CN2357123Y

CN2357123Y - Self-sealed blow-out preventing box

Info

Publication number: CN2357123Y
Application number: CN 98236237
Authority: CN
Inventors: 曾维康
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-08-18
Filing date: 1998-08-18
Publication date: 2000-01-05
Anticipated expiration: 2008-08-18

Abstract

The utility model relates to a self-sealed blow-out preventing box which can prevent an oil field well mouth from leaking. A box body is installed on the pipe end of an oil pipe, and a combined self-sealed body, a gasket, and a box cover are installed in the box body. The combined self-sealed body can improve a bias wearing problem basically, following the position of a polished rod in the box body. The combined self-sealed body can reinforce sealed effects in the function of pressure in an oil well, and therefore, oil liquid is prevented from leaking.

Description

Self-sealing blowout prevention box

The utility model relates to a kind of oil field shaft mouth sealing device that is used for, and particularly can prevent oil well in oil pumping process, and fluid leaks from the oil pumping polish rod limit.

The oil well blowout hookup that use at present in the oil field is known from disclosed data, generally all adopts packing seal in blowout hookup, encapsulant adopts rubber and asbestos more, because its frictional resistance is big, easy to wear, generally uses 3-15 days needs to change or adjust, oil-extractor polish-rod is exposed for a long time in the open air, the dust that is stained with, bring in the sealed packing with the polished rod motion, accelerate the polished rod wearing and tearing again, the gap is strengthened, seal failure, the fluid that leaks outside causes the pollution in equipment and place again.

For sort this problem out, need the maintenance personal to adjust often and compress packing, or change encapsulant, produce but normal influence is normal in maintenance process.

The purpose of utility model provides a kind of novel self-sealing blowout prevention box, and it not only can rely on the elasticity of combination self-styled body self to seal, and also relies on the pressure in the oil well, acts on enhanced leaktightness effect on the self-styled body of combination.

The purpose of this utility model is achieved in that the box body of this device is contained on the oil pipe, and the self-styled body of combination, pad are housed in box body.The self-styled body of combination in the box body is located by oil pumping polish rod, to oil pumper because alignment error and foozle, caused oil pumping polish rod misaligns, thereby the eccentric wear that causes has basic improvement, the material that makes up self-styled body has adopted the macromolecular elastomer material, and set up dust ring on top, reduce dust and entered the sealing position, slowed down and sealed the wearing and tearing at position, self-styled body bottom is the sealing position, its internal diameter size is littler than polished rod external diameter, can rely on its elastic force sealing, relies on the oil well pressure in the oil well to make the sealing position be adjacent to polished rod on the other hand, strengthened sealing effectiveness, also can eliminate the gap of causing after the wearing and tearing, reach self-styled purpose, effectively solve the leakage of fluid.

The concrete device of utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the device schematic diagram according to the self-sealing blowout prevention box that the utility model proposes.

Describe details and working condition thereof in detail below in conjunction with Fig. 1 according to the concrete device that the utility model proposes.

In the box body of this device (1), be equipped with in conjunction with self-styled body (2), lid (3), pad (4) also are enclosed within on the polished rod (5).The internal thread of box body (1) lower end is threaded with oil pipe pipe end (6), makes up self-styled body (2) by the polished rod in the oil pipe (5) location, and fixing under the effect of pad (4) and lid (3).The pressure of fluid (7) acts on the bottom of the self-styled body of combination (2), make the self-styled body of combination (2) be adjacent to polished rod, strengthen sealing effectiveness, because the effect of the dust ring on the self-styled body of combination, reduce entering of dirt sand, thereby reduced the wearing and tearing of self-styled body sealing surface and polished rod, thus sealing polished rod (5) that can be reliably and with long-term, thus the leakage of fluid (7) prevented.

Claims

1. the self-sealing blowout prevention box that uses of an oil field shaft mouth, this device by a box body, make up self-styled body, lid, pad are formed, it is characterized in that making up self-styled body can locate the position according to polished rod in box body, make up self-styled body upper end and be dust ring, the lower end is a sealing surface, and its material has adopted the high score elastomeric material.