Detecting downhole drilling events
AssigneeMontanuniversitäT Leoben
InventorsAsad ELMGERBI, Gerhard THONHAUSER
Life of this patent
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Abstract
An arrangement for detecting a downhole drilling event during a drilling operation by a drill pipe being partially surrounded by a tubular, wherein the arrangement comprises a sensors holder to be mounted inside of the tubular and to be mounted to surround part of the drill pipe, a plurality of sensors for sensing sensor data indicative of downhole drilling events, wherein at least part of the sensors is mounted on the sensors holder, and a processor configured for processing the sensor data to thereby detect a downhole drilling event.
Claims46
An arrangement for detecting a downhole drilling event during a drilling operation by a drill pipe being partially surrounded by a tubular, wherein the arrangement comprises:
- a sensors holder to be mounted inside of the tubular and to be mounted to surround part of the drill pipe;
- a plurality of sensors for sensing sensor data indicative of downhole drilling events, wherein at least part of the sensors is mounted on the sensors holder;
- and
- a processor configured for processing the sensor data to thereby detect a downhole drilling event.
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A computer-readable medium, in which a computer program of detecting a downhole drilling event based on sensor data sensed by a plurality of sensors during a drilling operation by a drill pipe being partially surrounded by a tubular is stored, which computer program, when being executed by one or a plurality of processors, is adapted to carry out or control a method, which comprises:
- classifying possible downhole drilling events, to be sensed by the sensors, into a plurality of issue classes each being indicative of an assigned issue level of an assigned downhole drilling event;
- defining one or more indexes for each of said issue classes, wherein each index corresponds to a parameter, which is detectable by the sensors, in the presence of an assigned downhole drilling event;
- and
- determining a downhole drilling event based on the sensor data, by applying a predictive model for each of the one or more indexes, and using at least one uncertainty window related to the one or more indexes.
A program element of detecting a downhole drilling event based on sensor data sensed by a plurality of sensors during a drilling operation by a drill pipe being partially surrounded by a tubular, which program element, when being executed by one or a plurality of processors, is adapted to carry out or control a method, which comprises:
- classifying possible downhole drilling events, to be sensed by the sensors, into a plurality of issue classes each being indicative of an assigned issue level of an assigned downhole drilling event;
- defining one or more indexes for each of said issue classes, wherein each index corresponds to a parameter, which is detectable by the sensors, in the presence of an assigned downhole drilling event;
- and
- determining a downhole drilling event based on the sensor data, by applying a predictive model for each of the one or more indexes, and using at least one uncertainty window related to the one or more indexes.
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Dependencies are inferred from the claim text.