CN208380539U - The integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing - Google Patents
The integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing Download PDFInfo
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- CN208380539U CN208380539U CN201820713649.1U CN201820713649U CN208380539U CN 208380539 U CN208380539 U CN 208380539U CN 201820713649 U CN201820713649 U CN 201820713649U CN 208380539 U CN208380539 U CN 208380539U
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- outer cylinder
- annular groove
- slips
- coiled tubing
- guide shoe
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Abstract
The utility model relates to underground unfreezing fishing technical field of tools, are a kind of integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing；It includes top connection, outer cylinder and guide shoe；It is fixedly installed togather on the inside of the lower outside of top connection and the upper end of outer cylinder, the lower end inside of outer cylinder and the upper outside of guide shoe are fixedly installed togather, successively being set with from top to bottom in the upper inner of outer cylinder can be to the slip system, slip sleeve, cartridge of contract, cutting pressure ring is connected with by the shear pin of at least one in the inside middle portion of outer cylinder, the lower end seat of cartridge is on the upper surface of cutting pressure ring.The utility model reasonable and compact in structure, it is easy to use, pass through being used cooperatively for top connection, outer cylinder, guide shoe, slip system, cartridge and shearing slip system, realize the purpose of collection circulation de-plugging, unfreezing, cutting and salvaging, have the characteristics that safe and reliable and success rate is high, operation is facilitated, is improved work efficiency, production cost is reduced.
Description
Technical field
It is that a kind of multifunctional comprehensive unfreezing fishing is continuously oily the utility model relates to underground unfreezing fishing technical field of tools
The integrated apparatus of pipe.
Background technique
As coiled tubing is in the popularization and popularization and application of petroleum gas underground field of operation, live in oil gas field
To while more applications, also fall, along with more and more continuous pipes are disconnected by the appearance of the down hole problems such as card.Due to mesh
The tool processing that preceding operation field is used for the processing of the complex situations such as coiled tubing unfreezing, salvaging is cumbersome, success rate is low, cannot expire
The demand of sufficient down hole problem.
Summary of the invention
The utility model provides a kind of integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing, overcomes above-mentioned
The deficiency of the prior art can effectively solve current operation field for the processing of the complex situations such as coiled tubing unfreezing, salvaging
The problem of tool processing is cumbersome, success rate is low, has been unable to meet down hole problem demand.
The technical solution of the utility model is realized by following measures: a kind of multifunctional comprehensive unfreezing fishing is continuous
The integrated apparatus of oil pipe, including top connection, outer cylinder and guide shoe；Fixed peace on the inside of the lower outside of top connection and the upper end of outer cylinder
Be fitted together, the lower end inside of outer cylinder and the upper outside of guide shoe are fixedly installed togather, outer cylinder upper inner from up to
Under be successively set with and can pass through at least one in the inside middle portion of outer cylinder to the slip system, slip sleeve, cartridge of contract
A shear pin is connected with cutting pressure ring, and the lower end seat of cartridge is on the upper surface of cutting pressure ring, in the lower part of outer cylinder
Inside is successively set with from top to bottom to shear the lower end of slip sleeve to the shearing slip system and shearing slip sleeve of contract
Seat is on the upper surface of guide shoe；The top and inside middle portion face of slip sleeve are inclined-plane wide at the top and narrow at the bottom, the lower end seat of slip system
On the upper inner face of slip sleeve, the top and inside middle portion face for shearing slip sleeve are inclined-plane wide at the top and narrow at the bottom, shear slips
The lower end seat of device is on the upper end medial surface of shearing slip sleeve.
Here is the further optimization and/or improvements to above-mentioned utility model technical solution:
Above-mentioned slip system includes slips ontology set, is fixedly connected at least three at the lower end interval of slips ontology set
Slips, is distributed with annular slip insert on the inside of slips, and the lower outside face of slips is inclined-plane wide at the top and narrow at the bottom, the lower part of slips
Lateral surface seat is on the upper inner face of slip sleeve.
