Staged screen assembly for gravel packing

E - Fixed Constructions – 21 – B

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166/9

E21B 43/04 (2006.01)

Patent

CA 1308017

ABSTRACT STAGED SCREEN ASSEMBLY FOR GRAVEL PACKING A gravel packing process employs a staged screen assembly to prevent sand and other fine particles entrained in the produced hydrocarbon fluids from entering the production tubing and related equipment. The staged screen assembly is provided with a base pipe having rupture disks in its sidewall. The disks rupture at a pre- determined pressure differential during gravel packing to enable leakoff of the carrier fluid from the gravel slurry into the base pipe and recirculation of the carrier fluid back to the wellhead, while ensuring complete and uniform gravel packing of the hydro- carbon production interval without substantial bridging or duning.

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