CN112855037B - Drill rod easy to disassemble and assemble - Google Patents
Drill rod easy to disassemble and assemble Download PDFInfo
- Publication number
- CN112855037B CN112855037B CN202110134747.6A CN202110134747A CN112855037B CN 112855037 B CN112855037 B CN 112855037B CN 202110134747 A CN202110134747 A CN 202110134747A CN 112855037 B CN112855037 B CN 112855037B
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- Prior art keywords
- connector
- clamping
- clamping part
- drill rod
- air pipe
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Links
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 210000003437 trachea Anatomy 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Drilling And Boring (AREA)
Abstract
The invention relates to the field of drilling tools, and provides a drill rod easy to disassemble and assemble, which comprises: a body; the first connector and the second connector are respectively arranged at two ends of the body, a first clamping part is arranged on the first connector, a second clamping part is arranged on the second connector, and drill rods to be spliced are connected with the second clamping part through the first clamping part; and the anti-loosening assembly is used for preventing the spliced first clamping part from being separated from the second clamping part. Compared with the prior art, the invention has the following advantages: the clamping between the first clamping part and the second clamping part can only connect a plurality of drill rods together through the structure of the clamping part, compared with the bolt connection in the prior art, the connecting mode is simpler and more convenient; compared with the traditional bolt connection, the torque force to be transmitted by the connection mode is larger, and the connection mode is more suitable for complex use environments.
Description
Technical Field
The invention relates to the field of drilling tools, in particular to a drill rod easy to disassemble and assemble.
Background
The drill rod is a combination of a connecting joint and a steel pipe, and a conventional drill rod joint is tightly connected by threads or bolts and is used for driving surface equipment of a drilling machine and a drill bit or bottom hole drilling and grinding device positioned at the bottom end of a (hole bottom) well. The purpose of the drill pipe is to transmit power and drill bit cuttings out of the hole, or to inject drilling mud into the bottom of the hole, connect the machine and raise, lower or rotate the bottom hole assembly with the drill bit. The drill rod must be able to bear alternating loads such as tension, pressure, torsion, bending, rotational centrifugal force, vibration and the like, and the working condition is very bad, and the conventional connection mode has the defect of difficult disassembly and assembly.
In order to meet production operation demands, the drill rods are required to be spliced and lengthened in most cases, threads or bolts are selected as a connecting mode in the prior art, so that the drill rods are firmly connected, the number of bolts required to be used is large, a knocking wrench is required to be used for fastening during disassembly and assembly, time and labor are wasted, threads are stressed and are difficult to be screwed uniformly, and threads are broken or sheared. In addition, due to the influence of the use environment of the drill rod, the bolt for connection is extremely easy to rust, and when the bolt is rusted, the drill rod is particularly troublesome to disassemble and assemble, the threaded connection has repeated service life, the risk of thread failure exists, and potential safety hazards are brought to operation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a drill rod easy to disassemble and assemble aiming at the current state of the art.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an easy dismouting drilling rod includes:
a body;
the first connector is arranged at one end of the body, a first clamping part is arranged on the first connector, and the first clamping part is arranged on the inner wall of the first connector;
the second connector is arranged at the other end of the body, a second clamping part is arranged on the second connector, the second clamping part is arranged at the outer side of the second connector, and a drill rod to be spliced is connected with the second clamping part through the first clamping part;
and the anti-loosening assembly is used for preventing the spliced first clamping part from being separated from the second clamping part.
The drill rod easy to disassemble and assemble is characterized in that a plurality of protruding blocks are arranged on the first clamping portion, protruding blocks are arranged on the inner wall of the first connector at intervals, a plurality of grooves are arranged on the second clamping portion, and the grooves are arranged on the outer side of the second connector at intervals.
The drill rod easy to disassemble and assemble is characterized in that a plurality of first anti-falling blocks are arranged on the first clamping portion, first anti-falling block intervals are arranged on the inner wall of the first connector, a plurality of second anti-falling blocks are arranged on the second clamping portion, second anti-falling block intervals are arranged on the outer side of the second connector, a clamping connector is arranged at one end of the first connector, and an inner hole consistent with the shape of the clamping connector is arranged inside the second connector.
The drill rod easy to disassemble and assemble is characterized in that a plurality of first clamping grooves are formed in the first clamping portion, a third anti-falling block is arranged between every two clamping grooves, first clamping grooves are formed in the inner wall of the first connector at intervals, a plurality of fourth anti-falling blocks are arranged in the second clamping portion, fourth anti-falling block intervals are formed in the outer side of the second connector, and a second clamping groove is formed between the fourth anti-falling blocks.
