CN108533202A - Coiled tubing cuts unfreezing fishing device - Google Patents
Coiled tubing cuts unfreezing fishing device Download PDFInfo
- Publication number
- CN108533202A CN108533202A CN201810457693.5A CN201810457693A CN108533202A CN 108533202 A CN108533202 A CN 108533202A CN 201810457693 A CN201810457693 A CN 201810457693A CN 108533202 A CN108533202 A CN 108533202A
- Authority
- CN
- China
- Prior art keywords
- outer sleeve
- guide shoe
- coiled tubing
- installation cavity
- slips
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/16—Grappling tools, e.g. tongs or grabs combined with cutting or destroying means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
- E21B29/007—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-retracting cutter rotating outside the pipe
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Marine Sciences & Fisheries (AREA)
- Fishing Rods (AREA)
Abstract
The present invention relates to drilling tool technical fields, specially a kind of coiled tubing cuts unfreezing fishing device, including top connection, outer sleeve and guide shoe, the lower part of top connection is fixedly connected with outer sleeve, the lower end of outer sleeve is fixedly connected with guide shoe, outer sleeve is internally provided with transparent installation cavity, the middle part of outer sleeve is equipped with the pin hole being connected with installation cavity, guide shoe is internally provided with the through-hole of vertical direction, the installation cavity upper end of outer sleeve is connected with top connection, and the lower end of outer sleeve is connected with the through-hole of guide shoe.Structure of the invention is reasonable and compact, it is easy to use, pass through the cooperation of slips and slip spider, slips can be effectively set to be fixed together with by card coiled tubing, the cooperation of cut ring and cutting ring seat can make cut ring that will be cut off by card division position by card coiled tubing, will quickly and effectively be taken out by the coiled tubing of card, the difficulty for reducing coiled tubing unfreezing saves the time of unfreezing.
Description
Technical field
The present invention relates to drilling tool technical fields, are a kind of coiled tubing cutting unfreezing fishing devices.
Background technology
With the popularization and popularization and application of coiled tubing underground work technology, more and more coiled tubings are applied to oil
Gas field underground work scene, however along with the extensive use of the operation technique, card is met in coiled tubing underground in operation process
The case where also happen occasionally.Since coiled tubing wall thickness itself is relatively thin, the relatively conventional tubing string of material is softer, tensile strength is smaller etc.
Characteristic, once underground occur and met card situation, the difficulty that unfreezing is carried out by coiled tubing itself is larger, and coiled tubing is caused to meet
Unfreezing is difficult after card, and time-consuming for unfreezing.
Invention content
The present invention provides a kind of coiled tubings to cut unfreezing fishing device, overcomes the deficiency of the above-mentioned prior art,
After underground chance card situation can effectively be solved, the difficulty that unfreezing is carried out by coiled tubing itself is larger, and coiled tubing is caused to meet card
Unfreezing is difficult afterwards, unfreezing the problem of time-consuming.
The technical scheme is that realized by following measures：A kind of coiled tubing cutting unfreezing fishing device,
Including top connection, the lower part of outer sleeve and guide shoe, top connection is fixedly connected with outer sleeve, and the lower end of outer sleeve, which is fixedly connected with, draws
Shoes, outer sleeve are internally provided with transparent installation cavity, and the middle part of outer sleeve is equipped with the pin hole being connected with installation cavity, guide shoe
It is internally provided with the through-hole of vertical direction, the installation cavity upper end of outer sleeve is connected with top connection, the lower end of outer sleeve and guide shoe
Through-hole is connected, and slips can be equipped with to the slips of contract, the lower inside of slips by being set on the top of outer sleeve installation cavity
The middle part of tooth, outer sleeve installation cavity is fixedly connected with slip spider, the lower outside and slips of slips by pin hole and shear pin
The upper inner of seat matches, and the installation cavity inner sleeve below slip spider is equipped with can be to the cut ring of contract, under cut ring
End inside is equipped with cutting edge, is fixedly connected with cutting ring seat in the installation cavity below cut ring, the lower outside of cut ring with
The upper inner of cutting ring seat matches, slip spider, cut ring and internal diameter of the internal diameter not less than slips for cutting ring seat.
Here is the further optimization and/or improvements to foregoing invention technical solution：
Above-mentioned slips includes slips lantern ring and at least two elastic card, and the lower end of slips lantern ring has at least three uniformly at intervals
Elastic card, the inside of elastic card is laid with circumferential slip insert, and the lower outside of elastic card is inside inclined-plane；
Or/and the middle part of slip sleeve is equipped with circumferential groove, the inside of shear pin is located in the circumferential groove of slip sleeve, the top of slip sleeve
Inside is up big and down small inner conical surface, and the upper inner of slip sleeve is matched with the inclined-plane of elastic card lower outside.
