CN110195574B - Cylindrical back pressure valve - Google Patents
Cylindrical back pressure valve Download PDFInfo
- Publication number
- CN110195574B CN110195574B CN201810156415.6A CN201810156415A CN110195574B CN 110195574 B CN110195574 B CN 110195574B CN 201810156415 A CN201810156415 A CN 201810156415A CN 110195574 B CN110195574 B CN 110195574B
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- valve
- cylindrical
- seat
- back pressure
- assembly
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- 238000007789 sealing Methods 0.000 claims description 31
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 15
- 238000005553 drilling Methods 0.000 description 14
- 239000012530 fluid Substances 0.000 description 7
- 230000005484 gravity Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Multiple-Way Valves (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a cylindrical back pressure valve, which comprises a valve body, wherein a valve seat, a cylindrical valve core and a directional sleeve are assembled in an inner cavity of the valve body, one end of the cylindrical valve core, which is positioned on the directional sleeve, is assembled on the directional sleeve through an assembling structure, the assembling structure comprises a guide post on the cylindrical valve core and an assembling hole which is arranged on the directional sleeve, an assembling seat which can axially and bidirectionally move along the valve body is sleeved in the assembling hole, the guide post is sleeved in the assembling seat and can axially and bidirectionally move along the valve body, an elastic piece is arranged between the assembling seat and the directional sleeve to provide elastic force for the assembling seat towards the valve seat, and the assembling seat is provided with a guide groove and an oblique limiting groove to realize locking and releasing of the position of the assembling seat in cooperation with convex teeth in the assembling hole, so that normally open and normally closed control of the valve is realized.
Description
Technical Field
The invention relates to a drilling tool, in particular to a cylindrical back pressure valve for preventing blowout accidents in the drilling process.
Background
In various tasks of petroleum exploration and oilfield development, well drilling plays a very important role, but in the drilling engineering, phenomena such as kick, blowout and the like are frequently encountered. When the formation pressure exceeds the hydrostatic column pressure of the mud, the formation pressure is likely to push the mud to be sprayed upwards along the water hole of the drill string, the hose is likely to be damaged due to high pressure, and serious blowout accidents are likely to occur, and a large amount of mud is required to be pressurized at the moment, so that the drill floor becomes messy, and oil in the well is sprayed out, so that environmental pollution is caused.
When the symptoms of kick and blowout are found, the quick and efficient well closing and well killing operation is an important guarantee for effectively reducing the blowout accidents. And the check valve mounted on the drill string is an effective tool for preventing blowout in the drill pipe. Previously conventional drill check valves included arrow check valves, ball check valves, drop-in check valves, butterfly check valves, etc., which had the following problems: 1. the flow area of the channel is small, so that the channel is easy to block, and the drilling operation is influenced; 2. the throttling phenomenon is easy to generate, the erosion of the check valve part is quickened, and the service time is shortened.
The traditional check valve cannot meet the requirement of drilling safety, and a new back pressure valve needs to be designed to ensure that overflow is not easy to produce during the process of starting the drill; grouting is not easy to block during special operation; the throttle is not easy to generate, the erosion of internal parts is reduced, the sealing is reliable, and the service life is long.
To solve these problems, chinese patent ZL 201120184474.8 provides a cylindrical back pressure valve. The cylindrical back pressure valve comprises a valve body, wherein a valve seat and a direction sleeve are assembled in an inner cavity of the valve body, a cylindrical valve core is positioned between the valve seat and the direction sleeve, and the cylindrical valve core takes the direction sleeve as a guide to realize the function of the cylindrical back pressure valve.
However, in the scheme provided by ZL 201120184474.8, the cylindrical valve core is in a free state in all moving strokes, and in the blowout process, the probability that the fluid pressure cannot timely move the cylindrical valve core upwards to realize the instant closing function exists to a certain extent, so that an accident may not be timely prevented.
Disclosure of Invention
The invention aims at: aiming at the problems, the structural design of the cylindrical back pressure valve is provided to realize the function of immediately closing the cylindrical back pressure valve.
