| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 01/16/2003 | US20030010492 Downhole telemetry and control system using orthogonal frequency division multiplexing |
| 01/16/2003 | US20030010491 System and method for the production of oil from low volume wells |
| 01/15/2003 | EP1275983A2 Downhole tool |
| 01/15/2003 | EP1274992A1 Apparatus and method for downhole well equipment and process management, identification, and actuation |
| 01/15/2003 | EP1274975A1 Quartz pressure transducer containing microelectronics |
| 01/15/2003 | CN1391632A Real-time control system and method for controlling underground boring machine |
| 01/15/2003 | CN1098963C Method for extending drill system and starting/finishing drilling process therewith |
| 01/14/2003 | US6507401 Apparatus and method for analyzing fluids |
| 01/14/2003 | US6505682 Controlling production |
| 01/14/2003 | CA2135446C Methods for monitoring reservoir-bearing formations, installations and devices for their implementation |
| 01/14/2003 | CA2134285C Slick line casing and tubing joint locator apparatus and associated methods |
| 01/11/2003 | CA2353097A1 Data acquisition system |
| 01/09/2003 | WO2003002951A2 Method and installation for locating the position of the boundary formed at the interface between two fluids contained in a reservoir |
| 01/09/2003 | WO2003002850A1 Measurement device and support for use in a well |
| 01/09/2003 | WO2003002849A1 Method and apparatus for detonating an explosive charge |
| 01/09/2003 | WO2003002840A2 Improved stabilizer for use in a drill string |
| 01/09/2003 | WO2002093126A3 Method and apparatus for downhole fluid characterization using flxural mechanical resonators |
| 01/09/2003 | WO2002048499A3 Method and apparatus for measuring mud and formation properties downhole |
| 01/09/2003 | US20030006906 Synchronous CDMA telemetry system for use in a wellbore |
| 01/09/2003 | US20030006071 Apparatus and method for horizontal drilling |
| 01/09/2003 | US20030006036 Mixing water, buffers, oxidizers, gels, gelation inhibitors, stabilizer and curing agents with tracers, then pumping the mixtures into bores, withdrawing fluids and measuring concentration of labels; well completion efficiency |
| 01/09/2003 | DE20213658U1 Well shaft inspection unit has multiple cameras for panoramic view |
| 01/08/2003 | WO2002090716A1 Method for characterising parameters of wells, well bottom zone and formation, and device for carrying out said method |
| 01/08/2003 | CA2415500A1 Method for characterising parameters of wells, well bottom zone and formation, and device for carrying out said method |
| 01/07/2003 | US6502634 Interface monitoring placement system |
| 01/02/2003 | US20030001753 Method and apparatus for wireless transmission down a well |
| 01/02/2003 | US20030000875 Well screen having a line extending therethrough |
| 01/02/2003 | US20030000743 Direction control in well drilling |
| 01/02/2003 | US20030000707 Method and apparatus for downhole fluid pressure signal generation and transmission |
| 01/02/2003 | US20030000706 High impact communication and control system |
| 01/02/2003 | US20030000703 Method and apparatus for perforating a well |
| 01/02/2003 | US20030000693 Blow out preventer testing apparatus |
| 01/02/2003 | US20030000300 Downhole electromagnetic logging into place tool |
| 01/02/2003 | EP1270870A1 Blow out preventer testing apparatus |
| 01/02/2003 | EP1269149A1 Method and apparatus for determining fluid viscosity |
| 01/02/2003 | EP1268977A1 Method for estimating the position of a drill |
| 01/02/2003 | DE20214856U1 Optical bore inspection probe has panoramic lens without mechanical motion |
| 12/31/2002 | US6501072 Methods and apparatus for determining precipitation onset pressure of asphaltenes |
| 12/31/2002 | US6499545 Miniature directional indication instrument |
| 12/31/2002 | US6499541 Method of installing components in a downhole apparatus, and apparatus obtained thereby |
| 12/31/2002 | US6499537 Well reference apparatus and method |
| 12/31/2002 | CA2233791C Dual downhole injection system utilizing coiled tubing |
| 12/31/2002 | CA2214707C Method for measuring of flow and flowmeter |
| 12/31/2002 | CA2193647C Downhole data transmission |
| 12/31/2002 | CA2151525C Subsurface signal transmitting apparatus |
| 12/27/2002 | WO2002104074A1 Tubing system and extrusion method |
| 12/27/2002 | WO2002103854A2 Conductor system |
| 12/27/2002 | WO2002103394A2 Systems and methods for determining motion tool parameters in borehole logging |
