Bearing applied to underground silt environment

Abstract

The utility model discloses a bearing applied in an underground silt environment, which comprises an inner sleeve body and an outer sleeve body, a plurality of wear-resistant parts I are arranged on the inner wall surface of the outer sleeve body in a dot-matrix manner, and a plurality of wear-resistant parts II are arranged on the outer peripheral surface of the inner sleeve body in a dot-matrix manner. A first wear-resistant part arranged on the inner wall face of the outer sleeve body and a second wear-resistant part arranged on the outer circumferential face of the inner sleeve body make contact and rotate. The wear-resistant part I and the wear-resistant part II are made of diamond; and the wear-resistant part I and the wear-resistant part II are cylindrical. Cylindrical blind holes are formed in the inner wall face of the outer sleeve body and the peripheral face of the inner sleeve body, the radially outward end of the first wear-resisting part is fixed in the blind hole in the inner wall face of the outer sleeve body, and the radially inward end of the first wear-resisting part is exposed out of the blind hole; the radial inward end of the second wear-resistant part is fixed in the blind hole in the peripheral face of the inner sleeve body, and the radial outward end of the second wear-resistant part is exposed out of the blind hole. The method has the advantages that the wear resistance can be remarkably improved, and the service life is prolonged; and the processing difficulty can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bearing applied in the mud environment of the well, belong to bearing technical field. BACKGROUND

[0002] A kind of special bearing, applied in extremely harsh environment, such as used in the mud of drilling downhole, bearing outer sleeve and inner sleeve cannot use ball or roller, more unable to use lubricating oil, only by the direct contact friction rotation between inner sleeve and outer sleeve to realize the function of bearing.

[0003] To improve the wear resistance of bearing inner sleeve and outer sleeve, the traditional method is to use high hardness material, but due to the low processing performance of high hardness material, and inner sleeve and outer sleeve have relatively complex installation structure, therefore, most of them adopt conventional metal material as the body of inner sleeve and outer sleeve which is easy to process, and then carry out surface hardening treatment on the friction surface of inner sleeve and outer sleeve to solve the wear problem, but such surface hardening treatment still has the following problems:

[0004] 1, limited by the characteristics of surfacing material itself, the wear resistance is still limited, and the service life is still short;

[0005] 2, surfacing process is fine, and high-precision inner and outer cylindrical surface is polished, which is very time-consuming and laborious. INVENTION CONTENTS

[0006] The technical problem to be solved by the utility model is: how to make the corresponding friction surface of bearing inner sleeve and outer sleeve more wear-resistant.

[0007] In view of the above problems, the technical solution provided by the utility model is:

[0008] A bearing applied in the mud environment of the well, comprising inner sleeve body and outer sleeve body, a plurality of wear-resistant parts one are arranged on the inner wall surface of the outer sleeve body in dot matrix mode, a plurality of wear-resistant parts two are arranged on the outer peripheral surface of the inner sleeve body in dot matrix mode, and the wear-resistant parts one arranged on the inner wall surface of the outer sleeve body and the wear-resistant parts two arranged on the outer peripheral surface of the inner sleeve body are contacted and rotated in application.

[0009] The material of the wear-resistant part one and the wear-resistant part two is diamond.

[0010] The wear-resistant part one and the wear-resistant part two are cylindrical.

[0011] Blind holes in cylindrical shape are arranged on the inner wall surface of the outer sleeve body and the outer peripheral surface of the inner sleeve body, one end of the wear-resistant part one radially outward is fixed in the blind hole of the inner wall surface of the outer sleeve body, one end radially inward is exposed outside the blind hole, and the inner end face is friction surface one;One end of the wear-resistant part two radially inward is fixed in the blind hole of the outer peripheral surface of the inner sleeve body, one end radially outward is exposed outside the blind hole, and the outer end face is friction surface two.

[0012] The friction surface one of the wear-resistant part one is a concave curved surface, and the curved surface axis line is coincident with the axis line of the outer sleeve body; the friction surface two of the wear-resistant part two is a convex curved surface matched with the concave curved surface, and the curved surface axis line is coincident with the axis line of the outer sleeve body.

[0013] The welding ring one is arranged between the blind hole opening of the outer sleeve body and the wear-resistant part one, and the wear-resistant part one is welded in the blind hole through the welding ring one; the welding ring two is arranged between the blind hole opening of the inner sleeve body and the wear-resistant part two, and the wear-resistant part two is welded in the blind hole through the welding ring two.

