| 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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| 04/03/2013 | CN103015970A Simulated detection equipment for measurement-while-drilling resistivity logging instrument |
| 04/03/2013 | CN103015967A Method of controlling direction of toolface of bottom hole assembly for slide drilling |
| 04/03/2013 | CN102108861B Underground layered gas-liquid two phase fluid pressure and temperature-retaining sampling device |
| 04/03/2013 | CN101858209B Synchronous detection method of terrane crack distribution of base plate |
| 04/03/2013 | CN101775982B Microsphere hydraulic sidewall contact device |
| 04/03/2013 | CN101755106B System and method for an AC powered downhole gauge |
| 04/02/2013 | US8408332 Coring tool and method |
| 04/02/2013 | US8408298 Downhole fluid filter |
| 04/02/2013 | US8408296 Methods for borehole measurements of fracturing pressures |
| 04/02/2013 | CA2764396C Radon transformations for removal of noise from seismic data |
| 04/02/2013 | CA2541623C Process for determining the level of at least one given gas contained in drilling mud and associated device and installation |
| 03/28/2013 | WO2013043836A1 Fluid sample cleanup |
| 03/28/2013 | WO2013019554A3 Viscometer for downhole use |
| 03/28/2013 | WO2013019522A3 System and method for sampling multiphase fluid at a production wellsite |
| 03/28/2013 | WO2013016359A3 Automatic optimizing methods for reservoir testing |
| 03/28/2013 | WO2013003269A3 Method for generating a general enhanced oil recovery and waterflood forecasting model |
| 03/28/2013 | US20130080065 Apparatus, computer readable medium, and program code for evaluating rock properties while drilling using downhole acoustic sensors and telemetry system |
| 03/28/2013 | US20130075160 Apparatus, program product, and methods of evaluating rock properties while drilling using downhole acoustic sensors and a downhole broadband transmitting system |
| 03/28/2013 | US20130075159 Method of evaluating rock properties while drilling using downhole acoustic sensors and telemetry system |
| 03/28/2013 | US20130075093 System and method for fluid processing with variable delivery for downhole fluid analysis |
| 03/28/2013 | US20130075088 Single Pump Focused Sampling |
| 03/28/2013 | CA2849144A1 Fluid sample cleanup |
| 03/27/2013 | CN202833431U Valve system of stable pressure maintaining hydraulic pump |
| 03/27/2013 | CN202832526U Layering fluid sample collector in oil well |
| 03/27/2013 | CN202832525U Well mouth sampling observing device |
| 03/27/2013 | CN202832524U Oil extraction shaft mouth antifreezing sampling device |
| 03/27/2013 | CN202832523U Soil sampling device of sandy frozen soil |
| 03/27/2013 | CN202832522U Through casing resistivity logging instrument portable calibration device |
| 03/27/2013 | CN202832521U Electronic resource management initiative (ERMI) microresistivity scanning imaging logger instrument for special use of offshore oil platform |
| 03/27/2013 | CN202832520U System and acoustic logger capable of eliminating interference of direct waves during acoustic logging |
| 03/27/2013 | CN202832495U Sealing connector body |
| 03/27/2013 | CN202832492U Piston balanced type flexible nipple |
| 03/27/2013 | CN202832482U Drilling parameter mobile telephone monitoring system with voice alarming function |
| 03/27/2013 | CN202832481U Well drilling parameter remote monitoring system based on wireless network |
| 03/27/2013 | CN202832480U Two-dimensional quantitative-squeezing visible physical simulation device for petroleum migration and accumulation |
| 03/27/2013 | CN202832479U Underground ultrasonic roof-and-floor measuring device |
| 03/27/2013 | CN103003523A Detection of tool in pipe |
| 03/27/2013 | CN102996122A Electronic cabin with axial and peripheral adjustable resistivity |
| 03/27/2013 | CN102996116A Dynamic mud cake circulating device and using method thereof |
| 03/27/2013 | CN102996114A Inclined hole correction method of logging information |
| 03/27/2013 | CN102996113A Method for testing plugging capacity of polymer while-drilling leakproof plugging drilling system |
| 03/27/2013 | CN102996112A Method for testing plugging capacity of sulphonated polymer while-drilling leakproof plugging system |
| 03/27/2013 | CN102996096A Emptying-free anti-pollution anti-theft sampling valve for oil well |
| 03/27/2013 | CN102992222A Lifting appliance of draw shaft video probe |
| 03/27/2013 | CN101922289B Temperature compensation structure of optical fiber detector for high-temperature oil well |
| 03/27/2013 | CN101915091B Logging frequency matching thin-layer correction method and equipment |
| 03/27/2013 | CN101737039B Multi-functional underground electromagnetic crack detector |
