CN104265236B - Drilling liner cementing tail pipe seat extension ball injector and control method thereof - Google Patents
Drilling liner cementing tail pipe seat extension ball injector and control method thereof Download PDFInfo
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- CN104265236B CN104265236B CN201410361762.4A CN201410361762A CN104265236B CN 104265236 B CN104265236 B CN 104265236B CN 201410361762 A CN201410361762 A CN 201410361762A CN 104265236 B CN104265236 B CN 104265236B
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- screw
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- 238000005553 drilling Methods 0.000 title claims abstract description 29
- 210000000078 Claw Anatomy 0.000 claims abstract description 30
- 239000004568 cement Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 5
- 230000001808 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000003345 natural gas Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000002123 temporal effect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000003014 reinforcing Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Abstract
The invention discloses a kind of drilling liner cementing tail pipe seat extension ball injector and control method thereof, belong to oil, natural gas extraction technical field.The present invention includes assembling set and reservoir body；Described reservoir body is formed in being located at assembling set and accommodates chamber；The screw arranged in described reservoir body, passes outwards through reservoir body from accommodating intracavity and is connected with reciprocal delivery device；Described reservoir body is provided with and is positioned at the multiple supports accommodating intracavity, and described support is provided with holding claws, and the end of described screw coordinates jointly with holding claws catches seat to hang ball in accommodating intracavity.Present invention is mainly used for solving ball injector existence in prior art and remotely control the interim problem lost efficacy, it is not necessary to again cementing head is unloaded manual pitching, it is ensured that pitching and the reliability of well cementing operation.
Description
Technical field
The present invention relates to oil, natural gas extraction technical field, rotary cement head during especially a kind of rotary tail well cementation
On ball injector.
Background technology
Well cementation, it is simply that utilize cementing equipment under enter in the Oil/gas Well of sleeve pipe casing annulus cementing, make sleeve pipe
And between stratum, produce effective sealing.Need during this to use extension hanger by tail pipe (sleeve pipe) and upper strata sleeve pipe phase
Connecting, most of tail pipes are hung and can be put mechanism according to its seat and classify, or put formula for hydraulic seat, or put for mechanical block
Formula.Hydraulic seat is put the seat that formula tail pipe hangs and put mechanism is that the fluid pressure difference of hydraulic cylinder in profit is hung by tail pipe realizes seat and puts.
During transferring to prevent tail pipe from hanging over, unexpected seat is hung, and hydraulic cylinder can be sheared pin and be fixed up.Under normal circumstances
Circulating pressure only seat bleeds off pressure the 50% of power.Be typically based on tail pipe hang seat put program need by ground pitching, make ball fall
On support hoop, by the shake-up hydraulic cylinder that builds the pressure, the gravity that then release tail pipe is hung realizes seat and puts.
Land reinforcing oil well pitching operation at present mainly disconnects the artificial pitching of pipeloop, and operational security is the highest, sea
The rotary cement head that upper oil field and oil field, minority land are used generally is equipped with ball injector, but ball injector be mostly pneumatic or
It is the long-range control form of hydrodynamic or purely manual, if encounter this kind of ball injector section when remotely controlling to lose efficacy temporarily, it is necessary to
Obtain and again cementing head is unloaded manual pitching, cause temporal waste.
Summary of the invention
The goal of the invention of the present invention is: for the problem of above-mentioned existence, it is provided that a kind of tail that can match with cementing head
Pipe well cementation tail pipe seat extension ball injector and control method thereof, be mainly used in solving ball injector existence in prior art and remotely control to face
Time the problem that lost efficacy, it is not necessary to again cementing head is unloaded manual pitching, it is ensured that the reliability of pitching and well cementing operation.This ball injector
Both may be mounted on general cementing head, and may be mounted at again and remotely control on rotary cement head and link control system realization far
Process control, can manually control again, and simple to operate, range is wide.
