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"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7889596 | Method and a system for determining the position of a drill bit A method and a system for determining the position of a drill bit are presented. The method comprises determining positions of seismic wave detectors, recording seismic waves generated at the drill bit, identifying events at the drill bit, determining a plurality of... | 02/15/2011 |
| 7787327 | Cement bond analysis A method and apparatus for evaluating a bond between a formation and a bonding material. The method includes emitting a shear wave into the tubular, recording the response of the shear wave, and evaluating the response to obtain bond information. The bond informatio... | 08/31/2010 |
| 7764571 | Vector 3-component 3-dimensional Kirchhoff prestack migration An apparatus and a method for migration of three components, 3-Dimensions seismic (3-C, 3-D) data acquired by down-hole receivers and surface seismic sources. This method utilizes full 3 components reflection wave field. It uses a dynamic, vector energy mapping meth... | 07/27/2010 |
| 7675813 | Methods and systems for detecting arrivals of interest Methods and systems for taking measurements related to subterranean formations. The methods and systems provide robust, reliable first arrival data for component signals of interest, which may be used to estimate formation slowness, characterize formation slowness z... | 03/09/2010 |
| 7558153 | Radial profiling of slowness: methods and apparatus for near-wellbore alteration estimation Methods and apparatus facilitating radial profiling of acoustic slowness of a formation traversed by a borehole are disclosed. According to some aspects of the invention, a radial slowness profile is imaged, including an image of altered region slowness. ... | 07/07/2009 |
| 7542373 | Vector 3-component 3-dimensional kirchhoff prestack migration An apparatus and a method for migration of three components, 3-Dimensions seismic (3-C, 3-D) data acquired by down-hole receivers and surface seismic sources. This method utilizes full 3 components reflection wave field. It uses a dynamic, vector energy mapping meth... | 06/02/2009 |
| 7450469 | Water velocity corrections Various technologies for a method for processing seismic data. In one implementation, the method includes cross-correlating seismic traces having midpoint locations, offsets and azimuths within a predetermined range but from different sequences; and selecting a peak... | 11/11/2008 |
| 7423930 | Methods and systems for detecting arrivals of interest Methods and systems for taking measurements related to subterranean formations. The methods and systems provide robust, reliable first arrival data for component signals of interest, which may be used to estimate formation slowness, characterize formation slowness z... | 09/09/2008 |
| 7405997 | Method of accounting for wavelet stretch in seismic data A computer-implemented method of accounting for angle-dependent wavelet stretch in seismic data based on a novel relationship between wavelet stretch and the cosine of a reflection angle of an acoustic ray. Conventional seismic data having at least one wavelet, such... | 07/29/2008 |
| 7359550 | Incremental singular value decomposition of incomplete data A method models data values acquired by measuring a natural phenomena. Samples are acquired of the natural phenomena, each sample is arranged as a vector c of the data values. Some of the data values may be missing. The vectors c are decomposed into five matrices, r... | 04/15/2008 |
| 7359284 | Method for processing borehole seismic data Seismic data recorded by subsurface seismic sensors placed in a borehole, such as an oil or gas well, are transformed via a process of upward wavefield propagation to pseudo-receivers at the surface of the earth. The seismic data thus transformed can be processed as... | 04/15/2008 |
| 7350568 | Logging a well A method for logging a well. Includes receiving energy with at least one array of elements coupled to a drill bit, wherein the at least one array of elements functions as an electronic array. An apparatus for logging a well includes a drill bit and at least one arra... | 04/01/2008 |
| 7334470 | Digital interface and receiver for time-of-flight level measurement and pulse-echo ranging systems An digital interface and receiver for time-of-flight level measurement and pulse-echo ranging systems. The level measurement device comprises a controller, a transducer, a transmitter stage, an interface, and a digital receive signal processing module. The transmitt... | 02/26/2008 |
| 7324635 | Branch calling and caller ID based call routing telephone features A caller ID based call routing feature is described for blocked and non-blocked caller ID's. A processing system in the public switched telephone network (PSTN) receives first identifying information for identify the source of a telephone call and associates additio... | 01/29/2008 |