Above-mentioned shearing slip system includes shearing slips ontology set, is fixedly connected at the lower end interval of shearing slips ontology set
There is at least three shearing slips, is equipped with shearing tooth in the lower end inside of shearing slips, it is upper for shearing the lower outside face of slips
The lower outside face seat of slips is sheared on the upper end medial surface of shearing slip sleeve in narrow inclined-plane under width.
The above-mentioned top in top connection is equipped with internal screw thread or/and external screw thread.
The above-mentioned upper outside in cartridge is equipped with the annular groove of at least one, is equipped with extremely in the inside middle portion of cartridge
Few one annular groove is equipped with the annular groove of at least one in the lower outside of cartridge.
The above-mentioned lower outside in top connection is equipped with lower installation annular groove, and the upper end of outer cylinder is fixedly mounted on the lower peace of top connection
It fills in annular groove；It is equipped with upper installation annular groove in the upper outside of guide shoe, the lower end of outer cylinder is fixedly mounted on the upper installation annular groove of guide shoe
It is interior.
Above-mentioned top connection and outer cylinder, which are threadably secured, to be installed together, and outer cylinder and guide shoe are threadably secured and are mounted on one
It rises.
The utility model reasonable and compact in structure, it is easy to use, pass through top connection, outer cylinder, guide shoe, slip system, sealing
Packing element is used cooperatively with shearing slip system, realizes the purpose of collection circulation de-plugging, unfreezing, cutting and salvaging, can with safety
By the feature high with success rate, operation is facilitated, is improved work efficiency, production cost is reduced.
Detailed description of the invention
Attached drawing 1 is the main view half section schematic of the best embodiment of the utility model.
Attached drawing 2 is the main view section view enlarged structure schematic diagram of slip system in attached drawing 1.
Attached drawing 3 is the main view section view enlarged structure schematic diagram of slip sleeve in attached drawing 1.
Attached drawing 4 is the main view section view enlarged structure schematic diagram of cartridge in attached drawing 1.
Attached drawing 5 is the main view section view enlarged structure schematic diagram that slip sleeve is sheared in attached drawing 1.
Attached drawing 6 is the main view section view enlarged structure schematic diagram that slip system is sheared in attached drawing 1.
Coding in attached drawing is respectively as follows: 1 for top connection, and 2 be outer cylinder, and 3 be guide shoe, and 4 be slip sleeve, and 5 be cartridge, and 6
It is cutting pressure ring for shear pin, 7,8 be shearing slip sleeve, and 9 be slips ontology set, and 10 be slips, and 11 be slip insert, and 12 be to cut
Slips ontology set is cut, 13 be shearing slips, and 14 be shearing tooth, and 15 be annular groove, and 16 be lower installation annular groove, and 17 be upper installation annular groove.
Specific embodiment
The utility model is not limited by following embodiments, can technical solution according to the present utility model and actual conditions
Determine specific embodiment.
In the present invention, for ease of description, the description of the relative positional relationship of each component is according to specification
The Butut mode of attached drawing 1 is described, such as: front, rear, top, and bottom, left and right positional relationship be according to Figure of description 1
Butut direction determine.
