CN211342813U

CN211342813U - Low-friction-resistance replaceable sleeve stabilizer

Info

Publication number: CN211342813U
Application number: CN201922397735.3U
Authority: CN
Inventors: 周斌
Original assignee: Chengdu Gaopu Petroleum Engineering Technology Co Ltd
Current assignee: Chengdu Gaopu Petroleum Engineering Technology Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-25
Anticipated expiration: 2029-12-27

Abstract

The utility model provides a low frictional resistance's interchangeable cover stabilizer relates to oil, natural gas and geological exploration drilling engineering equipment technical field. The stabilizer comprises a stabilizer main body, a stabilizing sleeve and a pressing piece, wherein the main body comprises a lower connecting part, a limiting part, a spline shaft, an external thread part and an upper connecting part which are sequentially arranged from bottom to top; the center hole of the stabilizing sleeve is matched with the spline shaft, the stabilizing sleeve is sleeved on the spline shaft, the lower part of the stabilizing sleeve is limited by a limiting part, and the upper part of the stabilizing sleeve is limited by a pressing part and connected with an external thread part; the outer part of the stabilizing sleeve is provided with a rib and a groove, the rib is provided with a plurality of accommodating cavities, the accommodating cavities are spherical cavities with openings, and the accommodating cavities are internally provided with spherical balls which are matched with each other; the ball-shaped ball part protrudes out of the accommodating cavity and can rotate freely in the accommodating cavity. The stabilizer has small friction resistance to up-and-down sliding and rotation relative to the well wall, replaceable stable sleeve part, wide application range and long service life.

Description

Low-friction-resistance replaceable sleeve stabilizer

Technical Field

The utility model belongs to the technical field of oil, natural gas and geological exploration drilling engineering equipment, concretely relates to interchangeable cover stabilizer of low frictional resistance.

Background

A stabilizer for drilling is a device attached to the shaft of the drill string near the drilling tool to stabilize the drilling tool downhole against inclination of the drilling direction. The stabilizers are classified by their shape, including: helical line type stabilizer, straight edge type stabilizer and inclined straight edge type stabilizer. The stabilizer mainly comprises a body and connecting parts at two ends of the body, wherein the maximum outer diameter of the body is close to the outer diameter of the drill bit. At present, most of stabilizers are provided with a layer of wear-resistant material fixedly laid on spiral strips or ribs in the middle of a body, or a certain number of hard alloy blocks are embedded, so that the wear resistance of the stabilizer is improved. However, the structure enables the stabilizer to generate larger friction resistance when contacting with the well wall during working, so as to prevent the drill bit from sliding up and down and rotating and increase the operation load of the drilling machine; meanwhile, the torque of the drill rod can be increased, the drill rod is easy to break, and safety accidents are caused. In addition, most of the existing stabilizers are of an integrated structure, are usually only suitable for drill bits of one size, and have a small application range; when the outer wall wearing and tearing at body middle part, when the size changes, need in time change the stabilizer, the life of stabilizer is generally shorter, and the cost is higher.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low frictional resistance's interchangeable cover stabilizer, the relative wall of a well of this stabilizer slide from top to bottom and rotatory frictional resistance is little, and its stable cover part is removable, and application range is wide, long service life.

In order to achieve the above object, the utility model adopts the following technical scheme:

a low-friction-resistance replaceable sleeve stabilizer comprises a stabilizer body, a stabilizing sleeve and a pressing piece, wherein the body comprises a lower connecting part, a limiting part, a spline shaft, an external thread part and an upper connecting part which are sequentially arranged from bottom to top; the center hole of the stabilizing sleeve is matched with the spline shaft, the stabilizing sleeve is sleeved on the spline shaft, the lower part of the stabilizing sleeve is limited by a limiting part, and the upper part of the stabilizing sleeve is limited by a pressing part and connected with an external thread part; the outer part of the stabilizing sleeve is provided with a rib and a groove, the rib is provided with a plurality of accommodating cavities, the accommodating cavities are spherical cavities with openings, and the accommodating cavities are internally provided with spherical balls which are matched with each other; the ball-shaped ball part protrudes out of the accommodating cavity and can rotate freely in the accommodating cavity.

Further, the stabilizing sleeve outside is equipped with 3 vertical edges and ridges, every the vertical being equipped with on the edges and ridges two is listed as and holds the chamber, and two are listed as and hold the setting that staggers each other of chamber.

Furthermore, the accommodating cavity is a spherical cavity of 7/10-17/20. The spherical ball can be guaranteed to be limited in the accommodating cavity, and the spherical ball partially protrudes and cannot be separated.

