CN103670332A - Wellbore isolation valve - Google Patents
Wellbore isolation valve Download PDFInfo
- Publication number
- CN103670332A CN103670332A CN201310752726.6A CN201310752726A CN103670332A CN 103670332 A CN103670332 A CN 103670332A CN 201310752726 A CN201310752726 A CN 201310752726A CN 103670332 A CN103670332 A CN 103670332A
- Authority
- CN
- China
- Prior art keywords
- joint
- ball seat
- tube connector
- diameter section
- pod apertures
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002955 isolation Methods 0.000 title abstract description 11
- 230000004888 barrier function Effects 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 14
- 238000010276 construction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a wellbore isolation valve. The wellbore isolation valve comprises a first joint, a second joint, a connecting tube and a ball seat, wherein the connecting tube has a first end and a second end, the two ends of the connecting tube are in sealed connection with the first joint and the second joint respectively, the second end extends into the second joint, an annular empty part is formed between the second end of the connecting tube and the second joint, a radial first flow guiding hole is formed in the connecting tube and is communicated with the annular empty part, the ball seat is arranged in the connecting tube, the ball seat and the connecting tube are in slidable sealed connection, the end part of a seat sealed end of the ball seat is in sealed connection with a choke plug, a second flow guiding hole is formed in the ball seat, a first snap groove is circumferentially formed in the internal wall of the connecting tube, a second snap groove is circumferentially formed in the external wall of the ball seat, an elastic opening snap ring is embedded in the first snap groove or second snap groove, the ball seat is fixed with the connecting tube through a shear pin, and the ball seat and the connecting tube realize stroke control through big-small diameter fit. The wellbore isolation valve is high in safety.
Description
Technical field
The present invention relates to a kind of pit shaft barrier valve, belong to the downhole tool technical field of oil, Wellbore of Gas Wells operation.
Background technology
Pit shaft isolation tools is widely used in the construction operations such as oil well, gas well on oil field.The Main Function of pit shaft isolation tools: operating tool string and mineshaft annulus is isolated, and isolated rear operating tool string could form enclosure space, and other rely on the instrument of hydraulic startings to work like this.At present, according to different construction demands, developed multiple pit shaft isolation tools, but after the input setting ball that the pit shaft isolation tools on market has, closed circulation passage, can only barrier tube inner fluid flow into pit shaft, can not barrier tube outer fluid inflow pipe in, the pit shaft that can not play real meaning is isolated; Present being honored as a queen of some pit shaft isolation tools can completely cut off tubing string and mineshaft annulus completely; but in Construction practices, find at the scene the phenomenons such as pit shaft isolation tools on market often there will be ball seat in lower instrument process to be ejected body, throwing after setting ball cannot be setting, setting rear seal failure, cause construction accident to cause economic loss serious.
