Self-righting abrasion-proof hollow sucker rod

Abstract

The invention discloses a self-righting abrasion-proof hollow sucker rod which comprises a hollow sucker rod body. A centralizer and an abrasion-proof device are arranged on the inner sides of tube rod joints at two ends of the sucker rod body respectively, the distance between the centralizer and the abrasion-proof device is longer than 2 meters, and both the centralizer and the abrasion-proof device can freely rotate on the sucker rod body. The freely rotatable centralizer and the freely rotatable abrasion-proof device are arranged on the rod body, so that fine righting effect can be achieved, accuracy is high, eccentric abrasion is decreased when oil is sucked, the stop frequency caused by the eccentric abrasion is reduced, the service life of the hollow sucker rod is greatly prolonged, and operation cycle is prolonged, so that oil production cost is reduced. The self-righting abrasion-proof hollow sucker rod has the advantages of reasonable structure, reliability in sealing, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of hollow sucker rods, in particular to a self-supporting formal wear-resistant hollow sucker rod. Background technique [0002] At present, oil extraction, heavy oil, high wax content and other hard-to-recover oil reservoirs require the use of hollow sucker rods. The traditional hollow sucker rod injects heat carrier (hot oil, hot water, hot gas), chemicals or cables into the oil well through the central hole of the rod body to heat to achieve viscosity reduction and wax melting, thereby improving the fluidity of crude oil and improving production efficiency . Since the hollow sucker rod is continuously moved up and down in the oil well through the oil well pump, the crude oil in the well is sent to the ground. In this position, when the sucker rods move against each other on the inner wall of the tubing, the sucker rods will be damaged and broken when they rub against each other, and the water cut in...

AI Technical Summary

Problems solved by technology

Since the hollow sucker rod is continuously moved up and down in the oil well through the oil well pump, the crude oil in the well is sent to the ground. position, when the sucker rods move on the inner wall of the tubing, they will be damaged and broken if they rub against each other, and the water cut in the current oil well will increase, and the eccentric wear of the pipe and rod will increase, which will affect the production of the oil well.

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