| 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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| 12/24/2008 | CN201170095Y Wing rib telescopic density logger following with drilling |
| 12/24/2008 | CN101328806A Optical wellbore fluid characteristic sensor |
| 12/24/2008 | CN101328805A Method and apparatus for measuring free induction decay signal and its application to composition analysis |
| 12/24/2008 | CN101328804A Downhole tool having an extendable component and method for disengaging from well bore wall |
| 12/24/2008 | CN101328803A Controlling a dynamic signal range in an optical time domain reflectometry |
| 12/24/2008 | CN101328800A Cooling systems for downhole tools |
| 12/24/2008 | CN101328786A Automatic grouting control method and control system of well drilling |
| 12/24/2008 | CN100445725C Optical fluid analysis signal refinement |
| 12/23/2008 | CA2525065C Wellbores utilizing fiber optic-based sensors and operating devices |
| 12/22/2008 | CA2635574A1 Floating bubble jar gas dryer for mud gas analyzer |
| 12/18/2008 | WO2008153698A1 Hydraulic pump-drive downhole fluids pump with linear driver |
| 12/18/2008 | WO2008152345A2 Multi-zone formation fluid evaluation system and method for use of same |
| 12/18/2008 | WO2008079882A3 Integrated flow control device and isolation element |
| 12/18/2008 | US20080307877 Perforation Logging Tool and Method |
| 12/18/2008 | US20080307875 Multi-Resolution Borehole Profiling |
| 12/17/2008 | CN201166710Y Well-logging radiodetector apparatus |
| 12/17/2008 | CN201165872Y Oil well head bulk sample extracting apparatus |
| 12/17/2008 | CN201165871Y High temperature and high pressure core filtering loss instrument |
| 12/17/2008 | CN101324176A Spring self-switching type Y-shaped joint |
| 12/16/2008 | US7464755 Methods and systems for sampling heavy oil reservoirs |
| 12/11/2008 | WO2008151000A1 Downhole pressure chamber and method of making same |
| 12/11/2008 | WO2008150877A1 Automated field development planning of well and drainage locations |
| 12/11/2008 | WO2008150825A1 Methods and apparatus to sample heavy oil from a subteranean formation |
| 12/11/2008 | WO2008149240A2 Bit for drilling wells and associated drilling method |
| 12/11/2008 | WO2008148412A1 Pump apparatus and method for testing a water-carrying test horizon |
| 12/11/2008 | DE19745947B4 Vorrichtung und Verfahren zum Bohren von Erdformationen Apparatus and method for drilling earth formations |
| 12/11/2008 | CA2837916A1 Methods and apparatus to sample heavy oil from a subteranean formation |
| 12/11/2008 | CA2687372A1 Methods and apparatus to sample heavy oil from a subteranean formation |
| 12/11/2008 | CA2685065A1 Bit for drilling wells and associated drilling method |
| 12/10/2008 | EP2000630A1 Downhole 4D pressure measurement apparatus and method for permeability characterization |
| 12/10/2008 | EP1999342A2 Drill bit assembly with a logging device |
| 12/10/2008 | CN201162511Y Underbalance pressurized logging apparatus |
| 12/10/2008 | CN101319611A Devices, systems and methods for assessing porous media properties |
| 12/10/2008 | CN101319609A Underbalanced drilling parameter prediction technique |
| 12/04/2008 | WO2008147762A1 Method of fracturing an earth formation, earth formation borehole system, method of producing a mineral hydrocarbon substance |
| 12/04/2008 | WO2008066544A3 APPARATUS AND METHODS FOR SIDEWALL PERCUSSªON CORING USING A VOLTAGE ACTIVATED IGNITER |
| 12/04/2008 | US20080296069 Novel core drill bit housing and core drill bit |
| 12/04/2008 | US20080295588 Formation tester tool seal pad |
| 12/03/2008 | EP1257730B1 Apparatus and method for controlling well fluid sample pressure |
| 12/03/2008 | CN101315030A Methods and apparatus to sample heavy oil from a subteranean formation |
| 12/03/2008 | CN101315027A Apparatus for detecting transmitted signal of electromagnetic wave logging instrument |
| 12/03/2008 | CN101315024A Jackrod one-way pump injection type sealing/sealing releasing device for hole-inside base |
| 12/02/2008 | US7458419 Apparatus and method for formation evaluation |
| 12/02/2008 | CA2384810C Determining optimal well locations from a 3d reservoir model |
| 11/27/2008 | WO2008144165A1 Method and apparatus for automated fluid loss measurements of drilling fluids |
| 11/27/2008 | WO2008144164A1 Reusable filters for fluid loss measurements of drilling fluids |
| 11/27/2008 | WO2007146801A3 Measurement while drilling tool with interconnect assembly |
| 11/26/2008 | CN201155326Y Hydrocarbon monitoring cable possessing absorption layer |
| 11/26/2008 | CN101313128A Protective barriers for small devices |
| 11/26/2008 | CN101311495A X-ray tool for an oilfield fluid |
