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:
Mar. 15, 1994
Filed:
Sep. 16, 1992
Applicant:
Inventors:
Alain Besson, Sartrouville, FR;
Bernard Ponineau, Pau, FR;
Assignees:
Total, Puteaux, FR;
Diamant Boart Stratabit, Brussels, BE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175424 ;
Abstract
A drilling fluid nozzle 12 mounted in the end of an earth drilling tool 10 has a flow channel defined by a surrounding wall 16 which diverges at an angle of 30.degree. or less, such that the exiting fluid 'adheres' to the wall in a laminar manner due to the Coanda effect. This configuration minimizes clogging, and implements ready unclogging.