CN2156281Y

CN2156281Y - Well sealing device for oil suction machine with rod

Info

Publication number: CN2156281Y
Application number: CN 93201729
Authority: CN
Inventors: 王家戟; 王世珍
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-01-17
Filing date: 1993-01-17
Publication date: 1994-02-16
Anticipated expiration: 2003-01-17

Abstract

The utility model relates to a rod beam-pumping unit well head sealing device, which is composed of a pressing cap, a pressing cover and multi-stage sealing rings. The utility model can accomplish multi-stage sealing and multi-stage automatic lubrication with an oil ring, and the oil ring is formed by an annular space between the effective radial deformation and the sealing ring of a sealing ring with an octagon cross-section. The utility model not only enhances the sealing effect which seals oil, gas and water, but also extends service life of the sealing ring. The service life is 2-3 times to the service life of a rectangular cross-section sealing ring, compared with a rectangular cross-section sealing ring, the utility model has the advantages of stable sealing performance, convenient installation and operation and material-saving use.

Description

Well sealing device for oil suction machine with rod

The utility model relates to a kind of sucker rod pumping motor-pumped well mouth sealing device.

In sucker rod pumping motor-pumped well mouth sealing device, adopt the rectangular cross section sealing ring to seal more, normally one group of sealing ring is superimposed, and is enclosed within on the sucker rod, when screwing pressure cap, makes it produce radial deformation, and seals.Because the radial deformation of rectangular cross section sealing ring is restricted, and does not have the space can not well make self-lubricate between sealing ring and the sucker rod between the sealing ring, thus sealing ring very easily abrasion lost efficacy, thereby cause the leakage and the environment pollution of well head oil, gas, water.According to statistics, like this, because frequent change sealing ring both influenced production, again caused the significant wastage of human and material resources at 5-10 days present one group of sealing ring average life.

In view of this, the inventor, design a kind of novel well mouth sealing device, it adopts octagon section structure sealing ring, be easier to produce radial deformation when making the sealing ring pressurized, reduce the gap between sealing ring and the sucker rod effectively, prevent that oil, gas, water from leaking outside, be processed with inside and outside chamfering on the sealing ring simultaneously, make to form a plurality of annular spaces between sealing ring and the polished rod, when sucker rod moved back and forth, the oil of well head, gas, water were full of annular space automatically and form oil ring, thereby play multistage lubricated, multi-stage sealed effect, prolonged the application life of sealing ring.And the outer chamfering of sealing ring makes it easy to install.

Do statement one by one below in conjunction with Figure of description.

Accompanying drawing one is a sectional drawing of the present utility model.

Accompanying drawing two is the sectional drawing of single sealing ring in the utility model.

With reference to accompanying drawing one, two, the utility model is a kind of by pressure cap, the sucker rod pumping motor-pumped well mouth sealing device that gland and multi-stage sealed circle are formed, sealing ring (1) is the octagon section structure in this device, on sealing ring (1), be processed with interior chamfering (2), outer chamfering (3), external cylindrical surface (4), inner cylinder face (5) and planar annular (6), when screwing pressure cap (9), gland (10) compresses sealing ring one by one, under pressure, octagon section sealing ring (1) produces radial deformation, by inner cylinder face (5), external cylindrical surface (4) and planar annular (6) are realized sealing ring (1) and sucker rod (11), effective sealing between sealing ring and packing box (12) and the sealing ring.Simultaneously, between the sealing ring, form annular space (7) and annular space (8) by inside and outside chamfering, when oil pumper is worked, oil in the oil well, gas, water are full of annular space (7) automatically, form multistage oil ring, thereby realize multistage self-lubricate and multi-stage sealed effect between sealing ring (1) and the sucker rod (11), prolonged the application life of sealing ring effectively.For sealing ring is enclosed within on the sucker rod easily, on one side sealing ring can be cut use.

What the utility model had overcome rectangular seal is difficult for radial deformation and poor lubrication, the shortcoming of wear out failure very easily, mutual stack by a plurality of octagonal section sealing rings, played multi-stage sealed and multistage lubricated effect, both strengthen sealing effectiveness and sealed oil, gas, water, prolonged again the service life of sealing ring. According to field experiment, the sealing ring in the utility model be service life existing rectangular seal 2-3 doubly. If use this sealing device will produce huge economical, societal benefits.

Claims

1, a kind of sucker rod pumping motor-pumped well mouth sealing device of forming by pressure cap, gland and multi-stage sealed circle, it is characterized in that sealing ring (1) is the octagon section structure, is processed with interior chamfering (2), outer chamfering (3), external cylindrical surface (4), inner cylinder face (5) and planar annular (6) on sealing ring (1).

2, sucker rod pumping motor-pumped well mouth sealing device according to claim 1 is characterized in that between sealing ring and the sealing ring, forms annular space (7) and annular space (8) by inside and outside chamfering between sealing ring and the sucker rod.