The technical scheme adopted by the invention is as follows:
the cylindrical back pressure valve comprises a valve body, wherein the inner cavity of the valve body is provided with a valve seat and a direction sleeve, a cylindrical valve core is positioned between the valve seat and the direction sleeve, and one end of the cylindrical valve core positioned on the direction sleeve is assembled on the direction sleeve through an assembling structure so that the cylindrical valve core can move along the axial direction of the valve body in a bidirectional manner to realize the opening and closing of the cylindrical back pressure valve; the assembly structure comprises a guide post on a cylindrical valve core and an assembly hole arranged on a direction sleeve, wherein an assembly seat capable of moving along the axial direction of a valve body is sleeved in the assembly hole, the guide post is sleeved in the assembly seat and capable of moving along the axial direction of the valve body to assemble the cylindrical valve core on the direction sleeve, and an elastic piece is arranged between the assembly seat and the direction sleeve and provides an elastic force towards a valve seat for the assembly seat; the assembly seat is provided with an axial guide groove and an oblique limiting groove communicated with the middle section of the guide groove and facing the direction sleeve, the assembly hole is provided with a convex tooth, and the convex tooth is positioned in a space formed by the guide groove and the oblique limiting groove after the assembly seat and the assembly hole are assembled; when the convex teeth are positioned in the inclined limiting grooves, the assembly seat is locked by the elastic force of the elastic piece, and at the moment, a space is reserved between the assembly seat and the valve seat, so that the cylindrical valve core has a bidirectional free moving space to realize the opening and closing of the cylindrical back pressure valve; when the convex teeth are positioned in the guide grooves, the assembly seat presses the cylindrical valve core on the valve seat through the elastic force of the elastic piece, so that the cylindrical back pressure valve is closed.
Further, the elastic piece is a compression spring sleeved between the assembly seat and the direction sleeve.
Further, the valve seat is provided with a sealing member mounting groove along the circumference of the inner ring, and a sealing member is arranged in the sealing member mounting groove and is matched with the sealing surface of the cylindrical valve core to form sealing.
Further, the direction sleeve is at least provided with a through hole facing the inner cavity wall of the valve body.
Further, at least a through hole facing the cylindrical valve core is formed in the direction sleeve.
Further, the diameter of the cylindrical valve core is not smaller than the diameter covered by the direction sleeve toward the cylindrical valve core through hole.
Further, one end of the cylindrical valve core, which is positioned on the valve seat, is provided with a cylindrical part which is matched with the inner diameter of the valve seat, the cylindrical valve core is sleeved in the valve seat through the cylindrical part, and a through hole is formed in the wall of the cylindrical part.
Further, the sealing section of the cylindrical valve core is of a conical structure.
Further, the surface of the cylindrical valve core for contacting with the assembly seat is an annular groove structure matched with the assembly seat
Further, the valve body, the valve seat cylindrical valve core, the assembly seat and the directional sleeve are coaxial.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. the adopted assembly structure is that the convex teeth are positioned in the guide grooves in the using process of the cylindrical back pressure valve, the assembly seat can press the cylindrical valve core on the valve seat through the elastic force of the elastic piece to enable the cylindrical back pressure valve to be in a normally closed state, and the problem that the probability that the fluid pressure cannot timely move the cylindrical valve core upwards to realize the instant closing function in the blowout process is solved to a certain extent because the cylindrical valve core of ZL 201120184474.8 is in a free state in all moving strokes of the cylindrical back pressure valve is solved;
2. in the assembly structure adopted, the convex teeth are positioned in the inclined limiting grooves in the process of tripping the cylindrical back pressure valve, the position of the assembly seat is locked by utilizing the elastic force of the elastic piece, the assembly seat and the valve seat are spaced to enable the cylindrical valve core to have a bidirectional free movement space so as to realize the free opening and closing of the cylindrical back pressure valve, and the cylindrical valve core in actual tripping realizes the opening of the cylindrical back pressure valve by utilizing gravity;
3. the assembly structure is arranged on the direction sleeve and the cylindrical valve core, so that the structural design or strength of the valve body cannot be influenced, and meanwhile, the assembly structure is simple and ingenious and has the advantage of high reliability.
Drawings
The invention will now be described by way of example and with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a normally open state of a barrel back pressure valve of the present invention;
FIG. 2 is a schematic diagram of the normally open closed fluid receiving force of the barrel back pressure valve of the present invention;
FIG. 3 is a schematic view of the normally closed condition of the barrel back pressure valve of the present invention;
FIG. 4 is a schematic view of the directional sleeve structure in the cylindrical back pressure valve of the present invention;
FIG. 5 is a schematic view of the mounting seat structure of the barrel back pressure valve of the present invention;
fig. 6 is a schematic diagram of the assembly relationship of the directional sleeve and the assembly seat in the cylindrical back pressure valve of the present invention.
