CN108518193A - Light pipe shape junk unfreezing fishing device - Google Patents
Light pipe shape junk unfreezing fishing device Download PDFInfo
- Publication number
- CN108518193A CN108518193A CN201810458351.5A CN201810458351A CN108518193A CN 108518193 A CN108518193 A CN 108518193A CN 201810458351 A CN201810458351 A CN 201810458351A CN 108518193 A CN108518193 A CN 108518193A
- Authority
- CN
- China
- Prior art keywords
- outside
- ontology
- dipper
- top connection
- light pipe
- 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
- 241000251468 Actinopterygii Species 0.000 claims abstract description 46
- 230000006835 compression Effects 0.000 claims abstract description 23
- 238000007906 compression Methods 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 14
- 210000000078 claw Anatomy 0.000 claims description 33
- 230000008602 contraction Effects 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 9
- 238000011010 flushing procedure Methods 0.000 abstract description 8
- 238000005086 pumping Methods 0.000 abstract description 6
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005406 washing Methods 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
-
- 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
- E21B31/03—Freeing by flushing
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 present invention relates to petroleum gas underground unfreezing fishing technical field of tools, it is a kind of light pipe shape junk unfreezing fishing device, it includes top connection, dipper ontology and guide shoe, the lower outside of top connection is fixedly mounted with the upper outside of dipper ontology, and the lower outside of dipper ontology and the upper inner of guide shoe are fixedly mounted；There is compression assembly in the lower inside limit installation of dipper ontology.Structure of the invention is reasonable and compact, it is easy to use, it can be salvaged to coiled tubing in well or without box cupling thin-walled tubular junk, especially salvage stuck point position be located at fish bottom by card fish when, it is noted by ground face-pumping and establishes cycle, pumping liquid is formed by fish inner cavity to shaft bottom along fishing string and is recycled, cycle liquid energy effectively reaches being rinsed by card division position for fish bottom, fish unfreezing can be preferably helped by the flushing of huge discharge or hot wash, light pipe class junk unfreezing in well is greatly improved, to improve the success rate of salvaging.
Description
Technical field
The present invention relates to petroleum gas underground unfreezing fishing technical field of tools, are a kind of light pipe shape junk unfreezing fishings
Device.
Background technology
During carrying out the Downhole Constructions such as sand washing, de-plugging with coiled tubing or conventional tubing string, it will usually due to
Entering well equipment, either there are the chance reasons such as card phenomenon or oil pipe fatigue, weld seam desoldering such as sand card, wax card in tubing string, leads to continuous oil
Pipe or conventional tubing string fall into shaft bottom.
It is such to fall well casing column generally and have the characteristics that following several classes：1, junk top of fish is light-pipe structure without box cupling in well, such
The usual wall thickness of light pipe is relatively thin, and material is relatively soft；2, there are sand card or wax cards for the tubing string bottom equipment of such junk or tubing string
Deng chance card-like condition, unfreezing need to first be carried out by salvaging junk；3, the top of fish of such junk has a certain distance, and stuck point position apart from shaft bottom
Setting in fish bottom, by fishing string in Position on the top of the fish circulation flushing, it can not be flushed to shaft bottom stuck point, it is invalid to unfreezing
Fruit.
And current fishing tool can only be salvaged, cannot effectively flushing manhole bottom by card machine have and tubing string（Do not have unfreezing
Function）, then, for stuck point position in well be located at fish bottom by card fish, due to being difficult to unfreezing, then be difficult to successfully beat
Fishing.
Invention content
The present invention provides a kind of light pipe shape junk unfreezing fishing devices, overcome the deficiency of the above-mentioned prior art, energy
Effectively solve it is existing fall well casing column fishing tool salvage stuck point position be located at fish bottom by card fish when, due to being difficult to solve
Card, leads to the problem that fishing success ratio is low；And the present invention has both the function of salvaging and unfreezing, which thereby enhances fishing success ratio.
