Centralizing sleeve for drilling machine

Abstract

The utility model relates to a righting sleeve for a drilling machine and belongs to the technical field of drilling machine parts. A righting sleeve for a drilling machine is installed on the upper end face of a clamp holder of the drilling machine and comprises an outer disc, a bearing and an inner sleeve. The bearing is arranged at a bearing position on the inner side of the outer disc; the inner sleeve is arranged on the inner side of the bearing; a pipe sleeve is inserted into the inner side of the inner sleeve, and the pipe sleeve is detachable; the outer disc is fixed to the upper end face of the clamping device through bolts. According to the technical scheme, the pipe sleeve is made of nylon materials, and the outer end face of the pipe sleeve is limited through a clamp spring. According to the righting sleeve for the drilling machine, the diameter change is realized through the arrangement of the sleeved pipe sleeve, so that the righting sleeve has multiple functions, and the pipe sleeve can play a role in reducing the abrasion of a drill rod. The centralizing sleeve and the pipe sleeve of the structure are convenient to replace.

Description

Technical Field

[0001] The utility model relates to a centralizing sleeve for a drilling rig, belonging to the technical field of drilling rig components. Background Art

[0002] In drilling rigs such as water well drilling rigs and exploration drilling rigs, deep holes are drilled through drill pipes. A gripper is provided on the drilling rig to clamp and disassemble the drill pipes. The drill pipes are usually long, and a centralizing sleeve is usually provided to centralize the drill pipes so that the drill pipes maintain a vertical and stable state. The centralizing sleeve is installed on the gripper.

[0003] Currently, we have found that the existing centralizing sleeves and drill pipes are one-to-one, that is to say, a centralizing sleeve of one size model corresponds to a drill pipe of one size model. If the drill pipe is replaced, the centralizing sleeve needs to be replaced accordingly, which is rather troublesome and time-consuming in actual use. In addition, the existing centralizing sleeves are made of metal products, and the parts in direct contact with the drill pipes are also metal products, which are prone to wear with the drill pipes and have an impact on the service life of the drill pipes. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a centralizing sleeve for a drilling rig to solve the above technical problems.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A centralizing sleeve for a drilling rig is installed on the upper end face of the gripper of the drilling rig and includes an outer disc, a bearing and an inner sleeve; the bearing is installed in the bearing position inside the outer disc, and the inner sleeve is installed inside the bearing; a pipe sleeve is inserted and installed inside the inner sleeve, and the pipe sleeve is detachable; the outer disc is fixed on the upper end face of the gripper by bolts.

[0007] A further improvement of the technical solution of the utility model is that the pipe sleeve is made of nylon material, and the outer end face of the pipe sleeve is limited by a circlip.

[0008] A further improvement of the technical solution of the utility model is that the upper end of the inner sleeve has a flange edge, an oil port is arranged on the side surface of the flange edge of the inner sleeve, and the oil port communicates with the bearing position.

[0009] A further improvement of the technical solution of the utility model is that mounting ears are arranged on the side surface of the outer disc, and threaded mounting holes are arranged on the mounting ears.

[0010] A further improvement of the technical solution of the utility model is that a clamping groove is arranged on the outer side surface of the lower end of the inner sleeve, and an arc-shaped clamping plate for restricting the axial movement of the inner sleeve is installed in the clamping groove; a clamping plate support platform is arranged at the outer end of the arc-shaped clamping plate; and the outer end of the clamping plate support platform is limited by a circlip.

[0011] A further improvement of the technical solution of the utility model is that two bearings are provided.

[0012] Due to the adoption of the above technical solution, the technical effects achieved by the present utility model are as follows:

[0013] The drill pipe centralizer sleeve of the present utility model realizes diameter variation through the arrangement of the sleeved pipe sleeve, so that it can be adapted to drill pipes of various different diameters, realizing multiple uses of the centralizer sleeve and reducing costs.

[0014] The pipe sleeve of the present utility model is made of nylon material, which can reduce wear of the drill pipe and improve the service life of the drill pipe.

[0015] The present utility model uses snap rings to fix the inner sleeve and the pipe sleeve. The structure is simple, convenient for disassembly and assembly, and convenient for replacing parts.

[0016] The present utility model uses bearings to promote the rotation of the inner sleeve, and is provided with an oil port to facilitate lubricating oil filling for the bearings. The bearings are durable and work stably.

[0017] The centralizer sleeve of the present utility model has good use effect, making the drill more convenient to use and having good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0019] Figure 2 is a top view of the present utility model;

[0020] Figure 3 is a sectional view taken along line A-A of the present utility model;

[0021] Figure 4 is a schematic diagram of the disassembled state of the present utility model;

[0022] Among them, 1. outer disc, 2. bearing, 3. inner sleeve, 4. pipe sleeve, 5. snap ring, 6. oil port, 7. arc-shaped clamping plate, 8. clamping plate support platform, 9. bolt, 10. oil port plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0025] The utility model relates to a centering sleeve for a drilling rig, which is applied to drilling rigs such as water well drilling rigs and exploration drilling rigs. The centering sleeve is installed on the upper end face of the gripper of the drilling rig and is used for centering and guiding the drill pipe.

