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US 6,939,717 B2Granted
Hydrogen sulphide detection method and apparatus
AssigneeSchlumberger Technology Corporation
InventorsLi Jiang, Timothy Gareth John Jones, Oliver Clinton Mullins, Xu Wu
Life of this patent
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Abstract
Described is a downhole method and apparatus for detecting hydrogen sulphide in formation fluids produced in a hydrocarbon well. The sensor system is located within or in communication with an extraction chamber used to extract hydrogen sulphide in a gaseous state from the formation fluid and preferably equipped with renewable sensing elements.
Claims9
A method of detecting hydrogen sulphide in formation fluid samples comprising the steps of:
- positioning a downhole tool having a body and an extendible conduit member within a subterranean wellbore;
- bringing a distal opening of said conduit member in contact with formation surrounding said subterranean wellbore;
- allowing formation fluid to pass from a location within said formation into said body of said downhole tool;
- extracting from said formation fluid hydrogen sulphide into an extraction volume wherein the extraction volume comprises a reactant for creating reaction products of hydrogen sulfide;
- providing at least one sensor system responsive to a chemical compound comprising reaction products of hydrogen sulphide within said extraction volume;
- using said sensor system to determine the presence and/or amount of hydrogen sulphide in said formation fluid.
3 more elements
Dependencies are inferred from the claim text.