The technical scheme is that realized by following measures：A kind of light pipe shape junk unfreezing fishing device, packet
Top connection, dipper ontology and guide shoe are included, the lower outside of top connection is fixedly mounted with the upper outside of dipper ontology, dipper ontology
Lower outside and guide shoe upper inner be fixedly mounted；There is compression assembly in the lower inside limit installation in dipper ontology,
Dipper ontology inner sleeve between compression assembly and top connection is equipped with slip sleeve, and limit installation, which has to block, in slip sleeve falls
The fishing slip of fish.
Here is the further optimization and/or improvements to foregoing invention technical solution：
Above-mentioned fishing slip includes slips ontology, and the top of slips ontology is limited by top connection bottom end, under slips ontology
End is circumferentially arranged at intervals at least two elastic card claws, is provided with the slips of crown upward from top to bottom on the inside of elastic card claw
Tooth；Be provided on the inside of the elastic card claw below slip insert in it is interior it is it is outer under skewed interior guiding face.
Slips ontology above above-mentioned elastic card claw includes that the heavy wall section on top and lower inner diameter are more than heavy wall section internal diameter
Thin segment, thin segment with above slip insert between elastic card claw on the inside of be provided with the transition conical surface being connected with thin segment, mistake
Cross conical surface taper with a narrow upper and lower width；Free gap is formed between adjacent elastic card claw, free gap extends upwardly to thin
Wall section.
It is provided on the outside of elastic card claw below above-mentioned slip insert in outside upper skewed outer contraction front under interior, in slip sleeve
Lower inside be provided with the limit conical surface that can coordinate with outer contraction front, limit the conical surface above slip sleeve on the inside of be provided with out
The limiting groove of mouth upward, fishing slip are located in limiting groove, and outer contraction front energy seat is on the limit conical surface.
Above-mentioned compression assembly is cartridge, external compression annular groove is arranged at intervals with above and below the outside of cartridge, close
The inside of sealing cylinder is arranged at intervals with interior compression annular groove up and down；The lower inside of dipper ontology is provided with positive stop lug boss, slips
Set and cartridge are sequentially sleeved on from top to bottom in the dipper ontology between top connection and positive stop lug boss.
The lower outside of above-mentioned top connection and the upper outside of dipper ontology are threadably secured installation, outside top connection lower part
It is provided at least between on the outside of top connection below threaded connection section on the outside of side and dipper body upper part and on the inside of dipper ontology
One of sealing ring；The lower outside of dipper ontology and the upper inner of guide shoe are threadably secured installation.
Structure of the invention is reasonable and compact, easy to use, can be fallen to coiled tubing in well or without box cupling thin-walled tubular
Object is salvaged, especially salvage stuck point position be located at fish bottom by card fish when, pass through ground face-pumping note and establish and recycle, pump
Enter liquid along fishing string by fish inner cavity to shaft bottom formed recycle, cycle liquid energy effectively reach fish bottom by card division
Position is rinsed, and can preferably be helped fish unfreezing by the flushing of huge discharge or hot wash, be greatly improved light pipe in well
Class junk unfreezing, to improve the success rate of salvaging.
Description of the drawings
Attached drawing 1 is the main view half section schematic of preferred embodiment.
Attached drawing 2 is the main view section view enlarged structure schematic diagram of fishing slip.
Attached drawing 3 is the main view section view enlarged structure schematic diagram of slip sleeve.
Attached drawing 4 is the main view half section enlarged structure schematic diagram of cartridge.
Coding in attached drawing is respectively：1 is top connection, and 2 be dipper ontology, and 3 be guide shoe, and 4 be slip sleeve, and 5 block to salvage
Watt, 6 be elastic card claw, and 7 be slip insert, and 8 be heavy wall section, and 9 be thin segment, and 10 be the transition conical surface, and 11 be free gap, and 12 be outer
Contraction front, 13 be the limit conical surface, and 14 be limiting groove, and 15 be cartridge, and 16 be external compression annular groove, and 17 be interior compression annular groove,
18 be positive stop lug boss, and 19 be sealing ring, and 20 be interior guiding face.
