CN214091765U - Tool for screwing and unscrewing drill rod - Google Patents
Tool for screwing and unscrewing drill rod Download PDFInfo
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- CN214091765U CN214091765U CN202023248342.5U CN202023248342U CN214091765U CN 214091765 U CN214091765 U CN 214091765U CN 202023248342 U CN202023248342 U CN 202023248342U CN 214091765 U CN214091765 U CN 214091765U
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Abstract
The utility model discloses a tool for screwing and unscrewing a drill rod, which comprises an operation turntable and a connecting plate, wherein the operation turntable is positioned above the connecting plate; a connecting clamping groove used for being connected with a drill rod is formed in the connecting plate, and the connecting clamping groove and the operation turntable are arranged coaxially; at least two connecting rods are connected between the operation turntable and the connecting plate, and each connecting rod is provided with a first connecting end used for being connected with the connecting plate and a second connecting end used for being connected with the operation turntable; the distance between the first connecting end and the axis is smaller than the distance between the second connecting end and the axis. The staff drives the connecting plate rotates to twist the drilling rod through rotating the operation carousel, has improved work efficiency. The operation rotary table increases the torque for driving the connecting plate to rotate, so that the labor is saved for workers, and the work fatigue is reduced.
Description
Technical Field
The utility model relates to a well drilling auxiliary device field especially relates to a drilling rod is twisted and is unloaded instrument.
Background
Drill pipe is a device that is frequently used in drilling operations, and is loosened and damaged due to friction during drilling, and therefore, needs to be frequently tightened or replaced.
In the current drilling engineering construction process, along with the gradual increase of the cost of drilling labor, materials and the like, how to improve the drilling efficiency and save the drilling period becomes an important problem in the drilling construction. Currently, in drilling construction, workers mainly use pipe tongs to unscrew and tighten drill rod screw threads when going up and down a drilling tool. The operation efficiency of using the pipe wrench is not high, and the time and the labor are wasted.
In view of this, improvements are needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an improve work efficiency and reduce the tired drilling rod of work and twist off instrument.
The technical scheme of the utility model provides a tool for unscrewing the drill rod, which comprises an operation turntable and a connecting plate, wherein the operation turntable is positioned above the connecting plate; a connecting clamping groove used for being connected with a drill rod is formed in the connecting plate, and the connecting clamping groove and the operation turntable are arranged coaxially; at least two connecting rods are connected between the operation turntable and the connecting plate, and each connecting rod is provided with a first connecting end used for being connected with the connecting plate and a second connecting end used for being connected with the operation turntable; the distance between the first connecting end and the axis is smaller than the distance between the second connecting end and the axis.
Furthermore, a turntable clamping groove is formed in the operation turntable, and the turntable clamping groove and the connecting clamping groove are coaxially arranged.
Further, a plurality of handle operation parts are arranged on the operation rotary disc, surround the rotary disc clamping grooves and are arranged at intervals.
Further, an anti-slip coating is arranged on the handle operation part.
Furthermore, the rotary table clamping groove is U-shaped and is communicated with the outer side of the operation rotary table; a detachable stop rod is arranged in the rotary table clamping groove.
Further, the operation turntable comprises a first slot plate, a second slot plate and a third slot plate, and the third slot plate is connected between the first slot plate and the second slot plate; the first slot plate, the second slot plate and the third slot plate are connected to form the rotary table slot; one end of the stop rod is rotatably connected with the first clamping groove plate, and the other end of the stop rod is provided with a clamping hook which is used for being clamped with the second clamping groove plate.
Furthermore, a plurality of operating rods are connected to the operating turntable; the operating levers surround the outer side of the operating turntable and are arranged at intervals; the distance between any two adjacent operating rods is equal.
Further, the connecting rod includes a first connecting rod connected with the connecting plate and a second connecting rod connected with the operation turntable, and the second connecting rod is connected with the first connecting rod in a sliding manner.
Furthermore, a first through hole is formed in the first connecting rod, and a plurality of second through holes are formed in the second connecting rod at intervals; the first through hole is connected with the second through hole through a connecting bolt, and the connecting bolt is selectively connected with one of the second through holes.
