Robert H. Adolph
Engineering at Creekbend Dr, Houston, TX

6648083, Nov 18, 2003

Oct 26, 2001

10/040701

Michael Evans - Missouri City TX
Richard J Radtke - Pearland TX
W Robert Sloan - Missouri City TX
Robert A Adolph - Houston TX

Schlumberger Technology Corporation - Sugar Land TX

E21B 4900

175 41, 250254, 2502694, 7315204

A method is disclosed for determining a characteristic of a mud mixture surrounding a drilling tool within a borehole in which a drilling tool is received. The method includes turning the tool in the borehole. Energy is applied into the borehole from an energy source disposed in the tool. Measurement signals are received at a sensor disposed in the tool from a location around the borehole. The cross-section of the borehole is separated into at least a first sector and a second sector. A first measurement signal from the first sector is substantially in response to returning energy which results from the interaction of the applied energy with the mud mixture. A second measurement signal from the second sector is substantially in response to returning energy which results from the interaction of the applied energy with the formation. An indication of an intrinsic characteristic of the mud mixture is derived from the first measurement signals associated with the first sector of the borehole.

6696684, Feb 24, 2004

Dec 28, 2001

10/034476

Richard J. Radtke - Pearland TX
Robert A. Adolph - Houston TX
Luca Ortenzi - Stafford TX

Schlumberger Technology Corporation - Sugar Land TX

G01V 504

2502693, 250262

A method for tool path identification in formation evaluation includes obtaining measurements of formation properties in azimuthal sectors for each of a plurality of depth levels; calculating quality factors from the measurements; identifying a centroid or maximum of the quality factors among the measurements in each of the azimuthal sectors for each depth level; and associating the centroid or maximum of the quality factors at each depth level along a borehole to form the tool path. Calculating the quality factors may include parameterizing the measurements according to at least one factor selected from a spine factor, a rib factor, and a volumetric photoelectric factor. A method for determining corrected measurements for formation properties includes identifying a tool path from measurements taken in azimuthal sectors at each depth level along a borehole; and calculating a corrected measurement at the each depth level by averaging measurements in the azimuthal sectors adjacent the tool path.

6703606, Mar 9, 2004

Aug 14, 2001

09/929680

Robert A. Adolph - Houston TX

Schlumberger Technology Corporation - Sugar Land TX

G01V 510

2502691, 2502694, 2502696, 25039001, 250391

A method is disclosed for measuring neutron interaction properties of an earth formation. The method includes irradiating the formation with bursts of high energy neutrons. The bursts have a duration selected to enable detection of short duration burst related phenomena. After at least one of the bursts, short duration burst related phenomena are measured. After a selected number of the bursts, long duration neutron burst-related phenomena are detected. In some embodiments, the short duration burst related phenomena include at least one of inelastic gamma ray related phenomena, neutron slowing down related phenomena and short capture cross section related phenomena.

6754586, Jun 22, 2004

Mar 28, 2003

10/249297

Robert A. Adolph - Houston TX

Schlumberger Technology Corporation - Sugar Land TX

G01V 5101

702 8

Techniques for monitoring a pulsed neutron source include measuring a burst count rate while the pulsed neutron source is turned on using a monitor detector disposed proximate the pulsed neutron source; measuring a decay count rate while the neutron source is turned off using the monitor detector; and deriving a source strength indicator from the burst count rate and the decay count rate. A pulsed neutron tool includes a tool body; a pulsed neutron source disposed in the tool body; a monitor detector disposed in the tool body proximate the pulsed neutron source; at least one measurement detector disposed in the tool body at a predetermined distance from the pulsed neutron source; and circuitry disposed in the tool body for controlling the pulsed neutron source, the monitor detector, and the at least one measurement detector.

6649906, Nov 18, 2003

Aug 17, 2001

09/932502

Robert A. Adolph - Houston TX
Nancy S. Borkowski - Lunenberg MA
Patrick J. Fisseler - Missouri City TX

Schlumberger Technology Corporation - Sugar Land TX

G01V 508

2502691, 2502694, 2502696

A method is disclosed for operating a well logging tool having a controllable radiation source operatively coupled to a power source. The method includes monitoring at least one condition in a wellbore, and operatively disconnecting the power source from the radiation source when the at least one condition changes. Also disclosed is a downhole measurement assembly, which includes a radiation source, a power source, and at least one interlock operatively connected between the power source and the radiation source, where the at least one interlock is adapted to selectively arm and disarm the radiation source.

