CN111456667B - Salvaging device for large-caliber drilling tool on coal mine ground - Google Patents
Salvaging device for large-caliber drilling tool on coal mine ground Download PDFInfo
- Publication number
- CN111456667B CN111456667B CN202010408980.4A CN202010408980A CN111456667B CN 111456667 B CN111456667 B CN 111456667B CN 202010408980 A CN202010408980 A CN 202010408980A CN 111456667 B CN111456667 B CN 111456667B
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- sleeve
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- fixedly connected
- guide
- drill
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- 238000005553 drilling Methods 0.000 title claims abstract description 38
- 239000003245 coal Substances 0.000 title claims abstract description 10
- 230000009471 action Effects 0.000 abstract description 3
- 238000010079 rubber tapping Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 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
- E21B31/16—Grappling tools, e.g. tongs or grabs combined with cutting or destroying means
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Marine Sciences & Fisheries (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a salvaging device for a large-caliber drilling tool on the ground of a coal mine, which relates to the technical field of mine equipment and comprises a guide sleeve, wherein the guide sleeve is arranged in a horn-shaped structure, a plurality of rectangular through holes are formed in the circumferential surface of the guide sleeve, and arc-shaped supporting plates are arranged in the rectangular through holes; the upper end of the arc-shaped supporting plate is rotationally connected with the base and rotates along the radial direction, the arc-shaped supporting plate moves towards the center under the action of the driving device, the guide sleeve is fixedly connected with the base, the base is fixedly installed on the push rod, a male cone is arranged at the center of the base, the upper part of the male cone is fixedly connected with a rotating shaft of the second motor, a drilling tool sleeve is coaxially arranged below the male cone, when the drilling tool slides into the guide sleeve, the arc-shaped supporting plate rotates along the radial direction towards the center line under the action of the driving device and pushes the drilling tool to move towards the center, the centering of the drilling tool and the coaxiality of the drilling tool sleeve are realized, and the centering efficiency and coaxiality precision of the drilling tool are improved, so that the salvaging efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of mine equipment, and particularly relates to a fishing device for a large-caliber drilling tool on the ground of a coal mine.
Background
The large-caliber drilling well is increasingly widely applied in the fields of underground resource development, foundation engineering construction and treatment, underground industrial facility construction and the like at present. Because of the large self-weight, large torque and large aperture of the formed bare hole of the large-caliber drilling tool, once the drilling tool is unqualified in quality, the drilling tool is tired, the rotation speed and the drilling pressure are controlled unreasonably in the drilling process, the drilling tool fracture accidents such as drill rods and drill collars are easy to occur, and meanwhile, the drilling tool is difficult to trace and salvage because of the large aperture and easy inclination.
Chinese patent CN208918498U discloses a fishing device for a drop drill collar in heavy caliber drilling, comprising a hollow sleeve, a conical sleeve and a centralizing sleeve; the bottom end of the hollow sleeve is fixedly connected with the top end of the conical sleeve, and the bottom end of the conical sleeve is fixedly connected with the top end of the centralizing sleeve; the hollow sleeve, the conical sleeve and the centralizing sleeve are coaxially arranged; the hollow sleeve top is equipped with the screw thread, and hollow sleeve inside is equipped with the public awl of vertical downward setting, and public awl and hollow sleeve coaxial setting. According to the fishing device for the falling drilling collar in the large-caliber drilling, through the hollow sleeve, the conical sleeve and the centralizing sleeve which are coaxially and sequentially connected, the drilling tool which breaks and inclines in the large-caliber drilling can be quickly fished by matching with the male cone, the rectangular opening and the semicircular opening, and the fishing device has the characteristics of convenience in operation and reliability in performance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a salvaging device for a large-caliber drilling tool on the ground of a coal mine, so as to solve the problems in the prior art.
The aim of the invention can be achieved by the following technical scheme: the large-caliber drilling tool salvaging device for the coal mine ground comprises a guide sleeve, wherein the guide sleeve is arranged in a horn-shaped structure, a plurality of rectangular through holes are formed in the circumferential surface of the guide sleeve, and an arc-shaped supporting plate is arranged in each rectangular through hole;
the guide-in sleeve upper end is provided with the base, guide-in sleeve and base fixed connection, the mounting groove has been set up on the base below cylinder, arc backup pad rotates with the mounting groove to be connected.
Preferably, a male cone is arranged in the central round hole of the base, the upper part of the male cone is fixedly connected with the rotating shaft of the second motor, and the second motor base is fixedly connected with the base.