| 11/25/2008 | US7455107 Well jet device for logging horizontal wells and the operating method thereof |
| 11/25/2008 | CA2377467C Cavity stability prediction method for wellbores |
| 11/20/2008 | US20080288226 Integrated Resevoir optimization |
| 11/20/2008 | US20080283298 Core stabilization |
| 11/20/2008 | US20080283296 Liquid and solids analysis of drilling fluids using fractionation and imaging |
| 11/20/2008 | US20080283294 Apparatus and Method for Continuous Measurement of a Physical Property of a Drilling Fluid |
| 11/20/2008 | US20080282790 Method and Apparatus for Characterizing Coal Tar in Soil |
| 11/19/2008 | EP1991757A2 System for injecting a substance into the space surrounding a well tubular |
| 11/19/2008 | CN201152171Y Drilling mud integral parameter measuring equipment |
| 11/19/2008 | CN101309853A Apparatus for downhole fluids analysis utilizing micro electro mechanical systems (mems) or other sensors |
| 11/19/2008 | CN101308062A Self sealed self decompressed coal seam sampling method and apparatus |
| 11/19/2008 | CN100434727C Well jet device for logging horizontal wells and the operating method thereof |
| 11/18/2008 | US7453266 Electronic humidity chamber for vapor desorption to determine high capillary pressures |
| 11/18/2008 | US7451819 Openhole perforating |
| 11/18/2008 | CA2547584C Method, system and tool for reservoir evaluation and well testing during drilling operations |
| 11/12/2008 | EP1989397A1 Logging tool for hydrocarbon-producing wells |
| 11/12/2008 | CN201148867Y Oil well dynamoelectric fast-sampling device |
| 11/12/2008 | CN201148866Y Drill oscillation type permeability coefficient value test data collecting device |
| 11/12/2008 | CN201148839Y Repeatedly-usable prospecting bore bit |
| 11/12/2008 | CN101305160A High pressure optical cell for a downhole optical fluid analyzer |
| 11/12/2008 | CN101302922A Construction method of horizontal orienting drill crossing sand cobble and gravel formation |
| 11/12/2008 | CN100432372C Method for determining pressure of earth formations |
| 11/11/2008 | US7451066 Near wellbore modeling method and apparatus |
| 11/06/2008 | WO2008132415A1 Device for protecting a geotechnical or geophysical probe |
| 11/06/2008 | WO2008131772A2 Drilling system with a barrel drilling head driven by a downhole tractor |
| 11/06/2008 | WO2008109102A3 Portable core flood apparatus for conducting on-site permeability measurements |
| 11/06/2008 | WO2008042555A3 Measurement of standoff corrected photoelectric factor |
| 11/06/2008 | WO2005084332A3 Methods for measuring a formation supercharge pressure |
| 11/06/2008 | CA2682353A1 Device for protecting a geotechnical or geophysical probe |
| 11/05/2008 | EP1988254A2 Cable downhole gas chromatograph and a downhole gas chromatography method |
| 11/05/2008 | EP1987345A2 A method and apparatus for a downhole spectrometer based on tunable optical filters |
| 11/05/2008 | EP1987342A2 Method and system for sampling dissolved gas |
| 11/05/2008 | EP1987228A2 A method and apparatus for ion-selective discriminaion of fluids downhole |
| 11/05/2008 | CN201144697Y Suction type polymer sampler |
| 11/05/2008 | CN201144696Y Drilling oscillatory type permeability coefficient value test device |
| 11/05/2008 | CN201144690Y Casing horizontal well logging device |
| 11/05/2008 | CN201144689Y Quick change type logging winch |
| 11/05/2008 | CN201144688Y Aggregate unit of multi-arm caliper and electromagnetic flaw detector |
| 11/05/2008 | CN201144687Y Polar plate protective rack of micro-sphere focus logging tool |
| 11/05/2008 | CN201144663Y Special electrical heating plug for winter test of separate injection well |
| 11/04/2008 | US7445934 Purity of brine; measuring resistivity, porosity and neutron cross section; apparatus includes probe, refractometer and storage unit; |
| 11/04/2008 | US7445043 System and method for detecting pressure disturbances in a formation while performing an operation |
| 10/30/2008 | WO2008130876A1 Running tool for expandable liner hanger and associated methods |
| 10/30/2008 | WO2008130346A1 Petrophysical fluid property determination |
| 10/30/2008 | WO2006105432A3 Determining viscosity of fluids from well logs using electroseismic measurements |
| 10/30/2008 | CA2684547A1 Running tool for expandable liner hanger and associated methods |
| 10/29/2008 | EP1984599A2 Kerogen extraction from subterranean oil shale resources |
| 10/29/2008 | CN201141807Y Direct-connection type deep borehole wire-line coring drilling rod |
| 10/29/2008 | CN201141303Y Automatic measuring device for viscosity of drilling fluids |
| 10/29/2008 | CN201141302Y Emptying-free anti-theft sampler |