Above-mentioned cut ring includes cutting collar and at least three elasticity slice, and the lower end of cutting collar is equipped with uniformly at intervals
At least three elasticity slice, the lower end inside that elasticity is sliced are equipped with cutting edge, and the lower outside of elasticity slice is inwardly oblique
Face；Or/and the lower part of outer sleeve is laid at least two bolt hole, outer sleeve is fixed by stop screw and bolt hole
Cutting ring seat is installed, the upper inner for cutting ring seat is up big and down small inner conical surface, cuts the upper inner and elasticity of ring seat
The inclined-plane of slice lower outside matches.
Above-mentioned top connection is up big and down small, and the upper inner of top connection is equipped with internal thread, the lower outside of top connection with it is outer
It is fixed together on the inside of the upper end of sleeve, the lower end of top connection is formed with boss in the installation cavity of outer sleeve.
Above-mentioned guide shoe is up-small and down-big, and the lower end of guide shoe is downward elliptical arc surface, the upper outside and outer sleeve of guide shoe
Lower end inside be threadably secured and link together, the upper end of guide shoe is formed with boss in the installation cavity of outer sleeve.
Structure of the invention is reasonable and compact, easy to use, by the cooperation of slips and slip spider, can effectively make slips
It is fixed together with by card coiled tubing, the cooperation of cut ring and cutting ring seat can make cut ring will be by card coiled tubing
It is cut off by card division position, will quickly and effectively be taken out by the coiled tubing of card, reduce the difficulty of coiled tubing unfreezing, save and understand
The time of card.
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 slips in attached drawing 1.
Attached drawing 3 is the main view section view enlarged structure schematic diagram of cut ring in attached drawing 1.
Attached drawing 4 is the main view section view enlarged structure schematic diagram of slip spider in attached drawing 1.
Coding in attached drawing is respectively：1 is top connection, and 2 be outer sleeve, and 3 be guide shoe, and 4 be installation cavity, and 5 be slips, and 6 are
Slip insert, 7 be shear pin, and 8 be slip spider, and 9 be cut ring, and 10 is cut ring seat, and 11 be slips lantern ring, and 12 be elastic card
Piece, 13 be cutting collar, and 14 be elasticity slice, and 15 be cutting edge, and 16 be stop screw.
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 1,2, which cuts unfreezing fishing device, including top connection 1, outer sleeve 2 and guide shoe 3, above connects
First 1 lower part is fixedly connected with outer sleeve 2, and the lower end of outer sleeve 2 is fixedly connected with guide shoe 3, and outer sleeve 2 is internally provided with up and down
Penetrating installation cavity 4, the middle part of outer sleeve 2 are equipped with the pin hole being connected with installation cavity 4, and guide shoe 3 is internally provided with vertical direction
4 upper end of installation cavity of through-hole, outer sleeve 2 is connected with top connection 1, and the lower end of outer sleeve 2 is connected with the through-hole of guide shoe 3,
The top of 2 installation cavity 4 of outer sleeve, which is set with, to be laid with slip insert 6 to the slips 5 of contract, the lower inside of slips 5, outside
The middle part of 2 installation cavity 4 of sleeve is fixedly connected with slip spider 8, the lower outside and slips of slips 5 by pin hole and shear pin 7
The upper inner of seat 8 matches, and being set in the installation cavity 4 below slip spider 8 can be to the cut ring 9 of contract, cut ring 9
Lower end inside be equipped with cutting edge 15, cutting ring seat 10 is fixedly connected in the installation cavity 4 below cut ring 9, cut ring 9
Lower outside is matched with the upper inner of cutting ring seat 10, and the internal diameter of slip spider 8, cut ring 9 and cutting ring seat 10 is not less than
The internal diameter of slips 5.In this way, slips 5, slip spider 8, cut ring 9 and cutting ring seat 10 are public, at work, above connect
First 1 upper inner and the lower end of fishing string are fixed together, and coiled tubing is transferred to then as fishing string
Position on the top of the fish makes the top of fish of coiled tubing enter in guide shoe 3, and makes the top of fish of coiled tubing successively by movable fishing string
Across guide shoe 3, cutting ring seat 10, cut ring 9, slip spider 8, slips 5 and top connection 1 until the present invention needed for the coiled tubing
The target location cut, above carries fishing string at this time, the fish position for making slips 5 block coiled tubing and opposite shifting downwards
Dynamic, the lower part of slips 5 squeezes under the action of slip spider 8 to contract, and final slips 5 is tightly blocked continuously by slip insert 6
At the fish of oil pipe, the salvage of coiled tubing can be continued at this time, continue above to carry fishing string, slip spider 8 by
The downward effect stress of slips 5 increases, and final slip spider 8 cuts shear pin 7, and slips 5 and 8 entirety of slip spider glide and is pressed in
In cut ring 9, under downward pressure, the lower part and the top of cutting ring seat 10 of cut ring 9 interact cut ring 9, force
The lower part of cut ring 9 to contract, the cutting edge 15 of 9 lower end inside of cut ring under the action of radial pressure to coiled tubing into
Row from outside to inside cut, increasing with the promotion pulling force of fishing string, the cutting force of cut ring 9 is also increasingly
Greatly, until coiled tubing be cut off, continue thereafter with upper body fishing string, then can carry out by the well of cut end by card
Coiled tubing.
