CN111764856A - Jaw type fisher - Google Patents
Jaw type fisher Download PDFInfo
- Publication number
- CN111764856A CN111764856A CN202010713589.5A CN202010713589A CN111764856A CN 111764856 A CN111764856 A CN 111764856A CN 202010713589 A CN202010713589 A CN 202010713589A CN 111764856 A CN111764856 A CN 111764856A
- Authority
- CN
- China
- Prior art keywords
- drill rod
- main
- main drill
- jaws
- jaw
- 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.)
- Granted
Links
- 230000007704 transition Effects 0.000 claims abstract description 22
- 238000005553 drilling Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract description 2
- 210000000078 claw Anatomy 0.000 description 9
- 239000013049 sediment Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Images
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
- E21B12/00—Accessories for drilling tools
- E21B12/06—Mechanical cleaning devices
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Marine Sciences & Fisheries (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a jaw type fisher which comprises a main drill rod, a transition drill rod, a support and a plurality of jaws; the diameter of the transition drill rod is larger than that of the main drill rod, the transition drill rod is coaxially fixed on the main drill rod, the support is fixed at the lower end of the transition drill rod, the upper ends of the clamping jaws are respectively hinged on the support at intervals through hinge shafts along the circumferential direction of the main drill rod, and the plurality of clamping jaws are respectively connected with an opening control rope; when the jack catch is not under the action of external force, the jack catches hang down freely and are in a closed state, and the jack catches can be rotated by pulling the opening control rope upwards to enable the jack catches to be in an opened state. The invention has the function of closing and clamping the flange after penetrating through the flange, can be used for salvaging a drill bit only with an upper flange on an operation surface, in addition, the clamping jaw is not only a main part of the salvaging device, but also has the function of a scraper drill bit, and the transition drill rod is used as a stress main body of the clamping jaw salvaging device, so that the manufacturing cost of the salvaging device can be reduced.
Description
Technical Field
The invention relates to the field of drilling construction, in particular to a jaw type fisher.
Background
In the well drilling construction, because flange joint bolt is not hard up and is cut off and cause and fall to bore the accident occasionally and take place, if can not in time salvage, will probably cause very big loss for the project, and salvage and have following degree of difficulty: 1. the mud has poor stability, silt is rapidly precipitated after the mud falls off, and the drill bit falling off the bottom of the hole is buried; 2. the center hole of the drill bit falling into the hole is an inclined hole, and the conventional internal expansion type fisher cannot be adopted for fishing.
Disclosure of Invention
The invention aims to solve the technical problem of providing a jaw type fisher which can clean sediment on a drill bit before fishing and can be used for fishing the drill bit with an upper flange on an operation surface.
In order to solve the technical problems, the invention adopts the following technical scheme: a jaw type fisher comprises a main drill rod, a transition drill rod, a support and a plurality of jaws;
the diameter of the transition drill rod is larger than that of the main drill rod, the transition drill rod is coaxially fixed on the main drill rod, the support is fixed at the lower end of the transition drill rod, the upper ends of the clamping jaws are respectively hinged on the support at intervals through hinge shafts along the circumferential direction of the main drill rod, and the plurality of clamping jaws are respectively connected with an opening control rope;
when the jack catch is not under the action of external force, the jack catches hang down freely and are in a closed state, and the jack catches can be rotated by pulling the opening control rope upwards to enable the jack catches to be in an opened state.
Furthermore, the clamping jaws are paired pairwise, the two clamping jaws in each pair are symmetrically arranged on the support by taking the axis of the main drill rod as a symmetry axis, and an elastic clamping jaw folding stressing rope is connected between the two clamping jaws in each pair.
Further, the inner sides of the lower ends of the jaws are provided with hook parts, and when the jaws hang down freely, the hook parts of the jaws are closer to the axis of the main drill rod than the hinge shafts hinged with the corresponding jaws.
Furthermore, the main drill rod is of a hollow structure, the transition drill rod is composed of a support cylinder and a support plate fixed at the bottom of the support cylinder, an installation through hole is formed in the middle of the support plate, and the lower end of the main drill rod penetrates through the support cylinder and is fixed in the installation through hole.
