CN109339725A - Releasing device - Google Patents
Releasing device Download PDFInfo
- Publication number
- CN109339725A CN109339725A CN201811305699.7A CN201811305699A CN109339725A CN 109339725 A CN109339725 A CN 109339725A CN 201811305699 A CN201811305699 A CN 201811305699A CN 109339725 A CN109339725 A CN 109339725A
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- China
- Prior art keywords
- lock claw
- sliding sleeve
- head
- connector
- top connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000000078 claw Anatomy 0.000 claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 230000008602 contraction Effects 0.000 claims abstract description 4
- 239000011229 interlayer Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 26
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000011324 bead Substances 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000000926 separation method Methods 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
Landscapes
- 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)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Earth Drilling (AREA)
Abstract
The present invention provides a kind of releasing device, it includes top connection, back-off connector, function sliding sleeve, lock claw loses head, head and lower contact are lost in rotation；Back-off connector is lost head thread with lock claw and is connect, and loses the interlayer between head in back-off connector and lock claw and is equipped with to rotate and loses head, is buckled to connector and rotation is lost and connected in a manner of transmitting torque between head, the bottom that head is lost in rotation is threadedly coupled with lower contact；Function sliding sleeve is slidably mounted on top connection, back-off connector and lock claw and loses in the cavity of head, and shear pin is equipped between function sliding sleeve and top connection, is equipped with steel ball portions in function sliding sleeve；The bottom that lock claw loses head is equipped with multiple lock claw, and the bottom end of function sliding sleeve is equipped with the lock claw protrusion of limitation lock claw radial contraction, and the middle part of function sliding sleeve is equipped with the annular groove for accommodating lock claw.By using the mode that top presses, the success rate of hydraulic releasing operation can be greatly improved.And it easily carries out machinery to give up operation.
Description
Technical field
The present invention relates to oil-gas mining field cemented the well well when the downhole tool field that uses, especially one kind give up dress
It sets.
Background technique
Releasing tool is a kind of common downhole tool in well-completing process, is mainly used for well cementing operation and fracturing work.
Occur usually in the form of safety joint in drilling well, well cementation and in terms of be generally termed releasing tool or automatic de- hang is tied
Structure.In well-completing process, often need to act pit shaft for a part of completion tubular column, another part completion tubular column stays in the wellbore；
In order to realize the requirement of these techniques, need to disengage lower part tubing string to reach using to releasing device in the construction process,
Top tubing string proposes the work of well head separation.With increasing for horizontal well, the especially staged fracturing of long horizontal sections naked eye gas well
Technique need to be given up work using drilling rod by underground open hole packer and staged fracturing tool string G.I.H using conventional pressure break
Tool not only cannot achieve tieback fracturing work, but also the process pipe string of tripping in and the success rate of feeding tubing string disengagement are lower, influence
Production efficiency.
