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Class Information
Number: 175/218
Name: Boring or penetrating the earth > With above-ground means for handling drilling fluid or cutting > With valve
Description: Apparatus including valve means to stop or regulate the flow of drilling fluid.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8672042 Continuous fluid circulation valve for well drilling Mar. 18, 2014
8627890 Rotating continuous flow sub Jan. 14, 2014
8590640 Apparatus and method to maintain constant fluid circulation during drilling Nov. 26, 2013
8505635 Device for a top drive drilling machine for continuous circulation of drilling mud Aug. 13, 2013
8490720 Self aligning mud saver valve seat Jul. 23, 2013
8443877 Drilling rig with top drive and inside blowout preventer May. 21, 2013
8443876 Top drive with inside blowout preventer May. 21, 2013
8434569 Short mud saver for use with top drive or kelly May. 7, 2013
8360154 Flow diverter ring for mud saver valves Jan. 29, 2013
8100199 Continuous fluid circulation valve for well drilling Jan. 24, 2012
8033338 Wellbore continuous circulation systems and method Oct. 11, 2011
RE42772 Large particulate removal system Oct. 4, 2011
8025108 Subterranean methods of processing hydrocarbon fluid-containing deposits and hydrocarbon recovery arrangements for recovering hydrocarbon-containing fluid from hydrocarbon-containing deposits Sep. 27, 2011
7987915 Circulating sub with mudsaver for dispensing and circulating fluid in a well bore Aug. 2, 2011
7857077 Method and apparatus for processing and injecting drill cuttings Dec. 28, 2010
7828081 Method of drilling a lossy formation Nov. 9, 2010
7699071 Linear motor to pre-bias shuttle force Apr. 20, 2010
7575072 Method and apparatus for processing and injecting drill cuttings Aug. 18, 2009
7562723 Method for determining formation fluid entry into or drilling fluid loss from a borehole using a dynamic annular pressure control system Jul. 21, 2009
7461698 Remotely operable top drive system safety valve having dual valve elements Dec. 9, 2008
7419012 Wellbore top drive systems Sep. 2, 2008
7360611 Flow system for a hydraulic choke solids strainer Apr. 22, 2008
7347286 Drill string valve assembly Mar. 25, 2008
7322418 Continuous circulation drilling method Jan. 29, 2008
7299866 Apparatus and method for cleaning out sand from an underbalanced hydrocarbon producing well Nov. 27, 2007
7281593 Method for the circulation of gas when drilling or working a well Oct. 16, 2007
7275606 Solids strainer system for a hydraulic choke Oct. 2, 2007
7252151 Drilling method Aug. 7, 2007
7195084 Systems and methods for storing and handling drill cuttings Mar. 27, 2007
7140455 Valve method for drilling with casing using pressurized drilling fluid Nov. 28, 2006
7048079 Mud saver valve May. 23, 2006
7028586 Apparatus and method relating to tongs, continous circulation and to safety slips Apr. 18, 2006
7025140 Large particulate removal system Apr. 11, 2006
7011160 High torque and high capacity rotatable center core with ram body assemblies Mar. 14, 2006
6779599 Tubular filling system Aug. 24, 2004
6766856 Large particulate removal system Jul. 27, 2004
6739408 Apparatus and method for preparing variable density drilling muds May. 25, 2004
6739397 Continuous circulation drilling method May. 25, 2004
6732819 Mudsaver valve with retrievable inner sleeve May. 11, 2004
6722425 Tubular filling system Apr. 20, 2004
6688394 Drilling methods and apparatus Feb. 10, 2004
6675889 Tubular filling system Jan. 13, 2004
6662886 Mudsaver valve with dual snap action Dec. 16, 2003
6637516 High torque and high capacity rotatable center core and floatable sealed body assemblies with universal RAM applications and method Oct. 28, 2003
6591916 Drilling method Jul. 15, 2003
6571876 Fill up tool and mud saver for top drives Jun. 3, 2003
6505691 Subsea mud pump and control system Jan. 14, 2003
6474418 Wellbore fluid recovery system and method Nov. 5, 2002
6460620 Mudsaver valve Oct. 8, 2002
6394194 Method and apparatus for a drill cutting injection system May. 28, 2002

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