Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 47 - Survey of boreholes or wells
Patents for E21B 47 - Survey of boreholes or wells (31,352)
09/1986
09/16/1986US4611405 In a borehole survey method
09/16/1986CA1211506A1 Borehole inertial guidance system
09/16/1986CA1211296A1 Method and apparatus for placement and retrieval of downhole gauges
09/12/1986WO1986004383A3 Fluid means for data transmission
09/09/1986US4610313 Drill bit having a failure indicator
09/03/1986EP0193230A1 Method for determining the azimuth of a borehole
09/02/1986US4610005 Video borehole depth measuring system
09/02/1986US4608861 MWD tool for measuring weight and torque on bit
09/02/1986CA1210850A1 Detection means for mud pulse telemetry system
08/1986
08/26/1986US4607698 Pipe configuration compatible with CBL
08/26/1986US4607694 Well plug quality testing
08/26/1986CA1210516A1 Telemetry scheme
08/26/1986CA1210508A1 Methods for locating oil or gas deposits employing temperature and/or geothermal gradient measurements
08/26/1986CA1210449A1 Downhole instrument and methods of manufacturing and using the same
08/20/1986CN86101119A Method for determining the azimuth of a borehole
08/19/1986US4606406 For use in a wellbore
08/19/1986CA1210062A1 Apparatus and method for logging wells while drilling
08/14/1986WO1986004636A1 Method and apparatus for data transmission in a well bore containing a conductive fluid
08/14/1986WO1986004635A1 Method and means for obtaining data representing a parameter of fluid flowing through a down hole side of an oil or gas well bore
08/12/1986US4605268 Transformer cable connector
08/12/1986US4605065 Method and apparatus for monitoring well tubing fluid
08/12/1986CA1209469A1 Test tool for subsea blowout preventer stack
08/05/1986CA1209208A1 Method and apparatus for producing an image log of a borehole wall penetrating an earth formation
07/1986
07/31/1986WO1986004383A2 Fluid means for data transmission
07/30/1986EP0188798A2 Method for the assembling of a tubing for measuring purposes
07/24/1986EP0155274A4 Exploring for subsurface hydrocarbons by sea floor temperature gradients preferably using a multiplexed thermistor probe.
07/23/1986EP0188365A2 Control method for a recording device
07/23/1986EP0188343A2 Stabilising tool
07/23/1986EP0159314A4 Noise subtraction filter.
07/22/1986US4601354 Means and method for facilitating measurements while coring
07/22/1986US4601353 Method for drilling drainholes within producing zone
07/22/1986US4601194 In oil field pipe at a rig floor
07/22/1986US4601100 For measuring a downhole characteristics in a well
07/16/1986EP0187599A1 Apparatus driven by hydraulic pressure for conducting logging and work-over operations in a deviated well during injection or production
07/15/1986US4601024 Borehole televiewer system using multiple transducer subsystems
07/15/1986US4600887 Microwave electromagnetic borehole dipmeter
07/15/1986CA1207656A1 Apparatus for well logging while drilling
07/15/1986CA1207655A1 Apparatus for well logging telemetry
07/09/1986EP0187000A1 Method of logging fluid flow rate, water fraction, and/or water salinity
07/08/1986US4599046 Control improvements in deep well pumps
07/08/1986US4598771 Method and apparatus for firing a perforating gun and simultaneously recording the downhole pressure
07/08/1986CA1207448A1 Method and apparatus for weighing a sucker-rod pumped well
07/08/1986CA1207447A1 Method and apparatus for recording and playback of dynagraphs for sucker-rod wells
07/08/1986CA1207446A1 Method and apparatus for detecting problems in sucker- rod well pumps
07/03/1986WO1986003800A1 Oil level sensor system and method for oil wells
07/02/1986EP0186328A2 Signal processing apparatus for use in well borehole
07/02/1986CA1207025A Magnetometer method of borehole fracture detection
07/01/1986US4598290 Fiber optic penetrator for offshore oil well exploration and production
07/01/1986US4597440 Method and apparatus for displacing logging tools in deviated wells