Chinese patent literature CN202946065U describes a kind of pressure break releasing device, including center-pole, machinery are given up and connect
Head, positioning joint, lower contact, positioning sleeve, pawl cylinder and piston；Mechanical back-off sub include above give up connect cylinder and under give up connect cylinder,
On give up connect cylinder lower end inside and under give up connect cylinder upper end on the outside of be linked together, the lower end outside of center-pole and under give up and connect
The upper inner of cylinder is fixedly installed togather；One is fixedly mounted on the outside of the lower end inside of positioning joint and the middle part of lower contact
It rises.The program has the following problems that 1 is to need to install more slide unit between center-pole and tie-back sleeve, make center-pole with
Diameter difference between tie-back sleeve is more demanding, and structure is not compact.2 be to want for driving the cross section of piston smaller for building the pressure
Ask higher, the success rate that makes to give up is difficult to ensure.3, by the way of following pressure driving, the cross section of piston is caused to be limited
System.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of releasing devices, can be improved success rate of giving up, Neng Goufang
Just realization hydraulic releasing and machinery is given up a variety of modes of operation, and machinery is given up can individually complete work of giving up with hydraulic releasing
It industry and does not interfere with each other.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of releasing device, it includes above connecing
Head, back-off connector, function sliding sleeve, lock claw lose head, head and lower contact are lost in rotation；
Top connection is connect with back-off joint screw thread, and back-off connector is lost head thread with lock claw and connect, and loses head in back-off connector and lock claw
Between interlayer be equipped with rotation and lose head, be buckled to connector and rotation lost and connected in a manner of transmitting torque between head, head is lost in rotation
Bottom is threadedly coupled with lower contact；
Function sliding sleeve is slidably mounted on top connection, back-off connector and lock claw and loses in the cavity of head, in function sliding sleeve and above connects
It is equipped with the shear pin for locking axial displacement between head, is equipped in the upper end of function sliding sleeve and is sealed for being formed with steel ball of giving up
Steel ball portions, in lower contact be equipped with for make function sliding sleeve reset reset spring；
Lock claw loses head and the bulge-structure that locking axial position mutually is equipped between head is lost in rotation, and the bottom that lock claw loses head is equipped with more
A lock claw, the bottom end of function sliding sleeve are equipped with the lock claw protrusion of limitation lock claw radial contraction, and the middle part of function sliding sleeve is equipped with for holding
Receive the annular groove of lock claw.
In preferred scheme, sealing drum is additionally provided between top connection and lower contact, sealing drum is located at the outer wall of top connection,
The outer wall of top connection is slidably connected by sealing structure and sealing drum, and the bottom of sealing drum is connect with lower contact screw thread or transition.
In preferred scheme, at least one sealing ring is equipped between the inner wall of top connection and the outer wall of function sliding sleeve.
In preferred scheme, the shear pin is circumferentially uniformly distributed.
In preferred scheme, it is equipped with interior limit stage in the inner wall of top connection, with the top axial direction position of attributive function sliding sleeve
It sets；
It is equipped with sliding sleeve retention bead in the inner wall of back-off connector, with the bottom axial position of attributive function sliding sleeve.
In preferred scheme, the inner wall of lower contact is threadedly coupled with spring internal protective cover, spring internal protective cover and lower contact
Between constitute annular slide track, spring reset sliding sleeve and reset spring are mounted in annular slide track, the top of spring reset sliding sleeve with
The bottom of function sliding sleeve contacts, and the bottom of spring reset sliding sleeve is contacted with reset spring.
In preferred scheme, the inner and outer wall of spring reset sliding sleeve is equipped with O-ring seals, so that spring reset sliding sleeve
It is formed and is tightly connected with annular slide track.
In preferred scheme, the bottom of top connection is connect with the screw top of back-off connector.
In preferred scheme, the bottom for being buckled to connector is equipped with multiple torque inserted sheets, is equipped in the top exterior walls that head is lost in rotation
Multiple torque grooves, torque inserted sheet are inserted in torque groove.
In preferred scheme, the inner wall that head is lost in rotation is equipped with internal projection, and the lock claw outer wall that lock claw loses head is equipped with lock claw protrusion,
Internal projection contacts with the side of lock claw protrusion and is formed interlocking, and lock claw protrusion is located at the lower section of internal projection.
In preferred scheme, the side of internal projection and lock claw projection contacts is inclined-plane；
The free end of lock claw tends to shrink inwardly, so that internal projection and lock claw protrusion release axial lock.
A kind of releasing device provided by the invention, by using top press mode, be capable of increasing function sliding sleeve by
Pressure surface product especially cuts the success rate that shear pin and tube coupling disengage to greatly improve the success rate of hydraulic releasing operation.If
The back-off connector and rotation set lose the torque transfer arrangement of head, also can easily carry out machine after hydraulic releasing operation failure
Tool is given up operation, and job success ratio of giving up is greatly improved.Of the invention is compact-sized, and it is interior that operation success rate is higher, and device is through-flow
Diameter is larger, will not influence the operating efficiency of other tubing string sections.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is the overall structure diagram in the present invention.