Further, the first connecting rod is connected with the connecting plate through a connecting bolt.
By adopting the technical scheme, the method has the following beneficial effects:
the utility model provides a drilling rod unscrewing tool, including operation carousel and connecting plate, the operation carousel is located the top of connecting plate. The connecting plate is provided with a connecting clamping groove used for being connected with the drill rod, and the connecting clamping groove and the operation turntable are arranged coaxially. At least two connecting rods are connected between the operation rotary table and the connecting plate, and each connecting rod is provided with a first connecting end used for being connected with the connecting plate and a second connecting end used for being connected with the operation rotary table. The distance between the first connecting end and the axis is smaller than the distance between the second connecting end and the axis. The staff drives the connecting plate through rotating the operation carousel and rotates and twist the drilling rod, has improved work efficiency. The operation turntable increases the moment, so that the labor is saved for the workers, and the working fatigue is reduced.
Drawings
FIG. 1 is a schematic view of a tool for unscrewing drill rods according to an embodiment of the present invention;
FIG. 2 is a schematic view of a drill pipe unscrewing tool and a drill pipe according to an embodiment of the present invention;
FIG. 3 is a schematic view of an operating turntable according to an embodiment of the present invention;
fig. 4 is a schematic view of a connecting rod according to an embodiment of the present invention;
fig. 5 is a schematic view of a first connecting rod and a connecting plate according to an embodiment of the present invention.
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
It is easily understood that, according to the technical solution of the present invention, a plurality of structural modes and implementation modes that can be mutually replaced by those of ordinary skill in the art can be achieved without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as limiting or restricting the technical solutions of the present invention in its entirety or as a limitation of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
As shown in fig. 1-2, an embodiment of the present invention provides a tool 10 for unscrewing a drill rod, which includes an operation dial 1 and a connection plate 2, wherein the operation dial 1 is located above the connection plate 2.
The connecting plate 2 is provided with a connecting clamping groove 21 for connecting with a drill rod 20, and the connecting clamping groove 21 is arranged coaxially with the operation turntable 1.
At least two connecting rods 3 are connected between the operation rotary table 1 and the connecting plate 2, and the connecting rods 3 are provided with a first connecting end 31 connected with the connecting plate 2 and a second connecting end 32 connected with the operation rotary table 1.
The first connection end 31 is at a smaller distance from the axis than the second connection end 32.
The drill rod unscrewing tool 10 is primarily used in drilling operations for unscrewing a drill rod 20, screwing the drill rod 20 down or unscrewing the drill rod 20.
The drill rod unscrewing tool 10 comprises an operating turntable 1, a connecting plate 2 and a connecting rod 3. Wherein the operation turntable 1 is positioned above the connecting plate 2, and the connecting rod 3 is connected between the operation turntable 1 and the connecting plate 2.
Alternatively, in order to improve the structural strength of the drill pipe unscrewing tool 10, the operating dial 1, the connecting plate 2 and the connecting rod 3 are all made of a metal material, such as steel, aluminum or iron.
The connecting plate 2 is provided with a connecting clamping groove 21, and the connecting clamping groove 21 penetrates through the connecting rod 3 and is used for being connected with the drill rod 20. The drill rod 20 is cylindrical, and the shape of the connecting clamping groove 21 is matched with that of the drill rod 21, that is, at least part of the connecting clamping groove 21 is circular arc-shaped. In this embodiment, the connecting slot is a U-shaped connecting slot, and an opening of the U-shaped connecting slot is communicated with the outer side of the connecting plate 2. When the connecting plate 2 is connected with the drill rod 20, the drill rod 20 is clamped in the U-shaped connecting groove through the opening of the U-shaped connecting groove.
The operation turntable 1 is located above the connecting plate 2, and the operation turntable 1 and the connecting slot 21 are coaxially arranged, that is, the operation turntable 1 and the arc section of the connecting slot have the same central axis 4. The operation dial 1 is circular or square.
