Directional eccentric wedge for deep hole small-caliber deviation correction

Abstract

The utility model relates to the technical field of deep hole drilling deviation correction, in particular to a directional eccentric wedge for deep hole small-caliber deviation correction, which comprises an eccentric wedge body, a positioning sleeve fixed at the bottom of the eccentric wedge body, a holding-up hammer arranged in the middle of the positioning sleeve, and a plurality of claw-shaped positioning cones fixed on the side surface of the bottom of the positioning sleeve. Eccentric positioning grooves are formed in the side face of the eccentric wedge body. The eccentric wedge solves the problems that when an existing eccentric wedge is fixed, a grouting system is needed to be matched and fixed, and operation is troublesome.

Description

Technical Field

[0001] The utility model relates to the technical field of deep hole drilling deflection correction, in particular to a directional eccentric wedge used for deep hole small-diameter deflection correction. Background Art

[0002] Wireline coring drilling technology has been widely used in current drilling processes. Due to the complexity of geological conditions and drilling processes, the drilling trajectory of deep-hole small-diameter wireline coring drilling is often difficult to control as the depth increases. Solving the problem of correcting the drilling trajectory is a key technology to ensure drilling quality, improve drilling efficiency, and reduce drilling costs.

[0003] The eccentric wedge in the prior art has a simple structure, mostly a cylindrical structure. During installation, it is directly inserted into the borehole through a drill rod and then fixed in position by grouting. The overall positioning operation is relatively cumbersome. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing eccentric wedges need a grouting system to cooperate and fix them when being fixed, which makes the operation more troublesome.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is a directional eccentric wedge for correcting the inclination of deep holes with small diameters, including an eccentric wedge body, a positioning sleeve fixed at the bottom of the eccentric wedge body, a top hammer provided in the middle of the positioning sleeve, a number of claw-shaped positioning cones fixed on the side of the bottom of the positioning sleeve, and an eccentric positioning groove provided on the side of the eccentric wedge body.

[0006] As a further solution of the present invention: a connecting rod is fixed on the top of the top hammer, and a drill rod is rotatably connected to the top thread of the connecting rod to drive the top hammer to move downward.

[0007] As a further solution of the present invention: one side of the top of the eccentric wedge body is connected with a top cylinder through a plurality of bolts, which is used to drive the eccentric wedge body to move downward.

[0008] As a further solution of the present invention, the top and bottom edges of the top hammer are both chamfered to facilitate the expansion of a plurality of claw-shaped positioning cones.

[0009] As a further solution of the present invention, the inner diameter of the positioning sleeve is smaller than the outer diameter of the top hammer, so that the top hammer can easily open the plurality of claw-shaped positioning cones at the bottom of the positioning sleeve.

[0010] As a further solution of the present invention, the eccentric wedge body, the positioning sleeve and the top hammer are all inserted into a drilled hole in the ground for installation of the eccentric wedge body.

[0011] Compared with the prior art, the advantages of the present invention are as follows: the present patent adds a positioning sleeve structure and a top hammer structure, the top hammer penetrates into the bottom of the hole, and then pressure is applied to the positioning sleeve to open the claw center positioning cone and embed it into the side of the drill hole to position the eccentric wedge body. The structure and operation are simple, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 This is a three-dimensional diagram of the overall structure of a directional eccentric wedge for correcting the deflection of deep holes with small diameters in the utility model;

[0014] Figure 2 This is a schematic diagram of the overall structure of a directional eccentric wedge for correcting the deflection of a deep hole with a small diameter located inside a drill hole;

[0015] Figure 3 This is an enlarged view of the structure of part A in a directional eccentric wedge used for correcting the deflection of deep holes with small diameters in the utility model;

[0016] Figure 4 This is an enlarged view of the B-part structure of a directional eccentric wedge used for correcting the deflection of deep holes with small diameters in the utility model.

[0017] In the attached figure:

[0018] 1. Eccentric wedge body; 2. Positioning sleeve; 3. Top hammer; 4. Claw-type positioning cone; 5. Connecting rod; 6. Drill rod; 7. Top cylinder; 1.1. Eccentric positioning groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] The utility model provides a technical solution for solving the existing problems raised in the background technology.

[0021] Combined with attachment Figure 1-3The top of the eccentric wedge body 1 is provided with an eccentric positioning groove 1.1, the eccentric wedge body 1, the positioning sleeve 2, and the top hammer 3 are all inserted into the drill hole in the ground for installing the eccentric wedge body 1.

[0022] The working principle of the present application is as follows: when installing the eccentric wedge body 1, first, the eccentric wedge body 1 and the positioning sleeve 2 are placed on the outside of the drill rod 6, and then the top hammer 3 is threadedly connected to the drill rod through the connecting rod 5, and then the eccentric wedge body 1 is connected to the top cylinder 7 by bolts. Then, the external drilling machine drives the entire structure deep into the drill hole, so that the eccentric positioning groove 1.1 remains in a vertical state;

[0023] When the top hammer 3 reaches the bottom of the hole, the top hammer 3 opens the plurality of claw-type positioning cones 4 through the deadweight of the eccentric wedge body 1 and the positioning sleeve 2, as well as the pressure of the hydraulic device connected to the top cylinder 7. The principle is similar to that of an expansion screw, which causes the plurality of claw-type positioning cones 4 to open and prop into the side of the borehole to achieve the positioning of the eccentric wedge body 1. Then, the pressure is continued to cut off the bolts connecting the eccentric wedge body 1 and the top cylinder 7 due to the shear force. Then, the drill rod 6 is rotated to gradually separate from the connecting rod 5. Then, the drill rod 6 and the top cylinder 7 are pulled out of the borehole to achieve the positioning.

[0024] When performing subsequent drilling, the sleeve for drilling positioning is arranged along the eccentric positioning groove 1.1, and drilling can be performed so that the new drilling direction is correct and the deflection correction effect is achieved.

[0025] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A directional eccentric wedge for correcting the deflection of a deep hole with a small diameter, comprising an eccentric wedge body (1), characterized in that: A positioning sleeve (2) is fixed at the bottom of the eccentric wedge body (1), a top hammer (3) is provided in the middle of the positioning sleeve (2), a plurality of claw-shaped positioning cones (4) are fixed on the side surface of the bottom of the positioning sleeve (2), and an eccentric positioning groove (1.1) is provided on the side surface of the eccentric wedge body (1).

2. The directional eccentric wedge for correcting the deflection of a small-diameter deep hole according to claim 1, characterized in that: A connecting rod (5) is fixed to the top of the top hammer (3), and a drill rod (6) is rotatably connected to the top of the connecting rod (5).

3. The directional eccentric wedge for correcting the deflection of a deep hole with a small diameter according to claim 1, characterized in that: One side of the top of the eccentric wedge body (1) is connected to a top cylinder (7) via a plurality of bolts.

4. The directional eccentric wedge for correcting the deflection of a deep hole with a small diameter according to claim 1, characterized in that: The top and bottom edges of the top hammer (3) are both chamfered.

5. The directional eccentric wedge for correcting the deflection of a deep hole with a small diameter according to claim 1, characterized in that: The inner diameter of the positioning sleeve (2) is smaller than the outer diameter of the top hammer (3).

6. The directional eccentric wedge for correcting the deflection of a deep hole with a small diameter according to claim 1, characterized in that: The eccentric wedge body (1), the positioning sleeve (2), and the top hammer (3) are all inserted into a drill hole located in the ground.

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