| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 10/16/1985 | EP0158001A1 Gauge for determining the profile of boreholes in rock |
| 10/16/1985 | EP0157766A1 Data encoding and synchronization for pulse telemetry |
| 10/15/1985 | US4547833 High density electronics packaging system for hostile environment |
| 10/15/1985 | US4547774 Optical communication system for drill hole logging |
| 10/15/1985 | US4547080 Convective heat flow probe |
| 10/15/1985 | US4546835 Horizontal earth boring directional guide |
| 10/15/1985 | CA1195107A1 Azimuth determination for vector sensor tools |
| 10/09/1985 | EP0157662A1 Apparatus for the reception of acoustical waves in a borehole |
| 10/08/1985 | US4546315 Apparatus for measuring the inside diameter of a metallic pipe in a well |
| 10/08/1985 | US4546314 Method and apparatus for measuring the inside diameter of a metallic pipe in a well |
| 10/08/1985 | US4545702 Boring-injection device, method for improving ground by means of the device and method for investigating ground state by means of the device |
| 10/08/1985 | US4545242 Method and apparatus for measuring the depth of a tool in a borehole |
| 10/08/1985 | US4545241 For use with fluid-driven in-hole turbines |
| 10/08/1985 | CA1194782A1 Borehole apparatus for thermal equalization |
| 10/08/1985 | CA1194780A1 Accelerated downhole pressure testing |
| 10/02/1985 | EP0156660A1 Apparatus for geophysical measurements in a bore hole |
| 10/01/1985 | EP0122932A4 Well logging sleeve and method for making same. |
| 10/01/1985 | EP0114865A4 Apparatus for determining borehole or cavity configuration through inert gas interface. |
| 10/01/1985 | CA1194598A1 Well monitoring, controlling and data reducing system |
| 10/01/1985 | CA1194405A1 Submersible pump telemetry system |
| 09/25/1985 | EP0155445A1 Stationary gauge for determining diameter variations in boreholes in rock |
| 09/25/1985 | EP0155274A1 Exploring for subsurface hydrocarbons by sea floor temperature gradients preferably using a multiplexed thermistor probe |
| 09/24/1985 | US4542647 Borehole inertial guidance system |
| 09/24/1985 | CA1193911A1 Method for monitoring an oil well pumping unit |
| 09/17/1985 | US4542488 Method and system for producing a PPI display |
| 09/17/1985 | US4541481 For use with a well tester |
| 09/17/1985 | US4541275 Log correlation method and apparatus |
| 09/17/1985 | US4541274 Apparatus and method for monitoring and controlling a pump system for a well |
| 09/17/1985 | CA1193542A1 Packer flowmeter with bypass |
| 09/17/1985 | CA1193541A1 Method and device using special tools for operations such as taking measures in portions of bore-wells sharply inclined or horizontal |
| 09/12/1985 | WO1985004005A1 Measurement using electrical transducers |
| 09/10/1985 | US4540941 Casing collar indicator for operation in centralized or decentralized position |
| 09/03/1985 | CA1192897A1 Auxiliary controlled valve disposed in a drilling string |
| 08/28/1985 | EP0046800B1 Riser angle positioning system and process |
| 08/27/1985 | US4537067 Inertial borehole survey system |
| 08/27/1985 | US4537062 Method and apparatus for investigating the structure and porosity of earth and stony regions |
| 08/21/1985 | EP0152192A2 Microwave electromagnetic borehole dipmeter |
| 08/20/1985 | CA1192296A1 Technique for investigating stand-off in a borehole |
| 08/13/1985 | US4535429 Apparatus for signalling within a borehole while drilling |
| 08/13/1985 | US4534706 Self-compensating oscillatory pump control |
| 08/13/1985 | US4534424 Retrievable telemetry system |
| 08/07/1985 | EP0150189A1 Apparatus and method for internally testing a plurality of interconnected pipe sections |
| 08/06/1985 | US4532812 Parametric acoustic flow meter |
| 08/06/1985 | CA1191554A1 Toroidal coupled telemetry apparatus |
| 08/06/1985 | CA1191531A1 Means for generating electricity during drilling of a borehole |
| 08/06/1985 | CA1191447A1 Instrument mounting |
| 07/30/1985 | US4532545 Subteranean surveying apparatus |
| 07/30/1985 | US4531579 Valve latch device for drilling fluid telemetry systems |
| 07/30/1985 | US4531403 Method and apparatus for fracturation detection |
| 07/23/1985 | US4530238 High pressure seal assembly |
| 07/23/1985 | CA1190918A1 Well logging apparatus and method for making same |