The utility model is further described below with reference to examples and drawings:
As shown in attached drawing 1,2,3,4,5,6, the integrated apparatus of the multifunctional comprehensive unfreezing fishing coiled tubing includes upper
Connector 1, outer cylinder 2 and guide shoe 3；It is fixedly installed togather on the inside of the lower outside of top connection 1 and the upper end of outer cylinder 2, under outer cylinder 2
The upper outside of end inside and guide shoe 3 is fixedly installed togather, and being successively set with from top to bottom in the upper inner of outer cylinder 2 can
To the slip system, slip sleeve 4, cartridge 5 of contract, pass through the shear pin 6 of at least one in the inside middle portion of outer cylinder 2
Be connected with cutting pressure ring 7, the lower end seat of cartridge 5 on the upper surface of cutting pressure ring 7, outer cylinder 2 lower inside from upper
Successively being set under can draw to the shearing slip system and shearing slip sleeve 8 of contract, the lower end seat of shearing slip sleeve 8
On the upper surface of shoes 3；The top and inside middle portion face of slip sleeve 4 are inclined-plane wide at the top and narrow at the bottom, and the lower end seat of slip system is in card
Watt set 4 upper inner face on, shear slip sleeve 8 top and inside middle portion face be inclined-plane wide at the top and narrow at the bottom, shearing slips dress
The lower end seat set is on the upper end medial surface of shearing slip sleeve 8.Guide shoe 3 is public；In this way, by top connection 1, outer cylinder 2,
Guide shoe 3, slip system, cartridge 5 and shearing slip system are used cooperatively, and are realized the de-plugging of collection circulation, unfreezing, cutting and are beaten
The purpose of fishing has the characteristics that safe and reliable and success rate is high, facilitates operation, improve work efficiency, reduce and be produced into
This.
The integrated apparatus of above-mentioned multifunctional comprehensive unfreezing fishing coiled tubing can be made further excellent according to actual needs
Change or/and improve:
As shown in attached drawing 1,2, slip system includes slips ontology set 9, is fixedly connected at the lower end interval of slips ontology set 9
There is at least three slips 10, annular slip insert 11 is distributed in the inside of slips 10, the lower outside face of slips 10 is upper width
Under narrow inclined-plane, the lower outside face seat of slips 10 is on the upper inner face of slip sleeve 4.Under the top of slips ontology set 9 is thick
Portion is thin.Top connection 1 and the lower end of metering fishing string are fixedly installed togather when use, in this way, implementing the finger catcher of fish
When holding, top of fish is made to pass through slips 10 along the inner cavity of outer cylinder 2；Fishing string is above slowly steadily mentioned at this time, by slips 10 itself
Elastic force grasps fish and provides initial pretightening force, and when above mentioning fishing string, the annular slip insert 11 of 10 inside of slips is then grasped
Firmly fish outer wall and move down 2 inner cavity of outer cylinder is axially opposed.
As shown in attached drawing 1,6, shearing slip system includes shearing slips ontology set 12, under shearing slips ontology set 12
End interval is fixedly connected at least three shearing slips 13, is equipped with shearing tooth 14, shearing in the lower end inside of shearing slips 13
The lower outside face of slips 13 is inclined-plane wide at the top and narrow at the bottom, shears the lower outside face seat of slips 13 in the upper of shearing slip sleeve 8
It holds on medial surface.Shear the top thickness bottom thin of slips ontology set 12.By the lower end of top connection 1 and metering fishing string when use
It is fixedly installed togather, in this way, being cut when implementing to be cut salvaging outside card coiled tubing pipe when cutting pressure ring 7 reaches to lower stress
When cutting the shearing force of pin 6, shear pin 6 is cut, and cutting pressure ring 7, cartridge 5, slip sleeve 4 and slip system exist together
2 inner cavity of outer cylinder moves down dynamic pressure along axial direction and covers shearing slips 13, and the conical surface is shunk by shearing 8 medial surface of slip sleeve in shearing 13 lower part of slips
Extruding and shrink the shearing slips 13 of splitted structure radially-inwardly, shear slips 13 on shearing tooth 14 act on it is salvaged
Coiled tubing implements shearing.
As shown in Fig. 1, internal screw thread or/and external screw thread are equipped on the top of top connection 1.In this way, being convenient for the peace of top connection 1
Assembly and disassembly.
As shown in attached drawing 1,4, it is equipped with the annular groove 15 of at least one in the upper outside of cartridge 5, in cartridge 5
Inside middle portion is equipped with the annular groove 15 of at least one, is equipped with the annular groove 15 of at least one in the lower outside of cartridge 5.In this way,
Top annular groove 15, middle part annular groove 15 and lower part annular groove 15 are convenient for 5 stress compressional deformation of cartridge, to play the effect of sealing
Fruit.