[0014] The gap between the wear-resistant part one and the wear-resistant part one arranged in the dot matrix mode is greater than the cross-sectional area of the welding gun nozzle, and the gap between the wear-resistant part two and the wear-resistant part two arranged in the dot matrix mode is greater than the cross-sectional area of the welding gun nozzle.

[0015] The gap between the wear-resistant part one and the wear-resistant part one arranged in the dot matrix mode is less than the cross-sectional area of the wear-resistant part two, and the gap between the wear-resistant part two and the wear-resistant part two arranged in the dot matrix mode is less than the cross-sectional area of the wear-resistant part one. Advantageous effects

[0016] 1. The wear resistance can be significantly improved, and the service life can be prolonged.

[0017] 2. The processing difficulty can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a disassembled schematic view of the outer sleeve body and the inner sleeve body of the bearing;

[0019] Figure 2 It is a sectional schematic view of the bearing;

[0020] Figure 3 It is a partial schematic view. Figure 2

[0021] In the figure: 1, outer sleeve body; 11, wear-resistant part one; 111, friction surface one; 12, welding ring one; 2, inner sleeve body; 21, wear-resistant part two; 211, friction surface two; 22, welding ring two. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with the drawings:

[0023] For example, Figure 1 , 2 ​As shown in the figure, a bearing applied in a downhole silt environment comprises an inner sleeve body 2 and an outer sleeve body 1, a plurality of wear-resistant pieces one 11 are arranged on the inner wall surface of the outer sleeve body 1 in a dot matrix manner, and a plurality of wear-resistant pieces two 21 are arranged on the outer peripheral surface of the inner sleeve body 2 in a dot matrix manner. In use, the wear-resistant pieces one 11 arranged on the inner wall surface of the outer sleeve body 1 and the wear-resistant pieces two 21 arranged on the outer peripheral surface of the inner sleeve body 2 are in contact and rotate. Here, the hardness and wear resistance of the selected wear-resistant pieces one 11 and wear-resistant pieces two 21 are much higher than that of the surfacing body, and the thickness of the wear-resistant pieces can also be thicker than that of the surfacing. Moreover, the wear-resistant pieces one 11 and wear-resistant pieces two 21 do not have a complex profile structure, so even if the hardness is very high, there is no need to excessively consider the processing difficulty. In this way, it is not necessary to use a layer-by-layer surfacing process to improve the wear resistance between the inner sleeve body 2 and the outer sleeve body 1, which can not only reduce the processing difficulty but also significantly improve the wear resistance.

[0024] As a preferred, the material of the wear-resistant pieces one 11 and wear-resistant pieces two 21 is diamond.

[0025] The wear-resistant pieces one 11 and wear-resistant pieces two 21 are cylindrical, which is convenient for turning processing, and is also beneficial to the drilling of the mounting hole.

[0026] As shown in the figure, Figure 2 , 3 The inner wall surface of the outer sleeve body 1 and the outer peripheral surface of the inner sleeve body 2 are both provided with cylindrical blind holes. The wear-resistant pieces one 11 are fixed at one end of the blind hole in the inner wall surface of the outer sleeve body 1, and the other end is exposed outside the blind hole, and the inner end face is a friction surface one 111. The wear-resistant pieces two 21 are fixed at one end of the blind hole in the outer peripheral surface of the inner sleeve body 2, and the other end is exposed outside the blind hole, and the outer end face is a friction surface two 211. The provision of the blind hole is beneficial to the stable fixation of the wear-resistant pieces one 11 and wear-resistant pieces two 21.

[0027] The friction surface one 111 of the wear-resistant pieces one 11 is a concave curved surface, and the curved surface axis line coincides with the axis line of the outer sleeve body 1. The friction surface two 211 of the wear-resistant pieces two 21 is a convex curved surface matched with the concave curved surface, and the curved surface axis line coincides with the axis line of the outer sleeve body 1, which is more conducive to the close combination of the friction surface one 111 and the friction surface two 211.

[0028] There is a welding ring one 12 between the blind hole opening of the inner wall surface of the outer sleeve body 1 and the wear-resistant pieces one 11, and the wear-resistant pieces one 11 are welded in the blind hole through the welding ring one 12. There is a welding ring two 22 between the blind hole opening of the outer peripheral surface of the inner sleeve body 2 and the wear-resistant pieces two 21, and the wear-resistant pieces two 21 are welded in the blind hole through the welding ring two 22.

