CN108825157A - A kind of novel packer back-off sub - Google Patents
A kind of novel packer back-off sub Download PDFInfo
- Publication number
- CN108825157A CN108825157A CN201810969075.9A CN201810969075A CN108825157A CN 108825157 A CN108825157 A CN 108825157A CN 201810969075 A CN201810969075 A CN 201810969075A CN 108825157 A CN108825157 A CN 108825157A
- Authority
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- China
- Prior art keywords
- mandrel
- sleeve
- shear pin
- catch jacket
- cased
- 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.)
- Pending
Links
- 210000000078 claw Anatomy 0.000 claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 28
- 238000013461 design Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004873 anchoring Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 210000000664 rectum Anatomy 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
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
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)
- Piles And Underground Anchors (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of novel packer back-off subs, including top connection, bearing cap, intermediate sleeve, outer sleeve, mandrel, lower contact, return plug in shear pin, shear pin I, elastic card claw, catch jacket and tail sleeve, top connection lower end is connect with mandrel upper end by intermediate sleeve, the lower end in contact of intermediate set upper side and bearing cap, mandrel is cased with tail sleeve outside lower end, lower contact is cased with catch jacket outside upper end, the outside of top connection multi-diameter shaft is cased with bearing cap, there is steel ball in the junction of top connection and bearing cap, mandrel exterior is cased with elastic card claw, catch jacket is cased with outside elastic card claw, catch jacket is connect by shear pin I with mandrel, elastic card claw is connect by returning plug in shear pin with mandrel, outer sleeve is cased with outside intermediate sleeve.The beneficial effects of the invention are as follows：It does not need to look for the point of neutralization, it is only necessary to push certain tonnage, rotating forward tubing string can be realized easily back-off and give up, and can be used for mechanical packer and hydraulic packer.
Description
Technical field
The present invention relates to oil production equipment field, especially a kind of novel packer back-off sub.
Background technique
In oil recovery process, packer is that one kind is fixed on tubing string, by packer set sealing oil jacket annulus with
Realize the device of layering.
According to site technique demand, a mating back-off sub is all generally needed on packer top, is also referred to as inserted into close
Envelope, anchoring sealing etc., after the completion of operation, packer top tubing string has needed, by certain mode, back-off sub and packing
Device realize separation, needed replacing after followed by giving up successfully tubing string return again again it is slotting, the mode of giving up be generally divided into mechanically and liquid
Pressure type.Mechanically give up operate when, generally require to find the tubing string point of neutralization and be buckled to, it is right in some deep-wells, high angle hole
The operation at scene requires very high, especially enters well time tubing string remote, gives up more difficult；Fluid pressure type is given up and is often needed
Ball is put into build the pressure and realize, but ball seat will affect latus rectum in pipe again.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology, provides one kind and does not need to look for the point of neutralization, it is only necessary to push
Certain tonnage rotates forward tubing string easily back-off can be realized and give up, can be used for the novel of mechanical packer and hydraulic packer
Packer back-off sub.
The purpose of the present invention is achieved through the following technical solutions：A kind of novel packer back-off sub, including top connection,
Bearing cap, intermediate sleeve, outer sleeve, mandrel, lower contact, return plug in shear pin, shear pin I, elastic card claw, catch jacket and tail sleeve, it is described on
Connector lower end is connect with mandrel upper end by intermediate sleeve, is cased with tail sleeve outside the mandrel lower end, outside the lower contact upper end
It is cased with catch jacket, the outside of the top connection multi-diameter shaft is cased with bearing cap, the lower end in contact of the intermediate set upper side and bearing cap,
There is steel ball in the junction of the top connection and bearing cap, and the mandrel exterior is cased with elastic card claw, the elastic card claw outer cover
There is catch jacket, the catch jacket is connect by shear pin I with mandrel, and the elastic card claw is connect by returning plug in shear pin with mandrel, institute
It states and is cased with outer sleeve outside intermediate sleeve.
Preferably, the tail sleeve is to be threadedly coupled with mandrel lower end, in the intermediate sleeve and top connection lower end and mandrel
End is to be threadedly coupled, and the lower contact is to be threadedly coupled with catch jacket, and the outer sleeve is to be threadedly coupled with bearing cap.
