Petroleum drilling pipe clamping jaw

Abstract

The utility model relates to the technical field of petroleum drilling, in particular to a petroleum drilling pipe clamping jaw. The device comprises two protection frames connected through a connecting block, symmetrical chucks are rotationally installed in the two protection frames respectively, pipe self-adaption assemblies are arranged on the chucks, a driving assembly is arranged in one protection frame, and a synchronization assembly is arranged between the chucks in the two protection frames; according to the device, the multiple flexible clamping plates and the springs are utilized, deformation can be automatically generated when a pipe is clamped, so that the device can adapt to pipes with different diameters, the application range is wide, and the clamping effect is good; according to the device, the two chucks are used for clamping the pipe at the same time, the influence of gravity center shift of the pipe on the chucks can be reduced, and the grabbing effect and use safety are improved; the device uses the driving rod to synchronously connect the two groups of chucks, can be driven by a single motor and a speed reducer, and is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, and particularly relates to a jaw for oil drilling pipe tools. Background Art

[0002] Oil is a fluid mineral buried deep underground. During the exploitation and transportation of oil, excavation operations are required, and a large amount of water is used to cool the drill bit. After excavation, a casing needs to be lowered. A large number of pipes need to be frequently picked up and installed using equipment after being transported to the site.

[0003] However, there are still certain problems in the actual use of existing jaws. Firstly, due to the different diameters of different oil wells and the different inner diameters of pipes used by different equipment, and most of the jaws have fixed arc-shaped grooves inside. When clamping non-matching pipe tools, the contact surface becomes smaller, resulting in an increase in local pressure, which will cause damage to both the pipe tools and the jaws. At the same time, since most jaws are manually operated, when clamping pipe tools, the center position of the pipe tool cannot be accurately clamped each time, resulting in uneven forces on both sides of the jaw, and the pipe tool is prone to skew or even come out, causing danger. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a jaw for oil drilling pipe tools with reasonable design to solve the above-mentioned defects in view of the deficiencies and defects of the prior art.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: It includes two protection frames connected by a connecting block. Symmetrical chucks are respectively rotatably installed in the two protection frames. Pipe tool adaptive components are provided on the chucks. A driving component is provided in one of the protection frames, and a synchronization component is provided between the chucks in the two protection frames.

[0006] Preferably, the pipe tool adaptive component includes several flexible clamping plates arranged on the inner side of the chuck. The rear side of each flexible clamping plate is connected to the chuck through several springs. Guide sleeves are provided at positions on the chuck inside each spring, and guide posts connected to the flexible clamping plates are slidably installed in the guide sleeves.

[0007] Preferably, several of the flexible clamping plates are arc-shaped plates, and several flexible clamping plates on a single chuck are arranged in a circular arc.

[0008] Preferably, the driving component includes a reduction gearbox provided in the protection frame. The top sides of the two chucks below the reduction gearbox are respectively connected with driving gears, and the driving gears have the same rotation axis as the chucks. The two driving gears are meshed with each other. One side of the reduction gearbox is provided with a driving motor, the driving shaft of the driving motor is connected to the input end of the reduction gearbox, and the output end of the reduction gearbox is in transmission connection with one of the driving gears through a gear.

[0009] Preferably, the synchronization component includes two driving rods with the same diameter and length. Both ends of each driving rod are respectively arranged in two protection frames, and both driving rods are rotatably installed; four chucks and two driving gears are arranged on the driving rods.

[0010] Preferably, a protection tube is connected between the two protection frames. Both protection tubes are sleeved outside the driving rods, and the inner diameter of the protection tube is larger than the diameter of the driving rod, and there is no contact between the driving rod and the protection tube.

[0011] After adopting the above structure, the beneficial effects of the present utility model are as follows:

[0012] 1. The device uses multiple flexible clamping plates and springs, which can automatically deform when clamping the pipe, so as to adapt to pipes with different diameters, with a wide range of use and good clamping effect.

[0013] 2. The device uses two groups of chucks to clamp the pipe at the same time, which can reduce the influence of the pipe's center of gravity deviation on the chucks, and improve the grasping effect and use safety.

[0014] 3. The device uses a driving rod to synchronously connect two groups of chucks, which can be driven by a single motor and a speed reducer, with a simple structure and low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structure diagram of the present utility model;

[0016] Figure 2 is the connection schematic diagram of the main driving structure in the present utility model;

[0017] Figure 3 is the structural sectional view of the protection frame provided with a driving component in the present utility model;

[0018] Figure 4 is the connection structure schematic diagram of the flexible clamping plate in the present utility model.

[0019] Description of the reference numerals:

[0020] 1. Protection frame; 2. Connection block; 3. Chuck; 4. Driving motor; 5. Reduction box; 6. Driving gear; 7. Driving rod; 8. Protection tube; 9. Guide sleeve; 10. Guide post; 11. Spring; 12. Flexible clamping plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Referring to Figure 1 - Figure 2 As shown, it includes two protective frames 1 connected by a connecting block 2. Symmetric chucks 3 are rotatably installed in the two protective frames 1 respectively. Tube adaptor components are provided on the chucks 3, a driving component is provided in one of the protective frames 1, and a synchronization component is provided between the chucks 3 in the two protective frames 1.

[0023] Referring to Figure 1 - Figure 4 As shown, the tube adaptor component includes several flexible clamping plates 12 provided on the inner side of the chuck 3. The rear side of each flexible clamping plate 12 is connected to the chuck 3 through several springs 11. Guide sleeves 9 are provided at the positions on the chuck 3 inside each spring 11. Guide posts 10 connected to the flexible clamping plates 12 are slidably installed in the guide sleeves 9; the several flexible clamping plates 12 are all arc-shaped plates, and the several flexible clamping plates 12 on a single chuck 3 are arranged in a circular arc.

