1
Robert P MacDonald, Volker Krueger, Hatem N Nasr, John W Harrell, Roger W Fincher: Drilling system with integrated bottom hole assembly. Baker Hughes Incorporated, Madan Mossman & Sriram P C, March 27, 2001: US06206108 (166 worldwide citation)

The present invention provides a drilling system that utilizes an integrated bottom hole assembly. The bottom hole assembly contains sensors for determining the health of the bottom hole assembly, borehole condition, formation evaluation characteristics, drilling fluid physical and chemical properti ...


2
Roger W Fincher, Roland May, Peter Fontana, Larry Watkins, James W Macfarlane: Subsea wellbore drilling system for reducing bottom hole pressure. Deep Vision, Madan Mossman & Sriram P C, July 9, 2002: US06415877 (87 worldwide citation)

The present invention provides drilling systems for drilling subsea wellbores. The drilling system includes a tubing that passes through a sea bottom wellhead and carries a drill bit. A drilling fluid system continuously supplies drilling fluid into the tubing, which discharges at the drill bit bott ...


3
Roger W Fincher, Roland May, Peter Fontana, Larry Watkins, James W Macfarlane: Subsea wellbore drilling system for reducing bottom hole pressure. Deep Vision, Madan Mossman & Sriram P C, November 18, 2003: US06648081 (58 worldwide citation)

The present invention provides drilling systems for drilling subsea wellbores. The drilling system includes a tubing that passes through a sea bottom wellhead and carries a drill bit. A drilling fluid system continuously supplies drilling fluid into the tubing, which discharges at the drill bit bott ...


4
Roger W Fincher, Roland May, Peter Fontana, Larry Watkins, James W Macfarlane: Subsea wellbore drilling system for reducing bottom hole pressure. Deep Vision, Madan Mossman & Sriram P C, February 15, 2005: US06854532 (49 worldwide citation)

The present invention provides drilling systems for drilling subsea wellbores. The drilling system includes a tubing that passes through a sea bottom wellhead and carries a drill bit. A drilling fluid system continuously supplies drilling fluid into the tubing, which discharges at the drill bit bott ...


5
Sven Krueger, Volker Krueger, Peter Aronstam, Harald Grimmer, Roger W Fincher, Larry A Watkins: Active controlled bottomhole pressure system and method with continuous circulation system. Baker Hughes Incorporated, Mossman Kumar & Tyler PC, October 5, 2010: US07806203 (40 worldwide citation)

An APD Device provides a pressure differential in a wellbore to control dynamic pressure loss while drilling fluid is continuously circulated in the wellbore. A continuous circulation system circulates fluid both during drilling of the wellbore and when the drilling is stopped. Operating the APD Dev ...


6
Sven Krueger, Volker Krueger, Harald Grimmer, Roger W Fincher, Larry A Watkins, Peter Aronstam, Peter Fontana: Control systems and methods for real-time downhole pressure management (ECD control). Baker Hughes Incorporated, Mossman Kumar & Tyler PC, May 25, 2010: US07721822 (34 worldwide citation)

Methods and control systems are provided for a wellbore drilling system having an active differential pressure device (APD device) in fluid communication with a returning fluid. The APD Device creates a differential pressure across the device, which reduces the pressure below or downhole of the devi ...


7
Sven Krueger, Volker Krueger, Harald Grimmer, Larry A Watkins, Peter Aronstam, Peter Fontana, Roger W Fincher: Control systems and methods for active controlled bottomhole pressure systems. Baker Hughes Incorporated, Madan Mossman & Sriram P C, April 8, 2008: US07353887 (28 worldwide citation)

An active differential pressure device (APD device) in fluid communication with a returning fluid creates a differential pressure across the device, which controls pressure below the APD Device. In embodiments, a control unit controls the APD Device to provide a selected pressure differential at a w ...


8
Larry Watkins, Roger W Fincher, Peter Aronstam: Active vibration control for subterranean drilling operations. Baker Hughes Incorporated, Madan & Sriram P C, July 6, 2010: US07748474 (23 worldwide citation)

An active vibration control device improves drilling by actively applying a dampening profile and/or a controlled vibration to a drill string and/or bottomhole assembly (BHA). Embodiments of the present invention control the behavior of a drill string and/or BHA in order to prevent or minimize the o ...


9
Roger W Fincher, Peter Fontana: Apparatus and method for the disposition of drilling solids during drilling of subsea oilfield wellbores. Deep Vision, Madan Mossman & Sriram P C, March 4, 2003: US06527054 (22 worldwide citation)

This invention provides apparatus and methods for controlling the particle size of the solid mass present in the circulating drilling fluid returning from an underwater wellhead during the drilling of a subsea wellbore. The system may include a separator at the sea floor adjacent the wellhead, which ...


10
Roger W Fincher: Pressure-modulation valve assembly. Baker Hughes Incorporated, Duane Morris & Hechscher, August 15, 2000: US06102138 (20 worldwide citation)

A drillstring pressure-modulation valve which is usable in combination with a downhole drilling motor and a drillstring thruster to compensate for changes in pressure drop through the drilling motor which normally occur during drilling. When conditions change during drilling, which in turn changes t ...