Automatic locking device for wellhead elevator in oil drilling

Abstract

The utility model discloses an automatic locking device of well mouth elevator for petroleum drilling belongs to petroleum drilling tool technical field. Including: mounting panel, its corner part is equipped with the fixed slot for fixed, fixed frame is fixedly connected in the top of mounting panel and extends upward, moving plate is connected with fixed frame through first drive mechanism, and first drive mechanism is used for driving moving plate relative to fixed frame and moves up and down, limit stop plate is connected with moving plate through second drive mechanism, and second drive mechanism is used for driving limit stop plate relative to moving plate and moves back and forth, clamping subassembly sets up in the front end of limit stop plate and is used for executing clamping action. The automatic locking device of well mouth elevator for petroleum drilling has the function of automatic locking and adjusting position, can reduce the labor intensity, improves the operation efficiency, and the safety is good.

Description

Technical Field

[0001] This utility model relates to a wellhead clamp for oil drilling, and more particularly to an automatic locking device for a wellhead clamp for oil drilling, belonging to the field of oil drilling tool technology. Background Technology

[0002] Wellhead chucks are critical well control tools used in oil drilling to suspend and hold drill pipe or casing at the wellhead. Through their internal slip mechanism, they can quickly and reliably clamp the tubing string and withstand enormous loads. They are the core safety equipment connecting the drill string to the wellhead and preventing the tubing string from falling to the bottom of the well. Their performance directly affects the efficiency and safety of drilling operations and is an indispensable component ensuring the smooth progress of drilling.

[0003] Traditional hoists mostly use a manual locking method, which means that the operator manually opens and closes the hoist valve and inserts a safety pin to lock it. In the high-pressure and high-intensity drilling operation environment, manual operation is not only inefficient, but also greatly increases the labor intensity of the operator and the time exposed to the dangerous area at the wellhead, resulting in a high risk to personal safety. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the above and / or prior art, this utility model is proposed.

[0006] The purpose of this invention is to overcome the problems of low efficiency and poor safety of traditional lifting clamps that use manual locking in the existing technology, and to provide an automatic locking device for wellhead lifting clamps used in oil drilling. This device has the functions of automatic locking and position adjustment, which can reduce labor intensity, improve work efficiency, and ensure good safety.

[0007] To solve the above technical problems, this utility model provides an automatic locking device for wellhead clamps used in oil drilling, comprising: The mounting plate has fixing grooves at its corners for securing it; A fixed frame is fixedly connected to the top of the mounting plate and extends upward; A movable plate is connected to the fixed frame via a first driving mechanism, which is used to drive the movable plate to move up and down relative to the fixed frame. A limiting plate is connected to the movable plate via a second driving mechanism, which is used to drive the limiting plate to move back and forth relative to the movable plate. A clamping assembly is disposed at the front end of the limiting plate and is used to perform clamping actions.

[0008] Furthermore, the first driving mechanism includes a first motor, a first screw, and a first guide rod. Two vertical first grooves are symmetrically arranged on the front surface of the fixed frame. The first screw is installed in one of the first grooves, and the first guide rod is installed in the other. The axes of the first guide rod and the first screw are parallel to each other. The first motor is fixed to the top of the fixed frame, and its output end is driven by the upper end of the first screw. Two movable plate tenons are symmetrically arranged at the rear end of the movable plate. The two movable plate tenons are respectively embedded in the two first grooves. One movable plate tenon has a screw hole for threaded connection with the first screw, and the other movable plate tenon has a through hole for sliding engagement with the first guide rod.

[0009] Furthermore, the second driving mechanism includes a second motor, a second screw, and a second guide rod. Two second grooves extending in the front-rear direction are symmetrically arranged on the top surface of the moving plate. The second screw is installed in one of the second grooves, and the second guide rod is installed in the other. The axes of the second guide rod and the second screw are parallel to each other. The second motor is fixed to one side of the moving plate, and its output end is connected to the second screw. The rear end of the limiting plate has two downward-protruding limiting plate lugs, which are respectively embedded in the two second grooves. One limiting plate lug has a screw hole for threaded connection with the second screw, and the other limiting plate lug has a through hole for sliding engagement with the second guide rod.

