| 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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| 04/30/2014 | EP2724184A1 Using low frequency for detecting formation structures filled with magnetic fluid |
| 04/30/2014 | CN203572609U Double-bridge pressure sensing type hook load device |
| 04/30/2014 | CN203570310U Device for determining current geostatic stress of oil field by core coherent light experiment |
| 04/30/2014 | CN203570309U Leaking stopping and pressure-bearing capability evaluation device of fractured leaky stratum |
| 04/30/2014 | CN203570308U Formation testing system |
| 04/30/2014 | CN203570307U Graduator system of three-dimensional array induction instrument |
| 04/30/2014 | CN203570306U Composite emitting short joint of acoustic logging instrument |
| 04/30/2014 | CN103758514A Rock core distinguishing and storing structure for side-wall coring instrument |
| 04/30/2014 | CN103758513A Method for evaluating simulation of full-size well wall stability |
| 04/30/2014 | CN103758512A Reaction and seepage characteristic integrated test method and device in oil reservoir |
| 04/30/2014 | CN103758511A Method and device for recognizing hidden reservoirs by underground reverse-time migration imaging |
| 04/30/2014 | CN103758510A Current signal emission source down-hole three-electrode system |
| 04/29/2014 | US8708049 Downhole mixing device for mixing a first fluid with a second fluid |
| 04/29/2014 | US8708042 Apparatus and method for valve actuation |
| 04/24/2014 | WO2014062862A1 System and method for thermally treating a subsurface formation by a heated molten salt mixture |
| 04/24/2014 | WO2014062485A1 Drilling tool system and method of manufacture |
| 04/24/2014 | US20140114577 Method and system of selecting hydrocarbon wells for well testing |
| 04/24/2014 | US20140110108 Fluid sample capture tool |
| 04/23/2014 | EP2721433A1 Systems and methods for measuring parameters of a formation |
| 04/23/2014 | CN203559901U Drilling tool for sampling of frozen mineral |
| 04/23/2014 | CN103748319A Apparatus and method for controlling a completion operation |
| 04/23/2014 | CN103743501A Portable pneumatic pulse ground stress in-situ tester |
| 04/23/2014 | CN103742132A Gas logging data all-hydrocarbon numerical value increase rate calculating method |
| 04/23/2014 | CN103742130A High permeability band characterization method based on time varying |
| 04/23/2014 | CN102330553B Method for identifying dynamic spectrum fluid for MDI (Manual Data Input) test |
| 04/22/2014 | US8706419 System and method for monitoring the change in permeability of a water well |
| 04/22/2014 | CA2733841C System and method for simulating oilfield operations |
| 04/17/2014 | US20140102794 Core orientation systems and methods |
| 04/17/2014 | US20140102714 Drilling tool system and method of manufacture |
| 04/17/2014 | US20140102694 Geophysical surveying |
| 04/17/2014 | US20140102188 Method and apparatus for testing lost circulation materials within a permeability plugging apparatus |
| 04/17/2014 | DE102011112292B4 Verfahren zur Verifikation von Alters-Tiefen-Beziehungen von Gestein in Sedimentbecken A method for verification of age-depth relationships of rocks in sedimentary basins |
| 04/16/2014 | CN203547735U Intersecting type sampler for oil sample of oil well |
| 04/16/2014 | CN203547734U Safe depressurization device of high-temperature high-pressure water loss tester |
| 04/16/2014 | CN203547733U Oil extraction experiment device capable of simulating reservoir pressure supply |
| 04/16/2014 | CN203547732U High temperature high pressure sealing insulation pin |
| 04/16/2014 | CN103733091A Method for determining spacing of hydraulic fractures in a rock formation |
| 04/16/2014 | CN103726841A Portable geological prospecting sampling drill |
| 04/16/2014 | CN103726840A Method and device used for measuring formation directed resistivity |
| 04/16/2014 | CN103726839A Deposit boundary measuring device and method |
| 04/16/2014 | CN103726838A Underground measurement circuit of high-frequency array dielectric logging instrument |
| 04/16/2014 | CN103726837A Experimental device for oil deposit elasticity-gravity displacement simulation |
| 04/16/2014 | CN103726836A Method for extracting mode wave slowness based on acoustic logging information |
| 04/16/2014 | CN103726831A Pole plate electrode system for logging instrument |
| 04/16/2014 | CN103726830A Pole plate assembly for logging instrument |
| 04/16/2014 | CN103726829A Pole plate scale device for logging instrument |
| 04/16/2014 | CN102562138B Active decompression and outburst removal method for coal petrography dynamic disasters of expansion region of high gas-containing coal seam |
| 04/15/2014 | US8700371 System and method for controlling an advancing fluid front of a reservoir |
| 04/15/2014 | US8695414 High pressure and flow rate pump useful in formation fluid sample testing |
