CN206554847U - Compound force expansion pipe device - Google Patents
Compound force expansion pipe device Download PDFInfo
- Publication number
- CN206554847U CN206554847U CN201720139703.1U CN201720139703U CN206554847U CN 206554847 U CN206554847 U CN 206554847U CN 201720139703 U CN201720139703 U CN 201720139703U CN 206554847 U CN206554847 U CN 206554847U
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- Prior art keywords
- expansion
- slips
- cone
- fluid cylinder
- tube
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 101
- 239000012530 fluid Substances 0.000 claims abstract description 55
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000004873 anchoring Methods 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract description 13
- 238000010168 coupling process Methods 0.000 abstract description 13
- 238000005859 coupling reaction Methods 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 abstract description 4
- 239000003208 petroleum Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The utility model is related to compound force expansion pipe device, applied to petroleum industry drilling completion, well workover technology field.The stifled bottom installed in expansion tube in the device bottom, expansion cone is arranged on the expanding intracavitary of expansion tube, expansion cone arrangement above fluid cylinder mechanism, expansion cone anchor mechanism arranged below, the central tube lower end of fluid cylinder mechanism and expansion tube inner chamber hydraulic communication, piston is mutually fixed and is tightly connected with central tube, and fluid cylinder set is mutually fixedly connected with expansion cone；Expansion cone socket-connects and is slidingly sealed with central tube；Central tube lower end connects anchor mechanism.The device stacks up the hydraulic coupling of the hydraulic coupling of power cylinder and conventional art promotion expansion cone promotes expansion cone to realize the expansion to expansion tube jointly, so that pump pressure when considerably reducing operation, reduces operating risk, it is ensured that workmen's safety.
Description
Technical field
The present invention relates to petroleum industry drilling completion, well workover technology field, force expansion pipe device is more particularly to combined.
Background technology
The Solid expandable Manifold technology for being developed in the nineties in last century has played important in drilling well, completion and well workover technology field
Effect.
Initial bulged tube technology is to promote expansion cone using hydraulic coupling, while being superimposed drilling rod above carrying to expansion cone
Power completes to expand operation.
Chinese patent, application number 201010106783.3, applying date 2010.02.03, " expansion tube assembly, oil well subsidy are applied
Work mechanism and construction method " discloses the device and method that a kind of utilization expansion tube repairs damaged sleeve pipe, and the device is in expansion
The top of pipe sets a set of power cylinder, and expansion cone is set in the bottom of expansion tube, is provided with card again below expansion cone
Detent mechanism is hung, expansion tube is pushed down on the power cylinder top of the device, and the central tube of power cylinder holds downwards card and hangs detent mechanism, leads to
The pulling force for crossing power cylinder pulls up expansion cone and carrys out expansion pipe.It, which blocks extension detent mechanism, can unidirectionally block central tube,
As expansion cone provides thrust upward, and the demand that the multiple stroke of power cylinder is lifted up can be met again.
Chinese patent, application number 201310220019.2, applying date 2013.06.05, a kind of " expansion tube expansion process side
Method and tool system " discloses a kind of expansion pipe device, and the device is connected to power cylinder below expansion cone, under power cylinder
Face is connected to slips anchoring device again.During operation, slips anchoring device card is on sleeve pipe.Power cylinder above pushes away expansion by hydraulic coupling
Cone, under push away slips anchoring device.
Above-mentioned two bulged tube technologies are all to promote expansion cone to carry out expansion sleeve using the hydraulic coupling of power cylinder, work as quilt
The intensity of expansion tube it is higher, it is necessary to expansive force it is larger when, only to will result in operation hydraulic coupling higher for the power by power cylinder, exists
Security risk.
The content of the invention
In order to solve the above technical problems, having invented the compound force that ground hydraulic pump is pumped when operation can be greatly lowered
Expansion pipe device, reduces operating risk, it is ensured that workmen's safety.
