Detachable drill bit and drill rod assembly

Abstract

The utility model relates to the technical field of drill bit and drill rod assemblies, in particular to a detachable drill bit and drill rod assembly which comprises a drill bit body and a drill rod, a positioning rod is fixedly connected to the top end of the drill bit body, the drill rod is arranged on the outer side of the positioning rod, and a pushing limiting assembly used for installing the drill rod is arranged in the drill rod. A discharging mechanism is installed below the pushing limiting assembly. The pushing limiting assembly comprises a hydraulic oil cylinder, the inner side of the hydraulic oil cylinder is fixedly connected with a weak spring, the lower portion of the weak spring is fixedly connected with a first sealing piston, the bottom of the first sealing piston is fixedly connected with a pressure applying rod, and oil pipes are installed on the two sides of the hydraulic oil cylinder. According to the drill bit, rapid and stable connection and disassembly of the drill bit body and the drill rod are achieved, large tools are not needed, operation is easy, convenient and rapid, the maintenance cost is reduced, and the drill bit can meet the requirement of the complex field environment conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drill bit drill rod assembly, concretely is a detachable drill bit drill rod assembly. BACKGROUND

[0002] Drill bit drill rod assembly is the core tool of drilling engineering, is composed of drill bit and drill rod, and the drill bit is located at the front end and breaks rock or soil through cutting teeth; the drill rod is connected by multiple steel pipes, is responsible for transmitting rotary torque and conveying drilling fluid, and the assembly is widely applied to the fields of oil and gas exploitation, geological exploration and building construction, realizes deep drilling operation, the drill bit adopts high-strength alloy material, and complex strata are adapted to; the drill rod inner wall conveys slurry to cool the drill bit and carry the chippings, ensures efficient and safe operation, and its performance directly influences drilling efficiency and engineering quality, is the key equipment of resource development and infrastructure construction, in the current drilling operation, the connecting mode of the drill bit and the drill rod has the vital influence on operation efficiency and equipment maintenance cost;

[0003] In the drilling operation field, the traditional drill bit drill rod assembly has significant disadvantages, and the connecting mode problem is particularly prominent, the traditional drill bit and the drill rod are mostly connected through threads, and the threads are prone to wear and rust and to be contaminated with impurities under the complex environment in the field, which makes disassembly difficult, and large tools are often needed to complete the operation, therefore, the detachable drill bit drill rod assembly is provided for the above problems. Utility model content

[0004] The utility model discloses a detachable drill bit drill rod assembly, to solve the problem that the traditional drill bit and the drill rod are mostly connected through threads, and the threads are prone to wear and rust and to be contaminated with impurities under the complex environment in the field, which makes disassembly difficult, and large tools are often needed to complete the operation.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] The utility model provides a detachable drill head drill rod assembly, including drill head body and drill rod, the top of drill head body is fixedly connected with the positioning rod, the outside of positioning rod is equipped with drill rod, the inside of drill rod is provided with the push limiting component for installing drill rod, the lower portion of push limiting component is equipped with the discharge mechanism, push limiting component includes hydraulic oil cylinder, the inside of hydraulic oil cylinder is fixedly connected with weak spring, the lower portion of weak spring is fixedly connected with first sealing piston, the bottom of first sealing piston is fixedly connected with pressure bar, both sides of hydraulic oil cylinder are equipped with oil pipe, and the opposite side of two oil pipes is fixedly connected with the bolt mechanism of limiting drill rod movement, discharge mechanism includes pressure plate, both sides of pressure plate top are fixedly connected with connecting rod, the top of connecting rod is fixedly connected with second sealing piston, the outside of second sealing piston is slidably connected with the bottom of oil pipe inside, both sides of pressure plate are equipped with outer hole.

[0007] As the further optimization of the utility model, the bolt mechanism includes a sealing seat, one end of the sealing seat is fixedly connected with a contraction spring, a middle part of the sealing seat is slidably connected with a slanted slot sealing rod, a rear end of the slanted slot sealing rod is inclined, a front end of the slanted slot sealing rod is fixedly connected with a connecting disc, the connecting disc is fixedly connected with the contraction spring, and a front end of the connecting disc is fixedly connected with a limiting piece.

[0008] As the further optimization of the utility model, an installation cavity for installing the hydraulic oil cylinder is formed in the inside of the drill rod, a positioning groove is formed at the center of the bottom of the drill rod, the positioning groove is below the installation cavity, and connecting cavities for installing the oil pipes are formed at both sides of the inside of the drill rod.

[0009] As the further optimization of the utility model, the inside of the weak spring is slidably connected with the outside of the first sealing piston, the first sealing piston and the pressure bar are on the same central axis, the pressure bar is in the shape of a three-section cylinder, and the pressure bar is slidably connected with the installation cavity.

