CN106869847A - A kind of underground right-hand thread drilling tool Refloatation method and the back-off joint for being used - Google Patents
A kind of underground right-hand thread drilling tool Refloatation method and the back-off joint for being used Download PDFInfo
- Publication number
- CN106869847A CN106869847A CN201510912207.0A CN201510912207A CN106869847A CN 106869847 A CN106869847 A CN 106869847A CN 201510912207 A CN201510912207 A CN 201510912207A CN 106869847 A CN106869847 A CN 106869847A
- Authority
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- China
- Prior art keywords
- joint
- drilling tool
- hand thread
- eccentric pin
- pin bush
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 21
- 241001397809 Hakea leucoptera Species 0.000 claims abstract description 34
- 230000033001 locomotion Effects 0.000 claims abstract description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000001012 protector 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
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/043—Threaded with locking means
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Marine Sciences & Fisheries (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of underground right-hand thread drilling tool Refloatation method and the back-off joint for being used, one end of described back-off joint is provided with internal thread, the other end is put after eccentric pin bush by circlip block on back-off joint, motion inclined-plane is provided with the interface of eccentric pin bush and back-off joint, retaining ledge is provided with motion inclined-plane, while being provided with the external screw thread of same pitch on the outer wall of back-off joint and eccentric pin bush.The present invention can directly carry out fishing without left-hand thread drilling tool, the time needed for reducing process accident, greatly simplify incident processing procedure, reduce break down time, save drilling cost；And without above carrying the back-off joint of i.e. achievable back-off operation, solve and tonnage is lifted in horizontal well operations due to cannot accurately be acted on the technical problem on salvaged instrument by wall friction, improve fishing success ratio.
Description
Technical field
The present invention relates to a kind of underground right-hand thread drilling tool Refloatation method and the back-off joint for being used, belong to downhole tool fishing operation field.
Background technology
With continuing to develop for petroleum and natural gas production technique, drilling depth is constantly deepened, this result in drilling failure more frequently and complicate.At present, occur drilling rod underground lock of tool drilling in drilling process, jarring releasing is all carried out using bumper jar, if jarring cannot unfreezing, general use back-off rear enclosure milling unfreezing., it is necessary to special left-hand thread drilling tool in back-off operation, and a whole set of left-hand thread drilling tool is not that each drilling crew can lay at any time, can only typically be allocated when zero.The time is thus greatly wasted, drilling cost is increased, and it is also possible to occur second accident during wait, resulted in greater loss.
Original reversing tool, such as left hand fishing spear, after salvaging fish, a pulling force for above carrying is must provide for, back-off operation then can be just carried out, this salvaging mode has no problem in straight well operation, but in extended reach well and horizontal well operations, due to being influenceed by wall friction, lifting tonnage cannot be acted on accurately on instrument, cause that back-off operation cannot be completed.In addition, most reversing tool, grab and drag for back-off part and have hardness slip element high, if back-off fails, hardness slip element high necessarily stays in TOF, be follow-up salvage or back-off operation increases difficulty.
The content of the invention
The present invention provides a kind of simple to operate, fishing success ratio underground right-hand thread drilling tool Refloatation method high and the back-off joint for being used, fishing is directly carried out by so as to realize without left-hand thread drilling tool, time needed for reducing process accident, greatly simplify incident processing procedure, break down time is reduced, drilling cost is saved.
Technical scheme：A kind of underground right-hand thread drilling tool Refloatation method,A back-off joint docked with right-hand thread drilling tool is made first,The front end of described back-off joint is provided with an eccentric pin bush,The motion inclined-plane with retaining ledge is provided with the interface of eccentric pin bush and back-off joint,The external screw thread being connected with right-hand thread drilling tool is machined with the outer wall of back-off joint and eccentric pin bush simultaneously,Before right-hand thread drilling tool is salvaged,Back-off joint is fixed on work drill string bottom,And each connection screw thread on work drill string is tightened with maximum recommendation moment of torsion,When the drill string that works is gone into the well encounters salvaged right-hand thread drilling tool,Rotate forward work drill string,It is relatively unrotatable due to the retaining ledge limitation between back-off joint and eccentric pin bush,So as to the back-off joint of the drill string bottom that works is screwed into right-hand thread drilling tool,Now reversely rotate work drill string,Back-off joint is set to be relatively rotated along inclined-plane is moved with eccentric pin bush,Due to there is eccentric throw between back-off joint and eccentric pin bush,Back-off joint mutually staggers with the external screw thread on eccentric pin bush outer wall when applying reactive torque,So as to salvaged right-hand thread drilling tool is pinned into connection at once；Continue to invert and open the connection screw thread of back-off joint bottom, so just can above carry the right-hand thread drilling tool that work drill string will open and go out from underground.
