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| Number | Title | Issue Date |
| 7530265 | Method and apparatus for elemental analysis of a fluid downhole The present invention provides a method and apparatus for performing elemental analysis of a formation fluid downhole. The present invention provides elemental analysis of a formation fluid downhole using breakdown spectroscopy. In one aspect of the invention, a met... | 05/12/2009 |
| 7395704 | Method and apparatus for downhole fluid analysis using molecularly imprinted polymers The present invention provides a downhole method and apparatus using molecularly imprinted polymers to analyze a downhole fluid sample or determine the percentage of oil based mud filtrate contamination in a formation fluid sample. ... | 07/08/2008 |
| 7380598 | Method for detecting fluid leakage from a subterranean formation A method for the detection of a fluid leak from a plugged well extending from a surface of the earth to penetrate a subterranean formation which contains fluid by logging a collection chamber positioned in the plugged well. ... | 06/03/2008 |
| 7347945 | Method and an installation for separating out multiphase effluents The invention relates to a method and to an installation for separating out an effluent made up of a multi-phase fluid mixture. According to the invention, said installation includes gravity separator means whose geometrical separation characteristics can be adjuste... | 03/25/2008 |
| 7328624 | Probe for measuring parameters of a flowing fluid and/or multiphase mixture A probe 10,170 is provided that measures the speed of sound and/or vortical disturbances propagating in a single phase fluid flow and/or multiphase mixture to determine parameters, such as mixture quality, particle size, vapor/mass ratio, liquid/vapor ratio, ... | 02/12/2008 |
| 7318343 | System for detecting gas in a wellbore during drilling A system is provided for detecting the presence of formation gas in a stream of drilling fluid flowing through a wellbore during drilling of the wellbore. The system has at least one sensor chamber connectable to a drill string for drilling the wellbore, each sensor... | 01/15/2008 |
| 7308941 | Apparatus and methods for measurement of solids in a wellbore Apparatus and methods for measuring solids in wellbore that include a bottom hole assembly having a sensor to measuring a characteristic indicative of solids in the wellbore. The measurement may be used to measure solids or solids suspended in fluid flow. The invent... | 12/18/2007 |
| 7289942 | Performance prediction method for hydrocarbon recovery processes The invention relates to a method for predicting the performance of large-scale hydrocarbon-bearing reservoir floods. One embodiment of the invention includes a method for predicting performance of a patterned flooding process in a subterranean hydrocarbon-bearing f... | 10/30/2007 |
| 7257985 | Apparatus and method for real time determination of density and related parameters in manufacturing processes Methods and apparati for measuring entrained gas content. One of the disclosed apparatus embodiments includes a chamber and piping for process fluid, the piping including two different sectors each comprising a density and temperature gauge having a pressure gauge l... | 08/21/2007 |
| 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 |
| 7197924 | Apparatus and method for evaluating subterranean environments A subterranean environment evaluating apparatus and method, which measure, e.g., the geologic distribution coefficient in a subterranean environments using, e.g., a pit formed by boring. The subterranean environment evaluating apparatus comprises a geologic evaluati... | 04/03/2007 |
| 7162918 | 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... | 01/16/2007 |
| 7069776 | Method for measuring particle concentration during injection pumping operations In a well bore operation in which a particulate is added to a fluid stream, a method of determining the concentration of said particulate in said fluid stream comprising the steps of measuring the rate of flow of the fluid stream, determining the rate of particulate... | 07/04/2006 |
| 7059180 | Water cut rate of change analytic method A method of measuring a water effect on an underground non-water well includes the steps of assembling a history of water cut (WC) measurements for the well over an extended period of time, determining a water cut rate of change (R) for the well based upon the histo... | 06/13/2006 |
| 7032662 | Method for determining the extent of recovery of materials injected into oil wells or subsurface formations during oil and gas exploration and production Disclosed is a method of determining the extent of recovery of materials injected into oil wells or subsurface formations. The method includes injection of one or more tracers into an oil well or into a formation. Included in the method are the steps of introducing ... | 04/25/2006 |
| 7027138 | Enhanced sensitivity differential refractometer incorporating a photodetector array An improved differential refractometer incorporating a photodetector array is disclosed. Using a multi-element photo array provides the basis for measurement of differential refractive index values with a heretofore unattainable combination of sensitivity of measure... | 04/11/2006 |
| 7024060 | Method and apparatus for continuous measurement of the refractive index of fluid An apparatus and method are herein disclosed which utilize a ratio based on a varied angle of incidence of light on an optical fiber analysis system. By calculating the ration of light incident on the sample element, variations in the system parameters which can pro... | 04/04/2006 |
| 7017388 | Determination of gas-free densities and relative amounts of gases in liquids in manufacturing processes Improved control of continuous processes that handle liquids. Data generated by this invention is used to control gas contents of liquids within optimum ranges, for instance in paper coating processes and in the manufacture of food products (ketchup), personal care ... | 03/28/2006 |
| 7004020 | Production profile determination and modification system A system and method for profiling and modifying fluid flow through a wellbore. The system comprises a logging system, a downhole unit, and a deployment system. The logging system comprises a logging tool. The downhole unit is operable to house the logging tool. In a... | 02/28/2006 |
| 6915685 | Tool holder for measurement means The invention relates to a tool holder serving to receive measurement means (9, 10, 13) for characterizing a multi-phase fluid coming from a deposit (17) through which at least one well (16) passes, and flowing inside said tool holder. According... | 07/12/2005 |
| 6891606 | Real-time on-line sensing and control of mineral scale deposition from formation fluids The present invention provides a method and system for controlling mineral scale deposition from a formation fluid. The rate at which scaling is occurring is measured in real time using an attenuated total reflectance probe and a photometer. The results are then use... | 05/10/2005 |
