William A. Goldman
Engineering in Houston, TX

6408953, Jun 25, 2002

Aug 28, 2000

09/649495

William A. Goldman - Houston TX
Oliver Matthews, III - Spring TX
William W. King - Houston TX
Gary E. Weaver - Conroe TX
Gerald L. Pruitt - Houston TX

Halliburton Energy Services, Inc. - Carrollton TX

E21B 4700

175 39, 175 40, 175 57, 702 9

A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specifications of proposed drilling equipment for use in the drilling of the well bore, and predicting a drilling mechanics in response to the specifications as a function of the geology characteristic per unit depth according to a prescribed drilling mechanics model. Responsive to a predicted drilling mechanics, a controller controls a parameter in the drilling of the well bore. The geology characteristic includes at least rock strength. The specifications include at least a bit specification of a recommended drill bit. Lastly, the predicted drilling mechanics include at least one of bit wear, mechanical efficiency, power, and operating parameters. A display is provided for generating a display of the geology characteristic and predicted drilling mechanics per unit depth, including either a display monitor or a printer.

6044327, Mar 28, 2000

Nov 13, 1997

8/970171

William A. Goldman - Houston TX

Dresser Industries, Inc. - Dallas TX

G06F 1900

702 11

A well logging instrument, embodied both in drillstring and in wireline logging systems, is caused to traverse an earth borehole and to generate lithology-related data. First and second lithology compositional models are constructed from such data and are combined to determine a range of possible solutions having an upper limit defined by a pure component model and a lower limit defined by a proportional mixture model, thus allowing the maximum concentration of any lithologic component to vary between 0% and 100%. The exact value of the lithology lies between the upper and lower limits in the range of values and can be calibrated to a mineralogic analysis of actual core samples or drill cuttings.

6109368, Aug 29, 2000

Nov 13, 1998

9/192389

William A. Goldman - Houston TX
Lee Morgan Smith - Houston TX
Oliver Mathews - Spring TX
Kambiz Arab - Houston TX
William W. King - Houston TX
Kelley M. Murrell - Houston TX
Gary E. Weaver - Conroe TX

Dresser Industries, Inc. - Dallas TX

E21B 4700, E21B 4400

175 39

A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specifications of proposed drilling equipment for use in the drilling of the well bore, and predicting a drilling mechanics in response to the specifications as a function of the geology characteristic per unit depth according to a prescribed drilling mechanics model. The geology characteristic includes at least rock strength. The specifications includes at least a bit specification of a recommended drill bit. Lastly, the predicted drilling mechanics include at least one of bit wear, mechanical efficiency, power, and operating parameters. A display is provided for generating a display of the geology characteristic and predicted drilling mechanics per unit depth, including either a display monitor or a printer.

7357196, Apr 15, 2008

Aug 30, 2005

11/215673

William A. Goldman - Houston TX, US
Oliver Matthews, III - Spring TX, US
William W. King - Houston TX, US
Gary E. Weaver - Conroe TX, US
Gerald L. Pruitt - Houston TX, US

Halliburton Energy Services, Inc. - Carrollton TX

E21B 47/00, E21B 44/00

175 24, 175 40, 702 9, 703 10

A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specifications of proposed drilling equipment for use in the drilling of the well bore, and predicting a drilling mechanics in response to the specifications as a function of the geology characteristic per unit depth according to a prescribed drilling mechanics model. Responsive to a predicted drilling mechanics, a controller controls a parameter in the drilling of the well bore. The geology characteristic includes at least rock strength. The specifications include at least a bit specification of a recommended drill bit. Lastly, the predicted drilling mechanics include at least one of bit wear, mechanical efficiency, power, and operating parameters. A display is provided for generating a display of the geology characteristic and predicted drilling mechanics per unit depth, including either a display monitor or a printer.

6131673, Oct 17, 2000

Mar 26, 1998

9/048360

William A. Goldman - Houston TX
Lee Morgan Smith - Houston TX

Dresser Industries, Inc.

E21B 4500

175 40

A method of assaying work of an earth boring bit of a given size and design comprises the steps of drilling a hole with the bit from an initial point to a terminal point. A plurality of electrical incremental actual force signals are generated, each corresponding to a force of the bit over a respective increment of the distance between the initial and terminal points. A plurality of electrical incremental distance signals are also generated, each corresponding to the length of the increment for a respective one of the incremental actual force signals. The incremental actual force signals and the incremental distance signals are processed to produce a value corresponding to the total work done by the bit in drilling from the initial point to the terminal point. Using such a basic work assay, a number of other downhole occurrences and/or conditions can be assayed. These include a wear rating for the type of bit, a determination of whether such a bit can drill a given interval of formation, and assessment of the abrasivity of rock drilled (which in turn can be used to modify the assays of other conditions and/or occurrences), a model of the wear of such a bit in current use, and a determination of the mechanical efficiency of the bit.