To achieve the above object, the present invention is adopted the following technical scheme that：
Force expansion pipe device, the stifled bottom installed in expansion tube in bottom are combined, bottom is blocked up mutually to be fixed and the company of sealing with expansion tube
Connect, expansion tube bottom sets expanding chamber, expansion cone is arranged on described expanding intracavitary, expansion cone arrangement above fluid cylinder mechanism, expansion
Anchor mechanism arranged below is bored, the central tube of fluid cylinder mechanism is mutually fixedly connected through expansion cone with anchor mechanism；Expansion cone is with
Heart pipe socket-connects and is slidingly sealed, central tube lower end and expansion tube inner chamber hydraulic communication, the fluid cylinder set and expansion cone of fluid cylinder mechanism
Mutually it is fixedly connected.
Preferably, described anchor mechanism is slips anchoring mechanism, and described slips anchoring mechanism is "T"-shaped slot type slips
Anchor mechanism.Described slips anchoring mechanism can also be slips brake pad integral type slips anchoring mechanism.
Preferably, described anchor mechanism can also be hydraulic anchor anchor mechanism.
The operational method of compound force expansion pipe device, it is using described compound force expansion pipe device is included, and it is made
Industry step is,
A, with working string under compound force expansion pipe device to well in down-hole casing rent or bore hole；
B, working string upper end are connected with the hydraulic pump on ground；
C, startup hydraulic pump make the hydraulic coupling rise in compound force expansion pipe device central tube, promote expansion cone up swollen
Swollen expansion tube, fluid cylinder mechanism completes a up stroke；
D, stopping hydraulic pump, shed the hydraulic coupling in compound force expansion pipe device central tube；
E, above carry working string and make the up stroke of fluid cylinder mechanism；
F, repeat step c, d, e, until completing the expansion operation of whole expansion tubes.
The technological merit of the present invention is that the device promotes the hydraulic coupling of power cylinder and conventional art the liquid of expansion cone
Pressure superposition is got up promotes expansion cone to realize the expansion to expansion tube jointly, so that pump pressure when considerably reducing operation,
Reduce operating risk, it is ensured that workmen's safety.
Brief description of the drawings
When considered in conjunction with the accompanying drawings, by referring to following detailed description, can more completely more fully understand the present invention with
And the adjoint advantage of many of which is easily learnt, but accompanying drawing described herein is used for providing a further understanding of the present invention,
The part of the present invention is constituted, schematic description and description of the invention is used to explain the present invention, do not constituted to this hair
Bright improper restriction, wherein：
Fig. 1 is that the fluid cylinder mechanism in the structural representation of compound force expansion pipe device, figure is one-level fluid cylinder, anchor mechanism
For slips anchoring mechanism.
Fig. 2 is that the fluid cylinder mechanism in the structural representation of compound force expansion pipe device, figure is two grades of fluid cylinders, anchor mechanism
For slips anchoring mechanism.
Fig. 3 is the structural representation of compound force expansion pipe device, and auxiliary seal mechanism skin is provided with below expansion cone
Bowl packer.
Fig. 4 is the structural representation of compound force expansion pipe device, close provided with auxiliary seal mechanism below expansion cone
Seal baffle ring.
Fig. 5 is the structural representation of "T"-shaped slot type slips anchoring mechanism.
Fig. 6 is slips brake pad integral type slips anchoring mechanism structure schematic diagram.
Fig. 7 is that the anchor mechanism in the structural representation of compound force expansion pipe device, figure is hydraulic anchor anchor mechanism, its
In flow controller be water injection well choke.
Fig. 8 is the structural representation of hydraulic anchor.
Fig. 9 is that the anchor mechanism in the structural representation of compound force expansion pipe device, figure is hydraulic anchor anchor mechanism, its
In flow controller be choke valve.
Embodiment
In the narration explanation of this specification, described upper and lower position relation is identical with the position relationship illustrated in accompanying drawing,
This is also the mutual alignment relation between each component when instrument of the invention is applied in straight well.