In the above-mentioned methods, the maximum recommended moment of torsion of work drill string is rotated forward more than the peak torque for reversely rotating work drill string.
A kind of back-off joint for above-mentioned underground right-hand thread drilling tool Refloatation method, one end of described back-off joint is provided with internal thread, the other end is put after eccentric pin bush by circlip block on back-off joint, motion inclined-plane is provided with the interface of eccentric pin bush and back-off joint, retaining ledge is provided with motion inclined-plane, while being provided with the external screw thread of same pitch on the outer wall of back-off joint and eccentric pin bush.
Further, it is additionally provided with the solution lockhole vertical with back-off connector center line on motion inclined-plane.
Described internal thread and external screw thread is taper thread.
Eccentric distance e on described eccentric pin bush is 1~3mm.
Due to using above-mentioned technical proposal, the advantage of the invention is that：
1st, the present invention can directly carry out fishing without left-hand thread drilling tool, the time needed for reducing process accident, greatly simplify incident processing procedure, reduce break down time, save drilling cost；
2nd, Refloatation method of the invention is capable of achieving the back-off joint of back-off operation without above carrying, and solves and tonnage is lifted in horizontal well operations due to cannot accurately be acted on the technical problem on salvaged instrument by wall friction, improves fishing success ratio；
3rd, back-off joint of the invention is not only simple in structure, easy to make, and back-off part is exactly generic connectivity screw thread, it is not necessary to special protection equipment, it is only necessary to common thread protector, is easy to protect, transport and store；
4th, without hardness slip element high on back-off joint of the invention, even if back-off fails, will not also be salvaged or back-off operation increase difficulty for follow-up；
5th, back-off joint of the invention can be used as common crossover sub, and universality is higher.
Brief description of the drawings
Fig. 1 is the structural representation of back-off joint in the present invention；
Fig. 2 is the A-A sectional views of Fig. 1；
Fig. 3 is the B-B sectional views of Fig. 1；
Fig. 4 is the deployed configuration schematic diagram on motion inclined-plane in the present invention.
Description of reference numerals：1- internal threads, 2- back-off joints, 3- eccentric pin bush, 4- circlips, 5- external screw threads, 6- motions inclined-plane, 7- retaining ledges, 8- solution lockholes.
Specific embodiment
In order that the object of the invention, technical scheme and advantage are clearer, the present invention is described in further detail with reference to the accompanying drawings and examples.
Embodiments of the invention：A kind of structural representation of the back-off joint salvaged for underground right-hand thread drilling tool is as shown in Figures 1 and 2, one end of described back-off joint 2 is provided with internal thread 1, the other end passes through the block of circlip 4 on back-off joint 2 after putting eccentric pin bush 3, and the eccentric distance e on described eccentric pin bush 3 is 1~3mm；Motion inclined-plane 6 is provided with the interface of eccentric pin bush 3 and back-off joint 2, referring to Fig. 4, retaining ledge 7 is provided with motion inclined-plane 6, while being provided with the external screw thread 5 of same pitch on the outer wall of back-off joint 2 and eccentric pin bush 3.Referring to Fig. 3, the solution lockhole 8 with the central axis of back-off joint 2 is additionally provided with motion inclined-plane 6.Described internal thread 1 and external screw thread 5 is taper thread, so just using the guide effect of taper thread, improves docking efficiency.
Before right-hand thread drilling tool is salvaged, it is connected with work drill string bottom by the internal thread 1 on back-off joint 2 first, and each connection screw thread on work drill string is tightened with maximum recommendation moment of torsion, when the drill string that works is gone into the well encounters salvaged right-hand thread drilling tool, rotate forward work drill string, it is relatively unrotatable because the retaining ledge 7 between back-off joint 2 and eccentric pin bush 3 is limited, so as to the back-off joint 2 of the drill string bottom that works is screwed into right-hand thread drilling tool, now reversely rotate work drill string, back-off joint 2 is set to be relatively rotated along inclined-plane 6 is moved with eccentric pin bush 3, due to there is eccentric throw between back-off joint 2 and eccentric pin bush 3, back-off joint 2 mutually staggers with the external screw thread 5 on the outer wall of eccentric pin bush 3 when applying reactive torque, so as to salvaged right-hand thread drilling tool is pinned into connection at once；Continue to invert and open the connection screw thread of the bottom of back-off joint 2, so just can above carry the right-hand thread drilling tool that work drill string will open and go out from underground.In said process, the maximum recommended moment of torsion for rotating forward work drill string need to be more than the peak torque for reversely rotating work drill string, so be for prevent work drill string reversely rotate when from work drill string inside open, wherein maximum recommended moment of torsion can according to work drill string model and specification from《Drilling tool handbook》On check in.
