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| Number | Title | Issue Date |
| 7586087 | Methods and apparatus to characterize stock-tank oil during fluid composition analysis Methods and apparatus to characterize stock-tank oil during fluid composition analysis are disclosed. A disclosed example method to characterize a fluid associated with an underground geological formation comprises obtaining a sample of the fluid associated with the... | 09/08/2009 |
| 7439494 | Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole Data acquired using a pulsed nuclear source are susceptible to two sources of error. One error is due to large statistical noise towards the end of an acquisition window. Another source of error is the contamination of the early portion of the data by borehole and o... | 10/21/2008 |
| 7352465 | Sample conditioning and environmental control techniques for gas sensor The present invention is a system and method of conditioning the sample and surrounding environment of an exhaled breath sensor. It includes (i) using a particular molecular sieve for a triple purpose: (a) maintaining the sensor at a constant relative humidity durin... | 04/01/2008 |
| 7337660 | Method and system for reservoir characterization in connection with drilling operations A method for analyzing reservoir fluids in connection with a drilling operation includes determining composition and isotopes of injection fluids injected into a wellbore during a drilling operation and production fluids recovered from the wellbore during the drilli... | 03/04/2008 |
| 7325971 | Method and apparatus for locating hydrocarbon deposits A method and apparatus for locating hydrocarbon deposits includes temperature 16 sensor for measuring earth surface temperature at each of a plurality of locations, and a solar absorption sensor 14 for measuring the absorption coefficient of the earth'... | 02/05/2008 |
| 7317185 | Tamper resistant radon detector Embodiments of the present invention provide for a tamper resistant radon detector monitoring system. Other embodiments may be described and claimed. ... | 01/08/2008 |
| 7312439 | Radon progeny monitor A new type of radon progeny monitor called an electret radon progeny integrating sampling unit (E-RPISU) using an electret ion chamber to measure radon progeny concentration. A conventional 1 LPM particulate air sampling system is used to collect the radon progeny o... | 12/25/2007 |
| 7305895 | Bernoulli mushroom inlet housing for efficient air sampling A collection apparatus is provided for receiving a portion of a medium that flows around the apparatus and directing the portion into a collector. The apparatus includes an axisymmetric streamline receiver and a support member. The streamline receiver includes a cha... | 12/11/2007 |
| 7286638 | Methods and systems for determining the average atomic number and mass of materials Disclosed herein are methods and systems of scanning a target for potential threats using the energy spectra of photons scattered from the target to determine the spatial distributions of average atomic number and/or mass in the target. An exemplary method comprises... | 10/23/2007 |
| 7273832 | Alkali metal tungstate compositions and uses thereof Fluids, such as completion fluids, containing at least one alkali metal tungstate and optionally at least one chelating agent are described. Methods of removing a filter cake from a well bore surface, which may include one or more alkaline earth metal sulfates, is a... | 09/25/2007 |
| 7265353 | Data acquisition, control, and spectral analysis software for multi-channel analyzers A system for detecting and identifying low-level (weak) radioactive sources moving past stationary detectors. The system, which can detect low-level sources moving at speeds of 30 m/s (about 70 mph), uses the differences between background counts and gamma counts fr... | 09/04/2007 |
| 7257188 | Dual energy radiation scanning of contents of an object In one embodiment, a method of examining contents of an object is disclosed comprising scanning an object at first and second radiation energies, detecting radiation at the first and second energies, and calculating a function of the radiation detected at the first ... | 08/14/2007 |
| 7251565 | Determining fluid composition from fluid properties A method for determining the composition of a fluid by using measured properties of the fluid. One embodiment of the method of the current invention generally comprises: selecting a fluid property that has a response to fluid composition that is linear, or can be ap... | 07/31/2007 |