As shown in Figure 1, force expansion pipe device, including expansion tube 2, expansion cone 4 and bottom stifled 6 are combined.The bottom of expansion tube 2 is set
Expanding chamber, expansion cone 4 is arranged on described expanding intracavitary.Bottom stifled 6 is arranged on the bottom of expansion tube 2, bottom stifled 6 and the phase of expansion tube 2
Fix and be tightly connected.Being mutually fixedly connected herein and described in the other parts of this specification, can be threaded connection, also may be used
Be welding；Described mutually fixes and is tightly connected, and can be sealing threaded connection, such as petroleum oil screw thread can be with right and wrong
Seal screw thread encryption seal connection or weld.
The peripheral hardware fluid cylinder of central tube 1 set 31 and piston 32, central tube 1, fluid cylinder set 31 and piston 32 collectively form fluid cylinder mechanism
3, wherein piston 32 and central tube 1 are mutually fixed and are tightly connected, fluid cylinder set 31 socket-connected with central tube 1 and formed first slide it is close
Front cover, fluid cylinder set 31 is socket-connected with piston 32 and forms the second sliding sealing surface, and the first sliding sealing surface is slidingly sealed with second
There is diameter difference in face, in setting inlet opening 7 on the side wall of central tube 1 between fluid cylinder set 31 and piston 32.
There are perforate and expansion tube 2 and bottom in the lower end of central tube 1 and the inner chamber hydraulic communication of expansion tube 2, that is, the lower end of central tube 1
Stifled 6 inner chambers formed are communicated.
Fluid cylinder set 31 is mutually fixedly connected with expansion cone 4；Expansion cone 4 socket-connects and is slidingly sealed with central tube 1；Central tube 1
Lower end is mutually fixedly connected with anchor mechanism 5.
In order to be discharged beneficial to liquid, fluid apertures 8 can also be set out on 31 side walls by being covered in fluid cylinder of the piston below 32.
Shown in Fig. 1 is to be covered by one-level fluid cylinder and the single-stage fluid cylinder mechanism that constitutes of first stage piston, fluid cylinder mechanism can be by
The Multi-stage hydraulic cylinder mechanism that Multi-stage hydraulic cylinder is covered and multi-level piston is constituted.As shown in Figure 2, this accompanying drawing illustrates two grades of fluid cylinder machines
Structure, including 202,1 grades of fluid cylinder sets of one-level fluid cylinder mechanism 201 and two grades of fluid cylinder mechanisms link together, other nexus elements with
Single-stage fluid cylinder mechanism is identical.The connected mode of fluid cylinder mechanism more than three-level is identical with the connected mode of two grades of fluid cylinder mechanisms.
Described anchor mechanism 5 is slips anchoring mechanism, as shown in Figure 5, and described slips anchoring mechanism is "T"-shaped slot type
Slips anchoring mechanism, this is a kind of anchor mechanism commonly used in the type of oil field well 211 or 221 type packers, also referred to as " dovetail
Groove " formula slips anchoring mechanism, including lower center tube 56, grappling cone 51, slips 52, slips support 53, spring 54 and gear cap 55, grappling
Cone 51, slips support 53, spring 54 and gear cap 55 are sequentially socketed in outside lower center tube 56 from top to bottom, wherein, grappling cone 51 and gear
Cap 55 is also mutually fixedly connected with lower center tube 56；Grappling cone 51 on the periphery of slips support 53 with being all provided with "T"-shaped groove, and slips 52 is installed
In described "T"-shaped groove.
Described spring 54 can be disc spring or cylindroid helical-coil compression spring.
