| 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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| 03/13/2013 | CN202788799U Electronic circuit of dual laterolog equipment |
| 03/13/2013 | CN202788798U Underground pulse neutron generator |
| 03/13/2013 | CN202788797U Inhomogeneous clastic rock horizontal well physical model |
| 03/13/2013 | CN202788700U Motor-driven coiled tubing downhole tractor |
| 03/13/2013 | CN202788656U Underground-mine prospecting and well-logging centralizer |
| 03/13/2013 | CN102966349A System and method for monitoring cross-hole electromagnetic transient |
| 03/13/2013 | CN102966348A Device and method for measurement while drilling of direction resistivity by using non-full circle antennas |
| 03/13/2013 | CN102966345A Simulation well system for testing electromagnetic wave resistivity logging instrument |
| 03/13/2013 | CN102966343A Neutron porosity measurement devices with semiconductor neutron detection cells and methods |
| 03/13/2013 | CN102518432B Test device capable of simulating plugging of high temperature and high pressure dropping strata |
| 03/13/2013 | CN102373923B Reservoir stratum identification method |
| 03/13/2013 | CN102200008B Reservoir effectiveness identification method based on electrical imaging logging |
| 03/13/2013 | CN102022115B Quantitative needle tube sample injection system and method |
| 03/13/2013 | CN102022109B Communication line routing device of subsurface equipment |
| 03/13/2013 | CN101967970B Method for measuring dynamic capillary pressure of core under conditions of reservoir temperature and pressure |
| 03/13/2013 | CN101949288B Direct-shear measuring method of drilling rock mass specimen preparation |
| 03/13/2013 | CN101787884B Method for judging fluid type of reservoir through acoustic porosity-neutron porosity differential |
| 03/13/2013 | CN101435331B Method for making cracking rock core |
| 03/12/2013 | US8393207 Methods and apparatus to use multiple sensors to measure downhole fluid properties |
| 03/07/2013 | WO2013008195A3 System and method for performing wellbore stimulation operations |
| 03/07/2013 | WO2011132095A9 Methods for characterization of petroleum reservoirs employing property gradient analysis of reservoir fluids |
| 03/07/2013 | US20130056280 Sonic latch mechanism |
| 03/07/2013 | US20130056276 System and Method for Conducting Drilling and Coring Operations |
| 03/07/2013 | DE102011112292A1 Verfahren zur Verifikation von Alters-Tiefen-Beziehungen von Gestein in Sedimentbecken A method for verification of age-depth relationships of rocks in sedimentary basins |
| 03/07/2013 | CA2788230A1 Apparatus and method for measuring the acoustic impedance of wellbore fluids |
| 03/06/2013 | EP2563974A1 Method and device for measuring mechanical characteristics of the ground |
| 03/06/2013 | CN202767977U High temperature and high pressure suspension stability tester |
| 03/06/2013 | CN202767969U Stratum water filling monitor |
| 03/06/2013 | CN202767968U Three dimensional array induction calibration apparatus |
| 03/06/2013 | CN102953723A Switching method and switching device for combined logging service cable core |
| 03/06/2013 | CN102953717A Method for water-flooding abandoned condensate gas reservoirs |
| 03/06/2013 | CN102704922B Supercritical carbon dioxide carrying sand flow mechanism researching experiment device |
| 03/06/2013 | CN102606136B Logging-while-drilling value response law simulated experimental device |
| 03/06/2013 | CN101956549B Electromagnetic focusing sleeve screw thread logging instrument |
| 03/06/2013 | CN101892839B Method for formation evaluation |
| 03/05/2013 | US8387722 Strength (UCS) of carbonates using compressional and shear acoustic velocities |
| 02/28/2013 | WO2013028271A1 Apparatus and method for controlling a completion operation |
| 02/28/2013 | WO2012158381A3 Systems and methods for single-phase fluid sampling |
| 02/28/2013 | WO2012125934A3 Piezoelectric transducer and downhole tool for measuring fluid properties |
| 02/28/2013 | WO2012088058A3 Sampling assembly for a single packer |
| 02/28/2013 | US20130047717 Corrected porosity measurements of underground formations |
| 02/28/2013 | CA2842942A1 Apparatus and method for controlling a completion operation |
| 02/27/2013 | EP2562349A2 Methods and systems for drilling |
| 02/27/2013 | CN202755972U Clamping type environment-friendly sampler with visible liquid level |
| 02/27/2013 | CN202755971U Drill-following controllable source neutron logging instrument |
| 02/27/2013 | CN202755970U Slip ring type natural potential measuring electrode |
| 02/27/2013 | CN202755943U Insert mounting type mixed fluid sampling tube joint |
| 02/27/2013 | CN102947541A Method and apparatus for increasing the yield of a deposit |
| 02/27/2013 | CN102946001A Antenna coupler coupled with logging-while-drilling resistivity apparatus |
