Hydraulic slip capable of preventing clamping damage of drilling tool

Abstract

The utility model relates to the technical field of hydraulic slips, in particular to a hydraulic slip capable of preventing clamping damage of a drilling tool, which comprises a ring block, an oil cylinder is arranged on the inner side of the ring block, and a clamp component is slidably arranged on the inner side of the oil cylinder. The clamp assembly comprises a sliding block, the sliding block is installed on the inner side of the oil cylinder in a sliding mode, an arc groove is formed in the sliding block, an arc plate is installed on the inner side of the arc groove in a sliding mode, the arc plate comprises an inner arc face and an outer arc face, a high-strength spring is fixedly installed on the outer arc face, and a pressure sensor is fixedly connected to the inner side end of the high-strength spring. The inner side face of the pressure sensor is fixedly connected with the inner wall of the arc groove. By means of the clamp assembly, the drilling machine can be better controlled when applying hydraulic loading, the drilling tool on the inner side of the inner arc face can be gradually clamped, the situation that the side wall of the drilling tool is sunken due to the fact that clamping force is too large during rigid clamping is avoided, the protection effect on the drilling tool is improved, and the drilling tool is prevented from being damaged in the clamping process.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic slips, in particular to a hydraulic slip capable of preventing drilling tools from being clamped and damaged. Background Art

[0002] Slips are tools used to hold and suspend the drill string and casing string during the drilling process.

[0003] Existing hydraulic slips are mainly used to clamp the drilling tools at the hole and have a gravity locking function. The main advantage is that they can clamp the drilling tools at any position. However, due to the heavy weight of the drilling tools in ultra-deep well drilling, and the gravity self-locking structure of the hydraulic slips, the clamping force of the slips is increased under the action of gravity, which often causes damage to the outer surface of the drilling tools. Frequent lifting and lowering of the drilling tools will accelerate the damage of the drilling tools, causing a sharp reduction in the service life of the drilling tools, and even the occurrence of drilling accidents.

[0004] Therefore, we propose a hydraulic slip that can prevent the drill bit from being damaged by clamping to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings of the prior art and proposes a hydraulic slip for preventing the drilling tool from being damaged by clamping.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A hydraulic slip for preventing drilling tools from being damaged by clamping, comprising a circular ring block, an oil cylinder is provided on the inner side of the circular ring block, a clamp assembly is slidably provided on the inner side of the oil cylinder; the clamp assembly comprises a slider, the slider is slidably mounted on the inner side of the oil cylinder, an arc groove is provided inside the slider, an arc plate is slidably mounted on the inner side of the arc groove, the arc plate comprises an inner arc surface and an outer arc surface, a high-strength spring is fixedly mounted on the outer arc surface, a pressure sensor is fixedly connected to the inner end of the high-strength spring, and the inner side surface of the pressure sensor is fixedly connected to the inner wall of the arc groove.

[0008] Preferably, a connecting plate is installed on the upper end of the circular ring block, and a plurality of mounting holes are opened on the connecting plate.

[0009] Preferably, a plurality of stiffening ribs are fixedly connected between the bottom of the connecting plate and the side of the circular ring block.

[0010] Preferably, three oil cylinders are equidistantly arranged along the inner circumference of the circular ring block.

[0011] Preferably, an oil filling pipe is installed on the outer side of the oil cylinder, the outer end of the oil filling pipe is connected to a connecting ring pipe, and a connecting port is fixedly connected to the connecting ring pipe.

[0012] Preferably, a limiting protrusion is fixedly connected to the inner side wall of the arc groove, a limiting groove is provided on the side of the arc plate, and the limiting protrusion is in sliding contact with the limiting groove.

[0013] Preferably, anti-slip grooves are evenly distributed on the inner curved surface.

[0014] Preferably, there are four groups of high-strength springs and pressure sensors evenly distributed along the outer curved surface.

[0015] Compared with the related art, the hydraulic slips for preventing drilling tool clamping damage proposed by the utility model have the following beneficial effects:

[0016] In the utility model, the hydraulic slips for preventing the drilling tool from being damaged by clamping are provided with a clamp assembly, in which a combination design of a slider and an arc plate is used, a high-strength spring is connected between the arc groove inside the slider and the arc plate, so that the arc plate and the slider have a certain deformation ability, and when the inner arc surface of the arc plate clamps the drilling tool, it is an elastic contact clamping, avoiding the disadvantage that the rigid clamping force is not easy to control, and when clamping, the elastic force of the high-strength spring is used to make the drilling rig better controlled when applying hydraulic loading, and can gradually The drill tool on the inner side of the inner arc surface is gradually clamped to avoid the side wall of the drill tool being sunken due to excessive clamping force during rigid clamping, thereby improving the protection of the drill tool and preventing damage to the drill tool during the clamping process. In addition, a pressure sensor is provided at the bottom of the high-strength spring. The control processing system in the drilling rig can calculate the clamping force applied by the inner arc surface to the inner drill tool by receiving the pressure value fed back by the pressure sensor, so that the drilling rig can accurately control the clamping force. By adjusting the appropriate clamping force, the clamping stability of the drill tool is improved, further improving the practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a hydraulic slip for preventing drilling tool clamping damage proposed by the utility model Figure 1 ;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of a hydraulic slip for preventing drilling tool clamping damage proposed by the utility model Figure 2 ;

[0019] Figure 3 A three-dimensional disassembly diagram of a hydraulic slip for preventing drilling tool clamping damage proposed by the utility model Figure 1 ;

[0020] Figure 4 This is a three-dimensional schematic diagram of the internal disassembly of the fixture assembly.

