CN104314501A - Sliding block type fishing cylinder - Google Patents
Sliding block type fishing cylinder Download PDFInfo
- Publication number
- CN104314501A CN104314501A CN201410539074.2A CN201410539074A CN104314501A CN 104314501 A CN104314501 A CN 104314501A CN 201410539074 A CN201410539074 A CN 201410539074A CN 104314501 A CN104314501 A CN 104314501A
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- sidewall
- block type
- slide block
- wall
- top connection
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- 238000010276 construction Methods 0.000 claims description 3
- 241000251468 Actinopterygii Species 0.000 abstract description 48
- 230000001788 irregular Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 206010061688 Barotrauma Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000004576 sand Substances 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
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
Abstract
The invention discloses a sliding block type fishing cylinder and relates to the technical field of oil and gas underground work. The problem that the existing fishing tool cannot fish small sundries and irregular sundries is solved. The technical scheme is that the sliding block type fishing cylinder comprises an upper joint, an outer cylinder connected with the upper joint, as well as a fixed sliding block and a movable sliding block which are arranged in the outer cylinder, wherein the fixed sliding block comprises a first side wall fixed with the inner wall of the outer cylinder and a second side wall which is slope-shaped, the second side wall comprises a first end close to the upper joint and a second end far away from the upper joint, the shortest distance between the first end and the first side wall is smaller than the shortest distance between the second end and the second side wall, and the movable sliding block comprises a third side wall matched with the second side wall on the fixed sliding block and enabling the movable sliding block to slide along the second side wall and a fourth side wall capable of being attached to the inner wall of the outer cylinder. The sliding block type fishing cylinder is mainly used for fishing the relatively small and irregular-shaped sundries.
Description
Technical field
The present invention relates to oil, gas well underground work technical field, particularly relate to a kind of slide block type dipper.
Background technology
In oil, gas well operation, along with the prolongation of activity duration, the fish (as the metal species after cover milling, boring the cement fragment after filling in, corrosion tubing string chip, formation sand production etc.) remaining in shaft bottom will affect normal operation, therefore need, in the workover treatment in later stage, fish be salvaged out.
Prior art usually adopts die nipple, drags for lance and fishing socket process fish trouble.Die nipple, drag for lance mainly for the fish having larger hydrophthalmia, enough to ensure the fishing tool intensity into well, even if otherwise engaging fish, also frangibility.Fishing socket is roughly divided into reversible fishing socket and slip socket, and the overwhelming majority is only applicable to the reinforcement can salvaging smooth post, body, tool joint and other cylindrical fish within the scope of given size.
Inventor finds that the limiting structure more complicated of above-mentioned fishing tool, operation are more loaded down with trivial details, and fish less for size, in irregular shape is difficult to salvage.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of slide block type dipper, and main purpose is to provide the simple slide block type fish of a kind of structure, and meet little fish, irregular fish is salvaged, and improves and salvages efficiency.
For achieving the above object, the present invention mainly provides following technical scheme:
Embodiments of the invention provide a kind of slide block type dipper, comprising: top connection, urceolus, fixed slider and movable slider; Wherein,
One end of described urceolus connects described top connection, and the other end is set to unenclosed construction;
Described fixed slider comprises the first side wall fixed with outer tube inner wall and the second sidewall in an inclined-plane do not fitted with described outer tube inner wall; Wherein, described second sidewall comprises near the first end of described top connection and the second end away from described top connection, and the beeline between described first end and described the first side wall is less than the beeline between described second end and described the first side wall;
Described movable slider has and to match with the second sidewall of described fixed slider and described movable slider can be made along the 3rd sidewall of described second side walls, and the 4th sidewall that can fit with described outer tube inner wall;
Wherein, wherein, the beeline between one end of the close described top connection of described 3rd sidewall and described 4th sidewall is greater than the beeline between the second end of described second sidewall and described 4th sidewall.
Aforesaid slide block type dipper, described 4th sidewall is provided with salvaging tooth.