| 7317989 | Method and apparatus for chemometric estimations of fluid density, viscosity, dielectric constant, and resistivity from mechanical resonator data The present invention provides a chemometric equation to estimate fluid density, viscosity, dielectric constant and resistivity for a formation fluid sample downhole. The chemometric estimates can be used directly as estimated values for fluid density, viscosity, di... | 01/08/2008 |
| 7310580 | Method for borehole measurement of formation properties The present invention is a method of estimating formation properties by analyzing acoustic waves that are emitted from and received by a bottom hole assembly. A bottom hole assembly may be deployed in a borehole to estimate formation properties. From the bottom hole... | 12/18/2007 |
| 7283910 | Incremental depth measurement for real-time calculation of dip and azimuth The present invention provides a method and apparatus for logging an earth formation and acquiring subsurface information wherein a logging tool is conveyed in borehole to obtain parameters of interest. The parameters of interest obtained may be density, acoustic, m... | 10/16/2007 |
| 7260477 | Estimation of borehole geometry parameters and lateral tool displacements A method for determining a borehole geometry parameter vector and/or lateral tool displacement vectors in a borehole is provided. The method includes acquiring at least one set of standoff measurements at a corresponding time. The method also includes processing a s... | 08/21/2007 |
| 7200492 | Apparent dip angle calculation and image compression based on region of interest The present invention provides a method and apparatus for logging an earth formation and acquiring subsurface information wherein a logging tool is conveyed in borehole to obtain parameters of interest. The parameters of interest obtained may be density, acoustic, m... | 04/03/2007 |
| 7196634 | Systems for predicting earthquakes and methods of employing such systems A method of predicting earthquakes includes the step of positioning a first transducer array adjacent to a seismically active region and below the water table, i.e., within the zone of saturation. The first transducer array includes a first plurality of seismometers... | 03/27/2007 |
| 7143826 | Method for determining sand free production rate and simultaneously completing a borehole The current invention provides methods for determining the sand production rate from unconsolidated and poorly consolidated subterranean formations under varying drawdown pressures. The current invention also allows for immediate production of fluid from the subterr... | 12/05/2006 |
| 7136510 | Borehole imaging A method of detecting significant events intersecting a borehole from an image of the borehole wall having: (a) converting the image into a three-dimensional orientation space; (b) selecting a parameter relation that represents the intersection of an event (3,5 | 11/14/2006 |
| 7099810 | Acoustic logging tool having quadrupole source An acoustic tool that provides a reduced tool mode and enhanced accuracy for estimating shear wave propagation slowness in slow formations is disclosed. In one embodiment, the acoustic tool comprises: an acoustic source, an array of acoustic receivers, and an intern... | 08/29/2006 |
| 7083006 | Non-rotating sensor assembly for measurement-while-drilling applications An MWD method and apparatus for determining parameters of interest in a formation has a sensor assembly mounted on a slidable sleeve slidably coupled to a longitudinal member, such as a section of drill pipe. When the sensor assembly is held in a non-rotating positi... | 08/01/2006 |
| 7079449 | Methods and systems for low frequency seismic and infrasound detection of geo-pressure transition zones Methods for determining the existence and characteristics of a gradational pressurized zone within a subterranean formation are disclosed. One embodiment involves employing an attenuation relationship between a seismic response signal and increasing wavelet waveleng... | 07/18/2006 |
| 7066019 | Cavity stability prediction method for wellbores A method of predicting the failure of a rock formation surrounding a subterranean cavity, including a measuring set of parameters relating to pressure conditions and stresses in the rock formation surrounding the cavity; using the set of parameters to determine a ro... | 06/27/2006 |
| 7046581 | Well-to-well tomography A method of obtaining a spatial model of a property of part of a subsurface formation located between underground seismic receivers in which at least two sets of pairs of seismic receivers are utilized and one pair of receivers is used to record a signal from a seim... | 05/16/2006 |
