| 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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| 05/04/2011 | CN102042007A Lithologic density long-spacing data acquisition and processing thick film circuit |
| 05/04/2011 | CN102042006A Device for pushing and pulling lithologic density pusher |
| 05/04/2011 | CN102042005A Lithologic density probe fastening screw |
| 05/04/2011 | CN102042004A Natural gamma shockproof probe |
| 05/04/2011 | CN102042003A Digital sound wave and variable-density comprehensive logging instrument |
| 05/04/2011 | CN102042001A Digital acoustic wave multilevel underground instrument capable of realizing real-time automatic gain control |
| 05/04/2011 | CN102041995A System for monitoring complicated oil deposit flooding conditions |
| 05/04/2011 | CN102041994A Hydrogen sulfide early-warning measuring method |
| 05/04/2011 | CN102041993A Rotating short joint for oil well logging |
| 05/04/2011 | CN102041992A Underground backup emergency escape system of logging instrument |
| 05/04/2011 | CN102041990A Sealing structure of rotary bridle |
| 05/04/2011 | CN101050698B Logging unit repair test system and test unit |
| 05/03/2011 | US7934568 Rock core removal method and apparatus |
| 05/03/2011 | CA2462466C Systems and methods for controlling flow control devices |
| 04/28/2011 | WO2011049571A1 Formation fluid sampling control |
| 04/28/2011 | WO2011016642A3 Oil-pressure type fixed piston sampler |
| 04/28/2011 | WO2011013112A3 Phase behavior analysis using a microfluidic platform |
| 04/28/2011 | WO2009056992A3 Reservoir fracture simulation |
| 04/28/2011 | CA2765477A1 Formation fluid sampling control |
| 04/28/2011 | CA2717596A1 Pay zone prediction |
| 04/27/2011 | EP2315000A2 Methods and apparatus to determine phase-change pressures |
| 04/27/2011 | EP2313610A2 Formation evaluation instrument and method |
| 04/27/2011 | CN201810306U Hydrogeological parameter observation instrument used for singly drilling underground |
| 04/27/2011 | CN201810305U Positioning and propelling device in three-component seismometer hole |
| 04/27/2011 | CN201810304U Device for detecting high-temperature static initial setting time of compound plugging agent |
| 04/27/2011 | CN201810297U Tangentially polarized monopole transducer of multi-pole acoustic array logging |
| 04/27/2011 | CN201810271U Downhole well opening and closing device for directly reading and storing during coal bed methane testing |
| 04/27/2011 | CN201810268U Non-emptying liquid sampling valve for oil field |
| 04/27/2011 | CN1995699B Gas pretreatment device for logging and its alarming controller |
| 04/27/2011 | CN102035387A Logging instrument underground pushing power supply system with on need of cable cores |
| 04/27/2011 | CN102031967A Layered flow test method and flow regulator used in same |
| 04/27/2011 | CN102031966A Mobile oil quantitative control method of oil-water imbibition rock |
| 04/27/2011 | CN102031965A Oil-gas reservoir physical simulation wellbore radius processing method |
| 04/27/2011 | CN102031964A Multilevel workflow method for extracting resistivity anisotropy data from 3d induction measurements |
| 04/27/2011 | CN102031963A Antimagnetic structure of natural gamma ray logging instrument probe |
| 04/27/2011 | CN102031958A Underground instrument maintenance and calibration system |
| 04/27/2011 | CN102031956A Built-in method of oil deposit physical model mineshaft |
| 04/26/2011 | CA2638635C Creep determination technique |
| 04/21/2011 | WO2011047236A1 Surface gas evaluation during controlled pressure drilling |
| 04/21/2011 | WO2011045700A1 Methods and apparatus for downhole characterization of emulsion stability |
| 04/21/2011 | WO2010151661A4 Sampling skid for subsea wells |
| 04/21/2011 | US20110088947 Process for determining the presence and/or quantity of h2s in subsoil and related apparatus |
| 04/21/2011 | US20110088894 Methods, apparatus and articles of manufacture to measure gas reservoir formation pressures |
| 04/21/2011 | CA2777297A1 Methods and apparatus for downhole characterization of emulsion stability |
| 04/21/2011 | CA2742387A1 Surface gas evaluation during controlled pressure drilling |
| 04/21/2011 | CA2718121A1 Method for interpreting repetitive seismic recordings utilizing the seismic frequency band in the evaluation of pore pressure |
| 04/20/2011 | CN201802397U Electricity powered sampling switch device |
| 04/20/2011 | CN201802396U High-temperature salt-resistant double-core dynamic filter press |
| 04/20/2011 | CN201802395U Dual laterolog tool |
