Schlumberger Well Surveying Corp
SchlumbergActive Patents
0
Total Holdings
58
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3390377A | Acoustical well logging methods and apparatus | Expired / Lapsed | 1967-06-06 | 1968-06-25 | 0 | Details |
| US3292729A | Velocity logging apparatus | Expired / Lapsed | 1959-12-23 | 1966-12-20 | 2 | Details |
| US3275095A | Acoustic well logging apparatus | Expired / Lapsed | 1959-09-21 | 1966-09-27 | 2 | Details |
| US3257639A | Well logging system employing average travel time computati… | Expired / Lapsed | 1961-11-29 | 1966-06-21 | 2 | Details |
| US3249124A | Borehole apparatus valves | Expired / Lapsed | 1963-06-14 | 1966-05-03 | 2 | Details |
| US3207256A | Acoustic well logging | Expired / Lapsed | 1959-09-21 | 1965-09-21 | 2 | Details |
| US3181117A | Signal processing systems | Expired / Lapsed | 1959-04-17 | 1965-04-27 | 2 | Details |
| US3102251A | Acoustic logging apparatus | Expired / Lapsed | 1959-10-30 | 1963-08-27 | 2 | Details |
| US3090910A | System for measuring by induction the conductivity of a med… | Expired / Lapsed | 1959-05-21 | 1963-05-21 | 2 | Details |
| US3050150A | Methods for investigating earth formations | Expired / Lapsed | 1959-02-10 | 1962-08-21 | 0 | Details |
| US3030021A | Computing apparatus | Expired / Lapsed | 1955-01-13 | 1962-04-17 | 0 | Details |
| US2994962A | Tubing measuring apparatus using pulse sequences | Expired / Lapsed | 1957-12-19 | 1961-08-08 | 0 | Details |
| US2979955A | Pressure responsive systems | Expired / Lapsed | 1957-04-12 | 1961-04-18 | 0 | Details |
| US2974303A | Electrical systems for borehole apparatus | Expired / Lapsed | 1957-02-08 | 1961-03-07 | 0 | Details |
| US2963583A | Well logging apparatus | Expired / Lapsed | 1955-01-17 | 1960-12-06 | 0 | Details |
| US2943694A | Method and apparatus for exploring boreholes | Expired / Lapsed | 1954-05-17 | 1960-07-05 | 0 | Details |
| US2884590A | Electrical well logging systems | Expired / Lapsed | 1956-10-16 | 1959-04-28 | 0 | Details |
| US2842852A | Memorizing system | Expired / Lapsed | 1955-03-16 | 1958-07-15 | 0 | Details |
| US2753520A | Methods and systems for maintaining alternating current net… | Expired / Lapsed | 1946-03-23 | 1956-07-03 | 0 | Details |
| US2752561A | Servomechanism control system | Expired / Lapsed | 1951-09-26 | 1956-06-26 | 1 | Details |
| US2750557A | Electrical logging of subterranean formations | Expired / Lapsed | 1954-06-04 | 1956-06-12 | 2 | Details |
| US2725713A | Cable construction | Expired / Lapsed | 1952-05-13 | 1955-12-06 | 0 | Details |
| US2725523A | Multiple coil apparatus for induction well logging | Expired / Lapsed | 1952-06-06 | 1955-11-29 | 2 | Details |
| US2723375A | Induction logging apparatus | Expired / Lapsed | 1953-03-02 | 1955-11-08 | 2 | Details |
| US2712630A | Methods and apparatus for electrical logging of wells | Expired / Lapsed | 1951-11-20 | 1955-07-05 | 0 | Details |
| US2712629A | Electrical logging of earth formations traversed by a bore … | Expired / Lapsed | 1951-03-07 | 1955-07-05 | 0 | Details |
| US2712628A | Electrical logging apparatus | Expired / Lapsed | 1951-02-19 | 1955-07-05 | 0 | Details |
| US2712627A | Electrical resistivity well logging method and apparatus | Expired / Lapsed | 1950-05-12 | 1955-07-05 | 0 | Details |
| US2669690A | Resistivity method for obtaining indications of permeable f… | Expired / Lapsed | 1949-10-18 | 1954-02-16 | 0 | Details |
