Matches 1 - 35 out of 35


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8829899 Pneumatic vibration damping apparatus  
A pneumatic vibration isolating suspension is disclosed for supporting a payload on a moving carrier while suppressing the transmission of vibrations in the 1 to 50 Hz band between the carrier and...
8456159 Stabilization system for sensors on moving platforms  
A stabilized field sensor apparatus collects field data, in particular magnetic field data, with reduced motion noise. The apparatus includes a tear drop shaped housing, a tow frame in the...
8392120 Method and tool for determination of fracture geometry in subterranean formations based on in-situ neutron activation analysis  
A method for determining fracture geometry of a subterranean formation from radiation emitted from a fracture in the formation, including measuring gamma-radiation emitted from the fracture;...
8078444 Method for performing oilfield production operations  
A method is disclosed for optimal lift resource allocation, which includes optimally allocating lift resource under a total lift resource constraint or a total production constraint, the...
7953584 Method for optimal lift gas allocation  
A method is disclosed for optimal lift gas allocation, comprising: optimally allocating lift gas under a total lift gas constraint or a total produced gas constraint, the allocating step including...
7911879 Method of detecting signals in acoustic drill string telemetry  
A method of acoustic telemetry in a drill string in a wellbore, comprises; transmitting an acoustic signal related to a parameter of interest from a transmitting location into the drill string;...
7770663 Apparatus for making quality control measurements while drilling  
Measurements are made continuously with a seismic while drilling (SWD) system and the measured data are stored in a working memory of a downhole processor along with quality control (QC)...
7299884 Seismic measurements while drilling  
Measurements are made continuously with a seismic while drilling (SWD) system and the measured data are stored in a working memory of a downhole processor along with quality control (QC)...
6837332 Method and apparatus for cancellation of unwanted signals in MWD acoustic tools  
An apparatus (10) and method are disclosed for eliminating a noise signal from at least one source during an acoustic measurement of a subsurface geological formation or borehole. The apparatus...
6718265 Petrophysical property estimation using an acoustic calibration relationship  
A method of estimating a petrophysical property of a subsurface area that includes deriving an acoustic calibration relationship correlating acoustic propagation characteristics of a first...
5585556 Method and apparatus for performing measurements while drilling for oil and gas  
A method and equipment are described for performing measurements while drilling for oil or gas, in particular VSP-measurements employing a seismic source together with sensors such as hydrophones...
5513528 Logging while drilling method and apparatus for measuring standoff as a function of angular position within a borehole  
A method and apparatus for measuring formation characteristics as a function of angular distance segments about the borehole is disclosed. The measurement apparatus includes a logging while...
4949575 Formation volumetric evaluation while drilling  
Formation Strength and other measurement while drilling parameters are combined to produce a formation volumetric analysis which may including the traditional volumetric components of clay volume,...
4833914 Pore pressure formation evaluation while drilling  
Formation strength and other measurement while drilling parameters are combined in a formation volumetric analysis which produces not only the traditional volumetric components of clay volume,...
4791797 Density neutron self-consistent caliper  
Two downhole measurement-while-drilling tools, at least one of which is borehole sensitive, are used to make standard measurements of borehole conditions while drilling. From these measurements,...
4747303 Method determining formation dip  
The inclination and slope of a bedding plane are determined from oriented measurements of the bending moment generated as a bit encounters and passes completely through the interface between two...
4617825 Well logging analysis methods for use in complex lithology reservoirs  
Advanced analytic methods and formulas have been developed for 2- and 3- mineral solutions in complex lithology reservoirs. Required logs are density, neutron, acoustic, and photoelectric...
4548071 Determination of oil shale yield from well log data  
Density and resistivity log are utilized to predict the amount of oil which could be produced from a specified volume of oil shale taken from an oil shale formation. Preferably, a sonic log is...
4416151 Method and apparatus for determining in situ hydrocarbon characteristics including hydrogen density  
Method and apparatus for determining the hydrogen and carbon densities of oil in situ in a subsurface geological formation are proposed which utilize the response of a neutron porosity tool to...
4369497 Machine method and apparatus for determining the presence and location of hydrocarbon deposits within a subsurface earth formation  
In accordance with illustrative embodiments of the present invention, methods for processing well logging data comprise deriving measurements of a plurality of earth formation parameters and...
4354381 Sonic attenuating method for distinguishing between oil, water and gas  
A novel method is disclosed for using the resonance behavior of reservoir sand to distinguish between oil-rich, gas-rich and water-rich zones. A wellbore is logged, as for example with a long...
RE30827 Process and device for the determination of the characteristics of the geological formations traversed by a borehole  
Process for determining characteristics of the geological formations traversed by a borehole, making use of a sonde by means of which the intensity of the γ rays naturally radiated from the...
4245313 Method and apparatus for determining characteristics of subsurface earth formations  
In accordance with illustrative embodiments of the present invention, measurements of a plurality of earth formation parameters are combined to produce a new parameter representative of...
4102185 Acoustic-nuclear permeability logging system  
Disclosed is a down hole logging tool featuring a neutron generator, an acoustic disturbance generator, and a radiation detection system. In the embodiment shown, an array of acoustic...
3820390 METHOD OF RECOGNIZING THE PRESENCE OF HYDROCARBONS AND ASSOCIATED FLUIDS IN RESERVOIR ROCKS BELOW THE SURFACE OF THE EARTH  
3721960 METHODS AND APPARATUS FOR PROCESSING WELL LOGGING DATA  
3648515 RADIOACTIVITY LOGGING APPARATUS HAVING SHIELDED WALL CONTACTING SOURCE AND DETECTOR  
A logging apparatus having a subsurface instrument with a partially shielded source and a separate partially shielded detector, both of which contact the borehole wall. Structure combined with the...
3638484 METHODS OF PROCESSING WELL LOGGING DATA  
In accordance with illustrative embodiments of the present invention, techniques for determining certain formation characteristics in shaly sands are disclosed. In one embodiment, porosity data...
3614891 WELL SURVEYING INSTRUMENT AND METHOD  
3608373 METHOD AND WELL LOGGING APPARATUS HAVING ACOUSTIC AND NEUTRON PADS  
3512407 ACOUSTIC AND RADIOACTIVITY LOGGING METHOD AND APPARATUS  
3508439 COMBINATION SIDEWALL NEUTRON POROSITY AND SONIC TOOL  
3311876 Well logging  
3221548 Combination logging system and method  
3186223 Combination logging system  

Matches 1 - 35 out of 35