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Class Information
Number: 175/324
Name: Boring or penetrating the earth > With tool shaft detail > Means other than tool structure to induce fluent flow
Description: Apparatus including structure other than the structure of the tool which is specifically adapted to cause the circulation of flowable material (e.g., cuttings or drilling fluid) within the tool shaft or borehole.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8662795 Head for injecting consolidating pressurised fluid mixtures into the ground Mar. 4, 2014
8408336 Flow guide actuation Apr. 2, 2013
8403078 Methods and apparatus for wellbore construction and completion Mar. 26, 2013
8393417 Apparatus and methods to optimize fluid flow and performance of downhole drilling equipment Mar. 12, 2013
8336645 Drilling cuttings mobilizer and method for use Dec. 25, 2012
8297375 Downhole turbine Oct. 30, 2012
8267196 Flow guide actuation Sep. 18, 2012
8251144 Flow diverter Aug. 28, 2012
8225883 Downhole percussive tool with alternating pressure differentials Jul. 24, 2012
8066069 Method and apparatus for wellbore construction and completion Nov. 29, 2011
RE42877 Methods and apparatus for wellbore construction and completion Nov. 1, 2011
8011450 Active bottomhole pressure control with liner drilling and completion systems Sep. 6, 2011
8002051 Connection device for forming a fluid supply Aug. 23, 2011
7984772 Downhole centrifugal drilling fluid separator Jul. 26, 2011
7980332 Downhole centrifugal drilling fluid separator Jul. 19, 2011
7967082 Downhole mechanism Jun. 28, 2011
7958952 Pulse rate of penetration enhancement device and method Jun. 14, 2011
7849935 System and method for drilling wellbores Dec. 14, 2010
7836977 Method of drilling a well at or under balance using a electrical submersible pump Nov. 23, 2010
7810583 Drilling systems and methods Oct. 12, 2010
7806203 Active controlled bottomhole pressure system and method with continuous circulation system Oct. 5, 2010
7762353 Downhole valve mechanism Jul. 27, 2010
7730975 Drill bit porting system Jun. 8, 2010
7703549 Method and apparatus for removing cuttings in high-angle wells Apr. 27, 2010
7703551 Fluid driven drilling motor and system Apr. 27, 2010
7677332 Method and apparatus for managing variable density drilling mud Mar. 16, 2010
7669663 Resettable actuator for downhole tool Mar. 2, 2010
7647989 Backup safety flow control system for concentric drill string Jan. 19, 2010
7624810 Ball dropping assembly and technique for use in a well Dec. 1, 2009
7617886 Fluid-actuated hammer bit Nov. 17, 2009
7562725 Downhole pilot bit and reamer with maximized mud motor dimensions Jul. 21, 2009
7563060 Vacuum drilling system Jul. 21, 2009
7455113 Downhole impeller device Nov. 25, 2008
7424922 Rotary valve for a jack hammer Sep. 16, 2008
7387176 Down hole air diverter Jun. 17, 2008
7383881 Stabiliser, jetting and circulating tool Jun. 10, 2008
7353887 Control systems and methods for active controlled bottomhole pressure systems Apr. 8, 2008
7350598 Downhole tool Apr. 1, 2008
7311148 Methods and apparatus for wellbore construction and completion Dec. 25, 2007
7296637 Oil drilling tool Nov. 20, 2007
7281592 Injecting a fluid into a borehole ahead of the bit Oct. 16, 2007
7243743 Drilling assembly and method for drilling a barehole into geological formations Jul. 17, 2007
7204327 Reverse circulation directional and horizontal drilling using concentric drill string Apr. 17, 2007
7174975 Control systems and methods for active controlled bottomhole pressure systems Feb. 13, 2007
7114581 Active controlled bottomhole pressure system & method Oct. 3, 2006
7108080 Method and apparatus for drilling a borehole with a borehole liner Sep. 19, 2006
7090039 Assembly for drilling low pressure formation Aug. 15, 2006
7090023 Apparatus and methods for drilling with casing Aug. 15, 2006
6966393 Drill drive steel Nov. 22, 2005
6918452 Drill string shutoff valve Jul. 19, 2005

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