| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 04/17/1984 | CA1165853A1 Signalling within a borehole while drilling |
| 04/17/1984 | CA1165752A1 Weight on drill bit measuring apparatus |
| 04/12/1984 | WO1984001439A1 Apparatus and method for logging wells while drilling |
| 04/10/1984 | US4441561 Method and apparatus for treating well formations |
| 04/10/1984 | US4441362 Method for determining volumetric fractions and flow rates of individual phases within a multi-phase flow regime |
| 04/10/1984 | CA1165392A1 Method of automatic geologic interpretation |
| 04/04/1984 | EP0104993A2 Full-bore drill stem testing apparatus with surface pressure readout |
| 04/04/1984 | EP0104854A2 Method for the magnetization of well casing |
| 04/04/1984 | EP0104788A2 Methods of and apparatus for detecting exposure of components to selected temperatures |
| 04/03/1984 | US4440219 Thermally isolated well instruments |
| 04/03/1984 | US4440019 Free point indicator |
| 04/03/1984 | CA1164789A1 In situ measurement of gas content in formation fluid |
| 03/29/1984 | WO1984001189A1 Well logging apparatus and method for making same |
| 03/27/1984 | US4439678 Wellbore treatment |
| 03/27/1984 | US4439677 Wellbore fracture tracing |
| 03/27/1984 | US4438820 Grade monitoring and steering apparatus |
| 03/27/1984 | US4438810 Apparatus for decentralizing and orienting a well logging or perforating instrument |
| 03/13/1984 | US4436164 Lubrication failure detection system |
| 03/13/1984 | US4435978 Hot wire anemometer flow meter |
| 03/13/1984 | CA1163693A1 Apparatus for conduit free-point detection in boreholes |
| 03/07/1984 | EP0102274A2 Outrigger arm displacement control mechanism and method |
| 03/06/1984 | US4434848 Maximizing fracture extension in massive hydraulic fracturing |
| 03/06/1984 | US4434654 Borehole orientation detection system employing polarized radiation |
| 03/06/1984 | CA1163325A1 Method and apparatus for determining direction parameters of a continuously explored borehole |
| 03/06/1984 | CA1163190A1 Apparatus for detecting the stuck point of drill pipes in a borehole |
| 03/06/1984 | CA1163118A1 Device for measuring the flow of fluid through a well |
| 02/28/1984 | US4433573 Method and apparatus for determining the flow characteristics of a fluid in a well |
| 02/28/1984 | US4433491 Azimuth determination for vector sensor tools |
| 02/21/1984 | US4432143 For use in an earth borehole |
| 02/14/1984 | CA1162143A1 Servo valve for well-logging telemetry |
| 02/07/1984 | US4429581 Multiphase flow measurement system |
| 02/07/1984 | US4429566 Piping leakage detection method and apparatus |
| 02/01/1984 | EP0099638A2 A method and system of data transmission for a borehole logging tool |
| 02/01/1984 | EP0099637A2 Method and system for gain selection |
| 01/31/1984 | US4428422 Device provided with retractable arms for the anchoring of an instrument in a cavity |
| 01/31/1984 | US4428421 Wireline winch mounting system |
| 01/31/1984 | US4428123 Instrument mounting |
| 01/31/1984 | CA1161538A1 Process and device for transmitting information over a distance |
| 01/24/1984 | US4427941 Temperature compensated well logging tool |
| 01/24/1984 | US4427062 Positioning of deflection wedges |
| 01/24/1984 | US4427061 Universal drift and retriever |
| 01/24/1984 | US4426882 For sensing pressure in a well |
| 01/24/1984 | CA1160950A1 Method of determining the depth of occurrence of a chemically reactive bed |
| 01/19/1984 | WO1984000192A1 Method for determining borehole or cavity configuration through inert gas interface |
| 01/18/1984 | EP0098778A2 Method and apparatus for cement bond logging |
| 01/10/1984 | CA1160292A1 Method and apparatus for indicating well casing corrosion |
| 01/10/1984 | CA1160290A1 Metal type detector |
| 01/04/1984 | EP0097596A2 Method and well logging tool for measuring a characteristic of a flowing fluid |
| 01/04/1984 | EP0097433A2 Apparatus for protecting electrical components in high-temperature boreholes |
| 01/03/1984 | US4423625 Pressure transient method of rapidly determining permeability, thickness and skin effect in producing wells |
