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Preparation process for metal matrix material for petroleum sleeve

A technology of metal matrix and oil casing, applied in the direction of casing, manufacturing tools, drilling pipes, etc., can solve the problem that alloy materials cannot meet the cost and strength at the same time, and achieve the effect of low raw material cost and production cost and high strength

Inactive Publication Date: 2016-10-12
SICHUAN XINGZHI ZHIHUI INTPROP OPERATION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the existing alloy materials cannot meet the problems of cost and strength at the same time, and the preparation process of the metal matrix material for oil casing is provided to solve the above problems

Method used

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  • Preparation process for metal matrix material for petroleum sleeve
  • Preparation process for metal matrix material for petroleum sleeve

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Embodiment

[0020] The preparation process of metal matrix material for oil casing pipe includes:

[0021] Step 1. Put the pig iron into the furnace and melt it as an iron matrix, and undergo desulfurization, deoxidation, and dephosphorization treatments to make the sulfur content in the pig iron less than 0.02% and the phosphorus content less than 0.03%;

[0022] Step 2: After adding Mn, Cu, N to the iron matrix and mixing uniformly, heat to a molten state and keep it for 1 to 2 hours, then add Si, Cr, and C to mix uniformly, and keep it at 800-1100℃ for at least 2h After that, increase the temperature to 1200-1250℃ at a heating rate of 5-10℃ / min, keep it for at least 2h, and then cast at a constant temperature at 800-850℃;

[0023] Step 3. After the casting is completed, reduce the temperature to 400-450°C at a rate of 5-10°C / min, and then quickly cool to below 200°C; the rapid cooling rate is greater than 100°C / min;

[0024] Step 4: After cooling, put it into a furnace fire at 800-850°C for 1 ...

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Abstract

The invention discloses a preparation process for a metal matrix material for a petroleum sleeve, and the preparation process solves the problem that a current alloy material cannot simultaneously meet cost requirements and strength requirements. The preparation process comprises the following steps: step I, adding pig iron into a furnace to melt as an iron substrate, and carrying out desulfuration treatment, deoxidization treatment and dephosphorization treatment on the iron susbtrate for enabling sulfur content to be lower than 0.02% and phosphor content to be lower than 0.03% in the pig iron; step II, adding Mn, Cu and N into the iron matrix to uniformly mix to obtain a mixture, heating the mixture to a molten state, keeping the molten-state mixture for 1-2 hours, then, adding Si, Cr and C into the mixture to uniformly mix, preserving the heat for at least two hours at a temperature being 800-1100 DEG C, rising the temperature to 1200-1250 DEG C with a temperature rising rate being 5-10 DEG C / min, preserving the heat for at least two hours, and carrying out constant-temperature casting at a temperature being 800-850 DEG C; step III, reducing the temperature and quickly cooling to a temperature lower than 200 DEG C after casting; and step IV, preserving the heat after cooling, and finally quenching and tempering to prepare a finished product. In case of guaranteeing low cost, high strength and high hardness are guaranteed, so that acid etching resistance can be effectively improved.

Description

Technical field [0001] The invention relates to a process for preparing metal materials, in particular to a process for preparing metal matrix materials for petroleum casing pipes. Background technique [0002] Petroleum casing is a steel pipe used to support the walls of oil and gas wells to ensure the normal operation of the entire oil well after drilling and completion. Each well requires several layers of casing according to different drilling depths and geological conditions. Cement is used to cement the casing after the casing is down. It is different from tubing and drill pipe and cannot be reused. It is a disposable material. Therefore, casing consumption accounts for more than 70% of all oil well pipes. Casings can be divided into pipes, surface casings, technical casings and oil casings according to their usage. [0003] Oil casing is the lifeline to maintain the operation of oil wells. Due to the different geological conditions, the downhole stress state is complex, ...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C22C38/16C22C38/18C22C33/04C21D1/18C21D9/08E21B17/00
CPCC21D1/18C21D9/08C22C33/04C22C38/001C22C38/02C22C38/04C22C38/16C22C38/18E21B17/00
Inventor 贺昶明
Owner SICHUAN XINGZHI ZHIHUI INTPROP OPERATION CO LTD
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