Fig. 2 is A-A schematic cross-sectional view in Fig. 1.
Fig. 3 is B-B schematic cross-sectional view in Fig. 1.
Fig. 4 is C-C schematic cross-sectional view in Fig. 1.
Fig. 5 is D-D schematic cross-sectional view in Fig. 1.
Fig. 6 is the partial enlargement diagram in Fig. 1 at E.
Fig. 7 is the structural schematic diagram of top connection in the present invention.
Fig. 8 is the structural schematic diagram that lock claw loses head in the present invention.
Fig. 9 is the F-F schematic cross-sectional view of Fig. 8.
Figure 10 is the structural schematic diagram that head is lost in rotation in the present invention.
Figure 11 is the cross-sectional structure schematic diagram that head is lost in rotation in the present invention.
In figure: top connection 1, interior limit stage 101, sealing drum 2, steel ball 3 of giving up, sealing ring 4, function sliding sleeve 5, steel ball seat
Portion 51, annular groove 52, sliding sleeve protrusion 53, shear pin 6 are buckled to connector 7, sliding sleeve retention bead 71, and lock claw loses first 8, and lock claw is convex
Play 81, lock claw recessed portion 82, lock claw 83, rotation loses first 9, internal projection 91, torque groove 92, O-ring seals 10, and spring reset is sliding
Set 11, reset spring 12, spring internal protective cover 13, lower contact 14.
Specific embodiment
Bottom and top described in this example are the directions being subject in Fig. 1, and the right of Fig. 1 is bottom, and left is top
Portion.
In Fig. 1 ~ 11, a kind of releasing device, it include top connection 1, back-off connector 7, function sliding sleeve 5, lock claw lose first 8,
First 9 and lower contact 14 are lost in rotation；
Top connection 1 is threadedly coupled with back-off connector 7, and back-off connector 7 is lost first 8 with lock claw and is threadedly coupled, in back-off connector 7 and lock claw
It loses the interlayer between first 8 and is equipped with to rotate and lose first 9, be buckled to connector 7 and rotation is lost and connected in a manner of transmitting torque between first 9, revolve
Turn to lose first 9 bottom and be threadedly coupled with lower contact 14；
Function sliding sleeve 5 is slidably mounted on top connection 1, back-off connector 7 and lock claw and loses in first 8 cavity, in 5 He of function sliding sleeve
Shear pin 6 for locking axial displacement is equipped between top connection 1, the upper end of function sliding sleeve 5 be equipped with for steel ball 3 of giving up
The steel ball portions 51 for forming sealing are equipped with the reset spring 12 for resetting function sliding sleeve 5 in lower contact 14；
Lock claw loses first 8 and rotates the bulge-structure lost and be equipped with locking axial position mutually between first 9, and the bottom that lock claw loses first 8 is set
There are multiple lock claw 83, the bottom end of function sliding sleeve 5 is equipped with the lock claw protrusion 81 of limitation 83 radial contraction of lock claw, in function sliding sleeve 5
Portion is equipped with the annular groove 52 for accommodating lock claw 83.Thus structure can be put into steel ball of giving up at the top of releasing device, and infuse
Enter drilling fluid, cuts shear pin and lose first 9 and the disengagement of lower contact 14 with rotation, complete hydraulic releasing operation；Or it is giving up
After failure, make rotation lose first 9 from lower contact 14 to be detached from by rotating in the forward direction, completes machinery and give up operation.
Preferred scheme as shown in figure 1, is additionally provided with sealing drum 2 between top connection 1 and lower contact 14, and sealing drum 2 is located at upper
The outer wall of the outer wall of connector 1, top connection 1 is slidably connected by sealing structure with sealing drum 2, the bottom of sealing drum 2 and lower contact
14 screw threads or transition connection.Thus structure, convenient for the 2 each connection structure in inside of protection sealing drum.Preferably, lower contact 14 with it is close
The connection of 2 transition fit of sealed tube.
