Schlumberger Technology Corp
SchlumbergActive Patents
0
Total Holdings
82
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US6446718B1 | Down hole tool and method | Expired / Lapsed | 1999-11-08 | 2002-09-10 | 63 | Details |
| US5440118A | Methods and apparatus for determining formation lithology b… | Expired / Lapsed | 1994-03-31 | 1995-08-08 | 60 | Details |
| US5235185A | Formation sigma measurement from thermal neutron detection | Expired / Lapsed | 1992-01-09 | 1993-08-10 | 41 | Details |
| US5166747A | Apparatus and method for analyzing the composition of forma… | Expired / Lapsed | 1990-06-01 | 1992-11-24 | 20 | Details |
| US5119475A | Object-oriented framework for menu definition | Expired / Lapsed | 1991-08-29 | 1992-06-02 | 27 | Details |
| US5086224A | Analysis of nuclear data for determining characteristics of… | Expired / Lapsed | 1990-11-13 | 1992-02-04 | 21 | Details |
| US4972082A | Methods and apparatus for epithermal neutron logging | Expired / Lapsed | 1989-03-16 | 1990-11-20 | 63 | Details |
| US4936139A | Down hole method for determination of formation properties | Expired / Lapsed | 1989-07-10 | 1990-06-26 | 9 | Details |
| US4903527A | Quantitative clay typing and lithological evaluation of sub… | Expired / Lapsed | 1988-10-24 | 1990-02-27 | 44 | Details |
| US4896303A | Method for cementation evaluation using acoustical coupling… | Expired / Lapsed | 1988-11-17 | 1990-01-23 | 20 | Details |
| US4860581A | Down hole tool for determination of formation properties | Expired / Lapsed | 1988-09-23 | 1989-08-29 | 30 | Details |
| US4773264A | Permeability determinations through the logging of subsurfa… | Expired / Lapsed | 1986-08-18 | 1988-09-27 | 36 | Details |
| US4745550A | Processing of oriented patterns | Expired / Lapsed | 1985-08-16 | 1988-05-17 | 42 | Details |
| US4705459A | Method of observing the pumping characteristics of a positi… | Expired / Lapsed | 1985-08-19 | 1987-11-10 | 11 | Details |
| US4661701A | Methods and apparatus for borehole-corrected spectral analy… | Expired / Lapsed | 1985-07-17 | 1987-04-28 | 34 | Details |
| US4635735A | Method and apparatus for the continuous analysis of drillin… | Expired / Lapsed | 1984-07-06 | 1987-01-13 | 63 | Details |
| US4622854A | Rounded wall surface acoustic wave sensors | Expired / Lapsed | 1984-12-31 | 1986-11-18 | 34 | Details |
| US4598366A | Diffraction tomography systems and methods with arbitrary s… | Expired / Lapsed | 1984-01-25 | 1986-07-01 | 45 | Details |
| US4587424A | Method for investigating the composition of an earth format… | Expired / Lapsed | 1983-08-22 | 1986-05-06 | 56 | Details |
| US4547691A | Piezoelectric pressure and/or temperature transducer | Expired / Lapsed | 1983-08-04 | 1985-10-15 | 18 | Details |
| US4507554A | Method and apparatus for determining borehole and formation… | Expired / Lapsed | 1983-02-07 | 1985-03-26 | 21 | Details |
| US4502121A | Machine method for determining the presence and location of… | Expired / Lapsed | 1979-03-12 | 1985-02-26 | 30 | Details |
| US4495604A | Machine method for determining the presence and location of… | Expired / Lapsed | 1979-03-12 | 1985-01-22 | 85 | Details |
| US4464569A | Method and apparatus for spectroscopic analysis of a geolog… | Expired / Lapsed | 1981-06-19 | 1984-08-07 | 23 | Details |
| US4454913A | Safety valve system with retrievable equalizing feature | Expired / Lapsed | 1981-01-05 | 1984-06-19 | 20 | Details |
| US4355310A | Well logging communication system | Expired / Lapsed | 1979-08-06 | 1982-10-19 | 36 | Details |
