| Patents for E21B 49 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells (11,875) |
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| 07/28/2005 | US20050165593 Method for modelling the production of hydrocarbons by a subsurface deposit which are subject to depletion |
| 07/28/2005 | US20050165554 Fluids Chain-Of-Custody |
| 07/28/2005 | US20050161218 Probe isolation seal pad |
| 07/27/2005 | CN2713135Y 活塞式深井取样器 Deep piston sampler |
| 07/26/2005 | US6922662 Method for modelling flows in a fractured medium crossed by large fractures |
| 07/21/2005 | WO2005065277A2 Contamination estimation using fluid analysis models |
| 07/21/2005 | US20050160025 Contingent convertible financial instruments |
| 07/21/2005 | US20050155760 Method and apparatus for subsurface fluid sampling |
| 07/20/2005 | EP1554464A1 Apparatus and method for cleaning and sealing a well borehole portion for formation evaluation |
| 07/20/2005 | EP1554462A2 Apparatus and method of monitoring and signaling for downhole tools |
| 07/20/2005 | EP1397579A4 Method, system and tool for reservoir evaluation and well testing during drilling operations |
| 07/20/2005 | EP1240495B1 Improved method and apparatus for predicting the fluid characteristics in a well hole |
| 07/20/2005 | CN2711389Y Sampling device |
| 07/20/2005 | CN2711388Y Freeze-proofing sampling valve for water-injection well |
| 07/19/2005 | US6918440 Testing drill packer |
| 07/19/2005 | CA2355549C Apparatus and method for propelling a data sensing apparatus into a subsurface formation |
| 07/14/2005 | US20050150381 Method and system for degassing a fluid |
| 07/14/2005 | US20050150287 [real-time monitoring and control of reservoir fluid sample capture] |
| 07/14/2005 | US20050150273 Overburden rock core sample containment system |
| 07/13/2005 | EP1553260A2 Method for determining mud compressibility |
| 07/13/2005 | EP1552274A2 Borehole conductivity profiler |
| 07/13/2005 | EP1394356A4 Method for characterising parameters of wells, well bottom zone and formation, and device for carrying out said method |
| 07/07/2005 | US20050149307 Integrated reservoir optimization |
| 07/07/2005 | US20050149306 Iterative drilling simulation process for enhanced economic decision making |
| 07/06/2005 | EP1550788A2 Three dimensional steerable system |
| 07/05/2005 | US6912904 Single tube densitometer |
| 06/30/2005 | US20050140368 [method and apparatus for determining speed and properties of flowing fluids using nmr measurements] |
| 06/30/2005 | DE102004057165A1 Vorrichtung und Verfahren zum Untersuchen einer unterirdischen Formation Apparatus and method for inspecting a subterranean formation |
| 06/29/2005 | CN1633590A Method for determining the power of a test specimen, testing device and power test bench for the test specimen |
| 06/29/2005 | CN1632506A Positioning and fastening arrangement for drilling and coring on vertical circular cylinder |
| 06/28/2005 | US6910374 Borehole conductivity profiler |
| 06/23/2005 | WO2005056725A2 Superior extraction performance using sulfuric acid |
| 06/23/2005 | US20050133267 [coring tool with retention device] |
| 06/23/2005 | US20050133258 [nanotube electron emission thermal energy transfer devices] |
| 06/23/2005 | DE102004056545A1 Vorrichtung und Verfahren zum Gewinnen von Informationen aus einer unterirdischen Formation Device and method for obtaining information from a subterranean formation |
| 06/23/2005 | CA2547191A1 Superior extraction performance using sulfuric acid |
| 06/22/2005 | CN1629446A Coring tool with retention device |
| 06/21/2005 | US6907797 Method and apparatus for supercharging downhole sample tanks |
| 06/18/2005 | CA2490492A1 Coring tool with retention device |
| 06/16/2005 | WO2005054626A1 Methods for geomechanical fracture modeling |
| 06/16/2005 | US20050126824 Soil sampling system and method that allow headspace screening at spaced intervals without disturbing soil sample |
| 06/16/2005 | CA2549134A1 Methods for geomechanical fracture modeling |
| 06/15/2005 | EP1540299A1 Single phase sampling apparatus and method |
| 06/15/2005 | CN1628207A Well system |
| 06/15/2005 | CN1626771A Experimental apparatus forb simulating seepage flow |
| 06/14/2005 | US6905241 Determination of virgin formation temperature |
| 06/14/2005 | US6904797 Production profile determination and modification system |
| 06/09/2005 | WO2005052315A1 Method and apparatus for downhole fluid analysis using molecularly imprinted polymers |
| 06/09/2005 | US20050125209 Methods for geomechanical fracture modeling |
| 06/09/2005 | US20050120813 Apparatuses for interaction with a subterranean formation, and methods of use thereof |