At least two connecting rods 3 are connected between the operation turntable 1 and the connecting plate 2, and in the embodiment, three connecting rods 3 are connected between the operation turntable 1 and the connecting plate 2. In the following, three tie bars 3 will be described as an example. The three connecting rods 3 surround the outside of the connecting clamping groove 21 and are arranged at intervals. The distance between any two adjacent connecting rods 3 is equal. So, the staff can drive connecting plate 2 through rotating operation carousel 1 and rotate to twist the drilling rod.
The two ends of the connecting rod 3 are respectively a first connecting end 31 and a second connecting end 32, wherein the first connecting end 31 is connected with the connecting plate 2, and the second connecting end 32 is connected with the operation turntable 1. The distance between the second connection end 32 and the central axis 4 is larger than the distance between the first connection end 31 and the central axis 4. That is, the connecting rods 3 are inclined as a whole, and the distance between the two connecting rods 3 gradually increases in the direction from bottom to top. So set up, increased the moment of rotating connecting plate 2 for more laborsaving during the staff operation. For convenience of description, the force applied by the connecting plate 2 to rotate the drill rod 20 is defined as F1, and the distance between the first connecting end 31 and the central axis 4 is defined as L1. The external force acting on the operation dial 1 is defined as F2, and the distance between the second connecting end 32 and the central axis 4 is defined as L2. Wherein, F1 × L1 ═ F2 × L2. Therefore, the arrangement has the effect of saving labor.
When the drill rod unscrewing tool 10 is used specifically, the drill rod 20 is inserted into the connecting clamping groove 21, so that the drill rod 20 and the connecting clamping groove 21 are in interference fit. Then, the operation rotary table 1 is rotated, and the rotation of the operation rotary table 1 drives the connecting plate 2 to rotate, so as to drive the drill rod 20 to rotate. The whole operation process is simple and convenient, the previous mode of screwing the drill rod 20 by using pipe tongs is changed, and the working efficiency is improved. Operation carousel 1 is located the top of connecting plate 2, makes things convenient for the staff operation, avoids the staff to need stoop, has less tired degree.
The utility model provides a pair of instrument 10 is unscrewed to drilling rod, including operation carousel 1 and connecting plate 2, operation carousel 1 is located the top of connecting plate 2. The connecting plate 2 is provided with a connecting clamping groove 21 for connecting with a drill rod, and the connecting clamping groove 21 is arranged coaxially with the operation turntable 1. At least two connecting rods 3 are connected between the operation rotary table 1 and the connecting plate 2, and the connecting rods 3 are provided with a first connecting end 31 connected with the connecting plate 2 and a second connecting end 32 connected with the operation rotary table 1. The first connection end 31 is at a smaller distance from the axis than the second connection end 32. The staff drives the connecting plate 2 to rotate and screw the drill rod by rotating the operation turntable 1. The operation mode is simple, and the working efficiency is improved. And the operation turntable 1 increases the torque for rotating the drill rod, thereby having the function of saving labor and reducing the fatigue degree of work.
In one embodiment, as shown in fig. 1, a turntable clamping slot 11 is arranged on the operation turntable 1, and the turntable clamping slot 11 and the connecting clamping slot 21 are coaxially arranged. The rotary table clamping groove 11 penetrates through the operation rotary table 1 and is used for being connected with the drill rod 20 to enable the drill rod 20 to be stable. The shape of the rotary table clamping groove 11 is matched with that of the drill rod 20, so that at least part of the rotary table clamping groove 11 is in a circular arc shape. The operating dial 1, the dial pocket 11 and the connecting pocket 21 have the same central axis 4. When the drill rod unscrewing tool 10 is connected to the drill rod 20, at least a portion of the drill rod 20 is captured between the connection slot 21 and the rotary table slot 11. The rotary table pockets 11 provide another point of retention for the drill rod 20, making the connection of the drill rod 20 to the drill rod unscrew tool 10 more secure.
In one embodiment, as shown in fig. 1 and 3, the operation dial 1 is provided with a plurality of handle operation portions 12, and the plurality of handle operation portions 12 surround the dial slot 11 and are arranged at intervals. The handle operation part 12 is used for a worker to hold and rotate the operation turntable 1, so that the worker can operate the turntable conveniently.
