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)
11/2000
11/21/2000US6150954 Subsea template electromagnetic telemetry
11/21/2000US6150822 Sensor in bit for measuring formation properties while drilling
11/21/2000US6148935 Joint for use in a directional boring apparatus
11/21/2000US6148933 Steering device for bottomhole drilling assemblies
11/21/2000US6148920 Equalizing subsurface safety valve with injection system
11/21/2000US6148912 Subsurface measurement apparatus, system, and process for improved well drilling control and production
11/16/2000WO2000029716A3 Azimuth control of hydraulic vertical fractures in unconsolidated and weakly cemented soils and sediments
11/15/2000EP1051838A2 Method to transmit downhole video up standard wireline cable using digital data compression techniques
11/15/2000EP0643898B1 Instrument probe having a back-lighted camera
11/15/2000CN2406063Y Storage-type electronic pressure gage
11/15/2000CN2406062Y Serial-fitted multi-purpose logging instrument
11/15/2000CN1273632A Measurement of flow fractions, flow velocities and flow rates of multiphase fluid using NMR sensor
11/14/2000US6147754 Laser induced breakdown spectroscopy soil contamination probe
11/14/2000US6147437 Pressure and temperature transducer
11/14/2000US6145378 Aided inertial navigation system
11/10/2000CA2271374A1 Method and apparatus for diagnosis of a rod string breakage on a producing well
11/09/2000DE19939262C1 Borehole measuring device uses stator and cooperating rotor for providing coded pressure pulses for transmission of measured values to surface via borehole rinsing fluid
11/08/2000CN2405010Y High temp. fluid prodn. section survey instrument for hot oil prodn. well
11/07/2000US6144316 Electromagnetic and acoustic repeater and method for use of same
11/07/2000US6142245 Extended reach drilling system
11/07/2000US6142244 Percussion boring machine with run monitoring
11/07/2000US6142230 Wellbore tubular patch system
11/07/2000US6142228 Downhole motor speed measurement method
11/07/2000CA2018493C Apparatus for extracting a liquid from a long tube
11/02/2000WO2000065198A1 Apparatus and method for transmitting information to and communicating with a downhole device
11/02/2000EP1048820A2 Method for exploiting geothermal energy and heat exchanger apparatus therefor
11/02/2000EP1047935A1 Method and apparatus for ultrasonic imaging of a cased well
11/02/2000EP1047748A1 Conductive medium for openhole logging and logging while drilling
11/02/2000DE10016948A1 Measurement of the deviation of a bore hole from its nominal direction using a probe encapsulated above the bore head with sensors for inclination, depth and compass direction and a memory for recording data as a function of time
10/2000
10/31/2000US6138752 Method and apparatus to determine subterrranean formation stress
10/31/2000CA2117290C Downhole pressure gauge and convertor
10/26/2000WO2000064024A1 Downhole electronics protection apparatus
10/26/2000WO2000063531A1 Oil well interzone leak detection
10/26/2000CA2536620A1 Expandable connector for borehole tubes
10/26/2000CA2536385A1 Expandable connector for borehole tubes
10/25/2000EP1046930A2 Process for improving the bit seismic signal using drilling parameters
10/25/2000EP1046782A2 Self contained downhole sensor and method of placing and interrogating same
10/25/2000CN1271056A Expandable sensor device and method
10/25/2000CN1271055A Indicator diagram test method for non-stop oil-well pump
10/24/2000US6137621 Acoustic logging system using fiber optics
10/24/2000US6135204 Method for placing instrumentation in a bore hole
10/24/2000US6134892 Cooled electrical system for use downhole
10/23/2000CA2306059A1 Dual transmitter multi-capacitance flow meter
10/23/2000CA2305884A1 Self-contained downhole sensor and method of placing and interrogating same
10/18/2000EP1045113A1 Deployable sensor apparatus and method
10/18/2000EP1044247A1 Water soluble invert emulsions
10/18/2000CN2401695Y Inverted vertical hole inclinometer
10/18/2000CN1270270A Method for determining bore diameter by neutron porosity measurement
