Equipment for grabbing drill rod and automatically unhooking

Abstract

The invention discloses drilling rod grabbing and automatic unhooking equipment, and relates to the technical field of drilling equipment. The equipment for grabbing the drill rod and automatically unhooking comprises a connector, the connector is provided with a connecting rod and a rotating mechanism, the connecting rod is provided with a mounting table, the mounting table is provided with a vertical gear around the connecting rod, the vertical gear is fixedly connected with a grabbing hook, the rotating mechanism is in threaded connection with a lifting rod, and the lifting rod is connected with the rotating mechanism. The lifting rod is provided with a rack connected with the vertical gear in a matched mode, and the connecting rod is provided with a positioning head aligned with a drill rod. The equipment for grabbing the drill rod and automatically unhooking controls the grabbing hooks to be closed and opened through the rotating mechanism, and has the beneficial effects that clamping is convenient, and the drill rod is not damaged.

Description

Technical Field

[0001] The invention relates to the technical field of drilling equipment, in particular to a device for grabbing a drill rod and automatically unhooking. Background Art

[0002] Drilling rigs are widely used in mining, geotechnical engineering construction, and geotechnical foundation construction of buildings and roads. The drill rod is a steel pipe with threads on both ends, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or bottom hole device at the bottom of the well. When a water well drilling rig or a reverse circulation drilling rig is drilling, it is necessary to drill through the drill rod. During the drilling process, it is not uncommon for the drill rod to break due to improper operation, geological factors, or other reasons such as drill rod quality problems, and part of the drill rod to be left in the borehole. In order not to affect the continued drilling of the well, the broken drill rod needs to be removed.

[0003] After the drill rod falls, it cannot be fixed and taken out manually. Among the commonly used methods, one is to use a male cone or a female cone to attack the broken drill rod, thereby connecting with the broken drill rod and finally taking out the drill rod. Since there is mud water in the borehole, the broken drill rod is relatively slippery, and it is very difficult for the male cone or the female cone to attack the broken drill rod; the second is to use a crushing drill bit to directly crush the broken drill rod, which will cause a waste of drill rod materials and easily damage the borehole during the crushing process.

[0004] Therefore, the prior art needs to be improved. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing technology is difficult to remove broken drill rods and crushes and damages holes. The purpose is to provide a device for grabbing drill rods and automatically unhooking. The corresponding technical solution is adopted, which has the beneficial effects of easy clamping and no damage to the drill rod.

[0006] The present invention is achieved through the following technical solutions:

[0007] A device for grabbing a drill pipe and automatically unhooking, comprising a connecting head, the connecting head is provided with a connecting rod and a rotating mechanism, the connecting rod is provided with a mounting platform, the mounting platform is provided with a vertical gear around the connecting rod, the vertical gear is fixedly connected with a grab hook, the rotating mechanism is threadedly connected with a lifting rod, the lifting rod is provided with a rack matched with the vertical gear, and the connecting rod is provided with a positioning head aligned with the drill pipe.

[0008] Furthermore, in the present invention, the above-mentioned rotating mechanism includes a driving motor connected to the connecting head, the driving motor is transmission-connected with a gear sleeve 1, the connecting rod sleeve is provided with a support bearing, the support bearing is connected with a gear sleeve 2, the gear sleeve 2 is aligned and fitted with the gear sleeve 1, the connecting head is provided with a chamber, a movable plate is provided in the chamber, and the connecting rod is connected to the movable plate.

[0009] Furthermore, in the present invention, when the movable plate moves to the upper limit of the chamber, the gear sleeve 2 is meshed with the gear sleeve 1; when the movable plate moves to the lower limit of the chamber, the gear sleeve 2 is disengaged from the gear sleeve 1.

[0010] Furthermore, in the present invention, a threaded ring sleeve is provided at the top of the lifting rod, and the threaded ring sleeve is threadedly connected to the gear sleeve.

[0011] Furthermore, in the present invention, the threaded ring sleeve is provided with an external thread, and the gear sleeve 2 is provided with an internal thread meshing with the external thread.

[0012] Furthermore, in the present invention, the connecting rod is connected to a limiting rod for limiting the horizontal movement of the lifting rod, and the limiting rod is provided with a limiting hole for the lifting rod to pass through.

