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Class Information
Number: 175/212
Name: Boring or penetrating the earth > With above-ground means for handling drilling fluid or cutting > Pressurized gas supply
Description: Apparatus including a means to provide a gas at above atmospheric pressure for use in the borehole.

Patents under this class:

Patent Number Title Of Patent Date Issued
8662170 Cuttings transfer system Mar. 4, 2014
8033335 Offshore universal riser system Oct. 11, 2011
8025111 Agitator for a drill and related methods Sep. 27, 2011
7921941 Pressurized fluid flow system for a reverse circulation hammer Apr. 12, 2011
7575073 Separation of evolved gases from drilling fluids in a drilling operation Aug. 18, 2009
7281593 Method for the circulation of gas when drilling or working a well Oct. 16, 2007
7275593 Gripper assembly for downhole tools Oct. 2, 2007
7243741 Separation of evolved gases from drilling fluids in a drilling operation Jul. 17, 2007
7195084 Systems and methods for storing and handling drill cuttings Mar. 27, 2007
6763901 Air delivery system for a direct push drilling swivel Jul. 20, 2004
6668943 Method and apparatus for controlling pressure and detecting well control problems during drilling of an offshore well using a gas-lifted riser Dec. 30, 2003
6637522 Enhanced computer control of in-situ drilling system Oct. 28, 2003
6618966 Fluid lance apparatus Sep. 16, 2003
5944122 Methods and apparatus for controlling an air compressor in a drill string flushing system Aug. 31, 1999
5775442 Recovery of gas from drilling fluid returns in underbalanced drilling Jul. 7, 1998
5435628 Underground hydraulic mining method and apparatus Jul. 25, 1995
5409072 Method and an arrangement for controlling the supply of air into a rock drilling machine Apr. 25, 1995
5330017 Method of processing drilling mud in earth-boring operations Jul. 19, 1994
4867256 Injection of polymer chemicals into drilling mud Sep. 19, 1989
4577700 Method and system for displacing drilling fluid from a drill string in a well drilling system Mar. 25, 1986
4315553 Continuous circulation apparatus for air drilling well bore operations Feb. 16, 1982
4029160 Drilling machine Jun. 14, 1977
3968845 Apparatus and method for geological drilling and coring Jul. 13, 1976
3958650 Drilling system using weight of mud May. 25, 1976

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