CN113482546A - Positive and negative rotation drill rod - Google Patents
Positive and negative rotation drill rod Download PDFInfo
- Publication number
- CN113482546A CN113482546A CN202110955585.2A CN202110955585A CN113482546A CN 113482546 A CN113482546 A CN 113482546A CN 202110955585 A CN202110955585 A CN 202110955585A CN 113482546 A CN113482546 A CN 113482546A
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- China
- Prior art keywords
- drill rod
- sleeve
- rod body
- reverse thread
- limiting
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- 230000002441 reversible effect Effects 0.000 claims abstract description 82
- 238000005553 drilling Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
- E21B17/042—Threaded
-
- 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
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- 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)
Abstract
The invention relates to a forward and reverse rotation drill rod, which belongs to the technical field of drilling tools and comprises a drill rod body with a central hole, wherein one end of the drill rod body is provided with a male head, a reverse thread sleeve which is connected with the drill rod body in a sliding way is sleeved at the end, one side of the reverse thread sleeve, which is close to the male head, is provided with an internal reverse thread with the opposite turning direction to the thread of the male head and the female head of the drill rod, the internal reverse thread is matched with an external reverse thread arranged at the other end of the drill rod, and the reverse thread sleeve can be connected with the external reverse thread on the other drill rod through the internal reverse thread under the action of external force and is limited to rotate through a pushing mechanism arranged on the drill rod body; the drill rod body is also provided with a limiting sleeve for preventing the reverse threaded sleeve from slipping off from the male head end, and the limiting sleeve is in threaded connection with the drill rod body. According to the invention, the reverse thread sleeve with the thread turning direction opposite to the drill rod turning direction is arranged, so that the drill rod can be prevented from falling off when the drill rod is reversely rotated, the connection strength of the drill rod is improved, the drill rod is easy to process and manufacture, and the production and manufacturing cost is reduced.
Description
Technical Field
The invention belongs to the technical field of drilling tools, and relates to a forward and reverse rotation drill rod.
Background
At present, drill rods used in coal mine underground coal seam drilling operation are generally in conical threaded connection and can only rotate in one direction. When hole collapse and drill embracing occur in the drilling construction engineering, frequent forward and reverse rotation is needed to buffer, loosen and relieve the borehole, and the drill rod is released when the drill rod in common threaded connection rotates reversely, so that the drill falling accident occurs.
In recent years, drill rods capable of running in forward and reverse rotation are developed successively to solve the drilling construction problem, and the following types are mainly adopted: (1) the plug-in type drill rod transmits torque by using a plug-in matching surface and is axially positioned and connected by using a key pin or a screw so as to transmit axial load; (2) after the thread is screwed, the front drill rod and the rear drill rod are matched with the spline to transmit positive and negative rotation torque; (3) the floating axial limiting drill rod automatically completes axial limiting by utilizing the pressure of flushing fluid, and achieves the function of preventing rotation.
The existing drill rod mainly has the following defects: (1) the plug-in type connection gap is large, and the transmission torque is small; (2) in the spline-sleeved drill rod, after the threads are screwed, the spline phase precision of adjacent drill rods is difficult to control, and the connection of the drill rods can be seriously influenced by thread machining errors and abrasion; (3) the floating clamping element of the floating axial limiting drill rod is weak in strength, especially poor in torsional strength, and the connection stability can be seriously influenced by flushing liquid.
Disclosure of Invention
In view of this, the present application provides a drill rod capable of rotating forward and backward to prevent the drill rod from falling off when the drill rod rotates backward, and to improve the connection strength of the drill rod.
In order to achieve the purpose, the invention provides the following technical scheme:
a positive and negative rotation drill rod comprises a drill rod body with a central hole, wherein one end of the drill rod body is a male end, the end sleeve is provided with a reverse thread sleeve which is in sliding connection with the drill rod body, one side, close to the male end, of the reverse thread sleeve is provided with an internal reverse thread with the rotation direction opposite to that of a male thread and a female thread of the drill rod, the internal reverse thread is matched with an external reverse thread arranged at the other end of the drill rod, and the reverse thread sleeve can be connected with the external reverse thread arranged on the other drill rod through the internal reverse thread under the action of external force and is limited to rotate through a pushing mechanism arranged on the drill rod body; the drill rod body is also provided with a limiting sleeve for preventing the reverse threaded sleeve from slipping off from the male head end, and the limiting sleeve is in threaded connection with the drill rod body.
