CN213234979U - Screw pump sucker rod direction centralizer - Google Patents

Abstract

The utility model provides a screw pump sucker rod guiding centralizer, which comprises a guide rod and a universal head, wherein the universal head is wholly spherical, a first limiting curved surface is arranged on the spherical surface around the axis of the guide rod, and the section of the first limiting curved surface is a square with a chamfer; the universal head is provided with a first guide surface which is a convex spherical surface; the inner wall of the positioning sleeve is provided with a second limiting curved surface matched with the first limiting curved surface, and the second limiting curved surface is matched with the first limiting curved surface and transmits torque; a second guide surface matched with the first guide surface is arranged, and the second guide surface is a concave spherical surface; the universal head can swing in the positioning sleeve; the positioning sleeve is detachably connected with the connecting piece; the guide rod can swing at an angle alpha relative to the positioning sleeve. The utility model discloses a centralizer direction effect and friction are effectual, the convenient assembly of split type structure and maintenance.

Description

Screw pump sucker rod direction centralizer

Technical Field

The invention relates to the technical field of oil pumping auxiliary equipment, in particular to a screw pump sucker rod guide centralizer.

Background

The screw oil pump oil extraction equipment is not only widely applied to crude oil extraction in oil fields, but also increasingly deepens into the coal bed gas development field, and the following problems exist in oil fields and coal bed gas development in China at present.

The sucker rod centralizer is an underground tool for preventing eccentric wear of an oil pumping well, the sucker rod moves up and down in an oil pipe, friction is easily generated between a rod and the wall of the oil pipe due to elastic deformation of the sucker rod, the sucker rod is easy to break off, the sucker rod centralizer has strong flexibility and is in contact with the inner wall of the oil pipe, the friction between the rod and the pipe can be reduced, the oil extraction service life of the oil pumping machine is prolonged, and the sucker rod centralizer has important application in the eccentric wear of the oil pumping well.

The inventor finds that the prior art has the following defects in the process of implementing the invention:

1. the guide effect and the antifriction effect of the existing guide centralizer are not ideal. 2. The current guide centralizer adopts an integrated structure, after a period of time, the centralizing sleeve needs to be replaced integrally, and the waste of integral replacement resources is large.

Disclosure of Invention

To the defect among the prior art, the utility model provides a screw pump sucker rod direction centralizer to reduce the friction of pole and pipe, make things convenient for maintenance part, reduce the wasting of resources.

The utility model provides a pair of screw pump sucker rod direction centralizer device, its characterized in that: comprises that

The universal joint is arranged at one end of the guide rod, the universal joint is integrally spherical, a first limiting curved surface is arranged on the spherical surface around the axis of the guide rod, and the section of the first limiting curved surface is a square with a chamfer;

the universal head is provided with a first guide surface which is a convex spherical surface;

the positioning sleeve is sleeved on the universal head (6), a second limiting curved surface matched with the first limiting curved surface is arranged on the inner wall of the positioning sleeve, and the second limiting curved surface is matched with the first limiting curved surface to transmit torque;

a second guide surface matched with the first guide surface is arranged, and the second guide surface is a concave spherical surface; the universal head can swing in the positioning sleeve;

the guide rod can swing at an angle alpha relative to the positioning sleeve.

Preferably, α is in the range of 1 to 10 °.

Preferably, the positioning sleeve is detachably linked with the connecting piece.

Preferably, the connecting piece is connected with the positioning sleeve through threads.

Preferably, the opening at one end of the positioning sleeve is larger than the outer diameter of the universal head, and the opening at the other end of the positioning sleeve is smaller than the outer diameter of the universal head; the universal head is accommodated in the positioning sleeve.

According to the technical scheme, the guide centralizer for the sucker rod of the screw pump has the following beneficial effects:

1. the mutual matching structure of the universal head and the positioning sleeve has good guiding effect; 2. the friction between the universal head structure and the positioning sleeve is small, so that the service life of the rod pipe is prolonged; 3. the underground angle of the sucker rod can be adjusted to be 1-10 degrees; 4. the detachable structure design is convenient for maintaining and replacing parts, and is economical and practical.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural view of a screw pump sucker rod guide centralizer according to the present invention;

FIG. 2 is a schematic structural view of the guide bar of the present invention;

FIG. 3 is a schematic structural view of the positioning sleeve;

fig. 4 is a schematic view of a matching structure of the second limiting surface of the positioning sleeve and the first limiting curved surface of the universal head.

In the figure, 1-connecting hoop, 2-centering sleeve, 3-guide rod, 4-connecting piece, 5-positioning sleeve, 6-universal head, 61-first limiting curved surface, 62-first guide surface, 51-second limiting curved surface and 52-second guide surface.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

The embodiment, as shown in fig. 1, a screw pump sucker rod direction centralizer, including connecting piece 4, the both ends of connecting piece 4 are equipped with the direction respectively and right the subassembly, the direction is right the subassembly and is included connecting hoop 1, right cover 2, guide bar 3 and position sleeve 5, the one end of guide bar 3 is equipped with universal head 6, the other end and the connecting hoop 1 of guide bar 3 are connected, right the suit of cover 2 on guide bar 3, universal head 6 holding is in position sleeve 5, universal head 6 is equipped with first spacing curved surface 61, position sleeve 5 is equipped with the spacing curved surface 51 of second with first spacing curved surface 61 assorted, the transmission moment of torsion, position sleeve 5 can dismantle with connecting piece 4 and link.

