| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 09/06/2005 | US6939717 Hydrogen sulphide detection method and apparatus |
| 09/06/2005 | US6938689 Communicating with a tool |
| 09/06/2005 | US6938470 Method and apparatus for downhole fluid characterization using flexural mechanical resonators |
| 09/06/2005 | US6938458 Acoustic doppler downhole fluid flow measurement |
| 09/01/2005 | WO2005080751A1 Acoustic logging tool sleeve |
| 09/01/2005 | WO2005079224A2 Hydraulic impulse generator and frequency sweep mechanism for borehole applications |
| 09/01/2005 | US20050190584 Versatile modular programmable power system for wireline logging |
| 09/01/2005 | US20050189946 Azimuthally sensitive receiver array for an electromagnetic measurement tool |
| 09/01/2005 | US20050189145 Hand-held riveting tool |
| 09/01/2005 | US20050189143 Multiple antenna system for horizontal directional drilling |
| 09/01/2005 | US20050189142 Wellbore drilling system and method |
| 09/01/2005 | US20050189115 Subsea Intervention |
| 09/01/2005 | US20050189107 Annular pressure relief collar |
| 09/01/2005 | US20050188758 Underground water resource monitoring and management system |
| 09/01/2005 | CA2498984A1 Apparatus and method for determining the position of an elongated member of a pump assembly |
| 08/31/2005 | EP1509678B1 Liquid level measurement |
| 08/31/2005 | CN2721860Y Non-stopped butt-joint device for load shift sensor |
| 08/31/2005 | CN1662800A Device having mstallable reference pressure for measuring pressure difference |
| 08/30/2005 | US6937923 Controller system for downhole applications |
| 08/30/2005 | US6937159 Downhole telemetry and control system using orthogonal frequency division multiplexing |
| 08/30/2005 | US6935439 Boring tool control using remote locator |
| 08/30/2005 | US6935431 Well reference apparatus and method |
| 08/30/2005 | US6935425 Method for utilizing microflowable devices for pipeline inspections |
| 08/30/2005 | US6935424 Mitigating risk by using fracture mapping to alter formation fracturing process |
| 08/30/2005 | CA2391713C Whipstock and retrieval method and apparatus |
| 08/25/2005 | WO2005078237A1 Annulus plugging detection using a pressure transmitter in gas-lift oil production |
| 08/25/2005 | WO2005078232A1 Core orientation device |
| 08/25/2005 | WO2005076803A2 Apparatus for changing wellbore fluid temperature |
| 08/25/2005 | WO2005031389A3 Obstacle detection for underground operations |
| 08/25/2005 | US20050187715 Method for measuring formation properties with a time-limited formation test |
| 08/25/2005 | US20050183887 Downhole positioning system |
| 08/25/2005 | US20050183858 Means and method for assessing the geometry of a subterranean fracture during or after a hydraulic fracturing treatment |
| 08/25/2005 | US20050183515 Retrievable downhole flow meter |
| 08/25/2005 | US20050183278 Electronically coded device measuring well depth information |
| 08/25/2005 | DE102004003481A1 Meßeinrichtung und Bohrvorrichtung für Tiefbohrungen sowie Verfahren zur Messung relevanter Daten bei Tiefbohrungen Measuring device and drilling device for deep drilling and method for measuring relevant data in deep wells |
| 08/25/2005 | CA2547974A1 Annulus plugging detection using a pressure transmitter in gas-lift oil production |
| 08/24/2005 | CN2720116Y Pressure-testing tool for shut-in well device |
| 08/24/2005 | CN2720115Y Vibration testing device for oil-submersible electric pump |
| 08/24/2005 | CN2720114Y Gas trace-indicating agent pretreatment device |
| 08/24/2005 | CN1657744A Apparatus and method for acquiring information while drilling |
| 08/24/2005 | CN1657743A Method and device for measuring resistivity by device near bit |
| 08/24/2005 | CN1657742A Electromagnetic telemetering method and system of measuring by bit |
| 08/24/2005 | CN1657741A Radio electromagnetic short transmission method and system |
| 08/24/2005 | CN1657740A Method and device for receiving and detecting mud pressure pulse signal |
| 08/24/2005 | CN1657739A Automatic tracking method and device for bottom depth of well and borehole trace |
| 08/23/2005 | US6933856 Adaptive acoustic transmitter controller apparatus and method |
| 08/23/2005 | US6932155 In situ thermal processing of a hydrocarbon containing formation via backproducing through a heater well |
| 08/23/2005 | US6932154 Pressure sensor insert for a downhole tool |
| 08/23/2005 | CA2356405C Method and apparatus for safely operating radiation generators in while-drilling and while-tripping applications |