| 7246940 | Method and apparatus for managing the temperature of thermal components A temperature management system for managing the temperature of a discrete, thermal component. The temperature management system comprises a heat exchanger thermally coupled with the thermal component. The system also comprises a fluid transfer device that circulate... | 07/24/2007 |
| 7231819 | Chemical sensor for wellbore applications There is described an analyzing device having two separation units to separate molecular species to detect molecular species in wellbore fluids with both separation units operating under forced flow conditions to provide for an active separation of subterranean well... | 06/19/2007 |
| 7219541 | Method and apparatus for downhole fluid analysis for reservoir fluid characterization A formation fluid sample is exposed to a rigidly-supported semi-permeable membrane such as silicone rubber to permit diffusion of gases and vapors from the formation fluid into a vacuum chamber, while at the same time, blocking the passage of any liquids. The membra... | 05/22/2007 |
| 7216533 | Methods for using a formation tester A method of testing a downhole formation using a formation tester on a drill string. The formation tester is disposed downhole on a drill string and a formation test is performed by forming a seal between a formation probe assembly and the formation. A drawdown pist... | 05/15/2007 |
| 7214933 | Method and apparatus for a downhole fluorescence spectrometer The invention comprises an apparatus and method for simple fluorescence spectrometry in a down hole environment. The apparatus and method utilization of two UV light bulbs and an optically clear UV coupler and a fluid containment system. The optically clear UV coupl... | 05/08/2007 |
| 7210343 | Method and apparatus for obtaining a micro sample downhole The present invention provides a downhole sample tank and a plurality of micro sample chambers. The micro sample chambers can have at least one window for introduction of visible, near-infrared (NIR), mid-infrared (MIR) and other electromagnetic energy into the tank... | 05/01/2007 |
| 7210342 | Method and apparatus for determining gas content of subsurface fluids for oil and gas exploration A process to analyze fluid entrained in well boreholes. The process includes gathering trap gas samples from return of drilling mud at multiple depths. The process also includes the steps of subjecting the samples to mass spectrometry in order to determine mass to c... | 05/01/2007 |
| 7201221 | Wellbores utilizing fiber optic-based sensors and operating devices This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for ... | 04/10/2007 |
| 7200200 | X-ray fluorescence measuring system and methods for trace elements An X-ray fluorescence measuring system and related measuring methods are disclosed, the system using X-ray energy at a level of less than 80 KeV may be directed toward a material, such as coal. The energy fluoresced may be detected (10) and used to measure th... | 04/03/2007 |
| 7197949 | Meso sniffer: a device and method for active gas sampling using alternating flow A sampling system for detecting an analyte, comprising a diaphragm pump, a buffer chamber, a sensor head and intake port. The pump includes a chamber for receiving fluids via first and second ports. A buffer chamber is located at the second port for holding a quanti... | 04/03/2007 |
| 7196786 | Method and apparatus for a tunable diode laser spectrometer for analysis of hydrocarbon samples The present invention provides an down hole apparatus and method for ultrahigh resolution spectroscopy using a tunable diode laser (TDL) for analyzing a formation fluid sample downhole or at the surface to determine formation fluid parameters. In addition to absorpt... | 03/27/2007 |
| 7186989 | Low thermal mass fluorometer The present invention provides core technologies necessary for a portable, low cost, thermal-regulating LED-based handheld fluorometer. The regulated fluorometer is based on a low thermal mass infrared heater, and an orthogonal geometry LED based filter fluorometer.... | 03/06/2007 |
| 7173242 | Method for determining whether a rock is capable of functioning as an oil reservoir A method is defined for determining whether a rock is capable of functioning as an oil reservoir has had or presently contains oil. The method includes the steps of: -cleaning a sample of the rock in a manner such that at least some of any adsorbed oil on the rock w... | 02/06/2007 |
| 7173239 | Method and apparatus for downhole quantification of methane using near infrared spectroscopy The present invention describes a unique method and apparatus for applying near-infrared spectroscopy to estimate weight percent of methane in crude oil from which one can then infer gas-oil ratio (GOR) of crude oils downhole in real time while collecting a fluid sa... | 02/06/2007 |