Optionally, the pushing mechanism includes a sliding sleeve located on one side of the reverse threaded sleeve away from the male end, the sliding sleeve is sleeved on the drill rod body and can be axially linked with a limiting inner tube located in the drill rod body through a transmission member, the male end of the latter drill rod is used for pushing the limiting inner tube of the former drill rod to achieve forward movement, and when the threads of two adjacent drill rods are screwed, the front end face of the male end of the drill rod body is in contact with the limiting inner tube of the other drill rod.
Optionally, the limit inner tube is connected with a reset mechanism to automatically reset the sliding sleeve after the drill rod is broken out.
Optionally, the reset mechanism is an elastic telescopic mechanism and comprises a spring positioned between the drill rod body and the limiting inner tube, the spring sleeve is arranged on the limiting inner tube, one end close to the sliding sleeve is limited through a spring limiting block arranged on the drill rod body, and the other end of the spring sleeve is limited through a step surface arranged on the limiting inner tube.
Optionally, a spring limiting groove is formed in the circumferential direction of the limiting inner tube, and the spring is located in the spring limiting groove.
Optionally, the driving member includes at least one driving pin, one end of which is fixedly connected to the sliding sleeve, and the other end of which passes through a guide groove formed in the drill rod body and extends into an annular driving pin limiting groove formed around the circumference of the limiting inner tube.
Optionally, the driving member includes a plurality of driving pins, and the driving pins are uniformly distributed in the circumferential direction of the drill rod body.
Optionally, the stop collar is first screwed to the drill rod body and then welded to the drill rod body.
Optionally, the pitch of the internal counter thread and the external counter thread is greater than the thread pitch of the drill rod male and female heads.
The invention has the beneficial effects that:
1. the drill rod connection structure has the advantages that the gapless connection of threads is realized, the adjacent drill rods do not need to strictly control the phase precision, the drill rod connection can be effectively guaranteed after the drill rod threads are worn, and the drill rod connection strength and the reliability are high.
2. The problems of large gap and small torque of the plug-in type drill rod are solved, and the problems of large phase error and poor connection stability of the spline sleeve drill rod and poor strength of the reverse drill rod are also solved.
3. The drill rod is connected by adopting an inner-outer double-layer threaded connection structure, the problem of drill rod connection dislocation caused by torque difference and thread self abrasion during the threaded connection of the male and female heads of the drill rod in the existing insertion connection structure is avoided, the requirement on processing is relatively low, the structure is relatively simple, the processing and the manufacturing are easy, and the production and manufacturing cost is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural view of a forward and reverse rotating drill rod of the present invention;
FIG. 2 is a schematic structural view of a drill rod body;
FIG. 3 is a schematic structural view of the sliding sleeve;
fig. 4 is a schematic structural diagram of the limiting inner tube.
Reference numerals: the drill rod comprises a drill rod body 1, a limiting sleeve 2, a reverse threaded sleeve 3, a transmission pin 4, a sliding sleeve 5, a limiting inner tube 6, a spring limiting block 7, a spring 8, a male thread 11, a limiting thread 12, a guide groove 13, a spring limiting groove 14, an outer reverse thread 15, a female thread 16, a square groove 51, an inner hole 61, a transmission pin limiting groove 62 and a step surface 63.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 4, a drill rod capable of rotating in a positive and negative direction comprises a drill rod body 1 with a central hole, wherein one end of the drill rod body 1 is provided with a male head, the end sleeve is provided with a reverse thread sleeve 3 which is in sliding connection with the drill rod body 1, one side of the reverse thread sleeve 3, which is close to the male head, is provided with an internal reverse thread with the rotation direction opposite to that of the male head and the female head of the drill rod, the internal reverse thread is matched with an external reverse thread 15 arranged at the other end of the drill rod, and the reverse thread sleeve 3 can be connected with the external reverse thread 15 on the other drill rod through the internal reverse thread under the action of external force and is limited to rotate through a pushing mechanism arranged on the drill rod body 1; the drill rod body 1 is also provided with a limiting sleeve 2 for preventing the reverse thread sleeve 3 from slipping from the male head end.