| US4327290A | Method and apparatus for nuclear well logging with optimize… | Expired / Lapsed | 1979-11-02 | 1982-04-27 | 46 | Details |
| US4267727A | Pressure and temperature compensation means for a downhole … | Expired / Lapsed | 1979-09-21 | 1981-05-19 | 6 | Details |
| US4267726A | Well pressure testing method | Expired / Lapsed | 1979-08-23 | 1981-05-19 | 11 | Details |
| US4257903A | Drilling fluid containing crosslinked polysaccharide deriva… | Expired / Lapsed | 1978-10-19 | 1981-03-24 | 18 | Details |
| US4255798A | Method and apparatus for acoustically investigating a casin… | Expired / Lapsed | 1978-05-30 | 1981-03-10 | 93 | Details |
| US4208580A | Lithology determination from the calcium and magnesium acti… | Expired / Lapsed | 1978-12-26 | 1980-06-17 | 20 | Details |
| US4096385A | Clay content determination by natural gamma ray spectrometry | Expired / Lapsed | 1977-02-14 | 1978-06-20 | 34 | Details |
| US4055763A | Neutron characteristic and spectroscopy logging methods and… | Expired / Lapsed | 1976-05-17 | 1977-10-25 | 54 | Details |
| US4012712A | System for telemetering well logging data | Expired / Lapsed | 1975-03-31 | 1977-03-15 | 24 | Details |
| US3986163A | Methods and apparatus for recording well logging measuremen… | Expired / Lapsed | 1974-11-04 | 1976-10-12 | 91 | Details |
| US3967647A | Subsea control valve apparatus | Expired / Lapsed | 1974-04-22 | 1976-07-06 | 25 | Details |
| US3909775A | Methods and apparatus for acoustic logging through casing | Expired / Lapsed | 1973-10-26 | 1975-09-30 | 27 | Details |
| US3909603A | Method of processing production well logging data | Expired / Lapsed | 1971-08-11 | 1975-09-30 | 26 | Details |
| US3833809A | Neutron logging of formation porosity and chlorinity | Expired / Lapsed | 1973-05-09 | 1974-09-03 | 35 | Details |
| US3765488A | Well treating method | Expired / Lapsed | 1972-04-06 | 1973-10-16 | 11 | Details |
| US3731530A | Apparatus for determining the gas content of drilling muds | Expired / Lapsed | 1972-03-20 | 1973-05-08 | 23 | Details |
| US3713089A | Data-signaling apparatus ford well drilling tools | Expired / Lapsed | 1970-07-30 | 1973-01-23 | 18 | Details |
| US3707700A | Telemetry system incorporating synchromization of receiver … | Expired / Lapsed | 1969-08-21 | 1972-12-26 | 13 | Details |
| US3697937A | Acoustic reflection coefficient logging | Expired / Lapsed | 1969-07-09 | 1972-10-10 | 32 | Details |
| US3683187A | Methods and apparatus for inspecting tubular goods using a … | Expired / Lapsed | 1970-03-26 | 1972-08-08 | 17 | Details |
| US3613790A | Method of plugging a formation | Expired / Lapsed | 1969-09-24 | 1971-10-19 | 10 | Details |
| US3599156A | Methods and apparatus for transmitting data between remote … | Expired / Lapsed | 1968-02-06 | 1971-08-10 | 56 | Details |
| US3590228A | Methods and apparatus for processing well logging data | Expired / Lapsed | 1967-10-02 | 1971-06-29 | 35 | Details |
| US3577783A | Tool to take multiple fluid measurements | Expired / Lapsed | 1969-01-10 | 1971-05-04 | 11 | Details |
| US3567879A | Apparatus for facilitating the descent of cable-suspended w… | Expired / Lapsed | 1969-05-02 | 1971-03-02 | 5 | Details |
| US3566682A | Radioactivity and electrical logging tool combination | Expired / Lapsed | 1969-01-22 | 1971-03-02 | 0 | Details |
| US3564523A | Multiple track magnetic tape recording apparatus | Expired / Lapsed | 1967-11-22 | 1971-02-16 | 0 | Details |
| US3559163A | Well logging pulse transmission system | Expired / Lapsed | 1967-08-10 | 1971-01-26 | 0 | Details |