Specifically, the operation dial 1 includes a dial main plate on which the connection card slot 21 is provided, and a dial ring plate 14. A turntable ring plate 14 surrounds the outside of the turntable main plate and is spaced from the turntable main plate by a distance. The handle operation part 12 is connected between the turntable main plate and the turntable annular plate 14, one end of the handle operation part 12 is connected with the turntable main plate, and the other end is connected with the turntable annular plate 14. The operator can hold the handle operating part 12 with his hand to rotate the operating dial 1.
In other embodiments, the handle operating portion 12 may be formed to protrude upward from the surface of the operation dial 1.
In one embodiment, as shown in fig. 1 and 3, the handle operating portion 12 is provided with an anti-slip coating 121. An anti-slip coating 121 is provided on the outer side of the handle operation portion 12, and the anti-slip coating 121 covers the handle operation portion 12. The anti-slip coating layer 121 is formed of a plastic layer, a resin layer, or by heat treatment on the outer side of the handle operating portion 12. It has skid-proof effect, makes things convenient for the staff to operate.
In one embodiment, as shown in fig. 1 and 3, the turntable clamping groove 11 is U-shaped, and the turntable clamping groove 11 is communicated with the outer side of the operation turntable 1. A detachable stop rod 13 is arranged in the rotary table clamping groove 11.
Specifically, the operation dial 1 includes a dial main plate and a dial ring plate 14, and the dial clamp groove 11 is provided on the dial main plate. The turntable annular plate 14 has a first plate end 141 and a second plate end 142, and an annular plate opening communicating with the turntable slot 11 is formed between the first plate end 141 and the second plate end 142. The turntable main board comprises a first slot plate 15, a second slot plate 16 and a third slot plate 17. The first slot plate 15 and the second slot plate 16 are arranged at intervals, and the third slot plate 17 is an arc-shaped plate and is connected between the first slot plate 15 and the second slot plate 16. The first slot plate 15 is connected to the first plate end 141 and the second slot plate 16 is connected to the second plate end 142. The first slot plate 15, the second slot plate 16 and the third slot plate 17 enclose a U-shaped turntable slot 11. A stop rod 13 is arranged in the rotary table clamping groove 11, and the stop rod 13 is detachably connected with the rotary table clamping groove 11. When the drill rod 20 is clamped in the rotary table clamping groove 11, the stop rod 13 can be connected in the rotary table clamping groove 11, and the stop rod 13 stops the drill rod 20 to prevent the drill rod 20 from being separated from the rotary table clamping groove 11. When it is desired to remove the drill rod 20, the stop rod 13 is removed from the carousel pockets 11 so that the drill rod 20 may be removed.
Optionally, the stop bar 13 is screwed to the first and second slot plates 15, 16. Thus, the connection is firmer.
In one embodiment, as shown in fig. 1 and 3, the operation dial 1 includes a first slot plate 15, a second slot plate 16, and a third slot plate 17, and the third slot plate 17 is connected between the first slot plate 15 and the second slot plate 16. The first slot plate 15, the second slot plate 16 and the third slot plate 17 are connected to form a rotary table slot 11. One end of the stop rod 13 is rotatably connected to the first slot plate 15, and the other end is provided with a hook 132 for being clamped with the second slot plate 16.
Specifically, one end of the stop rod 13 is provided with a stop rod sleeve 131, the other end is provided with a snap hook 132, and the stop rod sleeve 131 is sleeved on the first slot plate 15, so that the stop rod 13 can rotate around the first slot plate 15. The worker may rotate the stop rod 13 to cause the hook 132 to be caught on the second slot plate 16, so that the stop rod 13 is located in the rotary disk slot 11. Preferably, a lifting rope 18 is connected between the handle operating part 12 adjacent to the first chuck plate 15 and the turntable annular plate 14. When the hook 132 is separated from the second chute plate 16, the hook 132 can hook the lifting rope 18 or ride on the lifting rope 18.
In one embodiment, as shown in fig. 1 and 3, a plurality of operation levers 5 are connected to the operation dial 1. A plurality of operating levers 5 are wound around the outside of the operating dial 1 and are arranged at intervals. The distance between any adjacent two of the operation levers 5 is equal.
