Articulated bit-selector coring tool

Details Articulated bit-selector coring tool Articulated bit-selector coring tool

E - Fixed Constructions

21

B

E21B 25/00 (2006.01) E21B 49/06 (2006.01)

Patent

CA 2186691

A multiple coring bit tool and method for taking multiple core samples of a formation traversed by a borehole in one well logging run. In this tool, multiple coring bits are used to cut the core samples. One bit is used to cut each sample. Once the core sample has been taken, the cutting bit containing the core sample is stored. For the next core, a new cutting bit is used and that cutting bit contains that core sample once the coring process is completed. Multiple cutting bits are held in two or more chambers prior to use in the coring process. The bits in one chamber are used to cut core samples from formation location above a certain hardness and the bits in the second chamber are used to cut cores in formations below a certain harness. Two other chambers are incorporated in the tool for storage of the cutting bits once the core sample has been obtained. The sequence of the sample is tracked thereby permitting the identification of any core sample and the location in the formation from which the core sample was taken.

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