The technical solution used in the present invention is as follows:
The drilling liner cementing tail pipe seat extension ball injector of the present invention, including assembling set and reservoir body；Described reservoir body is located at dress
Supporting interior formation accommodates chamber；The screw arranged in described reservoir body, passes outwards through reservoir body from accommodating intracavity and pushes with reciprocal
Mechanism connects；Described reservoir body is provided with and is positioned at the multiple supports accommodating intracavity, and described support is provided with holding claws, described screw
End jointly coordinate with holding claws catch seat hang ball in accommodate intracavity.
Owing to have employed said structure, accommodate chamber and can be used for containing seat extension ball, wherein accommodating intracavity by multiple holdings
Pawl is firmly grasped, it is to avoid it skids off from receiving chamber, and the end of the screw that reservoir body passes hangs ball for push block, by screw rod
It is connected on reciprocal delivery device, the movement of screw rod can be controlled by reciprocal delivery device, it is achieved seat is hung the control of ball, also
Can also manually can be controlled by remotely control.Ball injector can be fixed on by assembling set and remotely control to rotate by the present invention
On cementing head, pneumatic inlet connects the control system of cementing head, it is achieved remotely control, it is also possible to manually control.By this
The drilling liner cementing tail pipe seat extension ball injector of invention, is mainly used in solving ball injector existence in prior art and remotely controls interim mistake
The problem of effect, it is not necessary to again cementing head is unloaded manual pitching, it is ensured that pitching and the reliability of well cementing operation.This ball injector both may be used
To be arranged on general cementing head, may be mounted at again and remotely control on rotary cement head and link control system realization remotely control
System, can manually control again, and simple to operate, range is wide.
The drilling liner cementing tail pipe seat extension ball injector of the present invention, described support is 4, and the most each support is equipped with guarantor
Holding pawl, the middle part of wherein said holding claws is bolted on support, makes the two ends of holding claws can put centered by bolt
Dynamic.
Owing to have employed said structure, 4 supports being respectively arranged with holding claws, the end of 4 holding claws and screw is altogether
With coordinating, promptly seat is hung ball and is avoided it to roll out from assembling set, wherein screw end circumference by with the contacting of holding claws so that
Holding claws left end opens and right-hand member Guan Bi, when screw is pushed the ball, has decontroled the left end of holding claws, and then holding claws right-hand member is pushed away by ball
Opening, ball moves right certain distance again and just can fall into well and suffer.
The drilling liner cementing tail pipe seat extension ball injector of the present invention, described reciprocal delivery device includes being connected with assembling external threading
Cylinder, described reservoir body is fixedly connected on cylinder, be configured with in described cylinder can opposing seal slide piston；Described work
Being provided with the balance nut that can relatively slide in plug, described piston one end is fixing with screw to be connected, and the other end of described piston passes through
Balance nut is threaded jackscrew, and described jackscrew passes from the end face of cylinder, is provided with and is placed between described piston and reservoir body
The spring of screw.
Owing to have employed said structure, can be owing to being to threaded between jackscrew with balance nut, flat by rotating jackscrew
Weighing apparatus nut and piston, be all by hub-like male cooperation between piston and cylinder, will not circumferentially rotate, therefore work as rotation
During jackscrew, balance nut can move right with piston, thus drive screw that seat is hung ball and release, and completes back piston and is pushed up by reversion
Silk and spring reset, so that it is guaranteed that being normally carried out of manual operation.
The drilling liner cementing tail pipe seat extension ball injector of the present invention, described piston inner wall is provided with chute in the axial direction,
Described balance nut outer wall is provided with the slide block gone up in the axial direction, makes the slide block on described balance nut and the chute on piston
Coupling also can be slided relatively；The groove that described cylinder inner wall is provided with, the described piston outer wall near reservoir body one end is provided with convex
Block, the projection on described piston and the matching grooves on cylinder also can relative slide.
Owing to have employed said structure, respectively by hub-like between balance nut and piston, between piston and cylinder
Protruding (namely slide block and chute) coordinates so that it will not circumferentially rotate each other, is only capable of relatively sliding, works as hands
The dynamic jackscrew that controls is when rotating, and balance nut can be made to drive piston relative to cylinder slide, thus complete pitching operation；When long-range gas
Dynamic when controlling, piston can be made relative to cylinder slide, thus complete pitching operation, the most just can ensure that what pitching worked normally enters
OK, make operation the easiest.
