| 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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| 07/06/2004 | US6758274 Sample extraction system for boreholes |
| 07/06/2004 | US6758273 Low-flow groundwater sampling system |
| 07/06/2004 | US6758271 System and technique to improve a well stimulation process |
| 07/06/2004 | US6758090 Method and apparatus for the detection of bubble point pressure |
| 07/06/2004 | CA2193309C Early evaluation system with pump and method of servicing a well |
| 07/01/2004 | US20040128072 Self-calibrated ultrasonic method of in-situ measurement of borehole fluid acoustic |
| 07/01/2004 | US20040127185 Harmonic suppression for a multi-band transmitter |
| 07/01/2004 | US20040123645 Single tube densitometer |
| 06/30/2004 | CN2622389Y Pipe built-in type hanging positioning mechanism for pyvamid prospecting equipment |
| 06/29/2004 | US6755079 Method and apparatus for determining fluid viscosity |
| 06/24/2004 | US20040122640 System and process for optimal selection of hydrocarbon well completion type and design |
| 06/24/2004 | US20040119471 Downhole high resolution NMR spectroscopy with polarization enhancement |
| 06/24/2004 | US20040118610 Formation fluid sampling and hydraulic testing tool and packer assembly therefor |
| 06/22/2004 | CA2298252C A method for obtaining leak-off test and formation integrity test profiles from limited downhole pressure measurements |
| 06/22/2004 | CA2104326C Cementing systems for oil wells |
| 06/17/2004 | US20040113482 Portable placer exploration and sampling apparatus |
| 06/16/2004 | EP1427912A2 Dual piston single phase sampling mechanism and procedure |
| 06/15/2004 | CA2240326C Improved measurement port coupler and probe interface |
| 06/10/2004 | WO2004049216A1 Method and system for integrated reservoir and surface facility networks simulations |
| 06/10/2004 | WO2004048969A1 Apparatus and method for analysing downhole water chemistry |
| 06/10/2004 | US20040111216 Method of determining properties relating to an underbalanced well |
| 06/10/2004 | CA2506883A1 Method and system for integrated reservoir and surface facility networks simulations |
| 06/09/2004 | EP1425613A1 Downhole nmr processing |
| 06/09/2004 | EP1352153B1 Determining the viscosity of a hydrocarbon reservoir fluid |
| 06/08/2004 | US6745835 Method and apparatus for pressure controlled downhole sampling |
| 06/08/2004 | US6745834 Complete trip system |
| 06/03/2004 | US20040104821 Retrievable subsurface nuclear logging system |
| 06/03/2004 | US20040104355 Method and apparatus for a downhole fluorescence spectrometer |
| 06/03/2004 | DE69816743T2 Fiberoptische sensoren und ansteuervorrichtungen in bohrloechern Fiberoptic Sensors and Control devices in boreholes |
| 06/03/2004 | CA2450598A1 Method and apparatus utilizing nmr measurements to gather information on a property of the earth formation surrounding a wellbore |
| 06/02/2004 | CN1500966A Apparatus and method for sampling an earth formation through a cased borehole |
| 05/27/2004 | WO2004044380A1 A method and apparatus for supercharging downhole sample tanks |
| 05/27/2004 | WO2004003330A3 Formation fluid sampling and hydraulic testing tool and packer assembly therefor |
| 05/27/2004 | WO2003097988A3 Equalizer valve and method of use |
| 05/27/2004 | US20040100264 Process and device for assessing the permeabillity of a rock medium |
| 05/27/2004 | US20040099443 Apparatus and methods for sampling and testing a formation fluid |
| 05/27/2004 | US20040099418 Reservoir communication by creating a local underbalance and using treatment fluid |
| 05/25/2004 | US6740216 Potentiometric sensor for wellbore applications |
| 05/21/2004 | WO2004042355A2 Semipermeable membrane-based sampling systems |
| 05/21/2004 | WO2002057597A8 Determining the viscosity of a hydrocarbon reservoir fluid |
| 05/21/2004 | CA2504140A1 Semipermeable membrane-based sampling systems |
| 05/20/2004 | US20040098202 Method for measuring fluid chemistry in drilling and production operations |
| 05/20/2004 | US20040094296 Well testing system |
| 05/20/2004 | US20040093937 Determining the in situ effective mobility and the effective permeabilty of a formation |
| 05/13/2004 | WO2004025079A3 Methods to detect formation pressure |
| 05/13/2004 | WO2004001352A3 Apparatus and method of monitoring and signaling for downhole tools |
| 05/13/2004 | US20040091378 Mechanical bladder pump |
| 05/13/2004 | US20040089475 Non-rotating sensor assembly for measurement-while-drilling applications |