[0010] Furthermore, the output end of the second motor is connected to one end of the second screw via a gear transmission assembly; the gear transmission assembly includes: The first gear is fixedly sleeved on one end of the second screw; The second gear is fixedly sleeved on the output end of the second motor and meshes with the first gear.

[0011] Furthermore, both the first gear and the second gear are bevel gears. Furthermore, the clamping assembly includes: A clamping frame is fixedly connected to the front end of the limiting plate, and its front end is provided with a U-shaped opening; Two hydraulic rods are symmetrically fixed to the opposing inner walls of the U-shaped opening and extend towards each other; Two clamps are respectively fixedly connected to the output ends of the two hydraulic rods; The two clamps each have a semi-circular recessed jaw on their opposing end faces.

[0012] Furthermore, the movable plate is cantilevered to the front side of the fixed frame via the first drive mechanism.

[0013] Compared with the prior art, the advantages or beneficial effects of this utility model include at least the following: 1. This utility model uses a first motor to drive a first screw, which controls the moving plate to move longitudinally to achieve initial alignment. Then, it drives the second screw to rotate, thereby controlling the limiting plate and the clamping frame at its end to move laterally. Finally, the hydraulic rod in the clamping frame drives the clamps on both sides to perform the final clamping action.

[0014] 2. The entire locking process of this utility model, including longitudinal positioning, lateral fine adjustment, and final clamping action, is driven by a motor and hydraulic rod. It eliminates the need for operators to manually operate the machine near the dangerous area at the center of the wellhead. This not only frees workers from heavy, repetitive, and high-risk labor and reduces accidents caused by fatigue or misoperation, but also makes movement and positioning faster and more precise due to the motor-driven threaded rod. This significantly shortens the time for locking and unlocking the clamp, thereby accelerating the pace of wellhead operations such as connecting single sections and tripping drill bits, and greatly improving the overall drilling efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The drawings are provided for reference and illustration only and are not intended to limit this utility model. Wherein: Figure 1 This utility model relates to a three-dimensional automatic locking device for wellhead clamps used in oil drilling. Figure 1 ; Figure 2 This utility model relates to a three-dimensional automatic locking device for wellhead clamps used in oil drilling. Figure 2 ; Figure 3 This is a perspective view of the present invention with the limiting plate and clamp removed. Figure 4 This is a top view of the movable plate in this utility model; Reference numerals in the attached drawings: 1. Mounting plate; 2. Fixing frame; 3. First groove; 4. First motor; 5. First screw; 6. Moving plate; 7. Second groove; 8. Second screw; 9. Limiting plate; 10. Clamping frame; 11. Hydraulic rod; 12. Clamp; 13. Fixing groove; 14. First gear; 15. Second motor; 16. Second gear; 17. First guide rod; 18. Second guide rod. Detailed Implementation

[0016] In the description of this utility model, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0019] like Figures 1 to 4 As shown, the automatic locking device for wellhead clamps in oil drilling of this utility model includes a mounting plate 1, a fixing frame 2, a moving plate 6, a limiting plate 9, and a clamp 12. The four corners of the mounting plate 1 are respectively provided with fixing grooves 13, through which the mounting plate 1 can be fixed. The top of the mounting plate 1 is fixedly connected to an upwardly extending fixing frame 2. Two vertically extending first grooves 3 are symmetrically arranged on the front surface of the fixing frame 2. One first groove 3 contains a first screw 5 coaxial with it, and the other first groove 3 contains a first guide rod 17 coaxial with it. The upper end of the first screw 5 is driven by a first motor 4, which is fixed to the top of the fixing frame 2.