Specific implementation mode
The present invention is not limited by following embodiments, can be determined according to the technique and scheme of the present invention with actual conditions specific
Embodiment.
In the present invention, for ease of description, the description of the relative position relation of each component is according to Figure of description 1
Butut mode be described, such as：The position relationship of front, rear, top, and bottom, left and right etc. is the cloth according to Figure of description 1
Figure direction determines.
With reference to embodiment and attached drawing, the invention will be further described：
As shown in attached drawing 1 to 4, which includes top connection 1, dipper ontology 2 and guide shoe 3, is above connect
First 1 lower outside is fixedly mounted with the upper outside of dipper ontology 2, in the lower outside of dipper ontology 2 and the top of guide shoe 3
Side is fixedly mounted；There is compression assembly in the lower inside limit installation in dipper ontology 2, between compression assembly and top connection 1
2 inner sleeve of dipper ontology slip sleeve 4 is housed, being mounted in the slip sleeve 4 has the fishing slip 5 that can block fish.
The present invention can be salvaged to coiled tubing in well or without box cupling thin-walled tubular junk, and be built by compressing assembly
Vertical fishing string and the sealed connection that junk is salvaged in well, fishing string are completed with junk in well after being tightly connected, Ke Yitong
It crosses ground face-pumping note and establishes cycle, abundant circulation flushing shaft bottom is had by card machine and tubing string substantially increases to realize fish unfreezing
Unfreezing success rate contributes to the successful salvaging of fish after unfreezing success.I.e. the present invention solves previous fishing tool and can only beat
Fishing, cannot effectively flushing manhole bottom by card machine have and tubing string shortcoming.
Especially salvage stuck point position be located at fish bottom by card fish when, recycled, be pumped by the note foundation of ground face-pumping
Liquid along fishing string by fish inner cavity to shaft bottom formed recycle, cycle liquid energy effectively reach fish bottom by card division position
It is rinsed, fish unfreezing can preferably be helped by the flushing of huge discharge or hot wash, greatly improve light pipe class in well
Junk unfreezing, to improve the success rate of salvaging.
Guide shoe 3 plays guiding function during salvaging, it is therefore an objective to smoothly introduce the top of fish of fish in fishing slip 5.
Above-mentioned light pipe shape junk unfreezing fishing device can be made further optimization and/or improvements according to actual needs：
As shown in Fig. 2, fishing slip 5 includes slips ontology, and the top of slips ontology is limited by 1 bottom end of top connection, in card
The lower end edge circle spacing of watt ontology is provided at least two elastic card claws 6, is arranged from top to bottom in 6 inside of elastic card claw with teeth
The slip insert 7 of point upward；The inside of elastic card claw 6 below slip insert 7 be provided in it is interior it is it is outer under skewed interior guiding face
20。
By it is interior it is it is outer under skewed interior guiding face 20, fish is introduced into 6 inside of elastic card claw.
For tubing string, especially smooth tubing string, slip insert 7 can increase tubing string friction in down stroke, can effectively block
The tight fish into fishing slip 5.
As shown in attached drawing 1,2, the slips ontology of 6 top of elastic card claw includes that the heavy wall section 8 on top and lower inner diameter are more than
The thin segment 9 of 8 internal diameter of heavy wall section, above the thin segment 9 and slip insert 7 between 6 inside of elastic card claw be provided with and thin segment 9
The transition conical surface 10 of linking, 10 taper with a narrow upper and lower width of the transition conical surface；Free gap is formed between adjacent elastic card claw 6
11, free gap 11 extends upwardly to thin segment 9.
In 6 opening to be expanded of elastic card claw or contraction, thin segment 9 is that elastic card claw 6 provides flexible deformation, convenient for elasticity
Claw 6 opens and the switching of contraction state.
Free gap 11 is the space that elastic card claw 6 provides that expansion is opened.
