| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 10/26/1993 | US5256572 Method for determining residual oil saturation of a watered-out reservoir |
| 10/26/1993 | CA1323691C Electrically-nonconducting system for the connection of metal tubular elements, especially suitable for use as an antenna framework located at great depth |
| 10/19/1993 | US5255245 Total field imaging probe |
| 10/19/1993 | US5253714 Well service tool |
| 10/15/1993 | CA2235969A1 Method of operating a downhole shut-in tool |
| 10/15/1993 | CA2235956A1 Method of automatically controlled sampling of well fluid from a well |
| 10/15/1993 | CA2235954A1 A controller for a downhole apparatus |
| 10/15/1993 | CA2235949A1 Mechanical actuator for a downhole tool |
| 10/14/1993 | WO1993020462A1 Mud pulse pressure signal generator |
| 10/13/1993 | EP0565323A1 Borehole stressed packer inflation system |
| 10/13/1993 | EP0565141A2 Acoustic data transmission through a drill string |
| 10/12/1993 | US5253271 Method and apparatus for quadrature amplitude modulation of digital data using a finite state machine |
| 10/12/1993 | US5252832 Method of using thermal neutrons to evaluate gravel pack slurry |
| 10/12/1993 | US5252031 Monitoring and pump-off control with downhole pump cards |
| 10/12/1993 | US5251708 Modular connector for measurement-while-drilling tool |
| 10/12/1993 | US5251493 Load cell for well tubulars or the like |
| 10/12/1993 | US5251479 Downhole wellbore tool for measuring flow parameters |
| 10/12/1993 | CA2010398C Method to improve directional survey accuracy |
| 10/09/1993 | CA2065576A1 Method of determining well bore fluid gradients |
| 10/05/1993 | US5250806 Stand-off compensated formation measurements apparatus and method |
| 09/30/1993 | WO1993019296A1 Method and apparatus for controlling the operation of a pumpjack |
| 09/29/1993 | EP0562148A1 Apparatus for guiding and steering earth boring casing |
| 09/29/1993 | EP0562147A1 Directional drilling system with eccentric mounted motor and biaxial sensor |
| 09/29/1993 | CN1076759A Siren for gush-out, leakage, gas infusion of drillng liquor |
| 09/28/1993 | US5249161 Methods and apparatus for preventing jamming of encoder of logging while drilling tool |
| 09/28/1993 | CA1322587C Method for recording multi-phase flows through a transport system |
| 09/21/1993 | US5246861 Use of nonradioactive complex metal anion as tracer in subterranean reservoirs |
| 09/21/1993 | US5246273 Method and apparatus for solution mining |
| 09/21/1993 | US5246070 Piping for the completion of a groundwater monitoring site |
| 09/16/1993 | WO1993018277A1 A tractor for advancing processing and measuring equipment in a borehole |
| 09/14/1993 | US5244050 Rock bit with offset tool port |
| 09/14/1993 | US5244040 Method and apparatus to determine wellhead level |
| 09/08/1993 | EP0559497A1 Method of evalulating gravel pack slurry using thermal neutrons |
| 09/08/1993 | EP0558674A1 Pipeline pig and method of pipeline inspection. |
| 09/08/1993 | EP0558534A1 Well completion system |
| 09/07/1993 | US5243562 Method and equipment for acoustic wave prospecting in producing wells |
| 09/07/1993 | US5243337 Process and device for optimizing signal transmission rates on multifunctional well cables |
| 09/07/1993 | US5243190 Radioactive tracing with particles |
| 09/07/1993 | US5242025 Guided oscillatory well path drilling by seismic imaging |
| 09/07/1993 | US5242020 Method for deploying extendable arm for formation evaluation MWD tool |
| 09/07/1993 | CA2091125A1 Method of using thermal neutrons to evaluate gravel pack slurry |
| 09/01/1993 | EP0558379A1 System and method for physical data acquisition during drilling |
| 09/01/1993 | CN1021985C Well-head projectile connector used in oil well logging |
| 08/31/1993 | US5240350 Apparatus for detecting position of underground excavator and magnetic field producing cable |
| 08/31/1993 | US5240082 Rotary boring machine |
| 08/25/1993 | CN2140955Y Electrolytic model measuring device |
| 08/24/1993 | US5237863 Method for detecting pump-off of a rod pumped well |
| 08/24/1993 | US5237857 Down-hole liquid detecting apparatus |
| 08/18/1993 | EP0556114A1 Logging method and apparatus for investigating geometrical characteristics of a borehole |
| 08/17/1993 | US5237594 Nuclear activation method and apparatus for detecting and quantifying earth elements |
| 08/17/1993 | US5237540 Logging while drilling tools utilizing magnetic positioner assisted phase shifts |
| 08/17/1993 | US5236048 Apparatus and method for communicating electrical signals in a well, including electrical coupling for electric circuits therein |
