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. 05, 1988
Filed:
May. 29, 1985
Philippe C Nobileau, Biot, FR;
Vetco Offshore Industries, Inc., Ventura, CA (US);
Abstract
A conical thread configuration for providing a strong simple and rapid make-up connection of pin and box members particularly for connecting sections of pipes, casings and conductor pipes, anchoring pipes, wellheads and risers, particularly for offshore oil production. Each connecting member has a plurality (n) of thread lead entries on a frusto-conical surface, (n) being at least equal to two and at most equal to AD.times.p.times.1/6.25 in which AD is the average diameter of the frusto-conical surface bearing threads (in inches) and p is the number of threads per inch. The radial dimension of the engaged thread overlap after make-up is smaller than the variation VR of the radius of the frusto-conical surface on one thread pitch and larger than 1/2n of variation VR. Less than one turn is necessary for make-up or disconnection.