US1819923A
(en)
|
1928-10-26 |
1931-08-18 |
Schlumberger Prospection |
Electrical process and apparatus for the determination of the nature of the geological formations traversed by drill holes
|
US1913293A
(en)
|
1931-09-02 |
1933-06-06 |
Schlumberger Conrad |
Electrical process for the geological investigation of the porous strata traversed by drill holes
|
US2476137A
(en)
|
1942-05-16 |
1949-07-12 |
Schlumberger Well Surv Corp |
Method of positioning apparatus in boreholes
|
US2524031A
(en)
|
1945-10-01 |
1950-10-03 |
Jan J Arps |
Apparatus for logging wells
|
US2573137A
(en)
|
1950-04-21 |
1951-10-30 |
Halliburton Oil Well Cementing |
Electric well logging system
|
US2677790A
(en)
|
1951-12-05 |
1954-05-04 |
Jan J Arps |
Borehole logging by intermittent signaling
|
US3058532A
(en)
|
1953-07-15 |
1962-10-16 |
Dresser Ind |
Drill bit condition indicator and signaling system
|
US2925251A
(en)
|
1954-03-05 |
1960-02-16 |
Jan J Arps |
Earth well borehole drilling and logging system
|
US3345867A
(en)
|
1964-09-03 |
1967-10-10 |
Arps Corp |
Method and apparatus for measuring rock bit wear while drilling
|
US3455158A
(en)
|
1967-11-29 |
1969-07-15 |
Texaco Inc |
Logging while drilling system
|
US4095865A
(en)
|
1977-05-23 |
1978-06-20 |
Shell Oil Company |
Telemetering drill string with piped electrical conductor
|
US4216536A
(en)
|
1978-10-10 |
1980-08-05 |
Exploration Logging, Inc. |
Transmitting well logging data
|
US4445578A
(en)
|
1979-02-28 |
1984-05-01 |
Standard Oil Company (Indiana) |
System for measuring downhole drilling forces
|
US4324297A
(en)
|
1980-07-03 |
1982-04-13 |
Shell Oil Company |
Steering drill string
|
US4455278A
(en)
|
1980-12-02 |
1984-06-19 |
Skf Industrial Trading & Development Company, B.V. |
Method for producing an object on which an exterior layer is applied by thermal spraying and object, in particular a drill bit, obtained pursuant to this method
|
ZA823430B
(en)
|
1981-05-22 |
1983-03-30 |
Coal Industry Patents Ltd |
Drill pipe sections
|
US4346591A
(en)
|
1981-08-21 |
1982-08-31 |
Evans Robert F |
Sensing impending sealed bearing and gage failure
|
US4445734A
(en)
|
1981-12-04 |
1984-05-01 |
Hughes Tool Company |
Telemetry drill pipe with pressure sensitive contacts
|
FR2530876A1
(fr)
|
1982-07-21 |
1984-01-27 |
Inst Francais Du Petrole |
Ensemble permettant une liaison electrique a travers une conduite formee de plusieurs elements
|
US4518888A
(en)
|
1982-12-27 |
1985-05-21 |
Nl Industries, Inc. |
Downhole apparatus for absorbing vibratory energy to generate electrical power
|
US4697650A
(en)
*
|
1984-09-24 |
1987-10-06 |
Nl Industries, Inc. |
Method for estimating formation characteristics of the exposed bottomhole formation
|
US4599904A
(en)
*
|
1984-10-02 |
1986-07-15 |
Nl Industries, Inc. |
Method for determining borehole stress from MWD parameter and caliper measurements
|
US4662458A
(en)
|
1985-10-23 |
1987-05-05 |
Nl Industries, Inc. |
Method and apparatus for bottom hole measurement
|
US4788544A
(en)
|
1987-01-08 |
1988-11-29 |
Hughes Tool Company - Usa |
Well bore data transmission system
|
US4884071A
(en)
|
1987-01-08 |
1989-11-28 |
Hughes Tool Company |
Wellbore tool with hall effect coupling
|
US4903245A
(en)
|
1988-03-11 |
1990-02-20 |
Exploration Logging, Inc. |
Downhole vibration monitoring of a drillstring
|
US4914433A
(en)
|
