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)
04/2003
04/16/2003EP1302624A1 Locating joints in coiled tubing operations
04/16/2003EP1301687A1 Borehole inspection video camera
04/16/2003CN2545586Y Well bottom temp. measurer
04/16/2003CN1410654A Oil gas formation, migration and accumulation analogue experiment installation
04/16/2003CN1410653A Bidimentional oil and gas migration and accumulation analogue experimental device
04/15/2003US6547010 Annular pack having mutually engageable annular segments
04/10/2003WO2003029615A1 Apparatus for monitoring undergound formations
04/10/2003WO2003029614A2 Tool and method for measuring properties of an earth formation surrounding a borehole
04/10/2003WO2003029602A2 Methods for determining characteristics of earth formations
04/10/2003US20030066671 Oil well casing electrical power pick-off points
04/10/2003US20030066652 Wireless downhole well interval inflow and injection control
04/10/2003US20030066650 Drilling system and method for controlling equivalent circulating density during drilling of wellbores
04/10/2003US20030066645 Method of and device for tracing hydraulic fractures, stimulations, cement jobs, etc. in oil and gas wells
04/09/2003EP1299615A1 Apparatus and methods for orientation of a tubular string in a non-vertical wellbore
04/09/2003EP1044247B1 Water soluble invert emulsions
04/09/2003EP0975992A4 Pressure impulse telemetry apparatus and method
04/09/2003CN1408984A Method for determining stratum diameter of well hole of projection hole finished well
04/08/2003US6543550 Long range electronic guidance system for locating a discrete in-ground boring device
04/08/2003US6543536 Well reference apparatus and method
04/08/2003US6543312 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
04/08/2003US6543281 Downhole densitometer
04/08/2003US6543280 Remote sensing and measurement of distances along a borehole
04/08/2003CA2239645C Method and apparatus for locating a drill bit when drilling out cementing equipment from a wellbore
04/03/2003WO2003027717A1 Sonde
04/03/2003WO2003027714A1 Common interface architecture for horizontal directional drilling machines and walk-over guidance systems
04/03/2003WO2003027713A2 Quadrupole acoustic shear wave logging while drilling
04/03/2003US20030065447 Methods, apparatus and products useful in the operation of a sucker rod pump during the production of hydrocarbons
04/03/2003US20030063013 Common interface architecture for horizontal directional drilling machines and walk-over guidance systems
04/03/2003US20030062197 Roller cone drill bit having lubrication contamination detector and lubrication positive pressure maintenance system
04/03/2003US20030062158 Methods for determining characteristics of earth formations
04/03/2003US20030062156 Downhole gauge carrier apparatus
04/03/2003US20030062155 Cementing plug location system
04/02/2003EP1062753B1 Borehole transmission system using impedance modulation
04/02/2003EP0960261B1 Tool and method for drilling a lateral well
04/02/2003CN2542828Y Safety device for oil-field wellhead
04/02/2003CN1407350A Underground signal communication and meaurement by metal tubing substance
04/02/2003CN1104639C Device and method for measuring permeability of rock fragments
04/01/2003USRE38052 Sensing apparatus for sensing pressure or temperature in oil wells, including transmitter relaying pressure or temperature information to a remote control point
04/01/2003US6540033 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations
04/01/2003US6540032 Apparatus for transferring electrical energy between rotating and non-rotating members of downhole tools
04/01/2003US6540021 Method for detecting inflow of fluid in a well while drilling and implementing device
04/01/2003US6540019 Intelligent thru tubing bridge plug with downhole instrumentation
04/01/2003US6539795 Method for determining a fluid contact level in a hydrocarbon fluid bearing formation
03/2003
03/27/2003WO2003025343A1 Fluid skin friction sensing device and method
03/27/2003WO2002103854A3 Conductor system
03/27/2003WO2002103394A3 Systems and methods for determining motion tool parameters in borehole logging
03/27/2003WO2002014907A9 Apparatus and method for synchronized formation measurement
03/27/2003US20030058739 Quadrupole acoustic shear wave logging while drilling
03/27/2003US20030058127 Power and signal transmission using insulated conduit for permanent downhole installations
03/27/2003US20030058125 Reservoir management system and method
