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:
Nov. 17, 1987
Filed:
Dec. 15, 1986
Thomas R Bishop, Houston, TX (US);
Wayne A Kovar, Houston, TX (US);
Clyde D Roque, Houston, TX (US);
Bowen Tools, Inc., Houston, TX (US);
Abstract
An apparatus for engaging a tubular member with a tension type spear in which the spear is locked to the tubular member so that it is not released when compressive or other non-tension loads are applied to it. The present invention locks the spear to the tubular member through abutment of a transfer assembly connected to the spear supporting mandrel after the spear has been set within the tubular member. The abutment of the transfer assembly and the tubular member lock the spear within the tubular member under tension so that compressive or other non-tension loads on the supporting pipe string will not affect the grip of the spear.