| 6957146 | System for utilizing seismic data to estimate subsurface lithology A method of geophysical exploration of a subsurface region of interest which utilizes an unsupervised learning network to organize seismic data representing a subsurface region of interest. A portion of the organized seismic data is correlated with lithological data... | 10/18/2005 |
| 6941819 | Apparatus and method for determining the dynamic mechanical properties of a cement sample An apparatus for determining dynamic mechanical properties of a cement sample. The apparatus includes an isolator located within a cavity defined by a body. The isolator has an attached end that engages the body proximate a narrow end of the cavity. A space between ... | 09/13/2005 |
| 6938470 | Method and apparatus for downhole fluid characterization using flexural mechanical resonators The present invention provides a downhole method and apparatus using a flexural mechanical resonator, for example, a tuning fork to provide real-time direct measurements and estimates of the viscosity, density and dielectric constant of formation fluid or filtrate i... | 09/06/2005 |
| 6920082 | Method and apparatus for determining earth formation shear-wave transverse isotropy from borehole stoneley-wave measurements The present invention is a method of determining formation horizontal shear wave velocity, formation transverse isotropy and an effective logging tool modulus. The method comprises determining an effective logging tool modulus by modeling the logging tool as a fluid... | 07/19/2005 |
| 6907348 | Synthetic acoustic array acquisition and processing The present invention provides a method of determining a property of an earth formation using an acoustic logging tool on a bottomhole assembly (BHA) in a borehole in the earth formation. At least one transmitter is used in the acoustic logging tool for generating a... | 06/14/2005 |
| 6891777 | Subsurface borehole evaluation and downhole tool position determination methods Methods for processing ultrasonic signal data to evaluate subsurface properties and tool orientation. Acoustic signals are transmitted into a plurality of azimuthal borehole positions. Formation echo signal transit time distributions are then determined in a plurali... | 05/10/2005 |
| 6870482 | Systems for predicting earthquakes and methods of employing such systems A method of predicting earthquakes includes the step of positioning a first transducer array adjacent to a seismically active region and at least about 3 meters below the surface of the crust of the Earth. The first transducer array includes a first plurality of sei... | 03/22/2005 |
| 6816435 | Method for estimating the position of a drill The present invention relates to a method for estimating the position and trajectory of a drill during drilling of boreholes in rock. The method comprising the steps of determining the starting position of the drill bit and recording the received transient seismic w... | 11/09/2004 |
| 6788619 | Concentrating seismic energy in a selected target point in an underground formation Providing a set of seismic sources in a focusing array to enable concentrating seismic energy in a selected target point (k) in an underground formation, by performing a standard seismic survey of the underground formation using a set of impulsive seismic sources an... | 09/07/2004 |
| 6747915 | Seismic imaging a subsurface formation A method of seismic imaging a subsurface formation using an array of seismic sources and an array of seismic receivers located subsurface, wherein there is a complex transmission medium between the two sets by creating a virtual source at a selected receiver within ... | 06/08/2004 |
| 6748329 | Acoustic signal processing method using array coherency A system and method is provided for characterizing earth formations. In one embodiment, the method includes passing a logging tool through a borehole and repeatedly: (a) triggering an acoustic wave generator; (b) recording acoustic waveforms received by receivers in... | 06/08/2004 |
| 6618322 | Method and apparatus for measuring acoustic mud velocity and acoustic caliper A method and apparatus for determining acoustic mud velocity and bore hole caliper in a downhole environment. A highly accurate acoustic signal is adjusted for mud velocity as continuously measured. The borehole standoff is utilized to compensated data co... | 09/09/2003 |
| 6510389 | Acoustic detection of stress-induced mechanical damage in a borehole wall A method provides for locating and measuring mechanical damage in rock surrounding a borehole by detecting one or both of reductions in ultrasonic compressional wave velocity in the rock as a function of azimuth, and by detecting focused acoustic energy i... | 01/21/2003 |