Above-mentioned coiled tubing cutting unfreezing fishing device can be made further optimization and/or improvements according to actual needs：
As shown in attached drawing 1,2, slips 5 includes the elastic card 12 of slips lantern ring 11 and at least two, the lower end of slips lantern ring 11
It is equipped at least three elastic card 12 uniformly at intervals, the inside of elastic card 12 is laid with circumferential slip insert 6, elastic card
The lower outside of piece 12 is inside inclined-plane；Or/and the middle part of slip sleeve 8 is equipped with circumferential groove, the inside of shear pin 7 is located at
In the circumferential groove of slip sleeve 8, the upper inner of slip sleeve 8 is up big and down small inner conical surface, upper inner and the elasticity of slip sleeve 8
The inclined-plane of 12 lower outside of card matches.In this way, the elastic card 12 that 11 lower end of slips lantern ring is uniformly arranged can be effective
Make the lower part of slips 5 to contract, the inner conical surface of 8 upper inner of inclined-plane and slip sleeve of the lower outside of elastic card 12 can be with
Effectively make to match between slips 5 and slip spider 8.
As shown in attached drawing 1,2, cut ring 9 includes the elasticity slice 14 of cutting collar 13 and at least three, cutting collar 13
Lower end uniformly at intervals be equipped at least three elasticity slice 14, elasticity slice 14 lower end inside be equipped with cutting edge 15, elasticity
The lower outside of slice 14 is inside inclined-plane；Or/and the lower part of outer sleeve 2 is laid at least two bolt hole, housing
Cylinder 2 is installed with cutting ring seat 10 by stop screw 16 and bolt hole, and the upper inner of cutting ring seat 10 is up big and down small
Inner conical surface, cut ring seat 10 upper inner with elasticity be sliced 14 lower outsides inclined-plane match.In this way, cutting collar 13
The uniformly distributed elasticity slice 14 in lower end can effectively make the lower part of cut ring 9 to contract, and elasticity is sliced 14 lower outside
Inclined-plane and the inner conical surface for cutting 10 upper inner of ring seat can effectively make to match between cut ring 9 and cutting ring seat 10.
As shown in attached drawing 1,2, top connection 1 is up big and down small, and the upper inner of top connection 1 is equipped with internal thread, top connection 1
It is fixed together on the inside of the upper end of lower outside and outer sleeve 2, the lower end of top connection 1 shape in the installation cavity 4 of outer sleeve 2
At there is boss.In this way, the internal thread of 1 upper inner of top connection can be effectively fixed together with fishing string, above connect
The boss that first 1 lower end is formed in the installation cavity 4 of outer sleeve 2 can limit the position that slips 5 moves up, and effectively prevent card
Watts 5 detach from the top connection 1 of the present invention, ensure that the stability of the present invention.
As shown in Fig. 1, guide shoe 3 is up-small and down-big, and the lower end of guide shoe 3 is downward elliptical arc surface, outside the top of guide shoe 3
The lower end inside of side and outer sleeve 2, which is threadably secured, to link together, the upper end of guide shoe 3 shape in the installation cavity 4 of outer sleeve 2
At there is boss.