The problem and the defect that in use exist in view of above-mentioned existing pit shaft isolation tools, the inventor relies on actively research and innovation in addition of working experience for many years and abundant professional knowledge, finally researched and developed a kind of pit shaft barrier valve, the problem and the defect that to solve prior art, exist.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of pit shaft barrier valve, solved because the dirts such as sand grains cause ball seat stroke and can not realize isolated problem not, there is safe and reliable feature.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
Pit shaft barrier valve, comprise: the first joint, the second joint, tube connector and ball seat, wherein tube connector has first end and the second end, described first end is connected with described the first joint sealing, described the second end is connected with described the second joint sealing, described the second end stretches in described the second joint, described tube connector forms annular space portion between the end of junction to the second end of itself and the second joint and described the second joint, on described tube connector, offer the first pod apertures radially, described the first pod apertures is communicated with annular space portion, described ball seat is located in tube connector, described ball seat is connected with described tube connector slidable sealing, described ball seat is setting end near the first joint one side, the other end is sealed end, the end part seal of described ball seat sealed end is connected with plug, on described ball seat, there is the second pod apertures, on the inwall of described tube connector, circumferentially have the first draw-in groove, on the outer wall of described ball seat, circumferentially have the second draw-in groove, described the first draw-in groove or the second draw-in groove are embedded with elastic opening snap ring, described ball seat is fixed by shear pin and described tube connector, described tube connector comprises different two sections of internal diameter, and first end one side is the large diameter section that internal diameter is larger, and the second end one side is the little internal diameter section that internal diameter is less, and large diameter Duan Yu little internal diameter section junction forms the first shoulder, described ball seat comprises different two sections of external diameter, wherein setting end one side is the big outer diameter section that external diameter is larger, sealed end one side is the small outer diameter section that external diameter is less, between big outer diameter section and small outer diameter section, form the second shoulder, the external diameter of described big outer diameter section is greater than the internal diameter of little internal diameter section, described big outer diameter section and large diameter section are sealed and matched, and small outer diameter section and little internal diameter section are sealed and matched,
When described shear pin is by ball seat and described tube connector fixedly time, described the second pod apertures is relative with described the first pod apertures, conducting between described the first joint and the second joint;
After the setting shear pin of pitching is cut off, described ball seat moves to the second joint direction, until the second draw-in groove is relative with described the first draw-in groove, described elastic opening snap ring is stuck in the first draw-in groove and the second draw-in groove simultaneously, now, described the second pod apertures and described the first pod apertures stagger, isolated between described the first joint and the second joint, described the second shoulder and described the first shoulder offset simultaneously, the stroke cut-off of described ball seat.
As preferably, in described the first inner nosepiece wall, there is positive stop lug boss, when described shear pin is by ball seat and described tube connector fixedly time, end and the positive stop lug boss of the setting end of described ball seat offset, and described positive stop lug boss restriction ball seat moves to the first joint direction.
As preferably, described the first shoulder and described the second shoulder are the inclined-plane cooperatively interacting.
As preferably, described tube connector is connected with the second joint with described the first joint respectively by external screw thread, described the first joint and the second joint are respectively by marking closely screw and tube connector is fixed, between described the first joint and tube connector, and by sealing ring, seal respectively between the second joint and tube connector.
As preferably, described the first joint is female joint, and described the second joint is male joint.
As preferably, described the second pod apertures and described the first pod apertures are four, and described the second pod apertures was upwards uniformly distributed in described ball seat week, and described the first pod apertures was upwards uniformly distributed in described tube connector week.
As preferably, between described ball seat and described tube connector, by O type circle, seal.
Compared with prior art, beneficial effect of the present invention is:
The body of pit shaft barrier valve of the present invention adopts the first joint, tube connector and the second joint three stage structure, is convenient to manufacture, and is easy to assembling.The setting of the first shoulder and the second shoulder avoids the power that ball seat applies all by elastic opening snap ring, to be born, and has improved the safety of integral device.And this kind of structure can avoid the foreign material such as sandstone to enter inner pelletizing seat stroke deficiency, and elastic opening snap ring can not, by ball seat and tube connector relative positioning, cannot be realized isolated defect.The first shoulder and the second shoulder are the inclined-plane cooperatively interacting.Can increase contact area, and the impact force of ball seat can be decomposed, avoid parts damages.