| 6886632 | Estimating formation properties in inter-well regions by monitoring saturation and salinity front arrivals A method and system of monitoring the movement of at least one front in an inter-well region is comprised of: providing a first well representing the origination of at least one front (such as a saturation front or a salinity front); providing one or more monitoring... | 05/03/2005 |
| 6840091 | Geophysical method for quantification of dense non-aqueous phase liquids in the subsurface The present invention is a method of calculating non-aqueous phase liquid saturation in a soil sample including the steps of measuring the bulk dielectric constant of the sample, measuring the bulk density of the sample, estimating the bulk porosity of the sample fr... | 01/11/2005 |
| 6823721 | Method and system for mass flow balance accounting A system which receives as inputs various measurements of solids and liquids in a clarification system and, from these measurements, determines the various constituents and their fractional makeup within the system. The measurements may be made manually or mechanica... | 11/30/2004 |
| 6725926 | Method of tracking fluids produced from various zones in subterranean wells Compositions and methods for determining the source of treatment fluids being produced from a production formation having multiple zones by introducing a treatment composition having a tracking material into a zone in the subterranean formation, and detecting the tr... | 04/27/2004 |
| 6659175 | Method for determining the extent of recovery of materials injected into oil wells during oil and gas exploration and production Disclosed is a method of determining the extent of recovery of materials injected into a oil well comprising the steps of: a) preparing a material to be injected into an oil well; b) admixing therewith a chemical tracer compound at a predetermined concent... | 12/09/2003 |
| 6611763 | Method of early predicting paraffin deposition risks during production and transport Method of predicting paraffin deposition risks during hydrocarbon production and/or transport, applicable at an early reservoir characterization and production stage. It comprises forming a database characterizing the hydrocarbons in the formation, includ... | 08/26/2003 |
| 6591673 | Methods for identifying fluid types of underground formations A method of identifying the fluid type of subterranean formations according to the correlation between the variation trend of electrical resistivity with depth downhole in a borehole and the variation trend of porosity with depth downhole in the same bore... | 07/15/2003 |
| 6581685 | Method for determining formation characteristics in a perforated wellbore A method for determining the characteristics of a subterranean formation penetrated by an existing or drilled well is disclosed. The method uses a mathematical model to estimate formation parameters as fluid exits the formation through a hole and into the... | 06/24/2003 |
| 6499344 | Apparatus and method to obtain representative samples of oil well production A well tester adapted to select among members of an oil well family to provide a purged and clean vessel to receive samples of well production that include gas and oil, and by selective use of production pressure and lease water under pressure, allow for ... | 12/31/2002 |
| 6427529 | Instrument for surveying the depth and volume of oil and brine in a static fluid column of an oil well An instrument and method for surveying the static fluid column of a cased oil well and measuring the volume of oil and brine in the fluid column is disclosed. The instrument uses the inherent differences in specific gravity between water, oil and brine to... | 08/06/2002 |
| 6328103 | Methods and apparatus for downhole completion cleanup A method of performing a downhole well completion cleanup is provided. In a described embodiment, completion fluids from a first zone are flowed into a tubular string, and then the fluids are discharged into a second zone. An apparatus usable in the metho... | 12/11/2001 |
| 6321595 | Characterization of organic contaminants and assessment of remediation performance in subsurface formations Characterization of organic contaminants in subsurface formation is performed by methods for detecting the presence of nonaqueous phase liquid in a subsurface formation, and for determining the composition and for determining the volume of nonaqueous phas... | 11/27/2001 |
| 6308787 | Real-time control system and method for controlling an underground boring machine Systems and methods for controlling an underground boring tool involve rotating the boring tool and sensing a parameter of boring tool rotation. The boring tool is also displaced along an underground path and a parameter of boring tool displacement is sen... | 10/30/2001 |
| 6305216 | Method and apparatus for predicting the fluid characteristics in a well hole An improved apparatus and improved method for determining the characteristics of a multi-phase fluid along a well hole having a predefined geometric profile are presented. Various state properties of the fluid, including the temperature, pressure and spec... | 10/23/2001 |
| 6286367 | Method of evaluating the effluent of a hydrocarbon well by means of a multiphase flowmeter, and installation implementing the same A multiphase flowmeter (30) is mounted on the piping via which a multiphase fluid flows out from a hydrocarbon well, so as to measure the flow rates of the various phases of the fluid. A back-pressure valve (34) is placed in the piping downstream from the... | 09/11/2001 |
| 6276190 | Differential total-gas determination while drilling Apparatus and process is provided for establishing values of the quality of gaseous hydrocarbons in gas extracted from mud while drilling. Two rare earth sensors, without a coating, are exposed to the extracted gas. The first sensor is pre-calibrated and ... | 08/21/2001 |
| 6273202 | Swab test for determining relative formation productivity The productivity of a formation is determined by stroking the drill bit up and down (swabbing) in the zone of interest for creating a suction in the wellbore and inducing the flow of hydrocarbons from the formation. The drilling mud 15 is first circulated... | 08/14/2001 |
| 6182505 | Method and apparatus for studying the properties of a multiphase fluid under pressure flowing in a duct, such as a petroleum stream To study the properties of a multiphase fluid under pressure flowing along a duct, such as the petroleum stream produced by an oil well, a fraction of the fluid is taken from a substantially vertical first length of the duct within which the fluid is agit... | 02/06/2001 |
| 6176129 | Method and apparatus for acquiring data in a hydrocarbon well In a hydrocarbon well, a speed measurement is performed at substantially the same level as a determination of the proportions of the phases of the fluid flowing along the well in at least one local region. To this end, local sensors are placed on the hing... | 01/23/2001 |