As shown in attached drawing 1,2,3,6 outside of elastic card claw below slip insert 7 is provided in outside upper skewed under interior
Outer contraction front 12 is provided with the limit conical surface 13 that can coordinate with outer contraction front 12 in the lower inside of slip sleeve 4, in the limit conical surface
4 inside of slip sleeve of 13 tops is provided with opening up limiting groove 14, and fishing slip 5 is located in limiting groove 14, and
12 energy seat of outer contraction front is on the limit conical surface 13.
It is exerted a force to the outer contraction front 12 of elastic card claw 6 by the limit conical surface 13 that slip sleeve 4 is arranged, is carried to elastic card claw 6
For contract power, after by inside active force, elastic card claw 6 is radially-inwardly shunk the outer contraction front 12 of elastic card claw 6.
As shown in attached drawing 1,4, compression assembly is cartridge 15, is arranged at intervals with above and below the outside of cartridge 15 outer
Annular groove 16 is compressed, interior compression annular groove 17 is arranged at intervals with above and below the inside of cartridge 15；In the lower inside of dipper ontology 2
It is provided with positive stop lug boss 18, slip sleeve 4 and cartridge 15 are sequentially sleeved between top connection 1 and positive stop lug boss 18 from top to bottom
Dipper ontology 2 in.
By the way that external compression annular groove 16 and interior compression annular groove 17 is arranged in cartridge 15, make cartridge 15 by sufficiently large
Downward axial force after, cartridge 15 faster downwards compression, fishing string is established by compressed cartridge 15
With the sealed connection for being salvaged junk in well；Conversely, after axial force disappears, 15 Rapid reversal compressive state of cartridge.
As shown in Fig. 1, the lower outside of top connection 1 and the upper outside of dipper ontology 2 are threadably secured installation, on
1 lower outside of connector and 2 inside of 1 outside of top connection and dipper ontology below the threaded connection section of 2 upper outside of dipper ontology
Between be provided at least one of sealing ring 19；The lower outside of dipper ontology 2 is threadably secured peace with the upper inner of guide shoe 3
Dress.
The above technical characteristic constitutes highly preferred embodiment of the present invention, is imitated with stronger adaptability and best implementation
Fruit can increase and decrease non-essential technical characteristic, to meet the needs of different situations according to actual needs.
The use process of preferred embodiment：After the present invention is connected by top connection 1 and fishing string, decentralization
The present invention operates fishing string to Position on the top of the fish, top of fish is introduced guide shoe 3, and transfer tubing string certain position, so that top of fish is passed through and draws
Shoes 3 enter in fishing slip 5；It is slightly less than and is dragged for due in fishing, selects the slip insert 7 of fishing slip 5 to push up diameter
The outer diameter of tubing string, when top of fish is by fishing slip 5,6 slight expansion of elastic card claw of 5 lower part of fishing slip, elastic card claw 6 itself
Elasticity block fish for slip insert 7 and provide pretightning force, above carry fishing string at this time, then block the fishing slip 5 of top of fish with
Top of fish, relative movement and stress, continuation upper lifting pipe post, fishing slip 5 continue to move down downwards in slip sleeve 4, salvage card
Watt outer contraction front 12 of 5 lower parts is come into full contact with the limit conical surface 13 of slip sleeve 4 and stress, the outer contraction front 12 of fishing slip 5
13 radially inward extruding force of the conical surface is limited by slip sleeve 4, makes fishing slip 5 to contract, tightly to block fish top of fish；
Continue above to carry fishing string, fishing slip 5 moves down and crush seal packing element with slip sleeve 4 in dipper ontology 2
15, cartridge 15, which is squeezed, occurs certain deformation, and 15 lateral surface of cartridge of compressional deformation is tightly attached to 2 inner cavity of dipper ontology
Body, medial surface are tightly attached to fish outer wall, to realize fishing string and the sealing inside and outside fish；Certain fishing string is kept to carry
Load up makes slip sleeve 4 that there is certain lower pressure cartridge 15 to be made to keep sealing, at this time from ground pumping liquid, pump
Enter liquid along fishing string by fish inner cavity to shaft bottom formed recycle, cycle liquid energy effectively reach fish bottom by card division
Position is rinsed, and can preferably be helped fish unfreezing by the flushing of huge discharge or hot wash, be greatly improved light pipe in well
The success rate of the unfreezing of class junk, salvaging.