| 03/27/2013 | CN101313128B Protective barriers for small devices |
| 03/21/2013 | WO2013040529A1 Method for measuring formation water salinity from within a borehole |
| 03/21/2013 | WO2013039485A1 Measuring an adsorbing chemical in downhole fluids |
| 03/21/2013 | WO2013009801A3 Estimating a wellbore parameter |
| 03/21/2013 | US20130073207 Characterization Of Subterranean Formation Properties Derived From Quantitative X-Ray CT Scans Of Drill Cuttings |
| 03/21/2013 | US20130068531 Large core sidewall coring |
| 03/21/2013 | US20130068528 Through The Drill String or Core Bit DST System |
| 03/21/2013 | US20130068468 Groundwater sampling device |
| 03/21/2013 | CA2848366A1 Method for selection of surfactants in well stimulation |
| 03/20/2013 | CN202810843U Righting type well bottom sampling guiding head |
| 03/20/2013 | CN202810842U Oil well multifunctional sampling device |
| 03/20/2013 | CN202810841U Pressure return device used for water shut-off and profile control physical simulation experiment |
| 03/20/2013 | CN202810840U Natural gamma magnetic-positioning combination logging instrument |
| 03/20/2013 | CN202810827U Braided river island sand body oil displacement experimental device |
| 03/20/2013 | CN202810757U Standard wellhead flow path device for heavy oil thermal recovery rod-pumped well |
| 03/20/2013 | CN102979520A Horizontal hole ground stress measurement device based on BWSRM (Borehole Wall Stress Relief Method) principle |
| 03/20/2013 | CN102979519A Method and device for measuring resistivity of resistivity equipment with tilt coil |
| 03/20/2013 | CN102979518A Directional gamma probe |
| 03/20/2013 | CN102979517A Method for quantitatively evaluating saturation of complex oil and gas reservoir |
| 03/20/2013 | CN102979516A Workmanship of indoor microscopic oil displacement model |
| 03/20/2013 | CN102979504A Device for simulating oil-gas-water three-phase fluid variable mass flowing in complex structural well shaft |
| 03/20/2013 | CN101892838B Method and device for obtaining high-resolution well logging curve |
| 03/20/2013 | CN101892837B Formation factor determining method and oil saturation determining method |
| 03/20/2013 | CN101832133B Method for judging reservoir fluid type of difference between density porosity and neutron porosity |
| 03/19/2013 | US8401832 Method and system for integrated reservoir and surface facility networks simulations |
| 03/19/2013 | US8400160 Combined propagation and lateral resistivity downhole tool |
| 03/19/2013 | US8397817 Methods for downhole sampling of tight formations |
| 03/19/2013 | CA2788228A1 Borehole resistivity imager using discrete energy pulsing |
| 03/19/2013 | CA2706755C Well gauging system and method |
| 03/19/2013 | CA2690142C In situ determination of critical desorption pressures |
| 03/16/2013 | CA2789718A1 Method and system for measurement of reservoir fluid properties |
| 03/14/2013 | WO2013009567A3 An apparatus, system and method for injecting a fluid into a formation downhole |
| 03/14/2013 | WO2012149003A3 Apparatus and method for estimating formation lithology using x-ray flourescence |
| 03/14/2013 | WO2012142441A3 Undisturbed core sampler |
| 03/14/2013 | WO2012125936A3 Downhole rebound hardness measurement while drilling or wireline logging |
| 03/14/2013 | WO2012109663A3 System and apparatus for modeling the behavior of a drilling assembly |
| 03/14/2013 | US20130062059 Focused sampling of formation fluids |
| 03/14/2013 | DE102011082658A1 Suspensionsentnahmevorrichtung Suspension removal device |
| 03/14/2013 | CA2780446A1 Suspension extraction device |
| 03/13/2013 | CN202795075U Quantitative control device for releasing high-pressure fluid |
| 03/13/2013 | CN202788834U Oil well sampling oil water separating barrel |
| 03/13/2013 | CN202788833U No-clean rapid separating sampler for wellhead |
| 03/13/2013 | CN202788832U Novel casing pipe pressure obtaining device |
| 03/13/2013 | CN202788831U Rolling type detection device convenient to disassemble and assemble |
| 03/13/2013 | CN202788830U Geological logging rock-debris collecting and cleaning device |
| 03/13/2013 | CN202788829U Microcolumn type focused logging instrument |
| 03/13/2013 | CN202788828U Pit shaft device |
| 03/13/2013 | CN202788827U Through drilling tool storage dual laterolog equipment |
| 03/13/2013 | CN202788826U Novel microspherically focused tool |
| 03/13/2013 | CN202788825U Dual laterolog main electrode with dependent upper and lower focusing |
| 03/13/2013 | CN202788824U Quadrupole-source short spacing acoustic full-wave logger |
| 03/13/2013 | CN202788823U Thick-oil reservoir gas injection huff-puff oil extraction physical simulation experiment device |
| 03/13/2013 | CN202788822U Ground graduating device of drill following electromagnetic wave resistivity logger |