Accompanying drawing explanation
Fig. 1 is that the structure of an embodiment of pit shaft barrier valve of the present invention is partly cutd open figure.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
Fig. 1 is that the structure of an embodiment of pit shaft barrier valve of the present invention is partly cutd open figure.As shown in Figure 1, pit shaft barrier valve, comprise: the first joint 1, the second joint 7, tube connector 4 and ball seat 2, wherein tube connector 4 has first end and the second end, the first end of tube connector 4 and the first joint 1 are tightly connected, the second end of tube connector 4 and the second joint 7 are tightly connected, the second end of tube connector 4 stretches in the second joint 7, tube connector 4 forms annular space portion 13 between the end of junction to the second end of itself and the second joint and the second joint 7, on tube connector 4, offer the first pod apertures 41 radially, the first pod apertures 41 is communicated with annular space portion 13, ball seat 2 is located in tube connector 4, ball seat 2 is connected with tube connector 4 slidable sealings, ball seat 2 is setting end near the first joint 1 one sides, the other end is sealed end, the end part seal of the sealed end of ball seat 2 is connected with plug 6, on ball seat 2, there is the second pod apertures 21, on the inwall of tube connector 4, circumferentially have the first draw-in groove 42, on the outer wall of ball seat 2, circumferentially have the second draw-in groove 22, the first draw-in groove 42 or the second draw-in groove 22 are embedded with elastic opening snap ring 3, ball seat 2 is fixing with tube connector 4 by shear pin 5, tube connector 4 comprises different two sections of internal diameter, and first end one side is the large diameter section that internal diameter is larger, and the second end one side is the little internal diameter section that internal diameter is less, and large diameter Duan Yu little internal diameter section junction forms the first shoulder 43, ball seat 2 comprises different two sections of external diameter, wherein setting end one side is the big outer diameter section that external diameter is larger, sealed end one side is the small outer diameter section that external diameter is less, forms the second shoulder 23 between big outer diameter section and small outer diameter section, and the external diameter of big outer diameter section is greater than the internal diameter of little internal diameter section, big outer diameter section and large diameter section are sealed and matched, and small outer diameter section and little internal diameter section are sealed and matched,
When shear pin 5 by ball seat 2 with tube connector 4 fixedly time, the second pod apertures 21 is relative with the first pod apertures 41, conducting between the first joint 1 and the second joint 7;
After the setting shear pin 5 of pitching is cut off, ball seat 2 moves to the second joint 7 directions, until the second draw-in groove 22 is relative with the first draw-in groove 42, elastic opening snap ring 3 is stuck in the first draw-in groove 42 and the second draw-in groove 22 simultaneously, and now, the second pod apertures 21 and the first pod apertures 41 stagger, isolated between the first joint 1 and the second joint 7, meanwhile, the second shoulder 23 and the first shoulder 43 offset, the stroke cut-off of ball seat 2.
The body of pit shaft barrier valve of the present invention adopts the first joint, tube connector and the second joint three stage structure, is convenient to manufacture, and is easy to assembling.The setting of the first shoulder 43 and the second shoulder 23 avoids the power that ball seat 2 applies all by elastic opening snap ring 3, to be born, and has improved the safety of integral device.And this kind of structure can avoid the foreign material such as sandstone to enter inner pelletizing seat 2 strokes deficiencies, and elastic opening snap ring 3 can not, by ball seat 2 and tube connector 4 relative positionings, cannot be realized isolated defect.The first shoulder 43 and the second inclined-plane of shoulder 23 for cooperatively interacting.Can increase contact area, and the impact force of ball seat 2 can be decomposed, avoid parts damages.
As above-described embodiment preferably, on the first joint 1 inwall, there is positive stop lug boss 18, when shear pin 5 by ball seat 2 with tube connector 4 fixedly time, the end of the setting end of ball seat 2 and positive stop lug boss 18 offset, positive stop lug boss 18 limits ball seats 2 and moves to the first joint 1 direction.The first joint 1 is provided with positive stop lug boss, can effectively stop ball seat, avoids being lowered at instrument that in process, the up body of going out causes tool damage because upthrust is cut off shear pin 5 compared with ambassador's ball seat.
In an embodiment of the present invention, tube connector 4 is connected with the second joint 7 with the first joint 1 respectively by external screw thread, the first joint 1 and the second joint 7 are fixing with tube connector 4 by marking closely screw 10 respectively, between the first joint 1 and tube connector 4, and by sealing ring 8,11, seal respectively between the second joint 7 and tube connector 4.
The first joint 1 is female joint, for being connected with the tubing string of top; The second joint 7 is male joint, for being connected with the tubing string of below.
