| 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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| 06/19/2013 | CN101942987B Simple sonic logger detection, calibration and ruling method |
| 06/19/2013 | CN101699028B System for controlling positioning arm of logging tool |
| 06/19/2013 | CN101688438B Running tool for expandable liner hanger and associated methods |
| 06/19/2013 | CN101560879B Well test analysis control method for low permeability gas reservoir and method thereof |
| 06/19/2013 | CN101498214B Measuring and calculating method for eccentric circular pipe power-law fluid in annulus |
| 06/19/2013 | CN101446196B Well test analysis method and device of treble medium oil pool branch horizontal well |
| 06/18/2013 | US8464791 Arm system for logging a wellbore and method for using same |
| 06/18/2013 | US8464790 Brine salinity from sound speed |
| 06/18/2013 | CA2600657C Radon transformations for removal of noise from seismic data |
| 06/13/2013 | WO2013085672A1 Fiber optic measurement of parameters for downhole pump diffuser section |
| 06/13/2013 | WO2013009501A3 Cnt fiber based impedance spectroscopy for characterizing downhole fluids |
| 06/13/2013 | US20130145837 Downhole Sensor Systems and Methods Thereof |
| 06/12/2013 | CN202991025U Electromechanical integral subsurface sampler |
| 06/12/2013 | CN202991024U Multiphase flow logger by full flow collecting dynamic interface tracking method |
| 06/12/2013 | CN202991023U Downhole drilling fluid extraction device |
| 06/12/2013 | CN202991022U Underground turbine drilling fluid drainage device |
| 06/12/2013 | CN202991019U Acoustic logging transmitting transducer driving system |
| 06/12/2013 | CN202991011U Polar plate assembly for logging instrument |
| 06/12/2013 | CN202991007U Multi-parameter logger |
| 06/12/2013 | CN202990916U Mechanical hand equipment for automatic reconnaissance drilling machine |
| 06/12/2013 | CN1896459B System and methods of deriving differential fluid properties of downhole fluids |
| 06/12/2013 | CN103147749A Novel physical model experiment device for two-dimensional heterogeneous reservoir bed |
| 06/12/2013 | CN103147747A Acoustic logging-while-drilling device and acoustic logging-while-drilling method |
| 06/12/2013 | CN103147744A Spectral measurement device of horizontal well fluid flowing parameter |
| 06/12/2013 | CN103147737A Drilling detection method for disclosing law of overburden failure in ascending mining |
| 06/12/2013 | CN102691497B Method for predicting drillable level value of rock under different well bottom differential pressures |
| 06/12/2013 | CN101440705B Super-deep well wireless transmission well testing system |
| 06/11/2013 | US8459352 Selective placement of conformance treatments in multi-zone well completions |
| 06/11/2013 | US8459285 Slug mitigation |
| 06/06/2013 | WO2013082446A1 Optical spectrometer and downhole spectrometry method |
| 06/06/2013 | WO2013082433A1 Sampling tool having mulit-port multi-position valve |
| 06/06/2013 | WO2013082055A1 Formation fluid sampling |
| 06/06/2013 | WO2013081986A1 Modular pumpouts and flowline architecture |
| 06/06/2013 | WO2013081808A1 Marine isolation assembly |
| 06/06/2013 | WO2013081782A1 Probe packer and method of using same |
| 06/06/2013 | WO2013081775A1 Use of downhole pressure measurements while drilling to detect and mitigate influxes |
| 06/06/2013 | WO2012168614A3 Method for determing the complex response of a permeable stratum |
| 06/06/2013 | CA2856578A1 Marine isolation assembly |
| 06/06/2013 | CA2856525A1 Modular pumpouts and flowline architecture |
| 06/06/2013 | CA2852710A1 Use of downhole pressure measurements while drilling to detect and mitigate influxes |
| 06/05/2013 | EP2599954A2 Probe packer and method of using same |
| 06/05/2013 | CN202977919U Portable connection structure of coaxial shielding line between sealing cavities at high temperature and under high pressure |
| 06/05/2013 | CN202970707U Soil-sampling clamp spring for loosen soil terrain |
| 06/05/2013 | CN202970696U Detection device used for draw shaft well wall scanning |
| 06/05/2013 | CN202970695U Panoramic scanning system used for mine |
| 06/05/2013 | CN202970691U Device for hoisting draw shaft detector |
| 06/05/2013 | CN202970685U Oil field deep well detection control system |
| 06/05/2013 | CN103132995A Product sampling system within subsea tree |
| 06/05/2013 | CN103132994A Under-well while-drilling hydrogen sulfide detection device |
| 06/05/2013 | CN103132993A Method for gradually recognizing oil layer and water layer in low-permeability complex lithologic oil deposit |