By the above-mentioned narration of the present invention as can be seen that the compound force expansion pipe device of the present invention includes expansion tube and bottom
Stifled, expansion cone, fluid cylinder mechanism and anchor mechanism.Expansion tube bottom, bottom is stifled to set expanding chamber above, and expansion cone is arranged on expanding chamber
It is interior；More than expansion cone set fluid cylinder mechanism, expansion cone is to divide into anchor mechanism.Central tube passes through expansion cone, upper even fluid cylinder from center
Mechanism, lower even anchor mechanism, central tube is both a part for fluid cylinder mechanism, is also a part for anchor mechanism；Fluid cylinder mechanism
Fluid cylinder set is connected with expansion cone, and the piston of fluid cylinder mechanism under central tube by connecting anchor mechanism.Under when pushing away anchor mechanism, grappling machine
Structure is stuck on the inwall of expansion tube by slips, when above carrying anchor mechanism, and it is up along expansion tube that anchor mechanism then releases grappling.
Under action of hydraulic force, anchor mechanism is pushed away under fluid cylinder mechanism, and to block expansion tube motionless, and its counter-force then passes through fluid cylinder set pull-up expansion cone
It is up, realize the expansion to sleeve pipe.Expansion cone is with central, tubular into being slidingly sealed, and the periphery of expansion cone also forms close with expansion tube
Front cover, action of hydraulic force also promotes expansion cone up in the lower end of expansion cone.Expansion cone receives the upward of fluid cylinder mechanism simultaneously
The lifting force of pulling force and hydraulic coupling, the two power combine, and compared with the hydraulic coupling of single expansion operation, can substantially reduce.
Basic ideas and principle based on above-mentioned design, described slips anchoring mechanism can also be slips brake pad one
Formula slips anchoring mechanism, this is also another anchor mechanism commonly used in the type of oil field well 211 or 221 type packers.Such as Fig. 6
Shown, slips brake pad integral type slips anchoring mechanism includes lower center tube 56, cone 61, friction slips 62, snap ring 63, small bullet
Spring 64, slips collet 65 and baffle ring 66.Cone 61, slips collet 65 and baffle ring 66 are sequentially enclosed on lower center tube 56 from top to bottom
Outside, and cone 61 and baffle ring 66 are also mutually fixedly connected with lower center tube 56；Slips collet 65 sets section as " J " shape endless groove, rubs
Wipe the lower end of slips 62 to be arranged in described " J " shape endless groove, little spring 64 is transversely mounted on friction slips 62 and slips collet
Between 65, snap ring 63 is enclosed on friction slips 62 periphery.
Basic ideas and principle based on above-mentioned design, described anchor mechanism 5 can also be hydraulic anchor anchor mechanism.See
Shown in Fig. 7 and Fig. 8, described hydraulic anchor anchor mechanism includes hydraulic anchor 71 and is connected to the flow controller 73 of its underpart.Described
Flow controller 73 can be water injection well choke 74.Described water injection well choke 74 is exactly to set throttle orifice 75 on one block of plate, is commonly called as throttle orifice
Plate.When flow controller produces chock pressure difference, anchor tooth 72 is just anchored on expansion inside pipe wall.Certainly, when the throttling of water injection well choke 74
The diameter minimum of hole 75 can be 0, now, and the anchorage force of anchor tooth 72 is maximum.
Described flow controller 73 can also be choke valve 80, as shown in Figure 9, and throttle valve body 83 is connected with hydraulic anchor, throttling
Valve body 83 sets axial shoulder hole, and ball 81 is arranged in described shoulder hole, and plug 84 is arranged on shoulder hole bottom, plug 84 and ball
Valve spring 82 is installed between 81.Choke valve 80 can also be the conventional throtting water flow regulator of oil field well water injection string.
In order to improve expansion cone expand it is up during sealing effectiveness, described expansion cone is below 4 in outside central tube 1
Also it is cased with auxiliary seal mechanism.As shown in Figure 3, described auxiliary seal mechanism is cup packer 311.Cup packer is oil
One of conventional instrument in field underground.As shown in Figure 4, described auxiliary seal mechanism can also be sealing ring baffle ring, that is,
The periphery of expansion cone 4 sets sealing ring 411.
