CN104314501B - A kind of slide block type dipper - Google Patents
A kind of slide block type dipper Download PDFInfo
- Publication number
- CN104314501B CN104314501B CN201410539074.2A CN201410539074A CN104314501B CN 104314501 B CN104314501 B CN 104314501B CN 201410539074 A CN201410539074 A CN 201410539074A CN 104314501 B CN104314501 B CN 104314501B
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- Prior art keywords
- side wall
- outer tube
- slide block
- wall
- top connection
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- 238000010276 construction Methods 0.000 claims description 3
- 241000251468 Actinopterygii Species 0.000 abstract description 49
- 230000001788 irregular Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 206010061688 Barotrauma Diseases 0.000 description 1
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 1
- 238000005299 abrasion Methods 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
- 239000012634 fragment Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling 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
Landscapes
- 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 kind of slide block type dipper, is related to oil, gas well underground work technical field, solves existing fishing tool and cannot realize the salvaging to little fish, irregular fish.The technical scheme that the present invention is mainly adopted is：A kind of slide block type dipper, including top connection, the outer tube of connection top connection, the fixed slider being arranged in outer tube and movable slider；Fixed slider includes the first side wall that fixes with outer tube inner wall, the second sidewall being of an inclined plane, second sidewall includes first end and the second end away from top connection near top connection, and the beeline between first end and the first side wall is less than the beeline between the second end and the first side wall；Movable slider includes the 3rd side wall that match, that movable slider can be made to slide along second sidewall, and the 4th side wall that can be fitted with outer tube inner wall with the second sidewall on fixed slider.Present invention is mainly used for realizing, the salvaging of in irregular shape fish less to size.
Description
Technical field
The present invention relates to oil, gas well underground work technical field, more particularly to a kind of slide block type dipper.
Background technology
In oil, in gas well operation, with the prolongation of activity duration, remain in shaft bottom fish (as the metal class after set milling,
Bore the cement fragment after plug, corrosion tubing string chip, formation sand production etc.) normal operation will be affected, therefore need to be in the well workover in later stage
In operation, fish is salvaged out.
Prior art generally using die nipple, drag for lance and fishing socket and process fish trouble.Die nipple, lance is dragged for mainly for having relatively
The fish of big hydrophthalmia, with ensure into well fishing tool intensity enough, even if otherwise engaging fish, also frangibility.Fishing socket is big
Cause is divided into reversible fishing socket and slip socket, and the overwhelming majority is only applicable to salvage the reinforcement of light traveller, body, bores
Tool joint and other cylindrical fish in the range of given size.
Inventor has found that the limiting structure of above-mentioned fishing tool is more complicated, it is comparatively laborious to operate, and for size relatively
Little, in irregular shape fish is difficult to be salvaged.
Content 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 a kind of simple structure
Slide block type fish, meets to little fish, and irregular fish is salvaged, and improves and salvages efficiency.
For reaching above-mentioned purpose, present invention generally provides following technical scheme：
Embodiments of the invention provide a kind of slide block type dipper, including：Top connection, outer tube, fixed slider and movable slider；Its
In,
One end of the outer tube connects the top connection, and the other end is set to unenclosed construction；
The fixed slider is included the first side wall that is fixed with outer tube inner wall and with the outer tube inner wall fits is not in
The second sidewall on one inclined-plane；Wherein, the second sidewall is included near the first end of the top connection and away from the top connection
The second end, the beeline between the first end and the first side wall less than second end and the first side wall it
Between beeline；
The movable slider have match with the second sidewall of the fixed slider and the movable slider can be made along described second
3rd side wall of side walls, and the 4th side wall that can be fitted with the outer tube inner wall；
Wherein, wherein, most short between one end of the close described top connection of the 3rd side wall and the 4th side wall
Distance is more than the beeline between the second end of the second sidewall and the 4th side wall.
Aforesaid slide block type dipper, is provided with salvaging tooth on the 4th side wall.
Aforesaid slide block type dipper, is provided with limited step on the outer tube inner wall；On the first side wall of the fixed slider
It is provided with the fixed station abutted against with the limited step；One end of the close described top connection of the fixed slider with described on connect
Head is abutted against.
