CN108843272A - Discharge the renewable type pressure relief tool and completion interval of well body structure of annular space trapped pressure - Google Patents
Discharge the renewable type pressure relief tool and completion interval of well body structure of annular space trapped pressure Download PDFInfo
- Publication number
- CN108843272A CN108843272A CN201810627556.1A CN201810627556A CN108843272A CN 108843272 A CN108843272 A CN 108843272A CN 201810627556 A CN201810627556 A CN 201810627556A CN 108843272 A CN108843272 A CN 108843272A
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- pressure
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- pressure relief
- elastomer
- engine oil
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- 239000010705 motor oil Substances 0.000 claims abstract description 38
- 239000004568 cement Substances 0.000 claims abstract description 10
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 8
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 8
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 229920001971 elastomer Polymers 0.000 claims description 46
- 239000000806 elastomer Substances 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000010721 machine oil Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000010410 layer Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 230000001681 protective effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000009466 transformation Effects 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
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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- 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)
- Safety Valves (AREA)
Abstract
The present invention relates to a kind of renewable type pressure relief tools for discharging annular space trapped pressure comprising main body, and the pressure sensitive chamber, pressure sensitive film, engine oil chamber and the slide valve that are arranged in main body；Pressure sensitive chamber is located in the middle part of main body, and pressure sensitive chamber side is connected to through flow channels with annular space trap, the confined space that annular space trap is formed by casing, outer layer sleeve, casing cement sheath and underwater well head；Filter screen is provided between flow channels and pressure sensitive chamber；The pressure sensitive chamber other side is provided with engine oil chamber, and engine oil chamber is arranged in parallel with pressure sensitive chamber, and pressure sensitive film is provided between engine oil chamber and pressure sensitive chamber；Engine oil chamber bottom is provided with slide valve；And then guarantee wellbore integrity, effectively simplify installation.Invention additionally discloses a kind of completion interval of well body structures of deep water hydrocarbon well simultaneously comprising above-mentioned pressure relief tool, the pressure relief tool have above-mentioned beneficial effect.
Description
Technical field
The present invention relates to a kind of pressure relief tools, especially with regard to a kind of release applied in deep water hydrocarbon well production process
The renewable type pressure relief tool and completion interval of well body structure of annular space trapped pressure.
Background technique
High temperature fluid during production, to closed annular space fluid heat transferring, causes closed annular fluid heated during output
Expansion causes annular space trapped pressure to rise, and there is the risk squeezed and ruin or burst casing.Ring between flow string and production casing
Sky can discharge liquid swelling volume by the annular space relief valve on the subsea equipment that is attached thereto.Then not for other annular spaces
There are pressure relief channels.At present in the annular space trapped pressure control measures engineering of other annular spaces mainly using rupture disk and
Compressible foam carries out pressure release, this method can only a pressure release, can also destroy wellbore integrity after rupture disk work, and rupture
Disk and the mounting process of compressible foam are complex.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of renewable type pressure relief tools for discharging annular space trapped pressure
And completion interval of well body structure, it is able to achieve renewable type pressure release not only to guarantee wellbore integrity, moreover it is possible to effectively simplify pressure relief tool
Install and use technique.
To achieve the above object, the present invention takes following technical scheme：A kind of renewable type discharging annular space trapped pressure
Pressure relief tool, it is characterised in that：It includes main body, and flow channels, filter screen, the feeling of stress of setting on the body
Answer chamber, pressure sensitive film, engine oil chamber and slide valve；The pressure sensitive chamber is located in the middle part of the main body, the feeling of stress
Chamber side is answered to be connected to through the flow channels with annular space trap, the annular space trap is by casing, outer layer sleeve, casing cement
Ring and underwater well head surround the confined space to be formed；Positioned at the flow channels side, in the flow channels and the pressure
The filter screen is provided between induction chamber；The pressure sensitive chamber other side is provided with the engine oil chamber, the machine
Grease chamber is arranged in parallel with the pressure sensitive chamber, and the pressure is provided between the engine oil chamber and pressure sensitive chamber
Power sensor film；The engine oil chamber bottom is provided with the slide valve.
Further, the slide valve includes valve body, pressure release chamber, pressure relief channels, elastomer and valve base；Institute
It states body top to connect with the engine oil chamber bottom, the body base is provided with the valve base, on the valve base
It is provided with the elastomer, the elastomer is between the valve base and the body base；Two in the middle part of the valve body
Side is respectively arranged with the pressure relief channels, which blocks under elastomer effect；It is released positioned at the pressure
It puts above channel, the pressure release chamber is provided in the valve body.