Preferably, the mandrel and catch jacket are sealed by list V support ring and double V sealing rings, the list V support ring position
Installation in multiple double V sealing rings both ends, double V sealing rings is symmetrical about O-ring seal II.
Preferably, the intermediate sleeve is sealed with top connection lower end and mandrel upper end by O-ring seal I, the lower contact
It is sealed with catch jacket by O-ring seal III.
Preferably, the intermediate sleeve is fixed by fixing screws and mandrel, and the outer sleeve passes through fixing screws and axis
It holds lid to fix, the lower contact is fixed by fixing screws and catch jacket.
Preferably, the steel ball has multiple and is evenly distributed at the circumference that top connection is connected with bearing.
Preferably, the catch jacket and elastic card claw are ratchet designs.
Preferably, the connector axial direction the maximum tensile strength is 1.5*105Kg, maximum differential pressure:70MPa is suitable for 5 "
Above packer.
Preferably, described to return plug in shear pin and have three and be evenly distributed on elastic card claw surrounding, the shear pin I have three and
It is evenly distributed on catch jacket surrounding.
The present invention has the following advantages that：
1, floating type anchoring claw, it is ensured that when back-off, claw does not stress, and realizes easily back-off；
2, the design bearing on top ensures that driving torque is small, realizes easily back-off；
3, the design of the ratchet of catch jacket and elastic card claw ensures to be inserted into reliable, is anchored firm；
4, protective case can prevent sundries from entering screw thread；
5, tool leakproofness is ensured using combination sealing mode；
6, it is suitable for most of hydraulic packers and mechanical packer；
7, dedicated salvaging screw thread lower contact.
Detailed description of the invention
Fig. 1 is the cross-sectional view of structure of the invention；
Fig. 2 is the B-B view of structure of the invention；
Fig. 3 is the C-C view of structure of the invention；
Fig. 4 is the usage state diagram of structure of the invention；
In figure, 1- top connection, 2- steel ball, 3- bearing cap, 4- fixing screws, 5- outer sleeve, 6-O type sealing ring I, 7- intermediate sleeve,
8- mandrel, 9- return plug in shear pin, 10- elastic card claw, 11- catch jacket, the mono- V support ring of 12-, the bis- V sealing rings of 13-, the sealing of 14-O type
Enclose II, 15- tail sleeve, 16-O type sealing ring III, 17- lower contact, 20- shear pin I.
Specific embodiment
It is of the invention to reach the technical means and efficacy that the beneficial purpose of scheduled invention is taken further to illustrate,
Below in conjunction with attached drawing and preferred embodiment, to specific embodiment, structure, feature and its effect applied according to the present invention, in detail
It describes in detail bright as after.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily the same embodiment, this
Outside, special characteristic, structure or the feature in one or more embodiments can have any suitable form to combine：
As shown in Figure 1, a kind of novel packer back-off sub, it is characterised in that：Including top connection 1, bearing cap 3, intermediate sleeve 7,
Outer sleeve 5, mandrel 8, lower contact 17, return plug in shear pin 9, shear pin I20, elastic card claw 10, catch jacket 11 and tail sleeve 15, it is described on connect
First 1 lower end and 8 upper end of mandrel are connect by intermediate sleeve 7, are cased with tail sleeve 15 outside 8 lower end of mandrel, in the lower contact 17
End is external to be cased with catch jacket 11, and the outside of 1 multi-diameter shaft of top connection is cased with bearing cap 3,7 upper end of intermediate sleeve and bearing cap
There is a steel ball 2 in the junction of 3 lower end in contact, the top connection 1 and bearing cap 3, the flexible claw 10 of 8 outer cover of mandrel,
Catch jacket 11 is cased with outside the elastic card claw 10, the catch jacket 11 is connect by shear pin I20 with mandrel 8, the elastic card
Pawl 10 is connect by returning plug in shear pin 9 with mandrel 8, is cased with outer sleeve 5 outside the intermediate sleeve 7.
As optional embodiment, the tail sleeve is to be threadedly coupled with mandrel lower end, the intermediate sleeve and top connection 1
Lower end and 8 upper end of mandrel are interference fits, and the lower contact 17 is to be threadedly coupled with catch jacket 11, the outer sleeve 5 and bearing
Lid 3 is to be threadedly coupled.
