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Class Information
Number: 175/317
Name: Boring or penetrating the earth > With means movable relative to tool or shaft to control below-ground passage
Description: Apparatus in which a tool or tool shaft is provided with a passage and means movable relative to said tool or tool shaft for regulating or controlling the flow of fluent material through said passage while the tool or tool shaft is positioned below ground.










Sub-classes under this class:

Class Number Class Name Patents
175/318 Valve prevents upward flow 82


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8607896 Jet turbodrill Dec. 17, 2013
8439133 Down hole apparatus for generating a pusling action May. 14, 2013
8327954 Optimized reaming system based upon weight on tool Dec. 11, 2012
8251144 Flow diverter Aug. 28, 2012
8210266 Drill pipe Jul. 3, 2012
8201643 System and method for longitudinal and lateral jetting in a wellbore Jun. 19, 2012
8074745 Tool for crushing coke Dec. 13, 2011
8074746 Tool for crushing coke Dec. 13, 2011
8011457 Downhole hammer assembly Sep. 6, 2011
7958952 Pulse rate of penetration enhancement device and method Jun. 14, 2011
7913772 Drilling fluid flow diverter Mar. 29, 2011
7845433 Device and procedure for the insertion of a new drilling string-element into the drill-string of a well Dec. 7, 2010
7779934 Flexible/rigid drilling assembly Aug. 24, 2010
7726418 Method and apparatus for adding a tubular to drill string with diverter Jun. 1, 2010
7717197 Apparatus for keeping a down hole drilling tool vertically aligned May. 18, 2010
7699120 On demand actuation system Apr. 20, 2010
7647989 Backup safety flow control system for concentric drill string Jan. 19, 2010
7644766 Flushing device and method of flushing an annular space Jan. 12, 2010
7424922 Rotary valve for a jack hammer Sep. 16, 2008
7387176 Down hole air diverter Jun. 17, 2008
7350598 Downhole tool Apr. 1, 2008
7347289 Dart-operated big bore by-pass valve Mar. 25, 2008
7347288 Ball operated by-pass tool for use in drillstring Mar. 25, 2008
7296637 Oil drilling tool Nov. 20, 2007
7287603 Combined casing expansion/casing while drilling method and apparatus Oct. 30, 2007
7140454 Well drilling bit Nov. 28, 2006
7108081 Instrumented internal blowout preventer valve for measuring drill string drilling parameters Sep. 19, 2006
7048079 Mud saver valve May. 23, 2006
6830107 Fluid flow switching device Dec. 14, 2004
6820697 Downhole bypass valve Nov. 23, 2004
6739412 Pile boring tools May. 25, 2004
6651746 High torque and high capacity rotatable center core and floatable sealed body assemblies with universals ram applications and method Nov. 25, 2003
6595281 Apparatus for delivering a flowable substance to a remote location Jul. 22, 2003
6550548 Rotary steering tool system for directional drilling Apr. 22, 2003
6508317 Downhole apparatus and method of use Jan. 21, 2003
6497295 Torque limiting tool Dec. 24, 2002
6488092 By-pass valve Dec. 3, 2002
6460620 Mudsaver valve Oct. 8, 2002
6457541 Surface controlled by-pass valve Oct. 1, 2002
6318482 Blowout preventer Nov. 20, 2001
6279670 Downhole flow pulsing apparatus Aug. 28, 2001
6263981 Deepwater drill string shut-off valve system and method for controlling mud circulation Jul. 24, 2001
6253861 Circulation tool Jul. 3, 2001
6230821 Weight control system for a rotary drill assembly May. 15, 2001
6161632 Purging means for purging upwards in ring spacing between drill pipe and bore hole wall Dec. 19, 2000
6053191 Mud-saver valve Apr. 25, 2000
5911285 Erosion resistant downhole mud diverter tool Jun. 15, 1999
5901796 Circulating sub apparatus May. 11, 1999
5730222 Downhole activated circulating sub Mar. 24, 1998
5584352 Pneumatic drilling chip removal system and method Dec. 17, 1996

1 2 3










 
 
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