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:
Jun. 06, 1978
Filed:
Nov. 15, 1976
Martin B Jansen, Jr, Houston, TX (US);
Vetco Offshore Industries, Inc., Ventura, CA (US);
Abstract
A threaded connector for a pipe string, such as a production riser used in connection with sub-aqueous wells, in which the threaded connection between the pin member and box member of the connector is made up initially through an application of relatively low torque to the members, after which the connector has a straight line pretension force of a high tensile value applied to it through use of a suitable tool, the high pretension force being retained between the mating threads of the pin and box members by a preload reaction member threaded on the pin member and rotated into solid engagement with the box member while the pretension force is being applied, to lock the preload in the connector between the threads.