Preferred scheme as shown in figure 1, it is close to be equipped at least one between the inner wall of top connection 1 and the outer wall of function sliding sleeve 5
Seal 4.Preferably, the outer wall of function sliding sleeve 5 is arranged in sealing ring 4, and axially disposed sealing ring 4 is 4.Thus structure, really
The sealing effect of protection drilling fluid.
Preferred scheme such as Fig. 1, in 2, the shear pin 6 is circumferentially uniformly distributed.According to suitable shear pressure value,
Set the suitable parameter of shear pin 6.
Preferred scheme such as Fig. 1, in 7, it is equipped with interior limit stage 101 in the inner wall of top connection 1, with attributive function sliding sleeve 5
Top axial position；
It is equipped with sliding sleeve retention bead 71 in the inner wall of back-off connector 7, with the bottom axial position of attributive function sliding sleeve 5.Thus it ties
Structure slides function sliding sleeve 5 in suitable stroke range, and structure is more compact.
As shown in figure 1, the inner wall of lower contact 14 is threadedly coupled preferred scheme with spring internal protective cover 13, spring internal protective cover
Annular slide track is constituted between 13 and lower contact 14, spring reset sliding sleeve 11 and reset spring 12 are mounted in annular slide track, spring
The top of resetting sliding sleeve 11 is contacted with the bottom of function sliding sleeve 5, and the bottom of spring reset sliding sleeve 11 is contacted with reset spring 127.
Thus structure resets convenient for pushing function sliding sleeve 5.
As shown in figure 1, the inner and outer wall of spring reset sliding sleeve 11 is equipped with O-ring seals 10 to preferred scheme, so that bullet
Spring resetting sliding sleeve 11 and annular slide track, which are formed, to be tightly connected.Thus structure, can be avoided the failure of spring reset sliding sleeve 11, and raising is lost
The success rate of manual task.
As shown in figure 1, the bottom of top connection 1 is connect preferred scheme with the screw top of back-off connector 7.
Preferred scheme such as Fig. 1, in 3, the bottom of back-off connector 7 is equipped with multiple torque inserted sheets, loses first 9 top in rotation
Outer wall is equipped with multiple torque grooves 92, and torque inserted sheet is inserted in torque groove 92.Thus structure, convenient for passing through top connection 1, falling
Buckle joint 7 delivers torque to rotation and loses first 9, in order to ensure the success rate of mechanical operation of giving up.
When sliding sleeve protrusion 53 withstands lock claw 83, back-off connector 7, lock claw lose first 8 and rotation lose and match between first 9 for interference
It closes, to transmit torque.
As shown in figure 1, the inner wall that rotation loses first 9 is equipped with internal projection 91 to preferred scheme, and 83 outer wall of lock claw that lock claw loses first 8 is set
There is lock claw protrusion 81, internal projection 91 contacts with the side of lock claw protrusion 81 and formed interlocking, and lock claw protrusion 81 is located at internal projection 91
Lower section.
In preferred scheme, the side that internal projection 91 is contacted with lock claw protrusion 81 is inclined-plane；
The free end of lock claw 83 tends to shrink inwardly, so that internal projection 91 and lock claw protrusion 81 release axial lock.Thus it ties
Structure loses first 9 disengagement with rotation convenient for making lock claw lose first 8 under hydraulic pressure.