| 08/23/2005 | CA2336646C Combination side pocket mandrel flow measurement and control assembly |
| 08/18/2005 | WO2005076041A1 Method of analysing nuclear count data |
| 08/18/2005 | US20050182870 Wireline telemetry data rate prediction |
| 08/18/2005 | US20050182566 Method and apparatus for determining filtrate contamination from density measurements |
| 08/18/2005 | US20050179560 Method and apparatus for mud pulse telemetry |
| 08/18/2005 | US20050178562 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 08/18/2005 | US20050178558 Hydraulic impulse generator and frequency sweep mechanism for borehole applications |
| 08/18/2005 | US20050178543 Data logger plunger |
| 08/17/2005 | EP1563255A1 Method for determining a track of a geographical trajectory |
| 08/17/2005 | EP1377725B1 Hydraulically balanced reciprocating pulser valve for mud pulse telemetry |
| 08/17/2005 | CN2718225Y Detecting guide emitter probe in non-excavation guiding instrument system |
| 08/17/2005 | CN2718224Y Well head oil gauge for pumping well |
| 08/17/2005 | CN2718223Y Electromagnetic induction water-cut sensor |
| 08/17/2005 | CN1656302A System and method for quantitatively determining variations of a formation characteristic after an event |
| 08/17/2005 | CN1654939A Pressure and temperature sensor made of semiconductive macromolecule material |
| 08/16/2005 | US6929075 Automated bore planning system for horizontal directional drilling |
| 08/16/2005 | US6929066 Method for upward growth of a hydraulic fracture along a well bore sandpacked annulus |
| 08/16/2005 | US6929063 Cutting locator tool |
| 08/16/2005 | US6928864 Tool assembly and monitoring applications using same |
| 08/16/2005 | CA2233853C Method and apparatus for locating indexing systems in a cased well and conducting multilateral branch operations |
| 08/11/2005 | WO2005073509A1 System and method for measurements of depth and velocity of instrumentation within a wellbore |
| 08/11/2005 | WO2005050257A8 High temperature imaging device |
| 08/11/2005 | US20050173185 Acoustic logging tool sleeve |
| 08/11/2005 | US20050173153 Earth penetrating apparatus and method employing radar imaging and rate sensing |
| 08/11/2005 | US20050173125 Apparatus for changing flowbore fluid temperature |
| 08/11/2005 | US20050173114 System and method for optimizing production in an artificially lifted well |
| 08/11/2005 | US20050173113 Method for measuring formation properties with a time-limited formation test |
| 08/11/2005 | US20050173112 Annulus plugging detection using a pressure transmitter in gas-lift oil production |
| 08/11/2005 | US20050173111 Permanently installed in-well fiber optic accelerometer-based seismic sensing apparatus and associated method |
| 08/11/2005 | US20050172721 Pressure sensor assembly suitable for use in harsh environments |
| 08/11/2005 | US20050172710 Method for borehole conductivity profiling |
| 08/11/2005 | CA2496649A1 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 08/10/2005 | EP1047935B1 Method and apparatus for ultrasonic imaging of a cased well |
| 08/10/2005 | CN2716496Y Blowout control pipe |
| 08/10/2005 | CN1651888A Ageing processing device for semiconductive high-molecular material pressure and temp sensor and its application |
| 08/10/2005 | CN1651887A Treating meter and signal measurement for semiconductive high-molecular material pressure and temp sensor |
| 08/10/2005 | CN1651717A Biprobe sidewall contact device |
| 08/10/2005 | CN1651716A Full automatic weighing type gas liquid diphase oil well metering device |
| 08/09/2005 | CA2201541C Signal recognition system for wellbore telemetry |
| 08/09/2005 | CA2133286C Apparatus and method for measuring a borehole |
| 08/04/2005 | WO2005071225A1 Automated drill string position survey |
| 08/04/2005 | WO2005071224A2 Measuring device and drilling device for deep drillings |
| 08/04/2005 | WO2004063835A3 Digital pressure derivative method and program storage device |
| 08/04/2005 | WO2004031537B1 Extracting drilling mode related data from well data logging |
| 08/04/2005 | US20050171699 Method for determining pressure of earth formations |
| 08/04/2005 | US20050169717 Electronic drill depth indicator |
| 08/04/2005 | US20050168349 Borehole telemetry system |
| 08/04/2005 | US20050168225 Determinination of borehole geometry inside cased wells with crosswell electromagnetics |
| 08/04/2005 | US20050168224 Receiver electronics proximate antenna |
| 08/04/2005 | US20050167157 Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
| 08/04/2005 | US20050167102 Casing vent security device |