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：The lower end of top connection 1 and metering fishing string is fixed when use and is pacified
It is fitted together, then carries out in the steps below：
It determines Position on the top of the fish, measures the length of fishing string and coiled tubing of the present invention cutting unfreezing fishing device, group is installed
Coiled tubing of the present invention cutting unfreezing fishing device after is with fishing string G.I.H, until pipe is salvaged in Position on the top of the fish activity
Top of fish is introduced guide shoe 3, and transfers fishing string certain position by column, and top of fish is made to sequentially pass through cutting along the inner cavity of outer sleeve 2
Ring seat 10, cut ring 9, slip spider 8, slips 5 and top connection 1 are until the target that the present invention is cut needed for the coiled tubing
Position above carries fishing string at this time, is provided since the split-type elastic card 12 and slip insert 6 of slips 5 block fish for slips 5
Pretightning force, when upper lifting pipe post, slips 5 blocks fish and relatively moves downwards, the inner cone of slips 5 lower outside and slip spider 8
Face mutually squeezes, and forces slips 5 to contract, tightly blocks fish, completes to salvage.
Continue above to carry fishing string, slip spider 8 is increased by the downward effect stress of slips 5, since slip spider 8 is sheared
Pin 7 limits, and when the axial load of slip spider 8 is promoted to the shear strength of shear pin 7, shear pin 7 is cut, slips 5
It glides and is pressed in cut ring 9 with 8 entirety of slip spider, cut ring 9 is under downward pressure, the lower part of cut ring 9 and cut ring
The inner conical surface interaction of seat 10, forces the lower part of cut ring 9 to contract, the cutting edge 15 of 9 lower end inside of cut ring is in diameter
Cutting from outside to inside is carried out to coiled tubing under the action of to pressure, with fishing string promotion pulling force increasingly
Greatly, the cutting force of cut ring 9 is also increasing, until coiled tubing is cut off, continues thereafter with upper body fishing string, then can carry
Go out by the well of cut end by the coiled tubing of card.
Claims (9)
1. a kind of coiled tubing cuts unfreezing fishing device, it is characterised in that including top connection, outer sleeve and guide shoe, top connection
Lower part is fixedly connected with outer sleeve, and the lower end of outer sleeve is fixedly connected with guide shoe, and outer sleeve is internally provided with transparent peace
It behave affectedly, the middle part of outer sleeve is equipped with the pin hole being connected with installation cavity, and guide shoe is internally provided with the through-hole of vertical direction, outer sleeve
Installation cavity upper end is connected with top connection, and the lower end of outer sleeve is connected with the through-hole of guide shoe, on the top of outer sleeve installation cavity
Being set with can be to the slips of contract, and the lower inside of slips is equipped with slip insert, the middle part of outer sleeve installation cavity by pin hole and
Shear pin is fixedly connected with slip spider, and the lower outside of slips is matched with the upper inner of slip spider, below slip spider
Installation cavity inner sleeve equipped with can be to the cut ring of contract, the lower end inside of cut ring is equipped with cutting edge, below cut ring
Cutting ring seat is fixedly connected in installation cavity, the lower outside of cut ring is matched with the upper inner of cutting ring seat, slip spider,
The internal diameter of cut ring and cutting ring seat is not less than the internal diameter of slips.
2. coiled tubing according to claim 1 cuts unfreezing fishing device, it is characterised in that slips includes slips lantern ring
With at least three elastic card, there is at least two elastic card in the lower end of slips lantern ring uniformly at intervals, elastic card it is interior
Portion is laid with circumferential slip insert, and the lower outside of elastic card is inside inclined-plane；Or/and the middle part of slip sleeve is equipped with
The inside of circumferential groove, shear pin is located in the circumferential groove of slip sleeve, and the upper inner of slip sleeve is up big and down small inner conical surface,
The upper inner of slip sleeve is matched with the inclined-plane of elastic card lower outside.
3. coiled tubing according to claim 1 or 2 cuts unfreezing fishing device, it is characterised in that cut ring includes cutting
Lantern ring and at least three elasticity slice, the lower end of cutting collar is equipped at least three elasticity slice uniformly at intervals, and elasticity is cut
The lower end inside of piece is equipped with cutting edge, and the lower outside of elasticity slice is inside inclined-plane；Or/and the lower part of outer sleeve is uniformly distributed
Equipped at least two bolt hole, outer sleeve is installed with cutting ring seat by stop screw and bolt hole, cuts ring seat
Upper inner is up big and down small inner conical surface, and the upper inner for cutting ring seat is matched with the inclined-plane of elasticity slice lower outside.
4. coiled tubing according to claim 1 or 2 cuts unfreezing fishing device, it is characterised in that top connection be it is upper it is big under
Small, the upper inner of top connection is equipped with internal thread, and one is fixedly connected on the inside of the lower outside of top connection and the upper end of outer sleeve
It rises, the lower end of top connection is formed with boss in the installation cavity of outer sleeve.
