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:
Jun. 05, 2007
Filed:
Oct. 26, 2004
Donald H. Van Steenwyk, San Marino, CA (US);
Raymond W. Teys, Pismo Beach, CA (US);
James R. Higginbotham, The Woodlands, TX (US);
Donald H. Van Steenwyk, San Marino, CA (US);
Raymond W. Teys, Pismo Beach, CA (US);
James R. Higginbotham, The Woodlands, TX (US);
Scientific Drilling International, Houston, TX (US);
Abstract
For use in a wellbore containing a rotary drill string and a drill bit, the combination comprising, a rotary mandrel containing a through opening to pass drilling fluid downwardly from the interior of the drill string, and toward the bit, a non-rotary housing extending about the mandrel, a plenum or plenums in the housing in communication with the interior of the mandrel through an opening to receive fluid pressure used to actuate means associated with drilling activity in the well, and a controlled fluid gap proximate the housing, to slowly leak drilling fluid to the annulus outside the string.