Reduction spiral spring for tubing paraffin removal of pumping well

Abstract

The invention discloses reduction spiral spring for tubing paraffin removal of a pumping well. The reduction spiral spring for the tubing paraffin removal of the pumping well comprises a body which is spiral springs made of elastic wire materials. The body which is arranged on a pumping rod which is arranged in the pumping well in a matching mode is corresponding to a tubing which is arranged inside the pumping well. The reduction spiral spring for the tubing paraffin removal of the pumping well is characterized in that a small diameter section spiral spring is connected with a large diameter section spiral spring to form into the body; the inner diameter of the small diameter section spiral spring is slightly smaller than the diameter of the pumping rod; and the outer diameter of the large diameter section spiral spring is slightly smaller than the inner diameter of the tubing. Compared with the prior art, the reduction spiral spring has the advantages of being high in rigidity, good in abrasion performance and long in service life due to the facts that the reduction spiral spring is made of elastic wire materials and the surface is covered with chromium coating; preventing blocking of the tubing due to the fact that paraffin coagulated on the tubing is scraped through the large diameter section spiral spring when the reduction spiral springs are performing up-and-down motion along the pumping rod; and being simple in structure and convenient to install and disassemble.

Description

technical field [0001] The invention relates to an accessory of oil exploitation equipment, in particular to a variable-diameter coil spring used for removing wax from oil pipes of pumping wells. Background technique [0002] During oil extraction, when the oil flows from the bottom of the well to the wellhead, the well temperature gradually drops. When it is lower than the wax precipitation point, the wax contained in the crude oil will precipitate and adhere to the tubing, resulting in blockage of the tubing and oil pumping. The rod is easily broken, affecting the normal production of the oil well. In order to prevent oil pipes from waxing, the commonly used treatment methods are: chemical wax removal, hot washing wax removal, mechanical wax removal, etc. Chemical wax removal requires regular injection of chemical agents into the oil well, which is not only costly, but also poor in effect, and often requires hot washing to maintain the normal production of the oil well. ...

AI Technical Summary

Problems solved by technology

Due to the large number of circular wax removers and small oil flow channels, the up and down motion resistance of the sucker rod is large; more importantly, the material used for the circular wax remover has low hardness, poor wear resistance and short service life.

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