Specifically, an operating lever 5 is provided on the outer side of the operating dial 1, and an end of the operating lever 5 is connected to the operating dial 1 and extends outward. Two adjacent operating levers 5 are spaced apart from each other by a distance. The distance between any adjacent two of the operation levers 5 is equal. The operator can hold the operation lever 5 with hand to rotate the operation dial 1. The arrangement of the operating rod 5 further increases the moment, so that the labor is saved when the worker rotates the drill rod 20.
In one embodiment, as shown in fig. 3, the operation rod 5 is detachably connected to the operation dial 1. The operating rod 5 can be separated from and connected with the operating turntable 1, so that the operating rod 5 is convenient to mount and dismount, and the operating rod 5 can be replaced when damaged.
Optionally, an external thread is arranged on the operating rod 5, a mounting hole is formed in the operating turntable 1, an internal thread is arranged in the mounting hole, the operating rod 5 is inserted into the mounting hole, and the external thread is matched with the internal thread. Thus, the connection is firmer.
In one embodiment, as shown in fig. 1 and 4, the connecting rod 3 includes a first link 33 connected to the connecting plate 2 and a second link 34 connected to the operating dial 1, and the second link 34 is slidably connected to the first link 33.
Specifically, the connecting rod 3 is formed by connecting a first connecting rod 33 and a second connecting rod 34, wherein the first connecting rod 33 is connected with the connecting plate 2, and the second connecting rod 34 is connected with the operating turntable 1. The first link 33 is slidably connected to the second link 34 such that the first link 33 and the second link 34 can slide relative to each other, thereby adjusting the overall length of the connecting rod 3. The sliding connection can be realized by arranging a sliding rail or a sliding groove.
In one embodiment, as shown in fig. 4, the first link 33 is provided with a first through hole 331, and the second link 34 is provided with a plurality of second through holes 341 at intervals. The first through hole 331 is connected to the second through holes 341 by a connection pin 6, and the connection pin 6 is selectively connected to one of the second through holes 341.
Specifically, the first link 33 is provided with a link slide (not shown) opened toward the second link 34, and the second link 34 is inserted into the link slide to be clearance-fitted thereto so that the second link 34 can slide therein. The first link 33 is provided with a first through hole 331, the second link 34 is provided with a plurality of second through holes 341, and the plurality of second through holes 341 are provided at intervals in the extending direction of the second link 34. When the connecting rod 3 is adjusted to a proper length, the first through hole 331 is aligned with the second through hole 341 in a corresponding position, and then the connecting pin 6 is inserted, and the connecting pin 6 passes through the first through hole 331 and the second through hole 341, so that the first link 33 is fixed to the second link 34. So set up, simple structure, convenient adjustment.
In one embodiment, as shown in fig. 1 and 5, the first link 33 is connected to the connecting plate 2 by a connecting bolt 7. The first link 33 is provided with a fitting groove 332 opened toward the connection plate 2. The connection plate 2 is provided with communication holes 22 corresponding to the fitting grooves 332. When the first link 33 is coupled to the coupling plate 2, the fitting groove 332 is aligned with the communication hole 22, and then the coupling bolt 7 is inserted, and the coupling bolt 7 is threadedly coupled with the fitting groove 332. So configured, the connection plate 2 can be replaced. The staff can change the connecting plate 2 of different model sizes according to the size of drilling rod 20, also can change connecting plate 2 after adjusting connecting rod 3 length. When the length of the connecting rod 3 needs to be adjusted, the connecting plate 2 is firstly detached, then the length of the connecting rod 3 is adjusted, and then the proper connecting plate 2 is installed.
To sum up, the utility model provides a drilling rod is unscrewed and is unloaded instrument, including operation carousel and connecting plate, the operation carousel is located the top of connecting plate. The connecting plate is provided with a connecting clamping groove used for being connected with the drill rod, and the connecting clamping groove and the operation turntable are arranged coaxially. At least two connecting rods are connected between the operation rotary table and the connecting plate, and each connecting rod is provided with a first connecting end used for being connected with the connecting plate and a second connecting end used for being connected with the operation rotary table. The distance between the first connecting end and the axis is smaller than the distance between the second connecting end and the axis. The staff rotates the operation carousel and drives the connecting plate and rotate to twist the drilling rod. The operation is simple and convenient, and the efficiency of screwing and unscrewing the drill rod is improved. The operation carousel has increased the moment of torsion that rotates the connecting plate for it is more laborsaving when staff rotates the operation carousel, reduces fatigue.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.
