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Class Information
Number: 73/152.05
Name: Measuring and testing > Borehole or drilling (e.g., drill loading factor, drilling rate, rate of fluid flow) > Formation logging (e.g., borehole studies of pressure derivatives or of pressure-temperature derivatives) > Density, porosity, or permeability
Description: Subject matter wherein the determination of the physical characteristic of the formation is made by measuring (a) a mass per unit volume of either a bulk formation of a borehole or of selected constituents of a formation of a borehole, (b) the ratio of a volume of interstices of either a bulk formation of a borehole or of selected constituents of a formation of a borehole to its volume, or (c) a quality of either a bulk formation of a borehole or of selected constituents of a formation of a borehole to be penetrated by a liquid or a gas passing through pores or openings therein.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7301852 |
Methods of generating directional low frequency acoustic signals and reflected signal detection enhancements for seismic while drilling applications |
Nov. 27, 2007 |
| 7231818 |
Determining horizontal and vertical permeabilities by analyzing two pretests in a horizontal well |
Jun. 19, 2007 |
| 7181960 |
Determination of correct horizontal and vertical permeabilities in a deviated well |
Feb. 27, 2007 |
| 7178391 |
Insertion tube methods and apparatus |
Feb. 20, 2007 |
| 7150188 |
Non-invasive measurement of fluid-pressure diffusivity using electro-osmosis |
Dec. 19, 2006 |
| 7059179 |
Multi-probe pressure transient analysis for determination of horizontal permeability, anisotropy and skin in an earth formation |
Jun. 13, 2006 |
| 7040169 |
Use of cuttings for real time attenuation prediction |
May. 9, 2006 |
| 7036362 |
Downhole determination of formation fluid properties |
May. 2, 2006 |
| 7031841 |
Method for determining pressure of earth formations |
Apr. 18, 2006 |
| 7011155 |
Formation testing apparatus and method for optimizing draw down |
Mar. 14, 2006 |
| 6976386 |
Tensiometer methods |
Dec. 20, 2005 |
| 6971260 |
Overburden rock core sample containment system |
Dec. 6, 2005 |
| 6968274 |
Use of cutting velocities for real time pore pressure and fracture gradient prediction |
Nov. 22, 2005 |
| 6928864 |
Tool assembly and monitoring applications using same |
Aug. 16, 2005 |
| 6918293 |
System and method having radiation intensity measurements with standoff correction |
Jul. 19, 2005 |
| 6898967 |
Azimuthal resistivity using a non-directional device |
May. 31, 2005 |
| 6871532 |
Method and apparatus for pore pressure monitoring |
Mar. 29, 2005 |
| 6860147 |
Process for predicting porosity and permeability of a coal bed |
Mar. 1, 2005 |
| 6843118 |
Formation tester pretest using pulsed flow rate control |
Jan. 18, 2005 |
| 6814162 |
One cone bit with interchangeable cutting structures, a box-end connection, and integral sensory devices |
Nov. 9, 2004 |
| 6772621 |
Tensiometer methods and apparatus |
Aug. 10, 2004 |
| 6715347 |
Apparatus and method for determining measures of the permeability of HC-bearing formations using fluorescence |
Apr. 6, 2004 |
| 6672386 |
Method for in-situ analysis of formation parameters |
Jan. 6, 2004 |
| 6640625 |
Method and apparatus for measuring fluid density downhole |
Nov. 4, 2003 |
| 6581685 |
Method for determining formation characteristics in a perforated wellbore |
Jun. 24, 2003 |
| 6571605 |
Constant-head soil permeameter for determining the hydraulic conductivity of earthen materials |
Jun. 3, 2003 |
| 6453727 |
Method of evaluating physical parameters of an underground reservoir from rock cuttings taken therefrom |
Sep. 24, 2002 |
| 6452395 |
Enhanced detection method |
Sep. 17, 2002 |
| 6415648 |
Method for measuring reservoir permeability using slow compressional waves |
Jul. 9, 2002 |
| 6263726 |
Sidewall tensiometer and method of determining soil moisture potential in below-grade earthen soil |
Jul. 24, 2001 |
| 6047595 |
Method of determining the permeability of sedimentary strata using NMR data |
Apr. 11, 2000 |
| 5992228 |
Method for determining resistivity derived porosity and porosity derived resistivity |
Nov. 30, 1999 |
| 5974859 |
Method and apparatus for measuring coupled flow, transport, and reaction processes under liquid unsaturated flow conditions |
Nov. 2, 1999 |
| 5965810 |
Method for determining sedimentary rock pore pressure caused by effective stress unloading |
Oct. 12, 1999 |
| 5963037 |
Method for generating a flow profile of a wellbore using resistivity logs |
Oct. 5, 1999 |
| 5869755 |
Porosity estimation method in carbonate rock |
Feb. 9, 1999 |
| 5859367 |
Method for determining sedimentary rock pore pressure caused by effective stress unloading |
Jan. 12, 1999 |
| 5841280 |
Apparatus and method for combined acoustic and seismoelectric logging measurements |
Nov. 24, 1998 |
| 5832409 |
Automated gas permeameter |
Nov. 3, 1998 |
| 5821413 |
Gravity gradiometry in a wellbore using a virtual long-baseline |
Oct. 13, 1998 |
| 5812068 |
Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto |
Sep. 22, 1998 |
| 5784333 |
Method for estimating permeability of earth formations by processing stoneley waves from an acoustic wellbore logging instrument |
Jul. 21, 1998 |
| 5770798 |
Variable diameter probe for detecting formation damage |
Jun. 23, 1998 |
| 5736636 |
Probe for radiologically determining the density of rock in a drilled well |
Apr. 7, 1998 |
| 5708204 |
Fluid flow rate analysis method for wireline formation testing tools |
Jan. 13, 1998 |
| 5703286 |
Method of formation testing |
Dec. 30, 1997 |
| 5687138 |
Methods of analyzing stoneley waveforms and characterizing underground formations |
Nov. 11, 1997 |
| 5663073 |
Earth formation porosity estimation method |
Sep. 2, 1997 |
| 5644076 |
Wireline formation tester supercharge correction method |
Jul. 1, 1997 |
| 5616840 |
Method for estimating the hydraulic conductivity of a borehole sidewall fracture |
Apr. 1, 1997 |
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