1988-04-19 |
1990-04-03 |
Hughes Tool Company |
Conductor system for well bore data transmission
|
US4829489A
(en)
|
1988-06-01 |
1989-05-09 |
Western Atlas International, Inc. |
Method of determining drill string velocity
|
GB2228326B
(en)
|
1988-12-03 |
1993-02-24 |
Anadrill Int Sa |
Method for determining the instantaneous rotation speed of a drill string
|
US4958517A
(en)
|
1989-08-07 |
1990-09-25 |
Teleco Oilfield Services Inc. |
Apparatus for measuring weight, torque and side force on a drill bit
|
US5058077A
(en)
|
1990-10-09 |
1991-10-15 |
Baroid Technology, Inc. |
Compensation technique for eccentered MWD sensors
|
US5091644A
(en)
|
1991-01-15 |
1992-02-25 |
Teleco Oilfield Services Inc. |
Method for analyzing formation data from a formation evaluation MWD logging tool
|
US5160925C1
(en)
|
1991-04-17 |
2001-03-06 |
Halliburton Co |
Short hop communication link for downhole mwd system
|
US5313829A
(en)
|
1992-01-03 |
1994-05-24 |
Atlantic Richfield Company |
Method of determining drillstring bottom hole assembly vibrations
|
FR2688026B1
(fr)
|
1992-02-27 |
1994-04-15 |
Institut Francais Petrole |
Systeme et methode d'acquisition de donnees physiques liees a un forage en cours.
|
US5923167A
(en)
|
1992-07-30 |
1999-07-13 |
Schlumberger Technology Corporation |
Pulsed nuclear magnetism tool for formation evaluation while drilling
|
US5705927A
(en)
|
1992-07-30 |
1998-01-06 |
Schlumberger Technology Corporation |
Pulsed nuclear magnetism tool for formation evaluation while drilling including a shortened or truncated CPMG sequence
|
US5629623A
(en)
|
1992-07-30 |
1997-05-13 |
Schlumberger Technology Corporation |
Pulsed nuclear magnetism tool for formation evaluation while drilling
|
FR2700806B1
(fr)
|
1993-01-27 |
1995-03-17 |
Elf Aquitaine |
Procédé de détermination des variations de la morphologie d'un puits de forage.
|
US5720355A
(en)
|
1993-07-20 |
1998-02-24 |
Baroid Technology, Inc. |
Drill bit instrumentation and method for controlling drilling or core-drilling
|
BE1007274A5
(fr)
|
1993-07-20 |
1995-05-09 |
Baroid Technology Inc |
Procede de commande de la tete d'un dispositif de forage ou de carottage et installation pour la mise en oeuvre de ce procede.
|
US5358059A
(en)
*
|
1993-09-27 |
1994-10-25 |
Ho Hwa Shan |
Apparatus and method for the dynamic measurement of a drill string employed in drilling
|
US5511037A
(en)
|
1993-10-22 |
1996-04-23 |
Baker Hughes Incorporated |
Comprehensive method of processing measurement while drilling data from one or more sensors
|
FR2713700B1
(fr)
|
1993-12-08 |
1996-03-15 |
Inst Francais Du Petrole |
Méthode et système de contrôle de la stabilité de la vitesse de rotation d'un outil de forage.
|
US5473158A
(en)
|
1994-01-14 |
1995-12-05 |
Schlumberger Technology Corporation |
Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole
|
US5475309A
(en)
|
1994-01-21 |
1995-12-12 |
Atlantic Richfield Company |
Sensor in bit for measuring formation properties while drilling including a drilling fluid ejection nozzle for ejecting a uniform layer of fluid over the sensor
|
FR2720439B1
(fr)
|
1994-05-24 |
1996-07-05 |
Inst Francais Du Petrole |
Méthode et système d'analyse du comportement d'une garniture de forage.
|
FR2720440B1
(fr)
|
1994-05-24 |
1996-07-05 |
Inst Francais Du Petrole |
Méthode et système de transmission d'un signal de forage.
