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)
10/1999
10/05/1999US5962819 Clamped receiver array using coiled tubing conveyed packer elements
10/05/1999US5961252 Underground utility installation tension monitoring arrangement and method
10/05/1999US5960883 Power management system for downhole control system in a well and method of using same
09/1999
09/29/1999EP0945590A2 Electromagnetic downlink and pickup apparatus
09/29/1999CN2340897Y Introducer of electric logging instrument
09/29/1999CN1229876A Whole three-dimentional resistivity logging method
09/28/1999US5960370 Method to determine local variations of the earth's magnetic field and location of the source thereof
09/28/1999US5960187 Method for forming a simulation model of transient two-phase flows in pipelines
09/28/1999US5959548 Electromagnetic signal pickup device
09/28/1999US5959547 Well control systems employing downhole network
09/28/1999US5957222 Directional drilling system
09/28/1999US5957221 Downhole core sampling and testing apparatus
09/28/1999US5957201 Verification apparatus and method for a static wellhead plug
09/28/1999US5957195 Wellbore tool stroke indicator system and tubular patch
09/28/1999CA2194854C Casing joint detector
09/28/1999CA2173350C Apparatus for testing a shear thickening plugging fluid
09/28/1999CA2155917C Early evaluation by fall-off testing
09/22/1999EP0943782A2 Sensor array for downhole use
09/22/1999CN2339748Y External tube of gradiometer
09/22/1999CN1229164A Pressure testing device for deep well pump
09/22/1999CN1045220C Method for finding remaining oil by boron and neutron life well-logging instrument
09/21/1999US5956132 Method and apparatus for optically discriminating between the phases of a three-phase fluid
09/21/1999US5955966 Signal recognition system for wellbore telemetry
09/21/1999US5955666 Satellite or other remote site system for well control and operation
09/16/1999WO1999046615A1 Clamped receiver array using coiled tubing conveyed packer elements
09/16/1999CA2264409A1 Method for permanent emplacement of sensors inside casing
09/15/1999EP0942148A2 Apparatus for sampling fluids
09/15/1999EP0942147A1 Use of polyaryletherketone-type thermoplastics in downhole tools
09/15/1999CN1228824A System for directional control of drilling
09/14/1999US5950743 Method for horizontal directional drilling of rock formations
09/10/1999WO1999045235A1 Inflow detection apparatus and system for its use
09/09/1999CA2265048A1 Self-locking connector
09/08/1999EP0940559A2 Apparatus and method for measuring the diameter of a body obtained in the ground by high pressure injection
09/08/1999CN2337315Y Neutron tube with integral ring-shape alpha-detector for detecting well
09/07/1999US5949069 Method and apparatus for measuring volumetric water flow rates in highly inclined wellbores
09/07/1999US5947213 In a well bore
09/07/1999US5947199 Method of monitoring a mineral reservoir
09/07/1999CA2090394C Gas hold up tool for use in cased well boreholes
09/02/1999WO1999044367A1 Single camera video inspection system for water wells and bore holes
09/02/1999WO1999044168A1 Method for measuring and controlling the flow of natural gas from gas wells
09/02/1999WO1999027230A3 Method for locating placement of a guide stock in a multilateral well and apparatus therefor
09/02/1999CA2321546A1 Single camera video inspection system for water wells and bore holes
09/01/1999EP0939195A2 Apparatus and method for determining a drilling mode to optimize formation evaluation measurements
09/01/1999EP0803073A4 Dipmeter processing technique
08/1999
08/31/1999US5946094 Apparatus for determining the curvature of an elongated hole
08/31/1999US5945923 Device and method for transmitting information by electromagnetic waves
08/31/1999US5944124 Fiber impregnated with polymer
08/31/1999CA2021661C Method and system for vertical seismic profiling by measuring drilling vibrations
08/26/1999DE19834731C1 Measuring device for bore holes for making high pressure injection bodies
