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Class Information
Number: 324/338
Name: Electricity: measuring and testing > Of geophysical surface or subsurface in situ > With radiant energy or nonconductive-type transmitter > With separate pickup > Within a borehole
Description: Subject matter adapted for use within a drill hole in the earth.










Sub-classes under this class:

Class Number Class Name Patents
324/339 By induction logging 384


Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
8704523 Measuring casing attenuation coefficient for electro-magnetics measurements Apr. 22, 2014
8686917 Locating technique and apparatus using an approximated dipole signal Apr. 1, 2014
8680865 Single well reservoir imaging apparatus and methods Mar. 25, 2014
8680866 Borehole to surface electromagnetic transmitter Mar. 25, 2014
8669765 Estimating a parameter of interest with transverse receiver toroid Mar. 11, 2014
8664958 Antenna of an electromagnetic probe for investigating geological formations Mar. 4, 2014
8648760 Continuous dipole antenna Feb. 11, 2014
8638104 Method for determining spatial distribution of fluid injected into subsurface rock formations Jan. 28, 2014
8614577 Automatic anisotropy, azimuth and dip determination from upscaled image log data Dec. 24, 2013
8598895 System and method to measure dielectric constant in a subterranean well Dec. 3, 2013
8600115 Borehole image reconstruction using inversion and tool spatial sensitivity functions Dec. 3, 2013
8581592 Downhole methods and assemblies employing an at-bit antenna Nov. 12, 2013
8575936 Packer fluid and system and method for remote sensing Nov. 5, 2013
8571797 Determining borehole corrected formation on properties Oct. 29, 2013
8570044 Providing measurements to enable determination of electrical resistivity anisotropy of a subterranean structure Oct. 29, 2013
8558548 Determining anisotropic resistivity Oct. 15, 2013
8547103 Multiple depths of investigation using two transmitters Oct. 1, 2013
8536871 Method of correcting resistivity measurements for toll bending effects Sep. 17, 2013
8536883 Method of measuring a multiphase flow Sep. 17, 2013
8513947 Detection of tool in pipe Aug. 20, 2013
8497673 Directional resistivity antenna shield Jul. 30, 2013
8487625 Performing downhole measurement using tuned transmitters and untuned receivers Jul. 16, 2013
8466682 Apparatus and method for downhole electromagnetic measurement while drilling Jun. 18, 2013
8456166 Single-well through casing induction logging tool Jun. 4, 2013
8441269 Determining formation properties while drilling May. 14, 2013
8427164 Apparatus and method for reducing effects of eccentricity in induction tools Apr. 23, 2013
8417455 Triaxial antenna electromagnetic measurements Apr. 9, 2013
8405397 Method for mitigating leakage currents Mar. 26, 2013
8400158 Imaging in oil-based mud by synchronizing phases of currents injected into a formation Mar. 19, 2013
8395388 Circumferentially spaced magnetic field generating devices Mar. 12, 2013
8378908 Array antenna for measurement-while-drilling Feb. 19, 2013
8378684 Method for determining fluid type in reservoir Feb. 19, 2013
8373418 Subsea electronic modules Feb. 12, 2013
8374558 Antenna array with flexible interconnect for a mobile wireless device Feb. 12, 2013
8362780 Induction coil impedance modeling using equivalent circuit parameters Jan. 29, 2013
8332191 Correction factors for electromagnetic measurements made through conductive material Dec. 11, 2012
8330465 Measuring head and measuring method Dec. 11, 2012
8330463 Protection of a multidirectional antenna Dec. 11, 2012
8310239 Detecting electrical current in a magnetic structure Nov. 13, 2012
8299795 Independently excitable resistivity units Oct. 30, 2012
8294466 Scaled plots of electromagnetic data Oct. 23, 2012
8294468 Method and apparatus for well-bore proximity measurement while drilling Oct. 23, 2012
8289024 Method and apparatus for locating well casings from an adjacent wellbore Oct. 16, 2012
8278928 Apparatus and method for detection of position of a component in an earth formation Oct. 2, 2012
8278930 Deep MWD resistivity measurements using EM shielding Oct. 2, 2012
8278931 Anisotropy orientation image from resistivity measurements for geosteering and formation evaluation Oct. 2, 2012
8274289 Antenna coupling component measurement tool having rotating antenna configuration Sep. 25, 2012
8269501 Methods for magnetic imaging of geological structures Sep. 18, 2012
8264228 Method and apparatus for building a tilted antenna Sep. 11, 2012
8264419 Locating technique and apparatus using an approximated dipole signal Sep. 11, 2012

1 2 3 4 5 6 7 8 9










 
 
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