| 06/09/2005 | US20050120576 Device to measure axial displacement in a borehole |
| 06/08/2005 | EP1194679B1 Method and system for testing a borehole by the use of a movable plug |
| 06/08/2005 | CN1624295A Downhole fluid pumping apparatus and method |
| 06/07/2005 | CA2316044C Reservoir monitoring through modified casing joint |
| 06/04/2005 | CA2488781A1 Fluids chain-of-custody |
| 06/02/2005 | WO2005050028A1 Well jet device for logging horizontal wells and the operating method thereof |
| 06/02/2005 | US20050115741 Well system |
| 06/02/2005 | US20050115716 Downhole fluid pumping apparatus and method |
| 06/02/2005 | DE102004048615A1 Well treatment system for achieving transient underbalance condition in wellbore, comprises surge charge adapted upon activation to penetrate housing and not penetrate material exterior of housing |
| 06/01/2005 | EP1535061A2 Method for measuring fluid chemistry in drilling and production operations |
| 05/31/2005 | US6899178 Method and system for wireless communications for downhole applications |
| 05/26/2005 | WO2005048664A2 High temperature circuits |
| 05/26/2005 | WO2005047647A1 A method and apparatus for a downhole spectrometer based on electronically tunable optical filters |
| 05/26/2005 | US20050109538 [apparatus and method for acquiring information while drilling] |
| 05/26/2005 | US20050109098 Method and apparatus for downhole fluid analysis using molecularly imprinted polymers |
| 05/25/2005 | EP1532435A1 Methods and apparatus for the measurement of hydrogen sulphide and thiols in fluids |
| 05/25/2005 | CN1619100A Neutron measurement method for determining porosity of a formation surrounding a borehole |
| 05/25/2005 | CN1619096A Antifreezing sampling valve used for oilfield well |
| 05/24/2005 | US6896074 System and method for installation and use of devices in microboreholes |
| 05/24/2005 | CA2361874C Method and apparatus for milling openings in downhole structures |
| 05/24/2005 | CA2262106C Apparatus and method for milling a hole in casing |
| 05/19/2005 | WO2005045474A1 Downhole high resolution nmr spectroscopy with polarization enhancement |
| 05/19/2005 | WO2005045179A1 Method and system for degassing a fluid |
| 05/17/2005 | CA2234852C Strain monitoring system |
| 05/12/2005 | WO2005042920A1 Method of determining the natural drive indices and of forecasting the performance of the future exploitation of an oil pool |
| 05/12/2005 | US20050099618 Method and apparatus for a downhole spectrometer based on electronically tunable optical filters |
| 05/12/2005 | US20050099184 Method and apparatus using one or more toroids to measure electrical anisotropy |
| 05/12/2005 | US20050098350 Three dimensional steering system and method for steering bit to drill borehole |
| 05/12/2005 | US20050098318 High-temperature circuits |
| 05/12/2005 | US20050098312 Method for measuring formation properties with a time-limited formation test |
| 05/10/2005 | US6892138 Determining the viscosity of a hydrocarbon reservoir fluid |
| 05/05/2005 | US20050096848 Automatic control system and method for bottom hole pressure in the underbalance drilling |
| 05/04/2005 | EP1527234A1 Method and device for soil analysis |
| 05/04/2005 | CN2697596Y Bottom hole flowing pressure and flowing temp. measurer |
| 05/04/2005 | CN2697316Y Water finding device for downhole |
| 05/04/2005 | CN1611745A Downhole sampling apparatus and method for using same |
| 05/04/2005 | CN1611743A Underground gas collecting drilling tool |
| 05/04/2005 | CN1611742A Under balance drilling bottom pressure automatic control system and method |
| 05/03/2005 | CA2260587C Multi-level monitoring well |
| 04/28/2005 | WO2004042355A3 Semipermeable membrane-based sampling systems |
| 04/28/2005 | US20050087367 System and method for interpreting drilling data |
| 04/28/2005 | US20050087018 Microgranulometry and methods of applications |
| 04/28/2005 | US20050087009 Method for measuring formation properties with a time-limited formation test |
| 04/27/2005 | CN2695637Y Small flow hydraulic impactor |
| 04/27/2005 | CN1609583A Support rotating undisturbed soil sampling device |
| 04/27/2005 | CN1199338C Improved coring drill motor and method for obtaining core sample of matter |
| 04/27/2005 | CN1199001C Method and equipment for obtaining data from underground rock |
| 04/26/2005 | CA2341060C Method and apparatus for anchoring a tool within a cased borehole |
| 04/26/2005 | CA2145283C Method for calculating sedimentary rock pore pressure |
| 04/21/2005 | WO2005035945A1 Method of detecting hydrocarbons in geological strata |