The drilling liner cementing tail pipe seat extension ball injector of the present invention, on described cylinder near end face sidewall on be provided with into
Mouthful, the groove on described cylinder sidewall is provided with free export.
Owing to have employed said structure, the groove on cylinder sidewall is provided with free export, namely on the right of piston
Cylinder outlet arranges a free export, the swabbing effect produced in can avoiding on the right of piston movement process cylinder；And enter
Mouthful then can connect in the control system of cementing head, it is simple to by long-range pneumatic control, namely use and pneumatic etc. remotely control
Time, control medium and enter from import, promote piston to move right, thus drive screw that seat is hung ball and release, complete back piston and lean on
Spring reset.
The drilling liner cementing tail pipe seat extension ball injector of the present invention, described cylinder is provided with compensation set with the junction of assembling set.
Owing to have employed said structure, compensate set and can be used for compensating the gap produced between cylinder and assembling set, it is to avoid add
The reasons such as work error cause the problem cannot fixed between cylinder and assembling set.
The control method of the drilling liner cementing tail pipe seat extension ball injector of the present invention, it is characterised in that: it includes:
1), remotely control
Assembling set is fixed on and remotely controls, on rotary cement head, import to be connected to the control pipeline of cementing head, control
Medium enters in cylinder from import, promotes piston movement, and piston driving screw moves relative to reservoir body, makes the end of screw make
Hang ball for seat, and be pushed out；After completing, piston resets under the action of the spring；
2), Non-follow control
Disconnect the control pipeline connected in import, rotate jackscrew, make balance nut drive piston movement, piston driving screw
Move relative to reservoir body, make the end of screw act on seat and hang ball, and be pushed out；Completing hands, opposite direction rotates jackscrew, lives
Plug resets under the action of the spring.
Owing to have employed said method so that the ball injector of the present invention may be mounted on general cementing head, both can also
It is arranged on and remotely controls on rotary cement head and link control system realization remotely control, it is also possible to manually control, effectively
Solve the problem that above-mentioned long-range control was lost efficacy temporarily, it is ensured that pitching and the reliability of well cementing operation.Even if remotely controlling
Lost efficacy, it is also possible to manually its operation of control realization, it is not necessary to again cementing head is unloaded manual pitching, causes temporal wave
Take.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, the drilling liner cementing tail pipe seat extension ball injector of the present invention, is mainly used in solving ball injector in prior art and exists remote
The problem that process control was lost efficacy temporarily, it is not necessary to again cementing head is unloaded manual pitching, it is ensured that pitching and the reliability of well cementing operation.
2, the drilling liner cementing tail pipe seat extension ball injector of the present invention, may be mounted on general cementing head, can install again
Remotely controlling on rotary cement head and linking control system realization remotely control, can manually control again, simple to operate,
Range is wide.
3, the control method of the drilling liner cementing tail pipe seat extension ball injector of the present invention, even if remotely controlling to lose efficacy, it is possible to
With its operation of manually control realization, it is not necessary to again cementing head is unloaded manual pitching, causes temporal waste.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is the structural representation of the drilling liner cementing tail pipe seat extension ball injector of the present invention.
Fig. 2 is the A-A sectional view in Fig. 1.
Fig. 3 is the B-B sectional view in Fig. 1.
Fig. 4 is the C-C sectional view in Fig. 1.
In figure: 1-jackscrew, 2-shaft block ring, 3,6,15-seal combination, 4-import, 5-cylinder, 7-balance nut, 8-live
Plug, 9-spring, 10-free export, 11-screw, 12-compensates set, 13-screw, 14-sealing ring, 16-dust ring, 17-cavity volume
Body, 18-holding claws, 19-packing ring, 20-bolt combination, 21-assembles set, and 22-seat hangs ball.
Detailed description of the invention
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive
Feature and/or step beyond, all can combine by any way.
Any feature disclosed in this specification (including any accessory claim, summary), unless specifically stated otherwise,
By other equivalences or there is the alternative features of similar purpose replaced.I.e., unless specifically stated otherwise, each feature is a series of
An example in equivalence or similar characteristics.
