Alloy steel seamless steel tube for geological drilling and machining method thereof

A technology of seamless steel pipe and geological drilling, applied in the field of seamless steel pipe, can solve the problems of separation layer and surface decarburization, poor impact toughness, poor dimensional accuracy of hot-rolled steel pipe, etc., and achieve high rotational deformation resistance and wear resistance, The effect of good low temperature impact toughness and sufficient safety margin
CN102953019AInactive Publication Date: 2013-03-06无锡润丰特种钢管有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
无锡润丰特种钢管有限公司
Publication Date
2013-03-06
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention relates to an alloy steel seamless steel tube for geological drilling and a machining method of the alloy steel seamless steel tube. The alloy steel seamless steel tube manufactured by the method disclosed by the invention is good in comprehensive properties, good in low-temperature impact toughness, and higher in rotational deformation resistance and abrasive resistance, wherein the yield strength of the alloy steel seamless steel tube is more than 1000MPa. After the cold-drawing technology, the thermal treatment technology and the straightening technology are adopted, the mechanical property, the rotational deformation resistance, the low-temperature impact toughness and the abrasive resistance of the seamless steel tube body can reach the standard.
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Description

technical field

[0001] The invention relates to a seamless steel pipe, in particular to an alloy steel seamless steel pipe for geological drilling and a processing method thereof. Background technique

[0002] Seamless steel pipes are used for geological exploration or drilling operations. At present, the yield strength, dimensional deviation and low-temperature impact of the highest steel grade specified in the current domestic standards cannot meet the requirements of actual exploration, making geological drilling useless in my country. Seam steel pipes can only rely on imports, and the difficulty in manufacturing such seamless steel pipes lies in:

[0003] (1) The strength caused by the deviation of the chemical composition of the material and the harmful elements cannot be improved, the impact toughness is poor, and the dimensional accuracy of the hot-rolled steel pipe is poor.

[0004] (2) Ordinary straightening equipment and straightening methods cannot meet the straig...

Claims

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