Preferably, a chute is arranged on the outer circumferential surface of the arc-shaped supporting plate, a sliding support is arranged in the chute, the sliding support is in sliding connection with the arc-shaped supporting plate, a connecting rod is arranged on the sliding support, and the connecting rod is in rotary connection with the sliding support.
Preferably, the connecting rod is in sliding connection with the base, a guide chute is formed in the base, the connecting rod is installed in the guide chute, a first support is arranged at the upper end of the base, a connecting rod fixing seat is arranged on the bottom surface of the first support, and the upper end of the connecting rod is embedded and installed in the connecting rod fixing seat and is fixedly connected through a fastening bolt.
Preferably, a first cylinder is arranged below the first bracket, the first cylinder base is fixedly connected with the first bracket, and the first cylinder piston rod is fixedly connected with the lower base.
Preferably, the center of the leading-in sleeve is coaxially provided with a drill rod sleeve, the leading-in sleeve of the drill rod sleeve is welded and fixed, the inner diameter of the drill rod sleeve is consistent with the outer diameter of a broken drill rod, and the lower section of the drill rod sleeve is provided with a wide mouth.
Preferably, a drill sleeve is arranged below the drill rod sleeve and fixedly connected with the inner wall of the guide-in sleeve, a drill bit is arranged in the drill sleeve, and the left end of the drill bit is fixedly connected with the first motor.
Preferably, the left end of the first motor is fixedly connected with a piston rod of the second cylinder, the base of the second cylinder is fixedly connected with the second bracket, and the second bracket is fixedly installed with the guide-in sleeve.
Preferably, the outer diameter of the wide mouth at the lower end of the introducing sleeve is consistent with the aperture of the mine.
Preferably, at least two first infrared cameras are arranged on the bottom surface of the base, at least two second infrared cameras are arranged on the upper top surface inside the guide-in sleeve, and the length of each second infrared camera does not exceed the length of the drill rod sleeve.
The invention has the beneficial effects that:
1. The guide sleeve is provided with a plurality of groups of arc-shaped supporting plates in a circumferential array manner, when the drilling tool slides into the guide sleeve, the arc-shaped supporting plates move towards the central line under the action of the driving device to push the drilling tool to move towards the center, so that the centering and the coaxial alignment of the drilling tool sleeve are realized, the centering efficiency and the coaxial precision of the drilling tool are improved, and the fishing efficiency is improved.
2. The drill bushing is radially arranged on the side surface of the guide-in sleeve, and the drill bit is utilized to reverse through radial drilling on the circumferential surface of the drilling tool, so that the stability of connection between the drilling tool and the base is improved.
3. Be provided with infrared camera on leading-in sleeve and base, be convenient for observe the inside condition of mine, improved the convenience for salvage work, improved salvage efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is a schematic view of the structure of the support bar of the present invention;
FIG. 4 is a schematic view of the structure of the fixing rod of the present invention;
In the figure: the device comprises a first bracket-1, a first cylinder-2, a connecting rod fixing seat-3, a fastening bolt-4, a connecting rod-5, a guiding chute-6, a sliding support-7, an arc-shaped supporting plate-8, a chute-9, a driving rod-10, a base-11, a second bracket-12, a second cylinder-13, a first motor-14, a drill bit-15, a guiding sleeve-16, a rectangular through hole-17, a drill bushing-18, a male cone-19, a second motor-20, a drill rod sleeve-21, a first infrared camera-22, a mounting groove-23 and a second infrared camera-24.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1 to 4, in embodiment 1 of the present invention, a fishing device for a large-caliber drilling tool on a coal mine floor comprises a guide sleeve 16, wherein the guide sleeve 16 is provided with a horn-shaped structure, a plurality of rectangular through holes 17 are formed in the circumferential surface of the guide sleeve 16, and an arc-shaped supporting plate 8 is arranged in the rectangular through holes 17; the guide-in sleeve 16 upper end is provided with base 11, guide-in sleeve 16 and base 11 fixed connection, be provided with mounting groove 23 on the cylinder of base 11 below, arc backup pad 8 and mounting groove 23 rotate to be connected, base 11 and actuating lever 10 fixed connection, go on the up-and-down motion along the mine under the drive of actuating lever 10 to can rotate along with actuating lever 10.
