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Drill collar resistant to hydrogen sulfide corrosion

An anti-hydrogen sulfide and drill collar technology, applied in drill pipe, drill pipe, earth-moving drilling, etc., can solve the problems of inability to meet anti-corrosion performance requirements, huge economic losses, casualties, etc. Cost saving and high hardness

Pending Publication Date: 2021-03-30
DONGYING WEIMA PETROLEUM DRILLING TOOLS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For corrosive formations, the conventional API standard production of drilling tools can no longer meet the anti-corrosion performance requirements, and quality accidents such as fracture failures are prone to occur during the drilling process, resulting in casualties, huge economic losses, etc.

Method used

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  • Drill collar resistant to hydrogen sulfide corrosion

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing.

[0017] A drill collar resistant to hydrogen sulfide corrosion, comprising a body 1, an internal thread 2, an external thread 3 and an elevator groove 4, one end of the body 1 is provided with an internal thread 2, and the other end of the body 1 is provided with an external thread 3. An elevator slot 4 is provided at the end of the body 1 away from the external thread 3 .

[0018] Described elevator groove 4 is 0.5 meters apart from the end face of internal thread 2.

[0019] The yield strength of the drill collar is 758-862MPa, the tensile strength is 862-1000MPa, the elongation is ≥15%, the impact energy is ≥90J, the average hardness value is HRC≤30, and the single maximum hardness value is HRC≤32.

[0020] Mo can be dissolved in ferrite, austenite and carbide in steel. It is an element that shrinks the austenite phase zone. When the content of molybdenum is low, it will...

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Abstract

The invention provides a drill collar resistant to hydrogen sulfide corrosion. One end of a body is provided with an internal thread, the other end of the body is provided with an external thread, andthe end, away from the external thread, of the body is provided with an elevator groove. The drill collar has the advantages of being high in strength, high in hardness and resistant to corrosion, ensuring the safety of operators, saving the cost, solving the anti-corrosion problem of steel for a drilling tool in a hydrogen-sulfide-containing area environment, and avoiding the drilling tool breakage accident caused by hydrogen sulfide corrosion.

Description

technical field [0001] The invention relates to the field of drill collars, in particular to a drill collar resistant to hydrogen sulfide corrosion. Background technique [0002] Petroleum is the blood of industry and the pillar energy necessary for economic development. The sustainable development of our country's oil extraction is related to the national energy security and the healthy operation of the whole society. However, petroleum is a non-renewable and limited resource. With the pace of industrial development, oil extraction has gradually entered into harsh working conditions such as deep wells, ultra-deep wells, and corrosive formations. For corrosive formations, conventional API-standard drilling tools can no longer meet the anti-corrosion performance requirements, and quality accidents such as fracture failures are prone to occur during drilling, resulting in casualties and huge economic losses. Contents of the invention [0003] The object of the present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C21D1/18E21B17/16
CPCC22C38/02C22C38/04C22C38/20C22C38/22C22C38/24C22C38/26C22C38/28C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C21D1/18E21B17/16
Inventor 张献才许新波张宇张明明邱帅李绪通李永毕文峰邱晴
Owner DONGYING WEIMA PETROLEUM DRILLING TOOLS