As shown in Figures 1 to 4, the drilling liner cementing tail pipe seat extension ball injector of the present invention, including assembling set 21 and reservoir body
17；Described reservoir body 17 is formed in being located at assembling set 21 and accommodates chamber；The screw 11 arranged in described reservoir body 17, from accommodating intracavity
Passing outwards through reservoir body 17 and be connected with reciprocal delivery device, described reciprocal delivery device includes and assembles what set 21 was threadeded
Cylinder 5, described cylinder 5 is provided with compensation set 12 with the junction of assembling set 21, and described reservoir body 17 is fixedly connected on cylinder 5,
Be configured with in described cylinder 5 can opposing seal slide piston 8, the groove that described cylinder 5 inwall is provided with, described piston 8 is close
The outer wall of reservoir body 17 one end is provided with projection, and the projection on described piston 8 and the matching grooves on cylinder 5 also can be relative sliding
Dynamic；Being provided with the balance nut 7 that can relatively slide in described piston 8, described piston 8 inwall is provided with chute in the axial direction,
Described balance nut 7 outer wall is provided with the slide block gone up in the axial direction, makes on the slide block on described balance nut 7 and piston 8
Chute coupling also can be slided relatively；Described piston 8 one end is fixing with screw 11 to be connected, and the other end of described piston 8 passes through piston 8
Threaded have jackscrew 1, and described jackscrew 1 passes from the end face of cylinder 5, is provided with and is placed on top between described piston 8 and reservoir body 17
Spring 9 outside silk 1；Being provided with import 4 on the sidewall of end face on described cylinder 5, the groove on described cylinder 5 sidewall sets
There is free export 10；Described reservoir body 17 is provided with and is positioned at multiple (can be arranged as required to be more than three) accommodating intracavity
Frame, using described support in this example is 4, the most each support is equipped with holding claws 18, in wherein said holding claws 18
Portion is bolted on support, makes the two ends of holding claws 18 can swing centered by bolt, the end of described screw 11 with
Holding claws 18 coordinates jointly catches seat extension ball 22 in accommodating intracavity, and as required when seat extension ball 22 volume is bigger, it can be less than
On the end of screw 11.Wherein screw end circumference by with the contacting of holding claws so that holding claws left end opens and right-hand member closes
Closing, when screw is pushed the ball, decontroled the left end of holding claws, and then holding claws right-hand member is pushed open by ball, ball moves right a spacing again
Suffer from well just can be fallen into.
Specifically, referring to the drawings 1, drilling liner cementing tail pipe seat extension ball injector of the present invention is waited remote controlled manner to drive by pneumatic
Time dynamic, flow media is entered cylinder 5 by import 4, thus promotes piston 8 to drive screw 11 to move right, thus seat is hung ball 22
Release, complete back piston and rely on spring 9 to reset.
With reference to accompanying drawing 1,2,3, drilling liner cementing tail pipe seat extension ball injector of the present invention leans between jackscrew 1 and balance nut 7
Threaded, it is that hub-like coordinates so that balance nut 7 with piston 8 not between balance nut 7 with piston 8, piston 8 and cylinder 5
Motion can be rotated.During manual actuation, disconnect pipeline at import 4, rotate jackscrew 1 drive balance nut 7 together with piston 8 to
Right motion, thus drive screw 11 that seat is hung ball 22 and release, complete back piston 8 and rely on reversion jackscrew 1 and spring 9 to reset.
With reference to accompanying drawing 1,4, drilling liner cementing tail pipe seat extension ball injector holding claws 18 of the present invention is bolted in reservoir body
On the support of 17, holding claws 18 can rotate around bolt.Shift piston 8 onto low order end so that holding claws 18 can be freely rotatable, this
Being can to put into seat from ball injector right-hand member to hang ball 22, screw 11 is retracted to high order end and blocks holding claws 18 by rotation jackscrew 1 afterwards
Left end makes holding claws right-hand member draw in, prevents seat from hanging ball and automatically drops out.
