Preparation method of P110-grade expansion tube for exploiting petroleum and gas

A technology for oil and natural gas and expansion pipes, which is applied to drill pipes, casings, drilling equipment, etc., can solve problems such as being unfavorable to the popularization and development of P110 high-grade steel expansion pipe technology, high alloy cost, and raising the cost of expansion pipe drilling technology.

Inactive Publication Date: 2012-07-04
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alloy cost of the above-mentioned patented raw materials is high, which increases the cost of expansion tube drillin

Method used

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  • Preparation method of P110-grade expansion tube for exploiting petroleum and gas
  • Preparation method of P110-grade expansion tube for exploiting petroleum and gas
  • Preparation method of P110-grade expansion tube for exploiting petroleum and gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The chemical composition weight percentage of selected raw material steel is as follows:

[0070] C: 0.15wt%~0.25wt%; Mn: 1.5wt%~2.0%; Si: 1.0wt%~1.5wt%; Al: 0.3wt%~1.0wt%; Nb: 0.05wt%~0.1wt%; Ti : 0.01wt%~0.02wt%; S: 0wt%~0.01wt%; P: 0wt%~0.015wt%.

[0071] The preferred ingredients are: C: 0.18wt%~0.25wt%, Mn: 1.5wt%~2.0wt%, Si: 1.0wt%~1.5wt%, Al: 0.3wt%~1.0wt%, Nb: 0.1wt% , Ti: 0.02wt%, S: 0.0075wt%, P: 0.0060wt%, the balance is Fe and unavoidable impurities.

[0072] The preferred production steps are as follows:

[0073] 1) Casting and rolling alloy plates according to the composition of the expansion tube described in the above technical solution;

[0074] 2) Coil the alloy plate, and then weld it to form an expansion tube;

[0075] 3) Put the expansion tube into a resistance heating furnace for normalizing treatment, heat it to the set temperature at a heating rate of 5°C / s and hold it for a sufficient time to make it completely austenitized, and then use onl...

Embodiment 2

[0080] Select the preferred composition of the chemical composition of raw material steel with embodiment 1:

[0081] The preferred production steps are as follows:

[0082] 1) Casting and rolling alloy plates according to the composition of the expansion tube described in the above technical solution;

[0083] 2) Coil the alloy plate, and then weld it to form an expansion tube;

[0084] 3) Put the expansion tube into a resistance heating furnace for normalizing treatment, heat it to the set temperature at a heating rate of 5°C / s and hold it for a sufficient time to make it completely austenitized, and then use online spray quenching The expansion tube is quickly quenched into normal temperature water (cooling rate is about 60°C / s) to room temperature, so that the tube can be completely martensitic (complete quenching process);

[0085] 4) Put the quenched expansion tube in the resistance heating furnace again, heat it to the sub-temperature zone (two-phase zone) of 760~780 ...

Embodiment 3

[0089] Select the preferred composition of the chemical composition of raw material steel with embodiment 1:

[0090] The preferred production steps are as follows:

[0091] 1) Casting and rolling alloy plates according to the composition of the expansion tube described in the above technical solution;

[0092] 2) Coil the alloy plate, and then weld it to form an expansion tube;

[0093] 3) Put the expansion tube into a resistance heating furnace for normalizing treatment, heat it to the set temperature at a heating rate of 5°C / s and hold it for a sufficient time to make it completely austenitized, and then use online spray quenching The expansion tube is quickly quenched into normal temperature water (cooling rate is about 60°C / s) to room temperature, so that the tube can be completely martensitic (complete quenching process);

[0094] 4) Put the quenched expansion tube in the resistance heating furnace again, heat it to the sub-temperature zone (two-phase zone) of 760~780 ...

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Abstract

The invention relates to a preparation method of a P110-grade expansion tube for exploiting petroleum and gas. The expansion tube comprises the following chemical components by mass percentage: 0.10-0.30 of C, 0.70-2.0 of Mn, 0.3-1.5 of Si, 0-1.0 of Al, 0.02-0.1 of Nb, 0-0.02 of Ti and the balance of Fe and inevitable impurities. The preparation method comprises the following steps of: after performing smelting and rolling to obtain a related alloy plate, performing plate rolling to the alloy plate and welding to prepare the expansion tube, and finally, performing complete austenitizing and then carrying out heat treatment process of quenching and subsequent subtemperature tempering-quenching-partitioning to enable an expansion tube to reach expected strength criterion and plastic deformation ability and ensure the mechanical property of the tube after and before tube expansion to meet provisions of API (American Petroleum Institute) and other relevant standards. Test results show that the P110 steel grade multiphase expansion tube with high uniformity extension has high strength, plasticity, toughness and elongation rate, and has comprehensive mechanical property superior to the conventional quenching-tempering steel, trip steel and Q-P (quenching--partitioning) steel.

Description

technical field [0001] The invention belongs to the field of iron and steel materials, and in particular relates to a method for preparing a P110 grade expansion pipe for oil and gas development. Background technique [0002] In recent years, with the vigorous development of the oil drilling and production industry, related exploration and development have expanded to complex fields such as offshore operations and land ultra-deep well operations. increase. In these fields, the traditional oil and gas well operation methods are severely limited, the reason is that the original technical casing is composed of casings of various sizes, and its wellbore structure is conical with a large top and a small bottom , with the increase of the well depth, the layers of casing run into the wellbore are also increasing, so that the diameter of the available wellbore becomes smaller and smaller, which greatly increases the cost of drilling. In deep and ultra-deep well drilling, the wellbo...

Claims

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Application Information

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IPC IPC(8): C22C38/14C21D8/10E21B17/01
Inventor 尚成嘉任勇强谢振家贺飞汤忖江郭晖
Owner UNIV OF SCI & TECH BEIJING
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