| 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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| 02/05/2009 | US20090032250 Method and system for cleat characterization in coal bed methane wells for completion optimization |
| 02/04/2009 | CN201190566Y On-line water content analysis device fro high-temperature production liquid |
| 02/04/2009 | CN101358984A Expert data management system for hydrocarbons intelligent analyzing and evaluating instrument |
| 02/04/2009 | CN101358527A Butt-joint water detection and blocking equipment |
| 02/04/2009 | CN101358526A Apparatus and method for unsticking a downhole tool |
| 02/04/2009 | CN101358524A Single-driving and double-receiving four-arm well diameter, microsphere, microelectrode eccentering device |
| 02/04/2009 | CN101358523A Differential pressure type flow densimeter underground |
| 02/04/2009 | CN101358517A Telemetry subsystem to communicate with plural downhole modules |
| 02/04/2009 | CN100458101C System and method for detecting the characters of underground stratum passed though by pitshift |
| 02/04/2009 | CN100458100C Method for measuring downhole pressure in the course of drilling operation and its equipment |
| 02/03/2009 | US7484563 Formation evaluation system and method |
| 01/29/2009 | US20090030858 Methods and apparatus to perform downhole fluid analysis using an artificial neural network |
| 01/29/2009 | US20090025928 Down hole tool with adjustable fluid viscosity |
| 01/28/2009 | EP2018464A1 Testing process for zero emission hydrocarbon wells |
| 01/28/2009 | CN201187299Y Pouring assemble water well head sampling apparatus |
| 01/28/2009 | CN201187298Y Formation fluid analytical apparatus under high temperature and high pressure environment |
| 01/28/2009 | CN201187297Y Apparatus for measuring permeability coefficient |
| 01/28/2009 | CN201187296Y Over casing tube digital array acoustic logging instrument |
| 01/28/2009 | CN201187292Y Multifunctional electrohydraulic integrated apparatus |
| 01/28/2009 | CN201187291Y Transposition power mechanism of ring pressure control test valve |
| 01/28/2009 | CN101354362A Method for analyzing x-ray fluorescence shale content in petroleum well drilling |
| 01/28/2009 | CN101354350A Light interference type methane analyzer |
| 01/28/2009 | CN101353962A Apparatus and methods to perform operations in a wellbore using downhole tools having movable sections |
| 01/28/2009 | CN101353961A Well bore logging detector and manufacture method thereof |
| 01/28/2009 | CN101353950A On-site connection joint for downhole tool and downhole tool |
| 01/28/2009 | CN100455768C Method for identifying stratum density at intervals of hole enlargement |
| 01/28/2009 | CN100455767C Neutron measurement method for determining porosity of a formation surrounding a borehole |
| 01/27/2009 | CA2508941C Apparatus and methods for measuring mud slowness in a borehole |
| 01/27/2009 | CA2484927C Method and apparatus for mwd formation testing |
| 01/22/2009 | WO2009009901A1 In situ determination of critical desorption pressures |
| 01/22/2009 | US20090022010 Earth analysis methods, subsurface feature detection methods, earth analysis devices, and articles of manufacture |
| 01/22/2009 | CA2690142A1 In situ determination of critical desorption pressures |
| 01/21/2009 | CN201184202Y Gas filtering device of gas drilling |
| 01/21/2009 | CN201184201Y Petroleum engineering well drilling density wireless sensing device |
| 01/21/2009 | CN201184200Y Petroleum engineering well drilling hydrogen sulphide wireless sensing device |
| 01/21/2009 | CN201184199Y Petroleum engineering drilling fluid electric conductivity wireless sensing device |
| 01/21/2009 | CN201184198Y Petroleum engineering well drilling combustible gas wireless sensing device |
| 01/21/2009 | CN201184197Y Data acquisition circuit for three-component induction logging |
| 01/21/2009 | CN201184188Y Graduated ring of array induction instrument |
| 01/21/2009 | CN201184187Y Fixed value pressure relief balanced system of well logging instrument |
| 01/21/2009 | CN201184186Y Snap ring of rubber centralizer |
| 01/21/2009 | CN201184185Y Electronic instrument framework |
| 01/21/2009 | CN201184130Y Oil gas well overflow and leakage experimental apparatus |
| 01/21/2009 | CN101351618A Dual probe sampler with formation heater |
| 01/21/2009 | CN101349151A Three-stage graduation apparatus of electromagnetic wave logger |
| 01/15/2009 | WO2009009409A1 Methods of calibrating a fluid analyzer for use in a wellbore |
| 01/15/2009 | WO2009008731A1 Devices and methods for formation testing by measuring pressure in an isolated variable volume |
| 01/15/2009 | US20090016900 Well jet device and the operating method thereof |
