Oil well polish rod sealer with sealing padding capable of being injected

Abstract

An oil well polish rod sealer with sealing padding capable of being injected comprises a box body, a box seat and an elastic compensation annular part, wherein the box body is arranged on the box seat, the box body and the box seat are connected and fixed through a connector, a through cavity is formed in the box body in the axial direction, a stop ring is embedded in an upper end port of the cavity, the upper end of the elastic compensation annular part can be movably embedded in a lower end port of the box body and can be tightly attached to the inner lateral surface of the box body, the lower end of the elastic compensation annular part is contained in an annular part of the upper end of the box seat, a through hole passage is further formed in the box seat in the vertical direction and is communicated with the annular part, an annular shoulder cavity is formed between the annular part and the through hole passage, a padding chamber is formed in the part between the stop ring of the cavity and the elastic compensation annular part, an injecting port is formed in the lateral wall of the box body, and an injecting nozzle for injecting sealing padding is installed at the injecting port. When a polish rod can movably and correspondingly penetrate through the stop ring, the padding chamber, the elastic compensation annular part and the through hole passage, the outer surface of the polish rod makes sealed contact with the stop ring and the upper end of the elastic compensation annular part.

Description

technical field [0001] The invention belongs to a device in the field of petroleum exploitation, in particular, it is a sealer for oil well polished rods that can be injected with sealing packing. Background technique [0002] Oil production wellhead polished rod sealer is a necessary wellhead tool for all pumping wells. The conventional wellhead polished rod sealer mainly relies on the rubber packing in it to achieve sealing through the pressing force of the gland and the pressing force of the radial screw to make the packing tightly hug the polished rod. This sealer must stop pumping and stop production when replacing the packing, thereby bringing adverse effects to normal production, reducing production time rate and affecting output. [0003] In view of the defects in the above-mentioned known technologies, the inventor has developed a seal packing injectable oil well polished rod sealer based on years of experience in production design in this field and related fields....

AI Technical Summary

Problems solved by technology

This kind of sealer must stop pumping and stop production when replacing the packing, thus bringing adverse effects on normal production, reducing production time and affecting output

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