[0013] Furthermore, in the present invention, a claw is provided at one end of the grab hook, and a rotating rod is connected to the other end of the claw via bolts, and the rotating rod is fixedly connected to the vertical gear.

[0014] Furthermore, in the present invention, the positioning head is configured as a conical head.

[0015] Furthermore, in the present invention, a connecting column is provided at the top of the connecting head, and the connecting column is provided with a connecting thread.

[0016] Furthermore, in the present invention, the plurality of grab hooks are evenly distributed around the positioning head.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] The device for grabbing drill rods and automatically unhooking the drill rod of the present invention is sent into the borehole by the drilling equipment when in use. During the descent process, the positioning head first contacts the drill rod and is positioned and connected with the joint of the drill rod in the hole. After positioning, the rotating mechanism starts to work, and the lifting rod moves upward through the cooperation of the threaded connection. Since the rack and the vertical gear are meshed with each other, the vertical gears rotate with each other after the rack moves upward, thereby driving the lower end of the grab hook to move closer to the middle, and the drill rod is tightly grasped. After grasping, it is lifted to take out the remaining drill rod in the hole. During the entire grasping process, there is no need to destroy the drill rod, no waste will be generated, and the borehole will not be damaged during the grasping process. A clamping method is adopted in the grasping process, and there is no need to be threadedly connected to the drill rod. The slippery mud will not affect the grasping of the drill rod, so it also has the advantage of convenient clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 It is a schematic diagram of the structure of the present invention when the joint of the drill pipe is opened;

[0021] Figure 2 It is a schematic diagram of the structure of the present invention when the joint of the drill pipe is closed;

[0022] Figure 3 It is a schematic diagram of the structure of the present invention when the drill pipe joint is opened when there is no joint;

[0023] Figure 4 It is a schematic diagram of the closed structure of the present invention when the joint of the drill pipe does not exist.

[0024] The marks and corresponding parts names in the accompanying drawings are: 1-connecting head, 101-connecting rod, 102-positioning head, 103-chamber, 104-movable plate, 105-connecting column, 106-connecting thread, 2-rotating mechanism, 201-driving motor, 202-gear sleeve one, 3-mounting table, 301-vertical gear, 4-grab hook, 401-claw, 402-bolt, 403-rotating rod, 5-lifting rod, 501-rack, 502-threaded ring sleeve, 6-limiting rod, 601-limiting hole, 7-support bearing, 701-gear sleeve two. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation mode of the present invention and its description are only used to explain the present invention and are not intended to limit the present invention. The following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar numbers and letters represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0027] Example

[0028] Combination Figure 1 and Figure 2 As shown, Embodiment 1 of the present invention provides a device for grabbing a drill pipe and automatically unhooking, and the specific structure is described as follows.

[0029] Reference Figure 1 As shown, the device for grabbing drill rods and automatically unhooking includes a connector 1 located at the top, and the connector 1 is used to connect with the drilling equipment. After the connection, the drilling equipment can conveniently send the device for grabbing drill rods and automatically unhooking into the borehole to grab the drill rod. The connector 1 is cylindrical, and a cylindrical connecting column 105 is fixedly installed on the top of the connector 1. The surface of the connecting column 105 is provided with a connecting thread 106. Through the connecting thread 106 of the connecting column 105, it can be detachably connected with the drilling equipment, which is very convenient to use.

[0030] Further, combined with Figure 1 As shown, the connecting rod 101 is a vertical metal rod, and the connecting rod 101 is fixed at the bottom center of the connector 1. The rotating mechanism 2 is installed on the connector 1, and the rotating mechanism 2 can realize rotating motion after working. The mounting platform 3 is a metal cross bar fixed on the connecting rod 101, and the inner end of the mounting platform 3 can be fixedly connected by welding.

[0031] It should be noted that the positioning head 102 is installed at the bottom end of the connecting rod 101 and is used to position the top end of the drill rod.

[0032] In some implementations of this embodiment, Figure 1 As shown, this embodiment 1 is equipped with four mounting platforms 3, and correspondingly equipped with four vertical gears 301 and four grab hooks 4, which are evenly distributed around the connecting rod 101. The vertical gear 301 is installed at the outer end of the mounting platform 3, and the vertical gear 301 can rotate, and the top of the grab hook 4 is fixedly connected to the vertical gear 301. When the vertical gear 301 rotates synchronously, the four grab hooks 4 can be closed or opened, which is convenient for grabbing the drill rod and automatically unhooking.

[0033] Further, combined with Figure 1 As shown, the bottom end of the lifting rod 5 is connected to a rack 501, and the rack 501 is meshed with the inner side of the vertical gear 301. When the lifting rod 5 and the rack 501 move upward, the four hooks 4 are closed, and when the lifting rod 5 and the rack 501 move downward, the four hooks 4 are opened.

[0034] It should be noted that, combined with Figure 1 As shown, the top of the lifting rod 5 and the bottom of the rotating mechanism 2 are connected in a threaded manner.

[0035] Combination Figure 1 As shown, when the rotating mechanism 2 is started to rotate, the lifting rod 5 is raised or lowered through threaded engagement, thereby driving the grab hook 4 to close or open.

[0036] Example 2

[0037] This embodiment is further optimized on the basis of Embodiment 1, and the specific structure is described as follows.

[0038] Combination Figure 1 and Figure 2 As shown, the rotating mechanism 2 mainly includes a driving motor 201 and a gear sleeve 202. The gear sleeve 202 is in the shape of a circular sleeve, and the teeth are located at the bottom of the gear sleeve 202. The gear sleeve 202 is sleeved at the bottom of the connector 1, and the rotation connection between the gear sleeve 202 and the connector 1 is achieved by installing a bearing sleeve. The driving motor 201 installed on the connector 1 is in transmission connection with the gear sleeve 202, and the gear sleeve 202 can be driven to rotate in a gear transmission manner.

[0039] Further, combined with Figure 1 As shown, the support bearing 7 is installed on the connecting rod 101, and the gear sleeve 2 701 is connected to the support bearing 7. The teeth of the gear sleeve 2 701 are located at the top, and the gear sleeve 2 701 is aligned with the gear sleeve 1 202 on the upper side.

[0040] In some implementations of this embodiment, a rectangular chamber 103 is provided inside the connector 1, and a movable plate 104 is installed inside the chamber 103, and the movable plate 104 can slide up and down along the chamber 103. The top of the connecting rod 101 passes through the bottom end of the connector 1 and extends into the chamber 103, and is fixedly connected to the bottom end of the movable plate 104.

[0041] After the equipment for grabbing the drill rod and automatically unhooking is positioned by the positioning head 102, it continues to move downward, and the connector 1 moves downward until the movable plate 104 moves to the upper limit (i.e., the top) of the chamber 103, at which time the second gear sleeve 701 is engaged with the first gear sleeve 202. When the equipment for grabbing the drill rod and automatically unhooking rises, the connector 1 moves upward until the movable plate 104 moves to the lower limit (i.e., the bottom) of the chamber 103, at which time the second gear sleeve 701 is out of contact with the first gear sleeve 202.

[0042] Example 3

[0043] This embodiment is further optimized on the basis of Embodiment 2, and the specific structure is described as follows.

[0044] Combination Figure 1 As shown, the tops of the four lifting rods 5 are connected with a threaded sleeve 502, the threaded sleeve 502 has an external thread, the bottom of the gear sleeve 701 is provided with an internal thread, and the threaded sleeve 502 and the gear sleeve 701 are threadedly connected by the meshing of the external thread and the internal thread.

[0045] Further, combined with Figure 1 As shown, four limit rods 6 are fixedly connected to the connecting rod 101, and a vertical limit hole 601 is formed at the outer end of the limit rod 6, and the four lifting rods 5 respectively pass through the four limit holes 601. Through the limiting effect of the limit rod 6 and the limit hole 601, it is ensured that the lifting rod 5 can only perform vertical lifting movement and cannot move horizontally.

[0046] When the second gear sleeve 701 rotates, since the threaded sleeve 502 cannot rotate, it will drive the threaded sleeve 502 to rise or fall, thereby driving the lifting rod 5 to rise or fall.

[0047] Example 4

[0048] This embodiment is further optimized on the basis of Embodiment 1, and the specific structure is described as follows.

[0049] Combination Figure 1 As shown, the lower end of the grab hook 4 is provided with a hook claw 401, and the hook claw 401 faces the middle positioning head 102, so as to hook the joint of the drill pipe. A rotating rod 403 is rotatably connected to the upper end of the grab hook 4, and a bolt 402 passes through the rotating rod 403 and the grab hook 4. After the bolt 402 is loosened, the rotating rod 403 and the grab hook 4 can adjust the angle, so as to adjust the opening angle of the grab hook 4. After the bolt 402 is tightened, the rotating rod 403 and the grab hook 4 are fixed and cannot move.

[0050] Example 5

[0051] This embodiment is further optimized on the basis of Embodiment 1, and the specific structure is described as follows.

[0052] like Figure 1 As shown, the positioning head 102 is a conical head, which is easy to insert into the top end of the drill rod and has a better positioning effect.

[0053] The working principle of the device for grabbing the drill rod and automatically unhooking the drill rod of the present invention is as follows:

[0054] Combination Figure 1 and Figure 2 The figure shows a schematic diagram of grabbing a drill rod with a joint. When in use, the equipment for grabbing the drill rod and automatically unhooking is sent into the borehole by the drilling equipment. During the descent process, the positioning head 102 first contacts the drill rod and is positioned and connected with the joint of the drill rod in the hole. After positioning, the gear sleeve 1 202 falls and meshes with the gear sleeve 2 701. The drive motor 201 starts to work and drives the gear sleeve 1 202 and the gear sleeve 2 701 to rotate in one direction. The lifting rod 5 and the rack 501 move upward, and the vertical gear 301 rotates synchronously, thereby driving the lower end of the grab hook 4 to move synchronously to the middle to tightly grab the drill rod. Then lift it up to remove the remaining drill rod in the hole.

[0055] Combination Figure 3 and Figure 4 As shown, it is a schematic diagram of grabbing a drill rod without a joint. When in use, the equipment for grabbing the drill rod and automatically unhooking is sent into the borehole by the drilling equipment. During the descent process, the positioning head 102 first contacts the drill rod and is positioned and connected with the joint of the drill rod in the hole. After positioning, the gear sleeve 1 202 falls and meshes with the gear sleeve 2 701. The drive motor 201 starts to work and drives the gear sleeve 1 202 and the gear sleeve 2 701 to rotate in one direction. The lifting rod 5 and the rack 501 move upward, and the vertical gear 301 rotates synchronously, thereby driving the lower end of the grab hook 4 to move synchronously to the middle to tightly grab the drill rod. Then the drilling equipment uses a heavy hammer outside the borehole to make the positioning head 102 drill into the drill rod to expand and deform. Finally, it is lifted to remove the remaining drill rod in the hole.

[0056] In summary, the present invention provides a device for grabbing a drill pipe and automatically unhooking, which includes a connector 1, the connector 1 is provided with a connecting rod 101 and a rotating mechanism 2, the connecting rod 101 is provided with a mounting platform 3, the mounting platform 3 is provided with a vertical gear 301 around the connecting rod 101, the vertical gear 301 is fixedly connected with a grab hook 4, the rotating mechanism 2 is threadedly connected with a lifting rod 5, the lifting rod 5 is provided with a rack 501 matched with the vertical gear 301, and the connecting rod 101 is provided with a positioning head 102 aligned with the drill pipe. The rotating mechanism 2 includes a driving motor 201 connected to the connector 1, the driving motor 201 is transmission-connected with a gear sleeve 1 202, the connecting rod 101 is sleeved with a support bearing 7, the support bearing 7 is connected with a gear sleeve 2 701, the gear sleeve 2 701 is aligned and adapted with the gear sleeve 1 202, the connector 1 is provided with a chamber 103, a movable plate 104 is provided in the chamber 103, and the connecting rod 101 is connected to the movable plate 104. When the movable plate 104 moves to the upper limit of the chamber 103, the gear sleeve 2 701 meshes with the gear sleeve 1 202; when the movable plate 104 moves to the lower limit of the chamber 103, the gear sleeve 2 701 disengages from the gear sleeve 1 202. A threaded ring sleeve 502 is provided at the top of the lifting rod 5, and the threaded ring sleeve 502 is threadedly connected with the gear sleeve 2 701. The threaded ring sleeve 502 is provided with an external thread, and the gear sleeve 2 701 is provided with an internal thread meshed with the external thread. The connecting rod 101 is connected to a limit rod 6 that limits the horizontal movement of the lifting rod 5, and the limit rod 6 is provided with a limit hole 601 for the lifting rod 5 to pass through. A hook 401 is provided at one end of the grab hook 4, and the other end of the hook 401 is connected to a rotating rod 403 through a bolt 402, and the rotating rod 403 is fixedly connected to the vertical gear 301. The positioning head 102 is configured as a conical head. A connecting column 105 is provided at the top of the connector 1, and a connecting thread 106 is provided on the connecting column 105. A plurality of grab hooks 4 are evenly distributed around the positioning head 102. Therefore, the device for grabbing a drill rod and automatically unhooking provided by the present invention has the beneficial effects of convenient clamping and no damage to the drill rod.

[0057] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for grabbing a drill pipe and automatically unhooking, characterized in that: The invention comprises a connecting head (1), wherein the connecting head (1) is provided with a connecting rod (101) and a rotating mechanism (2), wherein the connecting rod (101) is provided with a mounting platform (3), wherein the mounting platform (3) is provided with a vertical gear (301) around the connecting rod (101), wherein the vertical gear (301) is fixedly connected with a grab hook (4), wherein the rotating mechanism (2) is threadedly connected with a lifting rod (5), wherein the lifting rod (5) is provided with a rack (501) matched with the vertical gear (301), and wherein the connecting rod (101) is provided with a positioning head (102) aligned with a drill rod.

2. The device for grabbing drill pipe and automatically unhooking according to claim 1, characterized in that: The rotating mechanism (2) comprises a driving motor (201) connected to the connecting head (1); the driving motor (201) is drivingly connected to a gear sleeve 1 (202); the connecting rod (101) is sleeved with a supporting bearing (7); the supporting bearing (7) is connected to a gear sleeve 2 (701); the gear sleeve 2 (701) is aligned and matched with the gear sleeve 1 (202); the connecting head (1) is provided with a chamber (103); a movable plate (104) is provided in the chamber (103); and the connecting rod (101) is connected to the movable plate (104).

3. The device for grabbing drill pipe and automatically unhooking according to claim 2, characterized in that: When the movable plate (104) moves to the upper limit of the chamber (103), the second gear sleeve (701) engages with the first gear sleeve (202); when the movable plate (104) moves to the lower limit of the chamber (103), the second gear sleeve (701) disengages from the first gear sleeve (202).

4. The device for grabbing drill pipe and automatically unhooking according to claim 2, characterized in that: A threaded ring sleeve (502) is provided at the top of the lifting rod (5), and the threaded ring sleeve (502) is threadedly connected to the second gear sleeve (701).

5. The device for grabbing drill pipe and automatically unhooking according to claim 4, characterized in that: The threaded ring sleeve (502) is provided with an external thread, and the second gear sleeve (701) is provided with an internal thread meshing with the external thread.

6. The device for grabbing drill pipe and automatically unhooking according to claim 1, characterized in that: The connecting rod (101) is connected to a limiting rod (6) for limiting the horizontal movement of the lifting rod (5), and the limiting rod (6) is provided with a limiting hole (601) for the lifting rod (5) to pass through.

7. The device for grabbing drill pipe and automatically unhooking according to claim 1, characterized in that: One end of the grab hook (4) is provided with a hook claw (401), and the other end of the hook claw (401) is connected to a rotating rod (403) via a bolt (402), and the rotating rod (403) is fixedly connected to the vertical gear (301).

8. The device for grabbing drill pipe and automatically unhooking according to any one of claims 1 to 7, characterized in that: The positioning head (102) is configured as a conical head.

9. The device for grabbing drill pipe and automatically unhooking according to any one of claims 1 to 7, characterized in that: A connecting column (105) is provided at the top of the connecting head (1), and the connecting column (105) is provided with a connecting thread (106).

10. The device for grabbing drill pipe and automatically unhooking according to any one of claims 1 to 7, characterized in that: The plurality of grab hooks (4) are evenly distributed around the positioning head (102).

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