[0010] As the further optimization of the utility model, inner holes for adapting to the outer holes are formed at both sides of the bottom end of the drill rod, and a limiting pin is inserted between the outer hole and the inner hole.

[0011] As the further optimization of the utility model, the vertical section of the oil pipe is in the shape of an "L", the inside of the oil pipe is in communication with the inside of the hydraulic oil cylinder, and the bottom end of the oil pipe is slidably connected with the outside of the connecting rod.

[0012] As the further optimization of the utility model, the positioning rod and the drill head body are on the same central axis, key grooves for adapting to the limiting pieces are formed at both sides of the top of the positioning rod, and the positioning rod is slidably connected with the positioning groove.

[0013] Compared with the prior art, the drill bit body and the drill rod are quickly and stably connected and disassembled, compared with the traditional threaded connection, the threaded wear and rust caused by the threaded wear and rust are avoided, large tools are not needed, operation is simple and fast, maintenance cost is reduced, and the needs of complex outdoor environments are met.

[0014] The push limiting assembly, the bolt mechanism and the discharge mechanism are arranged, the drill bit body and the drill rod are quickly and stably connected and disassembled, compared with the traditional threaded connection, threaded wear and rust caused by threaded wear and rust are avoided, large tools are not needed, operation is simple and fast, maintenance cost is reduced, and the needs of complex outdoor environments are met. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole structure schematic view of the utility model;

[0016] Figure 2 It is a cross section structure schematic view of the utility model;

[0017] Figure 3 It is a structure schematic view of the push limiting assembly of the utility model;

[0018] Figure 4 It is a structure schematic view of the utility model Figure 2 A place;

[0019] Figure 5 It is a structure schematic view of the drill rod inside;

[0020] Figure 6 It is a structure schematic view of the positioning rod.

[0021] In the drawing: 1, drill bit body;

[0022] 2, positioning rod;

[0023] 3, drill rod; 31, installation cavity; 32, positioning groove; 33, connecting cavity; 34, inner hole;

[0024] 4, push limiting assembly; 41, hydraulic oil cylinder; 42, weak spring; 43, first sealing piston; 44, pressure rod; 45, oil pipe; 46, bolt mechanism;

[0025] 5, discharge mechanism; 51, pressure plate; 52, connecting rod; 53, second sealing piston; 54, outer hole;

[0026] 6, limiting pin;

[0027] 7, key groove;

[0028] 461, sealing seat; 462, contraction spring; 463, inclined slot sealing rod; 464, connecting disc; 465, limiting piece. DETAILED DESCRIPTION

[0029] Clearly, the described embodiments are merely a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative effort under the premise that no creative effort is made, belong to the scope of protection of the present application.

[0030] It is to be noted that the terms used herein are merely for the purpose of describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a presence of the features, steps, operations, devices, components and / or combinations thereof.

[0031] Please refer to Figures 1-6 The present application provides a technical scheme:

[0032] A detachable drill bit and drill rod assembly, comprising a drill bit main body 1 and a drill rod 3, the top end of the drill bit main body 1 is fixedly connected with a positioning rod 2, the outer side of the positioning rod 2 is provided with the drill rod 3, the inside of the drill rod 3 is provided with a pushing limiting assembly 4 for installing the drill rod 3, and a discharge mechanism 5 is installed below the pushing limiting assembly 4; the pushing limiting assembly 4 comprises a hydraulic oil cylinder 41, the inner side of the hydraulic oil cylinder 41 is fixedly connected with a weak spring 42 which is beneficial to the reset of a first sealing piston 43, the lower side of the weak spring 42 is fixedly connected with the first sealing piston 43, the bottom of the first sealing piston 43 is fixedly connected with a pressure rod 44, the two sides of the hydraulic oil cylinder 41 are both provided with an oil pipe 45, and the corresponding sides of the two oil pipes 45 are both fixedly connected with a bolt mechanism 46 for limiting the movement of the drill rod 3; the discharge mechanism 5 comprises a pressure plate 51, the two sides of the top end of the pressure plate 51 are both fixedly connected with a connecting rod 52, the top end of the connecting rod 52 is fixedly connected with a second sealing piston 53, the outer side of the second sealing piston 53 is slidably connected with the bottom of the inner side of the oil pipe 45, and the two sides of the pressure plate 51 are both provided with an outer hole 54.

