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:
Dec. 17, 1996
Filed:
Apr. 28, 1995
Applicant:
Inventor:
Malcolm G Coone, Katy, TX (US);
Assignee:
Davis-Lynch, Inc., Pearland, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166387 ; 166187 ;
Abstract
A method and apparths for filling and circulating drilling fluid in a wellbore during casing running operations is disclosed. A fill/circulate tool is placed partially within the upper end of a casing string so that fluid may be pumped into the interior of the casing string. The tool has a self energizing seal element which engages the interior wall of the casing string when the tool is fully lowered therein, said seal element being energized by the pressure of the fluid in the casing string so that fluid pumped into the casing string through the tool is circulated through the casing string and explled from the lower end of the casing string.