07/01/1986US4597289 Device for measuring stresses transmitted by a shaft, in particular to a drill bit
06/1986
06/25/1986EP0185111A1 Downhole steering apparatus
06/24/1986US4597067 Borehole monitoring device and method
06/24/1986US4596293 Targetable drill with pressure telemetering of drill parameters
06/24/1986US4596143 Method and apparatus for detecting fractures by ultrasonic echography along the wall of a material or a formation
06/24/1986US4596139 Depth referencing system for a borehole gravimetry system
06/24/1986CA1206470A1 Tooth configuration for an earth boring bit
06/19/1986WO1986003545A1 Method for remote registration of down hole parameters
06/19/1986WO1986003543A1 Process and system for monitoring wheel-type boring machines
06/17/1986US4594790 Borehole surveying employing ring laser gyroscope
06/17/1986CA1206089A1 Method and apparatus for signal recovery in a logging while drilling system
06/17/1986CA1205995A1 Method and apparatus for electrically determining pipe inside diameter
06/11/1986EP0184013A2 Method for the measurement of hydrostatic and gas pressure in a sealed bore hole
06/11/1986EP0183816A1 Collar assembly for telemetry
06/10/1986US4594665 Well production control system
06/10/1986US4593771 Tubing-conveyed external gauge carriers
06/10/1986US4593770 Method for preventing the drilling of a new well into one of a plurality of production wells
06/10/1986US4593559 Apparatus and method to communicate bidirectional information in a borehole
06/10/1986CA1205737A1 Apparatus for signalling within a borehole while drilling
06/03/1986CA1205377A1 Unitized well testing apparatus for use in hostile environments
06/03/1986CA1205376A1 Apparatus for, and a method of, signalling within a borehole while drilling
05/1986
05/28/1986EP0181931A1 Borehole inertial guidance system
05/20/1986US4590593 Electronic noise filtering system
05/20/1986US4589482 Well production system
05/20/1986CA1204661A1 Apparatus for the in-situ definition relating to the efficiency of a treatment during its application to a hydrocarbon well under production
05/20/1986CA1204634A1 Apparatus for detecting ruptures in drill pipe above and below the drill collar and method of detecting and correcting such ruptures to prevent loss of drilling mud
05/13/1986US4588951 Arm apparatus for pad-type logging devices
05/10/1986CN85105408A Collar assemble for telemetry
05/06/1986USH55 Method for improved mud pulse telemetry
05/06/1986US4587423 Method for gravel pack evaluation
05/06/1986US4587422 Subsurface density testing method
05/06/1986US4586571 Method of and arrangement for positioning of a drilling apparatus
05/06/1986CA1204173A1 Method and system for gain selection
04/1986
04/29/1986CA1203882A1 Method and system for producing a ppi display
04/29/1986CA1203881A1 Method and apparatus for cement bond logging
04/29/1986CA1203747A1 Outrigger arm displacement control mechanism and method
04/29/1986CA1203684A1 Method and apparatus for electrically determining pipe inside diameter
04/23/1986EP0178870A2 Method and apparatus for the servicing and inspection of pipes
04/22/1986US4584675 Method for transmitting data
04/22/1986US4583915 Pump-off controller
04/22/1986US4583592 Well test apparatus and methods
04/22/1986CA1203401A1 Method and apparatus for investigating the structure and porosity of earth and stony regions
04/16/1986EP0177505A1 Device for measuring internal dimensions of tubes
04/15/1986US4583093 Telemetry driving circuit
04/15/1986US4582147 Directional drilling
04/15/1986US4582136 Method and apparatus for placement and retrieval of downhole gauges
04/15/1986US4581927 Self-contained bore hole flow measurement system and method therefor
04/15/1986US4581926 Determination of steam quality in thermal injection wells
04/08/1986US4581725 Method and system for gain selection
04/08/1986US4581613 Submersible pump telemetry system
04/08/1986US4581584 Microwave electromagnetic borehole dipmeter
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