Compound force expansion pipe device is connected by central tube with working string.Its job step is：
A, with working string under compound force expansion pipe device to well in down-hole casing rent or bore hole；
B, working string upper end are connected with the hydraulic pump on ground；
C, startup hydraulic pump make the hydraulic coupling rise in compound force expansion pipe device central tube, promote expansion cone up swollen
Swollen expansion tube, fluid cylinder mechanism completes a up stroke；
D, stopping hydraulic pump, shed the hydraulic coupling in compound force expansion pipe device central tube；
E, above carry working string and make the up stroke of fluid cylinder mechanism；
F, repeat step c, d, e, until completing the expansion operation of whole expansion tubes.
Obviously, those skilled in the art belong to the guarantor of the present invention based on many modifications and variations that spirit of the invention is done
Protect scope.
Claims (14)
1. compound force expansion pipe device, bottom is blocked up（6）Installed in expansion tube（2）Bottom, bottom block up（6）With expansion tube（2）Xiang Gu
Determine and be tightly connected, expansion tube（2）Bottom sets expanding chamber, expansion cone（4）Installed in described expanding intracavitary, it is characterised in that
Expansion cone（4）Arrangement above fluid cylinder mechanism（3）, expansion cone（4）Anchor mechanism arranged below（5）, fluid cylinder mechanism（3）Central tube
（1）Through expansion cone（4）With anchor mechanism（5）Mutually it is fixedly connected；Expansion cone（4）With central tube（1）Socket-connect and be slidingly sealed,
Central tube（1）Lower end and expansion tube（2）Inner chamber hydraulic communication, fluid cylinder mechanism（3）Fluid cylinder set（31）With expansion cone（4）It is mutually fixed
Connection.
2. compound force expansion pipe device according to claim 1, it is characterised in that described fluid cylinder mechanism（3）In
Heart pipe（1）, fluid cylinder set（31）And piston（32）Collectively form；Central tube（1）Peripheral hardware fluid cylinder set（31）And piston（32）, wherein living
Plug（32）With central tube（1）Mutually fix and be tightly connected, fluid cylinder set（31）With central tube（1）Socket-connect and formed first slip it is close
Front cover, fluid cylinder set（31）With piston（32）Socket-connect and form the second sliding sealing surface, the first sliding sealing surface and second slide
There is diameter difference, fluid cylinder set in sealing surface（31）And piston（32）Between in central tube（1）Inlet opening is set on the wall of side（7）.
3. compound force expansion pipe device according to claim 2, it is characterised in that described fluid cylinder mechanism（3）It is two
It is more than level.
4. compound force expansion pipe device according to claim 1, it is characterised in that described anchor mechanism（5）It is card
Watt anchor mechanism.
5. compound force expansion pipe device according to claim 4, it is characterised in that described slips anchoring mechanism is
"T"-shaped slot type slips anchoring mechanism, including lower center tube（56）, grappling cone（51）, slips（52）, slips support（53）, spring
（54）With gear cap（55）, grappling cone（51）, slips support（53）, spring（54）With gear cap（55）Sequentially be socketed in from top to bottom it is lower in
Heart pipe（56）Outside, wherein, grappling cone（51）With gear cap（55）Also mutually it is fixedly connected with lower center tube；Grappling is bored（51）With slips support
（53）On be all provided with "T"-shaped groove, slips（52）In described "T"-shaped groove.
6. compound force expansion pipe device according to claim 5, it is characterised in that described spring（54）Be disc spring or
Cylindroid helical-coil compression spring.
7. compound force expansion pipe device according to claim 4, it is characterised in that described slips anchoring mechanism is card
Watt brake pad integral type slips anchoring mechanism, including lower center tube（56）, cone（61）, friction slips（62）, snap ring（63）, it is small
Spring（64）, slips collet（65）And baffle ring（66）, cone（61）, slips collet（65）And baffle ring（66）Sequentially cover from top to bottom
In lower center tube（56）Outside, and cone（61）And baffle ring（66）Also mutually it is fixedly connected with lower center tube；Slips collet（65）If disconnected
Face is " J " shape endless groove, and rub slips（62）Lower end is arranged in described " J " shape endless groove, little spring（64）It is transversely mounted
In friction slips（62）With slips collet（65）Between, snap ring（63）It is enclosed on friction slips（62）Periphery.
