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Class Information
Number: 175/100
Name: Boring or penetrating the earth > With below-ground tool drive prime mover > Discharge passage for motive fluid directed toward bore entrance
Description: Apparatus in which the motor is fluid operated and means are provided for exhausting a portion of the fluid which operates the motor from the motor or motor housing into the bore in a direction extending toward the bore entrance.










Patents under this class:

Patent Number Title Of Patent Date Issued
8297379 Systems and methods for providing a gearless drilling turbine Oct. 30, 2012
8240397 Method to control bit load Aug. 14, 2012
7665549 Entrainment fluid channeling device for a down-hole drill string Feb. 23, 2010
7523792 Method and apparatus for shifting speeds in a fluid-actuated motor Apr. 28, 2009
7172039 Down-hole vane motor Feb. 6, 2007
6763899 Deformable blades for downhole applications in a wellbore Jul. 20, 2004
6702045 Drilling apparatus Mar. 9, 2004
6427787 Drilling motor that operates pursuant to the Moineau principle for drilling deep holes Aug. 6, 2002
6364038 Downhole flexible drive system Apr. 2, 2002
6206112 Multiple lateral hydraulic drilling apparatus and method Mar. 27, 2001
6102138 Pressure-modulation valve assembly Aug. 15, 2000
6015018 Method and apparatus for moving a piston Jan. 18, 2000
5682957 Water separator for a down hole drill Nov. 4, 1997
5590725 Drilling column with sledgehammer drilling head Jan. 7, 1997
5351764 Method and apparatus for enlarging an underground path Oct. 4, 1994
5143162 Device for removing debris from a drillhole Sep. 1, 1992
5139095 Method for removing debris from a drillhole Aug. 18, 1992
4919204 Apparatus and methods for cleaning a well Apr. 24, 1990
4905775 Drilling system and flow control apparatus for downhole drilling motors Mar. 6, 1990
4880065 Air motor operated rotary earth drilling tool Nov. 14, 1989
4852667 Pressure relief process for well-drilling Aug. 1, 1989
4771835 Downhole hammer Sep. 20, 1988
4678045 Turbine tool Jul. 7, 1987
4553611 Pressure drop regulator for downhole turbine Nov. 19, 1985
4545443 Means for drilling Oct. 8, 1985
4432423 Apparatus for extended straight line drilling from a curved borehole Feb. 21, 1984
4408669 Means for drilling Oct. 11, 1983
4274497 Skirted hammer sub for dual tube drilling Jun. 23, 1981
4106571 Pneumatic impact drilling tool Aug. 15, 1978
3993355 Mining machine having pneumatic conveyance and cutter head floor driven about anchor Nov. 23, 1976
3948058 Device for soil sampling under water Apr. 6, 1976
3941196 Percussive air hammer and core bit apparatus Mar. 2, 1976











 
 
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