According to the invention, the reverse thread sleeve 3 with the thread turning direction opposite to the thread turning direction of the male and female heads of the drill rod is arranged, so that the drill rod can be prevented from falling off when being reversely rotated, and the connection strength of the drill rod is improved.
Optionally, the pushing mechanism includes a sliding sleeve 5 located on one side of the reverse threaded sleeve 3 away from the male end, the sliding sleeve 5 is sleeved on the drill rod body 1 and can be axially linked with a limiting inner tube 6 located in the drill rod body 1 along a drill rod through a transmission member, the male end of the latter drill rod is used for pushing the limiting inner tube 6 of the former drill rod to move forwards, and when two adjacent drill rod threads are screwed, the front end face of the male end of the drill rod body 1 is in contact with the limiting inner tube 6 of the other drill rod.
Optionally, the limit inner pipe 6 is connected with a reset mechanism to automatically reset the sliding sleeve 5 after the drill rod is broken out.
Optionally, the reset mechanism is an elastic telescopic mechanism and comprises a spring 8 located between the drill rod body 1 and the limiting inner tube 6, the spring 8 is sleeved on the limiting inner tube 6, one end close to the sliding sleeve 5 is limited by a spring limiting block 7 arranged on the drill rod body 1, and the other end is limited by a step surface 63 arranged on the limiting inner tube 6.
Optionally, a spring limiting groove 14 is formed in the limiting inner tube 6 in the circumferential direction, and the spring 8 is located in the spring limiting groove 14.
Optionally, the transmission member includes at least one transmission pin 4, one end of which is fixedly connected with the sliding sleeve 5, and the other end of which passes through a guide groove 13 formed on the drill rod body 1 and extends into an annular transmission pin limiting groove 62 formed around the circumference of the limiting inner pipe 6; the cross-section of the driving pin 4 may be rectangular or circular.
Optionally, the transmission member includes a plurality of transmission pins 4, and the transmission pins 4 are uniformly distributed in the circumferential direction of the drill rod body 1.
Optionally, a limit thread 12 is arranged at the position, adjacent to the drill rod male thread 11, of the drill rod body 1, and the limit sleeve 2 is in threaded connection with the drill rod body 1 through the limit thread 12 and is welded with the drill rod body into a whole.
Optionally, the pitch of the internal and external counter threads 15 is greater than the thread pitch of the drill rod pin and box.
Examples
A drill rod capable of rotating forward and backward comprises a drill rod body 1, a limiting sleeve 2, a reverse threaded sleeve 3, a transmission pin 4, a sliding sleeve 5, a limiting inner pipe 6, a spring limiting block 7 and a spring 8. The detailed structure and relative position relationship of each part are as follows:
the drill rod body 1: the drill rod body is used for bearing the torque in drilling and is also used as a carrier of threaded connection; both ends are respectively provided with a male thread 11 and a female thread 16; the connection of the drill rods and the transmission of torque are realized by screwing the male threads 11 and the female threads 16 between the adjacent drill rods.
The front end of the drill rod body 1 is provided with a limiting thread 12 adjacent to the male thread 11 so as to be in threaded connection with the limiting sleeve 2, and after the reverse threaded sleeve 3 is arranged, the drill rod body 1 is in threaded connection with the limiting sleeve 2 and then is welded into a whole.
The tail end circumference of drilling rod body 1 is equipped with outer anti-thread 15 for connect soon with the reverse thread bush 3 of adjacent drilling rod, and for avoiding the spacing thrust of axial too big, the pitch of outer anti-thread 15 is far greater than the screw thread pitch of drilling rod pin and box.
And (3) a limiting sleeve 2: the inner hole 61 is a thread, is connected with the drill rod body 1 in a screwing mode and is welded into a whole, the limiting of the reverse threaded sleeve 3 is completed, and the reverse threaded sleeve 3 is prevented from sliding out.
And (3) limiting the inner tube 6: the sliding connection is in the centre bore of drilling rod body 1, and the drilling rod is connected the back, and the front end of the back drilling rod withstands spacing inner tube 6 rear end to restrict reverse thread cover 3 back through driving pin 4 and sliding sleeve 5, thereby restrict reverse thread cover 3 and rotate. The inner hole 61 of the inner limiting pipe 6 is a flushing liquid channel.