The second pod apertures 21 and the first pod apertures 41 are four, and the second pod apertures 21 is upwards uniformly distributed at ball seat for 2 weeks, and the first pod apertures 41 is upwards uniformly distributed at tube connector for 4 weeks.
Between ball seat 2 and tube connector 4, by O type circle 9,12, seal.In embodiment illustrated in fig. 1, on the outer wall of the big outer diameter section of ball seat 2, circumferentially have seal groove, in sealing groove, be provided with O type circle 9 and realize the sealing between setting end and tube connector 4.On the inwall of the little internal diameter section of tube connector 4, circumferentially have seal groove, in sealing groove, be provided with the sealing that O type circle 12 is realized between tube connector 4 and small outer diameter section.O type circle 12 is realized two resealings, and when elastic opening snap ring 3 is stuck in the first draw-in groove 42 and the second draw-in groove 22 when interior simultaneously, the second pod apertures 21 is between two resealings.In the present embodiment, every resealing is realized by twice O type circle 12.In the present embodiment, elastic opening snap ring 3 is embedded in the second draw-in groove 22, is convenient to assembling, and effectively keeps the elasticity of elastic opening snap ring 3.
Above embodiment is only exemplary embodiment of the present invention, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection domain, this modification or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (6)
1. pit shaft barrier valve, it is characterized in that, comprise: the first joint, the second joint, tube connector and ball seat, wherein tube connector has first end and the second end, described first end is connected with described the first joint sealing, described the second end is connected with described the second joint sealing, described the second end stretches in described the second joint, described tube connector forms annular space portion between the end of junction to the second end of itself and the second joint and described the second joint, on described tube connector, offer the first pod apertures radially, described the first pod apertures is communicated with annular space portion, described ball seat is located in tube connector, described ball seat is connected with described tube connector slidable sealing, described ball seat is setting end near the first joint one side, the other end is sealed end, the end part seal of the sealed end of described ball seat is connected with plug, on described ball seat, there is the second pod apertures, on the inwall of described tube connector, circumferentially have the first draw-in groove, on the outer wall of described ball seat, circumferentially have the second draw-in groove, described the first draw-in groove or the second draw-in groove are embedded with elastic opening snap ring, described ball seat is fixed by shear pin and described tube connector, described tube connector comprises different two sections of internal diameter, and first end one side is the large diameter section that internal diameter is larger, and the second end one side is the little internal diameter section that internal diameter is less, and large diameter Duan Yu little internal diameter section junction forms the first shoulder, described ball seat comprises different two sections of external diameter, wherein setting end one side is the big outer diameter section that external diameter is larger, sealed end one side is the small outer diameter section that external diameter is less, between big outer diameter section and small outer diameter section, form the second shoulder, the external diameter of described big outer diameter section is greater than the internal diameter of little internal diameter section, described big outer diameter section and large diameter section are sealed and matched, and small outer diameter section and little internal diameter section are sealed and matched,
When described shear pin is by ball seat and described tube connector fixedly time, described the second pod apertures is relative with described the first pod apertures, conducting between described the first joint and the second joint;
After the setting shear pin of pitching is cut off, described ball seat moves to the second joint direction, until the second draw-in groove is relative with described the first draw-in groove, described elastic opening snap ring is stuck in the first draw-in groove and the second draw-in groove simultaneously, now, described the second pod apertures and described the first pod apertures stagger, isolated between described the first joint and the second joint, described the second shoulder and described the first shoulder offset simultaneously, the stroke cut-off of described ball seat.
2. pit shaft barrier valve according to claim 1, is characterized in that, described the first shoulder and described the second shoulder are the inclined-plane cooperatively interacting.
3. pit shaft barrier valve according to claim 1, it is characterized in that, described tube connector is connected with the second joint with described the first joint respectively by external screw thread, described the first joint and the second joint are respectively by marking closely screw and tube connector is fixed, between described the first joint and tube connector, and by sealing ring, seal respectively between the second joint and tube connector.