| US3546512A | Neutron generator including an ion source with a massive fe… | Expired / Lapsed | 1967-02-13 | 1970-12-08 | 0 | Details |
| US3529666A | Method of improving permeability of geologic formations by … | Expired / Lapsed | 1968-07-30 | 1970-09-22 | 0 | Details |
| US3528503A | Method of improving permeability of geologic formations by … | Expired / Lapsed | 1968-07-30 | 1970-09-15 | 0 | Details |
| US3521064A | Analysis of gamma ray energy spectrum for constituent ident… | Expired / Lapsed | 1967-02-17 | 1970-07-21 | 0 | Details |
| US3497958A | Systems and methods for determining the position of a tool … | Expired / Lapsed | 1966-05-02 | 1970-03-03 | 0 | Details |
| US3490286A | Electrical apparatus for well tools | Expired / Lapsed | 1967-08-03 | 1970-01-20 | 0 | Details |
| US3490150A | Systems and methods for determining the position of a tool … | Expired / Lapsed | 1966-05-02 | 1970-01-20 | 0 | Details |
| US3488661A | Methods and apparatus for recording well logging signals | Expired / Lapsed | 1967-12-27 | 1970-01-06 | 0 | Details |
| US3488659A | Methods and apparatus for recording well logging signals | Expired / Lapsed | 1967-12-27 | 1970-01-06 | 0 | Details |
| US3488658A | Methods and apparatus for recording well logging signals | Expired / Lapsed | 1967-12-27 | 1970-01-06 | 0 | Details |
| US3465820A | Retainer packers having a rotating valve | Expired / Lapsed | 1967-10-05 | 1969-09-09 | 0 | Details |
| US3457544A | Methods and apparatus for recording well logging data | Expired / Lapsed | 1968-02-06 | 1969-07-22 | 0 | Details |
| US3453433A | Combined sidewall neutron porosity gamma-gamma tool | Expired / Lapsed | 1966-12-08 | 1969-07-01 | 0 | Details |
| US3449755A | Apparatus for recording well logging signals | Expired / Lapsed | 1967-12-27 | 1969-06-10 | 0 | Details |
| US3445805A | Electrical connector | Expired / Lapsed | 1967-05-18 | 1969-05-20 | 0 | Details |
| US3437834A | Circuit for detecting time of occurrence of signals having … | Expired / Lapsed | 1965-08-27 | 1969-04-08 | 0 | Details |
| US3434105A | Well logging systems | Expired / Lapsed | 1967-03-02 | 1969-03-18 | 0 | Details |
| US3415319A | Fluid loss control of acidic solutions | Expired / Lapsed | 1966-09-06 | 1968-12-10 | 0 | Details |
| US3406359A | Methods and apparatus for computing a function of sampled w… | Expired / Lapsed | 1965-12-15 | 1968-10-15 | 0 | Details |
| US3402601A | Tension measuring device | Expired / Lapsed | 1965-10-28 | 1968-09-24 | 0 | Details |
| US3401773A | Method and apparatus for cement logging of cased boreholes | Expired / Lapsed | 1967-12-04 | 1968-09-17 | 0 | Details |
| US3400257A | Arithmetic operations using two or more digital-to-analog c… | Expired / Lapsed | 1964-10-05 | 1968-09-03 | 0 | Details |
| US3396448A | Methods for manufacture of flexible valve elements | Expired / Lapsed | 1965-09-29 | 1968-08-13 | 0 | Details |
| US3388375A | Magnetic tape recording methods and apparatus for well logg… | Expired / Lapsed | 1965-10-26 | 1968-06-11 | 0 | Details |
| US3332495A | Full-opening well tools | Expired / Lapsed | 1965-02-25 | 1967-07-25 | 1 | Details |
| US3333237A | Acoustic well logging display methods and apparatus | Expired / Lapsed | 1964-08-25 | 1967-07-25 | 4 | Details |
| US3329931A | Methods and systems for recording and processing well loggi… | Expired / Lapsed | 1962-12-20 | 1967-07-04 | 2 | Details |
| US3327784A | Apparatus for releasably connecting well tools to a support… | Expired / Lapsed | 1964-12-11 | 1967-06-27 | 1 | Details |