Further, it is located at the valve base upper and lower ends, elastomer upper and lower ends and pressure release chamber or more two
End is symmetrically arranged one group of metal o-ring.
Further, the elastomer applies a starting pressure to the valve body, and the machine oil indoor liquid is under pressure sense
When the pressure for answering film extrusion to generate is greater than starting pressure, the valve body compresses the elastomer, the pressure release chamber with
The pressure relief channels connection, is in pressure release state；The engine oil chamber liquid is generated by the pressure sensitive film extrusion
Pressure be less than starting pressure when, the elastomer is in free state, and the valve body blocks the pressure relief channels, institute
It states pressure release chamber not to be connected to the pressure relief channels, be in close state.
Further, force adjustment mechanism is constituted by the elastomer, pressure sensitive film and engine oil chamber, passes through the elastomer
Length, by the type of the pressure sensitive film, pass through the engine oil chamber sectional area size and adjust starting pressure and close pressure
Power size.
Further, the flow channels other side is provided with pressure safety valve, and the pressure safety valve is previously provided with brokenly
Split pressure, the fracture pressure are greater than the maximum pressure that the pressure safety valve is born in well cementing process, are less than the pressure release
The starting pressure of tool；The starting pressure of the pressure relief tool should be less than the maximum pressure of outer layer annular space permission.
Further, the chamber for accommodating the valve body and valve seat is provided in the main body, the valve body can be described
Chamber indoor sport.
Further, the pressure relief tool is arranged in casing coupling, the length direction and described sleeve pipe box cupling of the chamber
Axial direction it is parallel.
Further, the deformation direction of the elastomer is identical as the length direction of the chamber, and the elastomer is cylinder
Spring.
A kind of completion interval of well body structure of deep water hydrocarbon well comprising above-mentioned pressure relief tool.
The invention adopts the above technical scheme, which has the following advantages：1, the present invention is for administering deep water annular space circle
Close stress problems.After entering well, multiple pressure release can not only be able to achieve and restored, moreover it is possible to guarantee the complete of pit shaft to a certain extent
Whole property.2, the present invention is in installation and use process, it is only necessary to complete basic casing job process and complete tool
Installation does not need additional specialized operations, installs and simpler, quick using technique.3, the configuration of the present invention is simple, manufacture at
This cheap, working life and high reliablity are conducive to protect deep water hydrocarbon well shaft integrality.
Detailed description of the invention
Fig. 1 is pressure relief tool structural schematic diagram of the invention；
Fig. 2 is Casing Program of Deepwater Well figure of the invention；
Fig. 3 is the installation diagram of pressure relief tool of the invention in Fig. 2.
Specific embodiment
In the description of the present invention, it is to be understood that, the orientation or position of the instructions such as term " on ", "lower" "inner", "outside"
Setting relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, rather than
The device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot
It is interpreted as limitation of the present invention.The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention provides a kind of renewable type pressure relief tool for discharging annular space trapped pressure, for preventing depth
Destruction of the annular space trapped pressure that aqueous hydrocarbon well generates in process of production to pit shaft.The present invention includes renewable type annular space trap
The main body 1 of pressure relief tool, and pressure sensitive chamber 2, flow channels 3, the filter screen 4, pressure security of setting on the body 1
Valve 5, engine oil chamber 6, pressure sensitive film 7 and slide valve.
Pressure sensitive chamber 2 is located at 1 middle part of main body, and 2 side of pressure sensitive chamber connects through flow channels 3 and annular space trap 8
Logical, annular space trap 8 is to surround the confined space formed by casing 9, outer layer sleeve, casing cement sheath 10 and underwater well head 11；Position
In 3 side of flow channels, filter screen 4,3 other side of flow channels are provided between flow channels 3 and pressure sensitive chamber 2
It is provided with pressure safety valve 5, pressure safety valve 5 is previously provided with fracture pressure, renewable type ring when fracture pressure is higher than well cementation
The maximum pressure that barren trap pressure relief tool is born, to protect renewable type annular space trap pressure relief tool administering annular space trapped pressure
It is not destroyed before problem.2 other side of pressure sensitive chamber is provided with engine oil chamber 6, and engine oil chamber 6 is parallel with pressure sensitive chamber 2
Setting, and pressure sensitive film 7 is provided between engine oil chamber 6 and pressure sensitive chamber 2.It is arranged positioned at 6 bottom of engine oil chamber
There is slide valve.