With reference to accompanying drawing 1, the cylinder 5 of drilling liner cementing tail pipe seat extension ball injector of the present invention has import 4 and free export 10
Two holes, import 4 connects remote boot server pipeline, and free export 10 is used for the swabbing effect avoided on the right of cylinder.
The drilling liner cementing tail pipe seat extension ball injector of the present invention, is mainly used in solving ball injector in prior art and exists remotely
Control the interim problem lost efficacy, it is not necessary to again cementing head is unloaded manual pitching, it is ensured that pitching and the reliability of well cementing operation.Can
To be arranged on general cementing head, may be mounted at again and remotely control on rotary cement head and link control system realization remotely control
System, can manually control again, and simple to operate, range is wide.
The control method of the drilling liner cementing tail pipe seat extension ball injector of the present invention, including:
1), when remotely controlling, assembling set 21 is fixed on and remotely controls, on rotary cement head, import 4 to be connected to cement
The control pipeline of head, controls medium and enters in cylinder 5 from import 4, promotes piston 8 to move, and piston 8 drives screw 11 relative to appearance
Cavity 17 moves, and makes the end of screw 11 act on seat and hangs ball 22, and is pushed out；After completing, piston 8 is under spring 9 acts on
Reset；During the most whole, medium will not be discharged from free export 10, and when piston 8 reaches least significant, its left side is close
Seal not can exceed that the starting position of cylinder groove；Free export 10 is intended merely to prevent the cavity of piston right-hand member from occurring suction to make
With and set because not having free export, this cavity is exactly a confined space, is unfavorable for the reciprocating motion of piston.
2), Non-follow control time, disconnect the control pipeline connected in import 4, rotate jackscrew 1, make balance nut 7 drive piston
8 motions, piston 8 drives screw 11 to move relative to reservoir body 17, makes the end of screw 11 act on seat and hangs ball 22, and is pushed away
Go out；Completing hands, opposite direction rotates jackscrew 1, and piston 8 resets under spring 9 acts on.
The invention is not limited in aforesaid detailed description of the invention.The present invention expands to any disclose in this manual
New feature or any new combination, and the arbitrary new method that discloses or the step of process or any new combination.
Claims (7)
1. drilling liner cementing tail pipe seat extension ball injector, it is characterised in that: it includes assembling set (21) and reservoir body (17)；Described appearance
Cavity (17) is formed in being located at assembling set (21) and accommodates chamber；The upper screw (11) arranged of described reservoir body (17), from accommodating intracavity
Pass outwards through reservoir body (17) and be connected with reciprocal delivery device；Described reservoir body (17) is provided with to be positioned at and accommodates the multiple of intracavity
Support, described support is provided with the holding claws (18) being mutually matched, and the end of described screw (11) is joined jointly with holding claws (18)
Conjunction catches seat to hang ball (22) in accommodating intracavity.
2. drilling liner cementing tail pipe seat extension ball injector as claimed in claim 1, it is characterised in that: described support is 4, wherein
Being equipped with holding claws (18) on each support, the middle part of wherein said holding claws (18) is bolted on support, makes guarantor
The two ends holding pawl (18) can swing centered by bolt.
3. drilling liner cementing tail pipe seat extension ball injector as claimed in claim 1 or 2, it is characterised in that: described reciprocal pusher
Structure includes the cylinder (5) threadeded with assembling set (21), and described reservoir body (17) is fixedly connected on cylinder (5), described gas
Be configured with in cylinder (5) can opposing seal slide piston (8)；Described piston is provided with, in (8), the balance nut that can relatively slide
(7), described piston (8) one end is fixing with screw (11) to be connected, and the other end of described piston (8) passes through balance nut (7) screw thread
Connecting has jackscrew (1), described jackscrew (1) to pass from the end face of cylinder (5), is provided with between described piston (8) and reservoir body (17)
It is placed on screw (11) spring (9) outward.
