Drack

Earle Drack, Spring City, PA US

Patent application number	Description	Published
20090072825	SYSTEMS AND METHODS FOR DEEP-LOOKING NMR LOGGING - An NMR logging tool for conducting NMR measurements in a plurality of sensitive volumes ranging up to a meter from the tool. The tool comprises a magnetic assembly using one or more permanent magnets and at least one pole piece for extending a magnet pole and shaping the magnetic field to simulate a magnetic monopole in a sensitive volume within the formation. Different embodiments of a segmented antenna enable directional NMR logging. The tool embodiments and methods of their use are suitable for wireline or LWD logging, and can be used for directional drilling.	03-19-2009

Patent application number	Description	Published
20100295565	AUTOMATED PHASE SEPARATION AND FUEL QUALITY SENSOR - A fluid characterization sensor comprising a plurality of sensor segments is disclosed. Each segment comprises two electrodes, spaced apart so the fluid in the corresponding interval of depth for that segment is positioned between them. Complex current or impedance is measured by exciting one electrode with an AC signal, and measuring the amplitude and phase of the current in the other electrode. After automatically measuring and accounting for pre-determined gain, offset, temperature, and other parasitic influences on the raw sensor signal, the complex electrical impedance of the fluid between the electrodes is calculated from the measured phase/amplitude and/or real/imaginary components of the received electrical current signal and/or the variation of the measured response with variation in excitation frequency. Comparison of measured results with results taken using known fluids identifies fluid properties. Alternatively, measured results are compared to predicted results using forward models describing expected results for different fluids or contaminants.	11-25-2010

Patent application number	Description	Published
20110268557	SYSTEM AND METHOD FOR ATTENUATING THE NOISE OF AIRFOILS - A system and method for reducing the noise of an airfoil is provided. The airfoil includes a main portion including a leading edge and a trailing edge. The airfoil further comprises a noise attenuator coupled to the main portion and disposed proximate to at least a portion of the trailing edge. The noise attenuator has a chord length in the range of about 0.5 to about 5 times a trailing edge thickness and is fixed relative to the trailing edge. The airfoil can be a rotating blade deployed on a wind turbine. The airfoil can also be deployed on an aircraft as a fixed wing.	11-03-2011