CN2594450Y - Eccentric backing ring on hole top - Google Patents

Abstract

The utility model relates to a wellhead eccentric backing ring with the capability of adjusting the disalignment between a sealing device of a polished rod and a sucker rod. The utility model is formed by that the backing ring is designed so that a part of the backing ring is relatively thick, and the other part of the backing ring is relatively thin; thereby, different axial lines of an upper and a lower planes of the eccentric backing ring are formed, which means that eccentricity is formed. After the eccentric backing ring is padded, a sealing device of a polished rod is tilted to the relatively thin side of the eccentric backing ring in a certain angle, and thereby, a tilt angle formed between the sealing device of a polished rod and a sucker rod as a result of installation problems is counteracted. The utility model has the advantages of convenient realization of the adjustment of the tilt angle formed between the sealing device of a polished rod and a sucker rod as a result of installaion, good sealing effect, firmness, simple structure, and long service life.

Description

The well head Eccentric backing ring

Affiliated technical field

The utility model relates to a kind of well head Eccentric backing ring, can adjust to the disalignment between polished rod sealer and the sucker rod coaxial.

Background technology

At present, extensively adopt adjustable union to adjust the disalignment of polished rod sealer and sucker rod on the oil field.This method cost height, sealing difficulty be big, easily loosening, application life is short.

Summary of the invention

In order to solve the out-of-alignment problem that existing facilities fail solves polished rod sealer and sucker rod in the oil well easily, the utility model provides a kind of well head Eccentric backing ring, and this gasket ring can be adjusted the out-of-alignment problem of polished rod sealer and sucker rod easily.

The technical scheme that the utility model technical solution problem is adopted is: the gasket ring that uses on the well head is designed to eccentric structure, i.e. and Eccentric backing ring, the part of gasket ring is different with the thickness of another part, and the upper and lower surface decentraction that forms gasket ring is promptly eccentric.When gasket ring is encased inside between front band joint and the lower catch hoop joint, because the thickness difference of gasket ring, make polished rod sealer offset polished rod sealer and the formed angle of inclination of sucker rod disalignment, guaranteed that polished rod sealer and sucker rod are coaxial to the thin lopsidedness certain angle of gasket ring.

The beneficial effects of the utility model are can realize adjusting polished rod sealer and the formed angle of slope of sucker rod easily, its good sealing effect, fastening jail, simple in structure, long service life.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the utility model general assembly structural representation;

Fig. 2 is the utility model partial sectional view;

Fig. 3 is the utility model vertical view;

Fig. 4 is the utility model left view.

Among the figure, 1 is that Eccentric backing ring, 2 is that last plane, 3 is that gasket ring inner seal face, 4 is that sealing surface outside the gasket ring, 5 is that lower plane, 6 is that lower catch hoop joint, 7 is that clip, 8 is that front band joint, 9 is that polished rod sealer, 10 is a sucker rod.

Fig. 2, Fig. 3, Fig. 4 are structure situation of the present utility model, it is thinner that Eccentric backing ring (1) is designed to the thicker another part of a part, two planes 2. up and down, (5) different axis promptly form Eccentric backing ring (1) for Eccentric backing ring (1), and Eccentric backing ring (1) is provided with inner seal face (3) and outside sealing surface (4).

As shown in Figure 1, Eccentric backing ring (1) is fixed between front band joint (8) and the following hoop joint (6) by clip (7), when polished rod sealer (9) and sucker rod (10) disalignment, by after being encased inside Eccentric backing ring (1) adjustment between front band joint (8) and the lower catch hoop joint (6), the polished rod sealer (9) of connection that has guaranteed Eccentric backing ring (1) top is coaxial with sucker rod (10), thereby realized the purpose of the different axis of adjustment sucker rod 10 and polished rod sealer (9) to coaxial line.

Claims (1)

1. well head Eccentric backing ring, it is thicker to it is characterized in that Eccentric backing ring is designed to a part, and another part is thinner, and different axis in two planes up and down.

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