Patent application number | Description | Published |
20120137764 | Detecting Gas Compounds For Downhole Fluid Analysis - A gas separation and detection tool for performing in situ analysis of borehole fluid is described. The tool comprises a sampling chamber for a downhole fluid. The sample chamber comprises a detector cell with an opening. The tool also comprises a gas separation module for taking a gas from the downhole fluid. The gas separation module comprises a membrane located in the opening, a support for holding the membrane, and a sealant applied between the housing and the membrane or support. Moreover, the tool comprises a gas detector for sensing the gas. | 06-07-2012 |
20130071934 | METHOD AND SYSTEM FOR MEASUREMENT OF RESERVOIR FLUID PROPERTIES - A method and system that characterizes hydrogen sulfide in petroleum fluid employs a tool that includes a fluid analyzer for performing fluid analysis (including optical density (OD) for measuring carbon dioxide concentration) of a live oil sample, and a storage chamber for an analytical reagent fluidly coupled to a measurement chamber. An emulsion from fluid of the sample and the reagent is produced into the measurement chamber. The reagent changes color due to pH changes arising from chemical reactions between components of the sample and the reagent in the measurement chamber. The tool includes an optical sensor system that measures OD of a water phase of the emulsion at one or more determined wavelengths. The pH of the water phase is derived from such OD measurements. The pH of the water phase and the carbon dioxide concentration in the sample is used to calculate hydrogen sulfide concentration in the sample. | 03-21-2013 |
20130110401 | CALIBRATION AND CONSISTENCY CHECK OF VARIABLEW VOLUME SYSTEMS | 05-02-2013 |
20130239664 | Fluid Density From Downhole Optical Measurements - A system and method for determining at least one fluid characteristic of a downhole fluid sample using a downhole tool are provided. In one example, the method includes performing a calibration process that correlates optical and density sensor measurements of a fluid sample in a downhole tool at a plurality of pressures. The calibration process is performed while the fluid sample is not being agitated. At least one unknown value of a density calculation is determined based on the correlated optical sensor measurements and density sensor measurements. A second optical sensor measurement of the fluid sample is obtained while the fluid sample is being agitated. A density of the fluid sample is calculated based on the second optical sensor measurement and the at least one unknown value. | 09-19-2013 |
20140096955 | DETERMINING FLUID COMPOSITION DOWNHOLE FROM OPTICAL SPECTRA - Obtaining in-situ optical spectral data associated with a formation fluid flowing through a downhole formation fluid sampling apparatus, and predicting a parameter of the formation fluid flowing through the downhole formation fluid sampling apparatus based on projection of the obtained spectral data onto a matrix that corresponds to a predominant fluid type of the formation fluid. | 04-10-2014 |
20140150545 | Scattering Detection from Downhole Optical Spectra - Obtaining in-situ, at a first time, first optical spectral data associated with a formation fluid flowing through a downhole formation fluid sampling apparatus, and then obtaining in-situ, at a second time after the first time, second optical spectral data associated with the formation fluid flowing through the downhole formation fluid sampling apparatus. A wavelength-independent scattering intensity within the formation fluid flowing through the downhole formation fluid sampling apparatus is then determined based on the first and second optical spectral data, and a wavelength-dependent scattering intensity within the formation fluid flowing through the downhole formation fluid sampling apparatus is determined based on the first and second optical spectral data. | 06-05-2014 |
20140180591 | Multi-Sensor Contamination Monitoring - A downhole sampling tool is operated to obtain formation fluid from a subterranean formation, which then flows through a flowline of the downhole sampling tool. Real-time density and optical density sensors of the downhole sampling tool are co-located proximate the flowline. Contamination of the formation fluid in the flowline is then determined based, at least in part, on the real-time density and optical density measurements obtained utilizing the co-located sensors. | 06-26-2014 |
20140293282 | Optical Spectrometer And Downhole Spectrometry Method - An optical spectrometer includes a near black body light source, a reference detector in a first optical path and a single measurement detector in a second optical path. A sample cell including a fluid flow line may be positioned in the second optical path upstream of the measurement detector. Optical energy ma be emitted at a plurality of filament temperatures and first and second sets of optical intensities measured at the reference and measurement detectors. The first and second sets of optical intensities may be processed to compute a substantially continuous transmittance spectrum of a fluid sample in the fluid flow line by inverting the acquired optical intensity measurements. | 10-02-2014 |
