1
Lance D Underwood, Harold D Johnson, Charles H Dewey: Method and apparatus for automatic closed loop drilling system. Halliburton Company, Michael F Heim, July 26, 1994: US05332048 (234 worldwide citation)

An automatic closed loop drilling system is disclosed for providing automatic directional drilling capabilities in a bottomhole assembly. The drilling system includes at least one adjustable stabilizer that varies in response to formational and drilling conditions encountered downhole. A microcontro ...


2
John W Harrell, Vladimir Dubinsky, James V Leggett III: Closed loop drilling system. Baker Hughes Incorporated, Madan & Morris PLLC, November 24, 1998: US05842149 (224 worldwide citation)

The present invention provides a closed-loop drilling system for drilling oilfield boreholes. The system includes a drilling assembly with a drill bit, a plurality of sensors for providing signals relating to parameters relating to the drilling assembly, borehole, and formations around the drilling ...


3
John W Harrell, Valdimir Dubinsky, James V Leggett III: Closed loop drilling system. Baker Hughes Incorporated, Madan Mossman & Sriram P C, May 15, 2001: US06233524 (154 worldwide citation)

The present invention provides a closed-loop drilling system for drilling oilfield boreholes. The system includes a drilling assembly with a drill bit, a plurality of sensors for providing signals relating to parameters relating to the drilling assembly, borehole, and formations around the drilling ...


4
Carl Arthur Robbins, A J Mallett, John Wesley Minear, Batakrishna Mandal, James Robert Birchak, Eugene Joseph Linyaev: Acoustic logging while drilling tool to determine bed boundaries. Halliburton Energy Services, Conley Rose & Tayon PC, October 21, 1997: US05678643 (120 worldwide citation)

A LWD tool is disclosed for detecting the existence of and distance to adjacent bed boundaries. A transmitter assembly generates either a short acoustic pulse or a swept frequency signal that is detected by an associated receiver assembly. The received signal(s) are conditioned and converted to high ...


5
Volker Krueger: Closed loop drilling assembly with electronics outside a non-rotating sleeve. Baker Hughes Incorporated, Madan Mossman & Sriram P C, July 5, 2005: US06913095 (44 worldwide citation)

A closed-loop drilling system utilizes a bottom hole assembly (“BHA”) having a steering assembly having a rotating member and a non-rotating sleeve disposed thereon. The sleeve has a plurality of expandable force application members that engage a borehole wall. A power source and associated electron ...


6
Underwood Lance D, Johnson Harold D, Dewey Charles H: Automatic downhole drilling system.. Halliburton Co, April 27, 1994: EP0594418-A1 (18 worldwide citation)

An automatic closed loop drilling system provides automatic directional drilling capabilities in a bottomhole assembly, and includes at least one adjustable stabilizer (10) that varies in response to formational and drilling conditions encountered downhole. A microcontroller (40) is preprogrammed wi ...


7
Volker Krueger: Closed loop drilling assembly with electronics outside a non-rotating sleeve. Baker Hughes Incorporated, Madan & Sriram P C, July 7, 2009: US07556105 (16 worldwide citation)

A closed-loop drilling system utilizes a bottom hole assembly (“BHA”) having a steering assembly having a rotating member and a non-rotating sleeve disposed thereon. The non-rotating sleeve has a plurality of expandable force application members that engage a borehole wall. An orientation sensing sy ...


8
Harrell John W, Dubinsky Vladimir, Leggett James: Closed loop drilling system. Baker Hughes, August 12, 1998: EP0857249-A2 (2 worldwide citation)

The present invention provides a closed-loop drilling system for drilling oilfield boreholes. The system includes a drilling assembly with a drill bit, a plurality of sensors for providing signals relating to parameters relating to the driling assembly, borehole, and formations around the drilling a ...


9
William Banning Vail III, Tomislav Skerl, Damir S Skerl: Mud motor assembly. Smart Drilling and Completion, Sheridan Ross P C, April 4, 2017: US09611693 (1 worldwide citation)

A longer-lasting, lower cost, more powerful, all metal, mud motor than the presently available progressing cavity type mud motors for drilling boreholes into the earth. A mud motor apparatus possessing one single drive shaft that turns a rotary drill bit, which apparatus is attached to a drill pipe ...


10
Christian Leuchtenberg: Drilling system and method. Sughrue Mion Zinn Macpeak & Seas Pllc, August 22, 2002: US20020112888-A1 (1 worldwide citation)

A closed-loop drilling system and method of drilling oil, gas, or geothermal wells is described, whereby through the control of the flow rates in and out of the wellbore, and by adjusting the pressure inside the wellbore by a pressure/flow control device installed on the return line, surface pressur ...