CN212249893U - Eccentric wear prevention device for oil well of oil field - Google Patents

Abstract

The utility model provides an oil field oil well eccentric wear prevention device, includes halfcylinder A (7) and halfcylinder B (8), and halfcylinder A (7) become spiral concatenation cylinder with halfcylinder B (8), have the nut fixed, form the hole in the middle of the concatenation back, and helical passage runs through spiral concatenation cylinder, and in the embodiment, it is static to pump oil pipe, and the sucker rod up-and-down motion, its hole and sucker rod clearance fit, surface and the intraductal surface clearance fit of pump oil. When liquid flows through the spiral channel from the liquid inlet E, the liquid generates a certain axial force on the cylinder to drive the cylinder to rotate, so that the abrasion is reduced, and the service life is prolonged.

Description

Eccentric wear prevention device for oil well of oil field

Technical Field

The utility model belongs to the technical field of oil well construction auxiliary device, concretely relates to oil field oil well eccentric wear prevention device.

Background

At present, most of oil well eccentric wear prevention devices commonly used in low-permeability oil wells in oil fields are fixed on a sucker rod, the eccentric wear prevention devices are static relative to the sucker rod, and the eccentric wear prevention devices move up and down relative to an oil pumping pipe.

Disclosure of Invention

In order to overcome the not enough of above-mentioned prior art, the utility model aims at providing an oil field oil well eccentric wear device has solved above defect, and the surface is rotatory and the contact of oil pipe inner wall, and area of contact is big, and is longe-lived, but the connected mode of its two semicircles body is the anchor and detains, has the defect that the easy disconnection drops in the in-service use of production. The device improves the connection mode into spiral track buckle connection and threaded connection, so that the connection is firmer and more durable.

In order to realize the purpose, the utility model discloses a technical scheme is:

the utility model provides an oil field oil well eccentric wear prevention device, includes halfcylinder A (7) and halfcylinder B (8), its characterized in that, halfcylinder A (7) become spiral concatenation cylinder with halfcylinder B (8), have the nut fixed, form hole (1) in the middle of the concatenation back, spiral passageway (2) run through spiral concatenation cylinder.

The spiral channels (2) are uniformly distributed and adopt 4 spiral channels.

The utility model has the advantages that:

this device improves the connected mode into spiral track buckle connection and threaded connection, makes its connection more firmly durable, and its inner bore and sucker rod clearance fit when liquid flows through device helical passage, produce axial force, drive the device rotation, device surface contact with the oil pipe inner wall in turn. The abrasion is reduced and the service life is prolonged.

The device overcomes the defects that the contact surface of the eccentric wear prevention device and the inner wall of the oil pumping pipe is narrow, the wear surface is fixed at a certain position in the prior art, the outer surface rotates to be in contact with the inner wall of the oil pipe, the contact area is large, the wear of an oil rod and the eccentric wear prevention device is effectively reduced, the service life is prolonged, the consumption of materials such as the oil rod, an oil rod centralizer and the like is reduced, and a part of materials and well repairing cost can be saved every year.

The device has low cost and good economic and social benefits, and is suitable for popularization and application.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a developed plan view along a spiral path.

Fig. 3 is a schematic view of the structure of the left and right semi-circular anchor.

FIG. 4 is a structural operation diagram of the apparatus.

Wherein, 1 is an inner hole; 2 is a spiral channel; 3 is the outer surface; 4 is a sucker rod; 5 is the inner surface of the oil pumping pipe; 7 is a semi-cylinder A; and 8 is a semi-cylinder.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in figures 1, 2 and 3, the eccentric wear prevention device for the oil well in the oil field comprises a semi-cylinder A (7) and a semi-cylinder B (8), and is characterized in that the semi-cylinder A (7) and the semi-cylinder B (8) form a spiral splicing cylinder, a nut is fixed, an inner hole (1) is formed in the middle of the splicing cylinder, and a spiral channel (2) penetrates through the spiral splicing cylinder.

The spiral channels (2) are uniformly distributed and adopt 4 spiral channels.

The utility model discloses a theory of operation is:

in the embodiment of fig. 4, the oil pumping pipe (5) is static, the sucker rod (4) moves up and down, the inner hole (1) of the sucker rod is in clearance fit with the sucker rod (4), and the outer surface (3) of the sucker rod is in clearance fit with the inner surface (5) of the oil pumping pipe. When liquid flows through the spiral channel (2) from the liquid inlet E, the liquid generates a certain axial force on the cylinder to drive the cylinder to rotate.

Claims (1)

1. The utility model provides an oil field oil well eccentric wear prevention device, includes halfcylinder A (7) and halfcylinder B (8), its characterized in that, halfcylinder A (7) become spiral concatenation cylinder with halfcylinder B (8), connect through spiral track buckle and the nut is fixed, forms hole (1) in the middle of the concatenation back, spiral concatenation cylinder is run through in screw channel (2), screw channel (2) evenly distributed, adopt 4.

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