Non-smooth flexible rope corrugated pipe wellhead sealing device

Abstract

The invention discloses a non-smooth flexible rope corrugated pipe wellhead sealing device, which is used for sealing a wellhead device of an oil pumping well and characterized in that: a sealing steel ring, a telescopic hose, a hold clamp assembly and an oil pumping rod are arranged, wherein the telescopic hose is connected with the lower end of the sealing steel ring; the middle of the telescopic hose is provided with the oil pumping rod; the hold clamp assembly is arranged below the telescopic hose and sleeved on the pumping rod; the sealing steel ring is arranged above the wellhead deviceand in sealed connection with the wellhead device; other components are hung below the wellhead device and in an oil pipe. The non-smooth flexible rope corrugated pipe wellhead sealing device changesthe dynamic seal of a conventional packing box into static seal, radically realizes zero friction, zero leakage, energy conversation and consumption reduction, and no pollution, has rational and stable structure, has strong applicability, convenience and reliability due to diversification of arrangement and implementation schemes, can be used for sealing a polished rod and a flexible pumping rod,and has long service life without maintenance.

Description

technical field [0001] The invention relates to the technical field of mechanical oil recovery, in particular to a non-smooth surface flexible rope bellows wellhead sealing device without friction and leakage. Background technique [0002] At present, the energy loss in the downhole part of the rod pump is mainly in the packing box, sucker rod and oil well pump. The energy loss of the existing conventional packing box is mainly friction loss and leakage loss. Most conventional packing boxes are sealed with soft packing. By rotating the gland of the packing box, the filler of the packing box and the polished rod are in a tightly compressed state. The sealing form is a contact seal, and the contact force of the contact seal makes the polished rod and the packing box The filler in the contact creates friction. Generally speaking, this kind of friction increases with the increase of working pressure, compression amount and contact area, etc., and decreases with the increase of ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a non-smooth flexible rope bellows wellhead sealing device that solves the problems of existing packing boxes such as large frictional resistance, large leakage, high energy consumption, and frequent maintenance.

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