| 04/15/2014 | CA2642523C Kerogen extraction from subterranean oil shale resources |
| 04/15/2014 | CA2638399C Removing effects of near surface geology from surface-to-borehole electromagnetic data |
| 04/15/2014 | CA2539249C Apparatus and method for fluid flow measurement with sensor shielding |
| 04/10/2014 | WO2014055818A1 Packer assembly with enhanced sealing layer shape |
| 04/10/2014 | WO2014055651A1 Determining fluid composition downhole from optical spectra |
| 04/10/2014 | WO2014055273A1 Method for enhancing fracture propagation in subterranean formations |
| 04/10/2014 | US20140096957 Fluid control in reservoir fluid samplilng tools |
| 04/10/2014 | US20140096956 System and method of monitoring displacement of a member during a downhole completion operation |
| 04/09/2014 | EP2715067A2 A regulation-compliant holding device for storing or transporting a non-compliant container |
| 04/09/2014 | EP2715065A2 Acoustic triggering devices for multiple fluid samplers and methods of making and using same |
| 04/09/2014 | EP2714572A2 Systems and methods for limiting winch overrun |
| 04/09/2014 | CN203531895U Open and close drilling sampling drill bit |
| 04/09/2014 | CN203531894U Electric soil auger |
| 04/09/2014 | CN203531893U Simulated wire line formation tester |
| 04/09/2014 | CN203531892U Cross connector used for measurement of coal bed gas pressure |
| 04/09/2014 | CN103717834A Measurement pretest drawdown methods and apparatus |
| 04/09/2014 | CN103712834A Indoor truth-preserving sampling, sample storage and analysis device and method based on deep well sampling |
| 04/09/2014 | CN103711484A Borehole imaging device |
| 04/09/2014 | CN103711483A Simulation system and simulation method of hydrocarbon generation, adsorption and desorption of shale |
| 04/09/2014 | CN103711482A Method for quickly identifying clastic rock reservoir based on two well log overlapped picture |
| 04/09/2014 | CN103711481A Instrument pressure-bearing connecting device and structure |
| 04/09/2014 | CN103711480A Horizontal drilling testing device |
| 04/09/2014 | CN103711479A Prompt uranium fission neutron logging technique based on epithermal neutron and thermal neutron ratio |
| 04/09/2014 | CN103711474A Orthogonal dipole acoustic and electric combined logging instrument |
| 04/09/2014 | CN102094625B Constant power dual laterolog equipment circuit and control method thereof |
| 04/09/2014 | CN102094621B Thick film circuit of voltage and current measuring circuit of micro-spherically focused logging instrument |
| 04/09/2014 | CN102042008B Lithologic density short-spacing data acquisition processing thick film circuit |
| 04/09/2014 | CN101963056B Method for predicting carbonate formation pore pressure by using log information |
| 04/08/2014 | CA2708799C Gas trap for drilling mud having quick-release separable lower section |
| 04/08/2014 | CA2532478C System and methods of deriving differential fluid properties of downhole fluids |
| 04/03/2014 | WO2014051595A1 Well tool pressure testing |
| 04/03/2014 | WO2014049234A1 Device for sampling at a depth |
| 04/03/2014 | WO2013012967A8 Using low frequency for detecting formation structures filled with magnetic fluid |
| 04/03/2014 | US20140090893 Obtaining And Evaluating Downhole Samples With A Coring Tool |
| 04/03/2014 | US20140090891 Azimuthal brittleness logging systems and methods |
| 04/02/2014 | EP2712385A1 Reducing trips in well operations |
| 04/02/2014 | CN203515580U Formation testing oil tube liquid drainage sampler |
| 04/02/2014 | CN203515579U Oil filed oil gauging and sampling joint device |
| 04/02/2014 | CN203515578U Anti-freeze anti-theft free-of-emptying oil well sampling device |
| 04/02/2014 | CN203515577U Unbalanced drilling logging detection sampling device |
| 04/02/2014 | CN203515576U Horizontal well process simulation test device |
| 04/02/2014 | CN203515575U Sealing device with limiting function and capable of realizing single layer testing for measuring producing profile |
| 04/02/2014 | CN203515574U Cementing fluid washing efficiency evaluation device |
| 04/02/2014 | CN203515573U Reservoir stratum simulating device |
| 04/02/2014 | CN203515572U Uranium fission instantaneous neutron logging unit based on ratio of epithermal neutrons and thermal neutrons |
| 04/02/2014 | CN203515571U Improved high-temperature and high-pressure sand-filled pipe experiment device |
| 04/02/2014 | CN203515549U Battery encapsulating device for small hole measurement-while-drilling apparatus |
| 04/02/2014 | CN203515469U Oil well antitheft sampling device |
| 04/02/2014 | CN103696766A Specific resistance measurement while drilling device and measurement method thereof |
| 04/02/2014 | CN103696765A Double-LaBr3 detector element energy spectrum logger based on controllable neutron source and logging method |
| 04/02/2014 | CN103696764A Seismic-while-drilling vibration signal acquisition system |