As shown in Fig. 1, it is equipped with lower installation annular groove 16 in the lower outside of top connection 1, the upper end of outer cylinder 2 is fixedly mounted on
In the lower installation annular groove 16 of top connection 1；It is equipped with upper installation annular groove 17 in the upper outside of guide shoe 3, the lower end of outer cylinder 2 is fixedly mounted
In the upper installation annular groove 17 of guide shoe 3.
As shown in Fig. 1, top connection 1 and outer cylinder 2 are threadably secured and are installed together, and outer cylinder 2 and guide shoe 3 pass through screw thread
It is fixedly installed togather.In this way, convenient for the installation and removal between top connection 1 and outer cylinder 2；The peace installation and dismantling of outer cylinder 2 and guide shoe 3
It unloads.
The above technical characteristic constitutes the most preferred embodiment of the utility model, with stronger adaptability and best implementation
Effect can increase and decrease non-essential technical characteristic, according to actual needs to meet the needs of different situations.
The use process of the best embodiment of the utility model: top connection 1 and the lower end of metering fishing string are consolidated when use
Dingan County is fitted together, and is then carried out in the steps below:
1. implementing the salvaging grasping of fish
It determines Position on the top of the fish, measures the one of fishing string and the utility model multifunctional comprehensive unfreezing fishing coiled tubing
Disguise the length set, by the integrated apparatus for the utility model multifunctional comprehensive unfreezing fishing coiled tubing being completed and beats
Tubing string G.I.H is fished out, until Position on the top of the fish activity fishing string, introduces guide shoe 3 for top of fish, and transfer fishing string certain position,
Top of fish is set to pass through 10 inner cavity of slips along the inner cavity of outer cylinder 2；Fishing string is above slowly steadily mentioned at this time, by the bullet of slips 10 itself
Property power grasping fish and initial pretightening force is provided, when above mentioning fishing string, slips 10 then grasp fish outer wall and in outer cylinder 2
Chamber is axially opposed to be moved down；During slips 10 moves down, the slips 10 of splitted structure shrinks the conical surface by slip sleeve 4
The radially inward extruding of medial surface, the slips 10 of splitted structure, which is inwardly shunk, clamps salvaged coiled tubing, 10 inside of slips
Annular slip insert 11 be critical fish complete salvage grasping, above mention fishing string at this time, increasing productivity continues to increase.
Implement lifting type activity unfreezing fishing
Fishing string is above mentioned, is fallen in well if coiled tubing is disconnected without card, can directly propose in well disconnected falls coiled tubing；
If fish attempts the activity unfreezing of multiple put-on and delegated formula by card after completing salvaging grasping in well；Fishing string at this time
Increasing productivity must be strictly controlled in the parameter area of device requirement, and unfreezing success, which then above mentions fishing string and pulls out, to be fallen
Fish carries out subsequent step if unsuccessful.
Implement to be tightly connected, carries out huge discharge and recycle unfreezing fishing
After slips 10 grasps salvaged coiled tubing, slowly above mentions fishing string and apply certain increasing productivity, slips
10 and slip sleeve 4 squeeze cartridge 5 axially downward, make cartridge 5 occur flexible deformation；Due to the spy of cartridge 5
There is structure, 2 inner wall of outer cylinder is adjacent on the outside of the cartridge 5 for the deformation that is squeezed, inside is adjacent to by the outer wall of fishing coiled tubing, at this time
Continue the elastic deformation of holding cartridge 5 by keeping increasing productivity, then the company of fishing string and salvaged coiled tubing
It connects and is sealed.Continue to keep increasing productivity constant, keeps connection sealing, be pumped into fluid from ground at this time, fluid can then recycle
Extremely by the pipe shoe of fishing coiled tubing or bottom equipment, flushing or hot wash to huge discharge is carried out at stuck point.By to continuous in well
Oil pipe, equipment and stuck point carry out the circulation flushing of huge discharge, can effectively help to implement to by the de-plugging unfreezing of fishing coiled tubing,
Improve unfreezing success rate.If unfreezing success, can go up bailing and go out fish, if unfreezing is unsuccessful, can implement to stuck pipe column
Cutting is salvaged.
