CN104499979A - Method and device for salvaging fishes of different diameters without replacing slips - Google Patents
Method and device for salvaging fishes of different diameters without replacing slips Download PDFInfo
- Publication number
- CN104499979A CN104499979A CN201410832849.5A CN201410832849A CN104499979A CN 104499979 A CN104499979 A CN 104499979A CN 201410832849 A CN201410832849 A CN 201410832849A CN 104499979 A CN104499979 A CN 104499979A
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- China
- Prior art keywords
- slips
- fish
- movable
- bootstrap block
- different
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
Abstract
The invention discloses a method and a device for salvaging fishes of different diameters without replacing slips. The method adopts a group of movable slips evenly distributed along the circumference to salvage fishes; the movable slips evenly distributed along the circumference can synchronously, inwardly and radially move to reduce the salvage caliber of the slips or synchronously, outwardly and radially move to expand the salvage caliber of the slips in order to adapt to the requirements of fishes of different diameters. The invention can salvage all fishes of different diameters within a certain diameter range without replacing the slips, and broaden the applicable range of the slips. The structure of the device is simple, salvage is reliable, and the device can release fishes in a well. The device is particularly suitable for long-time downhole use and the salvage of pipe strings in unknown surface corrosion conditions. The drilling efficiency is greatly improved and the drilling cost is greatly reduced.
Description
Technical field
the present invention relates to a kind of method and the device of not changing slips salvaging different-diameter fish, belong to downhole tool technical field.
Background technology
in recent years, along with the development of petroleum and natural gas production technique, drilling depth is constantly deepened, and this just causes drilling failure more frequent and complicated.In oil, gas drilling and exploitation, generally use returnable slip overshot at present.
slips entangles smooth external diameter fish when salvaging, then the buttless thread being applied with lift power slips inner surface is just nipped fish deeply, also can abandoning rotating forward when salvaging unclamping fish.But the returnable slip overshot of prior art is because of the reason on its structural principle, and the slips of a specification is merely able to salvage the fish within the scope of large 2 millimeters of external diameter.Before salvaging fish, the slips of less than fish actual outside diameter 2 millimeters must be selected.This just causes during use and has the following disadvantages:
1. slips can only salvage the fish within the scope of large 2 millimeters, and therefore slips storage level is large, often occurs without corresponding specification slips, often needs to allot temporarily or purchase, delay the accident treatment duration.
2. drill the fishing of well, the actual outside diameter of fish can according to record and the anticipation of estimation drill rod abrasion amount of going into the well, go into the well as just adopted lead stamp (a kind of front end is the instrument of lead rod head) to accurate external diameter and make die to fish top, in lead stamp, indirect inspection goes out the actual outside diameter of fish.Lead stamp is measured fish external diameter and is required that fish is almost motionless and placed in the middle but this situation is few in accident well, and lead stamp measurements is inaccurate with unsuccessful in the majority.
3. according to record and the estimation drill rod abrasion amount anticipation fish actual outside diameter of going into the well, exist each root drilling rod or drill collar due to service time different with rock stratum, the empirical value of external diameter wear extent often has very large discrepancy, and slips of going into the well can not engaging fish, causes secondary or repeatedly fishing.
4., in producing well workover treatment, the tubing string in confused situation to down-hole Long-Time Service, surface corrosion cannot carry out fishing.
the generation of each situation above, all can have a strong impact on drilling efficiency, increases drilling cost.Therefore the existing salvaging mode of fish or not ideal enough, can not meet the needs that petroleum and natural gas exploitation is produced.
Summary of the invention
the object of the invention is to, thering is provided a kind of and do not change method and the device that slips salvages different-diameter fish, fishing can be carried out, to improve drilling efficiency to all diameter fish in certain limit without the need to changing slips, reduce drilling cost, thus overcome the deficiencies in the prior art.
technical scheme of the present invention is achieved in that
a kind of method not changing slips salvaging different-diameter fish of the present invention is that the movable slips that the method adopts a group to be uniformly distributed along the circumference carries out fish salvaging; The movable slips be uniformly distributed along the circumference can according to the diameter of fish synchronously radially movement reduce slips and salvage bore, or synchronous outward radial moves and expands slips and salvage bore; To adapt to the needs of different-diameter fish.
