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Class Information
Number: 175/93
Name: Boring or penetrating the earth > With below-ground tool drive prime mover > Below-ground (1) generation of motive fluid, or (2) storage of motivating energy
Description: Apparatus in which (1) the motor is fluid operated, and means are provided within the borehole for generating or imparting energy to the motive fluid, (2) means are provided within the borehole for storing a source of motivating energy for operating the motor.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7562725 |
Downhole pilot bit and reamer with maximized mud motor dimensions |
Jul. 21, 2009 |
| 7549487 |
Mandrel and bearing assembly for downhole drilling motor |
Jun. 23, 2009 |
| 7404458 |
Rotary percussive drilling device |
Jul. 29, 2008 |
| 7159676 |
Fluid distributor device for down-hole-drills |
Jan. 9, 2007 |
| 7040417 |
Drilling systems |
May. 9, 2006 |
| 6959760 |
Downhole pulser |
Nov. 1, 2005 |
| 6910542 |
Acoustic flow pulsing apparatus and method for drill string |
Jun. 28, 2005 |
| 6702045 |
Drilling apparatus |
Mar. 9, 2004 |
| 6568485 |
Stalled motor by-pass valve |
May. 27, 2003 |
| 6516897 |
Self-contained excavator and anchor apparatus and method |
Feb. 11, 2003 |
| 6464023 |
Hydraulic in-the-hole percussion rock drill |
Oct. 15, 2002 |
| 6374924 |
Downhole drilling apparatus |
Apr. 23, 2002 |
| 6293357 |
Hydraulic in-the-hole percussion rock drill |
Sep. 25, 2001 |
| 6073708 |
Downhole mud pressure intensifier |
Jun. 13, 2000 |
| 6050349 |
Hydraulic system for mud pulse generation |
Apr. 18, 2000 |
| 5984026 |
Pressure converter |
Nov. 16, 1999 |
| 5941325 |
Pressure converter (B) |
Aug. 24, 1999 |
| 5934392 |
Pressure converter |
Aug. 10, 1999 |
| 5890547 |
Pressure converter |
Apr. 6, 1999 |
| 5662180 |
Percussion drill assembly |
Sep. 2, 1997 |
| 5577564 |
Rotary fluid converter |
Nov. 26, 1996 |
| 5375671 |
Converter group and pressure converter for use therein |
Dec. 27, 1994 |
| 5361857 |
Pressure converter |
Nov. 8, 1994 |
| 5267622 |
Impact block assembly for percussion drilling apparatus |
Dec. 7, 1993 |
| 5246080 |
High pressure converter for deep well drilling |
Sep. 21, 1993 |
| 4928775 |
Downhole surge valve for earth boring apparatus |
May. 29, 1990 |
| 4883133 |
Combustion operated drilling apparatus |
Nov. 28, 1989 |
| 4711309 |
Drilling apparatus |
Dec. 8, 1987 |
| 4531593 |
Substantially self-powered fluid turbines |
Jul. 30, 1985 |
| 4515225 |
Mud energized electrical generating method and means |
May. 7, 1985 |
| 4483394 |
Hydraulic power unit for measurement while drilling apparatus |
Nov. 20, 1984 |
| 4462469 |
Fluid motor and telemetry system |
Jul. 31, 1984 |
| 4431064 |
Hydraulic drive apparatus for downhole tools providing rotational and translational motion |
Feb. 14, 1984 |
| 4378850 |
Hydraulic fluid supply apparatus and method for a downhole tool |
Apr. 5, 1983 |
| 4371958 |
Drilling orientation tool |
Feb. 1, 1983 |
| 4278136 |
Sinkerdrill |
Jul. 14, 1981 |
| 4256191 |
Intermittent high-drag oil well drilling methods and apparatus |
Mar. 17, 1981 |
| 4226285 |
Magnetic junk retriever |
Oct. 7, 1980 |
| 4211291 |
Drill fluid powered hydraulic system |
Jul. 8, 1980 |
| 4211292 |
Borehole angle control by gage corner removal effects |
Jul. 8, 1980 |
| RE30246 |
Methods and apparatus for driving a means in a drill string while drilling |
Apr. 1, 1980 |
| 4147223 |
Logging-while-drilling apparatus |
Apr. 3, 1979 |
| 4098359 |
Hydraulically operated downhole motor |
Jul. 4, 1978 |
| 4051909 |
Turbine drill for drilling at great depths |
Oct. 4, 1977 |
| 4004642 |
Tround terra-drill processes and apparatus |
Jan. 25, 1977 |
| 3934659 |
Apparatus for drilling holes in earth surface |
Jan. 27, 1976 |
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