The drilling device is characterized by further comprising a plurality of air pipes, wherein the upper ends of the air pipes are fixed on the main drill rod, the lower ends of the air pipes are fixed on the main drill rod or the supporting plate, a cylindrical flow divider is mounted on the inner circumferential surface of the lower end of the main drill rod, and flow channels communicated with the cylindrical flow divider and the air pipes are respectively formed in the positions, corresponding to the air pipes, of the lower end of the main drill rod.
Furthermore, a circle of annular groove is formed in the inner circumferential surface of the lower end of the main drill rod along the circumferential direction of the main drill rod, the cylindrical flow divider is blocked at the notch of the annular groove, and the flow passage is communicated with the annular groove.
Furthermore, the air pipe is formed by connecting an upper long-section pipe and a lower short-section pipe through a flexible joint.
Further, the claw is composed of a bent main body and a hook portion provided on the inner side of the lower end of the main body.
The invention has the beneficial effects that:
the invention is used by extending into a well, before salvaging, the open control rope is lifted upwards to control each jack catch to be always in an open state, then the drill drives the main drill rod to rotate and then drives each jack catch to rotate, thus the open jack catch can be used as a scraper drill bit to stir the silt deposited on the drill bit, the sediment is absorbed and arranged on the ground by utilizing the mud circulating principle of the drill, thereby the sediment on the drill bit can be cleaned as much as possible before salvaging, then each jack catch is lowered to a salvaging setting operation surface, each open control rope is loosened to break the restraint on each jack catch, so that the jack catch is in a free state, the jack catch can be automatically folded under the action of the dead weight to grasp the flange on the drill bit, finally the main drill rod is lifted, the drill bit can be fished out to drill a well, and the jack catch is lifted under the action of the self gravity of the drill bit in the process of clamping the jack catch to grasp, the jack catch can not be opened, so that the self-locking function is realized, and the drill bit can be prevented from dropping secondarily.
The invention has the function of closing and clamping the flange after penetrating through the flange, can be used for salvaging a drill bit with an upper flange on the working face, in addition, the clamping jaw is not only a main part of the salvaging device, but also has the function of a scraper drill bit, and the transition drill rod is used as a stress main body of the clamping jaw salvaging device, so that the manufacturing cost of the salvaging device can be reduced; the invention is successfully salvaged once, has direct benefits of millions, needs to change the design if the drill bit is buried under the hole and the hole position is changed again, has great loss and bad influence, and provides precious experience for handling the same kind of drilling-dropping accidents.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention (jaws are in an open state).
Fig. 2 is a schematic structural view (jaws are closed) of an embodiment of the present invention.
Fig. 3 is an enlarged view at a in fig. 1.
Figure 4 is a schematic view of the use of one embodiment of the invention (before the jaws grip the bit flange).
Figure 5 is a schematic view of the use of one embodiment of the invention (after the jaws have grasped the drill bit flange).
The components in the drawings are labeled as follows:
the drill pipe comprises a main drill pipe 1, a flow channel 11, an annular groove 12, a transition drill pipe 2, a support barrel 21, a support plate 22, a support 3, a hinge shaft 31, a jaw 4, a main body 41, a hook 42, an opening control rope 5, a jaw 6 closing stressing rope 6, an air pipe 7, an upper long-section pipe 71, a lower short-section pipe 72, a flexible joint 73, a cylindrical flow divider 8, a drill bit 9 and a flange 91.
Detailed Description
The present invention will be described in detail below with reference to the attached drawings, and the technical solutions in the embodiments of the present invention will be clearly and completely described. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, "a plurality" means two or more. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
See fig. 1-5.
The invention relates to a jaw type fisher, which comprises a main drill rod 1, a transition drill rod 2, a support 3 and a plurality of jaws 4;
the diameter of the transition drill rod 2 is larger than that of the main drill rod 1, the transition drill rod 2 is coaxially fixed on the main drill rod 1, the support 3 is fixed at the lower end of the transition drill rod 2, the upper ends of the clamping jaws 4 are respectively hinged on the support 3 at intervals through hinge shafts 31 along the circumferential direction of the main drill rod 1, and the clamping jaws 4 are respectively connected with an opening control rope 5;
when the jack catch 4 is not under the action of external force, the jack catch 4 hangs down freely and is in a closed state, and the jack catch 4 can be rotated by lifting the opening control rope 5 upwards, so that the jack catch 4 is in an open state.
