CN106703750B - Deep water casing high pressure Spring-Loaded Pressure Relief Valve - Google Patents
Deep water casing high pressure Spring-Loaded Pressure Relief Valve Download PDFInfo
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- CN106703750B CN106703750B CN201510776020.2A CN201510776020A CN106703750B CN 106703750 B CN106703750 B CN 106703750B CN 201510776020 A CN201510776020 A CN 201510776020A CN 106703750 B CN106703750 B CN 106703750B
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- ball seat
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- relief valve
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Abstract
The present invention relates to a kind of deep water casing high pressure Spring-Loaded Pressure Relief Valves, including the interior valve body for having axial passage, ball seat and spring base；Valve inner is equipped with the body cavity being connected with axial passage, ball seat setting is connected with axial passage and body cavity respectively on axial passage and inside it, and spring base is connected with axial passage and body cavity in body cavity and inside it respectively with respect to ball seat setting；Spring base is equipped with ball sealer towards one end of ball seat and ball seat forms pressure seal, controls relief valve pressure at two ends；The safety vent being connected to inside the spring base is equipped in ball sealer.Structure of the invention is reasonable; conducive to size smallization; meets the needs of a variety of casing sizes and annular pressure; the automatic open close of valve is realized by spring base; pressure in adjusting sleeve pipe annular space; it is not required to reduce yield or the overpressure protection to wellbore integrity can be realized using the big completion mode of costly technical difficulty, vent pressure can be adjusted arbitrarily, installation, convenient disassembly.
Description
Technical field
The present invention relates to a kind of deep water tool of production more particularly to a kind of deep water casing high pressure Spring-Loaded Pressure Relief Valves.
Background technique
Due to the marine environment of deep water, seabed and shallow stratum temperature are low, and the temperature of reservoir fluid is high.It is surveyed in oil/gas well
In examination and production process, the fluid temperature (F.T.) in each layer casing annulus confined space can be made to dramatically increase, so as to cause confined space
The phenomenon that interior pressure play rises.Deep water uses underwater well head, different from the dry type well head on land and shallow water, can not produce and survey
The release of annular pressure is carried out during examination, and then serious harm can be brought to wellbore integrity.Currently, for deep water annular space
The control method of pressure, mainly by the way of limiting oil gas well production, and this has seriously affected productivity effect, and for deep water
Pressure monitoring accuracy is not high in casing annulus, is easy occur accident in production.
Compressible foam material and rupture disk, compressible foam material are mostly used in deep water pit shaft controlling party face both at home and abroad at present
Material is influenced vulnerable to casing programme and stratum high-temperature, and rupture disk destroys wellbore integrity.Relief valve is using less, the reason is that traditional
The structure size of relief valve is larger, and cracking pressure control is insufficient, and the vulnerable part of conventional relief valve is more, is easy to produce failure.
Summary of the invention
The technical problem to be solved in the present invention is that it is simple, reliable to provide a kind of structure, meet a variety of casing sizes and ring
The deep water casing high pressure Spring-Loaded Pressure Relief Valve of empty pressure demand.
The technical solution adopted by the present invention to solve the technical problems is: providing a kind of deep water casing high pressure spring pressure release
Valve, including the interior valve body for having axial passage, ball seat and spring base；The valve inner is equipped with internal diameter and is greater than the axial passage
Internal diameter and the body cavity being connected with the axial passage, the ball seat setting are distinguished on the axial passage and inside it
It is connected with the axial passage and body cavity, the relatively described ball seat of the spring base is arranged in the body cavity and it
Inside is connected with the axial passage and body cavity respectively；
The spring base is equipped with ball sealer towards one end of the ball seat and the ball seat forms pressure seal, controls pressure release
Valve pressure at two ends；The safety vent being connected to inside the spring base is equipped in the ball sealer.
Preferably, the spring base includes relatively openable and closable sealed ball seat and sealing cover and is connected to the sealing
Spring between ball seat and sealing cover；The sealed ball seat is arranged on the side of the ball seat in the ball sealer；
The sealing cover be equipped with axially through to the body cavity inner passage, the sealed ball seat be equipped with it is described
The ball seat channel that body cavity is connected with inner passage, and the ball seat channel is located at the ball sealer periphery.
Preferably, the inner passage includes the lesser first end of internal diameter and the biggish second end of internal diameter, the second end
Close to the sealed ball seat；
The sealed ball seat is equipped with boss corresponding with the second end towards the side of the sealing cover；Described
When sealing cover is closed on the sealed ball seat, the boss is placed in the second end.
