| Patent application number | Description | Published |
|---|
| 20090143992 | METHODS AND APPARATUS TO DETERMINE A CONCENTRATION OF NITROGEN IN A DOWNHOLE FLUID - Methods and apparatus to determine a concentration of nitrogen in a downhole fluid are described. An example apparatus to determine a concentration of nitrogen in a downhole fluid includes a fluid measurement unit to measure a first fluid composition and a density of at least a hydrocarbon and carbon dioxide in a sample of the downhole fluid. Additionally, the example apparatus includes one or more sensors to measure at least a pressure and a temperature of the sample. Further, the example apparatus includes a processing unit to determine a first theoretical density based on at least the first fluid composition, the temperature, and the pressure the sample. Further still, the example apparatus includes an analyzer to determine a first difference between the density of at least the hydrocarbon and the carbon dioxide in the sample and the first theoretical density. The first difference is associated with a concentration of nitrogen in the sample. | 06-04-2009 |
| 20100050761 | DETECTING GAS COMPOUNDS FOR DOWNHOLE FLUID ANALYSIS - A gas separation and detection tool for performing in situ analysis of borehole fluid is described. A separation system such as a membrane is employed to separate one or more target gasses from the borehole fluid. The separated gas may be detected by reaction with another material or spectroscopy. When spectroscopy is employed, a test chamber defined by a housing is used to hold the gas undergoing test. Various techniques may be employed to protect the gas separation system from damage due to pressure differential. For example, a separation membrane may be integrated with layers that provide strength and rigidity. The integrated membrane separation may include one or more of a water impermeable layer, gas selective layer, inorganic base layer and metal support layer. The gas selective layer itself can also function as a water impermeable layer. The metal support layer enhances resistance to differential pressure. Alternatively, the chamber may be filled with a liquid or solid material. | 03-04-2010 |
| 20100124313 | METHODS AND APPARATUS TO PERFORM DOWNHOLE X-RAY FLUORESCENCE - Example methods and apparatus to perform downhole x-ray fluorescence to detect sulfur in formation fluids are disclosed. A disclosed example downhole x-ray fluorescence apparatus comprises a flowline comprising a flowline wall, an x-ray source, a boron carbide crystal window in the flowline wall to allow x-rays emitted by the x-ray source to pass into a formation fluid in the flowline, and a detector to measure a value representative of a fluorescence of the formation fluid in response to the emitted x-rays. | 05-20-2010 |
| 20100206063 | METHODS AND APPARATUS TO USE MULTIPLE SENSORS TO MEASURE DOWNHOLE FLUID PROPERTIES - Methods and apparatus to use multiple sensors to measure downhole fluid properties are described. An example method of measuring a property of a downhole fluid involves obtaining a plurality of measurements for each of a plurality of sensors. Each of the measurements corresponds to a same property of the downhole fluid, and each of the sensors is differently configured to measure the property. Additionally, the example method involves obtaining a plurality of weighting values, each of which corresponds to one of the sensors. The example method also involves applying the weighting values to the respective measurements obtained by each of the corresponding sensors to generate a weight-corrected measurement for each of the sensors. Further still, the example method involves generating a value representative of a measurement of the property of the downhole fluid based on the weight-corrected measurements and outputting the value representative of the measurement of the property. | 08-19-2010 |
| 20110030455 | VIBRATING WIRE VISCOMETERS - Vibrating wire viscometers are disclosed. An example vibrating wire viscometer includes first and second electrically conductive tubes, where the first tube is at least partially inserted into the second tube, and where the first and second tubes are coupled via an electrically insulating bonding agent. The example viscometer further includes first and second electrically conductive pins inserted into respective ones of the first and second tubes, and an electrically conductive wire fastened to the first and second pins to vibrate in a downhole fluid to determine a viscosity of the downhole fluid. | 02-10-2011 |
| 20110054796 | METHOD FOR CALCULATING THE RATIO OF RELATIVE PERMEABILITIES OF FORMATION FLUIDS AND WETTABILITY OF A FORMATION DOWNHOLE, AND A FORMATION TESTING TOOL TO IMPLEMENT THE SAME - A method and a tool that implements a method which includes measuring the viscosity and flow rates of formation fluids and obtaining the ratio of relative permeabilities of the formation fluids and wettability of the formation using the same. | 03-03-2011 |