In the above-mentioned easy dismouting drilling rod, be equipped with the clamp plate on the locking subassembly, it sets up the second connector is close to the one end of body, the clamp plate detachable installs first connector is kept away from the one end of body.
The above-mentioned easy dismouting drilling rod, locking subassembly that takes off includes:
a jack disposed at the bottom of the first connector;
and the clamping plate is inserted into the jack.
The above-mentioned easy dismouting drilling rod, locking subassembly that takes off includes:
a plug pin;
the thread clearance hole is arranged at the upper end of the first connector;
the threaded pin is movably arranged in the threaded clearance hole, and one end of the threaded pin, which is far away from the threaded clearance hole, is provided with an external thread;
the locking piece, its one end rotatable install the upper end of first connector, be equipped with the fixed orifices on the locking piece.
In the above-mentioned easy dismouting drilling rod, the body outside is equipped with the solid fixed ring, be equipped with first gas pipe mounting hole on the solid fixed ring, it is equipped with first trachea to insert in the first gas pipe mounting hole.
In the above-mentioned easy dismouting drilling rod, all be equipped with the second trachea through-hole on first connector and the second connector, the second trachea is inserted in the second trachea through-hole and is equipped with the second trachea.
In the above-mentioned easy dismouting drilling rod, first trachea tip all is equipped with the connector.
Compared with the prior art, the invention has the following advantages:
(1) The clamping between the first clamping part and the second clamping part can only connect a plurality of drill rods together through the structure of the clamping part, and compared with the bolt connection in the prior art, the connecting mode is simpler and more convenient.
(2) Compared with the traditional bolt connection, the torque force to be transmitted by the connection mode is larger, and the connection mode is more suitable for complex use environments.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of the present invention of an easily removable drill pipe;
FIG. 2 is a perspective view of an embodiment of the present invention showing a drill rod;
FIG. 3 is a cross-sectional view of an embodiment of the present invention showing an easily removable drill rod;
FIG. 4 is a perspective view of a second drill rod of an embodiment of the present invention;
FIG. 5 is a perspective view of an alternate orientation of two drill rods of an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a third embodiment of the easily removable drill rod of the present invention;
FIG. 7 is a perspective view of a three-drill rod embodiment of the present invention;
FIG. 8 is a perspective view of an alternate orientation of three drill rods of an embodiment of the present invention;
FIG. 9 is a cross-sectional view of a fourth embodiment of the easily removable drill rod of the present invention;
FIG. 10 is a perspective view of a four-drill rod of an embodiment of the present invention;
FIG. 11 is a perspective view of an alternate orientation of four drill rods of an embodiment of the present invention;
in the drawing, a body 10, a first connector 20, a bump 21, a pressing bar 22, a threaded hole 23, a first anti-drop block 24, an insertion hole 25, a first locking groove 26, a third anti-drop block 27, a second connector 30, a groove 31, a second anti-drop block 32, an inner hole 33, a fourth anti-drop block 34, a second locking groove 35, a second air pipe mounting hole 36, an air pipe 40, a connector 41, a first anti-drop assembly 50, a pressing plate 51, a pressing bar 52, a handle 53, a bolt through hole 54, a fixed snap ring 60, a clamping piece 61, a first air pipe mounting hole 62, a hexagonal clamping head 70, a second anti-drop assembly 80, a locking block 81, a fixed block 82, a plug 83, a locking nut 84, a threaded pin 85, and a bolt position avoiding hole 86.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
The invention relates to a drill rod easy to disassemble and assemble, which comprises the following components: the body 10, the first connector 20, the second connector 30, and the anti-loosening assembly (the first anti-loosening assembly 50, the second anti-loosening assembly 80).
The first connector 20 and the second connector 30 are respectively arranged at two ends of the body 10, a first clamping part is arranged on the first connector 20, a second clamping part is arranged on the second connector 30, and drill rods to be spliced are connected with the second clamping part through the first clamping part. The anti-loosening assembly (the first anti-loosening assembly 50 and the second anti-loosening assembly 80) is used for preventing the spliced first clamping part from being separated from the second clamping part. The scope of the invention is explained in detail below by means of several embodiments:
embodiment one:
as shown in fig. 1 to 2, a drill rod easy to disassemble and assemble of the present embodiment includes: the anti-loosening device comprises a body 10, a first connector 20, a second connector 30, a fixed clamping ring 60, an air pipe 40 and a first anti-loosening assembly 50.
