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:
Apr. 16, 1996
Filed:
Sep. 03, 1993
Applicant:
Inventor:
Keith C Mott, Houston, TX (US);
Assignee:
Hydril Company, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ;
U.S. Cl.
CPC ...
251 58 ; 166319 ; 175218 ; 251 62 ;
Abstract
A remotely operated actuator for a drill string internal blowout preventer is disclosed. It includes an annular cylinder for mounting on the preventer housing to rotate with the housing and the kelly. An annular piston in the cylinder moves a link pivotally connected to the piston and a crank arm to open and close the preventer.