| 07/23/1985 | CA1190848A1 Method and apparatus for acoustically measuring the transverse dimensions of a borehole |
| 07/18/1985 | WO1985003105A1 Multiple piezometer and application of such a piezometer |
| 07/17/1985 | EP0148694A1 Electronics packaging system |
| 07/17/1985 | EP0148690A1 Device for detecting particles, in particular solid particles in a gaseous fluid flowing off through a pipe |
| 07/16/1985 | US4529939 System located in drill string for well logging while drilling |
| 07/16/1985 | US4529036 Method of determining subterranean formation fracture orientation |
| 07/16/1985 | US4528842 Method and apparatus for soil mechanics measurements of filter cakes |
| 07/09/1985 | US4527425 System for detecting blow out and lost circulation in a borehole |
| 07/09/1985 | CA1190137A1 Recessed mounting device for instruments and its backfolding arms |
| 07/02/1985 | US4527122 Bore hole direction measuring instrument control |
| 07/02/1985 | CA1189944A1 Well logging device |
| 07/02/1985 | CA1189726A1 Apparatus and method for sensing downhole pressure |
| 06/26/1985 | EP0146423A1 Device for measuring the seismic profile in a borehole |
| 06/25/1985 | US4525815 Well pipe perforation detector |
| 06/25/1985 | US4525715 Toroidal coupled telemetry apparatus |
| 06/25/1985 | CA1189442A1 Pump noise filtering apparatus for a borehole measurement while drilling system utilizing drilling fluid pressure sensing |
| 06/25/1985 | CA1189317A1 Instruments for monitoring the direction of a borehole |
| 06/20/1985 | WO1985002674A1 Device for measuring internal dimensions of tubes |
| 06/19/1985 | EP0145537A2 Drill stem testing apparatus with multiple pressure sensing ports |
| 06/19/1985 | EP0144350A1 Test tool for subsea blowout preventer stack |
| 06/18/1985 | US4524434 In a mineral recovery program |
| 06/18/1985 | US4524433 High speed sonic logging using multiple transducers |
| 06/18/1985 | US4524324 Downhole instrument including a flexible probe which can travel freely around bends in a borehole |
| 06/18/1985 | US4524319 Method for the determination of kinetics of structure formation in a binder |
| 06/18/1985 | US4524272 Behind casing water flow detector |
| 06/18/1985 | US4523651 Coal auger guidance system |
| 06/18/1985 | US4523459 Method for performing step rate tests on injection wells |
| 06/18/1985 | US4523453 Method for determining borehole or cavity configuration through inert gas interface |
| 06/18/1985 | CA1188979A1 Pump noise filtering apparatus for a borehole measurement while drilling system utilizing drilling fluid pressure sensing and drilling fluid velocity sensing |
| 06/05/1985 | EP0143192A2 Method and apparatus for conducting logging operations in a borehole |
| 06/04/1985 | US4520666 Methods and apparatus for determining flow characteristics of a fluid in a well from temperature measurements |
| 06/04/1985 | US4520665 System for detecting a native reservoir fluid in a well bore |
| 06/04/1985 | CA1188364A1 Method of and apparatus for mining analysis |
| 06/04/1985 | CA1188216A1 High speed well surveying |
| 05/28/1985 | US4520468 Borehole measurement while drilling systems and methods |
| 05/28/1985 | US4520109 Fluorocarbon tracers and tracing method |
| 05/28/1985 | US4519574 Auxiliary controlled valve disposed in a drilling string |
| 05/28/1985 | US4519238 Apparatus for internally testing a plurality of interconnected pipe sections |
| 05/21/1985 | US4518888 For use in a drill string operating in a borehole |
| 05/21/1985 | US4517835 Method for determining formation dip |
| 05/15/1985 | EP0141746A2 Annular electrical contact apparatus for use in drill stem testing |
| 05/14/1985 | US4517459 Temperature stabilization system for a radiation detector in a well logging tool |
| 05/14/1985 | US4516520 Method and apparatus of thermal detection using bonded coupon |
| 05/14/1985 | CA1187180A1 Method and apparatus for tallying pipe |
| 05/09/1985 | WO1985001983A1 Improved drilling method and apparatus |
| 05/08/1985 | EP0140788A2 Pressure pulse generator |
| 05/07/1985 | US4515225 Mud energized electrical generating method and means |
| 05/07/1985 | US4515011 Torque transmitting and indicating device for well drilling apparatus |
| 05/07/1985 | US4515010 Stuck point indicating device with linear sensing means |