The first connector 20 and the second connector 30 are respectively arranged at two ends of the body 10, a first clamping part is arranged on the first connector 20, a plurality of protruding blocks 21 are arranged on the first clamping part, the protruding blocks 21 are arranged on the inner wall of the first connector at intervals, a second clamping part is arranged on the second connector 30, a plurality of grooves 31 are arranged on the second clamping part, the grooves 31 are arranged on the outer side of the second connector 30 at intervals, the cross sections of the protruding blocks 21 and the grooves 31 can be rectangular, trapezoid, rhombus and other shapes, as long as the protruding blocks 21 and the grooves 31 can be abutted against each other, the cross sections of the protruding blocks 21 and the grooves 31 in the embodiment are rectangular, and the protruding blocks 21 can be clamped in the grooves 31.
The first anti-loosening assembly 50 is provided with the pressing plate 51, the pressing plate 51 is movably arranged at one end, close to the body 10, of the second connector 30, one end of the pressing plate 51 abuts against the second connector 30, the other end of the pressing plate 51 can be detachably arranged at one end, far away from the body 10, of the first connector 20, the pressing plate 51 can be used for fixing the first connector 20 and the second connector 30 after being clamped, a bolt through hole 54 is formed in the pressing plate 51, a threaded hole 23 is formed in the abutting end of the first connector 20 and the pressing plate 51, and the pressing plate 51 can be locked to the first connector 20 through bolts.
The handle 53 is arranged at one end of the pressing plate 51 far away from the second connector 20, the handle 53 can be welded on the baffle plate 51 or locked on the pressing plate 51 through bolts, and the handle 53 enables the installation and the disassembly of the whole drill rod to be simpler.
In order to make the engagement between the bump 21 and the groove 31 stronger, a receiving groove is provided at an end of the bump 21 abutting against the pressing plate 51, and the pressing bar 22 is provided in the receiving groove.
The fixed snap ring 60 is detachably arranged on the outer side of the body 10, the fixed snap ring 60 is formed by connecting two identical clamping pieces 61 through bolts, semicircular depressions consistent with the outer wall of the body 10 are formed in the inner wall of the clamping piece 61, and the clamping piece 61 can be attached to the body 10 through the semicircular depressions, so that the clamping piece 61 can be locked on the body 10. The clamping piece 61 is provided with a first air pipe mounting hole 62, the air pipe 40 is inserted into the first air pipe mounting hole 62, the two ends of the air pipe 40 are both provided with connectors 41, and the air pipe 40 can be connected together through the connectors 41.
When the drill rod is spliced, the lug 21 is inserted into the groove 31, the pressing plate 51 is locked on the first connector 20 by bolts, and finally the air pipe 40 on the drill rod body 10 is locked together.
And (2) implementing the following steps:
as shown in fig. 3 to 5, a drill rod easy to disassemble and assemble of the present embodiment includes: the device comprises a body 10, a first connector 20, a second connector 30, a hexagonal clamping connector 70, a fixed clamping ring 60, a clamping plate and an air pipe 40.
The first connector 20 and the second connector 30 are respectively disposed at two ends of the body 10, and the hexagonal clamping connector 70 is fixedly disposed at one end of the body 10 provided with the first connector 20. The hexagonal bayonet 70 in this embodiment may be replaced by other bayonet shapes, such as a triangle bayonet, a quadrangle bayonet, a pentagon bayonet, a heptagon bayonet, an octagon bayonet, etc., as long as the purpose of being snapped into the inner hole 33 of the second connector 30 can be achieved. The bottom of the first connector 20 is provided with a jack 25, the jack 25 can be used for inserting a clamping plate, and the clamping plate can be used for preventing the first connector 20 from rotating relative to the second connector 30. The first connector 20 is provided with a first clamping part, the first clamping part is provided with a plurality of first anti-falling blocks 24, the first anti-falling blocks 24 are arranged on the inner wall of the first connector 20 at intervals, the second connector 30 is provided with a second clamping part, the second clamping part is provided with a plurality of second anti-falling blocks 32, the second anti-falling blocks 32 are arranged on the inner wall of the first connector 20 at intervals, the second connector 30 is internally provided with a hexagonal inner hole 33, and the shape of the hexagonal inner hole 33 changes according to the shape change of the hexagonal clamping head 70. When the first connector 20 and the second connector 30 are clamped together, the outer wall of the hexagonal clamping connector 70 is attached to the inner wall of the hexagonal inner hole 33, so that the drill rod after connection can bear larger internal and external pressure, torsion force, bending force and vibration.