Aforesaid slide block type dipper, described outer tube inner wall is provided with limited step; The first side wall of described fixed slider is provided with the fixed station abutted against with described limited step; One end and the described top connection of the close described top connection of described fixed slider abut against.
Aforesaid slide block type dipper, described fixed slider also has the 5th sidewall in inclined-plane, and described 5th sidewall has first end and the second end; Wherein,
The first end of described 5th sidewall connects the second end of described second sidewall, and the second end of described 5th sidewall connects one end away from described top connection of described the first side wall;
Opening between the first end of described 5th sidewall and outer tube inner wall is less than the opening between the second end of described 5th sidewall and outer tube inner wall.
Aforesaid slide block type dipper, described movable slider also has the 6th sidewall; One end of described 6th sidewall connects one end away from described top connection of described movable slider the 3rd sidewall; The other end of described 6th sidewall connects one end away from described top connection of described movable slider the 4th sidewall.
Wherein, the space between described 6th sidewall one end and outer tube inner wall is greater than the space between the described 6th sidewall other end and outer tube inner wall.
Aforesaid slide block type dipper, the 5th sidewall of described fixed slider is identical with angle with the incline direction of the 6th sidewall of described movable slider.
Aforesaid slide block type dipper, the other end of described urceolus is set to guide shoe mouth.
Aforesaid slide block type dipper, described top connection is female joint, and one end plug-in mounting of described female joint enters in described urceolus, and is fixed by fixed screw and described urceolus.
Aforesaid slide block type dipper, described female joint is inner hollow, both ends open structure, and described female joint is communicated with the inside of described urceolus.
Aforesaid slide block type dipper, in the form of a ring, and described outer tube inner wall is provided with one week limited step to described limited step.
By technique scheme, embodiment of the present invention slide block type dipper at least has following advantages:
The structure of the slide block type dipper of the embodiment of the present invention is simple, and it mainly comprises top connection, urceolus, movable slider and fixed slider, is realized the connection of slide block type dipper and lift instrument by top connection; By the cooperation between fixed slider, movable slider, outer tube inner wall, just can realize down-hole fish can enter in the gap of movable slider and outer tube inner wall automatically, thus realizes salvaging that is less to down-hole size and irregular fish.
Further, movable slider in the embodiment of the present invention is also provided with salvaging tooth, to ensure that fish can be stuck between movable slider and outer tube inner wall more closely, thus guarantee the unlikely landing of fish in upper process of moving of the slide block type dipper of the present embodiment, improve and salvage efficiency and intensity.
The slide block type dipper that the embodiment of the present invention provides can realize salvaging, exit, circulation of drilling fluid operation, can solve the fishing operation problem of jagged, the damaged and substantial deviation borehole axis of fish, can play a significant role in oilfield salvage operation; Can meet little junk, irregular junk is salvaged, simple to operate, greatly reduces duty cycle and cost, improves and produces efficiency.
Accompanying drawing explanation
The structural representation of a kind of slide block type dipper that Fig. 1 provides for the embodiment of the present invention;
The part-structure schematic diagram of the salvaging tooth of the slide block type dipper that Fig. 2 provides for the embodiment of the present invention;
The outer tube structure schematic diagram of the slide block type dipper that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to according to the detailed description of the invention of the present patent application, structure, feature and effect thereof, be described in detail as follows.In the following description, the not necessarily same embodiment that different " embodiment " or " embodiment " refers to.In addition, special characteristic, structure or feature in one or more embodiment can be combined by any suitable form.