[0020] The movable plate 6 extends along the horizontal plane and is perpendicular to the fixed frame 2. The rear end of the movable plate 6 is symmetrically provided with two movable plate protrusions. The two movable plate protrusions are correspondingly embedded in the two first grooves 3 of the fixed frame 2. One of the movable plate protrusions is provided with a screw hole and connected to the first screw 5. The other movable plate protrusion is provided with a light hole and is clearance-fitted with the first guide rod 17, so that the movable plate 6 is cantilevered and connected to the front side of the fixed frame 2.

[0021] When the first motor 4 drives the first screw 5 to rotate, it drives the moving plate 6 to float up and down to adjust its height. During the up and down floating process, the first guide rod 17 plays a guiding role by cooperating with the smooth hole on the tenon of the moving plate.

[0022] The top surface of the movable plate 6 is symmetrically provided with two second grooves 7. The two second grooves 7 are parallel to each other and parallel to the axis of the length direction of the movable plate 6. One of the second grooves 7 is provided with a second screw 8 coaxial with it, and the other second groove 7 is provided with a second guide rod 18 coaxial with it.

[0023] One end of the second screw 8 is fixedly connected to the first gear 14, and one side of the moving plate 6 is fixedly connected to the second motor 15. The output end of the second motor 15 is fixedly connected to the second gear 16, and the first gear 14 and the second gear 16 mesh with each other. Preferably, both the first gear 14 and the second gear 16 are bevel gears.

[0024] A limiting plate 9 is provided above the movable plate 6. The rear end of the limiting plate 9 is provided with a downward protruding limiting plate lug. The two limiting plate lugs are correspondingly embedded in the second groove 7 of the movable plate 6. One of the limiting plate lugs is provided with a screw hole and connected to the second screw 8. The other limiting plate lug is provided with a light hole and is clearance-fitted with the second guide rod 18.

[0025] Starting the first motor 4 drives the first screw 5 to rotate, which in turn moves the moving plate 6 up and down. Starting the second motor 15 drives the second gear 16 to rotate, which in turn drives the first gear 14 to rotate, thus rotating the second screw 8. The second screw 8 then moves the limiting plate 9 back and forth, guided by the second guide rod 18. This allows the device to precisely adjust and lock its position from two directions, effectively adapting to different specifications of tubing or tools. It eliminates potential deviations or oversights that may occur with manual locking, ensuring uniform and stable locking force, greatly reducing the risk of tubing slippage, and significantly improving safety performance.

[0026] A clamping frame 10 is fixedly connected to the front end of the limiting plate 9. The front end of the clamping frame 10 has a U-shaped opening. Hydraulic rods 11 extending in opposite directions are symmetrically fixedly connected to the inner walls of the U-shaped opening. Clamps 12 are fixedly connected to the output ends of the two hydraulic rods 11 respectively. The opposing end faces of the two clamps 12 are respectively provided with semi-circular recessed jaws. The hydraulic rods 11 can drive the clamps 12 to move closer or separate, locking or releasing the pipe column or other components at the lifting port.

[0027] The working principle and usage process of this utility model are as follows: When in use, starting the first motor 4 drives the first screw 5 to rotate, which in turn moves the moving plate 6 up and down. Starting the second motor 15 drives the second gear 16 to rotate. The first gear 14 and the second gear 16 mesh with each other, which drives the first gear 14 to rotate, thereby driving the second screw 8 to rotate, which in turn drives the limiting plate 9 to move back and forth. The hydraulic rod 11 can drive the clamp 12 to move towards or away from each other, which can lock and clamp the lifting port. This allows the device to be precisely adjusted and locked in position from two directions, effectively adapting to different specifications of pipes or tools. It eliminates the deviations or omissions that may occur with manual locking, ensures uniform and stable locking force, greatly reduces the risk of pipe slippage, and significantly improves safety performance.

