Universal follow-up bias adjusting polished rod sealing mechanism

Abstract

The invention discloses a spherical follow-up universal bias adjusting polished rod sealing mechanism. For the problem that a spherical valve cannot rotate for 360 degrees in operation, the problem of the spherical valve capable of realizing the follow-up sealing along with the oscillation of a polished rod in the sealing operation is solved in a manner of a bulb steering gear on an automobile; and the manner of the bulb steering gear on the automobile is combined with the sealing manner of the spherical valve as a whole, so that the problems of high bias-adjusting quantity without solid wastes, always sealing keeping between a sucker rod and a sealer and universal follow-up movement of the sucker rod and the sealer are solved.

Description

Technical field: [0001] The invention relates to a spherical follow-up universal polarizing rod sealing mechanism used in an oil field pumping unit, which belongs to the well head supporting facilities of the oil field pumping machine. Background technique: [0002] When the oil wells in the oil field have insufficient pressure and cannot self-spray, they need to use oil pumping machinery to pump oil. The used oil pumping equipment of existing oil field oil well all is to be driven polished rod by pumping unit and underground crude oil is pumped into oil pipeline. However, the pressure generated by the polished rod in the process of lifting inevitably makes the crude oil flow out of the wellhead, which wastes crude oil resources and causes pollution around the oil well. The way to solve this problem in the oil field is generally to cut several rubber seals, stagger the cuts, put them into the packing box and press them tightly to seal the polished rod. The disadvantages of...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: 1. After the sealing structure has been used for a period of time, due to the wear of the sealing ring and a certain gap between the polished rods, the sealing effect will be lost, so that the packing will be replaced frequently

2. When the packing is replaced, the rod must stop working. In order to prevent the leakage of crude oil during the replacement, a rubber gate needs to be installed, which is labor-intensive and time-consuming

3. There is no deflection adjustment device on the traditional packing box, and after the polished rod is eccentrically worn, it will also lead to oil drainage at the wellhead

In order to overcome the defects caused by the above methods, people have designed a variety of wellhead polished rod sealing devices with deflection adjustment. However, due to the imperfect design principle and poor field application effect, the polished rod cannot be well sealed, and the wellhead cannot be fully sealed. After the sealing area is adjusted to the deviation, the purpose of eccentric wear and oil leakage will not occur, and the rod still has to stop working when the packing is replaced, and the operation is cumbersome

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