Claims (10)
1. A tool (10) for unscrewing a drill rod is characterized by comprising an operation turntable (1) and a connecting plate (2), wherein the operation turntable (1) is positioned above the connecting plate (2);
a connecting clamping groove (21) used for being connected with a drill rod (20) is formed in the connecting plate (2), and the connecting clamping groove (21) and the operation turntable (1) are coaxially arranged;
at least two connecting rods (3) are connected between the operation turntable (1) and the connecting plate (2), and each connecting rod (3) is provided with a first connecting end (31) connected with the connecting plate (2) and a second connecting end (32) connected with the operation turntable (1);
the distance between the first connecting end (31) and the axis is smaller than the distance between the second connecting end (32) and the axis.
2. The drill rod unscrewing tool (10) as claimed in claim 1, characterized in that a rotary table clamping groove (11) is provided on the operating rotary table (1), and the rotary table clamping groove (11) and the connecting clamping groove (21) are coaxially arranged.
3. The tool (10) for unscrewing the drill rods as claimed in claim 2, characterized in that a plurality of handle operating portions (12) are provided on the operating dial (1), a plurality of said handle operating portions (12) surrounding the dial grip (11) and being spaced apart.
4. The pipe wrenching tool (10) as recited in claim 3, wherein the handle operating portion (12) is provided with an anti-slip coating (121).
5. The tool (10) for unscrewing drill rods as claimed in claim 2, characterized in that said carousel slot (11) is U-shaped, said carousel slot (11) communicating with the outside of said operating carousel (1);
and a detachable stop rod (13) is arranged in the rotary table clamping groove (11).
6. The shank unscrewing tool (10) according to claim 5, characterized in that the operating dial (1) comprises a first slot plate (15), a second slot plate (16) and a third slot plate (17), the third slot plate (17) being connected between the first slot plate (15) and the second slot plate (16);
the first slot plate (15), the second slot plate (16) and the third slot plate (17) are connected to form the rotary table slot (11);
one end of the stop rod (13) is rotatably connected with the first clamping groove plate (15), and the other end of the stop rod is provided with a clamping hook (132) which is connected with the second clamping groove plate (16) in a clamping mode.
7. The tool (10) for unscrewing drill rods as claimed in claim 1, characterized in that a plurality of operating rods (5) are connected to said operating dial (1);
the operating rods (5) surround the outer side of the operating turntable (1) and are arranged at intervals;
the distance between any two adjacent operating rods (5) is equal.
8. The tool (10) according to claim 1, wherein the connecting rod (3) comprises a first connecting rod (33) connected to the connecting plate (2) and a second connecting rod (34) connected to the operating dial (1), the second connecting rod (34) being slidably connected to the first connecting rod (33).
9. The tool (10) for unscrewing the drill rods as recited in claim 8, characterized in that said first connecting rod (33) is provided with a first through hole (331) and said second connecting rod (34) is provided with a plurality of second through holes (341) at intervals;
the first through hole (331) is connected with the second through holes (341) through a connecting plug (6), and the connecting plug (6) is selectively connected with one of the second through holes (341).
10. The shank unscrewing tool (10) according to claim 8, characterized in that the first connecting rod (33) is connected to the connecting plate (2) by means of a connecting bolt (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023248342.5U CN214091765U (en) | 2020-12-28 | 2020-12-28 | Tool for screwing and unscrewing drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023248342.5U CN214091765U (en) | 2020-12-28 | 2020-12-28 | Tool for screwing and unscrewing drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214091765U true CN214091765U (en) | 2021-08-31 |
Family
ID=77434858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023248342.5U Active CN214091765U (en) | 2020-12-28 | 2020-12-28 | Tool for screwing and unscrewing drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214091765U (en) |
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2020
- 2020-12-28 CN CN202023248342.5U patent/CN214091765U/en active Active
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