10/17/2000US6131673 Method of assaying downhole occurrences and conditions
10/17/2000US6131659 Downhole well corrosion monitoring apparatus and method
10/17/2000US6131658 Method for permanent emplacement of sensors inside casing
10/17/2000US6131451 Well flowmeter and down-hole sampler
10/12/2000WO2000060780A1 Method and apparatus for determining position in a pipe
10/12/2000WO2000060777A1 Method and apparatus for data communication with an underground instrument package
10/12/2000WO2000060212A1 Pipe conveyed logging system and method
10/11/2000EP0657006B1 Guided mole
10/04/2000EP1040251A1 Method to determine self-calibrated circumferential cased bond impedance
10/04/2000EP1040250A1 System and method for positioning a tool in a wellbore
10/04/2000CN1268993A Apparatus and method for determinating integrity of oil well tubing
10/03/2000US6125935 Method for monitoring well cementing operations
10/03/2000US6125934 Downhole tool and method for tracer injection
10/03/2000US6125933 Formation fracturing and gravel packing tool
10/03/2000US6125786 Underground warning system for underground conduits or pipes
10/03/2000US6125698 System and process for optimizing gravity gradiometer measurements
09/2000
09/27/2000CN2398422Y Logging instrument pushcart
09/27/2000CN1268218A Measurement of flow fractions, flow velocities, and flow rates of a multiphase fluid using ESR sensing
09/27/2000CN1267782A Physical logging simulator
09/27/2000CN1267781A Plate for high-temperature, high-pressure and micro-resistivity scanning and imaging logging instrument
09/27/2000CN1056906C Method for measuring direction of borehole
09/27/2000CN1056905C Logging electric circuit system
09/25/2000CA2272269A1 Flow responsive time delay pump motor control logic
09/21/2000WO2000055650A1 Method for electrokinetic downhole logging
09/21/2000WO2000055468A1 Directional drilling system for hard rock
09/21/2000WO2000055467A1 Method and apparatus for directional boring
09/21/2000CA2366115A1 Method and apparatus for directional boring
09/21/2000CA2365874A1 Directional drilling system for hard rock
09/20/2000EP1035852A1 Inhibitors of farnesyl-protein transferase
09/20/2000CN1267353A Drilling system with means for anchoring in borehole
09/20/2000CN1266940A Rotary steering drilling system using hydraulic servo loop
09/19/2000US6119777 Logging method
09/14/2000WO2000054028A1 System and method for monitoring corrosion in oilfield wells and pipelines utilizing time-domain-reflectometry
09/14/2000WO2000054009A2 Downhole depth correlation
09/14/2000WO2000053887A2 Wellbore primary barrier and related systems
09/14/2000WO2000053886A1 Fluid controlled adjustable down-hole tool
09/13/2000EP1035299A2 Combined electric-field telemetry and formation evaluation method and apparatus
09/12/2000US6116340 Downhole build-up pressure test using coiled tubing
09/12/2000US6116085 Instrumentation tubing string assembly for use in wellbores
09/08/2000WO2000052294A2 Drill head for directional boring
09/08/2000WO2000029717A3 Communications system having redundant channels
09/05/2000US6115061 In situ microscope imaging system for examining subsurface environments
09/05/2000US6114972 Electromagnetic resistivity tool and method for use of same
09/05/2000US6114857 System and method for monitoring corrosion in oilfield wells and pipelines utilizing time-domain-reflectometry
09/05/2000US6112809 Downhole tools with a mobility device
09/05/2000CA2235970C Method of efficient drawdown and buildup testing of a completed producing well
08/2000
08/31/2000WO2000050876A1 Analysis of downhole formation fluid contaminated by oil-based mud
08/30/2000CN2394005Y High temperature durable electronic pressure gage
08/30/2000CN1264832A Underground communication device with coil coupling withotu iron core
08/29/2000US6109834 Composite tubular and methods
08/29/2000US6109372 Rotary steerable well drilling system utilizing hydraulic servo-loop
08/29/2000US6109370 System for directional control of drilling
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