CN107916906A - A kind of handling can move back the fishing spear of back-off - Google Patents
A kind of handling can move back the fishing spear of back-off Download PDFInfo
- Publication number
- CN107916906A CN107916906A CN201711264862.5A CN201711264862A CN107916906A CN 107916906 A CN107916906 A CN 107916906A CN 201711264862 A CN201711264862 A CN 201711264862A CN 107916906 A CN107916906 A CN 107916906A
- Authority
- CN
- China
- Prior art keywords
- slip ring
- shaft
- connector
- dragging
- 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.)
- Pending
Links
- 238000009434 installation Methods 0.000 claims abstract description 7
- 230000001737 promoting effect Effects 0.000 claims abstract description 5
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 206010058109 Hangnail Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/20—Grappling tools, e.g. tongs or grabs gripping internally, e.g. fishing spears
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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)
- Marine Sciences & Fisheries (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention discloses the fishing spear that a kind of handling can move back back-off, including top connection, spring, connector, slip ring pin are promoted, slip ring, lance tooth is dragged for, drags for shaft；Top connection is a cylinder, there is the screw thread being threadedly coupled with tubing string bottom on top, there is and drags for the box thread that shaft connects in bottom, dragging on the outside of the middle part of shaft has two length, two Duan, tetra- axial trajectory grooves, the box thread of connector bottom is promoted to be connected with dragging for the male thread of lance tooth upper end, promoting inside connector has stepped hole, load slip ring on step, the symmetrical holes installation slip ring pin of slip ring circumference, slip ring pin is inserted in operation in the axial trajectory groove for dragging for shaft outer wall, the shoulder that top connection outer wall bottom is formed is with promoting two supporting surfaces of the shoulder of connector outer wall top formation as spring.The present invention enters inside cylindrical type tubing string to be implemented to salvage, and can be realized during salvaging and be carried, rotates, transferring the function of exiting.Tool focus has passage, it can be achieved that normal circulation well-flushing.
Description
Technical field
The present invention relates to a kind of downhole tool of oil field development application, especially a kind of handling can move back the fishing spear of back-off.
Background technology
Current fishing spear cannot satisfaction property at the same time in the case where salvaging, be buckled to, exit, many requirements such as use in well repeatedly
Energy.Especially in horizontal well overhaul fishing, moment of torsion cannot be transmitted normally, effective moment of torsion can not be delivered to junk.Very
Extremely cannot normally it be exited when exiting instrument in the case of needing rotary tools.Easily cause secondary accident.
The content of the invention
The technical problem to be solved by the invention is to provide the fishing spear that a kind of handling can move back back-off, using the teaching of the invention it is possible to provide from circle
Enter inside column type tubing string and implement to salvage, can be realized during salvaging and carry, rotate, transferring the function of exiting.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of handling can move back the fishing spear of back-off,
Including top connection, spring, connector, slip ring pin are promoted, slip ring, drag for lance tooth, drag for shaft；Top connection is a cylinder, top have with
There are and drag for the box thread that shaft connects in the screw thread that tubing string bottom is threadedly coupled, bottom, and dragging for has two length two short on the outside of the middle part of shaft
Four axial trajectory grooves, promote the box thread of connector bottom to be connected with dragging for the male thread of lance tooth upper end, have inside promotion connector
Stepped hole, slip ring is loaded on step, the symmetrical holes installation slip ring pin of slip ring circumference, slip ring pin, which is inserted in, drags for shaft outer wall
Operation in axial trajectory groove, the shoulder that the shoulder that top connection outer wall bottom is formed is formed with promotion connector outer wall top is as spring
Two supporting surfaces.
The top connection radially has screw hole, and for installing anti-back pin, shaft is dragged in fixation.
The lance tooth that drags for integrally divides valve type for circumference quarter, and four teeth are inserted into the keyway for dragging for shaft respectively, are realized
Axial operation.
The beneficial effects of the invention are as follows：There is passage at the fishing spear center of the present invention, it can be achieved that normal circulation well-flushing.Ensure to apply
Work safety, it is applied widely, it is particularly suitable for horizontal well, high angle hole salvages construction.
Brief description of the drawings
Fig. 1 is the structure diagram for the fishing spear that handling of the present invention can move back back-off.
Fig. 2 is the structure diagram for dragging for shaft for the fishing spear that handling of the present invention can move back back-off.