Aforesaid slide block type dipper, the fixed slider also have the 5th side wall in inclined-plane, and the 5th side wall has the
One end and the second end；Wherein,
The first end of the 5th side wall connects the second end of the second sidewall, the second end connection of the 5th side wall
One end away from the top connection of the first side wall；
Between the first end of the 5th side wall and outer tube inner wall opening less than the 5th side wall the second end with outer
Opening between cylinder inwall.
Aforesaid slide block type dipper, the movable slider also have the 6th side wall；One end connection of the 6th side wall is described
One end away from the top connection of the 3rd side wall of movable slider；The other end of the 6th side wall connects the 4th side of movable slider
One end away from the top connection of wall.
Wherein, the space between the 6th side wall one end and outer tube inner wall is more than the 6th side wall other end and outer tube
Space between inwall.
Aforesaid slide block type dipper, the 5th side wall of the fixed slider and the incline direction of the 6th side wall of the movable slider
Identical with angle.
Aforesaid slide block type dipper, the other end of the outer tube are set to guide shoe mouth.
Aforesaid slide block type dipper, the top connection are female joint, and one end of the female joint is inserted in the outer tube,
And fixed with the outer tube by fixed screw.
Aforesaid slide block type dipper, the female joint be inner hollow, both ends open structure, and the female joint with described
The inside connection of outer tube.
Aforesaid slide block type dipper, the limited step are annular in shape, and the outer tube inner wall is provided with one week limited step.
By technique scheme, embodiment of the present invention slide block type dipper at least has following advantages：
The simple structure of the slide block type dipper of the embodiment of the present invention, its mainly include top connection, outer tube, movable slider and determine cunning
Block, realizes the connection of slide block type dipper and lifting instrument by top connection；By between fixed slider, movable slider, outer tube inner wall
Coordinate, just can achieve down-hole fish can be automatically in gap of the movable slider with outer tube inner wall, so as to realize to down-hole size
The salvaging of less and irregular fish.
Further, salvaging tooth is additionally provided with the movable slider in the embodiment of the present invention, to ensure that fish can be tightr
Be stuck between movable slider and outer tube inner wall, so that it is guaranteed that the slide block type dipper of the present embodiment upper move during fish not
To landing, improve and salvage efficiency and intensity.
Slide block type dipper provided in an embodiment of the present invention can achieve salvage, exit, circulation of drilling fluid operation, fish head can be solved
The fishing operation problem of jagged, damaged and substantial deviation borehole axis, can play a significant role in oilfield salvage operation；
Can meet to little junk, irregular junk is salvaged, simple to operate, duty cycle and cost is greatly reduced, improve life
Efficiency is produced.
Description of the drawings
Fig. 1 is a kind of structural representation of slide block type dipper provided in an embodiment of the present invention；
Fig. 2 is the part-structure schematic diagram of the salvaging tooth of slide block type dipper provided in an embodiment of the present invention；
Fig. 3 is the outer tube structure schematic diagram of slide block type dipper provided in an embodiment of the present invention.
Specific embodiment
For further illustrating that the present invention is to reach technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to the specific embodiment according to the present patent application, structure, feature and its effect, describe in detail such as
Afterwards.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily same embodiment.Additionally, one or more
Special characteristic, structure or feature in individual 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 is proposed, including：Top connection 1, outer tube 2,
Fixed slider 3 and movable slider 4.Wherein, one end connection top connection 1 of outer tube 2, the other end is unenclosed construction.Fixed slider 3, dynamic cunning
Block 4 is arranged in outer tube 2.Fixed slider 3 includes the first side wall 31 that fixes with 2 inwall of outer tube, and is not affixed with 2 inwall of outer tube
The second sidewall 32 being of an inclined plane that closes, and the second sidewall 32 includes the first end of close top connection 1 and away from top connection 1
The second end, between the first end of the second sidewall 32 and the first side wall 31 beeline less than second sidewall 32 the second end
With the beeline between the first side wall 31.That movable slider 4 includes to match with the second sidewall 32 on fixed slider 3 and can make
The 3rd side wall 41 that movable slider 4 is slided along second sidewall 32, and the 4th side wall 42 that can be fitted with the inwall of outer tube 2, and
The beeline of one end of the close top connection of the 3rd side wall 41 and the 4th side wall 42 is more than second end and the of second sidewall 32
The beeline of four side walls 42, to guarantee that fixed slider 3 is stuck in movable slider 4 in outer tube 2, the coming off of anti-stop slider 4.