[0029] The gap between the lattice-arranged wear-resistant pieces 11 and the wear-resistant pieces 11 is greater than the cross-sectional area of the welding gun nozzle, and the gap between the lattice-arranged wear-resistant pieces 21 and the wear-resistant pieces 21 is greater than the cross-sectional area of the welding gun nozzle, so as to ensure the smooth completion of welding.

[0030] The gap between the lattice-arranged wear-resistant pieces 11 and the wear-resistant pieces 11 is less than the cross-sectional area of the wear-resistant pieces 21, and the gap between the lattice-arranged wear-resistant pieces 21 and the wear-resistant pieces 21 is less than the cross-sectional area of the wear-resistant pieces 11, so as to ensure that the wear-resistant pieces 11 and the wear-resistant pieces 21 subjected to force do not fall into the array gap of the other.

[0031] The above examples are only used for more clearly describing the utility model, and cannot be regarded as limiting the protection scope covered by the utility model, and any equivalent modification shall be regarded as falling into the protection scope covered by the utility model.

Claims

1. A bearing for use in downhole muddy environments, comprising an inner sleeve body (2) and an outer sleeve body (1), characterized in that: A number of wear-resistant parts (11) are arranged in a dot matrix pattern on the inner wall surface of the outer body (1), and a number of wear-resistant parts (21) are arranged in a dot matrix pattern on the outer periphery surface of the inner body (2). When in use, the wear-resistant parts (11) arranged on the inner wall surface of the outer body (1) and the wear-resistant parts (21) arranged on the outer periphery surface of the inner body (2) come into contact and rotate.

2. The bearing for use in underground silty environments according to claim 1, characterized in that: The wear-resistant part one (11) and wear-resistant part two (21) are made of diamond.

3. The bearing for use in underground silty environments according to claim 2, characterized in that: The wear-resistant part one (11) and wear-resistant part two (21) are cylindrical.

4. The bearing for use in a muddy environment in underground mines according to claim 3, characterized in that: Cylindrical blind holes are provided on the inner wall surface of the outer sleeve body (1) and the outer peripheral surface of the inner sleeve body (2). The radially outward end of the wear-resistant part one (11) is fixed in the blind hole on the inner wall surface of the outer sleeve body (1), and the radially inward end is exposed outside the blind hole. Its inner end face is friction surface one (111). The radially inward end of the wear-resistant part two (21) is fixed in the blind hole on the outer peripheral surface of the inner sleeve body (2), and the radially outward end is exposed outside the blind hole. Its outer end face is friction surface two (211).

5. The bearing for use in downhole silty environments according to claim 4, characterized in that: The friction surface 1 (111) of the wear-resistant part 1 (11) is a concave curved surface, and its curved surface axis coincides with the axis of the outer body (1); the friction surface 2 (211) of the wear-resistant part 2 (21) is a convex curved surface that matches the concave curved surface, and its curved surface axis coincides with the axis of the outer body (1).

6. The bearing for use in downhole silty environments according to claim 4, characterized in that: A welding ring (12) is provided between the blind hole opening on the inner wall of the outer sleeve body (1) and the wear-resistant part (11), and the wear-resistant part (11) is welded into the blind hole through the welding ring (12); a welding ring (22) is provided between the blind hole opening on the outer circumference of the inner sleeve body (2) and the wear-resistant part (21), and the wear-resistant part (21) is welded into the blind hole through the welding ring (22).

7. The bearing for use in downhole silty environments according to claim 4, characterized in that: The gap between wear-resistant part one (11) arranged in a dot matrix pattern is greater than the cross-sectional area of ​​the welding torch nozzle, and the gap between wear-resistant part two (21) arranged in a dot matrix pattern is greater than the cross-sectional area of ​​the welding torch nozzle.

8. The bearing for use in a muddy environment in underground mines according to any one of claims 1-7, characterized in that: The gap between wear-resistant part one (11) arranged in a dot matrix and wear-resistant part one (11) is smaller than the cross-sectional area of ​​wear-resistant part two (21), and the gap between wear-resistant part two (21) arranged in a dot matrix and wear-resistant part two (21) is smaller than the cross-sectional area of ​​wear-resistant part one (11).

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