As optional embodiment, the mandrel 8 and catch jacket 11 pass through list V support ring 12 and double V sealing rings 13
Sealing, the list V support ring 12 are located at multiple double 13 both ends of V sealing ring, and the installation of double V sealing rings 13 is about O-shaped sealing
It is symmetrical to enclose II14.
As optional embodiment, the intermediate sleeve 7 passes through O-ring seal I6 with 1 lower end of top connection and 8 upper end of mandrel
Sealing, the lower contact 17 are sealed with catch jacket 11 by O-ring seal III16.
As optional embodiment, the intermediate sleeve 5 is fixed by fixing screws 4 and mandrel 8, the outer sleeve 5
Fixed by fixing screws 4 and bearing cap 3, the lower contact 17 is fixed by fixing screws 4 and catch jacket 11.
As optional embodiment, the steel ball 2 has 100 and is evenly distributed on the connection of top connection 1 and bearing cap 3
Place.
As optional embodiment, the catch jacket 11 and elastic card claw 10 are ratchet designs.
As optional embodiment, the connector axial direction the maximum tensile strength is 1.5*105Kg, maximum differential pressure:
70MPa is suitable for 5 " or more packer.
As optional embodiment, the plug in shear pin 9 that returns has three and is evenly distributed on 10 surrounding of elastic card claw, institute
Stating shear pin I20 has three and is evenly distributed on 11 surrounding of catch jacket.
Specific embodiment 1：As shown in Figure 1, back-off sub and packer are connected on the ground before entering well, the packing
Device is mechanical set packer, installs shear pin I20, after keeping mandrel 8 and catch jacket 11 relatively fixed, by back-off sub and envelope
Send every device, under be sent to after position, base sealed packer, rotate tubing string, due to the effect of shear pin I20,8 meeting of mandrel and claw
Set 11, elastic card claw 10 rotate together, and when rotating the circle number of base sealed packer and reaching the circle number of requirement, slowly push, make tubing string
In pressured state, tolerance range of the tonnage no more than shear pin I20 is pushed, checks whether packer slip blocks, is such as insulated
After device slip spider is stablized, continue to push tubing string, shear pin I20 will be cut, and base sealed packer is simultaneously closed off, and be given up when needing to be buckled to
When, pushing tubing string makes 5 lower end surface of outer sleeve and 11 upper end face contact of catch jacket, and 5 upper surface of outer sleeve is connect with bearing cap 3, just
Tube column, 10 spiral of elastic card claw, until screw thread all screws out, realization is given up, and during tubing string pushes, pressure begins
It is acted on the bearing that steel ball 2 and bearing cap 3 are formed eventually；When needing tieback, plug in shear pin 9 is installed back, elastic card claw 10 is made
Relatively fixed with mandrel 8, during returning the insertion of plug in shear pin 9, sealing element initially enters sealing hole, is then anchored slips slowly
Insertion, after sealing element and elastic card claw 10 are entirely insertable in place, 5 lower end surface of outer sleeve and 11 upper surface of catch jacket be also at this time
There is a certain distance, there are a certain distance in tail sleeve 15 and 17 upper surface of lower contact, and continue pressurization decentralization, plug in shear pin 9 will be cut back,
5 lower end surface of outer sleeve is bonded with 11 upper surface of catch jacket, and anchoring claw is separated with mandrel 8 at this time, it is ensured that when next time, back-off was given up,
Anchoring claw is in free state.
Specific embodiment 2：As shown in figure 4, back-off sub and packer are connected on the ground before entering well, the packing
Device is hydraulic base sealed packer, and back-off sub send with packer, under be sent to after position, base sealed packer, pushing makes
Tubing string is in pressured state, and 5 lower end surface of outer sleeve is bonded with 11 upper surface of catch jacket at this time, prevents sundries in well from entering screw thread company
Place is met, is given up when needing to be buckled to, pushing tubing string makes 5 lower end surface of outer sleeve and 11 upper end face contact of catch jacket, 5 upper surface of outer sleeve
It is connect with bearing cap 3, rotates forward tubing string, 10 spiral of elastic card claw, until screw thread all screws out, realization is given up, under tubing string
It presses in rotation process, pressure is acted on always on steel ball 2 and bearing cap 3, and anchoring claw is realized not by pressure or pulling force at this time
Easily back-off；When needing tieback, plug in shear pin 9 is installed back, keeps elastic card claw 10 and mandrel 8 relatively fixed, is returning plug in shear pin 9
During insertion, sealing element initially enters sealing hole, and slips is anchored after spy and is slowly inserted into, when sealing element and elastic card claw 10 are complete
After portion is inserted in place, there are also a certain distance, tail sleeve 15 and lower contacts with 11 upper surface of catch jacket for 5 lower end surface of outer sleeve at this time
There are a certain distance in 17 upper surfaces, continue pressurization decentralization, will cut go back to plug in shear pin 9,5 lower end surface of outer sleeve and 11 upper end of catch jacket
Face paste is closed, and anchoring claw is separated with mandrel 8 at this time, it is ensured that when next time, back-off was given up, anchoring claw is in free state.