Claims (9)
1. a kind of light pipe shape junk unfreezing fishing device, it is characterised in that including top connection, dipper ontology and guide shoe, top connection
The upper outside of lower outside and dipper ontology is fixedly mounted, and the lower outside of dipper ontology and the upper inner of guide shoe are fixed and pacified
Dress；There is compression assembly in the lower inside limit installation in dipper ontology, the dipper ontology between compression assembly and top connection
Inner sleeve is equipped with slip sleeve, and being mounted in slip sleeve has the fishing slip that can block fish.
2. light pipe shape junk unfreezing fishing device according to claim 1, it is characterised in that fishing slip includes slips sheet
The top of body, slips ontology is limited by top connection bottom end, and the lower end edge circle spacing of slips ontology is provided at least two
Elastic card claw is provided with the slip insert of crown upward from top to bottom on the inside of elastic card claw；Elastic card claw below slip insert
Inside be provided in it is interior it is it is outer under skewed interior guiding face.
3. light pipe shape junk unfreezing fishing device according to claim 2, it is characterised in that the slips above elastic card claw
Ontology includes the heavy wall section on top and lower inner diameter is more than the thin segment of heavy wall section internal diameter, above the thin segment and slip insert between
Elastic card claw on the inside of be provided with the transition conical surface being connected with thin segment, transition conical surface taper with a narrow upper and lower width；Adjacent
Free gap is formed between elastic card claw, free gap extends upwardly to thin segment.
4. light pipe shape junk unfreezing fishing device according to claim 2 or 3, it is characterised in that the elasticity below slip insert
It is provided on the outside of claw in outside upper skewed outer contraction front under interior, being provided in the lower inside of slip sleeve can be with outer contraction front
The limit conical surface of cooperation is provided with opening up limiting groove, fishing slip position on the inside of the slip sleeve above the limit conical surface
In in limiting groove, and outer contraction front energy seat is on the limit conical surface.
5. light pipe shape junk unfreezing fishing device according to claim 1 or 2 or 3, it is characterised in that compression assembly is close
Sealing cylinder is arranged at intervals with external compression annular groove above and below the outside of cartridge, in the inside of cartridge between the upper and lower every setting
There is interior compression annular groove；The lower inside of dipper ontology is provided with positive stop lug boss, slip sleeve and cartridge are from top to bottom sequentially
It is sleeved in the dipper ontology between top connection and positive stop lug boss.
6. light pipe shape junk unfreezing fishing device according to claim 4, it is characterised in that compression assembly is cartridge,
It is arranged at intervals with external compression annular groove above and below the outside of cartridge, interior compression is arranged at intervals with above and below the inside of cartridge
Annular groove；The lower inside of dipper ontology is provided with positive stop lug boss, slip sleeve and cartridge are sequentially sleeved on from top to bottom
In dipper ontology between connector and positive stop lug boss.
7. the light pipe shape junk unfreezing fishing device according to claims 1 or 2 or 3 or 6, it is characterised in that under top connection
Installation is threadably secured on the outside of portion with the upper outside of dipper ontology, on the outside of top connection lower outside and dipper body upper part
At least sealing ring together is provided between on the outside of top connection below threaded connection section and on the inside of dipper ontology；Under dipper ontology
On the outside of portion installation is threadably secured with the upper inner of guide shoe.
8. light pipe shape junk unfreezing fishing device according to claim 4, it is characterised in that the lower outside of top connection with
The upper outside of dipper ontology is threadably secured installation, top connection lower outside and the threaded connection on the outside of dipper body upper part
At least sealing ring together is provided between on the outside of the top connection of section lower section and on the inside of dipper ontology；The lower outside of dipper ontology with
The upper inner of guide shoe is threadably secured installation.
