Method of stopping flow of fluid up through a pipe bore of a...

Details Method of stopping flow of fluid up through a pipe bore of a... Method of stopping flow of fluid up through a pipe bore of a...

E - Fixed Constructions

21

B

E21B 33/12 (2006.01)

Patent

CA 2119387

The method comprises lower a bridge plug apparatus on a work string into the pipe string to a position where the pipe bore is to be closed; communicating the pipe bore below a packer of the bridge plug apparatus through the bridge plug apparatus with a low pressure zone above the packer to permit the fluid to flow up through the bridge plug apparatus; and engaging the bridge plug apparatus with an internal upset of the pipe string. While the fluid is flowing up through the bridge plug apparatus, pulling upward on the work string and the bridge plug apparatus and thereby sealing the packer against the pipe bore; after the preceding, isolating the pipe bore below the packer from the low pressure zone above the packer and thereby stopping flow of the fluid up through the pipe bore; after the preceding step, disconnecting the work string from the bridge plug apparatus; and after the preceding step, maintaining the bridge plug apparatus in engagement with the internal upset and sealed against the pipe bore due to an upward pressure differential applied to the bridge plug apparatus by the fluid contained therebelow.

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