[0021] In the figure: 1. circular ring block; 2. connecting plate; 3. mounting hole; 4. oil cylinder; 5. clamp assembly; 51. slider; 52. arc groove; 53. limiting protrusion; 54. arc plate; 55. limiting groove; 56. inner arc surface; 57. anti-slip groove; 58. outer arc surface; 59. high-strength spring; 510. pressure sensor; 6. oil filling pipe; 7. connecting ring pipe; 8. connecting port; 9. stiffening rib plate. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0023] Reference Figure 1-4 , please refer to Figure 1-Figure 4 ,in, Figure 1 A schematic diagram of the three-dimensional structure of a hydraulic slip for preventing drilling tool clamping damage proposed by the utility model Figure 1 ; Figure 2 A schematic diagram of the three-dimensional structure of a hydraulic slip for preventing drilling tool clamping damage proposed by the utility model Figure 2 ; Figure 3 A three-dimensional disassembly diagram of a hydraulic slip for preventing drilling tool clamping damage proposed by the utility model Figure 1 ; Figure 4 A hydraulic slip for preventing drilling tool from being damaged by clamping comprises: a circular ring block 1, a cylinder 4 is provided inside the circular ring block 1, a clamp assembly 5 is slidably provided inside the cylinder 4, the clamp assembly 5 comprises a slider 51, the slider 51 is slidably installed inside the cylinder 4, an arc groove 52 is provided inside the slider 51, an arc plate 54 is slidably installed inside the arc groove 52, the arc plate 54 comprises an inner arc surface 56 and an outer arc surface 58, a high-strength spring 59 is fixedly installed on the outer arc surface 58, a pressure sensor 510 is fixedly connected to the inner end of the high-strength spring 59, and the inner side surface of the pressure sensor 510 is fixedly connected to the inner wall of the arc groove 52.

[0024] Through the above-mentioned arrangement, the high-strength spring 59 makes the connection between the arc plate 54 and the slider 51 have elastic deformation ability. When the inner arc surface 56 of the arc plate 54 clamps the drill bit, the force transmission path of its clamping force passes through the high-strength spring 59. Then, during the clamping process, the inner arc surface 56 first contacts the outer wall of the drill bit. As the oil pressure in the cylinder 4 gradually increases, the slider 51 is gradually pushed inward. At this time, since the inner arc surface 56 of the arc plate 54 is limited by the side wall of the drill bit, the high-strength spring 59 is compressed and the clamping force is provided by the rebound force of the high-strength spring 59. The entire clamping process is flexible clamping, which utilizes the rebound energy storage characteristics of the high-strength spring 59, avoids the disadvantage that the rigid clamping process easily causes the outer wall of the drill bit to be dented, and improves the protection of the drill bit.

[0025] In this embodiment, a connecting plate 2 is installed on the upper end of the circular ring block 1 , a plurality of mounting holes 3 are opened on the connecting plate 2 , and a plurality of stiffening ribs 9 are fixedly connected between the bottom of the connecting plate 2 and the side of the circular ring block 1 .

[0026] Through the above-mentioned arrangement, the arrangement of the connecting plate 2 provides an installation connection point for the device. In addition, the arrangement of the stiffening rib plate 9 strengthens the connection strength between the connecting plate 2 and the circular ring block 1, so that the connecting plate 2 has a higher connection stability.

[0027] In this embodiment, three oil cylinders 4 are equidistantly arranged along the inner circumference of the annular block 1 .

[0028] By the arrangement in the above manner, three oil cylinders 4 are provided, and the clamp assembly 5 inside thereof can clamp the drilling tool from three directions, and the clamping directions are all the center positions of the annular block 1, so that the clamping is more stable.

[0029] In this embodiment, an oil filling pipe 6 is installed and connected to the outside of the oil cylinder 4 , and a connecting ring pipe 7 is connected to the outer end of the oil filling pipe 6 , and a connecting port 8 is fixedly connected to the connecting ring pipe 7 .

[0030] Through the above-mentioned arrangement, the connection port 8 is connected to the hydraulic system of the drilling rig, and the hydraulic oil is input into the oil cylinder 4 through the connection port 8 via the connecting ring pipe 7 and the oil filling pipe 6. Then, under the action of pressure, the hydraulic oil inside the oil cylinder 4 can push the entire clamp assembly 5 to slide inward, thereby clamping the drilling tool.