| 7124030 | Mud gas isotope logging interpretive method in oil and gas drilling operations A method of interpreting mud gas samples in a drilling operation of a target area. The method starts with obtaining a plurality of mud gas samples at a plurality of incremental depths of the target area. The plurality of mud gas samples are analyzed to find various ... | 10/17/2006 |
| 7095012 | Methods and apparatus for determining chemical composition of reservoir fluids Methods of analyzing formation fluids in an oilfield environment are near-infrared absorption spectroscopy. Indications of near-infrared absorptions are analyzed to determine the concentration of compounds in a formation fluid sample. ... | 08/22/2006 |
| 7081615 | Methods and apparatus for the downhole characterization of formation fluids Methods and apparatus for investigating a hydrocarbon bearing geological formation traversed by a borehole are disclosed. A borehole tool is used to acquire a sample of fluid in the formation. Compositional analysis of the fluid sample is conducted to provide a dete... | 07/25/2006 |
| 7082185 | Portable imaging system method and apparatus An operator shielded X-ray imaging system has sufficiently low mass (less than 300 kg) and is compact enough to enable portability by reducing operator shielding requirements to a minimum shielded volume. The resultant shielded volume may require a relatively small ... | 07/25/2006 |
| 7073402 | Air sampler with parallel impactors An air sampler is designed for a predetermined flow rate. The air flow is admitted to at least two impactors operating in parallel. Preferably the inlet nozzles and the outlet orifices of each impactor are sized to achieve predetermined cut-off sizes of particles; p... | 07/11/2006 |
| 7075063 | Determining phase transition pressure of downhole retrograde condensate The invention provides a method for determining phase transition pressure of downhole retrograde condensate. An OBM-contamination value is produced from a time-series of fluorescence values produced by measuring fluorescence emitted from a single-phase flow of OBM-c... | 07/11/2006 |
| 7075062 | Apparatus and methods for downhole determination of characteristics of formation fluids An oil sample is subjected to nuclear electromagnetic irradiation downhole, and the electron and/or mass density of the oil sample is determined by measuring the attenuation of the irradiation and relating the attenuation to the electron density. If the irradiation ... | 07/11/2006 |
| 7067811 | NIR spectroscopy method for analyzing chemical process components A method is described for providing rapid on-line analyses of chemical compositions such as chemical process streams, utilizing near-infrared (NIR) spectroscopy in combination with chemometrics. In the method, for each type of analysis to be conducted, a database is... | 06/27/2006 |
| 7050533 | Method and device for determining the type of fluid in a fluid mass in an object A method and a device are proposed for determining the type of fluid in a fluid mass in an object. X-ray attenuation data is supplied from one or a plurality of X-ray recordings of an object area including the fluid mass in the object, which were acquired with at le... | 05/23/2006 |
| 7040390 | Wellbores utilizing fiber optic-based sensors and operating devices This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for ... | 05/09/2006 |
| 7028773 | Assessing downhole WBM-contaminated connate water Water-based mud filtrate concentration in a downhole fluid sample drawn from the borehole of an oil well is assessed. To measure water-based mud filtrate concentration, a water-based mud having a water-soluble fluorescent dye tracer is pumped into the borehole; samp... | 04/18/2006 |
| 7002142 | Determining dew precipitation and onset pressure in oilfield retrograde condensate A method and apparatus detects dew precipitation and determines dew precipitation onset pressure in a sample of formation fluid located downhole in an oilfield reservoir. In a preferred embodiment, the method includes (a) isolating a sample of formation fluid downho... | 02/21/2006 |
| 6967322 | Method and apparatus for performing rapid isotopic analysis via laser spectroscopy Method and apparatus for providing real-time data indicative of the isotopic composition of formation fluids during drilling. The method includes the steps of: (a) providing a reference fluid having a known isotopic composition in a reference cell; (b) capturing a s... | 11/22/2005 |