Further, the ball-type balls are made of a hard alloy material. The spherical ball has high wear resistance, and the service life of the stabilizing sleeve is prolonged.

Furthermore, the diameter of the limiting part is larger than that of the spline shaft and smaller than that of the groove in the stabilizing sleeve. The stability sleeve is guaranteed to be limited on the spline shaft.

Furthermore, the compressing piece is small in upper part and large in lower part, and the outer diameter of the lower end of the compressing piece is larger than the diameter of the spline shaft and smaller than the diameter of the groove in the stabilizing sleeve. Ensuring that the stabilizing sleeve can be pressed downwards.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a stabilizer is equipped with stable cover, and stable cover cup joints through the spline with the spline shaft portion of main part to through spacing portion with compress tightly the spacing fixed of piece, its stable cover can change the use according to the wearing and tearing condition and drill bit size of a dimension, and it is convenient to change. On the outside arris muscle of stable cover, establish open-ended ball type and hold the chamber, hold the intracavity and establish partial convex ball-type ball, the ball can hold the intracavity and rotate wantonly. When the stabilizer is used, the protruding part of the spherical ball is in contact with the well wall, the spherical ball can rotate and roll freely, the relative movement of the stabilizer and the well wall is realized through the rolling of the spherical ball, and the friction resistance between the stabilizer and the well wall is effectively reduced. The stabilizer can be matched with drill bits of various sizes for use, the application range is wide, only the stabilizer sleeve needs to be replaced after the stabilizer is worn, the main body can be repeatedly utilized, and the cost is saved; the friction resistance between the drill rod and the well wall is small, the operation load of the drill rod and the drilling machine is effectively reduced, the production efficiency is improved, and the production cost is saved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural diagram of the main body of the present invention.

Fig. 3 is a schematic view of the overlooking structure of the middle body sleeve joint stabilizing sleeve of the present invention.

Fig. 4 is a schematic sectional view in the direction of a-a in fig. 1 according to the present invention.

Fig. 5 is a schematic view of the structure of the middle stabilizing sleeve of the present invention.

Reference numerals:

1: a main body; 11: a lower connecting portion; 12: a limiting part; 13: a spline shaft; 14: an external threaded portion; 15: an upper connecting portion; 2: a stabilizing sleeve; 21: a rib; 211: an accommodating chamber; 212: a spherical ball; 22: a trench; 23: a central bore; 3: and a pressing member.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 5, the embodiment of the present invention provides a low friction resistance interchangeable stabilizer, which is used for connecting a drill bit and a drill rod, and has the functions of centering the drill rod and stabilizing the drill bit, thereby preventing the drilling from inclining. The stabilizer comprises a stabilizer body 1, a stabilizing sleeve 2 and a pressing piece 3. The main body 1 includes a lower connecting portion 11, a limiting portion 12, a spline shaft 13, an external thread portion 14, and an upper connecting portion 15, which are sequentially arranged from bottom to top. The main body 1 is a cylindrical structure and is provided with a through hole penetrating along the central axis. The outer part of the lower connecting part 11 is used for connecting with a drill bit; the upper connection part 15 is intended to be connected with the lower end of a drill rod.

As shown in figure 1, the stabilizing sleeve 2 is provided with a central hole 23, the central hole 23 is matched with the spline shaft 13 in the middle of the main body 1, and the stabilizing sleeve 2 is sleeved on the main body 1 through the central hole 23 and the spline shaft 13 in a matching manner. The lower end of the stabilizing sleeve 2 is contacted with the limiting part 12 and is limited by the limiting part 12; the upper end of the stabilizing sleeve 2 is contacted with the lower end surface of the pressing piece 3, the pressing piece 3 is provided with internal threads, the internal threads are in threaded connection with the external thread part 14, and the pressing piece 3 presses the stabilizing sleeve 2 downwards from the upper end to carry out limiting and fixing.

The diameter of the limiting part 12 is larger than the minimum outer diameter of the spline shaft 13 and larger than the diameter of the central hole 23 of the stabilizing sleeve 2, so that the stabilizing sleeve 2 is limited to slide downwards. In order to ensure the beauty and practicability, the diameter of the limiting part 12 is preferably larger than the maximum diameter of the spline shaft 13 and smaller than the diameter of the groove 22 on the stabilization sleeve 2.