Top connection is connected with sleeve pipe or other liftings, with side by the slide block type dipper that the present embodiment is provided when using
Just the slide block type dipper of the present embodiment is entered in oil, gas well, and by fixed slider 3 and movable slider 4 in outer tube 2.During use,
With the moving down of slide block dipper of the present embodiment, the jack-up upwards of movable slider 4 with moving up for movable slider 4, is moved and is slided by fish
With a space being gradually increased with upper shifting between block 4 and 2 inwall of outer tube, fish is moved to movable slider 4 and 2 inwall of outer tube
Between space in, then to upper lifting the present embodiment slide block dipper, 4 Action of Gravity Field of movable slider under gravity under
Sliding, so as to reduce the gap between movable slider and outer tube inner wall, so as to by fish tightly be stuck in movable slider 4 and 2 inwall of outer tube
Between, it is achieved that the salvaging of fish, this salvaging mode can realize, the salvaging of in irregular shape fish less to size,
And simple to operate, duty cycle and cost can be greatly reduced, so as to improve production efficiency.
It is preferred that another embodiment of the present invention provides a kind of slide block type dipper, in order that fish can be more closely by card
Between movable slider 4 and 2 inwall of outer tube, it is ensured that the slide block type dipper of the present embodiment upper move past in journey fish will not landing, such as
Shown in Fig. 2, the slide block type dipper in the present embodiment arranges salvaging tooth 421 on the 4th side wall 42 of movable slider 4.Process is above put forward
In, salvage tooth 421 and little fish or irregular fish are tightly blocked, so that the slide block type in the present embodiment is salvaged into
Power is higher, and effect more preferably, and makes slide block type salvage with tensile strength height, salvages fish size range greatly, can achieve to beat
Drag for, exit, circulation of drilling fluid operation, the fishing operation of jagged, the damaged and substantial deviation borehole axis of fish head can be solved the problems, such as,
Can play a significant role in oilfield salvage operation.
It is preferred that as shown in figure 3, in order that movable slider 4 and fixed slider 3 moving in dipper and realizing multidirectional beating
Drag for, meet diverse location and demand is salvaged, another embodiment of the present invention provides a kind of slide block dipper, compared with above-described embodiment, this
Limited step 5 is provided with 2 inwall of outer tube in embodiment, is provided with the first side wall 31 and consolidating that limited step 5 is abutted against
Determine platform 6, one end of the close top connection of fixed slider 3 is abutted against with the lower surface of top connection 1.The first side wall due to fixed slider 3
31 are fitted tightly with 2 inwall of outer tube, and its surface texture is coordinated with 2 inwall of outer tube, can carry out circumference along 2 inwall of outer tube
Rotation, by the combination of second sidewall 32 and the 3rd side wall 41 of movable slider 4, while drive movable slider 4 in 2 inwall inward turning of outer tube
Turn, when the position that fish enters is not in the position of suitable salvaging, by fish to 3 bottom of fixed slider and 4 bottom of movable slider
Active force, realizes the circumferentially displaced of movable slider 4 and fixed slider 3, so that fish enters into the position for being suitable for salvaging, that is, is located at dynamic
4 lower section of slide block, you can complete to salvage.
In order to the salvaging demand of diverse location is better met, the smooth salvaging of fish, another embodiment of the present invention is realized
A kind of slide block type dipper is provided, compared with above-described embodiment, fixed slider 3 also has a 5th side wall 33 in inclined-plane, the described 5th
Side wall 33 with first end and the second end, the second end of the first end connection second sidewall 32 of the 5th side wall, the of the 5th side wall
One end away from the top connection of two ends connection the first side wall 31；Opening between the first end of the 5th side wall and 2 inwall of outer tube
Mouth is less than the opening between the second end of the 5th side wall 33 and 2 inwall of outer tube, and the 5th side wall 33 is located at the first side wall 31
Lower section.The purpose of this design is, when the fish of the slide block type dipper lower end of the present embodiment is in 3 lower end of fixed slider,
Although the above embodiments can realize the circumference movement of fixed slider 3 by fish to the active force of fixed slider 3, but cannot
Show the accurate control in the circumferential displacement of fixed slider 3 and direction, it is ensured that fish more rapidly enters and can salvage area, the present embodiment
In being obliquely installed by the 5th side wall 33, fish can directly be moved to the lower section of movable slider 4 along the inclined-plane for inclining, while fish
Active force upwards can cause fixed slider 3 to carry out the circumference movement of certain distance, so that fish is located at immediately below movable slider 4,
The technical difficulty of salvaging is reduced, operability is increased, reduce the salvaging time.