7032689, Apr 25, 2006

Jun 21, 2002

10/177829

William A. Goldman - Houston TX, US
Oliver Matthews, III - Spring TX, US
William W. King - Houston TX, US
Gary E. Weaver - Conroe TX, US
Gerald L. Pruitt - Houston TX, US

Halliburton Energy Services, Inc. - Carrollton TX

E21B 47/00, E21B 44/00

175 39, 175 40, 175 57, 702 9

A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation includes generating a geology characteristic of the formation per unit depth according to a prescribed geology model, obtaining specifications of proposed drilling equipment for use in the drilling of the well bore, and predicting a drilling mechanics in response to the specifications as a function of the geology characteristic per unit depth according to a prescribed drilling mechanics model. Responsive to a predicted-drilling mechanics, a controller controls a parameter in the drilling of the well bore. The geology characteristic includes at least rock strength. The specifications include at least a bit specification of a recommended drill bit. Lastly, the predicted drilling mechanics include at least one of bit wear, mechanical efficiency, power, and operating parameters. A display is provided for generating a display of the geology characteristic and predicted drilling mechanics per unit depth, including either a display monitor or a printer.

5767399, Jun 16, 1998

Mar 25, 1996

8/621412

Lee Morgan Smith - Houston TX
William A. Goldman - Houston TX

Dresser Industries, Inc. - Dallas TX

E21B 4902

7315211

A method of assaying the compressive strength of rock comprises testing a primary plurality of rock samples of similar lithology, at least some of which have different porosities, to determine, for each sample respectively, a value corresponding to compressive strength and a value corresponding to porosity. A first series of pairs of electrical compressive strength and porosity signals, the signals of each pair corresponding, respectively, to the compressive strength and porosity values for a respective one of the samples, is generated. These signals are processed by a computer to extrapolate additional such pairs of signals and generate a second series of electrical signals corresponding to compressive strength as a function of porosity. The second series of signals may correspond to unconfined compressive strength, and may be further processed, to generate a cumulative series of signals, using electrical adjustment signals corresponding to other conditions affecting the compressive strength of the rock. Site characteristics of the rock for a wellbore locus, at a plurality of sites along the length of the locus, and as the rock would be addressed by a drill bit, are determined.

2004005, Mar 25, 2004

Sep 23, 2003

10/668788

William Goldman - Houston TX, US
Lee Smith - Houston TX, US

Halliburton Energy Services Inc.

G06G007/48

703/007000

A method for determining bit wear in a drill bit of a drilling rig system is disclosed. The method provides a first drill bit design. The first drill bit design having a first geometry. The method also generates a geological model of given formation. The geological model including a geological characteristic based on a length of formation drilled in a given amount of time. The method predicts the first wear rate of the first drill bit design based on the first geometry compared to the geological model for the length of formation drilled.

7261167, Aug 28, 2007

Sep 23, 2003

10/669105

William A. Goldman - Houston TX, US
Oliver Matthews, III - Spring TX, US
William W. King - Houston TX, US
Gary E. Weaver - Conroe TX, US
Gerald L. Pruitt - Houston TX, US

Halliburton Energy Services, Inc. - Carrollton TX

E21B 47/00, E21B 44/00

175 39, 175 40, 175 57, 702 9, 703 10

A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation is disclosed. The method generates a geology model of a given formation. The geology model includes a geology characteristic of the given formation per unit depth. The method also determines a predicted drilling performance for a proposed drilling equipment based on the geology model and specification data of the proposed drilling equipment, wherein the specification data of the proposed drilling equipment is a function of the geology characteristic.

7035778, Apr 25, 2006

Apr 26, 2002

10/133078

William A. Goldman - Houston TX, US
Lee Morgan Smith - Houston TX, US

Halliburton Energy Services, Inc. - Carrollton TX

G06F 17/50

703 10, 703 2, 702 6, 175 40

A method of assaying work of an earth boring bit of a given size and design including establishing characteristics of the bit of given size and design. The method further includes simulating a drilling of a hole in a given formation as a function of the characteristics of the bit of given size and design and at least one rock strength of the formation. The method further includes outputting a performance characteristic of the bit, the performance characteristic including a bit wear condition and a bit mechanical efficiency determined as a function of the simulated drilling.