9. light pipe shape junk unfreezing fishing device according to claim 5, it is characterised in that the lower outside of top connection with
The upper outside of dipper ontology is threadably secured installation, top connection lower outside and the threaded connection on the outside of dipper body upper part
At least sealing ring together is provided between on the outside of the top connection of section lower section and on the inside of dipper ontology；The lower outside of dipper ontology with
The upper inner of guide shoe is threadably secured installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458351.5A CN108518193A (en) | 2018-05-14 | 2018-05-14 | Light pipe shape junk unfreezing fishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810458351.5A CN108518193A (en) | 2018-05-14 | 2018-05-14 | Light pipe shape junk unfreezing fishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108518193A true CN108518193A (en) | 2018-09-11 |
Family
ID=63430604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810458351.5A Pending CN108518193A (en) | 2018-05-14 | 2018-05-14 | Light pipe shape junk unfreezing fishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108518193A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798082A (en) * | 2018-10-16 | 2019-05-24 | 中国石油天然气股份有限公司 | Fishing tool |
| CN110886587A (en) * | 2019-10-12 | 2020-03-17 | 中国石油天然气集团有限公司 | Coiled tubing fisher and coiled tubing fishing method |
| CN111350470A (en) * | 2020-04-02 | 2020-06-30 | 四川安东油气工程技术服务有限公司 | Fishing tool |
| CN112112595A (en) * | 2020-09-30 | 2020-12-22 | 中国石油天然气集团有限公司 | Sealed fishing tool and fishing method |
| CN114059951A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Fishing type falling-proof device and falling-proof device using same |
| WO2022039762A1 (en) * | 2020-08-20 | 2022-02-24 | Saudi Arabian Oil Company | Assembly, retrieving device, and method for retrieving piping from a well |
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| CN200940468Y (en) * | 2006-07-26 | 2007-08-29 | 大港油田集团有限责任公司 | Packer packing element |
| CN203808903U (en) * | 2014-02-25 | 2014-09-03 | 中国石油天然气股份有限公司 | Sealed fishing spear |
| CN204140011U (en) * | 2014-10-11 | 2015-02-04 | 天合石油集团汇丰石油装备有限公司 | Reversible back-off dipper |
| CN105178907A (en) * | 2015-09-01 | 2015-12-23 | 上海大学 | Compression packer sealing structure |
| CN206190257U (en) * | 2017-02-28 | 2017-05-24 | 四川康克石油科技有限公司 | Cutting dipper |
| CN208380540U (en) * | 2018-05-14 | 2019-01-15 | 中国石油天然气集团公司 | Light pipe shape junk unfreezing fishing device |
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2018
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| CN200940468Y (en) * | 2006-07-26 | 2007-08-29 | 大港油田集团有限责任公司 | Packer packing element |
| CN203808903U (en) * | 2014-02-25 | 2014-09-03 | 中国石油天然气股份有限公司 | Sealed fishing spear |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798082A (en) * | 2018-10-16 | 2019-05-24 | 中国石油天然气股份有限公司 | Fishing tool |
| CN109798082B (en) * | 2018-10-16 | 2023-10-27 | 中国石油天然气股份有限公司 | Fishing tool |
| CN110886587A (en) * | 2019-10-12 | 2020-03-17 | 中国石油天然气集团有限公司 | Coiled tubing fisher and coiled tubing fishing method |
| CN111350470A (en) * | 2020-04-02 | 2020-06-30 | 四川安东油气工程技术服务有限公司 | Fishing tool |
| CN114059951A (en) * | 2020-07-31 | 2022-02-18 | 中国石油化工股份有限公司 | Fishing type falling-proof device and falling-proof device using same |
| CN114059951B (en) * | 2020-07-31 | 2024-04-26 | 中国石油化工股份有限公司 | Fishing type falling-preventing device and falling-preventing device using same |
| WO2022039762A1 (en) * | 2020-08-20 | 2022-02-24 | Saudi Arabian Oil Company | Assembly, retrieving device, and method for retrieving piping from a well |
| CN112112595A (en) * | 2020-09-30 | 2020-12-22 | 中国石油天然气集团有限公司 | Sealed fishing tool and fishing method |
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