in preceding method, described movable slips upper end is that the radial T-slot on T connector structure and slips slide is slidably connected, and movable slips lower end inside is provided with buttless thread, fish clamping is held; Movable slips lower end outside is provided with dovetail boss, and dovetail boss is slidably connected with the dovetail groove on the taper slips bootstrap block be located in sleeve, to realize the adjustment of salvaging bore.
in preceding method, above described slips slide, be provided with pre-fastening spring, make the movable slips be uniformly distributed along the circumference always be in the clamped condition inwardly shunk by the downward thrust of pre-fastening spring.
in preceding method, below described movable slips, be provided with guide shoe, the salvaging mouth surrounded by fish top importing activity slips by guide shoe.
according to of the present invention a kind of device not changing slips salvaging different-diameter fish that said method is formed be, this device comprises cylindrical shell, cylindrical shell is uniformly distributed with slips bootstrap block along the circumference, the slips bootstrap block be uniformly distributed along the circumference surrounds up big and down small taper hole, and slips bootstrap block is connected with movable slips lower slide; Movable slips upper end radially slides with slips slide and is connected; Pre-fastening spring is provided with above slips slide.
in aforementioned means, described cylindrical shell is provided with the bootstrap block hole be uniformly distributed along the circumference, and described slips bootstrap block embeds bootstrap block eyelet welding and connects.
in aforementioned means, described slips bootstrap block is the strip shape body corresponding with bootstrap block hole shape on cylindrical shell, and the one side that slips bootstrap block is positioned at cylindrical shell is inclined-plane, and inclined-plane is provided with the dovetail groove parallel with inclined-plane.
in aforementioned means, the shape of described slips slide is short tube shape, and the bottom of short tube is provided with the radial T-slot be uniformly distributed along the circumference.
in aforementioned means, described movable slips lower end inside is provided with the buttless thread corresponding with downhole tool gas thread, is provided with the dovetail boss corresponding with slips bootstrap block outside movable slips lower end, and movable slips upper end is provided with T connector; T-slot on T connector and slips slide is slidably connected.
in aforementioned means, described cylindrical shell upper end is threaded with top connection, and cylindrical shell lower end is threaded with guide shoe.
owing to have employed technique scheme, compared with prior art, the present invention adopts one group of slips can salvage all fish of different-diameter within the scope of certain diameter, without the need to changing slips, improves the accommodation of slips in the present invention.Structure of the present invention is simple, grabs and drags for reliably, and can realize release fish in well.Be particularly suitable at down-hole Long-Time Service, the salvaging of surface corrosion tubing string in confused situation.Due to without the need to often changing slips, drilling efficiency and drilling cost are increased substantially.
Accompanying drawing explanation
fig. 1 is structural representation of the present invention;
fig. 2 is internal construction schematic diagram of the present invention;
fig. 3 is the structural representation of urceolus;
fig. 4 is the view of Fig. 2 other direction.
being labeled as in accompanying drawing: the movable slips of 1-cylindrical shell, 2-slips bootstrap block, 3-, 4-slips slide, the pre-fastening spring of 5-, 6-bootstrap block hole, 7-dovetail groove, 8-T type groove, 9-buttless thread, 10-dovetail boss, 11-T type head, 12-top connection, 13-guide shoe, 14-inclined-plane.
Detailed description of the invention
below in conjunction with drawings and Examples, the present invention is described in further detail, but not as any limitation of the invention.
a kind of method not changing slips salvaging different-diameter fish of the present invention is that as shown in figures 1-4, the movable slips that the method adopts a group to be uniformly distributed along the circumference carries out fish salvaging; The movable slips be uniformly distributed along the circumference can according to the diameter of fish synchronously radially movement reduce slips and salvage bore, or synchronous outward radial moves and expands slips and salvage bore; To adapt to the needs of different-diameter fish.Movable slips upper end is that T connector structure is slidably connected with the radial T-slot on slips slide, and movable slips lower end inside is provided with buttless thread, is clamped by fish and holds; Movable slips lower end outside is provided with dovetail boss, and dovetail boss is slidably connected with the dovetail groove on the taper slips bootstrap block be located in sleeve, to realize the adjustment of salvaging bore.Be provided with pre-fastening spring above slips slide, make the movable slips be uniformly distributed along the circumference always be in the clamped condition inwardly shunk by the downward thrust of pre-fastening spring.Guide shoe is provided with, the salvaging mouth surrounded by fish top importing activity slips by guide shoe below movable slips.
