Drill pipe bridge plug

Patent · Tue Oct 22 04:00:00 EDT 1991

OSTI ID:5519277

Winslow, D W; Brisco, D P

This patent describes a method of stopping flow of fluid up through a pipe bore of a pipe string in a well. It comprises: lowering 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; 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; 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; disconnecting the work string from the bridge plug apparatus; and 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.

• Assignee: Halliburton Co., Duncan, OK (United States)
• Patent Number(s): US 5058684; A
• Application Number: PPN: US 7-647938A
• OSTI ID: 5519277
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
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& Exploration
440400 -- Well Logging Instrumentation
47 OTHER INSTRUMENTATION
CONTROL EQUIPMENT
DRILL PIPES
DRILLING
DRILLING EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
PIPES
WELL DRILLING