[0026] As Figures 1-4 shown, the centering sleeve includes an outer disc 1, a bearing 2, an inner sleeve 3 and a pipe sleeve 4. From the outside to the inside are the outer disc 1, the bearing 2, the inner sleeve 3 and the pipe sleeve 4 respectively. The outer disc 1 has through holes, and a bearing position is provided on the inner hole surface of the outer disc 1. The bearing 2 is installed on the bearing position. Then, the inner sleeve 3 is installed on the inner hole position of the bearing 2. Finally, the pipe sleeve 4 is inserted and installed inside the inner sleeve 3. The pipe sleeve 4 here is a detachable structure, and it can be selected whether to install the pipe sleeve 4 according to actual needs. By setting the pipe sleeve 4, the diameter can be changed to adapt to drill pipes of different diameters. The centering sleeve is fixed on the upper end face of the gripper by bolts 9. Specifically, the whole fixed installation of the centering sleeve is realized by fixing the outer disc 1 on the gripper with bolts 9. As shown in the figure, mounting ears are respectively arranged on the opposite side faces of the outer disc 1, threaded mounting holes are arranged on the mounting ears, and bolts 9 are installed at the threaded mounting holes.

[0027] In a specific implementation, the pipe sleeve 4 used in the centering sleeve is made of nylon material and has good wear resistance. The outer end of the pipe sleeve 4 has a flange edge, and an inner groove is arranged on the inner side surface of the inner hole position of the inner sleeve 3. When the pipe sleeve 4 is installed in the inner sleeve 3, the flange edge of the pipe sleeve 4 is exactly located at the position of the inner groove of the inner sleeve 3. At the same time, a snap ring groove is also arranged on the inner side surface of the inner sleeve 3. After the pipe sleeve 4 is installed in place, a snap ring 5 is installed in the snap ring groove to prevent the axial outward movement of the pipe sleeve 4.

[0028] The upper end of the inner sleeve 3 of the centering sleeve has a flange edge. Preferably, an oil port 6 can be arranged on the side surface of the flange edge of the inner sleeve 3, and the oil port 6 is communicated with the bearing position, so that it is convenient to inject lubricating oil into the bearing position through the oil port to ensure the good operation of the bearing. An oil port plug 10 is installed at the oil port 6. In a specific implementation, usually two bearings 2 can be arranged, and these two bearings are arranged in parallel.

[0029] As Figures 3-4As shown, for this centering sleeve, the inner sleeve 3 is located inside the outer disc 1, and the inner sleeve 3 needs to be axially limited. Since the inner sleeve 3 has a flange, the flange can play a role in axial limitation at one end after the inner sleeve 3 is installed. The axial limitation structure at the other end of the inner sleeve 3 is as follows: a clamping groove is provided on the outer side surface of the lower end of the inner sleeve 3, and the position of the clamping groove is outside the range of the outer disc 1 and close to the outer disc 1. An arc-shaped clamping plate 7 is installed in the clamping groove to limit the axial movement of the inner sleeve 3 through the arc-shaped clamping plate 7. The arc-shaped clamping plates 7 are usually two or three to form a ring. A clamping plate support platform 8 is provided at the outer end of the arc-shaped clamping plate 7 to support the arc-shaped clamping plate 7 and make the position of the arc-shaped clamping plate 7 stable. The clamping plate support platform 8 is of an arc structure, and the cross-section of the clamping plate support platform 8 is of a right-angle structure. Finally, a circlip 5 is used to limit the outer end of the clamping plate support platform 8, and a circlip groove is correspondingly provided.

[0030] The centering sleeve of the utility model realizes diameter variation through the setting of the sleeved pipe sleeve, thereby realizing the multi-purpose use of the centering sleeve, and the pipe sleeve can play a role in reducing the wear of the drill pipe.

[0031] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.

Claims

1. A drilling rig centralizing sleeve, mounted on the upper end surface of a drilling rig holder, characterized in that: The invention comprises an outer disk (1), a bearing (2) and an inner sleeve (3); the bearing (2) is mounted on a bearing position on the inner side of the outer disk (1), and the inner sleeve (3) is mounted on the inner side of the bearing (2); a pipe sleeve (4) is inserted and arranged on the inner side of the inner sleeve (3), and the pipe sleeve (4) is detachable; and the outer disk (1) is fixed to the upper end surface of the clamp by means of bolts (9).

2. The drilling rig centralizing sleeve according to claim 1, characterized in that: The pipe sleeve (4) is made of nylon material, and the outer end surface of the pipe sleeve (4) is limited by a retaining spring (5).

3. The drilling rig centralizing sleeve according to claim 1, characterized in that: The upper end of the inner sleeve (3) has a flange edge, and an oil port (6) is arranged on the side of the flange edge of the inner sleeve (3), and the oil port (6) is communicated with the bearing position.

4. The drilling rig centralizing sleeve according to claim 1, characterized in that: A mounting ear is provided on the side of the outer plate (1), and a threaded mounting hole is provided on the mounting ear.

5. The drilling rig centralizing sleeve according to claim 3, characterized in that: A clamping groove is provided on the outer side surface of the lower end of the inner sleeve (3), and an arc-shaped clamping plate (7) for limiting the axial movement of the inner sleeve (3) is installed in the clamping groove; a clamping plate support (8) is provided at the outer end of the arc-shaped clamping plate (7); and a clamping spring (5) is used to limit the outer end of the clamping plate support (8).

6. A drilling rig centralizing sleeve according to any one of claims 1 to 5, characterized in that: Two bearings (2) are provided.

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