The top connection 1 of releasing device of the invention is connect by screw thread with upper part drilling rod, when give up operation, under
Enter to give up steel ball 3, and steel ball 3 of giving up rests on the steel ball portions 51 on 5 top of function sliding sleeve, and and steel ball under self gravitation effect
The arch steps of portions 51 cooperate, by top connection bore seal.After injecting drilling fluid, 1 internal pressure of top connection increases
Give up 5 axial downward movement of steel ball 3 and function sliding sleeve, after shear pin 6 is cut, function sliding sleeve 5 are pushed after to setting value
11 compression reseting spring 12 of bottom push the spring resetting sliding sleeve.Function sliding sleeve 5 is moved to and is buckled under fluid pressure effect
The sliding sleeve retention bead 71 of connector 7 is in contact, and the sliding sleeve protrusion 53 of function sliding sleeve 5 enters spring internal protective cover 13 and lower contact
Annular slide track between 14, lock claw lose first 8 lock claw 83, inside contract in the annular groove 52 for entering function sliding sleeve 5, lock claw protrusion
81 unclamp the locking to the internal projection 91 for losing first 9 is rotated, and the back-off connector 7 and lock claw of head and lower contact together with top are lost in rotation
It loses first 8 equal components to be detached from, completes operation of giving up.
When in top connection 1 fluid pressure progressively increase to still be unable to complete after setting value give up operation when, using machinery
It gives up operation scheme, the specific steps are as follows: top connection 1 connects top and is in charge of column, and lower end is connected by screw thread and back-off connector 7
Connect, the axial position of function sliding sleeve 5 be placed in top connection 1 and be buckled to connector 7 interior limit stage 101 and sliding sleeve retention bead 71 it
Between, rotation is lost to be connected by way of transmit torque between first 9 top and back-off connector 7, is rotated and is lost the bottom end of head and connect under
The annular inner wall of head is threadedly coupled, and rotates in the forward direction tubing string, makes top connection 1 that back-off connector 7 and lock claw be driven to lose first 8 and rotate forward,
When rotational torque, which is greater than rotation, loses the drag torque between first 9 and lower contact 14, rotation is lost first 9 and is detached from from lower contact 14,
Further lower contact 14 is in charge of column gravity due to lower part and is detached from from sealing drum 2 and 1 coupling part of top connection, loses to complete machinery
Manual task.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as limitation of the invention, this Shen
Please in embodiment and embodiment in feature in the absence of conflict, can mutual any combination.Protection model of the invention
The technical solution that should be recorded with claim is enclosed, the equivalent replacement side of technical characteristic in the technical solution recorded including claim
Case is protection scope.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.
Claims (10)
1. a kind of releasing device, it is characterized in that: it includes that top connection (1), back-off connector (7), function sliding sleeve (5), lock claw lose head
(8), head (9) and lower contact (14) are lost in rotation；
Top connection (1) is threadedly coupled with back-off connector (7), and back-off connector (7) is lost head (8) with lock claw and is threadedly coupled, and is connect in back-off
Head (7) and lock claw lose the interlayer between head (8) and are equipped with to rotate and lose head (9), are buckled to connector (7) and rotation is lost between head (9) to pass
The mode of torque delivery connects, and the bottom that head (9) is lost in rotation is threadedly coupled with lower contact (14)；
Function sliding sleeve (5) is slidably mounted on top connection (1), back-off connector (7) and lock claw and loses in the cavity of head (8), in function
It can be equipped with the shear pin (6) for locking axial displacement between sliding sleeve (5) and top connection (1), set in the upper end of function sliding sleeve (5)
There are the steel ball portions (51) for forming sealing with steel ball of giving up (3), is equipped in lower contact (14) for making function sliding sleeve (5)
The reset spring (12) of reset；
Lock claw loses head (8) and the bulge-structure that locking axial position mutually is equipped between head (9) is lost in rotation, and lock claw loses head (8)
Bottom is equipped with multiple lock claw (83), and the lock claw that the bottom end of function sliding sleeve (5) is equipped with limitation lock claw (83) radial contraction is raised (81),
The middle part of function sliding sleeve (5) is equipped with the annular groove (52) for accommodating lock claw (83).
2. a kind of releasing device according to claim 1, it is characterized in that: between top connection (1) and lower contact (14) also
Equipped with sealing drum (2), sealing drum (2) is located at the outer wall of top connection (1), and the outer wall of top connection (1) passes through sealing structure and sealing
Cylinder (2) is slidably connected, and the bottom of sealing drum (2) is connect with lower contact (14) screw thread or transition.