As shown in Figure 1, a kind of slide block type dipper that one embodiment of the present of invention propose, comprising: top connection 1, urceolus 2, fixed slider 3 and movable slider 4.Wherein, one end of urceolus 2 connects top connection 1, and the other end is unenclosed construction.Fixed slider 3, movable slider 4 are arranged in urceolus 2.Fixed slider 3 comprises the first side wall 31 fixing with urceolus 2 inwall, and the second sidewall 32 in an inclined-plane do not fitted with urceolus 2 inwall, and described second sidewall 32 comprises near the first end of top connection 1 and the second end away from top connection 1, between the first end of described second sidewall 32 and the first side wall 31, beeline is less than the beeline between the second end of the second sidewall 32 and the first side wall 31.Movable slider 4 comprise match with the second sidewall 32 on fixed slider 3 and the 3rd sidewall 41 that movable slider 4 slides along the second sidewall 32 can be made, and the 4th sidewall 42 that can fit with the inwall of urceolus 2, and the beeline of one end of the close top connection of the 3rd sidewall 41 and the 4th sidewall 42 is greater than the second end of the second sidewall 32 and the beeline of the 4th sidewall 42, to guarantee that movable slider 4 is stuck in urceolus 2 by fixed slider 3, coming off of anti-stop slider 4.
Top connection in use, lifts with sleeve pipe or other and is connected by the slide block type dipper that the present embodiment provides, and to facilitate the slide block type dipper of the present embodiment to enter in oil, gas well, and fixed slider 3 and movable slider 4 is arranged in urceolus 2.During use, along with the moving down of slide block dipper of the present embodiment, fish is by movable slider 4 upwards jack-up, along with moving up of movable slider 4, between movable slider 4 and urceolus 2 inwall, there is a space increased gradually along with above moving, fish moves in the space between movable slider 4 and urceolus 2 inwall, subsequently to the slide block dipper of upper lift the present embodiment, movable slider 4 Action of Gravity Field glides under gravity, thus the gap reduced between movable slider and outer tube inner wall, thus by fish tightly be stuck between movable slider 4 and urceolus 2 inwall, achieve the salvaging of fish, this salvaging mode can realize size less, the salvaging of fish in irregular shape, and it is simple to operate, can greatly reduce duty cycle and cost, thus enhance productivity.
Preferably, another embodiment of the present invention provides a kind of slide block type dipper, can be stuck between movable slider 4 and urceolus 2 inwall more closely to make fish, ensure that the slide block type dipper of the present embodiment moves past the unlikely landing of fish in journey upper, as shown in Figure 2, the slide block type dipper in the present embodiment is arranged on the 4th sidewall 42 of movable slider 4 salvages tooth 421.On carry in process, salvage tooth 421 little fish or irregular fish are tightly blocked, thus make the slide block type fishing success ratio in the present embodiment higher, better effects if, and making slide block type salvage, to have tensile strength high, it is large to salvage fish size range, can realize salvaging, exit, circulation of drilling fluid operation, the fishing operation problem of jagged, the damaged and substantial deviation borehole axis of fish can be solved, can play a significant role in oilfield salvage operation.
Preferably, as shown in Figure 3, in order to make movable slider 4 and fixed slider 3 moving and realizing multidirectional salvaging in dipper, meet diverse location and salvage demand, another embodiment of the present invention provides a kind of slide block dipper, compared with above-described embodiment, urceolus 2 inwall in the present embodiment is provided with limited step 5, the first side wall 31 is provided with the fixed station 6 abutted against with limited step 5, one end of the close top connection of fixed slider 3 and the lower surface of top connection 1 abut against.Because the first side wall 31 of fixed slider 3 fits tightly with urceolus 2 inwall, its surface texture coordinates with urceolus 2 inwall, the rotation of circumference can be carried out along urceolus 2 inwall, by the combination of the 3rd sidewall 41 of the second sidewall 32 and movable slider 4, drive movable slider 4 to rotate in urceolus 2 inwall simultaneously, in the position that fish enters not when the position of applicable salvaging, by fish to the active force bottom fixed slider 3 and bottom movable slider 4, realize the circumferential displacement of movable slider 4 and fixed slider 3, thus make fish enter into the position being applicable to salvaging, namely be positioned at below movable slider 4, salvaging can be completed.