Reverse thread bush 3: the reverse thread sleeve 3 is sleeved on the drill rod body 1, and after the drill rod is screwed in the forward direction, the reverse thread sleeve is screwed with the external reverse thread 15 positioned at the tail end of the other drill rod; when the drill rod rotates reversely, the drill rod is tightly connected with the drill rod body 1, and when the drill rod rotates forwardly, the drill rod cannot rotate under the action of the sliding sleeve 5 and the limiting inner pipe 6, so that the threaded connection is kept from loosening.
The driving pin 4: one end of the drill rod is inserted into a square groove 51 arranged on the sliding sleeve 5 and welded with the square groove into a whole, and the other end of the drill rod penetrates through a guide groove 13 arranged on the drill rod body 1 and extends into an annular transmission pin limiting groove 62 arranged around the circumference of the limiting inner pipe.
A sliding sleeve 5: the transmission pin 4 is linked with the limiting inner tube 6, and under the action of the limiting inner tube 6, the axial movement of the reverse threaded sleeve 3 is limited, so that the reverse threaded sleeve 3 is limited to rotate, and a drill rod is locked and connected.
And (4) a spring 8: after compression, a driving force for resetting the limiting inner tube 6 is provided, and when the rear end drill rod is loosened, the limiting inner tube 6 automatically resets.
Spring stopper 7: the limiting device is used for limiting the spring 8, one end of the limiting device is inserted into a connecting hole 14 formed in the drill rod body 1 and is fixedly connected with the connecting hole: the other end of the spring extends into a spring limit groove arranged on the drill rod body 1. The spring stop 7 may be welded to the drill rod body 1.
The using method of the invention is as follows:
connecting drill rods:
(1) the male threads 11 and the female threads 16 of adjacent drill rods are aligned and screwed firmly;
(2) screwing the reverse thread sleeve 3 to the external reverse thread 15 at the tail end of the drill rod, and screwing firmly;
(3) the next drill rod in the two adjacent drill rods is connected with the next drill rod in a rotating mode, the male head of the next drill rod tightly pushes the limiting inner tube 6 of the middle drill rod, and the reverse threaded sleeve 3 is guaranteed not to rotate;
(4) and (4) connecting the drill rods in sequence according to the steps (2) to (3).
Disassembling the drill rod:
(1) the next drill rod of the adjacent drill rod is removed, the limit inner pipe 6 of the previous drill rod moves backwards and resets under the action of the spring 8, and the sliding sleeve 5 is driven to move backwards;
(2) screwing out the reverse thread sleeve 3;
(3) reversely rotating the drill rod body 1 to realize the disassembly of the adjacent drill rods;
(4) and (4) disassembling the drill rod in sequence according to the steps (2) to (3).
According to the invention, two sets of drill rods are connected in a mode that the rotating directions of the internal thread and the external thread are opposite, the limit inner pipe 6 of the previous drill rod is driven to move forwards by utilizing the screwing of the next drill rod, the axial movement of the reverse thread sleeve 3 positioned on the outer side is limited, and the reverse thread sleeve 3 is prevented from loosening during forward rotation, so that the male thread 11 and the female thread 16 of the drill rod body are automatically connected during forward rotation, and the reverse thread sleeve 3 is locked with the external reverse thread 15 of the drill rod body 1 during reverse rotation, and the drill rod thread connection transmission torque is large. Because reverse thread bush 3 is automatic to be connected, avoided the spline shell type not only to guarantee threaded connection, still guaranteed spline phase place complex difficult point, threaded connection has the effect of self-eliminating clearance simultaneously, has guaranteed the compact type of connection, has that the transmission moment of torsion is big, and the processing degree of difficulty is little, and screw thread wearing and tearing do not influence the characteristics of the compactness of connecting.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (9)
1. A drill rod capable of rotating forward and backward is characterized in that: the drill rod comprises a drill rod body with a central hole, wherein one end of the drill rod body is a male end, the end sleeve is provided with a reverse thread sleeve which is in sliding connection with the drill rod body, one side, close to the male end, of the reverse thread sleeve is provided with an internal reverse thread with the rotation direction opposite to that of a male end and a female end of the drill rod, the internal reverse thread is matched with an external reverse thread arranged at the other end of the drill rod, and the reverse thread sleeve can be connected with the external reverse thread arranged on the other drill rod through the internal reverse thread under the action of external force and is limited to rotate through a pushing mechanism arranged on the drill rod body; the drill rod body is also provided with a limiting sleeve for preventing the reverse threaded sleeve from slipping off from the male head end, and the limiting sleeve is in threaded connection with the drill rod body.