Implement to be cut salvaging outside card coiled tubing pipe
When to implementing cutting unfreezing fishing outside pipe by the continuous pipe of card, the utility model multifunctional comprehensive unfreezing is beaten first
The integrated apparatus of fishing coiled tubing is transferred to the target position that need to be cut；Above mention fishing string, slips 10 and slip sleeve 4
The grasping to salvaged coiled tubing is completed in cooperation, and continuation slowly above mentions fishing string, then 5 extrusion of cartridge, beats
It fishes out tubing string and realizes sealing with by fishing coiled tubing；Continue above to mention fishing string at this time, further increases increasing productivity, increasing productivity
It is transferred on cutting pressure ring 7 by slip sleeve 4 and cartridge 5, continues to be slowly increased increasing productivity, cut pressure ring 7 along axial direction
Downward is further increased by pressure.When cutting pressure ring 7 reaches the shearing force of shear pin 6 to lower stress, 6 quilt of shear pin
It cuts, cutting pressure ring 7, cartridge 5, slip sleeve 4 and slip system move down dynamic pressure along axial direction in 2 inner cavity of outer cylinder together and cover shearing
Slips 13, the conical surface is shunk in shearing 13 lower part of slips is made the shearing slips of splitted structure by the extruding of shearing 8 medial surface of slip sleeve
13 radially-inwardly shrink, and shear the shearing tooth 14 on slips 13 and act on salvaged coiled tubing, implement shearing；Shear slips 13
On shearing tooth 14 it is directly proportional to increasing productivity, continue above to mention fishing string and increase increasing productivity until being cut by fishing coiled tubing
It is disconnected；Fishing string is above mentioned, the tubing string cut is salvaged.
Claims (14)
1. a kind of integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing, it is characterised in that including top connection, outer cylinder and
Guide shoe；Be fixedly installed togather on the inside of the upper end of the lower outside of top connection and outer cylinder, the lower end inside of outer cylinder and guide shoe it is upper
It is fixedly installed togather on the outside of portion, being successively set with from top to bottom in the upper inner of outer cylinder can fill to the slips of contract
It sets, slip sleeve, cartridge, cutting pressure ring is connected with by the shear pin of at least one in the inside middle portion of outer cylinder, seal
The lower end seat of packing element is successively set with can inwardly receive from top to bottom on the upper surface of cutting pressure ring in the lower inside of outer cylinder
The shearing slip system and shearing slip sleeve of contracting, shear the lower end seat of slip sleeve on the upper surface of guide shoe；The top of slip sleeve
It is inclined-plane wide at the top and narrow at the bottom with inside middle portion face, the lower end seat of slip system shears slips on the upper inner face of slip sleeve
The top and inside middle portion face of set are inclined-plane wide at the top and narrow at the bottom, shear the lower end seat of slip system in the upper end of shearing slip sleeve
On side.
2. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 1, it is characterised in that card
Watt device includes slips ontology set, at least three slips is fixedly connected at the lower end interval of slips ontology set, in slips
Annular slip insert is distributed in inside, and the lower outside face of slips is inclined-plane wide at the top and narrow at the bottom, and the lower outside face seat of slips is in card
Watt set upper inner face on.
3. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 1 or 2, it is characterised in that
Shearing slip system includes shearing slips ontology set, is fixedly connected at least three at the lower end interval of shearing slips ontology set
Slips to be sheared, is equipped with shearing tooth in the lower end inside of shearing slips, the lower outside face for shearing slips is inclined-plane wide at the top and narrow at the bottom,
The lower outside face seat of slips is sheared on the upper end medial surface of shearing slip sleeve.
4. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 1 or 2, it is characterised in that
The top of top connection is equipped with internal screw thread or/and external screw thread.
5. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 3, it is characterised in that on
The top of connector is equipped with internal screw thread or/and external screw thread.
6. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing, feature described according to claim 1 or 2 or 5
It is that the upper outside of cartridge is equipped with the annular groove of at least one, is equipped with the ring of at least one in the inside middle portion of cartridge
Slot is equipped with the annular groove of at least one in the lower outside of cartridge.
7. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 3, it is characterised in that close
The upper outside of sealing cylinder is equipped with the annular groove of at least one, is equipped with the annular groove of at least one in the inside middle portion of cartridge,
The lower outside of cartridge is equipped with the annular groove of at least one.
8. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 4, it is characterised in that close
The upper outside of sealing cylinder is equipped with the annular groove of at least one, is equipped with the annular groove of at least one in the inside middle portion of cartridge,
The lower outside of cartridge is equipped with the annular groove of at least one.
9. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing described according to claim 1 or 2 or 5 or 7 or 8,
It is characterized in that the lower outside of top connection is equipped with lower installation annular groove, the upper end of outer cylinder is fixedly mounted on the lower mounting ring of top connection
In slot；It is equipped with upper installation annular groove in the upper outside of guide shoe, the lower end of outer cylinder is fixedly mounted in the upper installation annular groove of guide shoe.
10. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 3, it is characterised in that on
The lower outside of connector is equipped with lower installation annular groove, and the upper end of outer cylinder is fixedly mounted in the lower installation annular groove of top connection；In guide shoe
Upper outside be equipped with upper installation annular groove, the lower end of outer cylinder is fixedly mounted in the upper installation annular groove of guide shoe.
11. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 4, it is characterised in that on
The lower outside of connector is equipped with lower installation annular groove, and the upper end of outer cylinder is fixedly mounted in the lower installation annular groove of top connection；In guide shoe
Upper outside be equipped with upper installation annular groove, the lower end of outer cylinder is fixedly mounted in the upper installation annular groove of guide shoe.
12. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 6, it is characterised in that on
The lower outside of connector is equipped with lower installation annular groove, and the upper end of outer cylinder is fixedly mounted in the lower installation annular groove of top connection；In guide shoe
Upper outside be equipped with upper installation annular groove, the lower end of outer cylinder is fixedly mounted in the upper installation annular groove of guide shoe.
13. the integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing according to claim 9, it is characterised in that on
Connector and outer cylinder, which are threadably secured, to be installed together, and outer cylinder and guide shoe are threadably secured and are installed together.
14. according to claim 10 or 11 or 12 or the multifunctional comprehensive unfreezing fishing coiled tubing integrated apparatus,
It is characterized in that top connection and outer cylinder are threadably secured and are installed together, outer cylinder and guide shoe are threadably secured and are mounted on one
It rises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820713649.1U CN208380539U (en) | 2018-05-14 | 2018-05-14 | The integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820713649.1U CN208380539U (en) | 2018-05-14 | 2018-05-14 | The integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208380539U true CN208380539U (en) | 2019-01-15 |
Family
ID=64970525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820713649.1U Active CN208380539U (en) | 2018-05-14 | 2018-05-14 | The integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208380539U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533203A (en) * | 2018-05-14 | 2018-09-14 | 中国石油天然气集团公司 | The integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing |
-
2018
- 2018-05-14 CN CN201820713649.1U patent/CN208380539U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533203A (en) * | 2018-05-14 | 2018-09-14 | 中国石油天然气集团公司 | The integrated apparatus of multifunctional comprehensive unfreezing fishing coiled tubing |
| CN108533203B (en) * | 2018-05-14 | 2024-02-23 | 中国石油天然气集团公司 | Multifunctional integrated device for unlocking and fishing coiled tubing |
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