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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 |
| 7367411 |
Drilling system and method |
May. 6, 2008 |
| 7334651 |
Kick warning system using high frequency fluid mode in a borehole |
Feb. 26, 2008 |
| 7319638 |
Hydraulic oscillator for use in a transmitter valve |
Jan. 15, 2008 |
| 7278496 |
Drilling system and method |
Oct. 9, 2007 |
| 7264058 |
Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells |
Sep. 4, 2007 |
| 7222681 |
Programming method for controlling a downhole steering tool |
May. 29, 2007 |
| 7145834 |
Well bore communication pulser |
Dec. 5, 2006 |
| 7108080 |
Method and apparatus for drilling a borehole with a borehole liner |
Sep. 19, 2006 |
| 7090033 |
Drill string shutoff valve |
Aug. 15, 2006 |
| 7044229 |
Downhole valve device |
May. 16, 2006 |
| 7044237 |
Drilling system and method |
May. 16, 2006 |
| 7044239 |
System and method for automatic drilling to maintain equivalent circulating density at a preferred value |
May. 16, 2006 |
| 6973977 |
Using fluids at elevated temperatures to increase fracture gradients |
Dec. 13, 2005 |
| 6957707 |
Method for controlling a drilling sequence, a rock drilling apparatus and a computer programme to form a drilling sequence |
Oct. 25, 2005 |
| 6920942 |
Method and apparatus for directly controlling pressure and position associated with an adjustable choke apparatus |
Jul. 26, 2005 |
| 6868920 |
Methods and systems for averting or mitigating undesirable drilling events |
Mar. 22, 2005 |
| 6854532 |
Subsea wellbore drilling system for reducing bottom hole pressure |
Feb. 15, 2005 |
| 6840337 |
Method and apparatus for removing cuttings |
Jan. 11, 2005 |
| 6820702 |
Automated method and system for recognizing well control events |
Nov. 23, 2004 |
| 6802379 |
Liquid lift method for drilling risers |
Oct. 12, 2004 |
| 6755261 |
Method and system for controlling well fluid circulation rate |
Jun. 29, 2004 |
| 6739408 |
Apparatus and method for preparing variable density drilling muds |
May. 25, 2004 |
| 6668943 |
Method and apparatus for controlling pressure and detecting well control problems during drilling of an offshore well using a gas-lifted riser |
Dec. 30, 2003 |
| 6648081 |
Subsea wellbore drilling system for reducing bottom hole pressure |
Nov. 18, 2003 |
| 6607042 |
Method of dynamically controlling bottom hole circulation pressure in a wellbore |
Aug. 19, 2003 |
| 6607043 |
Down hole motors and methods for their operation |
Aug. 19, 2003 |
| 6588518 |
Drilling method and measurement-while-drilling apparatus and shock tool |
Jul. 8, 2003 |
| 6484816 |
Method and system for controlling well bore pressure |
Nov. 26, 2002 |
| 6474422 |
Method for controlling a well in a subsea mudlift drilling system |
Nov. 5, 2002 |
| 6415877 |
Subsea wellbore drilling system for reducing bottom hole pressure |
Jul. 9, 2002 |
| 6401838 |
Method for detecting stuck pipe or poor hole cleaning |
Jun. 11, 2002 |
| 6394195 |
Methods for the dynamic shut-in of a subsea mudlift drilling system |
May. 28, 2002 |
| 6378628 |
Monitoring system for drilling operations |
Apr. 30, 2002 |
| 6364034 |
Directional drilling apparatus |
Apr. 2, 2002 |
| 6325163 |
Bit torque limiting device |
Dec. 4, 2001 |
| 6289999 |
Fluid flow control devices and methods for selective actuation of valves and hydraulic drilling tools |
Sep. 18, 2001 |
| 6257354 |
Drilling fluid flow monitoring system |
Jul. 10, 2001 |
| 6237701 |
Impulsive suction pulse generator for borehole |
May. 29, 2001 |
| 6216801 |
Method and apparatus for providing proportional injection of additives into drilling fluids |
Apr. 17, 2001 |
| 6176327 |
Method and toolstring for operating a downhole motor |
Jan. 23, 2001 |
| 6167969 |
Remote control valve |
Jan. 2, 2001 |
| 6152246 |
Method of and system for monitoring drilling parameters |
Nov. 28, 2000 |
| 6109370 |
System for directional control of drilling |
Aug. 29, 2000 |
| 6105689 |
Mud separator monitoring system |
Aug. 22, 2000 |
| 6019180 |
Method for evaluating the power output of a drilling motor under downhole conditions |
Feb. 1, 2000 |
| 5964304 |
Method and apparatus for drill cuttings transfer |
Oct. 12, 1999 |
| 5443128 |
Device for remote actuating equipment comprising delay means |
Aug. 22, 1995 |
| 5437308 |
Device for remotely actuating equipment comprising a bean-needle system |
Aug. 1, 1995 |
| 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 |
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