Packer variable volume excluder and sampling method therefor

E - Fixed Constructions – 21 – B

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Details

E21B 33/124 (2006.01) E21B 49/08 (2006.01)

Patent

CA 2620050

A down hole apparatus (100) includes a first expandable packer (102) and a second expandable packer (102), where the first expandable packer longitudinally spaced from the second expandable packer. The apparatus further includes an optional expandable bladder (106) disposed at a longitudinal location between the first expandable packer and the second expandable packer. The expandable bladder inflates to displace drilling fluid between the first and second bladder elements. The down hole apparatus can optionally displace drilling fluid between the first and second bladder elements with another fluid. Fluids and/or slurry can be selectively removed using ports (150, 152) between the first and second expandable packers, and optionally placed in sample chambers, or expelled to the bore hole.

Appareil fond de trou (100) comportant un premier packer dilatable (102) et un deuxième packer dilatable (102), le premier packer dilatable étant espacé longitudinalement du deuxième packer dilatable. L'appareil comporte en outre éventuellement une poche dilatable (106) occupant une position longitudinale entre le premier packer dilatable et le deuxième packer dilatable. La poche dilatable se gonfle pour déplacer du fluide de forage entre des premier et deuxième éléments de poche. L'appareil fond de trou peut éventuellement déplacer du fluide de forage entre les premier et deuxième éléments de poche conjointement avec un autre fluide. Les fluides et/ou la boue peuvent être évacués de façon sélective par des orifices (150, 152) situés entre les premier et deuxième packers dilatables, et éventuellement transférés dans des chambres d'échantillonnage, ou expulsés dans le puits de forage.

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