When the drill rod is in operation, the driving rod 10 is started to rotate downwards, the guide sleeve 16 is arranged in a horn shape, the inner wall of the guide sleeve 16 is contacted with the outer circumferential surface of the drill rod downwards, then the guide sleeve slides along the inner wall of the guide sleeve 16, when the drill rod enters the inner side of the guide sleeve 16 for half, the driving rod 10 stops downwards, the arc-shaped supporting plate 8 is driven to rotate towards the middle through the driving device, and the arc-shaped supporting plate 8 pushes the drill rod to be gradually righted towards the center position.
As shown in fig. 2, a male cone 19 is arranged in a central round hole of the base 11, the upper part of the male cone 19 is fixedly connected with a rotating shaft of a second motor 20, the base of the second motor 20 is fixedly connected with the base 11, the male cone 19 is driven to rotate through the second motor 20, after a drill rod in a well is straightened, the male cone 19 is used for tapping the upper top end of the drill rod, and the male cone 19 is fixedly connected with the drill rod through threads, so that the drill rod is brought from a mine.
As shown in fig. 1, a chute 9 is arranged on the outer circumferential surface of an arc-shaped supporting plate 8, a sliding support 7 is arranged in the chute 9, the sliding support 7 is in sliding connection with the arc-shaped supporting plate 8, and the sliding support 7 slides in the chute 9 to drive the chute 9 to rotate; the sliding support 7 is provided with a connecting rod 5, the connecting rod 5 is rotationally connected with the sliding support 7, and the connecting rod 5 moves up and down along the vertical direction; the base 11 is provided with a guide chute 6, the connecting rod 5 is arranged in the guide chute 6 and slides in the guide chute 6, and the guide chute 6 plays a role in limiting and guiding; the base 11 upper end is provided with first support 1, is provided with connecting rod fixing base 3 in first support 1 bottom surface, inserts connecting rod 5 upper end in the connecting rod fixing base 3 to carry out fixed connection through fastening bolt 4, slide about controlling connecting rod 5 along direction spout 6 promptly, drive sliding support 7 slides in spout 9, drives opening and shutting of arc backup pad 8.
The telescopic operation of the first air cylinder 2 drives the first bracket 1 to move up and down, so that the connecting rod 5 is driven to move up and down vertically.
As shown in fig. 2, the drill rod sleeve 21 is disposed on the guide sleeve 16, the inner diameter of the drill rod sleeve 21 is consistent with the outer diameter of the broken drill rod, the lower section of the drill rod sleeve 21 is set to be wide-mouth, after the drill rod is righted, the driving rod is moved downwards, the broken drill rod is connected with the drill rod sleeve 21 in a matched manner, the male cone is convenient to tap, and the lower end of the drill rod sleeve 21 is set to be wide-mouth so that the drill rod is easier to align and install in a matched manner.
Example 2
In embodiment 2 of the present invention, as shown in the second cylinder 13, a drill sleeve 18 is disposed below the drill rod sleeve 21, the drill sleeve 18 is fixedly connected with the inner wall of the guiding sleeve 16, a drill bit 15 is disposed in the drill sleeve 18, and the left end of the drill bit 15 is fixedly connected with the first motor 14; the left end of the first motor 14 is fixedly connected with a piston rod of the second cylinder 13, the base of the second cylinder 13 is fixedly connected with the second bracket 12, the second bracket 12 is fixedly installed with the guide sleeve 16, the drill rod is basically fixed with the salvaging device after tapping, the first motor 14 is started to work, the drill bit 15 is driven to rotate, the second cylinder 13 is started, the circumferential surface of the drill rod is drilled through the guide of the drill sleeve 18, after not less than 2cm is drilled, the second cylinder 13 and the first motor 14 are stopped, the drill bit 15 is kept in the drill rod, the drill rod can be limited to prevent the drill rod from rotating to fall off, the stability of the connection between the drill rod and the base 11 is improved, and a certain load is born.
The outer diameter of the wide-mouth at the lower end of the guide sleeve 16 is consistent with the aperture of the mine, and the drill rod is inclined against the inner wall of the mine after being broken, so that when the outer diameter of the wide-mouth of the guide sleeve 16 is consistent with the aperture of the mine, the guide sleeve 16 can be ensured to bring the drill rod into the guide sleeve 16 in the downward moving process.