In figure：1st, top connection；2nd, anti-back pin；3rd, spring；4th, connector is promoted；5th, slip ring pin；6th, slip ring；7th, lance is dragged for
Tooth；8th, shaft is dragged for.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
As shown in Figure 1, 2, handling of the invention can move back the fishing spear of back-off, including top connection 1, spring 3, promote connector 4,
Slip ring pin 5, slip ring 6, drag for lance tooth 7, drag for shaft 8；Top connection 1 is a cylinder, and there is the spiral shell being threadedly coupled with tubing string bottom on top
There are and drag for the box thread that shaft 8 connects in line, bottom, and dragging on the outside of the middle part of shaft 8 has two length, two Duan, tetra- axial trajectory grooves, pushes away
The box thread of dynamic 4 bottom of connector is connected with dragging for the male thread of 7 upper end of lance tooth, and promoting inside connector 4 has stepped hole, loads on step
Slip ring 6, the symmetrical holes installation slip ring pin 5 of 6 circumference of slip ring, slip ring pin 5 is inserted in the axial trajectory groove for dragging for 8 outer wall of shaft
Operation, the shoulder that 1 outer wall bottom of top connection is formed is with promoting two branch of the shoulder of 4 outer wall top of connector formation as spring 3
Support face.
1 radial direction of top connection has screw hole, and for installing anti-back pin 2, shaft 8 is dragged in fixation.
The lance tooth 7 that drags for integrally divides valve type for circumference quarter, and four teeth are inserted into four keyways for dragging for shaft 8 respectively
It is interior, it is possible to achieve axial operation.
It is described to drag for the raised axial bond 8-1 of 8 Shang You of shaft tetra-, dragged for when realizing back-off operation lance tooth 7 in keyway 8-2 by
Limit protection, will not turn round and badly drag for lance tooth, have four synchronous keyway 8-4 between raised key 8-3, in conical surface uplink, drag for lance tooth and exist
Outer crowded state is constantly in during the lifting active force for dragging for junk, dragging for 8 bottom of shaft has guide cone 8-5, has behind guide cone
Water-carrying groove 8-6, entirely dragging for has the through hole 8-7 for realizing well-flushing circulation in shaft 8.
Drag for axial the two of 8 top of shaft and grow operation passage of the two short keyways as slip ring pin, formed continuously in circumference
Closed loop.The axial bond of lower part is that protection drags for lance tooth 7 and implements the effect of back-off.The guide cone of lower end is beneficial to this instrument to introduce
Junk inner cavity.The hydrophthalmia for dragging for 8 center of shaft is easy to establish the passage of circulation well cleanup.Drag for lance tooth 7 and divide valve type, four flutings to be overall
Effect be beneficial to installation and conveniently drag for lance tooth elasticity open and shrink.The tooth of four flutings can be subject to when reversing at the same time
Drag for the protection of 8 axial bond of shaft.The interior scalene cone of lower end increases salvaging size when dragging for 8 uplink and downlink of shaft beneficial to lance tooth 7 is dragged for.On
Reduced during row and salvage size 8-8.
Top connection 1 connects tubing string and drags for shaft, the shoulder righting of lower end and gives spring 3 to transmit pressure.Promote 4 top of connector
Shoulder righting and give spring 3 transmit pressure.Stepped hole installation slip ring 6 inside lower end.The symmetrical holes installation of 6 circumference of slip ring
Slip ring pin 5.Anti-back pin 2 is used to withstand to drag for shaft 8, anti-retaining button.Slip ring pin 5 is installed on the endoporus on 6 circumference of slip ring
Place.
What the present invention was realized in：Top connection 1 first carries out following assembling with dragging for before shaft 8 is connected：Shaft 8 is dragged for fill successively
It is connected after entering to drag for lance tooth 7, slip ring 6, slip ring pin 5, promotion connector 4, spring 3 with top connection 1；Finally load anti-back pin 2.On
1 upper end of connector connection drilling tool can go into the well use.
The handling of tubing string tail band can move back back-off fishing spear tripping in desired depth and be salvaged from the inner cavity of junk, by dragging for lance tooth
Hangnail hold the inner wall of junk, the more draw the more tight in the case where dragging for the support of shaft scalene cone, just as dragging for lance and junk one.Need to revolve
When turning fishing tool implementation back-off, ensure that dragging for lance tooth normally transmits torque to junk, makes by the protection for dragging for shaft axial bond
Junk synchronous rotary.In the case that not revolvable situation and junk cannot be suggested, drilling tool is transferred, slip ring pin is dragging for shaft
Under the limitation of short track, make to drag for the constraint that shaft scalene cone is dragged in the thorough disengaging of lance tooth, can bounce back and subtract in free elastic stage
The small outside diameter for dragging for lance tooth departs from the inner wall of junk.Final Safe withdrawing is salvaged, and ensures that fishing string normally rises.
The present invention is particularly suitable in well tubing string by card for back-off operation is frequently salvaged in downhole remedial operation construction
Seriously；It is more suitable in the salvaging construction of horizontal well, high angle hole.During fishing, instrument, which cannot normally rotate, to move back
Go out, since casing programme is complicated, the situation that moment of torsion cannot be transmitted normally.Such a situation easily causes the complication of accident.It is a kind of
Securely and reliably, can in well Reusability special instrument of going into the well.