2. A reversible drill rod according to claim 1, characterized in that: the pushing mechanism comprises a sliding sleeve which is positioned on one side, far away from the male end, of the reverse threaded sleeve, the sliding sleeve is sleeved on the drill rod body and can be axially linked with a limiting inner pipe positioned in the drill rod body through a transmission piece, the forward movement is realized by utilizing the male end of a later drill rod to push the limiting inner pipe of the former drill rod, and when threads of two adjacent drill rods are screwed, the front end face of the male end of the drill rod body is in contact with the limiting inner pipe of the other drill rod.
3. A reversible drill rod according to claim 2, characterized in that: the limiting inner pipe is connected with a reset mechanism so that the sliding sleeve automatically resets after the drill rod is broken out.
4. A reversible drill rod according to claim 3, characterized in that: the reset mechanism is an elastic telescopic mechanism and comprises a spring positioned between the drill rod body and a limiting inner tube, the spring sleeve is arranged on the limiting inner tube, one end close to the sliding sleeve is limited through a spring limiting block arranged on the drill rod body, and the other end of the spring sleeve is limited through a step surface arranged on the limiting inner tube.
5. A reversible drill rod according to claim 4, characterized in that: and a spring limiting groove is formed in the circumferential direction of the limiting inner pipe, and the spring is positioned in the spring limiting groove.
6. A reversible drill rod according to claim 2, characterized in that: the driving medium includes at least one driving pin, and one end and sliding sleeve fixed connection, the other end pass set up the guide way on the drilling rod body and stretch into around spacing inner tube circumference seted up be annular driving pin spacing inslot.
7. A reversible drill rod according to claim 6, characterized in that: the driving medium includes a plurality of driving pins, and the driving pin equipartition is in the circumference of drilling rod body.
8. A reversible drill rod according to claim 1, characterized in that: the limiting sleeve is connected with the drill rod body through threads and then welded with the drill rod body into a whole.
9. A reversible drill rod according to claim 1, characterized in that: the thread pitch of the internal reverse thread and the external reverse thread is larger than that of the drill rod male and female heads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110955585.2A CN113482546B (en) | 2021-08-19 | 2021-08-19 | Forward and reverse rotation drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110955585.2A CN113482546B (en) | 2021-08-19 | 2021-08-19 | Forward and reverse rotation drill rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113482546A true CN113482546A (en) | 2021-10-08 |
| CN113482546B CN113482546B (en) | 2023-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110955585.2A Active CN113482546B (en) | 2021-08-19 | 2021-08-19 | Forward and reverse rotation drill rod |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178319B (en) * | 2016-03-10 | 2020-04-24 | 周兆弟 | Novel drilling rod assembly device |
| CN208619054U (en) * | 2018-06-15 | 2019-03-19 | 焦作市恒利水文地质工程有限责任公司 | A kind of probing positive and negative rotation double-purpose drilling tool |
| CN112343521B (en) * | 2020-10-18 | 2023-06-09 | 中煤科工集团重庆研究院有限公司 | Ratchet self-locking type drilling rod capable of rotating positively and negatively |
| CN112576203B (en) * | 2020-10-18 | 2023-06-23 | 中煤科工集团重庆研究院有限公司 | Self-locking drilling rod capable of rotating positively and negatively |
| CN112360354B (en) * | 2020-11-29 | 2023-03-14 | 重庆梅安森科技股份有限公司 | Mining drill rod assembly capable of rotating forwards and backwards |
| CN215332708U (en) * | 2021-08-19 | 2021-12-28 | 中煤科工集团重庆研究院有限公司 | Positive and negative rotation drill rod |
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| CN113482546B (en) | 2023-10-24 |
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