Novel anti-corrosion alloy smoothsucker rod

Abstract

The invention discloses a novel anti-corrosion alloy smooth sucker rod, which is manufactured according to the following steps of: selecting 30CrMo (or various kinds of high-quality chrome molybdenum alloy steel) as materials for a rod body; performing deoiling at a temperature being 40 to 60 DEG C, performing scrubbing for 10 minutes and using deoiling agents; performing water washing at a room temperature for 1 minute; using hydrochloric acid or sulfuric acid for rust removal at the room temperature until the rust is thoroughly removed; performing water washing at the room temperature until the rod body is clean; performing neutralization by a trace amount of alkali for 5 minutes until no acid is remained on the rod body; washing the rod body by clean water at the room temperature for 1 minute until no acid or alkali is remained; using chromiumtrioxide or sulfuric acid or additives for chromium plating, performing the chromium plating at 50 to 55 DEG C, stabilizing the current intensity at 30 to 50 A / dm<2>, enabling the rod body to slowly rotate, and determining the time according to the thickness requirement of a chromium plating layer; flushing plating workpiece liquor by clean water at the room temperature until the rod body is cleanly flushed; naturally drying the rod body at the room temperature; performing heating dehydrogenation for two hours in a furnace at 190 to 220 DEG C; and performing finished product protection and smearing anti-rust oil on a surface layer. The novel anti-corrosion alloy smooth sucker rod has the beneficial effect that a smooth sucker rod with the advantages of good anti-corrosion performance, good mechanical performance and good surface wear-resistant performance is provided.

Description

technical field [0001] The invention belongs to the technical field of oil production equipment and relates to a novel corrosion-resistant alloy sucker rod polished rod. Background technique [0002] The polished sucker rod is the key component connecting the pumping unit and the downhole sucker rod. Combining the characteristics of Daqing Oilfield users’ use and maintenance, our company has successively produced two types of polished sucker rods (φ28, φ38) to ensure oilfield production achieved better results. However, with the development and application of ASP flooding in oilfields (ASP ASP flooding refers to the composite flooding system composed of alkali / surfactant / polymer), due to the complex composition of polymer flooding fluid and ASP flooding fluid , containing a large amount of corrosive chemical components, the shortest time from the replacement of ordinary polished rods to the occurrence of corrosion pits, peeling and other corrosion phenomena is only a few da...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a new type of corrosion-resistant alloy sucker rod polished rod, which solves the problems that the current sucker rod has poor corrosion resistance to alkali, consumes a lot of sucker rods, and has low work efficiency and utilization rate

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