The fixed snap ring 60 is detachably arranged on the outer side of the body 10, the fixed snap ring 60 is formed by connecting two identical clamping pieces 61 through bolts, semicircular depressions consistent with the outer wall of the body 10 are formed in the inner wall of the clamping piece 61, and the clamping piece 61 can be attached to the body 10 through the semicircular depressions, so that the clamping piece 61 can be locked on the body 10. The clamping piece 61 is provided with a first air pipe mounting hole 62, the air pipe 40 is inserted into the first air pipe mounting hole 62, the two ends of the air pipe 40 are both provided with connectors 41, and the air pipe 40 can be connected together through the connectors 41.
When the drill rod is spliced, the first connector 20 is pushed away towards the direction of the body 10, so that the installation of the hexagonal clamping connector 70 and the hexagonal inner hole 33 is not affected, after the installation of the hexagonal clamping connector 70 and the hexagonal inner hole 33 is completed, the first connector 20 is pushed back and rotated until the second anti-falling block 32 is positioned right below the first anti-falling block 24, then a clamping plate is inserted into the inserting hole 25, and therefore the first connector 20 is prevented from being separated from the second connector 30 after rotating relative to the second connector 30, and finally the air pipe 40 is connected together.
The following three embodiments are implemented:
as shown in fig. 6 to 8, a drill rod easy to disassemble and assemble of the present embodiment includes: the body 10, the first connector 20, the second connector 30, the clamping connector 70, the clamping plate and the air pipe 40.
The present embodiment is a modification of the second embodiment, and the fixing clip ring 60 is removed and the second air pipe mounting hole 36 is formed on the first connector 20 and the second connector 30 on the basis of the second embodiment, so that the installation and the disassembly of the drill rod can be more convenient.
Embodiment four:
as shown in fig. 9 to 11, a drill rod of the present embodiment, which is easy to disassemble, includes: the body 10, the first connector 20, the second connector 30, the second anti-loosening assembly 80, the second air tube mounting hole 36, and the air tube 40.
The first connector 20 and the second connector 30 are respectively arranged at two ends of the body 10, a first clamping part is arranged on the first connector 20, a plurality of first clamping grooves 26 are arranged on the first clamping part, the first clamping grooves 26 are arranged at the upper end of the inner wall of the first connector 20 at intervals, a third anti-falling block 27 is arranged between every two clamping grooves 26, and the second connector 30.
The second anti-loosening assembly 80 includes: a locking block 81, a fixing hole 82, a bolt 83, a locking nut 84, a threaded pin 85 and a threaded clearance hole 86.
The screw thread keeps away a hole 86 and establishes in the upper end of first connector 20, the rotatable upper end at first connector 20 of installation of retaining block 81 is equipped with fixed orifices 82 on the retaining block 81, the distance of the center of fixed orifices 82 to the pivot of retaining block 81 just equals the distance of center to the pivot of retaining block 81 of screw thread keeps away a hole 86, be equipped with the second block portion on the second connector 30, be equipped with a plurality of fourth anticreep pieces 34 in the second block portion, fourth anticreep piece 34 interval sets up in the outside of second connector 30, be equipped with second block groove 35 between fourth anticreep piece 34, all be equipped with second trachea mounting hole 36 in the position that first connector 20 is relative with second connector 30.