It is preferred that another embodiment of the present invention provides a kind of slide block type dipper, compared with above-described embodiment, in the present embodiment
Movable slider 4 also have the 6th side wall 43, the 6th side wall 43 one end connection the 3rd side wall 41 of movable slider 4 away from top connection 1
One end；One end away from top connection 1 of other end connection the 4th side wall 42 of movable slider of the 6th side wall 43.6th side wall 43
Space between one end and 2 inwall of outer tube is less than the space between 43 other end of the 6th side wall and 2 inwall of outer tube, and the 6th side wall
43 lower sections for being located at the 4th side wall 42.By the purpose being so designed that it is, after fish enters into 4 lower section of movable slider, with
The 6th side wall on movable slider 4 can smoothly enter the gap between movable slider 4 and 2 inwall of outer tube, and the salvaging time is shorter, effect
More preferably.
It is preferred that the incline direction on the inclined-plane of the inclined-plane of the 5th side wall 33 of fixed slider and the 6th side wall 43 of movable slider and angle
Identical.The incline direction on the inclined-plane of the 5th side wall 33 is identical with angle, makes the velocity of displacement of fish and stress size maintain one
Relatively steady state, it is to avoid local pressure to fixed slider 3 or movable slider 4 is excessive or too small and the abrasion that produces, is conducive to
Extend the service life of fixed slider 3 and movable slider 4.
It is preferred that for the ease of salvaging, make fish be more easy to enter in outer tube 2, be set to guide shoe mouth 7 in 2 lower end of outer tube, with
When, it is to ensure being smoothed out for fishing, increases the tensile strength of slide block type dipper in the present embodiment, the top connection 1 is
Female joint, and the inserting of female joint lower end or the mode that is threaded connection be screwed in outer tube 2, and lead in the two outer wall for connecting
Cross fixed screw 8 both are fastened, the security of its salvaging process is can achieve preferably by four M10 fixing screws and stablize
Property.Female joint 1 is the both ends open structure of the inner hollow inside connection outer tube 2.
It is preferred that the limited step 5 in above-described embodiment is annularly arranged one week on 2 inwall of outer tube.Avoid in outer tube 2
Air cannot discharge and produce effects of air pressure fish and normally salvage, while arranging the limited step 5 of a week, make 3 He of fixed slider
The moving range of movable slider 4 is bigger, and fishing is more easy to carry out.And low cost, easy to process, according to sleeve pipe model can be
Row processing；In addition, its simple structure, salvaging process is not easy lock of tool drilling occur；Compared with other congenerous fishing tools, drag for
Obtain junk success rate high.
The slide block type dipper provided by embodiments of the invention, mounting means are as follows：Now fixed slider is placed in outer barrel,
Install the fixed station of fixed slider and the limited step cooperation in outer tube, then movable slider is put into, makes the 3rd of movable slider the
Side wall is coordinated with the second sidewall of fixed slider, i.e., the inclined-plane on movable slider is matched with the bevel inclination angle on fixed slider, and
Whether relative can slide between inspection movable slider and fixed slider, movable slider free-falling is allowed to Part IV side wall and outer tube
Wall is fitted tightly, and then female joint is threadeded with outer tube or grafting, then is fixed with fixing screws, that is, complete assembling.
During use, rationally sufficiently make use of outer tube inner chamber salvage space change, by the limited step in outer tube come
The range of movement of movable slider and fixed slider is limited, is allowed between movable slider and outer tube inner wall and is closely engaged.Using movable slider and determine cunning
The relative slip of block, movable slider and fixed slider tight fit, very close to each other between movable slider and outer tube inner wall in a free state,
When fishing socket is lowered into fish position, by pushing or turning slider dipper, fish is made to enter into outer tube by guide shoe mouth
Interior, continue to push or rotate, allow fish that movable slider is backed down, slowly rotate, movable slider upward sliding is made, is gone out between outer tube inner wall
Fish is blocked using the salvaging tooth between movable slider and outer tube inner wall, carries tubing string then up by existing space, and movable slider is due to which
The downward landing of itself Action of Gravity Field, makes fish by being stuck between movable slider and outer tube inner wall inflexibly, with slide block type dipper
Take out together, particularly preferred salvaging effect can be played for some small volumes, fish in irregular shape, solve existing beating
Drag for the leak of technology.The design of embodiments of the invention is very reliable and secure, simple to operate, can carry out multiple salvaging
Job requirements, can accomplish accurately and rapidly to salvage for smallclothes fish, simple to operate flexible, salvage, circulate and do not conflict, can
To reduce duty cycle, cost-effective hundreds thousand of units, the requirement of present high-efficient homework is disclosure satisfy that, is must producing for industry development
Product.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by the scope of the claims.