| 08/17/1993 | US5236040 Method for determining the minimum principle horizontal stress within a formation through use of a wireline retrievable circumferential acoustic scanning tool during an open hole microfrac test |
| 08/05/1993 | WO1993015421A1 Method and apparatus for acoustic shear wave logging |
| 08/05/1993 | WO1993015306A1 A subsurface well tool actuator |
| 08/05/1993 | DE4202138A1 CCD Camera for inspection of well shaft walls - has frame forming camera guide carriage with star formation of roller cages |
| 08/04/1993 | EP0553908A2 Method of and apparatus for making near-bit measurements while drilling |
| 08/04/1993 | CN2139626Y Eight arm double well diameter measuring instrument |
| 08/03/1993 | US5233568 Method of estimating shale fraction |
| 08/03/1993 | US5233304 Electromagnetic source integrated into an element of a well casing |
| 08/03/1993 | US5231874 Buffer arrangement with back flushing of a quartz pressure transducer in a formation testing device |
| 08/01/1993 | CA2088416A1 Measurement of borehole ellipticity with a dual spaced neutron tool |
| 07/28/1993 | EP0552833A1 Sonic vibration telemetering system |
| 07/28/1993 | EP0491841A4 Pore pressure prediction method |
| 07/27/1993 | US5230607 Method and apparatus for controlling the operation of a pumpjack |
| 07/27/1993 | US5230387 Downhole combination tool |
| 07/27/1993 | US5230386 Method for drilling directional wells |
| 07/27/1993 | US5230250 Capacitor and pressure transducer |
| 07/21/1993 | EP0552087A2 Apparatus and method for retrieving and/or communicating with downhole equipment |
| 07/20/1993 | US5229552 Method and apparatus for the downhole measurement of elastic rock properties |
| 07/14/1993 | EP0550521A1 Transmission of data in boreholes. |
| 07/13/1993 | US5226494 Subsurface well apparatus |
| 07/13/1993 | US5226333 Deep-well thermal flowmeter |
| 07/13/1993 | US5226332 Vibration monitoring system for drillstring |
| 07/13/1993 | CA1320123C Analyzing a hydrocarbon reservoir by determining the response of that reservoir to tidal forces |
| 07/08/1993 | WO1993013399A1 Audio torque indicator |
| 07/08/1993 | WO1993013315A1 Pump-off control by integrating a portion of the area of a dynagraph |
| 07/07/1993 | EP0550254A2 Method of determining drillstring bottom hole assembly vibrations |
| 07/07/1993 | CN2137714Y Measuring instrument for oil well |
| 07/07/1993 | CN2137713Y Method and apparatus for measuring moving liquid-level recovering regularity of oil well |
| 07/06/1993 | US5225674 Method of delineating naturally fractured intervals in subterranean formations |
| 07/06/1993 | US5224837 Apparatus for recovery of liquid hydrocarbon |
| 07/06/1993 | US5224834 Pump-off control by integrating a portion of the area of a dynagraph |
| 07/06/1993 | CA1320007C Method for determining residual oil saturation of a gas-saturated reservoir |
| 07/04/1993 | CA2084142A1 Method of determining drillstring bottom hole assembly vibrations |
| 07/01/1993 | DE4212483C1 Laser beam arrangement for monitoring and controlling travel direction - of machines in underground mining and tunnel construction |
| 06/30/1993 | EP0549419A2 Method and apparatus for hydraulic isolation determination |
| 06/29/1993 | US5222867 Method and system for controlling a mechanical pump to monitor and optimize both reservoir and equipment performance |
| 06/29/1993 | CA1319527C Bore hole scanner with position detecting device and light polarizers |
| 06/24/1993 | WO1993012443A1 Active and/or passive monitoring system for an underground deposit by using fixed units |
| 06/24/1993 | WO1993012319A1 System for controlled drilling of boreholes along planned profile |
| 06/24/1993 | WO1993012318A1 System for controlled drilling of boreholes along planned profile |
| 06/23/1993 | EP0547961A1 Active or passive surveillance system for underground formation by means of fixed stations |
| 06/22/1993 | US5222049 Electromechanical transducer for acoustic telemetry system |
| 06/22/1993 | US5222048 Method for determining borehole fluid influx |
| 06/22/1993 | US5220963 System for controlled drilling of boreholes along planned profile |
| 06/21/1993 | CA2085393A1 Metering of two-phase fluids using flow homogenizing devices and chemicals |
| 06/16/1993 | EP0546892A1 Method and device for electrically interconnecting apparatuses such as wellbore probes |
| 06/16/1993 | EP0546805A1 Apparatus for communicating electrical signals in a well |
| 06/16/1993 | EP0546157A1 Method and device for evaluating the production quality of a well, particularly an oil well |