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:
Aug. 12, 2008
Filed:
Nov. 20, 2006
John Edward Ravensbergen, DeWinton, CA;
Doug Brunskill, Calgary, CA;
John Edward Ravensbergen, DeWinton, CA;
Doug Brunskill, Calgary, CA;
BJ Services Company, Houston, TX (US);
Abstract
An improved dual purpose blow out preventer ('BOP') that provides both deployment and wellhead pressure containment functions. The dual purpose BOP may include four sets of rams including a set of seal/slip rams that provide bi-directional sealing being a first barrier to downhole pressure. The seal/slip rams may also grip a portion of a bottom hole assembly and create the bottom seal of an annular chamber. The BOP may include a set of seal rams that create the top seal of the annular chamber. The annular chamber may be pressurized through a port in the BOP, which may actuate a coiled tubing connector. The BOP may include a set of locate rams used to position a coiled tubing connector within the BOP stack. The BOP may also include a set of blind/shear rams that provide bi-directional sealing being a second barrier to wellhead pressure.