed in claim 1, wherein: the lower end of the upper joint (1) is provided with an external thread, and the upper end of the circulating short section (2) is provided with an internal thread; the external thread is meshed with the internal thread, the outer diameter of the upper joint (1) is the same as that of the circulation short section (2), and the inner diameter of the lower end of the upper joint (1) is smaller than that of the upper end of the circulation short section (2).
3. A multiple-switch quick leaking stoppage valve as claimed in claim 1, wherein: a guide piece (10) is arranged in the side wall of the lower end of the circulating short section (2), and a stepped groove (11) is formed in the outer surface of the lower end of the circulating sliding sleeve (4); the guide piece (10) is matched with the stepped groove (11).
4. A multiple-switch quick leaking stoppage valve as claimed in claim 1, wherein: an installation table (12) is arranged inside the circulating short section (2), and the elastic component (5) is arranged on the installation table; the circulating sliding sleeve (4) slides on the inner wall of the circulating short section (2) through the elastic component (5).
5. A multiple-switch quick leaking stoppage valve as claimed in claim 1, wherein: and a disc hole (71) is formed in the blocking head (7), and the disc hole (71) is communicated with the annular hole (63).
6. A multiple-switch quick leaking stoppage valve as claimed in claim 1, wherein: and a limiting table (13) is arranged in the circulating short section (2), and the limiting table (13) is used for limiting the upper end position of the cylindrical part (62).
7. A multiple-switch quick leaking stoppage valve as claimed in claim 1, wherein: the blocking head (7) is in threaded connection with the circulating short section (2), and a mounting groove (72) is formed in the lower end of the blocking head (7).
8. A multiple-switch quick leaking stoppage valve as claimed in claim 1, wherein: at least two bypass holes (9) are uniformly formed in the side wall of the circulating short section (2) in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211292288.5A CN115354988B (en) | 2022-10-21 | 2022-10-21 | Quick leaking stoppage valve capable of being opened and closed repeatedly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211292288.5A CN115354988B (en) | 2022-10-21 | 2022-10-21 | Quick leaking stoppage valve capable of being opened and closed repeatedly |
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| Publication Number | Publication Date |
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| CN115354988A CN115354988A (en) | 2022-11-18 |
| CN115354988B true CN115354988B (en) | 2023-01-03 |
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| CN202211292288.5A Active CN115354988B (en) | 2022-10-21 | 2022-10-21 | Quick leaking stoppage valve capable of being opened and closed repeatedly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116122767B (en) * | 2022-12-22 | 2023-12-22 | 靖边县铠泓商贸有限责任公司 | Petroleum drilling plugging device and plugging method |
| CN116950606B (en) * | 2023-08-21 | 2024-03-19 | 奥瑞拓能源科技股份有限公司 | Circulation leakage blocking valve and control method |
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