| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 04/01/2009 | CN101397906A Magnetic field locator with two tri-axial antennas |
| 04/01/2009 | CN101397905A Stratified static pressure combination tool for water injection well |
| 04/01/2009 | CN101397904A Method for monitoring downhole casing strain by using optical fibre sensor |
| 04/01/2009 | CN101397903A Method for monitoring sleeve circumferential strain by using optical fibre grating sensor |
| 04/01/2009 | CN101397902A Method for monitoring oil, water well sleeve axial strain by using optical fibre Brillouin sensor |
| 04/01/2009 | CN101397901A A logging while producing apparatus and method |
| 04/01/2009 | CN100473965C Ageing processing device for semiconductive high-molecular material pressure and temp sensor and application thereof |
| 03/31/2009 | US7510029 System for tracking and maintaining an on-grade horizontal borehole |
| 03/31/2009 | US7510027 Borehole drilling control system, method and apparatus |
| 03/31/2009 | US7510026 Method and apparatus for collecting drill bit performance data |
| 03/31/2009 | US7510016 Packer |
| 03/31/2009 | US7509852 Fluid flow measuring device and method of manufacturing thereof |
| 03/31/2009 | CA2554937C Measurement tool for obtaining tool face on a rotating drill collar |
| 03/28/2009 | CA2639465A1 A logging while producing apparatus and method |
| 03/26/2009 | WO2009039468A1 Adaptive borehole corrections accounting for eccentricity for array laterlogs |
| 03/26/2009 | WO2009039389A1 Pre-verification of perforation alignment |
| 03/26/2009 | WO2009038886A1 Method and system for cleat characterization in coal bed methane wells for completion optimization |
| 03/26/2009 | WO2009038554A1 Ambient-activated switch for downhole operations |
| 03/26/2009 | WO2009038474A1 A method of abandoning a petroleum well |
| 03/26/2009 | WO2009005956A3 Optical sensor for measuring downhole ingress of debris |
| 03/26/2009 | WO2006041499A3 Measurement while drilling bi-directional pulser operating in a near laminar annular flow channel |
| 03/26/2009 | US20090082228 Viscosity Reduction |
| 03/26/2009 | US20090080291 Downhole gauge telemetry system and method for a multilateral well |
| 03/26/2009 | US20090078431 Systems and Methods for Providing Access to Wireline Communication Equipment |
| 03/26/2009 | US20090078413 Wireless casing collar locator |
| 03/26/2009 | US20090078411 Downhole Gas Influx Detection |
| 03/26/2009 | US20090078036 Method of downhole characterization of formation fluids, measurement controller for downhole characterization of formation fluids, and apparatus for downhole characterization of formation fluids |
| 03/25/2009 | EP2038809A2 Method for comparing and back allocating production |
| 03/25/2009 | EP2038513A2 Modular geosteering tool assembly |
| 03/25/2009 | CN201212394Y Thrower of electromanometer |
| 03/25/2009 | CN201212393Y Weighing type oil well metering device |
| 03/25/2009 | CN101392645A Rapid phase discrimination and automatic transmission unit |
| 03/25/2009 | CN101392643A Underground data wireless transmission device of gas drilling while drilling |
| 03/25/2009 | CN101392642A Underground data wireless transmission method of gas drilling while drilling |
| 03/25/2009 | CN100472031C System and method for transmitting electric power into a bore |
| 03/24/2009 | US7506696 Borehole drilling control system, method and apparatus |
| 03/24/2009 | US7506695 Method and apparatus for collecting drill bit performance data |
| 03/24/2009 | US7506688 System and method for breach detection in petroleum wells |
| 03/24/2009 | CA2639805A1 Viscosity reduction |
| 03/24/2009 | CA2545921C Enclosures for containing transducers and electronics on a downhole tool |
| 03/24/2009 | CA2533141C Self contained temperature sensor for borehole systems |
| 03/24/2009 | CA2505293C Method and apparatus for using pulsed field gradient nmr measurements to determine fluid properties in a fluid sampling well logging tool |
| 03/24/2009 | CA2398289C Choke inductor for wireless communication and control in a well |
| 03/20/2009 | CA2639577A1 Method of downhole characterization of formation fluids, measurement controller for downhole characterization of formation fluids, and apparatus for downhole characterization of formation fluids |
| 03/20/2009 | CA2639314A1 Downhole gas influx detection |
| 03/19/2009 | WO2008154250A3 Repeater for wired drill pipe |
| 03/19/2009 | WO2008147217A3 Control system |
| 03/19/2009 | US20090073809 Method and apparatus for acoustic data transmission in a subterranean well |
