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Sucker rod in super II level

A sucker rod and steel technology, applied in drill pipes, heat treatment process control, heat treatment equipment, etc., can solve the problems of low reliability, unattainable fatigue strength, unable to meet the requirements of sucker rod manufacturing, etc., and reduce the load of rod string. , the effect of reducing power consumption

Inactive Publication Date: 2007-05-09
ANTON OILFIELD SERVICES (GRP) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, 20CrMo steel is mostly used in the production of sucker rods, and H-grade sucker rods are manufactured by increasing the strength through heat treatment. Fully meet production needs
At present, although there are some super-strength alloy structural steels that can reach the level of tensile strength exceeding Class H, their fatigue strength cannot meet the requirements of the petroleum industry and cannot meet the requirements for the manufacture of sucker rods.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, a super H-grade sucker rod, the weight percentage of each chemical composition in the steel is: carbon 0.07%, silicon 0.40%, manganese 1.60%, chromium 0.60%, molybdenum 0.20%, nickel 0.3%, copper 0.20% %, phosphorus 0.025%, sulfur 0.25%, and the balance is iron.

[0021] The manufacture method of super H grade sucker rod of the present invention comprises the following steps:

[0022] 1. Preparation of steel for super H-grade sucker rods: The raw materials obtained according to the above formula are smelted in an electric furnace, and the molten steel is poured into a 560kg steel ingot. Rolled into 65mm×65mm by Φ650X1 and Φ650X3 rolling mills 2 After the square billet is made, the Φ400X1 and Φ250X5 continuous rolling mills adopt the controlled rolling and controlled cooling process: the heating temperature is 1090°C, the final rolling temperature is 900°C, and the cooling rate is 3°C / s to roll the billet into Φ28 round steel, which is cut into 7m feet, a...

Embodiment 2

[0026] Embodiment 2, a super H-grade sucker rod, the weight percentage of each chemical composition in the steel is: carbon 0.13%, silicon 1.20%, manganese 2.2%, chromium 1.70%, molybdenum 0.40%, nickel 0.3%, copper 0.20% %, phosphorus 0.025%, sulfur 0.25%, and the balance is iron. The manufacturing method of the super H-class sucker rod of the present invention is the same as that of the first embodiment.

Embodiment 3

[0027] Embodiment 3, a super H-grade sucker rod, the weight percentage of each chemical composition in the steel is: carbon 0.08%, silicon 0.50%, manganese 1.70%, chromium 0.90%, molybdenum 0.25%, nickel 0.2%, copper 0.15% %, phosphorus 0.02%, sulfur 0.20%, and the balance is iron. The manufacturing method of the super H-class sucker rod of the present invention is the same as that of the first embodiment.

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Abstract

The present invention relates to a super-H-grade pumping rod. The chemical components of steel material for making said pumping rod include (by wt%) 0.07%-0.13% of carbon, 0.40%-1.20% of silicone, 1.60%-2.2% of manganese, 0.60%-1.70% of chrome, 0.20%-0.40% of molybdenum, nickel content is less than or equal to 0.3%, copper content is less than or equal to 0.20%, phosphorus content is less than or equal to 0.025%, sulfur content is less than or equal to 0.25% and the rest is iron. Said pumping rod successively is undergone the processes of quenching treatment and tempering treatment, its quenching temperature is 900 deg.C-950 deg.C, heat-insulating for 1 hr, then making tempering treatment, tempering temperature is 330 deg.C-370 deg.C, heat-insulating for 2 hr, then air cooling.

Description

technical field [0001] The invention belongs to the field of petroleum equipment, and in particular relates to a super H-class sucker rod. Background technique [0002] In the petroleum industry, pumping unit and rod pump oil production is an artificial lift oil production method, which is widely used in various oil fields at home and abroad for its advantages of simple equipment, low investment, convenient management, and strong adaptability. The pumping unit, the sucker rod and the pump are the three main components of the rod pump oil production equipment. The sucker rod is an important link that transmits the power of the pumping unit to the downhole pump. It is essentially a special long Reciprocating pump tie rods, coupled with alternating loads under varying degrees of corrosion, are extremely unfavorable to the working conditions of sucker rods. Therefore, selecting the steel material most suitable for the working conditions of the sucker rod for the manufacture of ...

Claims

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Application Information

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IPC IPC(8): E21B17/00C22C38/22C22C38/44C21D1/18C21D11/00
Inventor 黄锦滨吴振宁于海徐伟乔国发
Owner ANTON OILFIELD SERVICES (GRP) LTD
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