|
NO315670B1
(no)
|
1994-10-19 |
2003-10-06 |
Anadrill Int Sa |
Fremgangsmåte og anordning for måling av boretilstander ved kombinasjon avnedihulls- og overflatemålinger
|
US5581024A
(en)
|
1994-10-20 |
1996-12-03 |
Baker Hughes Incorporated |
Downhole depth correlation and computation apparatus and methods for combining multiple borehole measurements
|
US5842149A
(en)
|
1996-10-22 |
1998-11-24 |
Baker Hughes Incorporated |
Closed loop drilling system
|
DE69635694T2
(de)
|
1995-02-16 |
2006-09-14 |
Baker-Hughes Inc., Houston |
Verfahren und Vorrichtung zum Erfassen und Aufzeichnen der Einsatzbedingungen eines Bohrmeissels während des Bohrens
|
FR2732403B1
(fr)
|
1995-03-31 |
1997-05-09 |
Inst Francais Du Petrole |
Methode et systeme de prediction de l'apparition d'un dysfonctionnement en cours de forage
|
US5899958A
(en)
|
1995-09-11 |
1999-05-04 |
Halliburton Energy Services, Inc. |
Logging while drilling borehole imaging and dipmeter device
|
US5740036A
(en)
|
1995-09-15 |
1998-04-14 |
Atlantic Richfield Company |
Method and apparatus for analyzing geological data using wavelet analysis
|
US5748471A
(en)
|
1996-03-29 |
1998-05-05 |
Otatco, Inc. |
Well collar identification method
|
US5767674A
(en)
|
1996-04-17 |
1998-06-16 |
Griffin; Douglas D. |
Apparatus for protecting a magnetic resonance antenna
|
US5947213A
(en)
|
1996-12-02 |
1999-09-07 |
Intelligent Inspection Corporation |
Downhole tools using artificial intelligence based control
|
WO1998017894A2
(en)
|
1996-10-22 |
1998-04-30 |
Baker Hughes Incorporated |
Drilling system with integrated bottom hole assembly
|
US6081116A
(en)
|
1997-04-21 |
2000-06-27 |
Baker Hughes Incorporated |
Nuclear magnetic resonance apparatus and method for geological applications
|
US5883583A
(en)
|
1997-07-16 |
1999-03-16 |
Schlumberger Technology Corporation |
Imaging a completion string in a wellbore
|
US5987385A
(en)
|
1997-08-29 |
1999-11-16 |
Dresser Industries, Inc. |
Method and apparatus for creating an image of an earth borehole or a well casing
|
US6057784A
(en)
|
1997-09-02 |
2000-05-02 |
Schlumberger Technology Corporatioin |
Apparatus and system for making at-bit measurements while drilling
|
US5886303A
(en)
|
1997-10-20 |
1999-03-23 |
Dresser Industries, Inc. |
Method and apparatus for cancellation of unwanted signals in MWD acoustic tools
|
US6111408A
(en)
|
1997-12-23 |
2000-08-29 |
Numar Corporation |
Nuclear magnetic resonance sensing apparatus and techniques for downhole measurements
|
US6268726B1
(en)
|
1998-01-16 |
2001-07-31 |
Numar Corporation |
Method and apparatus for nuclear magnetic resonance measuring while drilling
|
US6023164A
(en)
|
1998-02-20 |
2000-02-08 |
Numar Corporation |
Eccentric NMR well logging apparatus and method
|
US6205851B1
(en)
*
|
1998-05-05 |
2001-03-27 |
Baker Hughes Incorporated |
Method for determining drill collar whirl in a bottom hole assembly and method for determining borehole size
|
US6065219A
(en)
|
1998-06-26 |
2000-05-23 |
Dresser Industries, Inc. |
Method and apparatus for determining the shape of an earth borehole and the motion of a tool within the borehole
|
US6158529A
(en)
|
1998-12-11 |
2000-12-12 |
Schlumberger Technology Corporation |
Rotary steerable well drilling system utilizing sliding sleeve
|
US6109372A
(en)
|
1999-03-15 |
2000-08-29 |
Schlumberger Technology Corporation |
Rotary steerable well drilling system utilizing hydraulic servo-loop
|