| 03/19/2009 | US20090071719 Boring Tool Tracking Fundamentally Based on Drill String Length, Pitch, and Roll |
| 03/19/2009 | US20090071718 Boring Technique Using Locate Point Measurements for Boring Tool Depth Prediction |
| 03/19/2009 | US20090071717 Position sensor for well tools |
| 03/19/2009 | US20090071645 System and Method for Obtaining Load Measurements in a Wellbore |
| 03/19/2009 | US20090071240 Apparatus and methods for measuring pressure using a formation tester |
| 03/18/2009 | EP2035657A2 Rigless well intervention apparatus and method |
| 03/18/2009 | CN201209444Y Wireless communication terrestrial circuit for LWD |
| 03/18/2009 | CN201209443Y Downhole data-transmission circuit of zonal injection well |
| 03/18/2009 | CN201209442Y Zonal pressure measuring unit for polymer quality sorting well |
| 03/18/2009 | CN201209440Y Storage type integration ultra-short type ultrasonic flowmeter |
| 03/18/2009 | CN201209439Y Cementing turbine flow adjustable transmitter |
| 03/18/2009 | CN201209438Y High-pressure turbine flow cementing simulation instrument |
| 03/18/2009 | CN101387565A Electric contact type pressure gauge for improving bridging structure of induction assembly |
| 03/18/2009 | CN101387199A Groundwater monitoring system |
| 03/18/2009 | CN101387198A Monitoring method for drilled wellbore trajectories |
| 03/18/2009 | CN101387197A Antimagnetic wear resistant jacket for LWD tool |
| 03/18/2009 | CN101387196A Coded signal emulation inspection method |
| 03/17/2009 | US7503403 Method and apparatus for enhancing directional accuracy and control using bottomhole assembly bending measurements |
| 03/17/2009 | US7503398 Methods and apparatus for actuating a downhole tool |
| 03/17/2009 | US7503387 Method of logging a well equipped with a rod pump |
| 03/12/2009 | WO2009033146A2 Mud pulse telemetry system |
| 03/12/2009 | WO2009033132A2 Apparatus and method for estimating a property of a fluid in a wellbore using photonic crystals |
| 03/12/2009 | WO2009032729A1 Methods and apparatus for high-speed telemetry while drilling |
| 03/12/2009 | WO2009032592A1 Wired pipe depth measurement system |
| 03/12/2009 | WO2009032504A1 Transducer assemblies for subsurface logging use |
| 03/12/2009 | WO2009032454A1 Mud level sensing system |
| 03/12/2009 | WO2009032416A1 Well performance modeling in a collaborative well planning environment |
| 03/12/2009 | WO2009032000A1 Monoconductor data-power transmission |
| 03/12/2009 | WO2009012218A3 System and method for an ac powered downhole gauge |
| 03/12/2009 | WO2009009437A3 Detecting acoustic signals from a well system |
| 03/12/2009 | US20090067288 System and Method for Wireless Communication in a Producing Well System |
| 03/12/2009 | US20090065254 Short Normal Electrical Measurement Using an Electromagnetic Transmitter |
| 03/12/2009 | US20090065251 Downhole Jack Assembly Sensor |
| 03/12/2009 | US20090065200 Method and apparatus for space out of permanently deployed well sensors |
| 03/12/2009 | US20090065194 Downhole Sliding Sleeve Combination Tool |
| 03/12/2009 | CA2698372A1 Adding positional information for surfaces in a geological formation after transforming to a gapped representation |
| 03/12/2009 | CA2697853A1 Transducer assemblies for subsurface logging use |
| 03/12/2009 | CA2695443A1 Directional drilling control using modulated bit rotation |
| 03/11/2009 | EP1397579B1 Method, system and tool for reservoir evaluation and well testing during drilling operations |
| 03/11/2009 | CN201206464Y Slurry pulser |
| 03/11/2009 | CN201206463Y Depth measurement apparatus for rotary drill rig |
| 03/11/2009 | CN201206462Y Piston press-transmission type pressure measurement short node |
| 03/11/2009 | CN201206461Y Clogging pressure gauge |
| 03/11/2009 | CN101384794A Tracer method and apparatus |
| 03/11/2009 | CN101384793A Pressure monitoring of control lines for tool position feedback |
| 03/11/2009 | CN101382069A Continuous tube horizontal borehole process and device |
| 03/11/2009 | CN100467828C Construction method of optical fiber television logging instrument for detecting fish top detection |
| 03/11/2009 | CA2638445A1 Optical fibers |
| 03/10/2009 | CA2545492C Method and apparatus for downhole fluid analysis using molecularly imprinted polymers |
| 03/10/2009 | CA2312480C Method to determine self-calibrated circumferential cased bond impedance |
| 03/07/2009 | CA2638484A1 Retractable sensor system and technique |
| 03/05/2009 | WO2009029850A2 Method and apparatus for well-bore proximity measurement while drilling |