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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:
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Patent Number Title Of Patent Date Issued
8684109 Drilling method for drilling a subterranean borehole Apr. 1, 2014
8613331 On demand actuation system Dec. 24, 2013
8528660 System and method for safe well control operations Sep. 10, 2013
8522896 Consistent drilling fluids engineering and management Sep. 3, 2013
8517692 Pressure limiting controller Aug. 27, 2013
8457898 System and method for real-time quality control for downhole logging devices Jun. 4, 2013
8408331 Downhole downlinking system employing a differential pressure transducer Apr. 2, 2013
8327954 Optimized reaming system based upon weight on tool Dec. 11, 2012
8322439 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells Dec. 4, 2012
8307913 Drilling system with drill string valves Nov. 13, 2012
8256532 System, program products, and methods for controlling drilling fluid parameters Sep. 4, 2012
8251144 Flow diverter Aug. 28, 2012
8240397 Method to control bit load Aug. 14, 2012
8240398 Annulus pressure setpoint correction using real time pressure while drilling measurements Aug. 14, 2012
8196678 Method of downlinking to a downhole tool Jun. 12, 2012
8146681 Drilling tool and drilling method Apr. 3, 2012
8132630 Reverse circulation pressure control method and system Mar. 13, 2012
RE43199 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells Feb. 21, 2012
8073623 System and method for real-time quality control for downhole logging devices Dec. 6, 2011
7984770 Method for determining formation integrity and optimum drilling parameters during drilling Jul. 26, 2011
7980326 Method and system for controlling force in a down-hole drilling operation Jul. 19, 2011
7967082 Downhole mechanism Jun. 28, 2011
7958948 Method and system for return of drilling fluid Jun. 14, 2011
7950472 Downhole local mud weight measurement near bit May. 31, 2011
7938190 Anchored riserless mud return systems May. 10, 2011
7908034 System, program products, and methods for controlling drilling fluid parameters Mar. 15, 2011
7886847 Monitoring flow rates while retrieving bottom hole assembly during casing while drilling operations Feb. 15, 2011
7828080 Distributed intelligence for enhanced monitoring and control of oilfield processes Nov. 9, 2010
7828081 Method of drilling a lossy formation Nov. 9, 2010
7828083 Method of controlling operation of rock drilling rig, and rock drilling rig Nov. 9, 2010
7823656 Method for monitoring drilling mud properties Nov. 2, 2010
7806203 Active controlled bottomhole pressure system and method with continuous circulation system Oct. 5, 2010
7762353 Downhole valve mechanism Jul. 27, 2010
7699071 Linear motor to pre-bias shuttle force Apr. 20, 2010
7699120 On demand actuation system Apr. 20, 2010
7677329 Method and device for controlling drilling fluid pressure Mar. 16, 2010
7650950 Drilling system and method Jan. 26, 2010
7562723 Method for determining formation fluid entry into or drilling fluid loss from a borehole using a dynamic annular pressure control system Jul. 21, 2009
7500529 Method and apparatus for predicting and controlling secondary kicks while dealing with a primary kick experienced when drilling an oil and gas well Mar. 10, 2009
7426967 Rotary steerable tool including drill string rotation measurement apparatus Sep. 23, 2008
7407019 Method of dynamically controlling open hole pressure in a wellbore using wellhead pressure control Aug. 5, 2008
7395878 Drilling system and method Jul. 8, 2008
7392857 Apparatus and method for vibrating a drill bit Jul. 1, 2008
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

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