| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 10/30/1984 | CA1176871A1 Electronic temperature sensor |
| 10/24/1984 | EP0122839A1 Method and apparatus for conducting logging and/or work-over operations in a borehole |
| 10/24/1984 | EP0122823A1 Automatic compensating device for the magnetic effect of drill collars |
| 10/23/1984 | US4479204 In a mineral recovery program |
| 10/23/1984 | US4478069 Flow resistivity instrument in the earth |
| 10/17/1984 | EP0121802A2 Tooth configuration for an earth boring bit |
| 10/16/1984 | US4477230 Continuous pressure and temperature readout for submersible pumps |
| 10/16/1984 | US4476716 Methods for locating oil or gas deposits employing temperature and/or geothermal gradient measurements |
| 10/10/1984 | EP0121329A2 Downhole well tool |
| 10/09/1984 | US4475605 Turbodrill |
| 10/09/1984 | US4475591 Method for completing and monitoring a well |
| 10/09/1984 | US4475386 Borehole gravimetry system |
| 10/03/1984 | EP0120641A2 Fluorocarbon tracers and tracing method |
| 10/03/1984 | EP0120622A2 Placement and retrieval of downhole gauges |
| 10/03/1984 | EP0120151A1 A method of determining the length of a string of well production tubing |
| 10/03/1984 | EP0120091A1 Apparatus and method for logging wells while drilling |
| 10/02/1984 | US4474250 Measuring while drilling |
| 10/02/1984 | US4474055 Hydrostatic pipe testing apparatus |
| 10/02/1984 | US4474049 Meter proving method |
| 10/02/1984 | CA1175413A1 Mud by-pass regulator apparatus for measurement while drilling system |
| 10/02/1984 | CA1175412A1 Insulated drill collar gap sub assembly for a toroidal coupled telemetry system |
| 09/25/1984 | US4473117 In an underground reservoir |
| 09/25/1984 | CA1175146A1 Well mapping system and method with sensor output compensation |
| 09/18/1984 | US4472680 Circuit for processing electrical signals generated by a casing collar indicator instrument |
| 09/18/1984 | US4471841 Pressure balanced valve |
| 09/18/1984 | US4471533 Well mapping system and method with sensor output compensation |
| 09/11/1984 | CA1174279A1 Point gap assembly for a toroidal coupled telemetry system |
| 09/11/1984 | CA1174230A1 Turbodrill |
| 09/11/1984 | CA1174073A1 Methods and apparatus for well investigation and development |
| 09/04/1984 | US4468967 Acoustic plug release indicator |
| 09/04/1984 | US4468959 Method and apparatus for tallying pipe |
| 09/04/1984 | US4468952 Hydraulic pipe testing tool with combined anti-extrusion and anchor means |
| 09/04/1984 | US4468863 High speed well surveying |
| 08/28/1984 | US4468762 Telemetry equipment in modules |
| 08/28/1984 | US4468665 Downhole digital power amplifier for a measurements-while-drilling telemetry system |
| 08/28/1984 | US4467526 Inclination instrument |
| 08/28/1984 | CA1173350A1 Apparatus for preventing differential sticking in wells |
| 08/22/1984 | EP0116244A1 Method and apparatus for fracture detection along surfaces and boreholes by means of ultrasonic echography |
| 08/21/1984 | US4466273 In suspect pipe fittings |
| 08/14/1984 | US4465140 Method for the magnetization of well casing |
| 08/14/1984 | US4465139 Valve and sensing device for well conduits |
| 08/08/1984 | EP0114865A1 Apparatus for determining borehole or cavity configuration through inert gas interface. |
| 08/02/1984 | WO1984002978A1 Method and apparatus for leak testing of pipe |
| 07/31/1984 | US4463378 Borehole televiewer display |
| 07/31/1984 | US4462469 Fluid motor and telemetry system |
| 07/25/1984 | EP0014204B1 Metal type detector for drill pipes |
| 07/24/1984 | US4461172 Well monitoring, controlling and data reducing system |
| 07/24/1984 | US4461088 In a borehole navigation apparatus |
| 07/17/1984 | US4461015 Digital depth indicator for earth drilling apparatus |
| 07/17/1984 | US4460218 Characterization of in situ oil shale retorts prior to ignition |
| 07/17/1984 | US4460059 Method and system for seismic continuous bit positioning |
| 07/17/1984 | US4460038 Installation for testing a well and a process for use thereof |