The universal head 6 is integrally spherical, a first limiting curved surface 61 is arranged on the spherical surface around the axis of the guide rod 3, and the section of the first limiting curved surface 61 is a square with a chamfer. The first limit curved surface 61 includes four flat surfaces 611.

The universal head 6 is provided with a first guide surface 62, and the first guide surface 62 is a convex spherical surface.

The inner wall of the positioning sleeve 5 is provided with a second limiting curved surface 51 matched with the first limiting curved surface 61, and the section of the second limiting curved surface 51 is a square with a chamfer. The second limit curved surface 51 is matched with the first limit curved surface 61, so that the universal head 6 is prevented from rotating relatively and transmitting torque.

The inner wall of the positioning sleeve 5 is provided with a second guide surface 52 matched with the inner wall, and the second guide surface 52 is a concave spherical surface. The universal head 6 can swing in the positioning sleeve 5. The second guide surface 52 prevents the universal head 6 from coming out of the positioning sleeve 5.

The positioning sleeve 5 is a barrel-shaped body, the opening at one end is larger than the outer diameter of the universal head 6, and the opening at the other end is smaller than the outer diameter of the universal head 6; the universal head 6 is accommodated inside the positioning sleeve 5.

The connecting piece 4 is connected with the positioning sleeve 5 through threads.

The ball top of the universal head 6 is contacted with the connecting piece 4, and both ends of the connecting piece 4 are respectively provided with a third guide surface 41 matched with the ball top of the universal head 6. The universal head 6 is slidable in the third guide surface 41.

When the sucker rod deflects, the first guide surface 62 and the second guide surface 52 are matched and slide relatively, 360-degree guide is realized, the guide rod 3 can swing relative to the positioning sleeve 5 by an angle alpha, and the range of alpha is 1-10 degrees.

When the transmission moment of torsion, connect the pumping rod, connect hoop 1, the pumping rod rotates and drives and connect hoop 1 and rotate to guide bar 3 rotates, and the spacing curved surface of 3 first spacing curved surfaces 61 of guide bar and assorted second 51 closely cooperate relatively, drive position sleeve 5 and rotate, thereby the transmission moment of torsion.

When in use, the rod end of the guide rod 3 passes through the positioning sleeve 5, the universal head 6 is accommodated in the positioning sleeve 5, the second guide surface 52 of the positioning sleeve 5 is matched with the first guide surface 62 of the universal head 6,

the first limit curved surface 61 of the universal head 6 is matched with the second limit curved surface 51 of the positioning sleeve 5 to transmit torque. The universal head 6 can swing in the positioning sleeve 5.

When the utility model discloses a connect the connector hoop 1 at centralizer both ends and connect the sucker rod after the operation of pumping, can realize rotary motion in order to be used for the operation of pumping.

When the axes of the sucker rods are not on the same straight line, namely in an eccentric state, the guide rods 3 respectively swing around the spherical center of the universal ball 6 along the first guide surfaces 62 and respectively deviate from the positioning sleeve 5 to adapt to the eccentricity of the oil pipe, and the first guide surfaces 62 are tightly matched with the second guide surfaces 52 of the positioning sleeve 5. During the operating condition, the sucker rod drives guide bar 3 and rotates, and the second spacing curved surface 61 of guide bar 3 cooperatees with the first spacing curved surface 51 of position sleeve 5 to the transmission moment of torsion. So as to realize the transmission of torque and the adjustment of the offset angle of the sucker rod under the eccentric state.

When the universal head 6 of the centralizer is damaged, the connecting piece 4 and the locating sleeve 5 only need to be disassembled, and the damaged universal head 6 is taken out to be renewed.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (5)

1. The utility model provides a screw pump sucker rod direction centralizer which characterized in that: comprises that

One end of the guide rod (3) is provided with a universal head (6), the universal head (6) is integrally spherical, a first limiting curved surface (61) is arranged on the spherical surface around the axis of the guide rod (3), and the section of the first limiting curved surface (61) is square with a chamfer; the universal head (6) is provided with a first guide surface (62), and the first guide surface (62) is a convex spherical surface;

the positioning sleeve (5) is sleeved on the universal head (6), a second limiting curved surface (51) matched with the first limiting curved surface (61) is arranged on the inner wall of the positioning sleeve, and the second limiting curved surface (51) is matched with the first limiting curved surface (61) to transmit torque;

the positioning sleeve (5) is provided with a second guide surface (52) matched with the first guide surface (62), and the second guide surface (52) is a concave spherical surface; the universal head (6) can swing in the positioning sleeve (5);

the angle that the guide rod (3) can swing relative to the positioning sleeve (5) is alpha.

2. The screw pump sucker rod guide centralizer of claim 1, wherein:

the value range of alpha is 1-10 degrees.

3. The screw pump sucker rod guide centralizer of claim 2, wherein:

the positioning device also comprises a connecting piece (4), and the positioning sleeve (5) is detachably connected with the connecting piece (4).

4. The screw pump sucker rod guide centralizer of claim 3, wherein:

the connecting piece (4) is connected with the positioning sleeve (5) through threads.

5. The screw pump sucker rod guide centralizer of claim 4, wherein:

an opening at one end of the positioning sleeve (5) is larger than the outer diameter of the universal head (6), and an opening at the other end of the positioning sleeve is smaller than the outer diameter of the universal head (6); the universal head (6) is accommodated in the positioning sleeve (5).

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