摘要:
Environmental sampling apparatuses, systems, and related methods are provided. The environmental sampling apparatus includes a vial defining an inlet having a first diameter, the vial defining an interior chamber having a second diameter larger than the first diameter. The apparatus further includes one or more adsorbent assemblies disposed within the interior chamber, the adsorbent assembly including a first and a second sampling element, each of the first and second sampling elements including a passivated mesh enclosure respectively receiving a first and a second adsorbent material, the first adsorbent material having a lower adsorbency than the second adsorbent material, and the first adsorbent material being disposed more proximate to the inlet than the second adsorbent material. The apparatus further includes a flow path extending through the inlet and along the longitudinal axis and radially inward with respect to each of the first and second adsorbent materials.
摘要:
A method of detecting an analyte includes vaporizing at least a portion of a fluid within a wellbore, passing the vaporized fluid adjacent a chemiresistive sensing element coupled to a drill string within the wellbore and sensing a resistivity of the chemiresistive sensing element. A sensor for detecting an analyte includes an expansion device for vaporizing a portion of a fluid within a wellbore, a chemiresistive sensing element configured to contact the vaporized fluid within the wellbore and a controller configured to pass a current through the chemiresistive sensing element and calculate a resistance of the chemiresistive sensing element in contact with the gaseous portion of the fluid. An earth-boring tool may include a bit body coupled to a drill string and the sensor.
摘要:
Provided herein is a system and method for natural gas liquid sample conditioning including an insulated cabinet having a sample input, a vaporizer, a heated regulator, a gas sample outlet, and a control system for preventing phase separation and or re-liquification of the conditioned sample before entry into an associated analyzer and in a specific embodiment, featuring an automatic shutdown system to prevent sample liquid from further processing and passage to an associated analyzer.
摘要:
A passive sampling apparatus and method for measuring the cumulative mass of a selected gas being transported through a known cross-sectional area, for example, a soil surface, during a chosen period of time, using absorbent material, are described. Two quantities of absorbent material are disposed in a hollow container, such as a pipe section, and spaced apart such that they may be readily separated for analysis. The absorbent material closest to the soil captures the gas leaving the soil. Under reversed flow conditions, for example when the ambient air enters the ground because of fluctuations in atmospheric pressure, the upper absorbent material captures the component of interest entering the apparatus, thereby preventing this gas from entering the lower material and disturbing the measurement. The apparatus can therefore sequester the component of interest without being affected by the direction of gas transport.
摘要:
Spürvorrichtung für Bodenspürungen aus dem Inneren eines Fahrzeugs (4), mit einer mit dem Boden in Kontakt bringbaren Spürsonde (2) und einer Handhabe (3) zur Bewegung der Spürsonde (2) von einer Ruhestellung in eine abgesenkte Bodenspürstellung, wobei die Spürsonde (2) mit der Handhabe (3) derart gekoppelt ist, dass sich bei Betätigung der Handhabe (3) die Spürsonde (2) unter Hebelwirkung in die Bodenspürstellung absenkt, oder wobei die Absenkbewegung der Spürsonde (2) mittels einer Absenkarretierung (12) arretierbar ist, oder wobei mittels der Handhabe (3) die Spürsonde (2) zum Ausrichten um eine im Wesentlichen horizontale Schwenkebene schwenkbar ist, wobei mittels einer Ausrichtarretierung die Ausrichtung arretierbar ist sowie Fahrzeug mit einer Spürvorrichtung, wobei die Spürsonde (2) durch den Boden (28) des Fahrzeuginnenraums geführt ist.
摘要:
This device comprises a means (111) for forming a gaseous flow from the sample and a means (121) for separation of each specific gaseous constituent. It comprises a means (115) for quantifying the relative contents of the two isotopes to be analysed which comprise an optical measurement cell (127). The cell (127) comprises two mirrors (137A, 137B) which delimit a measurement cavity (147). The device comprises a means (161) for introducing an incident optical signal into the measurement cavity (147), a means (161) for generating a plurality of reflections of the signal in separate points (174A, 174B) on each mirror (137A, 137B) during its travel in the cavity, a means (133) for measuring a transmitted optical signal resulting from an interaction between the optical signal and each isotope in the measurement cavity (147), and a means (125) for calculating said relative contents on the basis of these signals.
摘要:
A method and apparatus are provided for maintaining pressure inside a closed chamber equal to the changing outside pressure, detecting leaks in the plumbing (i.e., air handling system) of a trace gas flux measurement system, and estimating the kinetic volume, e.g., of such a system.
摘要:
A system of the provision of information and commands to a device comprising an accessory to receive the device and a bar code reader connected to the accessory wherein the accessory is provided with an emitter and detector in such a configuration that they align with corresponding components in the device to enable communication between the device and the accessory, information is then provided from the barcode reader to the accessory and then transmitted to the device where it initiates any necessary action, the system is particularly useful for the calibration, zeroing and setting of personal gas detectors.
摘要:
Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for detecting seepage of hydrocarbons in subterranean zones. In one aspect, a method includes detecting hydrocarbon seepage at multiple different sampling depths from a surface in a surveyed geographic region, comparing each of the hydrocarbon seepage at the multiple different sampling depths, wherein hydrocarbon seepage at a reference depth is known, and determining hydrocarbon seepage through the surveyed geographic region based on a result of the comparison.