The marks in the figure: 1-valve body, 2-press cap, 3-valve seat, 4-sealing element, 5-sealing element, 6-cylindrical valve core, 61-sealing section, 62-through hole, 63-guide post, 64-cylindrical portion, 7-fitting seat, 71-guide groove, 72-oblique limit groove, 8-elastic element, 9-direction sleeve, 91-through hole, 92-through hole, 93-fitting hole, 94-convex tooth.
Detailed Description
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
Examples
The cylindrical back pressure valve has the following structure:
having a valve body 1. The valve body 1 has an inner cavity in the axial direction (the direction of the center line in fig. 1, 2, 3) for the assembly of the internal components and the formation of a flow channel. The valve body 1 has a male connector and a female connector at both ends for connection.
Having a valve seat 3 for closing and sealing the cylinder back pressure valve. The valve seat 3 is of an annular structure, the sealing surface of the valve seat 3 is a conical surface with large outside and small inside, a sealing element mounting groove along the circumference is formed in the sealing surface, and a sealing element 5 is arranged in the sealing element mounting groove.
Having a cylindrical spool 6. The middle section of the cylindrical valve core 6 is a sealing section 61, and the sealing section 61 is of a conical structure and forms a sealing surface matched with the sealing surface of the valve seat 3. In the axial direction of the cylindrical valve element 6, one end has a cylindrical portion 64 which is adapted to the inner diameter of the valve seat 3, the wall of the cylindrical portion 64 is provided with a passage hole 62 for the passage of fluid, and the other end has a cylindrical guide post 63, the diameter of the guide post 63 being smaller than the diameter of the sealing section 61. In the cylindrical valve element 6, the seal segment 61, the guide post 63, and the cylindrical portion 64 are coaxial.
Having a mounting seat 7. The mounting seat 7 has a cylindrical structure, and has an inner diameter adapted to the guide post 63 and an outer diameter adapted to the inner diameter of the mounting hole 93 of the direction sleeve 9. An end portion of the fitting seat 7 has a slightly larger outer diameter for mounting limitation of the elastic member 8. The assembly seat 7 is provided with a guide groove 71 along the axial direction, the end part of the guide groove 71 with a slightly larger outer diameter at the assembly seat 7 is a terminal and penetrates to the other end of the assembly seat 7, and an inclined limit groove 72 which is communicated with the middle section position of the guide groove 71 and faces the direction sleeve 9 (after being installed) (or faces the penetrating end of the guide groove 71). The structure of which is shown in fig. 5.
With a directional sleeve 9. The direction sleeve 9 has a cylindrical structure with an end, a circular assembly hole 93 with an inner diameter adapted to the outer diameter of the assembly seat is arranged on the axis of the end, a convex tooth 94 is arranged on the inner diameter of the assembly hole 93, and the convex tooth 94 is adapted to the widths of the guide groove 71 and the oblique limiting groove 72. The direction sleeve 9 is provided with a passage hole for fluid to pass through. The passage holes comprise at least a passage hole 91 towards the inner cavity wall of the valve body 1 near the end side wall of the directional sleeve 9. Or at least comprises a through hole 92 open on the end of the directional sleeve 9 towards the cylindrical valve core 6. The structure of which is shown in fig. 4.
The assembly relationship of the components is shown in fig. 1. The inner cavity of the valve body 1 is sequentially provided with a directional sleeve 9, a cylindrical valve core 6 and a valve seat 3. The end of the direction sleeve 9 is connected with the internal thread of the inner cavity of the valve body 1 through the external thread. The valve seat 3 fixedly assembles each component into the valve body 1 through the pressing cap 2 on the outer side of the valve seat. The valve seat 3 and the inner cavity of the valve body 1 are assembled in a sealing way through a sealing piece 4.
The cylindrical valve core 6 is located between the valve seat 3 and the direction sleeve 9, one end of the cylindrical valve core 6 located on the direction sleeve is assembled on the direction sleeve 9 through an assembling structure, and the cylindrical part 64 at the other end is sleeved in a space formed by the valve seat 3 and the pressure cap 2, so that the cylindrical valve core 6 can move bidirectionally along the axial direction of the valve body to realize the opening and closing of the cylindrical back pressure valve.