according to of the present invention a kind of device not changing slips salvaging different-diameter fish that said method is formed be, as shown in figures 1-4: this device comprises cylindrical shell 1, cylindrical shell 1 is uniformly distributed with slips bootstrap block 2 along the circumference, the slips bootstrap block 2 be uniformly distributed along the circumference surrounds up big and down small taper hole, and slips bootstrap block 2 is connected with movable slips 3 lower slide; Movable slips 3 upper end radially slides with slips slide 4 and is connected; Pre-fastening spring 5 is provided with above slips slide 4.Cylindrical shell 1 is provided with the bootstrap block hole 6 be uniformly distributed along the circumference, and described slips bootstrap block 2 embeds bootstrap block hole 6 and welds.Slips bootstrap block 2 is strip shape bodies corresponding with bootstrap block hole 6 shape on cylindrical shell 1, and the one side that slips bootstrap block 2 is positioned at cylindrical shell 1 is inclined-plane 14, and inclined-plane is provided with the dovetail groove 7 parallel with inclined-plane.The shape of slips slide 4 is short tube shape, and the bottom of short tube is provided with the radial T-slot 8 be uniformly distributed along the circumference.Movable slips 3 lower end inside is provided with the buttless thread 9 corresponding with downhole tool gas thread, and be provided with the dovetail boss 10 corresponding with slips bootstrap block 2 outside movable slips 3 lower end, movable slips 3 upper end is provided with T connector 11; T connector 11 is slidably connected with the T-slot 8 on slips slide 4.Cylindrical shell 1 upper end is threaded with top connection 12, and cylindrical shell 1 lower end is threaded with guide shoe 13.
Embodiment
this example is primarily of component composition (see accompanying drawing 1) such as top connection 12, cylindrical shell 1, guide shoe 13, pre-fastening spring 5, slips slide 4, movable slips 3.Top connection 12 is mainly used in being connected with drilling tool, and therefore top is provided with joint screw thread.
cylindrical shell 1 is the supporter of main parts size of the present invention, and shape is circular tube shaped, is evenly equipped with bootstrap block hole 6,6, four, four bootstrap block holes is step elongated hole along circular tube circumference direction, corresponding with the shape of slips bootstrap block 2.Be equipped with slips bootstrap block 2 in four bootstrap block holes 6, slips bootstrap block 2 welds with cylindrical shell 1.For inclined-plane 14(is shown in Fig. 4 inside slips bootstrap block 2), inclined-plane 14 is provided with the dovetail groove 7 be slidably matched with movable slips 3.Dovetail groove 7 is parallel with inclined-plane 14, when four movable slips 3 slide along dovetail groove 7 simultaneously, movable slips 3 also produces radial displacement, and radial variations occurs the circle that four movable slips 3 are surrounded, the radial direction of realization activity slips 3 is opened or is shunk, to adapt to the fishing of different-diameter fish.The effect of guide shoe 13 guides fish to enter cylindrical shell 1, can change difform guide shoe as required.Pre-fastening spring 5 provides the pre-clamping force to fish, ensures that four slips clamp simultaneously.The shape of slips slide 4 is short tube structure, the bottom of short tube is provided with four circumferentially evenly distributed T-slot 8, T connector 11 bottom movable slips 3 is slidably matched with T-slot 8, to ensure that movable slips 3 is moving radially freely, and makes four movable slips in axial synchronous operation.Movable slips 3 lower end inside is provided with buttless thread 9, makes to grab drag for more reliable and can realize release fish in well.Be provided with stop collar (not shown) in the cylindrical shell of pre-fastening spring 5 position, the effect of stop collar is the highest line journey of restriction slips slide 4, to prevent active card watts 3 from deviating from the dovetail groove of slips bootstrap block 2, or draws bad movable slips 3.