| 06/05/2013 | CN103132987A Probe thread guide structure of three-component induction coil array |
| 06/05/2013 | CN102230374B Underground program remote update device based on 485 bus |
| 06/05/2013 | CN102155213B Dynamic detection method for mine mining-induced fracture |
| 06/05/2013 | CN102071929B Method for generating dolomite reservoir geochemical plate |
| 06/05/2013 | CN102052070B Complex lithology clastic rock stratum constituent logging processing method |
| 06/05/2013 | CN102022111B Method for detecting azimuth of damaged oilfield downhole casing |
| 06/05/2013 | CN102003171B Calibrating device of three-dimensional induction logger |
| 06/05/2013 | CN101936157B Method for detecting pore pressure of high pressure saltwater layer by using log information |
| 06/05/2013 | CN101899973B Method for measuring formation water resistivity and device thereof |
| 06/05/2013 | CN101864950B Prediction method of continuous and compact sandstone gas distribution |
| 06/05/2013 | CN101603423B Direct current method for bed-parallel advanced detection of water bearing structure in mine tunnel |
| 06/05/2013 | CN101441185B High pressure/high temperature magnetic resonance tool |
| 06/04/2013 | US8453766 Hydrocarbon formation core protection and transportation apparatus |
| 06/04/2013 | US8453732 Apparatus to sample heavy oil from a subterranean formation |
| 06/04/2013 | US8453731 Apparatus and method for estimating formation properties using nanoexplosive elements |
| 06/04/2013 | US8453725 Compliant packers for formation testers |
| 06/04/2013 | CA2463413C Testing drill packer |
| 05/30/2013 | US20130133885 Formation Fluid Sampling |
| 05/29/2013 | EP2597252A2 Compact surface well testing system and method |
| 05/29/2013 | EP2596205A1 Small core generation and analysis at-bit as lwd tool |
| 05/29/2013 | CN202954812U Emptying-free sampling device |
| 05/29/2013 | CN202954811U Direction gamma probe |
| 05/29/2013 | CN202954810U Deuterium tritium controllable source neutron porosity logging instrument |
| 05/29/2013 | CN103122762A Detection method and device for effective fractured intervals in unconventional shale oil and gas reservoir |
| 05/29/2013 | CN102182446B Mine monitoring method and equipment |
| 05/29/2013 | CN102071928B Method for identifying lithology of three-dimensional volcanic rock |
| 05/29/2013 | CN102031966B Mobile oil quantitative control method of oil-water imbibition rock |
| 05/29/2013 | CN101942997B Cementing wall packer channeling checking instrument |
| 05/29/2013 | CN101936159B Method for recognizing lithological characters while drilling |
| 05/29/2013 | CN101059076B Method for evaluating cementing of underground pipe and force contact of borehole wall |
| 05/28/2013 | US8448720 Optimized pressure drilling with continuous tubing drill string |
| 05/28/2013 | US8448703 Downhole formation tester apparatus and methods |
| 05/23/2013 | WO2013049775A3 Scintillation detection device with pressure sensitive adhesive |
| 05/23/2013 | WO2012103069A3 Method and apparatus for evaluating fluid sample contamination by using multi sensors |
| 05/23/2013 | US20130131989 Apparatus and computer readable medium for determining well characteristics and pore architecture utilizing conventional well logs |
| 05/23/2013 | CA2856128A1 Well testing |
| 05/23/2013 | CA2845831A1 Perforating stimulation bullet |
| 05/22/2013 | EP2594730A1 Modular downhole tool |
| 05/22/2013 | CN202946151U Device for simulating and evaluating reservoir damage caused by working fluid |
| 05/22/2013 | CN202946150U Formation pressure detection telescopic device |
| 05/22/2013 | CN202946149U Logging while drilling natural gamma logging instrument |
| 05/22/2013 | CN202946135U Double-U-pipe type high-temperature high-pressure sensor of fluid density |
| 05/22/2013 | CN103114851A Gas generating contribution capacity testing device of coal seams with different fracture development levels |
| 05/22/2013 | CN103114850A Three-dimensional visual physical simulation experimental device |
| 05/22/2013 | CN103114849A Core sealing device and sealing method thereof |
| 05/22/2013 | CN103114848A Formation fracture space reconstruction method based on rock core measure |
| 05/22/2013 | CN103114842A Experimental facility and model system thereof for simulating thickened oil steam huff and puff oil extraction |
| 05/22/2013 | CN102162357B Method for testing in-situ internal stress of vertical shaft wall |
| 05/22/2013 | CN102011583B Method for identifying reservoir by combining electrical imaging and reef geologic model |
| 05/21/2013 | US8444937 In-situ soil nitrate ion concentration sensor |