The assembly structure comprises a guide post 63 on the cylindrical valve core 6 and an assembly hole 93 on the direction sleeve 9. The assembly seat 7 is sleeved in the assembly hole 93, and the convex teeth 94 of the assembly hole 93 are positioned in the space formed by the guide groove 71 and the inclined limiting groove 72 after assembly, so that a structure that the assembly seat 7 can axially and bidirectionally move in the direction sleeve 9 is formed, as shown in fig. 6. The guide post 63 of the cylindrical valve core 6 is sleeved in the assembly seat 7, and can move in both directions in the assembly seat 7 (along the axial direction of the valve body). An elastic piece 8 is arranged between the assembly seat 7 and the direction sleeve 9, provides elastic force for the assembly seat 7 towards the valve seat 3, and is used for limiting the installation of the elastic piece 8 through the end part with slightly larger outer diameter of the assembly seat 7.
After assembly, the valve body 1, the valve seat 3, the cylindrical valve core 6, the assembly seat 7 and the direction sleeve 9 are coaxial.
After assembly, when the convex teeth 94 are positioned in the inclined limiting grooves 72, the position of the assembly seat 7 is locked by the elastic force of the elastic piece 8, and at the moment, a space is reserved between the assembly seat 7 and the valve seat 3, so that the cylindrical valve core 6 has a bidirectional free moving space to realize the opening and closing of the cylindrical back pressure valve. The structure is as shown in fig. 1 as open schematic and fig. 2 as closed schematic.
In use, when the teeth 94 are located in the guide groove 71, the assembly seat 7 presses the cylindrical valve core 6 onto the valve seat 3 by the elastic force of the elastic member 8, so that the cylindrical back pressure valve is closed, as shown in fig. 3.
Based on the above structure, in another embodiment, in a specific selection of the elastic member 8, it is preferable that the compression spring is sleeved between the fitting seat 7 and the direction sleeve 9.
Based on the above-described structure, in another embodiment, the diameter of the sealing section 61 of the cylindrical spool 6 is not smaller than the diameter covered by the direction sleeve 9 toward the cylindrical spool passage hole 92, so that the maximum direct fluid receiving area is provided for the cylindrical spool 6.
Based on the above structure, in another specific embodiment, the surface of the cylindrical valve core 6 for contacting with the fitting seat is an annular groove structure adapted to the fitting seat 7 for the fitting installation of the fitting seat 7, ensuring reliability.
The cylindrical back pressure valve provided by the invention is used in the following steps:
in the initial state, as shown in fig. 1, the convex teeth 94 are positioned in the inclined limiting grooves 72, the position of the assembly seat 7 is locked by the elastic force of the elastic piece 8, and the cylindrical valve core 6 is in a normally open state under the gravity. In the normal drilling process, the cylindrical valve core 6 is in a normally open state due to gravity, and liquid at the lower part of the valve core enters the upper part of the valve core through a flow channel in the valve body when the cylindrical back pressure valve moves downwards, so that the self-grouting function is realized.
When blowout or kick occurs at the bottom of a well in the normal tripping process, the liquid pressure at the lower part of the valve core pushes the valve core to move upwards to close the valve body, so that the blowout or kick prevention function is realized, and the blowout or kick prevention function is shown in fig. 2. When blowout or surging is released, the drilling tool is lifted up, the valve core is restored to a normally open state, so that a grouting channel is opened, and self-grouting during drilling is realized, as shown in fig. 1.
When the cylindrical back pressure valve is lowered to the required well depth, grouting and pressurizing are carried out from the top of the drilling tool through the water hole of the drilling tool, the valve core bears the pressure from the upper part and moves downwards, then the assembly seat moves downwards and compresses the elastic piece, the convex teeth 94 are withdrawn from the inclined limiting grooves 72 and enter the guide grooves 71, limiting is released, the elastic force of the elastic piece is released, the assembly seat presses the valve core on the valve seat under the elastic force to enable the cylindrical back pressure valve to be closed, and at the moment, the back pressure valve is in a normally closed state, normal drilling and operation are carried out, and the internal blowout prevention function can be realized, as shown in fig. 3.