8. compound force expansion pipe device according to claim 1, it is characterised in that described anchor mechanism（5）It is water
Power anchor anchor mechanism.
9. compound force expansion pipe device according to claim 8, it is characterised in that described hydraulic anchor anchor mechanism bag
Include hydraulic anchor（71）Be connected to hydraulic anchor（71）The flow controller of bottom（73）.
10. compound force expansion pipe device according to claim 9, it is characterised in that described flow controller（73）For section
Flowing water mouth（74）.
11. according to the compound force expansion pipe device described in claim 9, it is characterised in that described flow controller（73）For throttling
Valve（80）.
12. compound force expansion pipe device according to claim 1, it is characterised in that described expansion cone（4）Below in
Central tube（1）Also it is cased with auxiliary seal mechanism outside.
13. compound force expansion pipe device according to claim 12, it is characterised in that described auxiliary seal mechanism is
Cup packer（311）.
14. compound force expansion pipe device according to claim 12, it is characterised in that described auxiliary seal mechanism is
Sealing ring baffle ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720139703.1U CN206554847U (en) | 2017-02-16 | 2017-02-16 | Compound force expansion pipe device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720139703.1U CN206554847U (en) | 2017-02-16 | 2017-02-16 | Compound force expansion pipe device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206554847U true CN206554847U (en) | 2017-10-13 |
Family
ID=60010339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720139703.1U Withdrawn - After Issue CN206554847U (en) | 2017-02-16 | 2017-02-16 | Compound force expansion pipe device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206554847U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703732A (en) * | 2017-02-16 | 2017-05-24 | 中国石油化工股份有限公司 | Device for applying force on expansion pipe in a combined mode and operating method of device |
| CN109630052A (en) * | 2018-12-18 | 2019-04-16 | 中国石油大学(华东) | Hydraulic control pressuring expansion pipe automatic expanding device |
| CN109653697A (en) * | 2017-10-11 | 2019-04-19 | 中国石油化工股份有限公司 | Oil pipe hydraulic cuts fishing tool |
| CN110552650A (en) * | 2019-09-24 | 2019-12-10 | 中国石油集团渤海钻探工程有限公司 | Temporary well head block |
| CN116291299A (en) * | 2023-03-16 | 2023-06-23 | 河海大学 | Rapidly-rebounded compression type oil cylinder packer and packer sealing method |
-
2017
- 2017-02-16 CN CN201720139703.1U patent/CN206554847U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106703732A (en) * | 2017-02-16 | 2017-05-24 | 中国石油化工股份有限公司 | Device for applying force on expansion pipe in a combined mode and operating method of device |
| CN106703732B (en) * | 2017-02-16 | 2023-12-01 | 中国石油化工股份有限公司 | Composite force-application expansion pipe device and operation method thereof |
| CN109653697A (en) * | 2017-10-11 | 2019-04-19 | 中国石油化工股份有限公司 | Oil pipe hydraulic cuts fishing tool |
| CN109630052A (en) * | 2018-12-18 | 2019-04-16 | 中国石油大学(华东) | Hydraulic control pressuring expansion pipe automatic expanding device |
| CN110552650A (en) * | 2019-09-24 | 2019-12-10 | 中国石油集团渤海钻探工程有限公司 | Temporary well head block |
| CN116291299A (en) * | 2023-03-16 | 2023-06-23 | 河海大学 | Rapidly-rebounded compression type oil cylinder packer and packer sealing method |
| CN116291299B (en) * | 2023-03-16 | 2023-11-17 | 河海大学 | Rapidly-rebounded compression type oil cylinder packer and packer sealing method |
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Granted publication date: 20171013 Effective date of abandoning: 20231201 |
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| AV01 | Patent right actively abandoned |
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| AV01 | Patent right actively abandoned |