[0024] As an optimized solution of the present utility model, when the chuck 3 clamps, the spring 11 can be gradually compressed under pressure, thereby reversely pushing the flexible clamping plate 12 to clamp the tube. When the size of the tube changes, the compression degree of the spring 11 will also change accordingly, so as to ensure the stability of clamping; the guide post 10 and the guide sleeve 9 can ensure that the flexible clamping plate 12 will not be skewed, thereby preventing the tube from shaking during the clamping process, and the flexible clamping plate 12 can reduce the pressure on the surface of the tube and prevent damage.

[0025] Referring to Figure 1 - Figure 4 As shown, the driving component includes a reduction gearbox 5 provided in the protective frame 1. The top sides of the two chucks 3 below the reduction gearbox 5 are respectively connected with driving gears 6, and the driving gears 6 have the same rotation axis as the chucks 3. The two driving gears 6 are meshed with each other. A driving motor 4 is provided on one side of the reduction gearbox 5. The driving shaft of the driving motor 4 is connected to the input end of the reduction gearbox 5. The output end of the reduction gearbox 5 is in transmission connection with one of the driving gears 6 through a gear;

[0026] The synchronization component includes two driving rods 7 with the same diameter and length. The two ends of each driving rod 7 are respectively arranged in the two protective frames 1, and the two driving rods 7 are rotatably installed; the four chucks 3 and the two driving gears 6 are all arranged on the driving rods 7.

[0027] As an optimized solution of the present utility model, the reducer 5 is used to reduce the rotation output by the driving motor 4 to increase the torque, and then drive a driving gear 6. The other driving gear 6 is driven and rotates in the opposite direction, so that the two chucks 3 connected below rotate in opposite directions to each other. At the same time, the two driving rods 7 will drive the other two chucks 3 to rotate, so that the four chucks 3 can rotate synchronously.

[0028] Refer to Figure 1 - Figure 4 As shown, a protective tube 8 is connected between the two protective frames 1. Both of the two protective tubes 8 are sleeved outside the driving rod 7, and the inner diameter of the protective tube 8 is larger than the diameter of the driving rod 7, and there is no contact between the driving rod 7 and the protective tube 8.

[0029] As an optimized solution of the present utility model, the protective tube 8 is used to protect the driving rod 7 to prevent direct rain and reduce the influence of dust and sediment on the driving rod 7.

[0030] The principle and usage process of the present utility model are as follows:

[0031] Install this jaw on the gripping device. Then, when gripping is required, first start the driving motor 4 to rotate. Drive the four chucks 3 below to open outward synchronously through the reducer 5, the driving gear 6 and the driving rod 7. Then move this jaw above the pipe fitting and lower it. Then start the driving motor 4 to reverse, drive the four chucks 3 to rotate inward synchronously. When the flexible clamping plate 12 contacts the pipe fitting, the spring 11 begins to be gradually compressed, and due to different forces, the compression degrees of different springs 11 are different, so that it can automatically adapt to pipes with different diameters.

[0032] It should be understood that the above specific embodiments of the present utility model are only used for exemplary illustration or explanation of the principle of the present utility model, and do not constitute a limitation to the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present utility model shall be included within the protection scope of the present utility model. In addition, the appended claims of the present utility model are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A petroleum drilling pipe clamp, comprising two protection frames (1) connected by a connecting block (2), characterized in that: Symmetrical clamps (3) are rotatably mounted in the two protection frames (1), and the clamps (3) are each provided with a pipe adaptive component. A driving component is provided in one of the protection frames (1), and a synchronization component is provided between the clamps (3) in the two protection frames (1); the pipe adaptive component comprises a plurality of flexible clamps (12) arranged inside the clamps (3), the rear side of each flexible clamp (12) is connected to the clamp (3) via a plurality of springs (11), a guide sleeve (9) is provided at a position inside each spring (11) on the clamp (3), and a guide column (10) connected to the flexible clamp (12) is slidably mounted in the guide sleeve (9).

2. The oil drilling pipe clamp according to claim 1, characterized in that: The plurality of flexible splints (12) are all arc-shaped plates, and the plurality of flexible splints (12) on a single clamping head (3) are arranged and installed in an arc shape.

3. The oil drilling pipe clamp according to claim 2, characterized in that: The driving assembly comprises a reduction box (5) arranged in the protection frame (1), the top side surfaces of the two chucks (3) below the reduction box (5) are connected with driving gears (6), and the driving gears (6) and the chucks (3) have the same rotation axis, and the two driving gears (6) are meshed with each other. A driving motor (4) is arranged on one side of the reduction box (5), and the driving shaft of the driving motor (4) is connected to the input end of the reduction box (5), and the output end of the reduction box (5) is connected to one of the driving gears (6) through a gear.

4. The oil drilling pipe clamp according to claim 3, characterized in that: The synchronization component comprises two driving rods (7) of the same diameter and length, the two ends of each driving rod (7) are respectively arranged in two protection frames (1), and the two driving rods (7) are both rotatably mounted; four clamps (3) and two driving gears (6) are all arranged on the driving rods (7).

5. The oil drilling pipe clamp according to claim 4, characterized in that: A protection tube (8) is connected between the two protection frames (1), and the two protection tubes (8) are both sleeved outside the driving rod (7). The inner diameter of the protection tube (8) is larger than the diameter of the driving rod (7), and there is no contact between the driving rod (7) and the protection tube (8).

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