When splicing the drill rods, inserting the second connector 30 into the first connector 20, rotating the second connector 30 until the fourth anti-falling block 34 is positioned right below the third anti-falling block 27, enabling the first clamping groove 26 to face the second clamping groove 35, inserting the bolt 83 into the aligned first clamping groove 26 and second clamping groove 35, rotating the locking block 81 until the fixing hole 82 is positioned right above the threaded pin 85, and finally screwing the locking nut 84 on the threaded pin 85 to finish splicing of the drill rods; when the drill rod is detached, the locking nut 84 on the threaded pin 85 is loosened, the threaded pin 85 falls into the threaded pin avoidance hole 86, the locking block 81 is rotated to be far away from the upper end of the bolt 83, the second connector 30 is rotated until the fourth anti-falling block 34 is positioned under the first clamping groove 26, and finally the second connector 30 is pulled out of the first connector 20.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The utility model provides a drilling rod of easy dismouting which characterized in that includes:
a body;
the first connector is arranged at one end of the body, a first clamping part is arranged on the first connector, and the first clamping part is arranged on the inner wall of the first connector;
the second connector is arranged at the other end of the body, a second clamping part is arranged on the second connector, the second clamping part is arranged at the outer side of the second connector, and a drill rod to be spliced is connected with the second clamping part through the first clamping part;
the anti-loosening assembly is used for preventing the spliced first clamping part from being separated from the second clamping part;
the first clamping part is provided with a plurality of first clamping grooves, a third anti-falling block is arranged between every two clamping grooves, the first clamping grooves are arranged on the inner wall of the first connector at intervals, the second clamping part is provided with a plurality of fourth anti-falling blocks, the fourth anti-falling blocks are arranged on the outer side of the second connector at intervals, and a second clamping groove is arranged between the fourth anti-falling blocks;
the anti-loosening assembly includes: a plug pin; the thread clearance hole is arranged at the upper end of the first connector; the threaded pin is movably arranged in the threaded clearance hole, and one end of the threaded pin, which is far away from the threaded clearance hole, is provided with an external thread; the locking piece, its one end rotatable install the upper end of first connector, be equipped with the fixed orifices on the locking piece.
2. The drill rod easy to disassemble and assemble as recited in claim 1, wherein said first engaging portion is provided with a plurality of protruding blocks, said protruding blocks are arranged on the inner wall of said first connecting head at intervals, said second engaging portion is provided with a plurality of grooves, and said grooves are arranged on the outer side of said second connecting head at intervals.
3. The drill rod easy to disassemble and assemble according to claim 1, wherein a plurality of first anti-falling blocks are arranged on the first clamping portion, first anti-falling block intervals are arranged on the inner wall of the first connector, a plurality of second anti-falling blocks are arranged on the second clamping portion, second anti-falling block intervals are arranged on the outer side of the second connector, a clamping connector is arranged at one end of the body where the first connector is arranged, and an inner hole consistent with the shape of the clamping connector is arranged inside the second connector.
4. The drill rod of claim 2, wherein the anti-loosening assembly is provided with a pressure plate disposed at an end of the second connector adjacent to the body, the pressure plate being detachably mounted at an end of the first connector remote from the body.
5. A readily removable drill rod as claimed in claim 3, wherein the anti-loosening assembly comprises:
a jack disposed at the bottom of the first connector;
and the clamping plate is inserted into the jack.
6. The drill rod easy to disassemble and assemble as recited in claim 2, wherein a fixed clamping ring is arranged on the outer side of the body, a first air pipe mounting hole is formed in the fixed clamping ring, and a first air pipe is inserted into the first air pipe mounting hole.
7. An easily detachable drill rod according to any one of claims 3 to 4, wherein the first connector and the second connector are provided with second air pipe through holes, and the second air pipe through holes are inserted with second air pipes.
8. The easy-to-disassemble drill pipe of claim 6, wherein said first air pipe ends are each provided with a connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134747.6A CN112855037B (en) | 2021-01-29 | 2021-01-29 | Drill rod easy to disassemble and assemble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134747.6A CN112855037B (en) | 2021-01-29 | 2021-01-29 | Drill rod easy to disassemble and assemble |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112855037A CN112855037A (en) | 2021-05-28 |
| CN112855037B true CN112855037B (en) | 2023-08-01 |
Family
ID=75987351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110134747.6A Active CN112855037B (en) | 2021-01-29 | 2021-01-29 | Drill rod easy to disassemble and assemble |
Country Status (1)
| Country | Link |
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| CN (1) | CN112855037B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201810221U (en) * | 2010-10-18 | 2011-04-27 | 何大鹏 | Buckle type drill rod connector |
| CN203347705U (en) * | 2013-06-13 | 2013-12-18 | 齐迎春 | Drill rod connector |
| CN103953292B (en) * | 2014-03-18 | 2016-09-21 | 齐迎春 | Fastening gapless type tool joint |
| CN111379527A (en) * | 2018-12-28 | 2020-07-07 | 中国石油天然气股份有限公司 | Petroleum drill pipe |
| CN110043197A (en) * | 2019-05-17 | 2019-07-23 | 天明(南京)智能装备科技有限公司 | Interior locking type drilling rod |
-
2021
- 2021-01-29 CN CN202110134747.6A patent/CN112855037B/en active Active
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| Publication number | Publication date |
|---|---|
| CN112855037A (en) | 2021-05-28 |
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