| 01/15/2009 | US20090015261 Determining formation parameters using electromagnetic coupling components |
| 01/15/2009 | US20090014214 Profiling element |
| 01/15/2009 | US20090014166 Shock absorption for a logging instrument |
| 01/15/2009 | CA2692557A1 Devices and methods for formation testing by measuring pressure in an isolated variable volume |
| 01/14/2009 | EP2013447A1 Method for production metering of oil wells |
| 01/14/2009 | CN201180541Y Anti-emptying anti-theft sampling valve for oil well |
| 01/14/2009 | CN201180540Y Dual-side direction simulated formation test box |
| 01/14/2009 | CN201180513Y Multifunctional shaft mouth blowout apparatus |
| 01/14/2009 | CN101344001A Analytical method of X-ray fluorescence terrigenous clastic rock porosity in petroleum well drilling |
| 01/14/2009 | CN101344000A Array magnetic-acoustic electro-conductibility imaging logging method and apparatus |
| 01/14/2009 | CN101343999A Array magnetic-acoustic electro-conductibility imaging logging method and apparatus |
| 01/14/2009 | CN101343998A High temperature magnet of nuclear magnetic resonance logging instrument and preparation method thereof |
| 01/14/2009 | CN101343996A High-precision locator used for electromagnetic wave logging instrument calibrator or graduator |
| 01/13/2009 | US7478024 Integrated reservoir optimization |
| 01/13/2009 | CA2488302C Apparatus and method for acquiring information while drilling |
| 01/13/2009 | CA2479262C Deep resistivity transient method for mwd applications using asymptotic filtering |
| 01/08/2009 | WO2009005976A1 Method and apparatus for controlling precession in a drilling assembly |
| 01/08/2009 | WO2009005876A2 System and method for monitoring and controlling production from wells |
| 01/08/2009 | US20090008079 Methods and apparatus to sample heavy oil in a subterranean formation |
| 01/08/2009 | CA2692272A1 Method and apparatus for controlling precession in a drilling assembly |
| 01/07/2009 | CN201177573Y Half-space type plastic lining |
| 01/07/2009 | CN201176875Y Intelligent puzzle lock |
| 01/07/2009 | CN201176872Y Down-hole parameter detector |
| 01/07/2009 | CN101338670A Method for down-hole multilevel micrologging for oil prospecting and electric coupler |
| 01/07/2009 | CN101338669A Time delay mechanism for randomly regulating time-delay in formation testing tools |
| 01/07/2009 | CN101338665A High-frequency electromagnetic wave sending machine |
| 01/07/2009 | CN101338653A Well wall gripping element |
| 01/07/2009 | CN100449293C Sample room with dead volumn washing |
| 01/07/2009 | CN100449116C Methods, apparatus, and systems for obtaining formation information utilizing sensors attached to a casing in a wellbore |
| 01/07/2009 | CN100449115C Method for determining stratum diameter of well hole of projection hole finished well |
| 01/06/2009 | US7472748 Methods for estimating properties of a subterranean formation and/or a fracture therein |
| 01/06/2009 | US7472589 Single phase fluid sampling apparatus and method for use of same |
| 01/06/2009 | US7472588 Petrophysical fluid flow property determination |
| 01/01/2009 | US20090006058 Iterative Drilling Simulation Process For Enhanced Economic Decision Making |
| 01/01/2009 | US20090003934 Mapping of contaminants in geologic formations |
| 01/01/2009 | US20090000822 Rock Core Removal Method and Apparatus |
| 01/01/2009 | US20090000785 Method and Apparatus to Quantify Fluid Sample Quality |
| 01/01/2009 | US20090000784 Method for oil sand exploration and development |
| 12/31/2008 | WO2009002591A2 Method and apparatus to quantify fluid sample quality |
| 12/31/2008 | WO2007070748A8 Method and apparatus for in-situ side-wall core sample analysis |
| 12/31/2008 | EP2007967A2 A system and method for estimating supercharge pressure and initial pressure of a formation |
| 12/31/2008 | CN201173919Y Gas transmitter |
| 12/31/2008 | CN101336334A System and method for obtaining well fluid samples |
| 12/30/2008 | US7469746 Downhole sampling tool and method for using same |
| 12/25/2008 | US20080314587 Downhole Tool Having an Extendable Component with a Pivoting Element |
| 12/25/2008 | US20080314137 Methods and apparatus for measuring formation properties |
| 12/24/2008 | WO2007100564A3 A method and apparatus for a downhole spectrometer based on tunable optical filters |
| 12/24/2008 | EP2005154A2 System and method for estimating filtrate contamination in formation fluid samples using refractive index |
| 12/24/2008 | EP2004955A1 Improved probe for pressure meter |
| 12/24/2008 | EP2004953A1 Method for optimising the production of a cluster of wells |
| 12/24/2008 | CN201170097Y Crude oil sampling apparatus |
| 12/24/2008 | CN201170096Y Sweeping type self-sealing antifreeze oil well sampler |