4. pit shaft barrier valve according to claim 1, is characterized in that, described the first joint is female joint, and described the second joint is male joint.
5. pit shaft barrier valve according to claim 1, it is characterized in that, described the second pod apertures and described the first pod apertures are four, and described the second pod apertures was upwards uniformly distributed in described ball seat week, and described the first pod apertures was upwards uniformly distributed in described tube connector week.
6. pit shaft barrier valve according to claim 1, is characterized in that, between described ball seat and described tube connector, by O type circle, seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310752726.6A CN103670332B (en) | 2013-12-31 | 2013-12-31 | Shaft isolation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310752726.6A CN103670332B (en) | 2013-12-31 | 2013-12-31 | Shaft isolation valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103670332A true CN103670332A (en) | 2014-03-26 |
| CN103670332B CN103670332B (en) | 2016-02-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310752726.6A Active CN103670332B (en) | 2013-12-31 | 2013-12-31 | Shaft isolation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103670332B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982159A (en) * | 2014-06-04 | 2014-08-13 | 安东石油技术（集团）有限公司 | Reverse circulation valve with ball capable of being thrown |
| CN106522881A (en) * | 2016-12-07 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Downhole isolation valve |
| CN114364861A (en) * | 2019-11-05 | 2022-04-15 | 哈利伯顿能源服务公司 | Tee Release Equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5484022A (en) * | 1991-08-08 | 1996-01-16 | Exploration & Production Services (North Sea) Ltd. | Tubing test valve |
| CN202882846U (en) * | 2012-10-12 | 2013-04-17 | 中国石油集团长城钻探工程有限公司 | Downhole isolating valve |
| CN202954786U (en) * | 2012-12-11 | 2013-05-29 | 中国石油化工股份有限公司 | Oil pipe isolation valve |
| CN103299028A (en) * | 2010-10-18 | 2013-09-11 | Ncs油田服务股份有限公司加拿大分公司 | Tools and methods for use in completion of a wellbore |
| CN203655234U (en) * | 2013-12-31 | 2014-06-18 | 安东石油技术（集团）有限公司 | Shaft isolating valve |
-
2013
- 2013-12-31 CN CN201310752726.6A patent/CN103670332B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5484022A (en) * | 1991-08-08 | 1996-01-16 | Exploration & Production Services (North Sea) Ltd. | Tubing test valve |
| CN103299028A (en) * | 2010-10-18 | 2013-09-11 | Ncs油田服务股份有限公司加拿大分公司 | Tools and methods for use in completion of a wellbore |
| CN202882846U (en) * | 2012-10-12 | 2013-04-17 | 中国石油集团长城钻探工程有限公司 | Downhole isolating valve |
| CN202954786U (en) * | 2012-12-11 | 2013-05-29 | 中国石油化工股份有限公司 | Oil pipe isolation valve |
| CN203655234U (en) * | 2013-12-31 | 2014-06-18 | 安东石油技术（集团）有限公司 | Shaft isolating valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982159A (en) * | 2014-06-04 | 2014-08-13 | 安东石油技术（集团）有限公司 | Reverse circulation valve with ball capable of being thrown |
| CN106522881A (en) * | 2016-12-07 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Downhole isolation valve |
| CN114364861A (en) * | 2019-11-05 | 2022-04-15 | 哈利伯顿能源服务公司 | Tee Release Equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103670332B (en) | 2016-02-10 |
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Effective date of registration: 20181225 Address after: No. 309, Second Street, Middle and South China, West District, Tianjin Binhai Economic and Technological Development Zone, 300450 Patentee after: Tianjin An Dong petroleum machinery Manufacturing Co., Ltd Address before: 100102 No. 8 Pingcui West Road, Donghuqu, Chaoyang District, Beijing Patentee before: Anton Oilfield Services (Group) Ltd. |