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
Vladimir Dubinsky: Reference signal encoding for seismic while drilling measurement. Baker Hughes Incorporated, Groover & Bachand P C, June 20, 2000: US06078868 (171 worldwide citation)

A method for making seismic while drilling (SWD) measurements by determining and analyzing the reference signal downhole near the drill bit and sending a limited quantity of information to the surface by measurement-while-drilling (MWD) telemetry. In one embodiment, a library of anticipated drill bi ...


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
Robert P Macdonald, Volker Krueger, Vladimir Dubinsky, John D MacPherson, Dmitriy Dashevskiy: Method and apparatus for prediction control in drilling dynamics using neural networks. Baker Hughes Incorporated, Madan Mossman & Sriram P C, May 4, 2004: US06732052 (90 worldwide citation)

The present invention provides a drilling system that utilizes a neural network for predictive control of drilling operations. A downhole processor controls the operation of the various devices in a bottom hole assembly to effect changes to drilling parameters and drilling direction to autonomously ...


7
Dmitriy Dashevskiy, John D Macpherson, Vladimir Dubinsky, Pat McGinley: Real-time drilling optimization based on MWD dynamic measurements. Baker Hughes Incorporated, Madan Mossman & Sriram P C, February 6, 2007: US07172037 (60 worldwide citation)

A drilling control system provides, in one aspect, advisory actions for optimal drilling. Such a system or model utilizes downhole dynamics data and surface drilling parameters, to produce drilling models used to provide to a human operator with recommended drilling parameters for optimized performa ...


8
James V Leggett III, Vladimir Dubinsky, Douglas Patterson: Measurement-while-drilling acoustic system employing multiple, segmented transmitters and receivers. Baker Hughes Incorporated, Madan Mossman & Sriram P C, September 2, 2003: US06614360 (54 worldwide citation)

An acoustic MWD system comprises at least one transmitter array and at least one receiver array spaced axially along an essentially tubular downhole subassembly. Each transmitter and receiver array includes a plurality of elements circumferentially disposed on the outside of the assembly. The downho ...


9
Vladimir Dubinsky, Pushkar N Jogi, James V Leggett III, Douglas J Patterson, Alexei Bolshakov, Volker Krueger: Use of axial accelerometer for estimation of instantaneous ROP downhole for LWD and wireline applications. Baker Hughes Incorporated, Madan Mossman & Sriram P C, August 3, 2004: US06769497 (51 worldwide citation)

Determination of the rate of penetration (ROP) of drilling has usually been based upon surface measurements and may not be an accurate representation of the actual ROP. This can cause problems in Logging While Drilling (LWD). Because of the lack of a high-speed surface-to-downhole communication whil ...


10
James V Leggett III, Vladimir Dubinsky: Methods of generating directional low frequency acoustic signals and reflected signal detection enhancements for seismic while drilling applications. Baker Hughes Incorporated, Madan Mossman & Sriram P C, November 27, 2007: US07301852 (30 worldwide citation)

The present invention provides a method and apparatus for using an acoustic logging tool conveyed in a borehole in an earth formation for determining a characteristic of the formation. The method comprises using a first acoustic source for generating an acoustic signal in the earth formation at a fi ...