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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9988857 B1

PDFFull Text
Date of Patent:
Jun. 05, 2018

Filed:

Oct. 09, 2013

Method for manufacturing superior 13cr friction-welded drillrod

Applicant:

Baoshan Iron & Steel Co., Ltd., Shanghai, CN;

Inventors:

Peng Zhao, Shanghai, CN;

Jie Yu, Shanghai, CN;

Changfu Dong, Shanghai, CN;

Assignee:

Baoshan Iron & Steel Co., Ltd., Shanghai, CN;

Attorney:

Quarles & Brady LLP

Primary Examiner:

John C Hong

Int. Cl.
CPC ...
E21B 17/042 (2006.01); F16L 15/00 (2006.01); C21D 6/00 (2006.01); B23K 20/12 (2006.01); C22C 38/44 (2006.01); E21B 17/00 (2006.01); C21D 9/50 (2006.01); C21D 1/30 (2006.01); C21D 1/58 (2006.01); C21D 9/08 (2006.01); C21D 9/14 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); F16L 13/02 (2006.01); C21D 9/22 (2006.01);
U.S. Cl.
CPC ...
E21B 17/042 (2013.01); B23K 20/12 (2013.01); B23K 20/129 (2013.01); C21D 1/30 (2013.01); C21D 1/58 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 9/085 (2013.01); C21D 9/14 (2013.01); C21D 9/50 (2013.01); C21D 9/505 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/44 (2013.01); E21B 17/00 (2013.01); F16L 13/02 (2013.01); F16L 15/00 (2013.01); C21D 6/002 (2013.01); C21D 9/22 (2013.01);
Abstract

The present invention provides a method for manufacturing a superior 13Cr friction-welded drillrod, the method comprising the following steps: manufacturing a superior 13Cr tube body; manufacturing a superior 13Cr internally threaded coupler and a superior 13Cr externally threaded coupler, respectively; connecting the superior 13Cr internally threaded coupler and the superior 13Cr externally threaded coupler respectively to the two ends of the superior 13Cr tube body by means of frictional butt welding; after heating seam areas to 950° C.-1000° C., cooling same to below 200° C. by ejecting compressed air onto the surfaces of the seam areas, and then cooling the seam areas to room temperature by spraying water; and tempering the seam areas by heating same to 640° C.-700° C. By the present method, a superior 13Cr friction-welded drillrod can be manufactured, which, in the case of the exploration of a gas filed containing a relatively high level of CO2, can be not only used as a drillrod in an earlier stage of nitrogen well-drilling operation, but also used as an oil tube in a later stage of well completion with oil tube.

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Zhao, Peng. (2018). Method for manufacturing superior 13cr friction-welded drillrod (U.S. Patent No. 9988857). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9988857

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