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.:
Date of Patent:
Jan. 22, 2019
Filed:
Nov. 05, 2015
China National Petroleum Corporation, Beijing, CN;
Cnpc Tubular Goods Research Institute, Xi an, Shan Xi, CN;
CHINA NATIONAL PETROLEUM CORPORATION, Beijing, CN;
CNPC TUBULAR GOODS RESEARCH INSTITUTE, Xi An, CN;
Abstract
A connection structure between a pipe body and a joint of an aluminum alloy drill pipe comprises a first joint portion located at an end of the aluminum alloy pipe body and a second joint portion, wherein the first joint portion comprises an external cone section, an external threaded section and a first seal end face sequentially provided from inside to outside thereof, and a taper of the external cone section is smaller than that of the external threaded section; wherein the second joint portion is cylindrical and comprises an internal cone section fitted with the external cone section, an internal threaded section fitted with the external threaded section, a second seal end face, an elevator shoulder face, and a concave arc transition section between the internal cone section and the internal threaded section.