[0033] As a further implementation of the scheme, the latch mechanism 46 comprises a sealing seat 461, one end of the sealing seat 461 is fixedly connected with a contraction spring 462, the middle part of the sealing seat 461 is slidably connected with a slanted groove sealing rod 463, the rear end of the slanted groove sealing rod 463 is inclined, such design can effectively push the slanted groove sealing rod 463 to move when hydraulic oil flows in, the front end of the slanted groove sealing rod 463 is fixedly connected with a connecting disc 464, the connecting disc 464 is fixedly connected with the contraction spring 462, the front end of the connecting disc 464 is fixedly connected with a limiting piece 465, the limiting piece 465 plays a key locking role in the installation process of the positioning rod 2, when the positioning rod 2 is moved to the appropriate position, the limiting piece 465 can be quickly embedded into the key groove 7, so as to realize the stable connection between the positioning rod 2 and the drill rod 3, when disassembling, the pulling force of the contraction spring 462 makes the slanted groove sealing rod 463 reset, and the limiting piece 465 is separated from the key groove 7, which creates conditions for the separation of the drill bit main body 1 and the drill rod 3;

[0034] As a further implementation of the scheme, the inside of the drill rod 3 is provided with an installation cavity 31 for installing the hydraulic oil cylinder 41, the center of the bottom of the drill rod 3 is provided with a positioning groove 32, the positioning groove 32 is located below the installation cavity 31, the inside of the drill rod 3 is provided with a connecting cavity 33 on both sides for installing the oil pipe 45, the bottom end of the drill rod 3 is provided with an inner hole 34 on both sides for adapting to the outer hole 54, the limiting pin 6 is inserted between the outer hole 54 and the inner hole 34, the limiting pin 6 locks the discharge mechanism 5 and the drill rod 3 together, so as to ensure that the discharge mechanism 5 does not move accidentally during normal operation, when disassembling, the limiting pin 6 is pulled out, and the discharge mechanism 5 can push the drill bit main body 1 to move downward, so as to realize the separation of the drill bit main body 1 and the drill rod 3;

[0035] As a further implementation of the scheme, the inside of the weak spring 42 is slidably connected with the outside of the first sealing piston 43, the first sealing piston 43 is on the same displacement axis as the pressure applying rod 44, the pressure applying rod 44 is in the shape of a three-section cylinder, the pressure applying rod 44 is slidably connected with the installation cavity 31, the three-section cylindrical shape of the pressure applying rod 44 increases the contact area between the pressure applying rod 44 and the installation cavity 31, and improves the stability during sliding, and such shape design is also convenient for positioning and assembly during manufacturing and installation.

[0036] As a further implementation of the scheme, the vertical cross-sectional shape of the oil pipe 45 is "L" type, the inside of the oil pipe 45 is in communication with the inside of the hydraulic oil cylinder 41, the bottom end of the oil pipe 45 is slidably connected with the outside of the connecting rod 52, the "L" type oil pipe 45 provides a specific path for the delivery of hydraulic oil, which can effectively guide the hydraulic oil in the hydraulic oil cylinder 41 into the latch mechanism 46 and push the slanted groove sealing rod 463 to move, at the same time, the "L" type design also makes the oil pipe 45 better adapt to the space layout inside the drill rod 3, reasonably utilizes the space inside the drill rod 3, and avoids interference with other components.

[0037] As a further implementation of the scheme, the positioning rod 2 is located on the same central axis as the drill bit body 1, and the top of the positioning rod 2 is provided with a key groove 7 on both sides, which is fitted with a limiting piece 465. The positioning rod 2 is in sliding connection with the positioning groove 32. During installation, when the positioning rod 2 is moved to the appropriate position, the limiting piece 465 can quickly fit into the key groove 7, realizing the locking connection of the positioning rod 2 and the drill rod 3.

[0038] Workflow: When installing the drill bit and drill rod assembly, the operator pushes the drill bit body 1 and the positioning rod 2 upward through external equipment such as a manual lever or an electric push rod. The positioning groove 32 provides a moving path for the upward movement of the positioning rod 2, ensuring stability during movement. As the positioning rod 2 moves upward, it pushes the upper pressure rod 44 and the first sealing piston 43 to move synchronously. The pressure rod 44 is in sliding connection with the installation cavity 31, ensuring the stability of the upward movement of the pressure rod 44 and avoiding the left and right shaking of the first sealing piston 43 during movement. The first sealing piston 43 exerts pressure on the hydraulic oil inside the weak spring 42, prompting the hydraulic oil to quickly flow into the oil pipes 45 on both sides. The L-shaped oil pipes 45 provide a path for the hydraulic oil to be transported. Finally, the hydraulic oil enters the rear end of the slanted groove sealing rod 463. As the pressure increases, the slanted groove sealing rod 463 moves away from the sealing seat 461. The slanted groove sealing rod 463 drives the front connecting disc 464 and the limiting piece 465 to move synchronously. When the key groove 7 of the positioning rod 2 moves to the position corresponding to the limiting piece 465, the limiting piece 465 quickly fits into the key groove 7, thereby quickly completing the installation and fixation of the positioning rod 2.