03/27/2003US20030057366 Method of kick detection and cuttings bed buildup detection using a drilling tool
03/27/2003US20030056985 Oscillating shear valve for mud pulse telemetry
03/27/2003US20030056984 Logging while tripping with a modified tubular
03/27/2003US20030056983 Underground drilling device and method employing down-hole radar
03/27/2003US20030056952 Tracker injection in a production well
03/27/2003US20030056950 Method for determining formation characteristics in a perforated wellbore
03/27/2003US20030056607 Method for utilizing microflowable devices for pipeline inspections
03/27/2003US20030056581 Apparatus and method for analyzing fluids
03/27/2003US20030056381 Survey apparatus and methods for directional wellbore surveying
03/26/2003EP1296019A1 Azimuth control of hydraulic vertical fractures in unconsolidated and weakly cemented soils and sediments
03/26/2003EP1295271A2 Burst qam downhole telemetry system
03/26/2003CN2541604Y Anti-icing petroleum well logging cable depth metering device
03/26/2003CN1406311A Choke inductor for wireless communication and control in a well
03/25/2003US6538958 Method and apparatus for acoustics logging of fluid density and wet cement plugs in boreholes
03/25/2003US6538576 Self-contained downhole sensor and method of placing and interrogating same
03/25/2003US6537628 Reinforced elastomeric bag for use with electric submergible motor protectors
03/25/2003US6536538 Establishing positions of locating field detectors and path mapping in underground boring tool applications
03/25/2003US6536531 Apparatus and methods for orientation of a tubular string in a non-vertical wellbore
03/25/2003US6536529 Communicating commands to a well tool
03/25/2003US6536524 Method and system for performing a casing conveyed perforating process and other operations in wells
03/25/2003US6536522 Artificial lift apparatus with automated monitoring characteristics
03/25/2003US6536519 Downhole tool to generate tension pulses on a slickline
03/20/2003WO2003024039A2 Power source regulation along a transmission line with feedback loop
03/20/2003US20030052686 Probe for detecting the structure of a dielectric medium
03/20/2003US20030052683 Flux plane locating in an underground drilling system
03/20/2003US20030052670 Non-invasive detectors for wells
03/20/2003US20030051913 Mapping tool for tracking and/or guiding an underground boring tool
03/20/2003US20030051881 Electro-hydraulically pressurized downhole valve actuator
03/19/2003CN2540500Y Blow-output preventing bulkhead for water well stratified testing
03/19/2003CN1403685A Pile hole callipers
03/19/2003CN1403684A High-pressure sealed test method for filling and gas-producing profile
03/18/2003US6535458 Method and apparatus for suppressing drillstring vibrations
03/18/2003US6532839 Apparatus for the remote measurement of physical parameters
03/13/2003WO2003021301A2 Method and apparatus for determining the temperature of subterranean wells using fiber optic cable
03/13/2003WO2003021278A2 Inertially-stabilized magnetometer measuring apparatus for use in a borehole rotary environment
03/13/2003WO2003021248A1 Sucker rod dimension measurement and flaw detection system
03/13/2003US20030048697 Power generation using batteries with reconfigurable discharge
03/13/2003US20030048198 Self-contained downhole sensor and method of placing and interrogating same
03/13/2003US20030048197 Sequential hydraulic control system for use in a subterranean well
03/13/2003US20030047318 Whip retrieval method and apparatus
03/13/2003US20030047308 Wireless downwhole measurement and control for optimizing gas lift well and field performance
03/13/2003CA2429116A1 Inertially-stabilized magnetometer measuring apparatus for use in a borehole rotary environment
03/12/2003EP1290311A1 Sequential hydraulic control system for use in subterranean well
03/12/2003EP0815347B1 Method for measuring of flow and flowmeter
03/12/2003CN1402811A Leak detection method
03/12/2003CN1401881A Sand control data acquisition processing method, apparatus and system
03/12/2003CN1401878A Automatic perpendicular drilling tool
03/11/2003US6531871 Extension assembly for an electromagnetic antenna and method of connection
03/11/2003US6531694 Wellbores utilizing fiber optic-based sensors and operating devices
03/11/2003US6530154 Method to detect deviations from a wellplan while drilling in the presence of magnetic interference
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