| 07/17/1984 | US4459760 Apparatus and method to communicate information in a borehole |
| 07/17/1984 | US4459759 Angular rate and position transducer for borehole survey instrument |
| 07/17/1984 | US4459752 Precision tubular length measuring system |
| 07/11/1984 | EP0113285A1 Method and apparatus for determining the fluid flow characteristics in a bore hole by temperature measurement |
| 07/10/1984 | US4459480 Method of measuring void spaces |
| 07/10/1984 | US4458767 Method for directionally drilling a first well to intersect a second well |
| 07/10/1984 | US4458521 Leak detection system |
| 07/10/1984 | CA1170756A1 Remote seismic data system |
| 07/10/1984 | CA1170476A1 Method and apparatus for testing tightness of pipe threads |
| 07/06/1984 | EP0083366A4 Moving mass pump jack and method of operation. |
| 07/03/1984 | US4457370 Method and device for effecting, by means of specialized tools, such operations as measurements in highly inclined to the vertical or horizontal well portions |
| 07/03/1984 | US4457077 Borehole gradiometer |
| 06/27/1984 | EP0112248A1 Method and apparatus for electrically determining pipe inside diameter |
| 06/26/1984 | US4455875 Pressure measurement sonde |
| 06/26/1984 | US4455869 Method for determining borehole or cavity configuration through inert gas interface |
| 06/20/1984 | EP0111353A2 Blanket-medium/brine interface detection in a solution-mining process |
| 06/19/1984 | US4454756 Inertial borehole survey system |
| 06/13/1984 | EP0110750A2 Method and apparatus for producing an image log of a borehole wall penetrating an earth formation |
| 06/12/1984 | US4454598 Drilling orientation tool |
| 06/12/1984 | US4453599 Method and apparatus for controlling a well |
| 06/12/1984 | US4453595 Method of measuring fracture pressure in underground formations |
| 06/05/1984 | US4453219 Dipmeter displacement processing technique |
| 06/05/1984 | US4452638 Cement, h2o, carbon black, coal dust and surfactant |
| 06/05/1984 | US4452306 Apparatus for detecting ruptures in drill pipe above and below the drill collar |
| 06/05/1984 | US4452077 For determining the rate of fluid flow |
| 06/05/1984 | US4452076 Well logging tool |
| 06/05/1984 | US4452075 Push drill guidance indication apparatus |
| 06/05/1984 | CA1168572A1 Well logging apparatus and method for making same |
| 05/30/1984 | EP0109830A2 Inertial borehole survey system |
| 05/23/1984 | EP0108903A2 Universal interface method and apparatus for subsurface earth formation testing |
| 05/23/1984 | EP0108902A2 Method and apparatus for obtaining high resolution subsurface geophysical measurements |
| 05/22/1984 | US4450539 Apparatus for measuring the relative position of a downhole tool in a bore hole |
| 05/16/1984 | EP0108534A2 Acoustic indicator for wells |
| 05/15/1984 | US4448250 Method of freeing a hollow tubular member |
| 05/15/1984 | CA1167372A1 Method for monitoring flood front movement during water flooding of subsurface formations |
| 05/08/1984 | CA1166844A1 Borehole survey apparatus utilizing accelerometers and probe joint measurements |
| 05/08/1984 | CA1166843A1 Borehole survey apparatus and method |
| 05/01/1984 | US4446433 Apparatus and method for determining directional characteristics of fracture systems in subterranean earth formations |
| 05/01/1984 | US4445578 System for measuring downhole drilling forces |
| 05/01/1984 | CA1166626A2 Systems, apparatus and methods for measuring while drilling |
| 04/25/1984 | EP0105967A1 Method and apparatus for the investigation of the structure and permeability of soil and rock formations |
| 04/24/1984 | US4444267 Well testing apparatus |
| 04/24/1984 | US4444254 Slip assembly for hydraulic pipe testing |
| 04/24/1984 | US4444050 Method in analyzing the nature of deflection of string of pipes in wellbores |
| 04/24/1984 | CA1166148A1 Apparatus for and a method of acoustic well logging |
| 04/17/1984 | US4442895 Method of hydrofracture in underground formations |
| 04/17/1984 | US4442711 Device for measuring the flow of fluid in a well |
| 04/17/1984 | CA1165854A1 Signalling within a borehole while drilling |