In order to better meet the salvaging demand of diverse location, realize the smooth salvaging of fish, another embodiment of the present invention provides a kind of slide block type dipper, compared with above-described embodiment, fixed slider 3 also has the 5th sidewall 33 in inclined-plane, described 5th sidewall 33 has first end and the second end, and the first end of the 5th sidewall connects the second end of the second sidewall 32, and the second end of the 5th sidewall connects one end away from described top connection of the first side wall 31; Opening between the first end of the 5th sidewall and urceolus 2 inwall is less than the opening between the second end of the 5th sidewall 33 and urceolus 2 inwall, and described 5th sidewall 33 is positioned at the below of the first side wall 31.The object of this design is, when the fish of the slide block type dipper lower end of the present embodiment is in fixed slider 3 lower end, although the circumference that the above embodiments can realize fixed slider 3 by the active force of fish to fixed slider 3 moves, but but cannot show the accurate control in the circumferential displacement of fixed slider 3 and direction, ensure that fish enters more rapidly and can salvage district, being obliquely installed by the 5th sidewall 33 in the present embodiment, fish can directly move to below movable slider 4 along the inclined-plane tilted, the circumference that fish active force upwards can make fixed slider 3 carry out certain distance simultaneously moves, thus make fish be positioned at immediately below movable slider 4, reduce the technical difficulty of salvaging, add operability, reduce the salvaging time.
Preferably, another embodiment of the present invention provides a kind of slide block type dipper, and compared with above-described embodiment, the movable slider 4 in the present embodiment also has one end away from top connection 1 of one end connection movable slider 4 the 3rd sidewall 41 of the 6th sidewall the 43, six sidewall 43; The other end of the 6th sidewall 43 connects one end away from top connection 1 of movable slider the 4th sidewall 42.Space between one end of 6th sidewall 43 and urceolus 2 inwall is less than the space between the 6th sidewall 43 other end and urceolus 2 inwall, and the 6th sidewall 43 is positioned at the below of described 4th sidewall 42.Be that fish enters into after below movable slider 4 by the object so designed, along with the 6th sidewall on movable slider 4 can enter the gap between movable slider 4 and urceolus 2 inwall smoothly, the time of salvaging is shorter, better effects if.
Preferably, the inclined-plane of fixed slider the 5th sidewall 33 is identical with angle with the incline direction on the inclined-plane of movable slider the 6th sidewall 43.The incline direction on the inclined-plane of the 5th sidewall 33 is identical with angle, the velocity of displacement of fish and stressed size is made to maintain a metastable state, avoid and that produce wearing and tearing excessive or too small to the local pressure of fixed slider 3 or movable slider 4, be conducive to the application life extending fixed slider 3 and movable slider 4.
Preferably, for the ease of salvaging, fish is made more easily to enter in urceolus 2, guide shoe mouth 7 is set in urceolus 2 lower end, simultaneously, for ensureing carrying out smoothly of fishing, increase the tensile strength of slide block type dipper in the present embodiment, described top connection 1 is female joint, and female joint lower end plug-in mounting or the mode that is threaded connection are screwed in urceolus 2, and by fixed screw 8, both are fastening at the two outer wall connected, preferably adopt four M10 hold-down screws can realize the safety and stability that it salvages process.Female joint 1 is the both ends open structure of the inner hollow being communicated with urceolus 2 inside.
Preferably, the limited step 5 in above-described embodiment arranges one week in the form of a ring on urceolus 2 inwall.Avoid the air in urceolus 2 to discharge and produce effects of air pressure fish and normally salvage, arranging the limited step 5 of a week simultaneously, make the moving range of fixed slider 3 and movable slider 4 larger, fishing more easily carries out.And cost is low, easy to process, series processing can be carried out according to sleeve pipe model; In addition, its structure is simple, and salvaging process is not easy to occur lock of tool drilling; Compared with other congenerous fishing tools, drag for that to obtain junk success rate high.