the course of work of the present invention and principle
the top connection 12 of apparatus of the present invention is connected with drilling tool, drives device of the present invention to rotate transfer by drilling tool.When the guide shoe 13 of device lower end runs into fish, by the guiding of guide shoe, fish is passed through in the cylindrical shell 1 of smooth access to plant.To prop up bottom movable slips 3 when continuing to transfer fish after fish enters cylindrical shell 1, promote four movable slips 3 to move up along the dovetail groove 7 of slips bootstrap block 2 simultaneously, movable slips 3 is in up process, bore becomes large gradually, until when movable slips 3 runs to identical with fish external diameter, fish top enters in the buttless thread 9 bottom movable slips 3, by the thrust that pre-fastening spring 5 is downward make four movable slips 3 tightly embrace fish.Then drilling tool is carried on, carry in the process of drilling tool upper, fish deadweight effect under to tenesmus, haul movable slips 3 descending, the inner circle changed into due to four movable slips 3 is the up big and down small conical surface, so the bearing down of fish is larger, the clamping force of movable slips 3 pairs of fish is also larger, to guarantee that fish can not come off.If too tight at downhole card of fish, when cannot pull out, rotating forward by drilling tool, drive this device synchronously to rotate forward, the spiral sawtoothed left-hand thread screw thread on movable slips is released as withdrawing nut, release fish, abandon salvaging, then continue again to salvage after taking bumper jar that fish is loosened.
Claims (10)
1. do not change the method that slips salvages different-diameter fish, it is characterized in that: the movable slips that the method adopts a group to be uniformly distributed along the circumference carries out fish salvaging; The movable slips be uniformly distributed along the circumference can according to the diameter of fish synchronously radially movement reduce slips and salvage bore, or synchronous outward radial moves and expands slips and salvage bore; To adapt to the needs of different-diameter fish.
2. do not change the method that slips salvages different-diameter fish according to claim 1, it is characterized in that: described movable slips upper end is that the radial T-slot on T connector structure and slips slide is slidably connected, movable slips lower end inside is provided with buttless thread, fish clamping is held; Movable slips lower end outside is provided with dovetail boss, and dovetail boss is slidably connected with the dovetail groove on the taper slips bootstrap block be located in sleeve, to realize the adjustment of salvaging bore.
3. do not change the method that slips salvages different-diameter fish according to claim 2, it is characterized in that: above described slips slide, be provided with pre-fastening spring, make the movable slips be uniformly distributed along the circumference always be in the clamped condition inwardly shunk by the downward thrust of pre-fastening spring.
4. do not change the method that slips salvages different-diameter fish according to claim 3, it is characterized in that: below described movable slips, be provided with guide shoe, salvaging mouth fish top importing activity slips surrounded by guide shoe.
5. do not change the device that slips salvages different-diameter fish for one kind, comprise cylindrical shell (1), it is characterized in that: on cylindrical shell (1), be uniformly distributed with slips bootstrap block (2) along the circumference, the slips bootstrap block (2) be uniformly distributed along the circumference surrounds up big and down small taper hole, and slips bootstrap block (2) is connected with movable slips (3) lower slide; Movable slips (3) upper end radially slides with slips slide (4) and is connected; Slips slide (4) top is provided with pre-fastening spring (5).
6. do not change the device that slips salvages different-diameter fish according to claim 5, it is characterized in that: described cylindrical shell (1) is provided with the bootstrap block hole (6) be uniformly distributed along the circumference, described slips bootstrap block (2) embeds bootstrap block hole (6) welding.
7. according to the device not changing slips salvaging different-diameter fish described in claim 6, it is characterized in that: described slips bootstrap block (2) is and cylindrical shell (1) strip shape body that above bootstrap block hole (6) shape is corresponding, the one side that slips bootstrap block (2) is positioned at cylindrical shell (1) is inclined-plane (14), and inclined-plane is provided with the dovetail groove (7) parallel with inclined-plane.
8. do not change the device that slips salvages different-diameter fish according to claim 7, it is characterized in that: the shape of described slips slide (4) is short tube shape, the bottom of short tube is provided with the radial T-slot (8) be uniformly distributed along the circumference.
9. do not change the device that slips salvages different-diameter fish according to claim 8, it is characterized in that: described movable slips (3) lower end inside is provided with the buttless thread (9) corresponding with downhole tool gas thread, be provided with the dovetail boss (10) corresponding with slips bootstrap block (2) outside movable slips (3) lower end, movable slips (3) upper end is provided with T connector (11); T connector (11) is slidably connected with the T-slot (8) on slips slide (4).