Preferably, the periphery of the boss is equipped with the annular groove of indent, and the sealing cover is towards the end of the sealed ball seat
Face is retractable to be arrived in the annular groove.
Preferably, the diameter of the boss is consistent with the internal diameter of the second end.
Preferably, the second end of the inner passage is tapered, and is connected with the lesser one end of internal diameter with the first end.
Preferably, the both ends of the spring are respectively welded on the sealed ball seat and sealing cover.
Preferably, the ball seat is connected in the valve body by thread seal；
The spring base is connected in the valve body by thread seal.
Preferably, the periphery of the valve body is equipped with the external screw thread cooperated with casing.
Preferably, the valve body includes the biggish first segment of outer diameter and the lesser second segment of outer diameter, the spring base setting
In the first segment, the ball seat is arranged on the second segment；The external screw thread is located at the periphery of the first segment.
Structure of the invention is reasonable, is conducive to size smallization, meets the needs of a variety of casing sizes and annular pressure, pass through spring
The automatic open close of seat realization valve, pressure in adjusting sleeve pipe annular space are not required to reduce yield or using big complete of costly technical difficulty
The overpressure protection to wellbore integrity can be realized in well mode, and vent pressure can be adjusted arbitrarily, installation, convenient disassembly.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the schematic perspective view of the deep water casing high pressure Spring-Loaded Pressure Relief Valve of one embodiment of the invention；
Fig. 2 is the top view of the deep water casing high pressure Spring-Loaded Pressure Relief Valve of one embodiment of the invention and the section view along line B-B
Figure；
Fig. 3 is the side view of the deep water casing high pressure Spring-Loaded Pressure Relief Valve of one embodiment of the invention and the section view along G-G line
Figure.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
As shown in Figure 1, 2, the deep water casing high pressure Spring-Loaded Pressure Relief Valve of one embodiment of the invention, including interior have axial passage
11 valve body 10, ball seat 20 and spring base 30, be equipped with inside valve body 10 internal diameter be greater than 11 internal diameter of axial passage and with it is axial logical
The body cavity 12 that road 11 is connected, ball seat 20 setting on axial passage 11 and inside it respectively with axial passage 11 and valve body
Inner cavity 12 is connected, spring base 30 with respect to ball seat 20 be arranged in body cavity 12 and inside it respectively with axial passage 11 and valve
Intracoelomic cavity 12 is connected.Wherein, spring base 30 is equipped with ball sealer 31 towards one end of ball seat 20 and ball seat 20 forms pressure seal,
Control relief valve pressure at two ends；The relief valve is installed on casing, controls casing pressure at both sides, is guaranteed that casing does not occur to squeeze and is ruined.
The safety vent 32 for being equipped in ball sealer 31 and being connected to inside spring base 30, the depth and radius size of safety vent 32 are according to design
Wellbore pressure design, forms fracture mechanism, prevents relief valve pressure at two ends serious unbalance caused by blocking or pressure anomaly, meets
The actual needs of field engineering.
Again as shown in Figure 1, 2, the periphery of valve body 10 is equipped with the external screw thread 13 cooperated with casing.
Valve body 10 may include the biggish first segment 14 of outer diameter and the lesser second segment 15 of outer diameter, and body cavity 12 is located at first
In section 14, so that spring base 30 is arranged in first segment 14, ball seat 20 is arranged on second segment 15.External screw thread 13 is located at first segment
14 periphery, when relief valve is installed on casing, by the screw-internal thread fit of external screw thread 13 and casing.
Ball seat 20 can be connected in valve body 10 by thread seal.Specifically, as shown in (2) in Fig. 2, ball seat 20 is closely matched
It closes on the axial passage 11 of valve body 10.Ball seat 20 towards one end end face of spring base 30 be the cambered surface cooperated with ball sealer 31,
To which when spring base 30 closes on ball seat 20, ball sealer 31 can be by the closed at one end of ball seat 20.
Spring base 30 can also be connected in valve body 10 by thread seal.
Spring base 30 includes relatively openable and closable sealed ball seat 33 and sealing cover 35 and is connected to sealed ball seat 33 and close
Spring 34 between capping 35, the setting of ball sealer 31 is in sealed ball seat 33 on the side of ball seat 20 (far from sealing cover 35).
When 10 one end of valve body is pressurized, spring 34 compresses in spring base 30, and sealing cover 35 can be closed on sealed ball seat 33, and ball sealer
33 movable belt dynamic sealing balls 31 of seat are cooperated on ball seat 20.When pressure removes, spring 34 is replied, and drives 35 self-sealing of sealing cover
Movement is opened on ball seat 33.
Preferably, ball sealer 31 and sealed ball seat 33 are structure as a whole.