| 04/20/2011 | CN201802387U Thick film circuit for logging signal ground acquisition and preprocessing |
| 04/20/2011 | CN201802386U Signal detection thick film circuit for micro-resistivity well circumference imaging logger |
| 04/20/2011 | CN102022115A Quantitative needle tube sample injection system and method |
| 04/20/2011 | CN102022114A Automatic sand pack tube model compaction device for physical simulation |
| 04/20/2011 | CN102022113A Test method for monitoring stresses of flow field and interlayer during cavity constructing period of oil depot |
| 04/20/2011 | CN102022112A Intelligent oil well simulation experiment system and working method |
| 04/20/2011 | CN102022111A Method for detecting azimuth of damaged oilfield downhole casing |
| 04/20/2011 | CN102022109A Communication line routing device of subsurface equipment |
| 04/20/2011 | CN102022107A Method for establishing physical model capable of predicting waterflooding of fractured anisotropic oil reservoirs |
| 04/19/2011 | US7926562 Continuous fibers for use in hydraulic fracturing applications |
| 04/19/2011 | US7926342 Apparatus for actuating a pressure delivery system of a fluid sampler |
| 04/14/2011 | WO2011044427A2 Automated sidewall coring |
| 04/14/2011 | WO2011044071A2 Cooling apparatus and methods for use with downhole tools |
| 04/14/2011 | WO2011044070A2 Formation testing planning and monitoring |
| 04/14/2011 | WO2011043890A2 Formation testing |
| 04/14/2011 | WO2011042448A2 Managing flow testing and the results thereof for hydrocarbon wells |
| 04/14/2011 | US20110083901 Core drilling tools with external fluid pathways |
| 04/14/2011 | US20110083501 Vibrating wire viscometers |
| 04/14/2011 | CA2776858A1 Method and apparatus for drilling a probabilistic approach |
| 04/13/2011 | EP2307911A2 Surveying a subterranean structure using electromagnetic measurements and microorganism content data |
| 04/13/2011 | EP2307664A1 Single packer system for use in a wellbore |
| 04/13/2011 | CN201794586U Well cementing wall packing channeling checking instrument |
| 04/13/2011 | CN201794585U Device for acquiring oil sample from water-containing oil well |
| 04/13/2011 | CN201794584U Three-combination logging instrument |
| 04/13/2011 | CN201794583U Well completion evaluation experiment device for coal bed methane cave |
| 04/13/2011 | CN201794582U Lifting-lowering full-bore formation tester |
| 04/13/2011 | CN201794550U Blowout prevention plug for separate layer testing of well |
| 04/13/2011 | CN1826455B Downhole pv tests for bubble point pressure |
| 04/13/2011 | CN102016228A Method of miscible injection testing of oil wells and system thereof |
| 04/13/2011 | CN102011584A Rock powder extractor |
| 04/13/2011 | CN102011583A Method for identifying reservoir by combining electrical imaging and reef geologic model |
| 04/13/2011 | CN102011582A Apparatus for testing rock drillability under stratum condition |
| 04/13/2011 | CN102011581A Simulated evaluation device for well-drilling plugging of stress sensitivity stratum |
| 04/13/2011 | CN102011580A Method for predicting failure pressure of reservoir with acid damage |
| 04/13/2011 | CN102011579A Large-size interlayer-containing salt cavity-manufacturing test method |
| 04/13/2011 | CN102011578A Oil reservoir sand production simulation sand filling experiment device |
| 04/13/2011 | CN102011575A Method for optimizing structure of annular water retention rate logging sensor array |
| 04/13/2011 | CN101240707B Geological borehole wall rock strain measurement device |
| 04/13/2011 | CN101050701B Non-intervention type capacitor oil medium sensor |
| 04/13/2011 | CN101025084B Method for predicting formation pore pressure under drill-bit while drilling |
| 04/12/2011 | US7921910 Tagged propping agents and related methods |
| 04/12/2011 | US7921909 Method for breaking fracture fluids |
| 04/12/2011 | CA2594461C Formation fluid sampling apparatus and methods |
| 04/09/2011 | CA2716698A1 Sampling system and method |
| 04/07/2011 | WO2011041577A2 Pump-in seal |
| 04/07/2011 | WO2011040924A1 Determining anisotropy with a formation tester in a deviated borehole |
| 04/07/2011 | WO2009077867A3 Technique and apparatus to perform a leak off test in a well |
| 04/07/2011 | US20110079436 Core drilling tools with retractably lockable driven latch mechanisms |
| 04/07/2011 | US20110079435 Driven latch mechanism |
| 04/07/2011 | CA2776460A1 Pump-in seal |
| 04/06/2011 | EP2304176A2 Methods and apparatus for characterization of petroleum fluids contaminated with drilling mud |