The above, only presently preferred embodiments of the present invention not do limitation in any form to the present invention.It is any ripe
Those skilled in the art is known, without departing from the scope of the technical proposal of the invention, all using technology contents described above
Many possible changes and modifications or equivalent example modified to equivalent change are made to technical solution of the present invention.Therefore, all
It is the content without departing from technical solution of the present invention, any change modification made to the above embodiment of technology according to the present invention,
Equivalent variations and modification belong to the protection scope of the technical program.
Claims (9)
1. a kind of novel packer back-off sub, it is characterised in that：Including top connection（1）, steel ball（2）, bearing cap（3）, it is intermediate
Set（7）, outer sleeve（5）, mandrel（8）, lower contact（17）, return plug in shear pin（9）, shear pin I（20）, elastic card claw（10）, catch jacket
（11）And tail sleeve（15）, the top connection（1）Lower end and mandrel（8）Upper end passes through intermediate sleeve（7）Connection, the mandrel（8）Under
End is external to be cased with tail sleeve（15）, the lower contact（17）Catch jacket is cased with outside upper end（11）, the top connection（1）Multi-diameter shaft
Outside is cased with bearing cap（3）, the intermediate sleeve（7）Upper end and bearing cap（3）Lower end in contact, the top connection（1）With bearing
Lid（3）Junction have steel ball（2）, the mandrel（8）The flexible claw of outer cover（10）, the elastic card claw（10）Outer cover
There is catch jacket（11）, the catch jacket（11）Pass through shear pin I（20）With mandrel（8）Connection, the elastic card claw（10）By returning
Plug in shear pin（9）With mandrel（8）Connection, the intermediate sleeve（7）Outside is cased with outer sleeve（5）.
2. a kind of novel packer back-off sub according to claim 1, it is characterised in that：Under the tail sleeve and mandrel
End is to be threadedly coupled, the intermediate sleeve and top connection（1）Lower end and mandrel（8）Upper end is to be threadedly coupled, the lower contact（17）
With catch jacket（11）It is to be threadedly coupled, the outer sleeve（5）With bearing cap（3）It is to be threadedly coupled.
3. a kind of novel packer back-off sub according to claim 1, it is characterised in that：The mandrel（8）With card
Pawl set（11）Pass through single V support ring（12）With double V sealing rings（13）Sealing, the list V support ring（12）It is sealed positioned at multiple double V
Ring（13）Both ends, double V sealing rings（13）Installation about O-ring seal II（14）Symmetrically.
4. a kind of novel packer back-off sub according to claim 1, it is characterised in that：The intermediate sleeve（7）With it is upper
Connector（1）Lower end and mandrel（8）Upper end passes through O-ring seal I（6）Sealing, the lower contact（17）With catch jacket（11）Pass through O
Type sealing ring III（16）Sealing.
5. a kind of novel packer back-off sub according to claim 1, it is characterised in that：The intermediate sleeve（7）It is logical
Cross fixing screws（4）With mandrel（8）It is fixed, the outer sleeve（5）Pass through fixing screws（4）With bearing cap（3）It is fixed, under described
Connector（17）Pass through fixing screws（4）With catch jacket（11）It is fixed.
6. a kind of novel packer back-off sub according to claim 1, it is characterised in that：The steel ball（2）Have multiple
And it is evenly distributed on top connection（1）And bearing cap（3）At the circumference of connection.
7. a kind of novel packer back-off sub according to claim 1, it is characterised in that：The catch jacket（11）With
Elastic card claw（10）It is ratchet design.