The invention is used by extending into a well, before salvaging, the open control rope is lifted upwards to control each jack catch to be always in an open state, then the drill drives the main drill rod to rotate and then drives each jack catch to rotate, thus the open jack catch can be used as a scraper drill bit to stir the silt deposited on the drill bit 9, the sediment is absorbed and arranged on the ground by utilizing the mud circulation principle of the drill, thereby the sediment on the drill bit can be cleaned as much as possible before salvaging, then each jack catch is lowered to a salvaging setting operation surface, each open control rope is loosened to break the restraint on each jack catch, so that the jack catch is in a free state, the jack catch can be automatically folded under the action of the dead weight, the flange 91 on the drill bit 9 is grasped, finally the main drill rod is lifted, the drill bit can be fished out for well drilling, and in the lifting process after the jack catch grips the flange, under the action of the self gravity of the drill bit, the jack catch can not be opened, so that the self-locking function is realized, and the drill bit can be prevented from dropping secondarily.
In one embodiment, the plurality of jaws 4 form a pair in pairs, two jaws 4 in each pair are symmetrically arranged on the support 3 by taking the axis of the main drill rod 1 as a symmetry axis, and an elastic jaw folding stressing rope 6 is connected between the two jaws 4 in each pair. In order to ensure that the claws are certainly folded to an ideal salvage state, elastic claw folding stress application ropes are connected between symmetrical non-paired claws, and the stress application ropes can assist stress application through the claw folding stress application ropes, so that the claws are folded at an accelerated speed, and the claws can effectively clamp and hold the upper flange of the drill bit.
In the concrete implementation, four salvaging claws are arranged in pairs symmetrically and distributed at even intervals, so that the clamping effect is better.
In one embodiment, the plurality of jaws 4 have hooks 42 on the inner side of their lower ends, and when the plurality of jaws 4 hang down freely, the hooks 42 of the plurality of jaws 4 are closer to the axis of the kelly 1 than the hinge shaft 31 on which the respective jaws 4 are hinged. The design has more stable inside locking force, and the auto-lock effect is better, can block the drill bit more effectively, prevents to drop.
In an embodiment, the main drill rod 1 is a hollow structure, the transition drill rod 2 is composed of a support cylinder 21 and a support plate 22 fixed at the bottom of the support cylinder 21, a mounting through hole is formed in the middle of the support plate 22, and the lower end of the main drill rod 1 penetrates through the support cylinder 21 and is fixed in the mounting through hole. By the design, the mud circulating principle of the drilling machine can be effectively utilized, and sediment is absorbed by the main drill rod and is arranged on the ground side by side.
In an embodiment, the drilling machine further comprises a plurality of air pipes 7, the upper ends of the air pipes 7 are fixed on the main drill rod 1, the lower ends of the air pipes 7 are fixed on the main drill rod 1 or the supporting plate 22, a cylindrical splitter 8 is installed on the inner circumferential surface of the lower end of the main drill rod 1, and flow channels 11 communicated with the cylindrical splitter 8 and the air pipes 7 are respectively opened at positions of the lower end of the main drill rod 1 corresponding to the air pipes 7. When the pneumatic reverse circulation type pneumatic drill is used, the air pipe is a compressed air channel during compressed air reverse circulation, air flow enters from the upper end of the air pipe, is fully mixed with slurry in the drill rod after being split by the flow channel and the cylindrical splitter, negative pressure is generated, the reverse circulation purpose is achieved, the cylindrical splitter is cylindrical as the name suggests, and a plurality of through holes are formed in the cylindrical splitter and used for splitting.