As shown in fig. 2 and 4, at least two first infrared cameras 22 are disposed on the bottom surface of the base 11, at least two second infrared cameras 24 are disposed on the upper top surface inside the guiding sleeve 16, the length of the second infrared cameras 24 does not exceed the length of the drill pipe sleeve 21, and the first infrared cameras 22 and the second infrared cameras 24 are mainly used for conveniently observing the conditions in the mine, so that the working efficiency is improved.
The working principle of the invention is as follows: the driving rod 10 is driven to move downwards, the base 11 is driven to move downwards, the leading-in sleeve 16 moves downwards to extrude a drill rod into the leading-in sleeve 16, the first cylinder 2 is started to shrink, the first bracket 1 moves downwards, the connecting rod 5 is driven to move downwards, the connecting rod 5 drives the sliding support 7 to slide along the sliding groove 9, the arc-shaped supporting plate 8 is driven to rotate inwards, the drill rod is driven to move towards the middle and be righted, the driving rod 10 is started to continue to move downwards, the drill rod enters the drill rod sleeve 21, the second motor 20 is started to rotate, the male cone 19 is used for tapping the end face of the drill rod, the driving rod 10 is stopped to move downwards after tapping, the second cylinder 13 and the first motor 14 are started, the drill bit 15 is used for drilling the drill rod, the second cylinder 13 and the first motor 14 are stopped to work after drilling, the drill bit 15 is kept in the drill rod, the anti-rotation and limiting functions are achieved, meanwhile, part of load can be carried when the drill rod is lifted, the driving rod 10 is driven to move upwards, the base 11 is driven to move upwards, and the drill rod is salvaged out of a mine.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "bottom", "vertical", "horizontal", and the like indicate orientations or positional relationships as shown based on the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured or operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it is possible to provide a device for the treatment of a disease. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "a number" is two or more, unless explicitly defined otherwise.
It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes, substitutions and modifications which come within the spirit and principle of the invention are therefore intended to be embraced therein.
Claims (3)
1. The large-caliber drilling tool salvaging device for the coal mine ground comprises a guide sleeve (16), and is characterized in that the guide sleeve (16) is of a horn-shaped structure, a plurality of rectangular through holes (17) are formed in the circumferential surface of the guide sleeve (16), and an arc-shaped supporting plate (8) is arranged in each rectangular through hole (17);
the upper end of the guide-in sleeve (16) is provided with a first base (11), the guide-in sleeve (16) is fixedly connected with the first base (11), a mounting groove (23) is formed in a cylinder below the first base (11), the arc-shaped supporting plate (8) is rotationally connected with the mounting groove (23), and the first base (11) is fixedly connected with the driving rod (10);
A male cone (19) is arranged in the central round hole of the first base (11), the upper part of the male cone (19) is fixedly connected with the rotating shaft of the second motor (20), and the base of the second motor (20) is fixedly connected with the first base (11);
a sliding groove (9) is formed in the outer circumferential surface of the arc-shaped supporting plate (8), a sliding support (7) is installed in the sliding groove (9), the sliding support (7) is in sliding connection with the arc-shaped supporting plate (8), a connecting rod (5) is arranged on the sliding support (7), and the connecting rod (5) is in rotary connection with the sliding support (7);
The connecting rod (5) is in sliding connection with the first base (11), a guide chute (6) is formed in the first base (11), the connecting rod (5) is installed in the guide chute (6), a first support (1) is arranged at the upper end of the first base (11), a connecting rod fixing seat (3) is arranged on the bottom surface of the first support (1), and the upper end of the connecting rod (5) is embedded and installed in the connecting rod fixing seat (3) and fixedly connected through a fastening bolt (4);
A first air cylinder (2) is arranged below the first bracket (1), the base of the first air cylinder (2) is fixedly connected with the first bracket (1), and a piston rod of the first air cylinder (2) is fixedly connected with a first base (11) below;
a drill sleeve (18) is arranged below the drill rod sleeve (21), the drill sleeve (18) is fixedly connected with the inner wall of the guide-in sleeve (16), a drill bit (15) is arranged in the drill sleeve (18), and the left end of the drill bit (15) is fixedly connected with the first motor (14);
the left end of the first motor (14) is fixedly connected with a piston rod of a second cylinder (13), the base of the second cylinder (13) is fixedly connected with a second bracket (12), and the second bracket (12) is fixedly arranged with an introduction sleeve (16);
the drill rod sleeve (21) is coaxially arranged at the center of the guide-in sleeve (16), the guide-in sleeve (16) of the drill rod sleeve (21) is fixedly welded, the inner diameter of the drill rod sleeve (21) is consistent with the outer diameter of a broken drill rod, and the lower section of the drill rod sleeve (21) is wide in mouth.