| 02/27/2013 | CN102943669A High-accuracy depth domain stochastic simulation inversion method suitable for designing track of horizontal well |
| 02/27/2013 | CN102943662A Salvageable wireless while-drilling electromagnetic wave resistivity measuring nipple |
| 02/27/2013 | CN101499330B 电缆 Cable |
| 02/27/2013 | CN101245702B Constant-power dual side-direction well measuring equipment |
| 02/26/2013 | US8381582 Method and system for monitoring soil properties |
| 02/21/2013 | WO2013023299A1 Reservoir sampling tools and methods |
| 02/21/2013 | WO2012173797A3 Hydrocarbon detection in annulus of well |
| 02/21/2013 | WO2012156875A3 Altering a composition at a location accessed through an elongate conduit |
| 02/21/2013 | WO2012121864A3 Check valve assembly for well stimulation operations |
| 02/21/2013 | CA2844832A1 Reservoir sampling tools and methods |
| 02/21/2013 | CA2798561A1 Apparatus and method for detecting gases conveyed by drilling fluids from subterranean wells |
| 02/20/2013 | CN202745865U Array-type electrode system of induced polarization potential logging instrument |
| 02/20/2013 | CN202745809U Emptying-free sampling valve for oil well |
| 02/20/2013 | CN102937020A Resistivity electronic cabin provided with elastic supporting structure |
| 02/20/2013 | CN102937019A Weak signal generation device |
| 02/20/2013 | CN101793146B Method for testing strata of horizontal well |
| 02/19/2013 | US8380435 Windowed statistical analysis for anomaly detection in geophysical datasets |
| 02/19/2013 | US8376050 Sampling skid for subsea wells |
| 02/14/2013 | WO2013022569A1 Methods for monitoring fluids within or produced from a subterranean formation using opticoanalytical devices |
| 02/14/2013 | WO2013022233A2 Compound sample extraction apparatus |
| 02/14/2013 | WO2013021010A1 Device for extracting at least one gas contained in a circulating fluid |
| 02/14/2013 | WO2012146970A4 Smart hydraulic pumping device for recovering oil and obtaining down-hole information |
| 02/14/2013 | US20130037263 Fluid Sensor and Method of Using Same |
| 02/14/2013 | US20130036811 In-borehole gas monitor apparatus and method comprising a voc concentration analyser and a voc collector |
| 02/14/2013 | CA2843519A1 Methods for monitoring fluids within or produced from a subterranean formation during acidizing operations using opticoanalytical devices |
| 02/14/2013 | CA2843518A1 Methods for monitoring fluids within or produced from a subterranean formation using opticoanalytical devices |
| 02/14/2013 | CA2843341A1 Methods for monitoring the formation and transport of a fracturing fluid using opticoanalytical devices |
| 02/14/2013 | CA2842944A1 Methods for monitoring the formation and transport of a treatment fluid using opticoanalytical devices |
| 02/14/2013 | CA2842196A1 Methods for monitoring fluids within or produced from a subterranean formation during fracturing operations using opticoanalytical devices |
| 02/13/2013 | EP2557265A1 Device for extracting at least one gas contained in a circulating fluid. |
| 02/13/2013 | EP2556213A1 Downhole spectroscopic detection of carbon dioxide and hydrogen sulfide |
| 02/13/2013 | EP2556212A2 Detecting and meausuring a coring sample |
| 02/13/2013 | CN202731911U Magnetic sample bucket |
| 02/13/2013 | CN202731910U Multifunctional gas-liquid separating and filtering and drying device for oil gas well sleeve pipe |
| 02/13/2013 | CN202731909U Portable rock powder extracting device |
| 02/13/2013 | CN202731908U Storage type compensated neutron logging tool |
| 02/13/2013 | CN202731907U Storage type litho-density logger |
| 02/13/2013 | CN202731906U System for monitoring temperature, stress and deformation of shaft freezing wall in real time |
| 02/13/2013 | CN202731905U Formation gas sample transfer metering device |
| 02/13/2013 | CN202731903U One-emitter two-receiver well logging transducer of sound ranger |
| 02/13/2013 | CN202731902U Storage type digital sound wave logger |
| 02/13/2013 | CN202731901U Wired and wireless combined type electromagnetic wave measurement while drilling device used in coal mine |
| 02/13/2013 | CN202731900U Simulating loss device |
| 02/13/2013 | CN202731877U Simulated physical simulation experiment instrument of oil and gas migration and accumulation |
| 02/13/2013 | CN202731875U Dynamic monitoring device of producing well |
| 02/13/2013 | CN202731872U Cable sour rot weak point type headstall |
| 02/13/2013 | CN202731749U Full-hydraulic audio-frequency vibrating drill |
| 02/13/2013 | CN102933962A Method and device for determining the local extension of mineral material in a rock |
| 02/13/2013 | CN102933950A Non-invasive compressibility and in situ density testing of a fluid sample in a sealed chamber |
| 02/13/2013 | CN102933790A Method and apparatus for increasing the yield in a deposit |
| 02/13/2013 | CN102933787A PDC sensing element fabrication process and tool |