| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 02/10/1993 | EP0526619A1 Method for automatically monitoring the vibrational condition of a drill string. |
| 02/09/1993 | US5184692 Retrievable radiation source carrier |
| 02/09/1993 | US5184682 Device allowing measurements or interventions to be carried out in a well, method using the device and applications of the device |
| 02/09/1993 | US5184507 Surface hydraulic pump/well performance analysis method |
| 02/04/1993 | WO1993002289A1 Pump control using calculated downhole dynagraph information |
| 02/04/1993 | WO1993002210A1 Apparatus and methods for preserving, transporting, storing, re-hydrating and delivering viable microorganisms |
| 02/03/1993 | EP0526294A1 System for carrying out measurements or interventions in a drilled well or while drilling |
| 02/03/1993 | EP0526246A2 Data transmission along a borehole |
| 02/03/1993 | EP0525698A2 Device for collecting measurement samples |
| 02/03/1993 | CA2075076A1 System and support for taking measurements in a bored well, and uses of same |
| 02/02/1993 | US5183113 Down-hole decelerators |
| 02/02/1993 | US5182946 Portable well analyzer |
| 02/01/1993 | CA2075130A1 Data transmission |
| 01/26/1993 | US5182731 Well bore data transmission apparatus |
| 01/26/1993 | US5182730 Method and apparatus for transmitting information in a borehole employing signal discrimination |
| 01/26/1993 | US5182516 Moling system including transmitter-carrying mole for detecting and displaying the roll angle of the mole |
| 01/26/1993 | US5182051 Raioactive tracing with particles |
| 01/26/1993 | CA1313129C Logging of subterranean wells using coiled tubing |
| 01/21/1993 | WO1993001391A1 Method and device for evaluating the production quality of a well, particularly an oil well |
| 01/19/1993 | US5181172 Method for predicting drillstring sticking |
| 01/19/1993 | CA1312966C Method of radioactive well logging |
| 01/19/1993 | CA1312937C Method of controlling the direction of a drill bit in a borehole |
| 01/19/1993 | CA1312832C Electrical conductor arrangements for pipe system |
| 01/12/1993 | US5179541 Acoustic borehole televiewer |
| 01/12/1993 | US5178214 Restriction sub with deformable plastic sleeve |
| 01/12/1993 | US5178006 Well velocity logging |
| 01/07/1993 | WO1993000597A1 System for multidirectional information transmission between at least two units of a drilling assembly |
| 01/05/1993 | US5177241 Synthesis of 1,2-dioxetanes and intermediates therefor |
| 01/05/1993 | US5176406 Coupling |
| 01/05/1993 | US5176207 Underground instrumentation emplacement system |
| 01/05/1993 | CA1312215C Probe for optically monitoring progress of in-situ vitrification of soil |
| 12/30/1992 | EP0520733A1 Steerable rotary drilling system |
| 12/30/1992 | CN2126311U Well-testing apparatus |
| 12/29/1992 | US5175429 Stand-off compensation for nuclear MWD measurement |
| 12/29/1992 | US5174161 Measuring a change in pressure of a well testing pipe |
| 12/29/1992 | US5174033 For determining an orientation of a member |
| 12/29/1992 | CA1312072C Downhole drilling assembly orienting device |
| 12/23/1992 | WO1992022833A1 Method and apparatus for detecting boundary stratum |
| 12/23/1992 | EP0519809A1 Method for analysing flowing two phase fluids in an oil well |
| 12/23/1992 | EP0519675A1 Method and apparatus for correcting measurement-while-drilling porosity |
| 12/23/1992 | CN2125699U Frost-proof solidifying-proof device of pressure gauge |
| 12/22/1992 | US5172591 Oil well sucker rod load measurement |
| 12/22/1992 | US5172480 Borehole deviation monitor |
| 12/19/1992 | CA2071409A1 Method and apparatus for correcting mwd porosity measurement |
| 12/16/1992 | CN1019519B Load regulate telemetry and its device |
| 12/16/1992 | CN1019518B Testing instrument for measuring water content of oil layer in oil wells |
| 12/15/1992 | US5172112 Subsea well pressure monitor |
| 12/15/1992 | CA1311372C Method and apparatus for controlled directional drilling of boreholes |
| 12/15/1992 | CA1311370C Apparatus and method for measuring differential pressure while drilling |
| 12/10/1992 | WO1992021848A1 Method and apparatus for determining path orientation of a passageway |
| 12/10/1992 | DE4217962A1 Data transmission method for earth boring machinery - uses conductive fluid as transmission medium contained in hose surrounding transmitter |
| 12/09/1992 | EP0517329A1 Hollow auger for casting piles in situ, and drilling device including at least two such augers |