In an embodiment, the inner circumferential surface of the lower end of the main drill rod 1 is provided with a ring-shaped groove 12 along the circumferential direction of the main drill rod 1, the cylindrical flow divider 8 is plugged at the notch of the ring-shaped groove 12, and the flow passage 11 is communicated with the ring-shaped groove 12. By the design, the air flow can enter the annular groove from the flow channel and is divided by the cylindrical splitter, so that the air flow can enter the drill rod more uniformly, and the mixing effect is improved.
In one embodiment, the air duct is formed by connecting an upper long-section duct 71 and a lower short-section duct 72 through a flexible joint 73. The flexible joint can prevent the air pipe from generating stress deformation and breaking when the drill rod is subjected to torque transmission or vibration.
In specific implementation, the upper long-section pipe 71 and the lower short-section pipe 72 are inserted into the flexible joint 73, and sealing rings are respectively arranged between the upper long-section pipe 71 and the flexible joint 73 and between the lower short-section pipe 72 and the flexible joint 73 for sealing.
In one embodiment, the claw 4 is composed of a bent main body 41 and the hook portion 42 provided inside the lower end of the main body 41. The design like this can effectively grasp the flange on the drill bit to play to rise the in-process after the flange is embraced to the jack catch card, the jack catch possesses self-locking function, can prevent that the drill bit secondary from dropping.
It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and that various modifications or changes in light thereof will be suggested to persons skilled in the art and are to be included within the spirit and purview of this disclosure.
Claims (8)
1. The utility model provides a jack catch type fisher which characterized in that: the device comprises a main drill rod, a transition drill rod, a support and a plurality of clamping jaws;
the diameter of the transition drill rod is larger than that of the main drill rod, the transition drill rod is coaxially fixed on the main drill rod, the support is fixed at the lower end of the transition drill rod, the upper ends of the clamping jaws are respectively hinged on the support at intervals through hinge shafts along the circumferential direction of the main drill rod, and the plurality of clamping jaws are respectively connected with an opening control rope;
when the opening control rope is lifted upwards, the clamping jaws can be rotated to enable the clamping jaws to be in an opening state.
2. The jaw fisher of claim 1, wherein: the clamping jaws are paired pairwise, the two clamping jaws in each pair are symmetrically arranged on the support by taking the axis of the main drill rod as a symmetry axis, and an elastic clamping jaw closing stressing rope is connected between the two clamping jaws in each pair.
3. A jaw fisher according to claim 1 or 2 wherein: the inner sides of the lower ends of the jaws are provided with hook parts, and when the jaws hang down freely, the hook parts of the jaws are closer to the axis of the main drill rod than the hinge shafts hinged by the corresponding jaws.
4. A jaw fisher according to claim 1 or 2 wherein: the main drill rod is of a hollow structure, the transition drill rod is composed of a supporting cylinder and a supporting plate fixed to the bottom of the supporting cylinder, an installation through hole is formed in the middle of the supporting plate, and the lower end of the main drill rod penetrates through the supporting cylinder and is fixed in the installation through hole.
5. A jaw fisher according to claim 4 wherein: the drilling device is characterized by further comprising a plurality of air pipes, the upper ends of the air pipes are fixed on the main drill rod, the lower ends of the air pipes are fixed on the main drill rod or the supporting plate, a cylindrical flow divider is mounted on the inner circumferential surface of the lower end of the main drill rod, and flow channels communicated with the cylindrical flow divider and the air pipes are formed in the positions, corresponding to the air pipes, of the lower end of the main drill rod respectively.
6. A jaw fisher according to claim 5 wherein: the inner circumferential surface of the lower end of the main drill rod is provided with a circle of annular groove along the circumferential direction of the main drill rod, the cylindrical flow divider is blocked at the notch of the annular groove, and the flow passage is communicated with the annular groove.
7. A jaw fisher according to claim 5 wherein: the air pipe is formed by connecting an upper long-section pipe and a lower short-section pipe through a flexible joint.