Component, structure and the process that the present embodiment does not describe in detail belong to the well-known components of the industry and common knot
Structure or conventional process method, are not describing one by one here.
In conclusion present disclosure is not limited in the above embodiments, the knowledgeable people in same area can
Can propose other embodiments easily within the technological guidance's thought of the present invention, but this embodiment is included in this hair
Within the scope of bright.
Claims (3)
1. a kind of handling can move back the fishing spear of back-off, it is characterised in that including top connection (1), spring (3), promote connector (4),
Slip ring pin (5), slip ring (6), drag for lance tooth (7), drag for shaft (8)；Top connection (1) is a cylinder, and top has and tubing string bottom spiral shell
There are and drag for the box thread that shaft (8) connects in the screw thread of line connection, bottom, and drag for have two length two short on the outside of the middle part of shaft (8) four
Road axial trajectory groove, promotes the box thread of connector (4) bottom to be connected with dragging for the male thread of lance tooth (7) upper end, promotes in connector (4)
There is stepped hole in portion, and slip ring (6), the symmetrical holes installation slip ring pin (5) of slip ring (6) circumference, slip ring pin (5) are loaded on step
Operation in the axial trajectory groove for dragging for shaft (8) outer wall is inserted in, the shoulder that top connection (1) outer wall bottom is formed is with promoting connector (4)
Two supporting surfaces of the shoulder that outer wall top is formed as spring (3).
2. the fishing spear of back-off can be moved back according to claim 1 by putting, it is characterised in that the top connection (1) radially has screw
Hole, for installing anti-back pin (2), shaft (8) is dragged in fixation.
3. the fishing spear of back-off can be moved back according to claim 1 by putting, it is characterised in that the lance tooth (7) that drags for is circumference four etc.
Part is overall to divide valve type, and four teeth are inserted into the keyway for dragging for shaft (8) respectively, realizes axial operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711264862.5A CN107916906A (en) | 2017-12-05 | 2017-12-05 | A kind of handling can move back the fishing spear of back-off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711264862.5A CN107916906A (en) | 2017-12-05 | 2017-12-05 | A kind of handling can move back the fishing spear of back-off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107916906A true CN107916906A (en) | 2018-04-17 |
Family
ID=61898354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711264862.5A Pending CN107916906A (en) | 2017-12-05 | 2017-12-05 | A kind of handling can move back the fishing spear of back-off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107916906A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049592A (en) * | 2020-10-20 | 2020-12-08 | 中国石油集团渤海钻探工程有限公司 | Returnable slip type casing tieback make-up connector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110048739A1 (en) * | 2009-08-27 | 2011-03-03 | Baker Hughes Incorporated | Methods and apparatus for manipulating and driving casing |
| CN202157775U (en) * | 2011-07-25 | 2012-03-07 | 中国石油天然气股份有限公司 | Lifting-placing type returnable double-slider fishing spear |
| WO2014018642A1 (en) * | 2012-07-24 | 2014-01-30 | Smith International, Inc. | System and method of cutting and removing casings from wellbore |
| CN203822232U (en) * | 2014-03-10 | 2014-09-10 | 中国石油化工股份有限公司 | Withdrawable fishing spear with milling function |
| CN204386537U (en) * | 2014-12-31 | 2015-06-10 | 大港油田集团有限责任公司 | A kind of reversible drags for lance |
| CN204920878U (en) * | 2015-10-08 | 2015-12-30 | 西南石油大学 | Dedicated formula split that moves back of coupling drags for lance |
-
2017
- 2017-12-05 CN CN201711264862.5A patent/CN107916906A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110048739A1 (en) * | 2009-08-27 | 2011-03-03 | Baker Hughes Incorporated | Methods and apparatus for manipulating and driving casing |
| CN202157775U (en) * | 2011-07-25 | 2012-03-07 | 中国石油天然气股份有限公司 | Lifting-placing type returnable double-slider fishing spear |
| WO2014018642A1 (en) * | 2012-07-24 | 2014-01-30 | Smith International, Inc. | System and method of cutting and removing casings from wellbore |
| CN203822232U (en) * | 2014-03-10 | 2014-09-10 | 中国石油化工股份有限公司 | Withdrawable fishing spear with milling function |
| CN204386537U (en) * | 2014-12-31 | 2015-06-10 | 大港油田集团有限责任公司 | A kind of reversible drags for lance |
| CN204920878U (en) * | 2015-10-08 | 2015-12-30 | 西南石油大学 | Dedicated formula split that moves back of coupling drags for lance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112049592A (en) * | 2020-10-20 | 2020-12-08 | 中国石油集团渤海钻探工程有限公司 | Returnable slip type casing tieback make-up connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180417 |
|
| RJ01 | Rejection of invention patent application after publication |