| US2625583A | Magnetic induction well-logging instrument | Expired / Lapsed | 1950-10-28 | 1953-01-13 | 0 | Details |
| US2623923A | Electrostatically shielded magnetic well logging system | Expired / Lapsed | 1951-04-23 | 1952-12-30 | 0 | Details |
| US2623916A | Electrical measuring system | Expired / Lapsed | 1948-06-24 | 1952-12-30 | 0 | Details |
| US2615956A | Borehole telemetering | Expired / Lapsed | 1951-01-05 | 1952-10-28 | 0 | Details |
| US2592125A | Method and apparatus for logging static spontaneous potenti… | Expired / Lapsed | 1949-11-18 | 1952-04-08 | 0 | Details |
| US2592101A | Electrical logging | Expired / Lapsed | 1945-10-10 | 1952-04-08 | 0 | Details |
| US2550005A | Well logging method and apparatus utilizing periodically va… | Expired / Lapsed | 1948-04-22 | 1951-04-24 | 0 | Details |
| US2547876A | Apparatus for investigating a plurality of physical values … | Expired / Lapsed | 1944-01-05 | 1951-04-03 | 0 | Details |
| US2547875A | Apparatus for taking physical measurements in boreholes | Expired / Lapsed | 1936-10-29 | 1951-04-03 | 0 | Details |
| US2522522A | Shielding method and apparatus for radioactive borehole log… | Expired / Lapsed | 1941-05-03 | 1950-09-19 | 0 | Details |
| US2463252A | Frequency stabilization of alternating current networks | Expired / Lapsed | 1946-03-08 | 1949-03-01 | 0 | Details |
| US2451797A | Apparatus for producing pressure pulses in boreholes | Expired / Lapsed | 1945-02-17 | 1948-10-19 | 0 | Details |
| US2433746A | Method and apparatus for investigating earth formations tra… | Expired / Lapsed | 1942-06-13 | 1947-12-30 | 0 | Details |
| US2398761A | Method and apparatus for simultaneous determination of vari… | Expired / Lapsed | 1940-11-30 | 1946-04-23 | 0 | Details |
| US2390409A | Electrical logging | Expired / Lapsed | 1942-02-04 | 1945-12-04 | 0 | Details |
| US2363234A | Delayed action fuse | Expired / Lapsed | 1941-10-06 | 1944-11-21 | 0 | Details |
| US2357178A | Method and apparatus for investigating boreholes | Expired / Lapsed | 1939-12-13 | 1944-08-29 | 0 | Details |
| US2350832A | Electrical depth marker | Expired / Lapsed | 1941-02-21 | 1944-06-06 | 0 | Details |
| US2316942A | Apparatus for measuring temperatures in boreholes | Expired / Lapsed | 1941-05-06 | 1943-04-20 | 0 | Details |
| US2317259A | Device for determining the strata traversed by drill holes | Expired / Lapsed | 1938-02-15 | 1943-04-20 | 0 | Details |
| US2238015A | Resistance thermometer and method of manufacturing the same | Expired / Lapsed | 1937-12-27 | 1941-04-08 | 0 | Details |
| US2222608A | Electrical surveying in drill holes | Expired / Lapsed | 1937-05-17 | 1940-11-26 | 0 | Details |
| US2220070A | Method of and apparatus for magnetically exploring earth st… | Expired / Lapsed | 1936-03-24 | 1940-11-05 | 0 | Details |
| US2220788A | Method and apparatus for investigating subterranean strata … | Expired / Lapsed | 1935-06-24 | 1940-11-05 | 0 | Details |
| US2191121A | Geological surveying apparatus | Expired / Lapsed | 1940-01-05 | 1940-02-20 | 0 | Details |
| US2191119A | Method of and apparatus for surveying the formations traver… | Expired / Lapsed | 1935-05-11 | 1940-02-20 | 0 | Details |
| US2191120A | Method of geological survey | Expired / Lapsed | 1935-03-02 | 1940-02-20 | 0 | Details |
| US2170857A | Recording apparatus and method | Expired / Lapsed | 1937-12-01 | 1939-08-29 | 0 | Details |
| US2050128A | Thermometric method of locating the top of the cement behin… | Expired / Lapsed | 1934-05-24 | 1936-08-04 | 0 | Details |