In above-described embodiment, slide valve includes that valve body 12, valve base 13, elastomer 14, pressure relief channels 15, pressure are released
Put chamber 16 and metal o-ring 17.12 top of valve body is connect with 6 bottom of engine oil chamber, and 12 bottom of valve body is provided with valve base
13, elastomer 14 is provided on valve base 13, and elastomer 14 is located between 12 bottom of valve base 13 and valve body, the elastomer
14 for applying a starting pressure to valve body 12.12 on both sides of the middle of valve body is respectively arranged with pressure relief channels 15, which releases
Channel 15 is put to block under the effect of elastomer 14；Above pressure relief channels 15, pressure release is provided in valve body 12
Chamber 16.Wherein, it is located at 13 upper and lower ends of valve base, 14 upper and lower ends of elastomer and pressure and discharges chamber about 16 two
End is symmetrically arranged one group of metal o-ring 17.In use, the liquid sensor film 7 that is under pressure is squeezed and is produced in the engine oil chamber 6
When raw pressure is greater than the starting pressure of valve body 12,12 compresses elastomeric 14 of valve body, pressure discharges chamber 16 and pressure release is logical
Road 15 is connected to, and is in pressure release state；When 6 liquid of engine oil chamber be under pressure sensor film 7 squeeze generate pressure be less than valve body 12
Starting pressure when, elastomer 14 is in free state, and valve body 12 blocks pressure relief channels 15, pressure discharge chamber 16 with
Pressure relief channels 15 are not connected to, and are in close state.
In the various embodiments described above, the main body 1 of pressure relief tool of the invention is fixed in casing coupling 18, can also be set
It sets in casing stabbing board or in sleeve body.
In above-described embodiment, it is provided with the chamber for accommodating valve body 12 and valve base 13 in main body 1, valve body 12 can be with
In chamber indoor sport.It can be cylindrical chamber, or rectangular in the present embodiment for the shape of chamber without limitation
Fluid chamber etc. can be adapted with the shape of main body 1.
In a preferred embodiment, as shown in Fig. 2, the length direction of chamber is equal with the axial direction of casing coupling 18
Row, elastomer 14 can be flexible in the length direction of chamber.
In the various embodiments described above, the original state of elastomer 14 is free state, renewable type annular space trap pressure relief tool
It is closed under elastomer free state.Decrement by controlling elastomer 14 can control the starting pressure of valve body 12.
In the various embodiments described above, the deformation direction of elastomer 14 and the length direction of chamber are identical.Elastomer 14 is preferably
Tower spring or wind spring etc. also can be used in cylindrical spring, elastomer 14.
In the various embodiments described above, force adjustment mechanism is constituted by elastomer 14, pressure sensitive film 7 and engine oil chamber 6, to realize essence
Really control pressure relief tool unlatches and closes opportunity.By the length of elastomer 14, by the type of pressure sensitive film 7, lead to
6 sectional area size of engine oil chamber is crossed to adjust starting pressure and close pressure size.When force adjustment mechanism setting starting pressure, for alleviating
Annular space trapped pressure problem；It is complete with pit shaft when ensuring that there is no trapped pressure problem when pressure is closed in the setting of force adjustment mechanism
Property.The restorability of renewable type annular space trap pressure relief tool is realized by force adjustment mechanism.
As a preferred embodiment, renewable type annular space trap pressure relief tool is used for outer layer annular space inner layer annular space
Unidirectional pressure release.
In the various embodiments described above, the fracture pressure that pressure safety valve 5 is arranged is greater than pressure safety valve 5 and holds in well cementing process
The maximum pressure received, less than the starting pressure of renewable type annular space trap pressure relief tool；Renewable type annular space trap pressure relief tool
Starting pressure should be less than outer layer annular space permission maximum pressure.
In the use of the present invention, when annular space trap 8 fluid by flow string high temperature fluid heat transfer cause to be heated it is swollen
It is swollen, cause expansion fluid to rack pressure safety valve 5, flows through flow channels 3 and filter screen 4；Pressure sensitive film 7 is by by ring
Fluid expansion deforms in barren trap 8, the engine oil chamber 6 of 7 right end of squeeze pressure sensor film；6 inner engine oil of engine oil chamber generates liquid
Pressure pushes 12 compresses elastomeric 14 of valve body, and pressure release chamber 16 is connected to pressure relief channels 15；External rings barren trap 8 it is swollen
Dilatant body flows in inner loop control trap relatively low pressure space through excess pressure release chamber 16 and pressure relief channels 15, to make
It obtains inner and outer ring barren trap and reaches pressure balance, renewable type annular space trap pressure relief tool is in the open state；6 liquid of engine oil chamber by
When the pressure for squeezing generation to pressure sensitive film 7 is less than the starting pressure of valve body 12,14 body of elastomer is in free shape always
State, blocks the inner and outer ring barren trap to be connected to, and renewable type annular space trap pressure relief tool is in close state.