In the cylindrical back pressure valve, the adopted assembly structure is that the convex teeth are positioned in the guide grooves in the use process of the cylindrical back pressure valve, the assembly seat can press the cylindrical valve core on the valve seat through the elastic force of the elastic piece to enable the cylindrical back pressure valve to be in a normally closed state, and the problem that the probability that the fluid pressure cannot timely move the cylindrical valve core upwards to realize an instant closing function in the blowout process is solved to a certain extent because the cylindrical valve core of ZL 201120184474.8 is in a free state in all moving strokes of the cylindrical back pressure valve is solved; in addition, in the process of drilling, the convex teeth are positioned in the inclined limiting grooves, the positions of the assembly seats are locked by utilizing the elastic force of the elastic piece, the assembly seats and the valve seat are spaced to enable the cylindrical valve core to have a bidirectional free moving space to realize free opening and closing of the cylindrical back pressure valve, and the cylindrical valve core in actual drilling realizes opening of the cylindrical back pressure valve by utilizing gravity; meanwhile, the adopted assembly structure is arranged on the directional sleeve and the cylindrical valve core, so that the structural design or strength of the valve body cannot be influenced, and meanwhile, the assembly structure is simple and ingenious and has the advantage of high reliability.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (10)
1. The barrel-shaped back pressure valve is characterized in that: the valve comprises a valve body (1), wherein a valve seat (3) and a direction sleeve (9) are assembled in an inner cavity of the valve body (1), a cylindrical valve core (6) is positioned between the valve seat (3) and the direction sleeve (9), and one end of the cylindrical valve core (6) positioned on the direction sleeve is assembled on the direction sleeve (9) through an assembling structure so that the cylindrical valve core (6) can move bidirectionally along the axial direction of the valve body to realize the opening and closing of a cylindrical back pressure valve;
the assembly structure comprises a guide column (63) on a cylindrical valve core (6) and an assembly hole (93) formed in a direction sleeve (9), wherein an assembly seat (7) capable of moving bidirectionally along the axial direction of a valve body is sleeved in the assembly hole (93), the guide column (63) is sleeved in the assembly seat (7) and can move bidirectionally along the axial direction of the valve body to assemble the cylindrical valve core (6) on the direction sleeve (9), and an elastic piece (8) is arranged between the assembly seat (7) and the direction sleeve (9) to provide elastic force for the assembly seat (7) towards a valve seat (3);
the assembly seat (7) is provided with an axial guide groove (71) and an inclined limit groove (72) communicated with the middle section of the guide groove (71) and facing the direction sleeve (9), the assembly hole (93) is provided with a convex tooth (94), and the convex tooth (94) is positioned in a space formed by the guide groove (71) and the inclined limit groove (72) after the assembly seat (7) is assembled with the assembly hole (93);
when the convex teeth (94) are positioned in the inclined limiting grooves (72), the position of the assembly seat (7) is locked by the elastic force of the elastic piece (8), and at the moment, a space is reserved between the assembly seat (7) and the valve seat (3) so that the cylindrical valve core (6) has a bidirectional free moving space to realize the opening and closing of the cylindrical back pressure valve;
when the convex teeth (94) are positioned in the guide grooves (71), the assembly seat (7) presses the cylindrical valve core (6) on the valve seat (3) through the elastic force of the elastic piece (8) so as to close the cylindrical back pressure valve.
2. The cartridge back pressure valve of claim 1 wherein: the elastic piece (8) is a compression spring sleeved between the assembly seat (7) and the direction sleeve (9).
3. The cartridge back pressure valve of claim 1 wherein: the valve seat (3) is provided with a sealing element mounting groove along the circumference of the inner ring, a sealing element (5) is arranged in the sealing element mounting groove, and the sealing element (5) is matched with the sealing surface of the cylindrical valve core (6) to form sealing.
4. The cartridge back pressure valve of claim 1 wherein: at least a through hole (91) facing the inner cavity wall of the valve body (1) is arranged on the direction sleeve (9).
5. The cartridge back pressure valve of claim 1 wherein: at least a through hole (92) facing the cylindrical valve core (6) is arranged on the direction sleeve (9).