8. A jaw fisher according to claim 1 or 2 wherein: the jack catch comprises a bent main body and a hook part arranged on the inner side of the lower end of the main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713589.5A CN111764856B (en) | 2020-07-21 | 2020-07-21 | Claw type fisher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010713589.5A CN111764856B (en) | 2020-07-21 | 2020-07-21 | Claw type fisher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111764856A true CN111764856A (en) | 2020-10-13 |
| CN111764856B CN111764856B (en) | 2024-08-13 |
Family
ID=72727202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010713589.5A Active CN111764856B (en) | 2020-07-21 | 2020-07-21 | Claw type fisher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111764856B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482897A (en) * | 2022-01-21 | 2022-05-13 | 煤炭科学技术研究院有限公司 | Device and method for salvaging dropped drill |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1613576A1 (en) * | 1988-12-08 | 1990-12-15 | В. Л. Гой | Downhole fishing device |
| RU2507374C1 (en) * | 2012-09-21 | 2014-02-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Device for withdrawal of deflecting wedge from well |
| CN104612618A (en) * | 2015-01-26 | 2015-05-13 | 成都科盛石油科技有限公司 | Oil well fisher |
| CN205521350U (en) * | 2016-02-01 | 2016-08-31 | 张波 | Material evidence search fishing device |
| CN212376625U (en) * | 2020-07-21 | 2021-01-19 | 中煤特殊凿井有限责任公司 | Jaw type fisher |
-
2020
- 2020-07-21 CN CN202010713589.5A patent/CN111764856B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1613576A1 (en) * | 1988-12-08 | 1990-12-15 | В. Л. Гой | Downhole fishing device |
| RU2507374C1 (en) * | 2012-09-21 | 2014-02-20 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | Device for withdrawal of deflecting wedge from well |
| CN104612618A (en) * | 2015-01-26 | 2015-05-13 | 成都科盛石油科技有限公司 | Oil well fisher |
| CN205521350U (en) * | 2016-02-01 | 2016-08-31 | 张波 | Material evidence search fishing device |
| CN212376625U (en) * | 2020-07-21 | 2021-01-19 | 中煤特殊凿井有限责任公司 | Jaw type fisher |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482897A (en) * | 2022-01-21 | 2022-05-13 | 煤炭科学技术研究院有限公司 | Device and method for salvaging dropped drill |
| CN114482897B (en) * | 2022-01-21 | 2023-09-26 | 煤炭科学技术研究院有限公司 | Device and method for fishing off drill |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111764856B (en) | 2024-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2678206C (en) | Top drive well casing system and method | |
| US6637526B2 (en) | Offset elevator for a pipe running tool and a method of using a pipe running tool | |
| CN212376625U (en) | Jaw type fisher | |
| CN111764856A (en) | Jaw type fisher | |
| US3351372A (en) | Split hook hoisting apparatus | |
| CN111088950B (en) | Winch system device for improving geological drilling lifting efficiency of offshore engineering | |
| CN114341045A (en) | Hoisting device capable of preventing pile from overturning | |
| CN113107410A (en) | Locking device for salvaging drilling core-taking pipe and using method thereof | |
| CN110306780B (en) | Scaffold hanging and fixing device arranged on shear wall | |
| JPS6011351Y2 (en) | Hydraulic hose automatic release device for helicopter hanging bucket | |
| CN215108830U (en) | Locking device for salvaging drilling core-taking pipe | |
| JP2007022789A (en) | Suspension tool and vertical pipe construction method | |
| CN210422455U (en) | Engineering drilling machine capable of efficiently discharging slag | |
| CN208430507U (en) | Filling pile head steel reinforcement cage | |
| CN210655850U (en) | Double-rope soil gripper | |
| CN216889744U (en) | Fisher is transferred to heavy object | |
| CN218465303U (en) | Implanted waist claw type self-anchoring lifting appliance | |
| CN218142049U (en) | Self-locking tool suitable for remote control submersible hanging fishing cable | |
| CN213898918U (en) | Drill rod fisher | |
| CN216518085U (en) | Deep hole anchor rope is transferred centering chuck fixing device | |
| CN214330575U (en) | Broken rod fisher for drill rod of rotary drilling rig | |
| CN219314355U (en) | Steel construction independent column lifting device | |
| CN211008551U (en) | A test end cap for preventing logging instrument falls into well | |
| CA1062237A (en) | Power operated drill pipe tongs | |
| US1796981A (en) | Spring hoisting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |