Anti-falling positioning device for fishing drill bit

Abstract

The utility model belongs to the field of rotary drilling rig equipment, and discloses an anti-falling positioning device for a fishing drill bit, which comprises a connector, and a connecting column is mounted at the bottom of the connector; the mounting plate is mounted at the bottom of the connecting column; the fishing hook is mounted on the mounting plate in a sliding manner; and the driving mechanism is mounted on the connecting column and used for driving the fishing hook to move relative to the mounting plate. The fishing hooks are driven by the driving mechanism to move relative to the mounting plate, so that the distance between the fishing hooks can be adjusted according to the drill bits, the device can be adapted to fishing of various drill bits, and the applicability of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of rotary drilling equipment, specifically relating to a drill bit anti-detachment positioning device. Background Technology

[0002] During rotary drilling rig construction, if a drill bit falls off and into the hole, it needs to be retrieved using a drill bit retrieval device. However, during the retrieval process, the drill bit can easily get stuck on the hole wall, usually requiring the drill bit to be rotated. Rotating the drill bit can easily cause it to fall off again. To eliminate or reduce this instability, a retrieval device is usually needed that can hold the fallen drill bit in place.

[0003] In related documents, Chinese Patent Publication No. CN218467581U discloses a device for retrieving rotary drilling bits, including a rotary drilling sleeve, a connecting plate, a positioning plate, and a retrieval hook. The rotary drilling sleeve is connected to the positioning plate via the connecting plate, and the positioning plate is equipped with a retrieval hook. The positioning plate includes a base plate and two side plates vertically mounted on the base plate, with through holes on the side plates. The bottom of the retrieval hook is conical and equipped with barbs. The beneficial effect of this utility model is that this device can retrieve drill bits very conveniently, reducing safety risks.

[0004] However, in actual use, the size of the retrieval hook is fixed and the horizontal distance between the retrieval hook and the drill rod cannot be adjusted. Furthermore, the sizes of the connectors for different drill bits vary, which results in a narrow range of applicability for the above-mentioned solution and makes it unsuitable for practical use. Utility Model Content

[0005] The present invention aims to provide a drill bit anti-detachment positioning device to solve the problem of the narrow applicability of the prior art mentioned above.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drill bit retrieval anti-detachment positioning device, comprising...

[0007] The connector has a connecting post installed at the bottom;

[0008] Mounting plate, installed at the bottom of the connecting column;

[0009] The retrieval hook is slidably mounted on the mounting plate.

[0010] The drive mechanism is mounted on the connecting column and is used to drive the retrieval hook to move relative to the mounting plate.

[0011] The principle and effects of this technical solution:

[0012] 1. The drive mechanism moves the retrieval hooks relative to the mounting plate, allowing the distance between the retrieval hooks to be adjusted according to the drill bit. This enables the device to be adapted to retrieval using various drill bits, thus improving its applicability.

[0013] 2. The drill pipe is connected via a connector, allowing the retrieval device to be mounted on the drill pipe and carried into the borehole without the need for other retrieval devices. By making the connector detachable from the connecting post, the size of the connector can be changed according to the size of the drill pipe.

[0014] The present invention is further configured such that: an elastic snap-fit ​​assembly is installed on the side wall of the bottom of the fishing hook, the elastic snap-fit ​​assembly includes a spring, a pressure plate and a wedge, the inner side of the fishing hook has a receiving cavity, the pressure plate is slidably fitted in the receiving cavity, the wedge is slidably inserted into the fishing hook and fixed to the pressure plate, the spring is installed in the receiving cavity and is located on the side of the pressure plate away from the wedge, the wedge has a wedge surface and the wedge surface is located on the side of the wedge away from the pressure plate.

[0015] The principle and effect of this technical solution: By setting up a wedge, spring, pressure plate and wedge surface, the connection between the fishing hook and the drill bit can be strengthened by the wedge engaging in the drill bit pin hole when the fishing hook is fishing. When the fishing hook falls, the wedge surface of the wedge will automatically slide along the axis to make room after it abuts against the connection with the drill bit (the pressure plate compresses the spring), which makes the fishing more stable. Compared with the method of the arc-shaped hook claw engaging in the pin hole, the wedge is easier to engage in the pin hole, making fishing more convenient and faster.

[0016] The present invention is further configured such that the cross-section of the fishing hook is an inverted "T" shape, and two sets of elastic snap-fit ​​components are symmetrically arranged at the bottom of the fishing hook.

[0017] The principle and effect of this technical solution: By setting the inverted T-shape, the retrieval hook can be locked and limited by the step of the T-shaped head facing the internal or external step (reinforcing rib) of the drill bit connection, thereby improving the stability during retrieval. In addition, the T-shape setting allows the retrieval hook to fit better into the drill bit connection, and the elastic locking components on both sides are respectively locked into the internal or external part of the drill bit connection, making it more flexible to use.

[0018] The present invention is further configured such that: a groove is provided on the mounting plate, a guide rod is fixed in the groove, the retrieval hook is slidably fitted on the guide rod, and the retrieval hook is slidably engaged with the groove.

[0019] The principle and effect of this technical solution: By setting up the slide groove and guide rod, the sliding of the retrieval hook is stable and reliable, and the guide rod can distribute the gravity on the drill bit when retrieval, thereby distributing the gravity on the drive mechanism and reducing the pressure on the drive mechanism.

[0020] The present invention is further configured such that: the driving mechanism includes a driving block, a transmission rod and a driving assembly; the connecting column has a driving cavity inside; the side wall of the connecting column has a driving groove communicating with the driving cavity; the driving block is slidably fitted in the driving cavity; the driving block has a protrusion; the protrusion is slidably fitted with the driving groove; one end of the transmission rod is hinged to the protrusion; the other end of the transmission rod is hinged to the fishing hook; and the driving assembly is used to drive the driving block to slide up and down along the driving cavity.

[0021] The principle and effect of this technical solution: By setting up the drive block and transmission rod, a crank-slider structure is formed between the fishing hook, transmission rod and drive block. The horizontal movement of the fishing hook can be indirectly controlled by the sliding of the drive block, so that the position of the fishing hook can be adjusted according to the size of the drill bit connection. Furthermore, the movement of the drive block is controlled by the drive component, so that the movement of the fishing hook is stable and controllable.

[0022] The present invention is further configured such that: the drive assembly includes a screw and a motor, the screw is rotatably installed in the drive cavity, and the drive block is threadedly fitted onto the screw, the motor is installed inside the connecting column and the mounting plate, and the movable end of the motor is connected to the screw.

[0023] The principle and effect of this technical solution: The motor drives the screw to rotate, and the drive block cannot rotate due to the cooperation between the protrusion and the drive groove. Thus, the screw can drive the drive block to move up and down. When the motor stops working, due to the self-locking property of the thread (the direction of force and the direction of rotation are not in the same plane), the drive block can maintain a stable position, thereby ensuring the stability of the position of the transmission rod and the fishing hook.

[0024] The present invention is further configured such that a distance sensor is installed at the bottom of the mounting plate.

[0025] The principle and effect of this technical solution: By setting up a distance sensor, the operator can monitor the distance between the retrieval device and the drill bit from the ground, thereby avoiding the situation where the retrieval device collides with the drill bit due to excessively fast descent speed, and improving the work efficiency during retrieval. Attached Figure Description

[0026] Figure 1 This is the front view of the present invention;

[0027] Figure 2 for Figure 1 Enlarged cross-sectional view of the retrieval hook in the middle;

[0028] Figure 3 for Figure 2 Axonometric structural diagram;

[0029] Figure 4 for Figure 1 Axonometric structural diagram of the central drive block. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0031] The reference numerals in the accompanying drawings include:

[0032] 110. Connector;

[0033] 210. Connecting post; 211. Drive cavity; 212. Drive slot;

[0034] 310. Mounting plate; 311. Slide groove; 320. Guide rod;

[0035] 410. Retrieval hook; 411. Receiving cavity; 420. Wedge post; 421. Wedge surface; 430. Pressure plate; 440. Spring;

[0036] 510. Drive block; 511. Protrusion; 520. Transmission rod; 530. Screw; 540. Motor;

[0037] 610. Distance sensor;

[0038] 710. Corrugated sheath.

[0039] Example:

[0040] As attached Figure 1-4 As shown, this utility model discloses a drill bit anti-detachment positioning device, including a connector 110, a mounting plate 310, a retrieval hook 410, and a drive mechanism. A connecting post 210 (which can be connected by bolts, screws, etc.) is detachably mounted on the bottom of the connector 110. The connector 110 is connected to the drill rod via a pin. The mounting plate 310 is mounted on the bottom of the connecting post 210. A sliding groove 311 is provided on the mounting plate 310, and a guide rod 320 is fixed within the sliding groove 311. The retrieval hook 410 is slidably fitted onto the guide rod 320, and the retrieval hook 410 slides in cooperation with the sliding groove 311. (Specifically, there can be two or four retrieval hooks 410, evenly distributed around the mounting plate 310). A distance sensor 610 is mounted on the bottom of the mounting plate 310, located in the center of the bottom surface of the mounting plate 310. The distance sensor 610 can be an infrared rangefinder, a commercially available product, and will not be described in detail.

[0041] The cross-section of the retrieval hook 410 is an inverted "T" shape, and two sets of elastic locking components are symmetrically arranged at the bottom of the retrieval hook 410. The elastic locking components include a spring 440, a pressure plate 430, and a wedge 420. The inner side of the retrieval hook 410 has a receiving cavity 411. The pressure plate 430 is slidably fitted in the receiving cavity 411. The wedge 420 is slidably inserted into the retrieval hook 410 and is fixed to the pressure plate 430. The spring 440 is installed in the receiving cavity 411 and is located on the side of the pressure plate 430 away from the wedge 420. The wedge 420 has a wedge surface 421, which is located on the side of the wedge 420 away from the pressure plate 430.

[0042] The drive mechanism includes a drive block 510, a transmission rod 520, and a drive assembly. The connecting column 210 has a drive cavity 211 inside. The side wall of the connecting column 210 has a drive groove 212 that communicates with the drive cavity 211. The drive block 510 is slidably fitted in the drive cavity 211 and has a protrusion 511 that is slidably fitted with the drive groove 212. One end of the transmission rod 520 is hinged to the protrusion 511, and the other end of the transmission rod 520 is hinged to the fishing hook 410. The drive assembly includes a screw 530 and a motor 540. The screw 530 is rotatably installed in the drive cavity 211, and the drive block 510 is threaded onto the screw 530. The motor 540 is installed inside the connecting column 210 and the mounting plate 310, and the movable end of the motor 540 is connected to the screw 530.

[0043] A mobile power supply is provided on the upper part of the mounting plate 310 or on the inner side of the mounting plate 310 to power the distance sensor 610 and the motor 540. A wireless signal module is installed on the outer side of the upper end of the connecting column 210 to receive and send signals for the ground staff to distinguish and identify (the mobile power supply and the wireless signal module are existing technologies and will not be described in detail).

[0044] To prevent mud and sand in the hole from affecting the movement of the drive mechanism, corrugated sleeves 710 are fitted on both the screw 530 and the guide rod 320. The corrugated sleeves 710 protect the screw 530 and the guide rod 320 to prevent mud and sand from entering the mating area between the drive block 510 and the screw 530, and to prevent mud and sand from entering the mating area between the fishing hook 410 and the guide rod 320. The corrugated sleeves 710 are commonly used dustproof kits for shaft components on the market and are commercial products, so they will not be described in detail here.

[0045] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A drill bit retrieval anti-detachment positioning device, characterized in that: include The connector has a connecting post installed at the bottom; Mounting plate, installed at the bottom of the connecting column; A retrieval hook is slidably mounted on the mounting plate; A drive mechanism is mounted on the connecting column and is used to drive the retrieval hook to move relative to the mounting plate.

2. The drill bit anti-detachment positioning device as described in claim 1, characterized in that: The bottom sidewall of the retrieval hook is equipped with an elastic locking assembly, which includes a spring, a pressure plate, and a wedge. The inner side of the retrieval hook has a receiving cavity. The pressure plate is slidably fitted into the receiving cavity. The wedge is slidably inserted into the retrieval hook and fixed to the pressure plate. The spring is installed in the receiving cavity and is located on the side of the pressure plate away from the wedge. The wedge has a wedge surface located on the side of the wedge away from the pressure plate.

3. The drill bit anti-detachment positioning device as described in claim 2, characterized in that: The cross-section of the retrieval hook is an inverted "T" shape, and two sets of elastic locking components are symmetrically arranged at the bottom of the retrieval hook.

4. The drill bit anti-detachment positioning device as described in claim 1, characterized in that: The mounting plate has a sliding groove, and a guide rod is fixed in the sliding groove. The retrieval hook is slidably fitted on the guide rod, and the retrieval hook is slidably engaged with the sliding groove.

5. The drill bit anti-detachment positioning device as described in claim 1, characterized in that: The driving mechanism includes a driving block, a transmission rod, and a driving assembly. The connecting column has a driving cavity inside, and a driving groove communicating with the driving cavity is opened on the side wall of the connecting column. The driving block is slidably fitted in the driving cavity, and the driving block has a protrusion that is slidably fitted with the driving groove. One end of the transmission rod is hinged to the protrusion, and the other end of the transmission rod is hinged to the retrieval hook. The driving assembly is used to drive the driving block to slide up and down along the driving cavity.

6. The drill bit anti-detachment positioning device as described in claim 5, characterized in that: The drive assembly includes a screw and a motor. The screw is rotatably mounted in the drive cavity, and the drive block is threaded onto the screw. The motor is mounted inside the connecting post and the mounting plate, and the movable end of the motor is connected to the screw.

7. The drill bit anti-detachment positioning device as described in claim 1, characterized in that: A distance sensor is installed at the bottom of the mounting plate.

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