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. 13, 2004
Filed:
Jul. 08, 2002
Christopher D. Johnson, Cypress, TX (US);
Tri Canh Le, Spring, TX (US);
George W. Tisdale, Spring, TX (US);
Esteban Palomo, Jr., Houston, TX (US);
Varco Shaffer, Inc., Houston, TX (US);
Abstract
The shear ram assembly for shearing an oil well tubular T includes a first ram axially moveable along the first axis for moving an upper blade , and an opposing second ram axially moveable along the second ram axis for moving a lower blade . An upper planar surface of the lower blade passes closely adjacent a lower planar surface of the upper blade as the blades move towards each other to shear the tubular. The sealing system is positioned within a recess in the upper surface of the lower blade, and includes an elastomeric seal for sealing engagement with the lower planar surface of the upper blade and a rigid actuator moveable relative to the lower blade to energize the elastomeric seal.