05293946 is referenced by 22 patents and cites 6 patents.

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.

Title
Divergent fluid nozzle for drilling tool
Application Number
7/945392
Publication Number
5293946
Application Date
September 16, 1992
Publication Date
March 15, 1994
Inventor
Bernard Ponineau
Pau
FR
Alain Besson
Sartrouville
FR
Agent
Sughrue Mion Zinn Macpeak and Seas
Assignee
Diamant Boart Stratabit
BE
Total
FR
IPC
E21B 10/18
View Original Source