2. A fishing device for large-caliber drilling tools on the ground of a coal mine according to claim 1, wherein the outer diameter of a wide mouth at the lower end of the guide sleeve (16) is consistent with the aperture of the mine.
3. The fishing device for the large-caliber drilling tool on the coal mine ground according to claim 1, wherein at least two first infrared cameras (22) are arranged on the bottom surface of the first base (11), at least two second infrared cameras (24) are arranged on the upper top surface inside the guide-in sleeve (16), and the length of each second infrared camera (24) does not exceed the length of the drill rod sleeve (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010408980.4A CN111456667B (en) | 2020-05-14 | 2020-05-14 | Salvaging device for large-caliber drilling tool on coal mine ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010408980.4A CN111456667B (en) | 2020-05-14 | 2020-05-14 | Salvaging device for large-caliber drilling tool on coal mine ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111456667A CN111456667A (en) | 2020-07-28 |
| CN111456667B true CN111456667B (en) | 2024-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010408980.4A Active CN111456667B (en) | 2020-05-14 | 2020-05-14 | Salvaging device for large-caliber drilling tool on coal mine ground |
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| Country | Link |
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| CN (1) | CN111456667B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113294099A (en) * | 2021-06-23 | 2021-08-24 | 中勘资源勘探科技股份有限公司 | Large-diameter drill bit centering device |
| CN115450571B (en) * | 2022-10-12 | 2025-02-21 | 山东方大工程有限责任公司 | Drilling stabilizing device of hydraulic drilling machine for coal mine excavation and application method of drilling stabilizing device |
| CN115584930A (en) * | 2022-10-28 | 2023-01-10 | 重庆市水利电力建筑勘测设计研究院有限公司 | A kind of hydraulic drilling equipment |
| CN115591996B (en) * | 2022-12-15 | 2023-03-21 | 西南石油大学 | Punch forming equipment and punch forming method for drilling tool centralizing body |
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| CN212454343U (en) * | 2020-05-14 | 2021-02-02 | 中勘资源勘探科技股份有限公司 | Be used for colliery ground heavy-calibre drilling tool fishing device |
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| US3552507A (en) * | 1968-11-25 | 1971-01-05 | Cicero C Brown | System for rotary drilling of wells using casing as the drill string |
| US8235104B1 (en) * | 2008-12-17 | 2012-08-07 | T&T Engineering Services, Inc. | Apparatus for pipe tong and spinner deployment |
| EP2770157A1 (en) * | 2013-02-26 | 2014-08-27 | Bauer Spezialtiefbau GmbH | Drilling tool and method for drilling in soil |
| CN205117268U (en) * | 2015-08-27 | 2016-03-30 | 淮北矿业（集团）勘探工程有限责任公司 | A fishing device for well drilling well casing |
| CN105649565A (en) * | 2016-03-30 | 2016-06-08 | 中煤特殊凿井有限责任公司 | Drilling tool salvaging device |
| CN205840834U (en) * | 2016-07-22 | 2016-12-28 | 国家安全生产监督管理总局信息研究院 | Hydraulic oil cylinder type drilling rod marine salvage equipment |
| CN207761614U (en) * | 2018-01-07 | 2018-08-24 | 霍其国 | A kind of brill milling formula fishing tap |
| CN208203197U (en) * | 2018-02-08 | 2018-12-07 | 王东 | A kind of fishing tap |
| CN208380541U (en) * | 2018-06-11 | 2019-01-15 | 北京爱地地质勘察基础工程公司 | Drill pipe overshot |
| CN208564482U (en) * | 2018-07-24 | 2019-03-01 | 张坤鹏 | Compound box tap |
| CN208918498U (en) * | 2018-09-13 | 2019-05-31 | 中国煤炭地质总局一二九勘探队 | A kind of fishing device for the drill collar that falls off in large diameter drilling |
| CN208934596U (en) * | 2018-11-12 | 2019-06-04 | 侯爱霞 | A kind of highway bridge construction drilling platform |
| CN209724276U (en) * | 2019-04-02 | 2019-12-03 | 曹文秀 | A kind of fish fishing tap |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212454343U (en) * | 2020-05-14 | 2021-02-02 | 中勘资源勘探科技股份有限公司 | Be used for colliery ground heavy-calibre drilling tool fishing device |
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