| 12/27/2002 | WO2002103158A1 Use of axial accelerometer for estimation of instantaneous rop downhole for lwd and wireline applications |
| 12/27/2002 | WO2002038908A3 Differential sensor measurements to detect drill bit failure |
| 12/27/2002 | CA2455330A1 Systems and methods for determining motion tool parameters in borehole logging |
| 12/26/2002 | US20020198661 Speed correction using cable tension |
| 12/26/2002 | US20020195564 Flexible dynamic housing |
| 12/26/2002 | US20020195276 Use of axial accelerometer for estimation of instantaneous ROP downhole for LWD and wireline applications |
| 12/26/2002 | US20020195247 Well-bore sensor apparatus and method |
| 12/25/2002 | CN2527707Y High temp. high pressure porous medium model |
| 12/25/2002 | CN2527706Y Electronic decoupling-connecting device for oil field logging |
| 12/25/2002 | CN2527705Y Perforation charge |
| 12/24/2002 | US6498341 Method for characterizing ground water measurement points by distinguishing ground water from subterranean water accumulation |
| 12/24/2002 | US6497556 Fluid level control for a downhole well pumping system |
| 12/24/2002 | US6497295 Torque limiting tool |
| 12/24/2002 | US6497288 Deviated borehole drilling assembly |
| 12/24/2002 | US6497282 Method of monitoring the diameter of columns made by injection |
| 12/24/2002 | US6497281 Cable actuated downhole smart pump |
| 12/24/2002 | US6497280 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 12/24/2002 | US6497279 Method of using a heater with a fiber optic string in a wellbore |
| 12/24/2002 | CA2134191C Method of correcting for axial and transverse error components in magnetometer readings during wellbore survey operations |
| 12/24/2002 | CA2071067C Borehole liquid acoustic wave transducer |
| 12/19/2002 | WO2002101415A1 Flexible dynamic housing |
| 12/19/2002 | WO2002101194A1 Conductive fluid flow logging tool |
| 12/19/2002 | WO2002101193A1 A wellbore directional steering tool |
| 12/19/2002 | US20020193004 Wired pipe joint with current-loop inductive couplers |
| 12/19/2002 | US20020190718 System and method for detecting an underground object using magnetic field sensing |
| 12/19/2002 | US20020189803 Subsurface signal transmitting apparatus |
| 12/19/2002 | US20020189339 Apparatus and method for measuring formation pressure using a nozzle |
| 12/19/2002 | US20020189338 Apparatus and method for syncronized formation measurement |
| 12/19/2002 | US20020189337 Conductive fluid logging sensor and method |
| 12/19/2002 | CA2826491A1 Conductive fluid flow logging tool |
| 12/19/2002 | CA2722128A1 Conductive fluid flow logging tool |
| 12/18/2002 | CN2526607Y Skeleton-type measuring sealing ring |
| 12/17/2002 | US6496008 Flux plane locating in an underground drilling system |
| 12/17/2002 | US6494288 Acoustic logging tool |
| 12/12/2002 | WO2002099250A1 Systems and methods for detecting casing collars |
| 12/12/2002 | WO2002086287A3 Conveying instrumentation within a borehole |
| 12/12/2002 | US20020185315 Wellbore directional steering tool |
| 12/12/2002 | US20020185275 Method and apparatus for orienting perforating devices and confirming their orientation |
| 12/12/2002 | US20020185273 Method of utilizing flowable devices in wellbores |
| 12/12/2002 | US20020184940 Single tube downhole densitometer |
| 12/11/2002 | EP0789849B1 Method for representing the path of one or more boreholes in a spatial and temporal domain |
| 12/11/2002 | CN1384272A Controllable transceiver unit for collecting stratigraphic data in well |
| 12/05/2002 | WO2002068797A3 Oscillating shear valve for mud pulse telemetry |
| 12/05/2002 | WO2002066921A3 Tubing elongation correction system and methods |
| 12/05/2002 | US20020180613 Digital signal receiver for measurement while drilling system having noise cancellation |
| 12/05/2002 | US20020179303 Method for repeating messages in long intelligent completion system lines |
| 12/05/2002 | US20020179301 Method and apparatus for placing and interrogating downhole sensors |
| 12/05/2002 | US20020178805 Method and apparatus for downhole fluid characterization using flexural mechanical resonators |
| 12/05/2002 | US20020178803 Downhole densitometer |
| 12/05/2002 | DE10220156A1 Vermessungswerkzeug, insbesondere zum Vermessen von Bohrlöchern und Verfahren zum Vermessen von Bohrlöchern Survey tool, particularly for measuring boreholes and method for measuring boreholes |
| 12/04/2002 | EP1261974A1 In-well monitoring and flow control system |
| 12/04/2002 | EP1261678A2 Conductive medium for openhole logging and logging while drilling |