10. do not change the device that slips salvages different-diameter fish according to claim 5, it is characterized in that: described cylindrical shell (1) upper end is threaded with top connection (12), cylindrical shell (1) lower end is threaded with guide shoe (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832849.5A CN104499979B (en) | 2014-12-29 | 2014-12-29 | It is changed without the method and device that slips salvages different-diameter fish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832849.5A CN104499979B (en) | 2014-12-29 | 2014-12-29 | It is changed without the method and device that slips salvages different-diameter fish |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104499979A true CN104499979A (en) | 2015-04-08 |
| CN104499979B CN104499979B (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410832849.5A Active CN104499979B (en) | 2014-12-29 | 2014-12-29 | It is changed without the method and device that slips salvages different-diameter fish |
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| CN (1) | CN104499979B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499354A (en) * | 2016-03-14 | 2017-03-15 | 徐工集团工程机械股份有限公司 | Slip system and rig |
| CN107288567A (en) * | 2017-08-10 | 2017-10-24 | 贵州高峰石油机械股份有限公司 | A kind of reversible set milling fishing integrated device and its Refloatation method |
| CN109469458A (en) * | 2018-09-27 | 2019-03-15 | 核工业北京地质研究院 | A kind of circlip type fisher and its Refloatation method |
| CN111894565A (en) * | 2020-07-14 | 2020-11-06 | 中煤科工开采研究院有限公司 | Device for testing crack expansion in surrounding rock |
| CN115142806A (en) * | 2022-06-15 | 2022-10-04 | 淮安市井神钻采机具有限公司 | Electric drive's fish fishing device that falls |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB340292A (en) * | 1929-07-08 | 1931-01-08 | Doheny Stone Drill Co | Improvements in or relating to fishing tools for use in well drilling operations |
| CN2038950U (en) * | 1988-07-27 | 1989-06-07 | 大港石油管理局 | Fishing tube for column-shaped drop in well |
| CN201068762Y (en) * | 2007-08-16 | 2008-06-04 | 牡丹江石油工具有限责任公司 | Lift-placing type retreating large scope salvaging barrel |
| CN202055789U (en) * | 2011-05-17 | 2011-11-30 | 阜宁县石油机械有限公司 | High-performance sucker rod socket |
| CN203939473U (en) * | 2014-05-05 | 2014-11-12 | 辽河石油勘探局 | Three-jaw fisher |
| CN204402415U (en) * | 2014-12-29 | 2015-06-17 | 贵州高峰石油机械股份有限公司 | Do not change the device that slips salvages different-diameter fish |
-
2014
- 2014-12-29 CN CN201410832849.5A patent/CN104499979B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB340292A (en) * | 1929-07-08 | 1931-01-08 | Doheny Stone Drill Co | Improvements in or relating to fishing tools for use in well drilling operations |
| CN2038950U (en) * | 1988-07-27 | 1989-06-07 | 大港石油管理局 | Fishing tube for column-shaped drop in well |
| CN201068762Y (en) * | 2007-08-16 | 2008-06-04 | 牡丹江石油工具有限责任公司 | Lift-placing type retreating large scope salvaging barrel |
| CN202055789U (en) * | 2011-05-17 | 2011-11-30 | 阜宁县石油机械有限公司 | High-performance sucker rod socket |
| CN203939473U (en) * | 2014-05-05 | 2014-11-12 | 辽河石油勘探局 | Three-jaw fisher |
| CN204402415U (en) * | 2014-12-29 | 2015-06-17 | 贵州高峰石油机械股份有限公司 | Do not change the device that slips salvages different-diameter fish |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499354A (en) * | 2016-03-14 | 2017-03-15 | 徐工集团工程机械股份有限公司 | Slip system and rig |
| CN106499354B (en) * | 2016-03-14 | 2018-10-16 | 徐工集团工程机械股份有限公司 | Slip system and drilling machine |
| CN107288567A (en) * | 2017-08-10 | 2017-10-24 | 贵州高峰石油机械股份有限公司 | A kind of reversible set milling fishing integrated device and its Refloatation method |
| CN109469458A (en) * | 2018-09-27 | 2019-03-15 | 核工业北京地质研究院 | A kind of circlip type fisher and its Refloatation method |
| CN111894565A (en) * | 2020-07-14 | 2020-11-06 | 中煤科工开采研究院有限公司 | Device for testing crack expansion in surrounding rock |
| CN111894565B (en) * | 2020-07-14 | 2024-03-22 | 中煤科工开采研究院有限公司 | Device for testing crack expansion in surrounding rock |
| CN115142806A (en) * | 2022-06-15 | 2022-10-04 | 淮安市井神钻采机具有限公司 | Electric drive's fish fishing device that falls |
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| CN104499979B (en) | 2017-06-20 |
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