20140360257 | System And Method For Estimating Oil Formation Volume Factor Downhole - A system includes a downhole formation fluid sampling tool and a processor. An optical spectrometer of the downhole formation fluid sampling tool is able to measure an optical characteristic of a formation fluid flowing through the downhole formation fluid sampling tool over a plurality of wavelengths. The optical spectrometer generates optical spectra data indicative of this optical characteristic. The processor is designed to receive the optical spectra data generated by the optical spectrometer and to estimate a formation volume factor of the formation fluid based on the optical spectra data. | 12-11-2014 |
20140360259 | System And Method For Quantifying Uncertainty Of Predicted Petroleum Fluid Properties - A system includes a downhole formation fluid sampling tool. The system also includes an optical spectrometer of the downhole formation fluid sampling tool and a processor. The optical spectrometer is able to measure an optical characteristic of a formation fluid flowing through the downhole formation fluid sampling tool over a plurality of wavelengths. The optical spectrometer is designed to generate optical spectra data indicative of the optical characteristic. The processor is able to receive the optical spectra data generated by the optical spectrometer, to predict a parameter corresponding to one component of multiple components of the formation fluid based on the optical spectra data, and to calculate an uncertainty in the predicted parameter based on the optical spectra data. | 12-11-2014 |
20150013968 | System And Method For Operating A Pump In A Downhole Tool - A method includes pumping fluid from outside of a downhole tool through a flowline of the downhole tool with a pump and taking first measurements, using at least one sensor, within the flowline during a first stage of pumping the fluid. The method further includes estimating a saturation pressure of the fluid, via a processor, based on the first measurements and a saturation pressure model generated based on second measurements taken using the at least one sensor during a second stage of pumping the fluid, and operating the pump to maintain a fluid pressure in the flowline greater than the estimated saturation pressure. | 01-15-2015 |
Patent application number | Description | Published |
20110285429 | Microcontroller and method of controlling the same - A microcontroller includes a data input unit that receives input data and outputs a start request signal according to the input data upon receiving the input data; an oscillator that starts according to the start request signal, to generate a clock signal; a clock signal supply control unit that outputs the start request signal supplied from the data input unit to the oscillator, and supplies the clock signal supplied from the oscillator generated after the start as a first clock signal and a second clock signal that are operation clock signals of the data input unit; and a CPU that operates the second clock signal as an operation clock, and performs processing according to the input data when the second clock signal is operated. | 11-24-2011 |
20110313700 | VOLTAGE DETECTION SYSTEM AND CONTROLLING METHOD OF THE SAME - There is a need to solve a possible system malfunction when a power supply voltage decreases steeply. To solve this problem, a control method is provided for a voltage detection system having an interrupt mode and a reset mode. First and second detection levels are configured. When a power supply voltage is higher than the first detection level, a latch circuit is placed in a first state to enable the interrupt mode. When the power supply voltage becomes lower than or equal to the first detection level, an interrupt signal is generated to change the latch circuit from the first state to a second state and enable the reset mode. A system reset is issued when the power supply voltage becomes lower than or equal to the second detection level in the reset mode. | 12-22-2011 |
20120025805 | VOLTAGE DETECTION CIRCUIT AND METHOD FOR CONTROLLING THE SAME - A voltage detection circuit including a voltage selection circuit that outputs a voltage commensurate with a power supply voltage as a first voltage; a detection voltage selection circuit that selects either an external input voltage inputted from an external terminal or the first voltage according to a first control signal, and outputs it as a comparison voltage; a reference voltage generation circuit that generates a reference voltage; a comparator that compares the reference voltage and the comparison voltage, and outputs the comparison result as a detection signal; a control circuit that generates the first control signal so that the detection voltage selection circuit may output either the first voltage or the external input voltage as the comparison voltage by time division, and when a variation of the first voltage is detected, generates the first control signal so that the detection object selection circuit may output the first voltage as the comparison voltage. | 02-02-2012 |