| 05/13/2004 | US20040089449 Controlling a pressure transient in a well |
| 05/13/2004 | US20040089448 Method and apparatus for supercharging downhole sample tanks |
| 05/13/2004 | US20040089079 Semipermeable membrane-based sampling systems |
| 05/12/2004 | EP1352154B1 Determining the pvt properties of a hydrocarbon reservoir fluid |
| 05/12/2004 | CN1495336A Method for measuring formation characteristics by utilizing time-limited formation test |
| 05/12/2004 | CN1149404C Polar plate for high-temperature, high-pressure and micro-resistif scanning and imaging logging instrument |
| 05/11/2004 | US6732798 Controlling transient underbalance in a wellbore |
| 05/06/2004 | WO2004038178A1 Apparatus and method for cleaning and sealing a well borehole portion for formation evaluation |
| 05/06/2004 | US20040083835 Insertion tube methods and apparatus |
| 05/06/2004 | US20040083827 Lysimeter methods and apparatus |
| 05/06/2004 | US20040083805 Methods and apparatus for rapidly measuring pressure in earth formations |
| 05/04/2004 | US6729416 Method and apparatus for retaining a core sample within a coring tool |
| 05/04/2004 | US6729400 Method for validating a downhole connate water sample |
| 05/04/2004 | US6729399 Method and apparatus for determining reservoir characteristics |
| 05/04/2004 | US6729398 Methods of downhole testing subterranean formations and associated apparatus therefor |
| 05/04/2004 | CA2259853C Apparatus and method for determining a drilling mode to optimize formation evaluation measurements |
| 05/04/2004 | CA2210442C A cutter head, boring jig and device and process for sea bottom boring |
| 04/29/2004 | US20040079555 Sampling isolator |
| 04/29/2004 | US20040079527 Method for cleaning and sealing a well borehole portion for formation evaluation |
| 04/28/2004 | EP1412722A2 Fluid property sensors |
| 04/28/2004 | CN1492127A Oil pipe dumping oil detecting and water exploring method and dump pump |
| 04/27/2004 | US6727696 Downhole NMR processing |
| 04/22/2004 | WO2004034089A2 Borehole conductivity profiler |
| 04/22/2004 | WO2004033844A2 System and method for installation and use of devices in microboreholes |
| 04/22/2004 | WO2003097988A9 Equalizer valve and method of use |
| 04/21/2004 | EP1411207A2 Sampling isolator |
| 04/21/2004 | CN1490494A Cavity water sampling and generating method for oil well in production |
| 04/20/2004 | US6722432 Slimhole fluid tester |
| 04/15/2004 | WO2003102628B1 Method and apparatus for a downhole fluorescence spectrometer |
| 04/15/2004 | US20040069487 System and method for installation and use of devices in microboreholes |
| 04/13/2004 | US6719049 Fluid sampling methods and apparatus for use in boreholes |
| 04/08/2004 | WO2004029406A1 Soil sampling and extraction unit |
| 04/08/2004 | US20040065453 Downhole sampling method and device used in standard penetration test |
| 04/08/2004 | US20040065439 Wellbores utilizing fiber optic-based sensors and operating devices |
| 04/08/2004 | US20040065438 Borehole conductivity profiler |
| 04/07/2004 | CN1488031A Determining the PVT properties of a hydrocarbon reservoir fluid |
| 04/07/2004 | CN1488030A Retrieving a sample of formation fluid in a cased hole |
| 04/07/2004 | CN1488029A Determining the in situ effe ctive mobility and the effective permeability of a formation |
| 04/07/2004 | CN1144933C Equipment and method for sampling from earth formation through cased borehole |
| 04/01/2004 | WO2003025326A3 Dual piston single phase sampling mechanism and procedure |
| 04/01/2004 | US20040060351 Process for predicting porosity and permeability of a coal bed |
| 03/31/2004 | EP1403465A1 Formation fracturing real-time monitoring |
| 03/31/2004 | CN1486395A Determining the viscosity of a hydrocarbon reservoir fluid |
| 03/31/2004 | CN1486394A Measuring the in situ static formation temperature |
| 03/30/2004 | US6712161 Tool and method for soil sampling |
| 03/30/2004 | US6712158 Apparatus and method for coring and/or drilling |
| 03/30/2004 | US6712138 Self-calibrated ultrasonic method of in-situ measurement of borehole fluid acoustic properties |
| 03/30/2004 | CA2442255A1 Displacement and force sensor |
| 03/30/2004 | CA2130899C Analysis of drilling fluids |
| 03/25/2004 | WO2004025079A2 Methods to detect formation pressure |
| 03/25/2004 | WO2003104602A3 Method for regression analysis of formation parameters |
| 03/25/2004 | US20040059554 Method of assaying downhole occurrences and conditions |