Natural hydrogen gas sampling system and method
AssigneeExpro North Sea Limited
InventorsDora Mercedes Piedrahita Macea, Omotayo Fagade, Elkin Antonio Colorado Ramirez, Jaime Rodriguez Ardila, Ever Nicolás Camelo Parra
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Abstract
A method for sampling and measuring a hydrogen concentration of a gas in a subsurface formation includes boring a hole in the subsurface formation using a drill string. A gas probe is coupled to a lower end of the drill string. The method also includes opening the gas probe to collect the gas from the subsurface formation. The method also includes drawing the gas up through the drill string after the gas probe is opened. The method also includes measuring the hydrogen concentration of the gas after the gas is drawn up.
Claims15
A method for sampling and measuring a hydrogen concentration of a gas in a subsurface formation, the method comprising:
- boring a hole in the subsurface formation using a drill string, wherein a gas probe is coupled to a lower end of the drill string, wherein the gas probe comprises a retractable sleeve and a gas probe valve;
- opening the gas probe to collect the gas from the subsurface formation;
- drawing the gas up through the drill string after the gas probe is opened, wherein the gas is drawn up to a manifold, and wherein the manifold comprises a metering device and one or more manifold valves;
- opening the gas probe valve after a first of the one or more manifold valves is opened, wherein opening the gas probe valve comprises exerting an upward force on an adapter of the drill string, wherein the adapter couples the drill string to the manifold, wherein the adapter is positioned above the gas probe, and wherein the upward force on the adapter draws the retractable sleeve upward, which opens the gas probe valve and allows the gas to flow therethrough, into the drill string, and to the metering device;
- and
- measuring the hydrogen concentration of the gas after the gas is drawn up.
A method for sampling and measuring a hydrogen concentration of a gas in a subsurface formation, the method comprising:
- boring a hole in the subsurface formation using a drill string, wherein a gas probe is coupled to a lower end of the drill string, wherein the drill string comprises an adapter that is coupled to a manifold, and wherein the manifold is also coupled to a metering device;
- opening the gas probe to collect the gas from the subsurface formation;
- drawing the gas up through the drill string after the gas probe is opened;
- and
- measuring the hydrogen concentration of the gas after the gas is drawn up, wherein the concentration is measured by the metering device, wherein, in response to the hydrogen concentration increasing above a predetermined threshold, the method further comprises:
- installing a collection vessel between the drill string and the metering device, wherein the collection vessel is installed in the manifold, and wherein the gas flows from the drill string and into the collection vessel;
- plugging the collection vessel once the gas flows into the collection vessel;
- and
- analyzing the gas in the collection vessel after the collection vessel is plugged.
A system for sampling and measuring a hydrogen concentration of a gas in a subsurface formation, the system comprising:
- a drill string comprising a gas probe coupled to a lower end thereof, wherein the gas probe is configured to open, which allows the gas from the subsurface formation to flow up through the drill string;
- and
- a manifold coupled to the drill string, wherein the manifold comprises:
- a metering device, wherein the metering device measures the hydrogen concentration of the gas;
- a suction device;
- a collection vessel, wherein the suction device draws the gas from the drill string into the collection vessel;
- a first manifold valve in a first line between the drill string and the metering device;
- a second manifold valve in a second line between the drill string and an inlet of the collection vessel, wherein, in response to the hydrogen concentration increasing above a predetermined threshold:
- the first manifold valve closes, which stops flow of the gas to the metering device;
- and
- the second manifold valve opens, which draws the gas into the collection vessel;
- and
- a third manifold valve coupled to an outlet of the collection vessel, wherein the suction device is configured to draw the gas while the first manifold valve is closed and the second and third manifold valves are open.
A system for sampling and measuring a hydrogen concentration of a gas in a subsurface formation, the system comprising:
- a drill string comprising a gas probe coupled to a lower end thereof, wherein the gas probe comprises a retractable sleeve and a gas probe valve, wherein the gas probe is configured to open, which allows the gas from the subsurface formation to flow up through the drill string, and wherein the gas probe valve is opened by exerting an upward force on an adapter of the drill string;
- and
- a manifold coupled to the drill string, wherein the manifold comprises a metering device, a suction device, and a collection vessel, wherein the upward force on the adapter draws the retractable sleeve upward, which opens the gas probe valve and allows the gas to flow therethrough, into the drill string, and to the metering device, wherein the metering device measures the hydrogen concentration of the gas, and wherein the suction device draws the gas from the drill string into the collection vessel.
Dependencies are inferred from the claim text.