1
James V Leggett III, Vladimir Dubinsky, John W Harrell, William Thomas Balogh, Paul J G Seaton, Andrew G Brooks, Roger P Herbert: Drilling system with an acoustic measurement-while-driving system for determining parameters of interest and controlling the drilling direction. Baker Hughes Incorporated, Madan Mossman & Sriram P C, July 11, 2000: US06088294 (262 worldwide citation)

The present invention provides a system for drilling boreholes having a downhole subassembly which contains an acoustic measurement-while-drilling system. The acoustic system contains an acoustic transmitter and receiver for determining the acoustic velocity through the formations surrounding the bo ...


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
Vladimir Dubinsky, James V Leggett III: Drilling system utilizing downhole dysfunctions for determining corrective actions and simulating drilling conditions. Baker Hughes Incorporated, Madan & Morris P C, February 1, 2000: US06021377 (217 worldwide citation)

The present invention provides a closed-loop system for drilling boreholes. The system includes a drill string having a drill bit, a plurality of sensors for providing signals relating to the drill string and formation parameters, a downhole device which processes various downhole sensors signals an ...


4
James V Leggett III: Measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers. Baker Hughes Incorporated, Madan Mossman & Sriram P C, July 4, 2000: US06084826 (208 worldwide citation)

This invention is directed toward apparatus and methods for obtaining acoustic measurements or "logs" of earth formations penetrated by a borehole. More particularly, the invention is directed toward obtaining the acoustic measurements while the borehole is being drilled. The downhole apparatus comp ...


5
Vladimir Dubinsky, James V Leggett III, Alexi Bolshakov: Semblance processing for an acoustic measurement-while-drilling system for imaging of formation boundaries. Baker Hughes Incorporated, Madan Mossman & Sriram P C, July 30, 2002: US06427124 (171 worldwide citation)

The present invention provides a system for drilling boreholes having a downhole subassembly which contains an acoustic measurement-while-drilling system. It uses the acoustic velocity through the formations surrounding the borehole and an acoustic transmitter and a set of receivers for determining ...


6
MacMillan M Wisler, Wallace H Meyer, Daniel Minette, Ronald Deady, James V Leggett III, Herbert W Beimgraben, Bernard G Hubner: Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto. Baker Hughes Incorporated, Madan & Morris PLLC, September 22, 1998: US05812068 (163 worldwide citation)

The present invention provides a measurement-while-drilling (MWD) system having a downhole computer and multiple downhole sensors. Relatively large amounts of basic or "raw" data are measured by downhole sensors, and these data are processed within a downhole computer to be reduced to parameters of ...


7
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 ...


8
Macmillan H Wisler, Wallace H Meyer, Daniel Minette, Ronald deady, James V Leggett III, Herbert W Beimgraben, Bernard G Hubner: Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto. Baker Hughes Incorporated, Madan Mossman & Sriram P C, August 7, 2001: US06272434 (118 worldwide citation)

The present invention provides a measurement-while-drilling (MWD) system having a downhole computer and multiple downhole sensors. Relatively large amounts of basic or “raw” data are measured by downhole sensors, and these data are processed within a downhole computer to be reduced to parameters of ...


9
Nils Reimers, John W Harrell, James V Leggett III, Paulo S Tubel: Method of obtaining improved geophysical information about earth formations. Baker Hughes Corporation, Madan Mossman & Sriram P C, May 23, 2000: US06065538 (115 worldwide citation)

The present invention provides a method for forming wellbores. In one method, one or more wellbores are drilled along preplanned paths based in part upon seismic surveys performed from the surface. An acoustic transmitter conveyed in such wellbores transmits acoustic signals at a one or more frequen ...


10
Gregory R Nazzal, Paulo S Tubel, Gerald D Lynde, John W Harrell, James V Leggett III: Apparatus and method for performing imaging and downhole operations at a work site in wellbores. Baker Hughes Incorporated, Madan Mossman & Sriram P C, March 28, 2000: US06041860 (86 worldwide citation)

The present invention provides a downhole service tool for imaging a location constituting a work site of interest downhole at which a tool operation is to be performed in a preexisting wellbore and for performing a tool operation at the work site during a single trip of the tool, The downhole servi ...