4. drilling liner cementing tail pipe seat extension ball injector as claimed in claim 3, it is characterised in that: set on described piston (8) inwall
Chute in the axial direction, described balance nut (7) outer wall is had to be provided with the slide block gone up in the axial direction, make described balance nut
(7) slide block on mates with the chute on piston (8) and can relative slide；The groove that described cylinder (5) inwall is provided with, described work
The plug (8) outer wall near reservoir body (17) one end is provided with projection, the projection on described piston (8) and the groove on cylinder (5)
Coupling also can be slided relatively.
5. drilling liner cementing tail pipe seat extension ball injector as claimed in claim 4, it is characterised in that: lean on described cylinder (5)
The sidewall of proximal end face is provided with import (4), and the groove on described cylinder (5) sidewall is provided with free export (10).
6. the drilling liner cementing tail pipe seat extension ball injector as described in claim 4 or 5, it is characterised in that: described cylinder (5) and dress
The junction of supporting (21) is provided with compensation set (12).
7. one kind uses the control method of drilling liner cementing tail pipe seat extension ball injector described in claim 5, it is characterised in that: its bag
Include:
Remotely control: assembling set (21) is fixed on and remotely controls on rotary cement head, import (4) is connected to the control of cementing head
Tubulation line, controls medium and enters in cylinder (5) from import (4), promote piston (8) motion, and piston (8) drives screw (11) relative
Move in reservoir body (17), make the end of screw (11) act on seat and hang ball (22), and be pushed out；After completing, piston (8) exists
Spring (9) effect is lower to be resetted；
Non-follow control: disconnect the upper control pipeline connected of import (4), rotate jackscrew (1), make balance nut (7) drive piston (8)
Motion, piston (8) drives screw (11) to move relative to reservoir body (17), makes the end of screw (11) act on seat and hangs ball
, and be pushed out (22)；After completing, opposite direction rotates jackscrew (1), and piston (8) resets under spring (9) acts on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410361762.4A CN104265236B (en) | 2014-07-28 | Drilling liner cementing tail pipe seat extension ball injector and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410361762.4A CN104265236B (en) | 2014-07-28 | Drilling liner cementing tail pipe seat extension ball injector and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104265236A CN104265236A (en) | 2015-01-07 |
| CN104265236B true CN104265236B (en) | 2017-01-04 |
Family
ID=
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4862966A (en) * | 1988-05-16 | 1989-09-05 | Lindsey Completion Systems, Inc. | Liner hanger with collapsible ball valve seat |
| EP0991847A1 (en) * | 1997-04-22 | 2000-04-12 | Jerry P. Allamon | Downhole surge pressure reduction system and method of use |
| CN202810736U (en) * | 2012-09-05 | 2013-03-20 | 上海管力卜石油设备有限公司 | Thermal recovery horizontal well expansion pipe hanger |
| CN102979470A (en) * | 2012-12-07 | 2013-03-20 | 中国石油集团西部钻探工程有限公司 | Uncemented expansion tail pipe hanger |
| CN202914028U (en) * | 2012-11-26 | 2013-05-01 | 中国石油集团长城钻探工程有限公司 | Tail pipe well cementation cement head |
| CN203441409U (en) * | 2013-09-18 | 2014-02-19 | 新疆贝肯能源工程股份有限公司 | Expansion type tail pipe hanging device of thermal production well |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4862966A (en) * | 1988-05-16 | 1989-09-05 | Lindsey Completion Systems, Inc. | Liner hanger with collapsible ball valve seat |
| EP0991847A1 (en) * | 1997-04-22 | 2000-04-12 | Jerry P. Allamon | Downhole surge pressure reduction system and method of use |
| CN202810736U (en) * | 2012-09-05 | 2013-03-20 | 上海管力卜石油设备有限公司 | Thermal recovery horizontal well expansion pipe hanger |
| CN202914028U (en) * | 2012-11-26 | 2013-05-01 | 中国石油集团长城钻探工程有限公司 | Tail pipe well cementation cement head |
| CN102979470A (en) * | 2012-12-07 | 2013-03-20 | 中国石油集团西部钻探工程有限公司 | Uncemented expansion tail pipe hanger |
| CN203441409U (en) * | 2013-09-18 | 2014-02-19 | 新疆贝肯能源工程股份有限公司 | Expansion type tail pipe hanging device of thermal production well |
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