Self-rotating paraffin scraping, centralizing and sucking assisting device

Abstract

The invention relates to the field of oil exploitation machinery, and discloses a self-rotating paraffin scraping, centralizing and sucking assisting device. The device comprises a rod body, a coupling, a rotation guiding sliding sleeve, a centralizing sleeve, a pressing cap and balls. A longitudinal zigzag turn-back type closed track is engraved in the middle part of the rod body around the outersurface, the cross section of the zigzag turn-back type closed track is in a concave semicircular arc shape and is matched with the shape of the balls, and the upper vertex and the lower vertex of the zigzag turn-back type closed track are located on the same circumferential line of the rod body correspondingly; and a radial annular protrusion is arranged at the bottom end of the rotation guidingsliding sleeve, spiral flow passing channels are evenly formed in the outer face of the centralizing sleeve, and radial annular circular beads are arranged on the inner wall of the centralizing sleeve. According to the a self-rotating paraffin scraping, centralizing and sucking assisting device, self-rotating uniform grinding, centralizing, sucking assisting and paraffin scraping are organicallycombined, so that multiple functions are realized through one device; the service life is obviously prolonged, the uniform grinding, centralizing and sucking assisting effects are remarkable; and forced and thorough paraffin scraping is carried out on the inner wall of a pipe column, so that the repair-free period of an oil well is comprehensively prolonged.

Description

technical field [0001] The invention relates to the field of petroleum exploitation machinery, in particular to a spin scraping wax righting and pumping aid device. Background technique [0002] In the process of oil extraction, the relative movement between the sucker rod and the oil pipe in different degrees of contact inevitably causes friction and wear between the two. In order to solve this technical problem and optimize the design of the anti-eccentric wear rod column, the inventor has developed a "forced rotation righting and pumping aid device", and applied for a patent in 2006 (application number 200620122344.0) and obtained authorization. In the following ten years of production practice, it was gradually found that this device still has some defects that cannot be ignored. The toggle plate is sliding friction, so the friction resistance is large, the wear is fast, and the service cycle is short; and due to the limitation of the design structure, the design size o...

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Problems solved by technology

After more than ten years of production practice, it was gradually discovered that this device still has some defects that cannot be ignored. For example, the friction between the toothed plate and the dial drives the righting and assisting body to rotate around the rod body forcibly. The toggle plate is a sliding friction, so the friction resistance is large, the wear is fast, and the service life is short; and due to the design structure, the tooth plate is designed to be thin in size, and it is easy to be bumped, brittle, and easily damaged; also due to the design mechanism, The overcurrent opening and closing channel of the pumping aid can only be realized by the meshing of the teeth. The problem is that the sealing surface is doubled, the seal is not tight, the leakage is large, and the pumping aiding effect is poor; also due to the age relationship, at that time (2016 The performance and mechanical parameters of the wear-resistant materials in the past) are far behind the current (2020), resulting in short life of the device and high cost of use; uneven rotation force, unsatisfactory anti-eccentric wear and pumping aid effects

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