5. coiled tubing according to claim 3 cuts unfreezing fishing device, it is characterised in that top connection be it is up big and down small,
The upper inner of top connection is equipped with internal thread, and connection is threadably secured on the inside of the lower outside of top connection and the upper end of outer sleeve
Together, the lower end of top connection is formed with boss in the installation cavity of outer sleeve.
6. coiled tubing according to claim 1 or 2 cuts unfreezing fishing device, it is characterised in that guide shoe be it is upper it is small under
Greatly, the lower end of guide shoe is downward elliptical arc surface, and the upper outside of guide shoe and the lower end inside of outer sleeve are threadably secured company
It is connected together, the upper end of guide shoe is formed with boss in the installation cavity of outer sleeve.
7. coiled tubing according to claim 3 cuts unfreezing fishing device, it is characterised in that guide shoe is up-small and down-big, is drawn
The lower end of shoes is downward elliptical arc surface, and the upper outside of guide shoe and the lower end inside of outer sleeve are threadably secured and are connected to one
It rises, the upper end of guide shoe is formed with boss in the installation cavity of outer sleeve.
8. coiled tubing according to claim 4 cuts unfreezing fishing device, it is characterised in that guide shoe is up-small and down-big, is drawn
The lower end of shoes is downward elliptical arc surface, and the upper outside of guide shoe and the lower end inside of outer sleeve are threadably secured and are connected to one
It rises, the upper end of guide shoe is formed with boss in the installation cavity of outer sleeve.
9. coiled tubing according to claim 5 cuts unfreezing fishing device, it is characterised in that guide shoe is up-small and down-big, is drawn
The lower end of shoes is downward elliptical arc surface, and the upper outside of guide shoe and the lower end inside of outer sleeve are threadably secured and are connected to one
It rises, the upper end of guide shoe is formed with boss in the installation cavity of outer sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810457693.5A CN108533202A (en) | 2018-05-14 | 2018-05-14 | Coiled tubing cuts unfreezing fishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810457693.5A CN108533202A (en) | 2018-05-14 | 2018-05-14 | Coiled tubing cuts unfreezing fishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108533202A true CN108533202A (en) | 2018-09-14 |
Family
ID=63477482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810457693.5A Pending CN108533202A (en) | 2018-05-14 | 2018-05-14 | Coiled tubing cuts unfreezing fishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108533202A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748317A (en) * | 2019-10-12 | 2020-02-04 | 中国石油天然气集团有限公司 | Coiled tubing sealed circulating stuck freeing device and coiled tubing sealed circulating stuck freeing method |
| CN110894776A (en) * | 2019-10-12 | 2020-03-20 | 中国石油天然气集团有限公司 | Coiled tubing shearer and coiled tubing shearing method |
| CN114293942A (en) * | 2021-12-31 | 2022-04-08 | 贵州高峰石油机械股份有限公司 | Coiled tubing salvages cover and mills integrative device of cutting |
| CN115628027A (en) * | 2022-12-19 | 2023-01-20 | 四川康克石油科技有限公司 | Mechanical external cutting tool for oil pipe |
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| CN208380537U (en) * | 2018-05-14 | 2019-01-15 | 中国石油天然气集团公司 | Coiled tubing cuts unfreezing fishing device |
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| CN201100111Y (en) * | 2007-09-29 | 2008-08-13 | 华北石油管理局 | Removable card tile bushing hoping and positioning wrecker |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748317A (en) * | 2019-10-12 | 2020-02-04 | 中国石油天然气集团有限公司 | Coiled tubing sealed circulating stuck freeing device and coiled tubing sealed circulating stuck freeing method |
| CN110894776A (en) * | 2019-10-12 | 2020-03-20 | 中国石油天然气集团有限公司 | Coiled tubing shearer and coiled tubing shearing method |
| CN114293942A (en) * | 2021-12-31 | 2022-04-08 | 贵州高峰石油机械股份有限公司 | Coiled tubing salvages cover and mills integrative device of cutting |
| CN114293942B (en) * | 2021-12-31 | 2023-06-27 | 贵州高峰石油机械股份有限公司 | Milling and cutting integrated device for coiled tubing salvaging sleeve |
| CN115628027A (en) * | 2022-12-19 | 2023-01-20 | 四川康克石油科技有限公司 | Mechanical external cutting tool for oil pipe |
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