6. The cartridge back pressure valve of claim 5 wherein: the diameter of the cylindrical valve core (6) is not smaller than the diameter covered by the through hole (92) of the cylindrical valve core facing the direction sleeve (9).
7. The cartridge back pressure valve of claim 1 wherein: one end of the cylindrical valve core (6) positioned on the valve seat is provided with a cylindrical part (64) which is matched with the inner diameter of the valve seat (3), the cylindrical valve core (6) is sleeved in the valve seat (3) through the cylindrical part (64), and a through hole (62) is formed in the wall of the cylindrical part (64).
8. The cartridge back pressure valve of claim 1 wherein: the sealing section (61) of the cylindrical valve core (6) has a conical structure.
9. The cartridge back pressure valve of claim 1 wherein: the surface of the cylindrical valve core (6) which is used for being contacted with the assembly seat is an annular groove structure which is matched with the assembly seat (7).
10. The cartridge back pressure valve of claim 1 wherein: the valve body (1), the valve seat (3), the cylindrical valve core (6), the assembly seat (7) and the direction sleeve (9) are coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156415.6A CN110195574B (en) | 2018-02-24 | 2018-02-24 | Cylindrical back pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156415.6A CN110195574B (en) | 2018-02-24 | 2018-02-24 | Cylindrical back pressure valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110195574A CN110195574A (en) | 2019-09-03 |
| CN110195574B true CN110195574B (en) | 2024-02-13 |
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ID=67743965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810156415.6A Active CN110195574B (en) | 2018-02-24 | 2018-02-24 | Cylindrical back pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110195574B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109307B (en) * | 2021-12-01 | 2022-07-22 | 西南石油大学 | An erosion-resistant normally open internal blowout preventer |
| CN115434663A (en) * | 2022-07-19 | 2022-12-06 | 中国石油天然气集团有限公司 | A side-hole air-tight back pressure valve and downhole tool pipe string |
| CN115680547B (en) * | 2022-11-11 | 2024-08-27 | 中国石油天然气集团有限公司 | Combined type setting back pressure valve device, tool pipe string and application thereof |
| CN116411873A (en) * | 2023-04-27 | 2023-07-11 | 四川中能数智科技发展有限公司 | Multiple normally open normally closed blowout prevention valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4624316A (en) * | 1984-09-28 | 1986-11-25 | Halliburton Company | Super seal valve with mechanically retained seal |
| JP2003028330A (en) * | 2001-07-13 | 2003-01-29 | Tlv Co Ltd | Spring-loaded disk type antifreezing valve |
| CN202090892U (en) * | 2011-06-02 | 2011-12-28 | 广汉川油井控装备有限公司 | Cylindrical pressure return valve |
| CN202266251U (en) * | 2011-06-22 | 2012-06-06 | 中国石油化工股份有限公司 | Spring type sliding sleeve opening tool |
| CN202914032U (en) * | 2012-11-05 | 2013-05-01 | 中国石油集团川庆钻探工程有限公司 | Switching tool suitable for mechanical underground casing valve |
| CN207960573U (en) * | 2018-02-24 | 2018-10-12 | 广汉川油井控装备有限公司 | Cylindrical pressure return valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6880639B2 (en) * | 2002-08-27 | 2005-04-19 | Rw Capillary Tubing Accessories, L.L.C. | Downhole injection system |
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2018
- 2018-02-24 CN CN201810156415.6A patent/CN110195574B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4624316A (en) * | 1984-09-28 | 1986-11-25 | Halliburton Company | Super seal valve with mechanically retained seal |
| JP2003028330A (en) * | 2001-07-13 | 2003-01-29 | Tlv Co Ltd | Spring-loaded disk type antifreezing valve |
| CN202090892U (en) * | 2011-06-02 | 2011-12-28 | 广汉川油井控装备有限公司 | Cylindrical pressure return valve |
| CN202266251U (en) * | 2011-06-22 | 2012-06-06 | 中国石油化工股份有限公司 | Spring type sliding sleeve opening tool |
| CN202914032U (en) * | 2012-11-05 | 2013-05-01 | 中国石油集团川庆钻探工程有限公司 | Switching tool suitable for mechanical underground casing valve |
| CN207960573U (en) * | 2018-02-24 | 2018-10-12 | 广汉川油井控装备有限公司 | Cylindrical pressure return valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110195574A (en) | 2019-09-03 |
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