After right-hand thread drilling tool is salvaged, first back-off joint 2 is unloaded from work drill string, solution lockhole 8 is found out on back-off joint 2, then by a polished rod insertion solution lockhole 8, so that back-off joint 2 cannot be relatively rotated with guide 3 in reversion, back-off joint 2 is now reversely rotated, the right-hand thread drilling tool for getting up just can will be so salvaged and be dismantled from back-off joint 2.
Claims (6)
1. a kind of underground right-hand thread drilling tool Refloatation method, it is characterised in that：A back-off joint docked with right-hand thread drilling tool is made first,The front end of described back-off joint is provided with an eccentric pin bush,The motion inclined-plane with retaining ledge is provided with the interface of eccentric pin bush and back-off joint,The external screw thread being connected with right-hand thread drilling tool is machined with the outer wall of back-off joint and eccentric pin bush simultaneously,Before right-hand thread drilling tool is salvaged,Back-off joint is fixed on work drill string bottom,And each connection screw thread on work drill string is tightened with maximum recommendation moment of torsion,When the drill string that works is gone into the well encounters salvaged right-hand thread drilling tool,Rotate forward work drill string,It is relatively unrotatable due to the retaining ledge limitation between back-off joint and eccentric pin bush,So as to the back-off joint of the drill string bottom that works is screwed into right-hand thread drilling tool,Now reversely rotate work drill string,Back-off joint is set to be relatively rotated along inclined-plane is moved with eccentric pin bush,Due to there is eccentric throw between back-off joint and eccentric pin bush,Back-off joint mutually staggers with the external screw thread on eccentric pin bush outer wall when applying reactive torque,So as to salvaged right-hand thread drilling tool is pinned into connection at once；Continue to invert and open the connection screw thread of back-off joint bottom, so just can above carry the right-hand thread drilling tool that work drill string will open and go out from underground.
2. right-hand thread drilling tool Refloatation method in underground according to claim 1, it is characterised in that：The maximum moment of torsion of recommending for rotating forward work drill string is more than the peak torque for reversely rotating work drill string.
3. the back-off joint of a kind of underground right-hand thread drilling tool Refloatation method for described in claim 1 or 2, it is characterised in that：Described back-off joint（2）One end be provided with internal thread（1）, the other end puts eccentric pin bush（3）Pass through circlip afterwards（4）Block is in back-off joint（2）On, in eccentric pin bush（3）With back-off joint（2）Interface on be provided with motion inclined-plane（6）, on motion inclined-plane（6）On be provided with retaining ledge（7）, while in back-off joint（2）And eccentric pin bush（3）Outer wall on be provided with the external screw thread of same pitch（5）.
4. the back-off joint salvaged for underground right-hand thread drilling tool according to claim 3, it is characterised in that：On motion inclined-plane（6）On be additionally provided with and back-off joint（2）The solution lockhole of central axis（8）.
5. the back-off joint salvaged for underground right-hand thread drilling tool according to claim 3, it is characterised in that：Described internal thread（1）And external screw thread（5）It is taper thread.
6. the back-off joint salvaged for underground right-hand thread drilling tool according to claim 3, it is characterised in that：Described eccentric pin bush（3）On eccentric distance e be 1~3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912207.0A CN106869847A (en) | 2015-12-11 | 2015-12-11 | A kind of underground right-hand thread drilling tool Refloatation method and the back-off joint for being used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912207.0A CN106869847A (en) | 2015-12-11 | 2015-12-11 | A kind of underground right-hand thread drilling tool Refloatation method and the back-off joint for being used |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106869847A true CN106869847A (en) | 2017-06-20 |
Family
ID=59236978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510912207.0A Pending CN106869847A (en) | 2015-12-11 | 2015-12-11 | A kind of underground right-hand thread drilling tool Refloatation method and the back-off joint for being used |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106869847A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605414A (en) * | 2017-11-02 | 2018-01-19 | 北京泰利新能源科技发展有限公司 | A kind of back-off joint |
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Application publication date: 20170620 |