[0039] When disassembling the drill bit and drill rod assembly, the worker pulls out the limiting pin 6 inserted between the outer hole 54 and the inner hole 34. The pulling out of the limiting pin 6 releases the locking state between the ejection mechanism 5 and the drill bit body 1, no longer limiting the position of the pressure plate 51. This allows the second sealing piston 53 inside the oil pipe 45 to slide up and down. At this time, the hydraulic oil in the oil pipe 45 can quickly push the second sealing piston 53 to move downward. The second sealing piston 53 pushes the connecting rod 52 to move synchronously, which makes the pressure plate 51 quickly push the drill bit body 1 below. It needs to be supplemented that the contraction spring 462 is in a contracted state in the natural state. The contraction spring 462 can apply tension to the connecting disc 464, prompting the slanted groove sealing rod 463 to reset. The limiting piece 465 is disengaged from the key groove 7, releasing the restriction on the positioning rod 2, prompting the pressure plate 51 to push the drill bit body 1 to move downward. The moving path of the connecting rod 52 is long, and the second sealing piston 53 moves to the lowest point inside the oil pipe 45, so that the positioning rod 2 can completely disengage from the contact part of the positioning groove 32, thereby completing the quick disassembly of the drill bit body 1 and the drill rod 3.

[0040] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable drill bit shank assembly comprising a drill bit body (1) and a shank (3), characterized in that: The top end of the drill bit body (1) is fixedly connected with a positioning rod (2), the outer side of the positioning rod (2) is provided with a drill rod (3), the inside of the drill rod (3) is provided with a pushing limiting assembly (4) for installing the drill rod (3), and the lower portion of the pushing limiting assembly (4) is provided with an exhaust mechanism (5). The pushing limiting assembly (4) comprises a hydraulic oil cylinder (41), the inner side of the hydraulic oil cylinder (41) is fixedly connected with a weak spring (42), the lower portion of the weak spring (42) is fixedly connected with a first sealing piston (43), the bottom of the first sealing piston (43) is fixedly connected with a pressure rod (44), and the two sides of the hydraulic oil cylinder (41) are both provided with an oil pipe (45), and the corresponding sides of the two oil pipes (45) are both fixedly connected with a bolt mechanism (46) for limiting the movement of the drill rod (3). The exhaust mechanism (5) comprises a pressure plate (51), the two sides of the top end of the pressure plate (51) are both fixedly connected with a connecting rod (52), the top end of the connecting rod (52) is fixedly connected with a second sealing piston (53), the outer side of the second sealing piston (53) is slidably connected with the bottom of the inner side of the oil pipe (45), and the two sides of the pressure plate (51) are both provided with an outer hole (54).

2. A detachable drill bit and drill pipe assembly according to claim 1, wherein: The bolt mechanism (46) comprises a sealing seat (461), one end of the sealing seat (461) is fixedly connected with a contraction spring (462), the middle portion of the sealing seat (461) is slidably connected with a slanted slot sealing rod (463), the rear end of the slanted slot sealing rod (463) is of an inclined structure, the front end of the slanted slot sealing rod (463) is fixedly connected with a connecting disc (464), the connecting disc (464) is fixedly connected with the contraction spring (462), and the front end of the connecting disc (464) is fixedly connected with a limiting piece (465).

3. A detachable drill bit and drill shaft assembly according to claim 1, characterized in that: The inside of the drill rod (3) is provided with an installation cavity (31) for installing the hydraulic oil cylinder (41), the center of the bottom of the drill rod (3) is provided with a positioning groove (32), the positioning groove (32) is located below the installation cavity (31), and the two sides of the inside of the drill rod (3) are provided with a connecting cavity (33) for installing the oil pipe (45).

4. A detachable drill bit and drill pipe assembly according to claim 3, wherein: The inner side of the weak spring (42) is slidably connected with the outer side of the first sealing piston (43), the first sealing piston (43) and the pressure rod (44) are located on the same central axis, the pressure rod (44) is in the shape of a three-section cylinder, and the pressure rod (44) is slidably connected with the installation cavity (31).

5. A detachable drill bit and drill shaft assembly according to claim 1, characterized in that: The two sides of the bottom end of the drill rod (3) are both provided with an inner hole (34) for adapting to the outer hole (54), and the limiting pin (6) is arranged between the outer hole (54) and the inner hole (34).

6. A detachable drill bit and drill shaft assembly according to claim 1, characterized in that: The vertical section shape of the oil pipe (45) is "L" type, the inner side of the oil pipe (45) is connected with the inner side of the hydraulic oil cylinder (41), and the bottom end of the oil pipe (45) is slidably connected with the outer side of the connecting rod (52).

7. A detachable drill bit and drill shaft assembly according to claim 1, characterized in that: The positioning rod (2) is located on the same central axis as the drill bit body (1), key grooves (7) using adaptive limit pieces (465) are formed on both sides of the top of the positioning rod (2), and the positioning rod (2) is in sliding connection with the positioning groove (32).

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