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. 23, 2013
Filed:
May. 27, 2011
Frank Benjamin Springett, Spring, TX (US);
Christopher Dale Johnson, Cypress, TX (US);
Shern Eugene Peters, Houston, TX (US);
Eric Trevor Ensley, Cypress, TX (US);
James Brugman, Spring, TX (US);
Frank Benjamin Springett, Spring, TX (US);
Christopher Dale Johnson, Cypress, TX (US);
Shern Eugene Peters, Houston, TX (US);
Eric Trevor Ensley, Cypress, TX (US);
James Brugman, Spring, TX (US);
National Oilwell Varco, L.P., Houston, TX (US);
Abstract
The invention relates to techniques for severing a tubular. A blowout preventer is provided with a housing having a bore therethrough for receiving the tubular, an actuator positionable in the housing, and a plurality of cutting tools positionable in the housing and selectively movable into an actuated position with the actuator. Each of the cutting tools have a base supportable by the actuator and selectively movable thereby, and a cutting head supported by the base. The cutting head comprising a tip having a piecing point at an end thereof and at least one cutting surface. The piercing point pierces the tubular and the cutting surfaces taper away from the piercing point for cutting through the tubular whereby the cutting head passes through tubular.