The slide block type dipper that embodiments of the invention provide, mounting means is as follows: now fixed slider is placed in outer barrel, the fixed station of fixed slider is coordinated with the limited step in urceolus install, then movable slider is put into, 3rd sidewall of movable slider is coordinated with the second sidewall of fixed slider, namely the inclined-plane on movable slider and the bevel inclination angle on fixed slider match, and whether check between movable slider and fixed slider can relative sliding, movable slider free-falling is allowed to fit tightly to Part IV sidewall and outer tube inner wall, then female joint is threaded or grafting with urceolus, be fixed with hold-down screw again, namely assembling is completed.
During use, rationally make use of the change that outer tube inner chamber salvages space fully, limited the range of movement of movable slider and fixed slider by the limited step in urceolus, allow between movable slider with outer tube inner wall and be closely engaged.Utilize the relative sliding of movable slider and fixed slider, movable slider and fixed slider closely cooperate in a free state, very close to each other between movable slider and outer tube inner wall, when fishing socket is lowered into fish position, by pressing down or turning slider dipper, fish is made to enter in urceolus by guide shoe mouth, continue to press down or rotate, fish is allowed to back down movable slider, slowly rotate, make movable slider upward sliding, and there is space between outer tube inner wall, the salvaging tooth between movable slider and outer tube inner wall is utilized to be blocked by fish, then upwards tubing string is carried, movable slider is due to the downward landing of Action of Gravity Field of himself, make fish by inflexibly be stuck between movable slider and outer tube inner wall, along with slide block type dipper takes out together, for some small volumes, fish in irregular shape can play particularly preferred salvaging effect, solve the leak of existing fishing operation.The design scheme of embodiments of the invention is very reliable and secure, simple to operate, fishing requirement repeatedly can be carried out, can accomplish to salvage accurately and rapidly for smallclothes fish, flexibly simple to operate, salvage, circulate and do not conflict, duty cycle can be reduced, save the hundreds thousand of unit of cost, can meet the requirement of present high-efficient homework, be the necessary product of industry development.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a slide block type dipper, is characterized in that, comprising: top connection, urceolus, fixed slider and movable slider; Wherein,
One end of described urceolus connects described top connection, and the other end is set to unenclosed construction;
Described fixed slider comprises the first side wall fixed with outer tube inner wall and the second sidewall in an inclined-plane do not fitted with described outer tube inner wall; Wherein, described second sidewall comprises near the first end of described top connection and the second end away from described top connection, and the beeline between described first end and described the first side wall is less than the beeline between described second end and described the first side wall;
Described movable slider has and to match with the second sidewall of described fixed slider and described movable slider can be made along the 3rd sidewall of described second side walls, and the 4th sidewall that can fit with described outer tube inner wall;
Wherein, the beeline between one end of the close described top connection of described 3rd sidewall and described 4th sidewall is greater than the beeline between the second end of described second sidewall and described 4th sidewall.
2. slide block type dipper according to claim 1, is characterized in that, described 4th sidewall is provided with salvaging tooth.
3. slide block type dipper according to claim 1, is characterized in that,
Described outer tube inner wall is provided with limited step;
The first side wall of described fixed slider is provided with the fixed station abutted against with described limited step;
One end and the described top connection of the close described top connection of described fixed slider abut against.
4. slide block type dipper according to claim 1, is characterized in that, described fixed slider also has the 5th sidewall in inclined-plane, and described 5th sidewall has first end and the second end; Wherein,
The first end of described 5th sidewall connects the second end of described second sidewall, and the second end of described 5th sidewall connects one end away from described top connection of described the first side wall;
Opening between the first end of described 5th sidewall and outer tube inner wall is less than the opening between the second end of described 5th sidewall and outer tube inner wall.
5. the slide block type dipper according to claim 1 or 4, is characterized in that, described movable slider also has the 6th sidewall;
One end of described 6th sidewall connects one end away from described top connection of described movable slider the 3rd sidewall; The other end of described 6th sidewall connects one end away from described top connection of described movable slider the 4th sidewall;
Wherein, the space between described 6th sidewall one end and outer tube inner wall is greater than the space between the described 6th sidewall other end and outer tube inner wall.