It follows that the renewable type pressure relief tool 19 in the present embodiment is applied to valve body 12 by elastomer 14 and opens
Dynamic pressure, so that external rings barren trap fluid caused by being conducted heat by high temperature fluid in flow string can only single flow direction inside annular space
Trap 8；When external 8 pressure of annular space trap is higher than annular space license maximum pressure for the first time, pressure safety valve 5 is squeezed and broken, pressure peace
Full valve 5 can prevent renewable type annular space trap pressure relief tool from being damaged by well cementing process before rupture, guarantee renewable type pressure release
The integrality of tool 19.The hydraulic starting pressure generated less than elastomer 14 of the engine oil chamber 6 caused by external 8 pressure of annular space trap
When, elastomer 14 affranchises state, and valve body 12 blocks pressure relief channels 15, ensure that the pit shaft of deep water hydrocarbon well is complete
Property.When 8 pressure of external rings barren trap increases again in process of production, and the hydraulic elastomer 14 that is higher than of caused engine oil chamber 6 produces
When raw starting pressure, elastomer 14 is pressurized again, so that pressure release chamber 16 is connected to again with pressure relief channels 15, it is slow
External rings barren trap pressure is solved, the restorability of pressure relief tool is realized.
As shown in Figure 2 and Figure 3, the present invention also provides a kind of completion interval of well body structures of deep water hydrocarbon well comprising above-mentioned release
The casing coupling type renewable type pressure relief tool and underwater well head 11 of annular space trapped pressure, casing 9 and casing cement sheath 10.
Between casing 9 and outer layer sleeve, annular space trap 8 is equipped between casing cement sheath 10 and underwater well head 11；It can equipped with band on casing 9
The casing coupling 18 of recovery formula pressure relief tool 19；Renewable type pressure relief tool 19 can be connected to casing inner and outer ring barren trap 8.
Casing 9 includes production casing, protective casing and surface pipe；Renewable type pressure relief tool 19 is arranged in production casing
Cement returns at high 100m, in 180 ° of symmetrical two groups of installations, for administering production casing, protective casing, underwater well head and life
Produce the fluid expansion pressure in the annular space trap of the cement sheath composition outside casing；Renewable type pressure relief tool 19 on production casing
Annular space trap pressure release of the annular space trap into production casing outside controllable production casing.Renewable type annular space trap pressure relief tool
Setting is returned at high 100m in protective casing cement, in 180 ° of symmetrical two groups of installations, is covered for Treatment process casing, surface layer
Fluid expansion pressure in the annular space trap of cement sheath composition outside pipe, underwater well head and protective casing；On protective casing can
Recovery formula pressure relief tool 19 can control annular space trap pressure release of the annular space trap outside protective casing into protective casing；Annular space trap
It is only capable of and the unidirectional pressure release of outer layers towards inner layers.
The various embodiments described above are merely to illustrate the present invention, and structure and size, setting position and the shape of each component are all can be with
It is varied, based on the technical solution of the present invention, the improvement and wait that all principles according to the present invention carry out individual part
With transformation, should not exclude except protection scope of the present invention.
Claims (10)
1. a kind of renewable type pressure relief tool for discharging annular space trapped pressure, it is characterised in that：It includes main body, and setting exists
Flow channels, filter screen, pressure sensitive chamber, pressure sensitive film, engine oil chamber and slide valve in the main body；
The pressure sensitive chamber is located in the middle part of the main body, and pressure sensitive chamber side is through the flow channels and annular space
Trap connection, the annular space trap is to surround the confined air formed by casing, outer layer sleeve, casing cement sheath and underwater well head
Between；Positioned at the flow channels side, the filter screen is provided between the flow channels and the pressure sensitive chamber
Net；The pressure sensitive chamber other side is provided with the engine oil chamber, and the engine oil chamber is parallel with the pressure sensitive chamber to be set
It sets, and is provided with the pressure sensitive film between the engine oil chamber and pressure sensitive chamber；Positioned at the engine oil chamber bottom
Portion is provided with the slide valve.
2. pressure relief tool as described in claim 1, it is characterised in that：The slide valve includes valve body, pressure discharges chamber, pressure is released
Put channel, elastomer and valve base；The body top is connect with the engine oil chamber bottom, and the body base setting is
Valve base is stated, the elastomer is provided on the valve base, the elastomer is located at the valve base and the valve
Between body bottom；The valve body on both sides of the middle is respectively arranged with the pressure relief channels, and the pressure relief channels are in elastomer
Effect is lower to be blocked；Above the pressure relief channels, the pressure release chamber is provided in the valve body.
