1
John B Weirich, Ronald G Bland, William W Smith Jr, Volker Krueger, John W Harrell, Hatem N Nasr, Valeri Papanyan: Drilling systems with sensors for determining properties of drilling fluid downhole. Baker Hughes Incorporated, Madan Mossman & Sriram P C, January 23, 2001: US06176323 (272 worldwide citation)

The present invention provides a drilling system for drilling oilfield boreholes or wellbores utilizing a drill string having a drilling assembly conveyed downhole by a tubing (usually a drill pipe or coiled tubing). The drilling assembly includes a bottom hole assembly (BHA) and a drill bit. The bo ...


2
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 ...


3
Volker Krueger: Self-controlled directional drilling systems and methods. Baker Hughes Incorporated, Madan Mossman & Sriram P C, February 4, 2003: US06513606 (129 worldwide citation)

The present invention provides a drilling assembly that includes a mud motor that rotates a drill bit and a set of independently expandable ribs. A stabilizer uphole of the ribs provides stability. A second set of ribs may be disposed on the drilling assembly. Vertical and curved holes are drilled b ...


4
Donald Jewkes, Volker Krueger: Integrated directional under-reamer and stabilizer. Baker Hughes Incorporated, Madan Mossman & Sriram P C, May 9, 2000: US06059051 (123 worldwide citation)

The present invention is an apparatus for use in drilling operations. It uses an under-reamer having a plurality of elongated arms with cutting elements at the ends of the arms for enlarging a previously drilled borehole drilled by a drill bit. One or more stabilizers in close proximity to the under ...


5
Per Erik Berger, Volker Krueger, Matthias Meister, John M Michaels, Jaedong Lee: Modified formation testing apparatus with borehole grippers and method of formation testing. Baker Hughes Incorporated, Madan Mossman & Sriram P C, June 24, 2003: US06581455 (93 worldwide citation)

An apparatus and method for obtaining samples of pristine formation or; formation fluid, using a work string designed for performing other downhole work such as drilling, workover operations, or re-entry operations. An extendable element extends against the formation wall to obtain the pristine form ...


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
Volker Krueger, Matthias Meister, John M Michaels, Jaedong Lee, Stanley C Jones: Closed-loop drawdown apparatus and method for in-situ analysis of formation fluids. Baker Hughes Incorporated, Madan Mossman & Sriram P C, August 26, 2003: US06609568 (74 worldwide citation)

An apparatus and method capable of incrementally decreasing the borehole pressure at a variable rate by controlling a test volume within the borehole. The system includes an incrementally controllable pump, closed loop feedback and a controller for drawing down the pressure of a test volume to a lev ...


8
Jaedong Lee, John M Michaels, Volker Krueger, Matthias Meister, Per Erik Berger: Formation testing while drilling apparatus with axially and spirally mounted ports. Baker Hughes Incorporated, Madan Mossman & Sriram P C, July 1, 2003: US06585045 (70 worldwide citation)

An apparatus and method for determining permeability of a subterranean formation is provided. The apparatus and method comprise a work string, at least one selectively extendable member mounted on the work string to isolate a portion of the annular space between the work string and borehole. A prede ...


9
Volker Krueger, Hans Juergen Faber, Dagobert Feld: Drilling tool for sinking wells in underground rock formations. Baker Hughes Incorporated, Joseph A Walkowski, December 8, 1992: US05168941 (58 worldwide citation)

The present invention provides an apparatus for orienting a drilling tool in a borehole, and which employs drilling mud pressure to selectively hydraulically move force-transmitting elements associated with pressure members on the exterior of the tool against the wall of the borehole, or to radially ...


10
Sven Krueger, Volker Krueger, Harald Grimmer, Joerg Christanseen, Volker Peters: Downhole cutting mill. Baker Hughes Incorporated, Madan Mossman & Sriram P C, January 3, 2006: US06981561 (57 worldwide citation)

A downhole device processes particles entrained in a drilling fluid returning up a wellbore. In one embodiment, the device includes a housing having at least one cutting surface formed in a chamber of a housing. A cutting head disposed in the chamber crushes or comminutes the particles entrained in ...