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US 8,297,376 B2Granted
Coring apparatus with sensors
AssigneeCorpro Systems Limited
InventorPhillipe Cravatte
Life of this patent
Estimating the term…
Abstract
A coring apparatus including an outer core barrel associated with a drill bit; an inner core barrel adapted to accept a core sample; and at least one strain sensor adapted to measure strain experienced by the inner core barrel selected from the group consisting of tension and compression, wherein an output of the at least one strain sensor is indicative of entry of the core sample into the inner core barrel.
Claims22
A coring apparatus comprising:
- an outer core barrel associated with a drill bit;
- an inner core barrel adapted to accept a core sample;
- and
- at least one strain sensor adapted to measure strain experienced by the inner core barrel selected from the group consisting of tension and compression,
- wherein an output of the at least one strain sensor corresponding to a reduction in the tension experienced by the inner core barrel is indicative of entry of the core sample into the inner core barrel.
2 more elements
A method of monitoring a coring operation comprising:
- providing a coring apparatus having an outer core barrel associated with a drill bit, an inner core barrel adapted to accept a core sample, and at least one strain sensor associated therewith;
- inserting the coring apparatus into a downhole borehole;
- collecting data output from the at least one strain sensor corresponding to tension experienced by the inner core barrel;
- transmitting the data output to the surface, said data indicative of downhole conditions such that the operator is provided with real time data of the coring operation;
- and
- whereby reductions in the tension experienced by the inner core barrel provide an indictor of entry of the core sample into the inner core barrel.
3 more elements
A method of gathering information about a coring operation comprising:
- providing a coring apparatus having an outer core barrel associated with a drill bit, an inner core barrel adapted to accept a core sample, at least one strain sensor associated therewith, and a data memory device;
- inserting the coring apparatus into a downhole borehole;
- collecting data output from the at least one strain sensor corresponding to tension experienced by the inner core barrel and storing it in the data memory device;
- and
- retrieving the coring apparatus and a core sample back to surface and analyzing the data stored in the data memory device to provide information on the downhole conditions experienced when the core sample was obtained, and wherein the method includes recording reductions in the tension experienced by the inner core barrel during coring operations, and using said reductions in tension as an indicator of entry of the core sample into the inner core barrel.
2 more elements
A coring apparatus comprising:
- an outer core barrel associated with a drill bit;
- an inner core barrel adapted to accept a core sample;
- and
- at least one strain sensor disposed on a side wall of the inner core barrel, the strain sensor being adapted to measure strain experienced by the inner core barrel selected from the group consisting of tension and compression,
- wherein an output of the at least one strain sensor is indicative of entry of the core sample into the inner core barrel.
2 more elements
A coring apparatus comprising:
- an outer core barrel associated with a drill bit;
- an inner core barrel adapted to accept a core sample;
- and
- at least one strain sensor adapted to measure strain experienced by the inner core barrel selected from the group consisting of tension and compression,
- wherein an output of the at least one strain sensor corresponding to an increase in the compression experienced by the inner core barrel is indicative of friction between the core sample and the inner core barrel.
2 more elements
Dependencies are inferred from the claim text.