As shown in (2) in Fig. 2, sealing cover 35 is equipped with axially through to the inner passage of body cavity 12, sealed ball seat 33
Equipped with the ball seat channel 331 being connected with body cavity 12 and inner passage, and ball seat channel 331 is located at 31 periphery of ball sealer.
Further, inner passage may include the lesser first end 351 of internal diameter and the biggish second end 352 of internal diameter, second
End 352 is close to sealed ball seat 33.The second end 352 of inner passage is tapered, and with the lesser one end of internal diameter and 351 phase of first end
It connects.
Sealed ball seat 33 is equipped with boss 332 corresponding with second end 352 towards the side of sealing cover 35；In sealing cover
35 when closing on sealed ball seat 33, and boss 332 is placed in second end 352.The circumferential lateral surface of boss 332 can correspond to second end
352 tapered surface is inclined-plane, and the two matches.
The periphery of boss 332 is equipped with the annular groove 333 of indent, and the end face of sealing cover 35 towards sealed ball seat 33 is retractable to be arrived
In annular groove 333.
The diameter of boss 332 is consistent with the internal diameter of second end 352, can should when boss 332 is placed in second end 352
Second end 352 is closed；Meanwhile the end face of sealing cover 35 is cooperated in annular groove 333.
As shown in Figure 2,3, boss 332 is located at the medium position of sealed ball seat 33, and safety vent 32 is provided in boss 332
At the heart.Ball seat channel 331 can be equipped with multiple, and interval is evenly distributed on the periphery of safety vent 32.The safety vent 32 is not through sealing
Ball 31,32 depth of safety vent and radius size are designed according to the wellbore pressure of design, are formed fracture mechanism, are mainly used for preventing ball
Relief valve pressure at two ends serious unbalance caused by the blocking of seat channel 331 or pressure anomaly.
Spring 34 is fixedly connected between sealing cover 35 and sealed ball seat 33.Preferably, the both ends of spring 34 are respectively welded
On sealed ball seat 33 and sealing cover 35.Setting of the spring 34 on spring base 30, does not contact with axial passage 11, will not occur
Because of spring failure problem caused by exogenous impurity.
The present invention is suitable according to determining control pressure selection cracking pressure in use, determining annular space control pressure size
Spring base 30 and ball seat 20 are installed on composition deep water casing high pressure spring pressure release on valve body 10 by spring 34 and safety vent 32
Then valve is installed on casing.
Deep water casing high pressure Spring-Loaded Pressure Relief Valve of the invention can be realized deep water high temperature and pressure casing fluid pressure control
System, can be convenient for changing various springs according to different pressures and sealed ball seat 33 combines, and meet the actual needs of field engineering.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (9)
1. a kind of deep water casing high pressure Spring-Loaded Pressure Relief Valve, which is characterized in that including the interior valve body (10) for having axial passage (11),
Ball seat (20) and spring base (30)；Be equipped with inside the valve body (10) internal diameter be greater than the axial passage (11) internal diameter and with institute
The body cavity (12) that axial passage (11) is connected is stated, ball seat (20) setting is on the axial passage (11) and in it
Portion is connected with the axial passage (11) and body cavity (12) respectively, and the relatively described ball seat (20) of the spring base (30) sets
It sets in the body cavity (12) and is connected respectively with the axial passage (11) and body cavity (12) inside it；
The spring base (30) is equipped with ball sealer (31) and the ball seat (20) towards one end of the ball seat (20) and forms pressure
Sealing controls relief valve pressure at two ends；The safety vent for being equipped in the ball sealer (31) and being connected to inside the spring base (30)
(32)；
The spring base (30) includes relatively openable and closable sealed ball seat (33) and sealing cover (35) and is connected to the sealing
Spring (34) between ball seat (33) and sealing cover (35)；Ball sealer (31) setting is in the sealed ball seat (33) close to institute
On the side for stating ball seat (20)；
The sealing cover (35) is equipped with axially through the inner passage to the body cavity (12), and the sealed ball seat (33) sets
There is the ball seat channel (331) being connected with the body cavity (12) and inner passage, and the ball seat channel (331) is located at institute
State ball sealer (31) periphery.
2. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 1, which is characterized in that the inner passage includes
The lesser first end of internal diameter (351) and the biggish second end of internal diameter (352), the second end (352) is close to the sealed ball seat
(33)；
The sealed ball seat (33) is equipped with corresponding with the second end (352) convex towards the side of the sealing cover (35)
Platform (332)；When the sealing cover (35) closes on the sealed ball seat (33), boss (332) merging described second
It holds in (352).
3. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 2, which is characterized in that the boss (332)
Periphery is equipped with the annular groove (333) of indent, and the end face of sealing cover (35) towards the sealed ball seat (33) is retractable to arrive institute
It states in annular groove (333).
4. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 2, which is characterized in that the boss (332)
Diameter is consistent with the internal diameter of the second end (352).
5. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 2, which is characterized in that the of the inner passage
Two ends (352) are tapered, and are connected with the lesser one end of internal diameter with the first end (351).
6. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 1, which is characterized in that the two of the spring (34)
End is respectively welded on the sealed ball seat (33) and sealing cover (35).
7. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 1-6, which is characterized in that the ball seat
(20) it is connected in the valve body (10) by thread seal；
The spring base (30) is connected in the valve body (10) by thread seal.
8. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 1-6, which is characterized in that the valve body
(10) periphery is equipped with the external screw thread (13) cooperated with casing.
9. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 8, which is characterized in that the valve body (10) includes
The biggish first segment of outer diameter (14) and the lesser second segment of outer diameter (15), the spring base (30) are arranged in the first segment (14)
Interior, the ball seat (20) is arranged on the second segment (15)；The external screw thread (13) is located at the periphery of the first segment (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510776020.2A CN106703750B (en) | 2015-11-12 | 2015-11-12 | Deep water casing high pressure Spring-Loaded Pressure Relief Valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510776020.2A CN106703750B (en) | 2015-11-12 | 2015-11-12 | Deep water casing high pressure Spring-Loaded Pressure Relief Valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106703750A CN106703750A (en) | 2017-05-24 |
| CN106703750B true CN106703750B (en) | 2019-04-12 |
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ID=58930253
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510776020.2A Active CN106703750B (en) | 2015-11-12 | 2015-11-12 | Deep water casing high pressure Spring-Loaded Pressure Relief Valve |
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| Country | Link |
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| CN (1) | CN106703750B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701147B (en) * | 2017-10-26 | 2023-11-10 | 中国石油大学(北京) | Annulus pressure underground control valve |
| CN114059960A (en) * | 2020-08-04 | 2022-02-18 | 中国石油天然气股份有限公司 | Sleeve valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2797611Y (en) * | 2005-04-29 | 2006-07-19 | 吉林石油集团有限责任公司 | Straight-through type fracture wellhead casing protector |
| CN200968199Y (en) * | 2006-09-30 | 2007-10-31 | 陈春生 | Oil well casing-pressure regulating apparatus |
| CN201129497Y (en) * | 2007-12-15 | 2008-10-08 | 李庆芝 | Multifunctional pressure test ball valve |
| CN202064892U (en) * | 2011-04-22 | 2011-12-07 | 中国石油天然气股份有限公司 | One-way constant pressure valve |
| CN203822268U (en) * | 2014-04-04 | 2014-09-10 | 张晓强 | Adjustable constant pressure exhaust device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2181671A1 (en) * | 1996-07-19 | 1998-01-20 | Rick Picher | Downhole two-way check valve |
| CN201218081Y (en) * | 2008-06-11 | 2009-04-08 | 中国石油天然气股份有限公司 | Sleeve pipe constant pressure air release valve |
-
2015
- 2015-11-12 CN CN201510776020.2A patent/CN106703750B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2797611Y (en) * | 2005-04-29 | 2006-07-19 | 吉林石油集团有限责任公司 | Straight-through type fracture wellhead casing protector |
| CN200968199Y (en) * | 2006-09-30 | 2007-10-31 | 陈春生 | Oil well casing-pressure regulating apparatus |
| CN201129497Y (en) * | 2007-12-15 | 2008-10-08 | 李庆芝 | Multifunctional pressure test ball valve |
| CN202064892U (en) * | 2011-04-22 | 2011-12-07 | 中国石油天然气股份有限公司 | One-way constant pressure valve |
| CN203822268U (en) * | 2014-04-04 | 2014-09-10 | 张晓强 | Adjustable constant pressure exhaust device |
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| Publication number | Publication date |
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| CN106703750A (en) | 2017-05-24 |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 518067 Offshore Oil Building, No. 1 Shekou Industrial Road, Shenzhen, Guangdong Province Applicant after: CNOOC Deepwater Development Limited Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: China University of Petroleum (Beijing) Address before: 518067 Offshore Oil Building, No. 1 Shekou Industrial Road, Shenzhen, Guangdong Province Applicant before: CNOOC Deepwater Development Limited Applicant before: China National Offshore Oil Corporation Applicant before: China University of Petroleum (Beijing) |
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| GR01 | Patent grant |