8. a kind of novel packer back-off sub according to claim 1, it is characterised in that：The connector is axial maximum
Tensile strength is 1.5*105Kg, maximum differential pressure:70MPa is suitable for 5 " or more packer.
9. a kind of novel packer back-off sub according to claim 1, it is characterised in that：Described returns plug in shear pin（9）
There are three and is evenly distributed on elastic card claw（10）Surrounding, the shear pin I（20）There are three and is evenly distributed on catch jacket（11）
Surrounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810969075.9A CN108825157A (en) | 2018-08-23 | 2018-08-23 | A kind of novel packer back-off sub |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810969075.9A CN108825157A (en) | 2018-08-23 | 2018-08-23 | A kind of novel packer back-off sub |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108825157A true CN108825157A (en) | 2018-11-16 |
Family
ID=64150597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810969075.9A Pending CN108825157A (en) | 2018-08-23 | 2018-08-23 | A kind of novel packer back-off sub |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108825157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852367A (en) * | 2020-08-05 | 2020-10-30 | 中石化石油工程技术服务有限公司 | Intubation type releasing joint and using method thereof |
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| GB2321919A (en) * | 1997-01-24 | 1998-08-12 | Baker Hughes Inc | Indicating dog sub for weight-set packers |
| GB0418035D0 (en) * | 2003-09-11 | 2004-09-15 | Halliburton Energy Serv Inc | Hydraulic setting tool for packers |
| CN201078206Y (en) * | 2007-08-31 | 2008-06-25 | 新疆石油管理局钻井工艺研究院 | Mechanical and hydraulic pressure double-acting releasing tool |
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| CN205743795U (en) * | 2016-07-06 | 2016-11-30 | 荆州市赛瑞能源技术有限公司 | A kind of double acting is given up hydraulic setting tool |
| CN106545306A (en) * | 2016-10-28 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of machine liquid one dropper |
| CN206205836U (en) * | 2016-11-09 | 2017-05-31 | 胜利油田石油开发中心有限公司 | Packer both sides' formula releasing gadget |
| CN108019157A (en) * | 2016-10-28 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Back-off sub |
| CN208633796U (en) * | 2018-08-23 | 2019-03-22 | 成都西部石油装备股份有限公司 | A kind of novel packer back-off sub |
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2018
- 2018-08-23 CN CN201810969075.9A patent/CN108825157A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB924231A (en) * | 1960-03-14 | 1963-04-24 | Baker Oil Tools Inc | Mechanically set well packer |
| GB2321919A (en) * | 1997-01-24 | 1998-08-12 | Baker Hughes Inc | Indicating dog sub for weight-set packers |
| GB0418035D0 (en) * | 2003-09-11 | 2004-09-15 | Halliburton Energy Serv Inc | Hydraulic setting tool for packers |
| CN201078206Y (en) * | 2007-08-31 | 2008-06-25 | 新疆石油管理局钻井工艺研究院 | Mechanical and hydraulic pressure double-acting releasing tool |
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| CA2805470A1 (en) * | 2012-02-27 | 2013-08-27 | Donald R. Greenlee | Hydrostatic setting tool |
| CN202866673U (en) * | 2012-10-28 | 2013-04-10 | 大庆泰泽机械加工有限公司 | Clamping claw type release connector |
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| CN106150414A (en) * | 2016-06-30 | 2016-11-23 | 西南石油大学 | A kind of mechanical and hydraulic double-acting rotary liner hanger of anti-slips retraction |
| CN205743795U (en) * | 2016-07-06 | 2016-11-30 | 荆州市赛瑞能源技术有限公司 | A kind of double acting is given up hydraulic setting tool |
| CN106545306A (en) * | 2016-10-28 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of machine liquid one dropper |
| CN108019157A (en) * | 2016-10-28 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Back-off sub |
| CN206205836U (en) * | 2016-11-09 | 2017-05-31 | 胜利油田石油开发中心有限公司 | Packer both sides' formula releasing gadget |
| CN208633796U (en) * | 2018-08-23 | 2019-03-22 | 成都西部石油装备股份有限公司 | A kind of novel packer back-off sub |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852367A (en) * | 2020-08-05 | 2020-10-30 | 中石化石油工程技术服务有限公司 | Intubation type releasing joint and using method thereof |
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