3. a kind of releasing device according to claim 1, it is characterized in that: inner wall and function sliding sleeve (5) in top connection (1)
Outer wall between be equipped at least one sealing ring (4).
4. a kind of releasing device according to claim 1, it is characterized in that: the shear pin (6) is circumferentially uniformly distributed.
5. a kind of releasing device according to claim 1, it is characterized in that: the inner wall in top connection (1) is equipped with interior limit rank
Platform (101), with the top axial position of attributive function sliding sleeve (5)；
Sliding sleeve retention bead (71) are equipped in the inner wall of back-off connector (7), with the bottom axial position of attributive function sliding sleeve (5).
6. a kind of releasing device according to claim 1, it is characterized in that: the inner wall of lower contact (14) and spring internal protective cover
(13) be threadedly coupled, constitute annular slide track between spring internal protective cover (13) and lower contact (14), spring reset sliding sleeve (11) and
Reset spring (12) is mounted in annular slide track, and the top of spring reset sliding sleeve (11) is contacted with the bottom of function sliding sleeve (5), bullet
The bottom of spring resetting sliding sleeve (11) is contacted with reset spring (127).
7. a kind of releasing device according to claim 5, it is characterized in that: the inner and outer wall of spring reset sliding sleeve (11) is equal
Equipped with O-ring seals (10), so that spring reset sliding sleeve (11) and annular slide track are formed and are tightly connected.
8. a kind of releasing device according to claim 1, it is characterized in that: the bottom of top connection (1) and back-off connector (7)
Screw top connection；
The bottom for being buckled to connector (7) is equipped with multiple torque inserted sheets, is equipped with multiple torque grooves in the top exterior walls that head (9) is lost in rotation
(92), torque inserted sheet is inserted in torque groove (92).
9. a kind of releasing device according to claim 1, it is characterized in that: the inner wall that head (9) is lost in rotation is equipped with internal projection
(91), lock claw (83) outer wall that lock claw loses head (8) is equipped with lock claw protrusion (81), the side of internal projection (91) and lock claw raised (81)
Interlocking is contacted and is formed, lock claw protrusion (81) is located at the lower section of internal projection (91).
10. a kind of releasing device according to claim 9, it is characterized in that: internal projection (91) is contacted with lock claw raised (81)
Side be inclined-plane；
The free end of lock claw (83) tends to shrink inwardly, so that internal projection (91) and lock claw raised (81) release axial lock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305699.7A CN109339725B (en) | 2018-11-05 | 2018-11-05 | Releasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305699.7A CN109339725B (en) | 2018-11-05 | 2018-11-05 | Releasing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109339725A true CN109339725A (en) | 2019-02-15 |
| CN109339725B CN109339725B (en) | 2021-11-02 |
Family
ID=65313663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811305699.7A Expired - Fee Related CN109339725B (en) | 2018-11-05 | 2018-11-05 | Releasing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109339725B (en) |
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| CN102966339A (en) * | 2012-12-09 | 2013-03-13 | 李运柱 | Insertion pipe type release separate-layer water injection string and operation process thereof |
| CN104196492A (en) * | 2014-08-26 | 2014-12-10 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Pressurized dragging down-hole blocking valve |
| CN204492719U (en) * | 2014-12-23 | 2015-07-22 | 中国石油化工股份有限公司 | A kind of ball-throwing type hydraulic pressure back-off is dual-purpose gives up |
| GB2536963A (en) * | 2015-03-31 | 2016-10-05 | Coiled Tubing Rental Tools Inc | In-well disconnect tool |
| CN204851091U (en) * | 2015-07-14 | 2015-12-09 | 中国石油天然气股份有限公司 | Releasing joint capable of transmitting torque |
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| CN109339725B (en) | 2021-11-02 |
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