7667192, Feb 23, 2010

Aug 16, 2007

11/839608

Scott H. Fricke - Houston TX, US
Robert A. Adolph - Houston TX, US
Mike Evans - Missouri City TX, US

Schlumberger Technology Corporation - Sugar Land TX

G01V 5/10

2502694, 250266

A method for determining at least one formation property calculated from neutron measurements acquired with a downhole tool includes emitting neutrons from a source in the tool into the formation, detecting neutrons with at least one detector in the downhole tool, calculating a first slowing-down length (L) based on the detected neutrons, and deriving a second slowing-down length (L) based on the first slowing-down length (L). Further steps include deriving a correlation function for relating slowing-down lengths from a first tool to slowing-down lengths associated with a different source, wherein the correlation function depends on formation properties such as bulk density; and applying the correlation function to the slowing-down length of the first tool to derive the slowing-down length of the second tool. A method for determining a thermal neutron formation porosity based on a slowing-down length from epithermal neutron measurements from an electronic neutron source includes converting the slowing-down length into a computed neutron slowing-down length from thermal neutron measurements from a chemical neutron source, wherein the converting uses a correlation function that depends on formation bulk density; deriving a thermal neutron countrate ratio based on the computed neutron slowing-down length, wherein the deriving uses a function that depends on the formation bulk density and formation sigma; and computing the thermal neutron formation porosity from the thermal neutron countrate ratio.

5105080, Apr 14, 1992

Apr 2, 1991

7/679468

Christian Stoller - Kingwood TX
Robert A. Adolph - Houston TX

Schlumberger Technology Corporation - Houston TX

G01V 510

250270

A apparatus and an apparatus for determining the respective contributions in spectroscopy measurements of the borehole and the earth formations surrounding the borehole, derived from the detection of gamma rays resulting from the collisions of neutrons with atoms of the formation or the borehole. From gamma rays from a near and far detector, and established, at each depth, responses (e. g. elemental yields) representative of the values of an unknown in the borehole and in the formation. The far detector response is plotted against the near detector response. From the plot and from known conditions of the detection, is derived a closed curve characteristic of the relative contributions of the borehole and the formation in the responses. For each depth, the respective values of the unknown are derived from the position on the plot of the couple of responses for that depth, with respect to the closed curve. For instance, on a plot of C/(C+O) yields, the curve is a parallelogram two concurrent sides of which form a coordinate system; the coordinates of each response corresponds to the values of the unknown respectively for the formation and the borehole.

5132540, Jul 21, 1992

Jun 6, 1991

7/711599

Robert A. Adolph - Houston TX
Bradley A. Roscoe - Pasadena TX

Schlumberger Technology Corporation - Houston TX

G01T 1208, G01V 500

250369

A nuclear spectroscopy method and apparatus for the analysis of a signal comprising pulses representative of random nuclear events, and for the determination of the dead time, including counting and recording, versus time, the accumulated counts of the pile-up events (PU), i. e. events identified as being characteristic of two or more overlapping events, and the counts of non pile-up events (NPU), for each of successive time intervals of a measurement cycle. Particularly the method includes: forming a preliminary reference plot of the PU count rates versus the NPU count rates; forming an actual plot corresponding to the signal under analysis, of PU count rates versus NPU count rates; and deducing the dead time from comparison between actual and reference plots. In an alternative embodiment, the method allows one to maintain constant the dead time, during the signal analysis, by: establishing a preliminary relationship between dead time and different plots of PU count rates versus NPU count rates; establishing a preliminary relationship between the plots and a functioning parameter; establishing a reference plot corresponding to an imposed dead time; establishing an actual plot; comparing the actual and reference plots; and modifying the functioning parameter so as to bring the respective actual and reference plots in compliance.

6307199, Oct 23, 2001

May 12, 1999

9/310893

John E. Edwards - Sugar Land TX
Robert A. Adolph - Houston TX
W. Robert Sloan - Missouri City TX

Schlumberger Technology Corporation

G01V 100

2502693

A system is disclosed for compensating well logs for adverse effects of the borehole and near borehole formation effects. The system is configured primarily for processing logging-while-drilling (LWD) density measurements, and includes means for generating a one-dimensional density log which is corrected for adverse effects of logging tool standoff and "dipping" beds penetrated by the borehole. The system is, however, applicable to any type of LWD or other type of logging system which requires borehole corrections, and which responds to variations in formation properties in a plane perpendicular to the borehole. The system can also be modified to include LWD apparatus using sensors that require no borehole corrections, and only require corrections for dipping beds. The system is ideally suited for logging equipment using two sensors, but can be modified for use with single sensor systems or systems using more than two sensors.

5699246, Dec 16, 1997

Sep 22, 1995

8/532133

Ronald E. Plasek - Houston TX
Christian Stoller - Kingwood TX
Robert A. Adolph - Houston TX

Schlumberger Technology Corporation - Houston TX

E21B 4900, G01V 128, G01V 130, G01V 132

364422

The present invention provides a new method to determine corrected characteristics of materials using the measured quantities obtained by a measurement and an extensive set of database points representing laboratory and modeled results in well defined environments. In particular the invention relates to the measurement of the characteristics of the formation around a wellbore as well as of the borehole with a well logging tool. Using a dynamic parametrization technique, the environmental corrections and the transformations from the measured to the physical characteristics can be achieved in a more accurate, robust and flexible way. The dynamic local parametrization is based on a weighted multiple linear regression over the entire database to obtain the local coefficients for the transformation which can be expressed as a simple equation.