6. slide block type dipper according to claim 5, is characterized in that, the 5th sidewall of described fixed slider is identical with angle with the incline direction of the 6th sidewall of described movable slider.
7. slide block type dipper according to claim 1, is characterized in that, the other end of described urceolus is set to guide shoe mouth.
8. slide block type dipper according to claim 1, is characterized in that, described top connection is female joint, and one end plug-in mounting of described female joint enters in described urceolus, and is fixed by fixed screw and described urceolus.
9. slide block type dipper according to claim 8, is characterized in that, described female joint is inner hollow, both ends open structure, and described female joint inside is communicated with the inside of described urceolus.
10. slide block type dipper according to claim 3, is characterized in that, in the form of a ring, and described outer tube inner wall is provided with one week limited step to described limited step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410539074.2A CN104314501B (en) | 2014-10-13 | 2014-10-13 | A kind of slide block type dipper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410539074.2A CN104314501B (en) | 2014-10-13 | 2014-10-13 | A kind of slide block type dipper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104314501A true CN104314501A (en) | 2015-01-28 |
| CN104314501B CN104314501B (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410539074.2A Active CN104314501B (en) | 2014-10-13 | 2014-10-13 | A kind of slide block type dipper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112969840A (en) * | 2018-12-31 | 2021-06-15 | 哈里伯顿能源服务公司 | Disturbance-based borehole diameter reconstruction |
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| US5054832A (en) * | 1990-07-10 | 1991-10-08 | Wada Ventures | Fishing tool for retrieving implements from a hole |
| US5197773A (en) * | 1991-10-15 | 1993-03-30 | Otis Engineering Corporation | Running and pulling tool |
| CN2690574Y (en) * | 2004-04-09 | 2005-04-06 | 大庆油田有限责任公司 | Flat fish oil push tube trip spear for small diameter hole |
| CN2744827Y (en) * | 2004-11-18 | 2005-12-07 | 辽河石油勘探局 | Retractable slider slips fishing spear |
| CN203626680U (en) * | 2013-11-26 | 2014-06-04 | 中国石油天然气股份有限公司 | Multifunctional sucker rod fisher |
| CN203756101U (en) * | 2013-12-06 | 2014-08-06 | 中国石油天然气股份有限公司 | Overshot with core-through double sliding blocks |
| CN204186333U (en) * | 2014-10-13 | 2015-03-04 | 安东石油技术（集团）有限公司 | A kind of slide block type dipper |
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2014
- 2014-10-13 CN CN201410539074.2A patent/CN104314501B/en active Active
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|---|---|---|---|---|
| US5054832A (en) * | 1990-07-10 | 1991-10-08 | Wada Ventures | Fishing tool for retrieving implements from a hole |
| US5197773A (en) * | 1991-10-15 | 1993-03-30 | Otis Engineering Corporation | Running and pulling tool |
| CN2690574Y (en) * | 2004-04-09 | 2005-04-06 | 大庆油田有限责任公司 | Flat fish oil push tube trip spear for small diameter hole |
| CN2744827Y (en) * | 2004-11-18 | 2005-12-07 | 辽河石油勘探局 | Retractable slider slips fishing spear |
| CN203626680U (en) * | 2013-11-26 | 2014-06-04 | 中国石油天然气股份有限公司 | Multifunctional sucker rod fisher |
| CN203756101U (en) * | 2013-12-06 | 2014-08-06 | 中国石油天然气股份有限公司 | Overshot with core-through double sliding blocks |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112969840A (en) * | 2018-12-31 | 2021-06-15 | 哈里伯顿能源服务公司 | Disturbance-based borehole diameter reconstruction |
| CN112969840B (en) * | 2018-12-31 | 2023-03-10 | 哈里伯顿能源服务公司 | Disturbance-based borehole diameter reconstruction |
| US11976526B2 (en) | 2018-12-31 | 2024-05-07 | Halliburton Energy Services, Inc. | Perturbation based well path reconstruction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104314501B (en) | 2017-03-08 |
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