[0028] The above description is merely a preferred embodiment of the present utility model, showing and describing the basic principles, main features, and advantages of the present utility model. It is not intended to limit the scope of patent protection of the present utility model. Those skilled in the art should understand that the present utility model is not limited to the above embodiments. In addition to the above embodiments, the present utility model may have other implementations without departing from the spirit and scope of the present utility model. Various changes and improvements to the present utility model are also possible. All technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by the present utility model. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents. Technical features not described in the present utility model can be implemented by or using existing technology, and will not be elaborated here.

Claims

1. An automatic locking device for wellhead clamps used in oil drilling, characterized in that, include: Mounting plate (1), with a fixing groove (13) at its corner for fixing; The fixed frame (2) is fixedly connected to the top of the mounting plate (1) and extends upward; The movable plate (6) is connected to the fixed frame (2) through a first driving mechanism. The first driving mechanism is used to drive the movable plate (6) to move up and down relative to the fixed frame (2). The limiting plate (9) is connected to the moving plate (6) through a second driving mechanism. The second driving mechanism is used to drive the limiting plate (9) to move back and forth relative to the moving plate (6). A clamping assembly is disposed at the front end of the limiting plate (9) and is used to perform clamping actions; The first driving mechanism includes a first motor (4), a first screw (5) and a first guide rod (17). Two vertical first grooves (3) are symmetrically provided on the front surface of the fixed frame (2). The first screw (5) is installed in one of the first grooves (3), and the first guide rod (17) is installed in the other first groove (3). The axes of the first guide rod (17) and the first screw (5) are parallel to each other. The first motor (4) is fixed to the top of the fixed frame (2), and its output end is driven to the upper end of the first screw (5). The rear end of the movable plate (6) is symmetrically provided with two movable plate protrusions. The two movable plate protrusions are respectively embedded in the two first grooves (3). One of the movable plate protrusions is provided with a screw hole and is threadedly connected to the first screw (5). The other movable plate protrusion is provided with a light hole and is slidably engaged with the first guide rod (17). The second drive mechanism includes a second motor (15), a second screw (8), and a second guide rod (18). The top surface of the moving plate (6) is symmetrically provided with two second grooves (7) extending in the front-back direction. The second screw (8) is installed in one of the second grooves (7), and the second guide rod (18) is installed in the other second groove (7). The axes of the second guide rod (18) and the second screw (8) are parallel to each other. The second motor (15) is fixed to one side of the moving plate (6), and its output end is driven by the second screw (8). The rear end of the limiting plate (9) is provided with two downward protruding limiting plate ears. The two limiting plate ears are respectively embedded in the two second grooves (7). One of the limiting plate ears is provided with a screw hole and is threadedly connected to the second screw (8). The other limiting plate ear is provided with a light hole and is slidably engaged with the second guide rod (18). The clamping assembly includes: The clamping frame (10) is fixedly connected to the front end of the limiting plate (9), and its front end is provided with a U-shaped opening; Two hydraulic rods (11) are symmetrically fixed to the opposing inner walls of the U-shaped opening and extend towards each other; Two clamps (12) are fixedly connected to the output ends of the two hydraulic rods (11), respectively; The two clamps (12) have semi-circular recessed jaws on their opposite end faces.

2. The automatic locking device for wellhead clamps used in oil drilling according to claim 1, characterized in that, The output end of the second motor (15) is connected to one end of the second screw (8) via a gear transmission assembly; the gear transmission assembly includes: The first gear (14) is fixedly sleeved on one end of the second screw (8); The second gear (16) is fixedly sleeved on the output end of the second motor (15) and meshes with the first gear (14).

3. The automatic locking device for wellhead clamps used in oil drilling according to claim 2, characterized in that: Both the first gear (14) and the second gear (16) are bevel gears.

4. The automatic locking device for wellhead clamps used in oil drilling according to claim 1, characterized in that, The movable plate (6) is cantilevered to the front side of the fixed frame (2) via the first drive mechanism.

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