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:
Oct. 24, 1978
Filed:
Apr. 06, 1977
James B Greer, Houston, TX (US);
Exxon Production Research Company, Houston, TX (US);
Abstract
A high pressure, antigalling, thread interference pipe connection for use with well pipe includes pin and box members, the thread pitch lines of which are curved at the entrance of the box member and at the nose of the pin member so that sharp corners on the threads at the end of one member do not engage the threads of the other mating member and, also, so that pressure due to thread interference is built up in a smooth fashion over several threads rather than as a sharp pressure spike created by the first threads of one member engaging the threads of the other mating member. In addition, the pitch diameters of the threads of the pin and box members are selected so that makeup of the pin and box members occurs only on full height threads.