[0031] In this embodiment, anti-slip grooves 57 are evenly distributed on the inner arc surface 56 .

[0032] By configuring in the above manner, the anti-slip groove 57 increases the roughness of the inner arc surface 56, thereby increasing the friction coefficient of the inner arc surface 56. When the drill is clamped, the clamping friction is higher, thereby improving the clamping stability.

[0033] In this embodiment, four groups of high-strength springs 59 and pressure sensors 510 are evenly distributed along the outer arc surface 58 .

[0034] Through the above-mentioned arrangement, four groups of high-strength springs 59 and pressure sensors 510 are evenly distributed along the outer arc surface 58, thereby improving the connection strength between the arc plate 54 and the slider 51. At the same time, multi-point evenly distributed pressure sensors 510 are used to make the pressure detection value more accurate and improve practicality.

[0035] In this embodiment, a limiting protrusion 53 is fixedly connected to the inner side wall of the arc groove 52 , a limiting groove 55 is provided on the side of the arc plate 54 , and the limiting protrusion 53 is in sliding contact with the limiting groove 55 .

[0036] By the above arrangement, the limiting protrusion 53 and the limiting groove 55 are in sliding contact, so that the arc plate 54 is slidably engaged with the inner side of the arc groove 52 to avoid sliding out of the arc groove 52 under the action of the rebound force of the high-strength spring 59.

[0037] The working principle of a hydraulic slip for preventing drilling tool clamping damage provided by the utility model is as follows:

[0038] When in use, the drill tool is inserted into the inner side of the annular block 1, and the connection port 8 is connected to the hydraulic system of the drilling rig. The hydraulic oil is input into the oil cylinder 4 through the connecting ring pipe 7 and the oil filling pipe 6 through the connection port 8, and then the hydraulic oil inside the oil cylinder 4 pushes the entire clamp assembly 5 to slide inward under the action of pressure. After the inner arc surface 56 in the clamp assembly 5 contacts the outer wall of the drill tool, the high-strength spring 59 is compressed under the continuous inward push of the slider 51. As the compression deformation of the high-strength spring 59 increases, the clamping force transmitted to the drill tool by its rebound force gradually increases. The pressure value is measured by the pressure sensor 510 on the rear side of the high-strength spring 59 and transmitted to the control processing system in the drilling rig. The control processing system calculates the clamping force applied by the inner arc surface 56 to the inner drill tool, so that the drilling rig can accurately control the clamping force.

[0039] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydraulic slip for preventing drilling tool clamping damage, characterized in that: It comprises a circular ring block (1), an oil cylinder (4) is provided on the inner side of the circular ring block (1), and a clamp assembly (5) is slidably provided on the inner side of the oil cylinder (4); The clamp assembly (5) comprises a slider (51), the slider (51) being slidably mounted on the inner side of the oil cylinder (4), the slider (51) being provided with an arc groove (52) inside, an arc plate (54) being slidably mounted on the inner side of the arc groove (52), the arc plate (54) comprising an inner arc surface (56) and an outer arc surface (58), a high-strength spring (59) being fixedly mounted on the outer arc surface (58), the inner side end of the high-strength spring (59) being fixedly connected to a pressure sensor (510), and the inner side surface of the pressure sensor (510) being fixedly connected to the inner wall of the arc groove (52).

2. A hydraulic slip for preventing drilling tool clamping damage according to claim 1, characterized in that: A connecting plate (2) is mounted on the upper end of the circular ring block (1), and a plurality of mounting holes (3) are formed on the connecting plate (2).

3. A hydraulic slip for preventing drilling tool clamping damage according to claim 2, characterized in that: A plurality of stiffening ribs (9) are fixedly connected between the bottom of the connecting plate (2) and the side of the circular ring block (1).

4. The hydraulic slip for preventing drilling tool clamping damage according to claim 1, characterized in that: Three oil cylinders (4) are arranged at equal distances along the inner circumference of the circular ring block (1).

5. The hydraulic slip for preventing drilling tool clamping damage according to claim 1, characterized in that: An oil injection pipe (6) is installed in communication with the outside of the oil cylinder (4), the outer end of the oil injection pipe (6) is connected to a connecting ring pipe (7), and a connecting port (8) is fixedly connected to the connecting ring pipe (7).

6. The hydraulic slip for preventing drilling tool clamping damage according to claim 1, characterized in that: A limiting protrusion (53) is fixedly connected to the inner side wall of the arc groove (52), a limiting groove (55) is provided on the side of the arc plate (54), and the limiting protrusion (53) is in sliding contact with the limiting groove (55).

7. The hydraulic slip for preventing drilling tool clamping damage according to claim 1, characterized in that: Anti-slip grooves (57) are evenly distributed on the inner arc surface (56).

8. The hydraulic slip for preventing drilling tool clamping damage according to claim 1, characterized in that: The high-strength springs (59) and pressure sensors (510) are evenly distributed in four groups along the outer arc surface (58).

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