Patent application number | Description | Published |
20090001989 | ONE ROW WAVELET SENSOR LAYOUT FOR RESISTIVITY IMAGING - A sensor electrode for imaging a formation, includes a geometry that one of reduces or substantially limits spatial aliasing in formation data, the aliasing resulting from imaging the formation with an array of the sensor electrodes. A method and a computer program product for designing sensor electrodes are provided. A sensor with a one-row wavelet geometry is disclosed. | 01-01-2009 |
20090283265 | FORMATION TESTING APPARATUS AND METHODS - A formation testing apparatus and method are disclosed. In one aspect, a fluid is drawn from a formation, one or more sensors measure pressure of the fluid during the during drawing of the fluid, and a processor estimates an inflection point from the pressure measurements and controls the drawing of the fluid from the inflection point until the pressure of the fluid drops to a selected level. | 11-19-2009 |
20100114492 | SYSTEM AND METHOD FOR MEASURING RESISTIVITY PARAMETERS OF AN EARTH FORMATION - Disclosed herein is a method of measuring a resistivity parameter of an earth formation. The method includes: applying a first electric measurement current including a first series of pulses to a first electrode and inducing a first formation current in the earth formation; applying a second electric measurement current including a second series of pulses to a second electrode and inducing a second formation current in the earth formation, the first series of pulses and the second series of pulses occupying distinct portions of a time domain in a selected time window; measuring the first measurement current, the first formation current, the second measurement current and the second formation current by coherent in-phase demodulation; and calculating at least one resistivity parameter by i) comparing the first measurement current to the first formation current and ii) comparing the second measurement current to the second formation current. A system for measuring a resistivity parameter of an earth formation is also provided. | 05-06-2010 |
20100295702 | High Speed Telemetry Full-Duplex Pre-Equalized OFDM Over Wireline for Downhole Communication - A Full-Duplex Pre-equalized OFDM system for high speed telemetry down-hole wire-line communication. The system compensates for the narrow bandwidth, high attenuation of, and noise in a downhole wireline using Trellis Code Modulation and Reed Solomon encoding. | 11-25-2010 |