Furthermore, the pressing piece 3 is small in upper part and large in lower part, a connecting hole is formed in the middle of the pressing piece, internal threads are arranged in the connecting hole, the internal threads are matched with the external thread part 14 and are connected with the external thread part 14 through threads, and the diameter of the external thread part 14 is smaller than that of the spline shaft 13. The outer diameter of the lower end of the pressing piece 3 is larger than the minimum outer diameter of the spline shaft 13. For the sake of ensuring the aesthetic and practical appearance, it is preferable that the outer diameter of the lower end of the pressing member 3 is larger than the diameter of the spline shaft 13 and smaller than the diameter of the groove 22 on the stabilizer sleeve 2, i.e. it can contact the end of the stabilizer sleeve 2, but does not extend outside the circumference of the stabilizer sleeve 2.

As shown in fig. 1, 3, 4 and 5, the outer portion of the stabilizer sleeve 2 is provided with a rib 21 and a groove 22, the rib 21 is provided with a plurality of accommodating cavities 211, the accommodating cavities 211 are open spherical cavities, and the inner portion of the accommodating cavities is mounted on spherical balls 212 matched with the accommodating cavities. The ball-type ball 212 is partially protruded from the opening of the accommodating cavity 211, and the ball-type ball 212 can freely rotate in the accommodating cavity 211.

In a preferred embodiment, the number of ribs 21 of the stabilizing sleeve 2 is 3 and the number of corresponding grooves 22 is 3. 3 equal vertical settings of arris muscle 21, along the circumference evenly distributed of stable cover 2, vertically on every arris muscle 21 be equipped with two and hold chamber 211, two are listed as and hold the setting that staggers each other of chamber 211, only one holds chamber 211 on an arris muscle 21 on same horizontal plane promptly.

The accommodating cavity 211 is a cavity larger than a hemisphere, and is preferably a spherical cavity of 7/10-17/10. The spherical ball 212 is a sphere matched with the accommodating cavity 211, and the surface of the spherical ball is tangent to the inner wall of the accommodating cavity 211 in a sliding manner; the portion of the ball-type ball 212 protruding the receiving cavity 211 is used to contact the well wall. The accommodating cavity 211 is a cavity larger than a hemisphere, so that the spherical ball 212 is limited in the accommodating cavity 211 and can rotate in the accommodating cavity 211 without falling off.

The ball-type balls 212 should be made of a wear-resistant material, preferably a cemented carbide material, such as tungsten carbide, titanium carbide, etc.

In the foregoing, only certain exemplary embodiments have been described briefly. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings, or are orientations and positional relationships conventionally understood by those skilled in the art, which are merely for convenience of description and simplicity of description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Claims

1. A low-friction-resistance sleeve-replaceable stabilizer is characterized by comprising a stabilizer main body (1), a stabilizing sleeve (2) and a pressing piece (3), wherein the main body (1) comprises a lower connecting part (11), a limiting part (12), a spline shaft (13), an external thread part (14) and an upper connecting part (15) which are sequentially arranged from bottom to top; the center hole (23) of the stabilizing sleeve (2) is matched with the spline shaft (13), the stabilizing sleeve (2) is sleeved on the spline shaft (13), the lower part of the stabilizing sleeve is limited by a limiting part (12), and the upper part of the stabilizing sleeve is connected with the external thread part (14) for limiting through a pressing part (3); a rib (21) and a groove (22) are arranged outside the stabilizing sleeve (2), a plurality of accommodating cavities (211) are arranged on the rib (21), the accommodating cavities (211) are open spherical cavities, and spherical balls (212) which are matched with each other are arranged in the accommodating cavities (211); the ball-shaped ball (212) partially protrudes out of the accommodating cavity (211) and can rotate freely in the accommodating cavity (211).

2. A low-friction-resistance interchangeable sleeve stabilizer according to claim 1, characterized in that 3 vertical ribs (21) are arranged outside the stabilizer sleeve (2), two rows of accommodating cavities (211) are vertically arranged on each rib (21), and the two rows of accommodating cavities (211) are arranged in a staggered manner.

3. A low friction interchangeable sleeve stabilizer according to claim 1 or 2, characterized in that the receiving cavity (211) is a spherical cavity of 7/10-17/20.

4. A low friction interchangeable sleeve stabilizer according to claim 3 characterized in that the ball-type balls (212) are made of cemented carbide material.

5. Low friction interchangeable sleeve stabilizer according to claim 1 or 4, characterized in that the diameter of the limit stop (12) is larger than the diameter of the spline shaft (13) and smaller than the diameter of the groove (22) on the stabilizer sleeve (2).

6. Low friction interchangeable sleeve stabilizer according to claim 5 characterized in that the hold-down element (3) is smaller at the top and larger at the bottom, the outer diameter of the lower end being larger than the diameter of the spline shaft (13) and smaller than the diameter of the groove (22) in the stabilizer sleeve (2).