| 01/03/1984 | CA1159673A1 Formation tester |
| 12/28/1983 | EP0096975A1 Gamma ray spectral tool for borehole use |
| 12/20/1983 | US4422043 Electromagnetic wave logging dipmeter |
| 12/20/1983 | US4421982 Apparatus and method for downhole injection of radioactive tracer |
| 12/20/1983 | US4421166 Apparatus for injecting material into a well-bore |
| 12/20/1983 | US4420975 System and method for determining the relative permeability of an earth formation surrounding a wellbore |
| 12/20/1983 | US4420974 In-situ measurement system |
| 12/13/1983 | US4420565 Injection of tracers |
| 12/13/1983 | US4420049 Directional drilling method and apparatus |
| 12/06/1983 | US4418721 Fluidic valve and pulsing device |
| 11/29/1983 | US4417470 Electronic temperature sensor |
| 11/29/1983 | CA1157912A1 Casing inspection with magnetic permiability correction |
| 11/15/1983 | US4416000 System for employing high temperature batteries for making measurements in a borehole |
| 11/15/1983 | US4415895 Well logging data transmission system |
| 11/15/1983 | US4415805 Method and apparatus for evaluating multiple stage fracturing or earth formations surrounding a borehole |
| 11/15/1983 | US4415030 Casing re-entry apparatus for use in inclined oil and gas boreholes |
| 11/15/1983 | US4415028 Apparatus for measuring bottom hole well conditions |
| 11/15/1983 | US4414846 Gas well monitoring device |
| 11/08/1983 | US4414656 Well logging system for mapping structural and sedimentary dips of underground earth formations |
| 11/08/1983 | US4414634 Fluid flow totalizer |
| 11/08/1983 | US4413678 Alarm means for use with apparatus protecting a device situated in a borehole |
| 11/08/1983 | US4413676 Oil well monitoring device |
| 11/08/1983 | US4413516 Oil well service tool |
| 11/01/1983 | CA1156341A1 Apparatus for well logging while drilling |
| 10/25/1983 | US4412180 Method and device with adjustable focusing for measuring the electric resistivity of geological formations |
| 10/25/1983 | US4411546 Oil well sucker rod shear tool |
| 10/25/1983 | US4411152 Method and apparatus for testing pipes |
| 10/25/1983 | CA1155759A1 Well tools |
| 10/18/1983 | US4409824 Fatigue gauge for drill pipe string |
| 10/18/1983 | CA1155390A1 Device for routing a body through a fluid filled pipeline |
| 10/11/1983 | US4408481 Pore pressure probe assembly and two-stage emplacement thereof |
| 10/04/1983 | US4407374 Device for controlling the orientation of bore holes |
| 10/04/1983 | US4407157 Apparatus for measuring the diameter of a borehole |
| 10/04/1983 | CA1154749A1 Device for controlling the orientation of bore holes |
| 09/28/1983 | EP0089892A2 Method and apparatus for investigating stand-off in a borehole |
| 09/20/1983 | US4405021 Apparatus for well logging while drilling |
| 09/14/1983 | EP0088402A2 Apparatus for well logging telemetry |
| 09/13/1983 | US4403664 Earth boring machine and method |
| 09/06/1983 | US4402219 Apparatus for detecting the stuck point of drill pipes in a borehole |
| 09/06/1983 | CA1153288A1 Method and apparatus for obtaining selected samples of formation fluids |
| 08/31/1983 | EP0086926A1 An arrangement for orientating a guide device when drilling curved holes in rock |
| 08/30/1983 | US4401134 Pilot valve initiated mud pulse telemetry system |
| 08/30/1983 | US4400858 Heat sink/retainer clip for a downhole electronics package of a measurements-while-drilling telemetry system |
| 08/23/1983 | US4399877 Continuous borehole telemetry system and method |
| 08/23/1983 | US4399692 Borehole survey apparatus utilizing accelerometers and probe joint measurements |
| 08/23/1983 | CA1152628A1 Method for determining the extent of subsurface reaction involving acoustic signals |
| 08/17/1983 | EP0085989A2 Downhole instrument and methods of manufacturing and using the same |
| 08/16/1983 | US4399359 Method for monitoring flood front movement during water flooding of subsurface formations |
| 08/09/1983 | US4397098 Method and apparatus for zeroing a tilt meter mechanism |
| 08/09/1983 | CA1151731A1 Apparatus and method for casing inspection |