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Oil pumping rod steel and proces for producing super high strength oil pumping rod

An ultra-high-strength, sucker-rod steel technology is used in the manufacture of ultra-high-strength sucker-rods and iron-based alloy sucker-rod steels for oil production in deep oil wells, which can solve the problem of long sucker-rod production process, unstable product quality, etc. The problem of high manufacturing cost, to achieve the effect of good comprehensive mechanical properties, novel and reasonable process method, stable and reliable quality

Inactive Publication Date: 2005-03-02
刘岩
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AI Technical Summary

Problems solved by technology

The existing problems in the background technology are: since the oil pumping steel is made of two different alloy steels, which are welded together by friction, high-frequency treatment must be carried out after the intermediate frequency treatment, which makes the whole sucker rod production process long, cumbersome and difficult to produce. Unstable quality and high manufacturing costs

Method used

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Embodiment Construction

[0017] Below by embodiment, the present invention will be further described.

[0018] In an embodiment, the content of each component of the sucker rod steel is: (percentage by weight)

[0019] C: 0.27% Si: 0.30% Mn: 0.50% Cr: 0.90% Mo: 0.20% and the rest is Fe. Other smelting processes of sucker rod steel are the same as ordinary iron-based alloy sucker rod steel.

[0020] The process of manufacturing ultra-high-strength sucker rods is: use the above-mentioned sucker rod steel to make the sucker rod, the rod head and the rod body are integrated, no friction welding is required, only intermediate frequency quenching and high temperature tempering are performed on the sucker rod, no High-frequency quenching is required, and finally shot blasting is performed to manufacture ultra-high-strength sucker rods. The tensile strength of the produced sucker rods can reach more than 980Mpa.

[0021] The process parameters for intermediate frequency quenching of sucker rods are as follo...

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Abstract

The present invention relates to steel for super high strength oil pumping rod and its making process. The steel for super high strength oil pumping rod has the components including C 0.25-0.30 wt%, Si 0.20-0.40 wt%, Mn 0.40-0.70 wt%, Cr 0.80-1.10 wt% and Mo 0.15-0.25 wt%, except Fe. The making process of the super high strength oil pumping rod includes: making integral rod head and rod body, medium frequency quenching, high temperature tempering and final rotoblasting treatment. The making process is simple and low in production cost, and the produced oil pumping rod has stable and reliable quality, super high strength including tensile strength up to 980 MPa, and high comprehensive performance. The present invention can meet the requirement of deep well oil production completely.

Description

Technical field: [0001] The invention relates to a sucker rod steel and a process for manufacturing an ultra-high-strength sucker rod, in particular to an iron-based alloy sucker rod steel and a process for using the sucker rod steel to manufacture an ultra-high-strength sucker rod for oil production in deep wells . Background technique: [0002] At present, the high-strength sucker rod steel used for oil production in deep oil wells is generally 20CrMo or 35CrMo and other alloy steels. The manufacturing process of high-strength sucker rods is: use two different alloy steels to make the rod head and rod body respectively, and form an integral structure through friction welding sucker rod, and then carry out intermediate frequency quenching and high temperature tempering on the whole sucker rod first, then carry out high-frequency quenching on the whole sucker rod, and finally carry out shot blasting to manufacture high-strength sucker rod; for example, the Chinese patent ZL9...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C22C38/22
Inventor 刘岩
Owner 刘岩
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