| 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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| 09/26/2012 | CN101660408B Stratification oil production logging instrument of low-yield liquid oil well |
| 09/26/2012 | CN101285382B Lithology density-microballoons focused device composite probe |
| 09/25/2012 | US8272457 Detachable latch head for core drilling |
| 09/25/2012 | US8272260 Method and apparatus for formation evaluation after drilling |
| 09/25/2012 | CA2486235C An automatic control system and method for bottom hole pressure in the underbalance drilling |
| 09/20/2012 | WO2012125936A2 Downhole rebound hardness measurement while drilling or wireline logging |
| 09/20/2012 | WO2012125934A2 Piezoelectric transducer and downhole tool for measuring fluid properties |
| 09/20/2012 | WO2012125890A2 Controlled release biocides in oilfield applications |
| 09/20/2012 | WO2012123454A2 Mixture of a multiphase fluid |
| 09/20/2012 | WO2012094094A3 Method and apparatus for a mid-infrared (mir) system for real time detection of petroleum in colloidal suspensions of sediments and drilling muds during drilling, logging, and production operations |
| 09/20/2012 | US20120235030 Test Formation Apparatus for a Downhole Tool |
| 09/20/2012 | US20120234599 Measuring Gas Losses at a Rig Surface Circulation System |
| 09/20/2012 | US20120234088 Cylindrical Shaped Snorkel Interface on Evaluation Probe |
| 09/20/2012 | CA2829826A1 Mixture of a multiphase fluid |
| 09/20/2012 | CA2829759A1 Controlled release biocides in oilfield applications |
| 09/19/2012 | CN202441373U Oil sampler for oil field |
| 09/19/2012 | CN202441372U Mining geology deep sock soil sampling equipment |
| 09/19/2012 | CN202441371U Geological logging rock-debris sampling and cleaning device |
| 09/19/2012 | CN202441370U Logging while drilling azimuth gamma detection instrument |
| 09/19/2012 | CN202441369U A reservoir stratum diagenesis simulation system |
| 09/19/2012 | CN202441359U Calibration facility of nuclear logging-while-drilling instrument with controllable source |
| 09/19/2012 | CN202441356U Disengaging mechanism for deep well equipment |
| 09/19/2012 | CN202441323U Sample injector of cyanide setting class blocking agent for rock core simulation blocking experiment |
| 09/19/2012 | CN102686828A Look ahead advance formation evaluation tool |
| 09/19/2012 | CN102686822A Determining a property of a formation material |
| 09/19/2012 | CN102684772A System and method for remote monitoring and fault diagnosis of logging system |
| 09/19/2012 | CN102678108A Medium-pressure filtration instrument for real-time petroleum drilling monitoring |
| 09/19/2012 | CN102678107A Two-position rotation system of combustion arm |
| 09/19/2012 | CN102678106A Data processing method for LWD (Logging While Drilling) electromagnetic wave resistivity logging instrument |
| 09/19/2012 | CN102678102A Array electric imaging logging based reservoir oil-water identification method and system |
| 09/19/2012 | CN102678100A Remote determinator for well head gas |
| 09/19/2012 | CN102674176A Vertical lifting system of burner boom |
| 09/19/2012 | CN101737031B Novel polar plate of micro-sphere focus logging tool |
| 09/18/2012 | CA2741870A1 Cylindrical shaped snorkel interface on evaluation probe |
| 09/13/2012 | WO2012122482A2 Electromagnetic viscosity sensor |
| 09/13/2012 | WO2012122377A2 Methods and devices for filling tanks with no backflow from the borehole exit |
| 09/13/2012 | WO2012122247A2 A method and apparatus for estimating a downhole fluid property using a miniature integrated circuit spectrometer |
| 09/13/2012 | WO2012087864A8 Method of utilizing subterranean formation data for improving treatment operations |
| 09/13/2012 | US20120232799 Methods and apparatus for characterization of petroleum fluid employing analysis of high molecular weight components |
| 09/13/2012 | US20120227963 Methods and devices for filling tanks with no backflow from the borehole exit |
| 09/13/2012 | US20120227482 Groundwater profile monitoring system |
| 09/13/2012 | CA2827888A1 Check valve assembly for well stimulation operations |
| 09/12/2012 | EP2497900A2 Modeling hydraulic fractures |
| 09/12/2012 | CN202431269U Plate-type rock debris sampler for gas drilling |
| 09/12/2012 | CN202431268U Device for rectifying sound wave environment pressure in sound wave amplitude logging |
| 09/12/2012 | CN202431262U Exploring tube frame and exploring tube compressing device thereof |
| 09/12/2012 | CN202431218U Blowout prevention high-pressure resistance bypass nipple |
| 09/12/2012 | CN102661147A Advancing retractable sampling drilling tool |
| 09/11/2012 | US8261818 Self-inserting seal assembly |
| 09/11/2012 | CA2462973C Use of cutting velocities for real time pore pressure and fracture gradient prediction |
| 09/07/2012 | WO2012118617A2 Dispersing separated hydrocarbon gas into separated oil during surface well testing for improved oil mobility |