| 12/09/1992 | CN1019407B Method of determing depth of hydraulic fracture zone in earth |
| 12/08/1992 | US5168942 For measuring earth formation while drilling in an earth formation |
| 12/08/1992 | US5168932 Detecting outflow or inflow of fluid in a wellbore |
| 12/08/1992 | US5168927 Method utilizing spot tracer injection and production induced transport for measurement of residual oil saturation |
| 12/01/1992 | US5167490 Method of calibrating a well pumpoff controller |
| 12/01/1992 | US5167278 Well testing apparatus |
| 12/01/1992 | US5167149 Apparatus and method for detecting the presence of gas in a borehole flow stream |
| 12/01/1992 | CA1310843C Method and apparatus for determining oil content of oil well production |
| 11/26/1992 | WO1992020995A1 Apparatus for measuring the profile of a moving object |
| 11/26/1992 | WO1992014905A3 Device for the precise directional control of capping bores |
| 11/25/1992 | CN2122934U High-frequency electromagnetic oscillating water-holding ratio instrument |
| 11/24/1992 | US5166908 Piezoelectric transducer for high speed data transmission and method of operation |
| 11/24/1992 | US5166747 Apparatus and method for analyzing the composition of formation fluids |
| 11/24/1992 | US5165492 Apparatus for preventing separation of a down-hole motor from a drill string |
| 11/24/1992 | US5165490 Boring tool having electromagnetic wave generation capability |
| 11/24/1992 | US5165275 Compensated gamma ray mudlog |
| 11/21/1992 | CA2069057A1 Downhole reeled tubing inspection system with fiberoptic cable |
| 11/21/1992 | CA2069047A1 Reeled tubing support for downhole equipment module |
| 11/19/1992 | EP0513844A1 Operating assembly for a multi-mode testing tool |
| 11/19/1992 | EP0513718A2 Signal detection device for borehole televiewer |
| 11/19/1992 | EP0513296A1 Device for the assembly or disassembly of probes in process pipes, tanks, etc. |
| 11/17/1992 | US5164591 Radioactive tracer well logging utilizing bromine |
| 11/17/1992 | US5164548 Method and apparatus for ultrasonic scanning of a borehole having improved sensor array and timing circuit |
| 11/17/1992 | US5163714 Electronically-nonconducting system for the connection of metal tubular elements, especially suitable for use as an antenna framework located at great depth |
| 11/17/1992 | US5163521 System for drilling deviated boreholes |
| 11/17/1992 | US5163520 Apparatus and method for steering a pipe jacking head |
| 11/17/1992 | US5163514 Blowout preventer isolation test tool |
| 11/17/1992 | US5163321 Borehole pressure and temperature measurement system |
| 11/12/1992 | WO1992019839A1 Method and device for increasing signal transmission rates on multifunction downhole cables |
| 11/11/1992 | EP0512063A1 Apparatus for inductively coupling signals between a downhole sensor and the surface |
| 11/11/1992 | CN1066100A Drill centre coordinates real-time measurement during drilling of big driller |
| 11/10/1992 | US5163029 Method for detection of influx gas into a marine riser of an oil or gas rig |
| 11/10/1992 | CA1310140C Use of tracers to monitor in situ miscibility of solvent in oil reservoirs during eor |
| 11/10/1992 | CA1310139C Method for determining residual oil saturation of a watered-out reservoir |
| 11/04/1992 | EP0511915A1 Method and apparatus for increasing the transmission rates of signals in multi-function borehole cables |
| 11/04/1992 | EP0511243A1 A gas detection system |
| 11/03/1992 | US5160925 Short hop communication link for downhole mwd system |
| 11/03/1992 | US5159978 Connecting apparatus for logging tools including electrical feedthrough and isolation system with bridle assembly |
| 11/03/1992 | US5159833 Determining connectivity between wells within a reservoir |
| 11/03/1992 | US5159832 Indicating device |
| 10/29/1992 | WO1992018882A1 Short hop communication link for downhole mwd system |
| 10/27/1992 | US5159578 Apparatus for rotating a transducer assembly of a borehole logging tool in a deviated borehole |
| 10/27/1992 | US5159577 Method of monitoring downhole conditions |
| 10/27/1992 | US5159569 Formation evaluation from thermal properties |
| 10/27/1992 | US5159226 Torsional force transducer and method of operation |
| 10/21/1992 | EP0340280A4 Self-propelled subsoil penetrating tool system |
| 10/21/1992 | CN1018749B Method of managing prodn. well |
| 10/20/1992 | US5157331 Enhanced wide aperture groove for antenna of downhole resistivity tool |