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:
May. 14, 1991
Filed:
Jul. 25, 1988
George B Geary, Houston, TX (US);
Other;
Abstract
Threaded oil well pipe joint comprising a coupling having internally threaded ends and an intermediate unthreaded area with substantially greater cross section area. The internally threaded ends are made up with externally threaded ends of pipe. Stresses resulting from joining either end of the coupling to a pipe section are absorbed by the intermediate area so that such stresses will not affect the opposing end of the coupling. Because the stresses during makeup of one end do not affect the other end of the coupling, the overall stress levels, pootential for thread damage and leakage are reduced in the joint. As a result, the outside diameter of the coupling may be significantly reduced so that the joint can be run more easily in a restricted diameter well bore.