| 09/07/2012 | WO2012116393A1 Rotation actuated core orientation system |
| 09/05/2012 | EP2494145A1 Automated hydrocarbon reservoir pressure estimation |
| 09/05/2012 | CN202417493U Sampler for total analysis of oil well |
| 09/05/2012 | CN202417492U Oil field rapid sampling device |
| 09/05/2012 | CN202417491U Pressure-volume-temperature (PVT) sample barrel and sample transferring tool |
| 09/05/2012 | CN202417490U Sampling blowout preventer for oil well |
| 09/05/2012 | CN202417489U Housing for logging-while-drilling electromagnetic wave resistivity measurement instrument |
| 09/05/2012 | CN202417488U Dual-packer formation tester for open hole |
| 09/05/2012 | CN202417487U Cover plate detector shell for 2228 lithologic density instrument |
| 09/05/2012 | CN202417472U Multicore crawler |
| 09/05/2012 | CN202417470U Circuit combination fixing device |
| 09/05/2012 | CN1896458B System and methods of deriving fluid properties of downhole fluids and uncertainty thereof |
| 09/05/2012 | CN1865656B Apparatus and method for obtaining downhole samples |
| 09/05/2012 | CN102654050A Oil-gas migration and accumulation module for continuous lithologic oil-gas reservoir |
| 09/05/2012 | CN102162260B Lateral force application device of similar experimental model |
| 09/05/2012 | CN101581218B Device and method for convenient measurement while drilling of coal bed gas parameters |
| 09/05/2012 | CN101424185B Geochemistry measuring method for pouring and acquiring residual oil parameter characteristic and relationship of mainstream line and shunt line oil reservoir |
| 09/04/2012 | US8256283 Method of downhole characterization of formation fluids, measurement controller for downhole characterization of formation fluids, and apparatus for downhole characterization of formation fluids |
| 09/04/2012 | US8256282 In situ determination of critical desorption pressures |
| 08/30/2012 | WO2012116204A2 Integrated reaming and measurement system and related methods of use |
| 08/30/2012 | WO2012116072A2 Multi-phase region analysis method and apparatus |
| 08/30/2012 | US20120217065 System for Analysing Gas From Strata Being Drilled Under High Mud Flows |
| 08/30/2012 | CA2827731A1 Multi-phase region analysis method and apparatus |
| 08/29/2012 | EP2491368A1 Apparatus and methods of determining fluid viscosity |
| 08/29/2012 | EP2491227A1 Formation fluid sampling control |
| 08/29/2012 | CN202402028U Warming device of hydraulic section of rotary sidewall coring gun |
| 08/29/2012 | CN202402027U Bursting diaphragm device used for drilling-production equipment |
| 08/29/2012 | CN202402023U Exploring tube system for underground wireless well logging during drilling |
| 08/29/2012 | CN102650208A Nuclear magnetic resonance logger probe while drilling and nuclear magnetic resonance logger while drilling |
| 08/29/2012 | CN101487390B Archie mode method for confirming initial oil saturation of oil layer |
| 08/29/2012 | CN101482010B While-drilling multi-frequency direction induction resistivity survey instrument |
| 08/28/2012 | US8251140 Fluid monitoring and flow characterization |
| 08/28/2012 | CA2670635C Apparatus and methods for sidewall percussion coring using a voltage activated igniter |
| 08/23/2012 | WO2012112154A1 Methods and systems of collecting and analyzing drilling fluids in conjuction with drilling operations |
| 08/23/2012 | WO2012109845A1 Downhole high-power electromagnetic pulse emission apparatus |
| 08/23/2012 | WO2012109844A1 Downhole time-domain pulsed electromagnetic method for detecting resistivity of stratum outside metal cased pipe |
| 08/23/2012 | WO2012080993A3 Method and integrated system for improving data and service quality with respect to measurement and analysis of reservoir fluid samples |
| 08/22/2012 | EP2488723A1 Surface gas evaluation during controlled pressure drilling |
| 08/22/2012 | CN202391423U Sampling device for deep-well gas-liquid mixtures in oil-gas field |
| 08/22/2012 | CN202391422U Suction-type high-pressure physical property sampler |
| 08/22/2012 | CN202391410U Leather bag |
| 08/22/2012 | CN102648425A Multiscale finite volume method for reservoir simulation |
| 08/22/2012 | CN102644460A Three-dimensional well pattern model for in-situ mining of shale oil |
| 08/22/2012 | CN102644459A Device and method for determining molecular diffusion coefficient of multi-component gas-liquid system in rock core |
| 08/21/2012 | US8245781 Formation fluid sampling |
| 08/21/2012 | US8245572 System and method for analysis of well fluid samples |
| 08/21/2012 | CA2594042C Method of using an adjustable downhole formation testing tool having property dependent packer extension |
| 08/16/2012 | WO2012108818A1 Method and arrangement to establish during down-the-hole drilling communication between the cavity of the drill string and the surrounding material |
| 08/16/2012 | WO2012106758A1 Method and tool for evaluating a geological formation |