08/26/1999DE19806709A1 Procedure for measuring boring pattern of deep-hole bores, especially of blind-end bores
08/24/1999US5942990 Electromagnetic signal repeater and method for use of same
08/24/1999US5941307 Production well telemetry system and method
08/24/1999US5941305 Real-time pump optimization system
08/24/1999US5941121 For measuring liquid pressure
08/24/1999CA2254490C Method and apparatus for investigating earth formations
08/18/1999CN1226305A Logging method
08/12/1999WO1999040530A1 Method for predicting pore pressure in a 3-d volume
08/12/1999WO1999020869A3 Equalizing subsurface safety valve with injection system
08/11/1999EP0935049A2 Wellbore apparatus and methods
08/11/1999CN1044632C Method for determining borehole direction
08/10/1999US5937362 Method for predicting pore pressure in a 3-D volume
08/10/1999US5934391 Sonde housing door hold-down system
08/10/1999US5934383 Steering device for steerable drilling tool
08/10/1999US5934373 Apparatus and method for monitoring underground fracturing
08/10/1999US5934371 Remotely controlled shut-off valve and variable choke assembly
08/10/1999US5933945 Composite coiled tubing apparatus and methods
08/10/1999CA2140748C Reduced diameter down-hole instrument cable
08/05/1999WO1999039080A1 Device for transmitting information from the bottom of a bore-hole
08/05/1999CA2260624A1 Lateral wellbore connection
08/04/1999CN2331761Y Samper for oil well
08/04/1999CN2331760Y Lead mould pigging gauge
08/03/1999US5933008 In an overall process
08/03/1999US5931240 Drill bit concave steering channel for horizontal directional drilling
08/03/1999US5931000 Cooled electrical system for use downhole
07/1999
07/29/1999WO1999038315A2 Method to transmit downhole video up standard wireline cable using digital data compression techniques
07/29/1999DE19802209A1 Expanding drilling head for pipe channels without trench digging
07/28/1999EP0932054A2 Downhole telemetry system and method for remote communication
07/27/1999US5930099 Grounding arrangement for a powerline system
07/27/1999US5929758 Method and apparatus for achieving parallel cable boring
07/27/1999US5929540 Switching circuit for switching the mode of operation of a subterranean probe and method of switching
07/27/1999US5929437 Encapsulated radioactive tracer
07/27/1999US5927409 Used in a drill string for drilling a bore through a formation
07/27/1999CA2136545C Instrument probe having a back-lighted camera
07/22/1999WO1999037044A1 Bore hole transmission system using impedance modulation
07/22/1999WO1999036802A1 Downhole inductively coupled digital electronic system
07/22/1999WO1999036659A1 A method and an arrangement for detecting and localizing foul matter internally in a pipe string
07/21/1999EP0930518A2 Downhole tool using electromagnetic waves
07/21/1999EP0850348B1 Borehole surveying
07/21/1999CN2329763Y Electronic pressure and flow double-value meter for water injection well
07/21/1999CN1044286C Ridioactive energy spectrum tracer water uptake section well logying method
07/20/1999US5926025 Method of finding an above-ground point in relation to an in-ground boring tool
07/20/1999US5925879 Oil and gas well packer having fiber optic Bragg Grating sensors for downhole insitu inflation monitoring
07/20/1999US5924499 Acoustic data link and formation property sensor for downhole MWD system
07/20/1999CA2259760A1 Electromagnetic resistivity tool and method for use of same
07/15/1999WO1999035490A1 Method and apparatus for ultrasonic imaging of a cased well
07/15/1999WO1999035213A1 Water soluble invert emulsions
07/15/1999WO1999035212A1 Water soluble invert emulsions
07/15/1999WO1999035211A1 Conductive medium for openhole logging and logging while drilling
07/13/1999US5923170 Method for near field electromagnetic proximity determination for guidance of a borehole drill
07/07/1999EP0927892A2 Detection system
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