A polished rod seal

Abstract

The invention discloses a polished rod sealer, which comprises a spherical flange, the bottom of the spherical flange is connected with a wellhead seat, and the top of the spherical flange is connected with an azimuth adjustment device, and the top of the azimuth adjustment device is connected with a A horizontal offset adjustment device, the azimuth adjustment device is composed of an adjustment cavity, a fixed cavity, an electro-hydraulic rod and a masonry sphere, and the top of the horizontal offset adjustment device is connected with a well stop sealing body, and the well stop sealing body It consists of a packing cavity, a second adjustment cavity, a threaded bolt, a threaded sleeve, a threaded rod, an extruded plate and a packing. The bottom is the through cavity. This device effectively increases the wear resistance of the device, prevents the loss of time and cost caused by repeated replacement of the packing, effectively increases the efficiency, and the device can be used more flexibly Rotation angle, thereby improving the applicability of the device.

Description

technical field [0001] The invention belongs to the technical field of light-sensitive sealers, in particular to a light rod sealer. Background technique [0002] In the production of heavy oil reservoirs, the commonly used method is to inject high-temperature and high-pressure steam for production. Generally, steam injection is performed first, and then the production string is replaced for production. This method is completed in two steps. This method has high operating costs and takes up well time. It is also longer, and then there is an integrated process of steam injection and oil production, which shares one string and only operates once, which reduces operating costs and well occupation time. At the same time, the supporting wellhead device also needs to match it, and the polished rod sealer is a kind of wellhead device. The sealing process of the polished rod sealer is as follows: Put the sealing ring on the polished rod, press the pressing sleeve on the sealing rin...

AI Technical Summary

Problems solved by technology

[0003] However, due to the influence of various factors such as downhole working conditions, manufacturing precision of the oil pumping equipment, and deformation of parts of the oil pumping equipment after bearing loads, the axis of the polished rod and the axis of the polished rod sealer are likely to deviate. During the reciprocating movement of the polished rod up and down, it will be accompanied by a horizontal displacement in a certain direction (that is, "swing"), which will cause uneven force on the contact surface between the sealing ring and the polished rod, and the side of the sealing ring that is stressed is worn Faster (i.e. "eccentric wear"), reducing the service life of the seal

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