3. pressure relief tool as claimed in claim 2, it is characterised in that：Above and below the valve base upper and lower ends, elastomer
Both ends and pressure release chamber upper and lower ends are symmetrically arranged one group of metal o-ring.
4. pressure relief tool as claimed in claim 3, it is characterised in that：The elastomer applies a starting pressure to the valve body,
The machine oil indoor liquid is under pressure sensor film when squeezing the pressure generated and being greater than starting pressure, described in valve body compression
Elastomer, the pressure release chamber are connected to the pressure relief channels, are in pressure release state；The engine oil chamber liquid by
When the pressure that the pressure sensitive film extrusion generates is less than starting pressure, the elastomer is in free state, the valve body
The pressure relief channels are blocked, the pressure release chamber is not connected to the pressure relief channels, is in close state.
5. pressure relief tool as claimed in claim 4, it is characterised in that：By the elastomer, pressure sensitive film and engine oil chamber structure
At force adjustment mechanism, by the length of the elastomer, by the type of the pressure sensitive film, pass through the engine oil chamber section
The big minor adjustment starting pressure of product and closing pressure size.
6. the pressure relief tool as described in any one of claim 1 to 5, it is characterised in that：The flow channels other side is provided with pressure
Power safety valve, the pressure safety valve are previously provided with fracture pressure, and the fracture pressure is greater than the pressure safety valve solid
The maximum pressure born during well, less than the starting pressure of the pressure relief tool；The starting pressure of the pressure relief tool is answered small
In the maximum pressure that outer layer annular space allows.
7. the pressure relief tool as described in any one of claim 2 to 5, it is characterised in that：It is provided in the main body for accommodating
The chamber of valve body and valve seat is stated, the valve body can be in the chamber indoor sport.
8. pressure relief tool as claimed in claim 7, it is characterised in that：The pressure relief tool is arranged in casing coupling, the chamber
The length direction of room is parallel with the axial direction of described sleeve pipe box cupling.
9. pressure relief tool as claimed in claim 7, it is characterised in that：The length of the deformation direction of the elastomer and the chamber
Direction is identical, and the elastomer is cylindrical spring.
10. a kind of completion interval of well body structure of deep water hydrocarbon well, which is characterized in that including as described in any one of claim 1 to 9
Pressure relief tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810627556.1A CN108843272B (en) | 2018-06-19 | 2018-06-19 | Recoverable pressure relief tool for releasing annular confining pressure and well completion well structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810627556.1A CN108843272B (en) | 2018-06-19 | 2018-06-19 | Recoverable pressure relief tool for releasing annular confining pressure and well completion well structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108843272A true CN108843272A (en) | 2018-11-20 |
| CN108843272B CN108843272B (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810627556.1A Active CN108843272B (en) | 2018-06-19 | 2018-06-19 | Recoverable pressure relief tool for releasing annular confining pressure and well completion well structure |
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| Country | Link |
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| CN (1) | CN108843272B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111964887A (en) * | 2020-08-17 | 2020-11-20 | 西南石油大学 | Casing annulus pressure relief tool simulation experiment device and test method |
| CN113187427A (en) * | 2021-04-28 | 2021-07-30 | 中国海洋石油集团有限公司 | Drilling-through type underwater horizontal Christmas tree and wellhead system |
| CN114263438A (en) * | 2021-12-15 | 2022-04-01 | 中海石油(中国)有限公司 | Deep water oil gas well casing bypass annular pressure release device and method thereof |
| CN114961643A (en) * | 2022-06-01 | 2022-08-30 | 西南石油大学 | Recoverable pressure relief device and method for releasing annular trapped pressure of sleeve |
| CN114961645A (en) * | 2022-05-23 | 2022-08-30 | 西南石油大学 | Multi-activation bidirectional pressure relief device and method for releasing annular trapping pressure of sleeve |
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| CN114263438B (en) * | 2021-12-15 | 2023-12-08 | 中海石油(中国)有限公司 | Device and method for releasing sleeve bypass annular pressure of deep water oil-gas well |
| CN114961645A (en) * | 2022-05-23 | 2022-08-30 | 西南石油大学 | Multi-activation bidirectional pressure relief device and method for releasing annular trapping pressure of sleeve |
| CN114961645B (en) * | 2022-05-23 | 2023-03-10 | 西南石油大学 | Multi-activation bidirectional pressure relief device and method for releasing annular trapping pressure of sleeve |
| CN114961643A (en) * | 2022-06-01 | 2022-08-30 | 西南石油大学 | Recoverable pressure relief device and method for releasing annular trapped pressure of sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108843272B (en) | 2020-06-30 |
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