Claims (9)
1. a kind of slide block type dipper, it is characterised in that include：Top connection, outer tube, fixed slider and movable slider；Wherein,
One end of the outer tube connects the top connection, and the other end is set to unenclosed construction；
The fixed slider includes the first side wall and not oblique in what the outer tube inner wall fitted that fixes with outer tube inner wall
The second sidewall in face；Wherein, the second sidewall includes the first end near the top connection and away from the top connection the
Two ends, the beeline between the first end and the first side wall are less than between second end and the first side wall
Beeline；
The movable slider have match with the second sidewall of the fixed slider and the movable slider can be made along the second sidewall
The 3rd side wall for sliding, and the 4th side wall that can be fitted with the outer tube inner wall；
Wherein, the beeline between one end of the close described top connection of the 3rd side wall and the 4th side wall is more than institute
State the beeline between the second end of second sidewall and the 4th side wall；
Limited step is provided with the outer tube inner wall, is provided with and the limited step phase on the first side wall of the fixed slider
The fixed station of abutting, one end of the close described top connection of the fixed slider are abutted against with the top connection.
2. slide block type dipper according to claim 1, it is characterised in that be provided with salvaging tooth on the 4th side wall.
3. slide block type dipper according to claim 1, it is characterised in that the fixed slider also has the 5th side in inclined-plane
Wall, the 5th side wall have first end and the second end；Wherein,
The first end of the 5th side wall connects the second end of the second sidewall, and the second end connection of the 5th side wall is described
One end away from the top connection of the first side wall；
Opening between the first end of the 5th side wall and outer tube inner wall is less than in second end and outer tube of the 5th side wall
Opening between wall.
4. the slide block type dipper according to claim 1 or 3, it is characterised in that the movable slider also has the 6th side wall；
One end of the 6th side wall connects one end away from the top connection of the 3rd side wall of movable slider；6th side
The other end of wall connects one end away from the top connection of the 4th side wall of movable slider；
Wherein, the space between the 6th side wall one end and outer tube inner wall is more than the 6th side wall other end and outer tube inner wall
Between space.
5. slide block type dipper according to claim 4, it is characterised in that the 5th side wall of the fixed slider and the dynamic cunning
The incline direction of the 6th side wall of block is identical with angle.
6. slide block type dipper according to claim 1, it is characterised in that the other end of the outer tube is set to guide shoe mouth.
7. slide block type dipper according to claim 1, it is characterised in that the top connection is female joint, the female joint
One end insert in the outer tube, and fixed with the outer tube by fixed screw.
8. slide block type dipper according to claim 7, it is characterised in that the female joint is inner hollow, both ends open
Connect with the inside of the outer tube inside structure, and the female joint.
9. slide block type dipper according to claim 1, it is characterised in that the limited step is annular in shape, and the outer tube
Inwall is provided with one week 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 CN104314501A (en) | 2015-01-28 |
| CN104314501B true 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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| Country | Link |
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| CN (1) | CN104314501B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| SG11202101326VA (en) | 2018-12-31 | 2021-03-30 | Halliburton Energy Services Inc | Perturbation based well path reconstruction |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 salvaging device |
| CN203756101U (en) * | 2013-12-06 | 2014-08-06 | 中国石油天然气股份有限公司 | Through dual slider socket |
| 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 |
-
2014
- 2014-10-13 CN CN201410539074.2A patent/CN104314501B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 salvaging device |
| CN203756101U (en) * | 2013-12-06 | 2014-08-06 | 中国石油天然气股份有限公司 | Through dual slider socket |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104314501A (en) | 2015-01-28 |
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