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Class Information
Number: 175/38
Name: Boring or penetrating the earth > Automatic control > In response to drilling fluid circulation
Description: Subject matter in which a sensed characteristic of drilling fluid circulation controls a power operated means to modify the boring operation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5392867 |
Device for remotely operating and assembly comprising a bean/needle system, and use thereof in a drill string |
Feb. 28, 1995 |
| 5343963 |
Method and apparatus for providing controlled force transference to a wellbore tool |
Sep. 6, 1994 |
| 5310012 |
Actuating device associated with a drill string and comprising a hydrostatic drilling fluid circuit, actuation method and application thereof |
May. 10, 1994 |
| 5279373 |
Controllable drill head |
Jan. 18, 1994 |
| 5259467 |
Directional drilling tool |
Nov. 9, 1993 |
| 5205364 |
Process and drilling equipment for sinking a well in underground rock formations |
Apr. 27, 1993 |
| 5186264 |
Device for guiding a drilling tool into a well and for exerting thereon a hydraulic force |
Feb. 16, 1993 |
| 5065825 |
Method and device for remote-controlling drill string equipment by a sequence of information |
Nov. 19, 1991 |
| 4905775 |
Drilling system and flow control apparatus for downhole drilling motors |
Mar. 6, 1990 |
| 4895214 |
Directional drilling tool |
Jan. 23, 1990 |
| 4844182 |
Method for improving drill cuttings transport from a wellbore |
Jul. 4, 1989 |
| 4817739 |
Drilling enhancement tool |
Apr. 4, 1989 |
| 4793421 |
Programmed automatic drill control |
Dec. 27, 1988 |
| 4655299 |
Angle deviation tool |
Apr. 7, 1987 |
| 4655289 |
Remote control selector valve |
Apr. 7, 1987 |
| 4653597 |
Method for circulating and maintaining drilling mud in a wellbore |
Mar. 31, 1987 |
| 4637479 |
Methods and apparatus for controlled directional drilling of boreholes |
Jan. 20, 1987 |
| 4615399 |
Valved jet device for well drills |
Oct. 7, 1986 |
| 4606415 |
Method and system for detecting and identifying abnormal drilling conditions |
Aug. 19, 1986 |
| 4535851 |
Fluid flow measurement system |
Aug. 20, 1985 |
| 4470430 |
Drilling choke |
Sep. 11, 1984 |
| 4440239 |
Method and apparatus for controlling the flow of drilling fluid in a wellbore |
Apr. 3, 1984 |
| 4413688 |
Diverter valve |
Nov. 8, 1983 |
| 4403655 |
Draw works disabling device for use with a well drilling apparatus |
Sep. 13, 1983 |
| 4355784 |
Method and apparatus for controlling back pressure |
Oct. 26, 1982 |
| 4305110 |
Mud separator valve apparatus |
Dec. 8, 1981 |
| 4291772 |
Drilling fluid bypass for marine riser |
Sep. 29, 1981 |
| 4281678 |
Throttling mud choke apparatus |
Aug. 4, 1981 |
| 4270800 |
Pre-start warning device for a machine |
Jun. 2, 1981 |
| 4257442 |
Choke for controlling the flow of drilling mud |
Mar. 24, 1981 |
| 4253530 |
Method and system for circulating a gas bubble from a well |
Mar. 3, 1981 |
| 4190073 |
Choke for controlling the flow of drilling mud |
Feb. 26, 1980 |
| 4149603 |
Riserless mud return system |
Apr. 17, 1979 |
| 4090523 |
System for automatically flushing hydrocyclones used in drilling mud treatment |
May. 23, 1978 |
| 4064951 |
Underreamer having cutter arm position indication |
Dec. 27, 1977 |
| 4044834 |
Apparatus and method for controlling the flow of fluids from a well bore |
Aug. 30, 1977 |
| 3967680 |
Method and apparatus for actuating a downhole device carried by a pipe string |
Jul. 6, 1976 |
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