Downhole tools with inflatable packers and method of operating t

Details Downhole tools with inflatable packers and method of operating t Downhole tools with inflatable packers and method of operating t

1992-08-24

1993-12-07

Bui, Thuy M.

Wells

Processes

Placing or shifting well part

166187, 166191, E21B 33122

Patent

active

052676170

ABSTRACT:
A straddle packer is disclosed using two inflatable packing elements mounted on a mandrel. After the packing elements are inflated, the mandrel can be moved relative to the packing elements to various positions to sample, test, treat, etc. the formation. Resilient connecting means between the mandrel and the packer require a substantial force that is detectable at the surface to move the mandrel to another position. A pin and J-slot control the movement of the mandrel relative to the packer and limit the movement so that a substantial increase in force at the surface indicates that the mandrel is properly positioned.

REFERENCES:
patent: 2741313 (1956-04-01), Bagnell
patent: 4535843 (1985-08-01), Jageler
patent: 4566535 (1986-01-01), Sanford
patent: 4815538 (1989-03-01), Burroughs
patent: 4869324 (1989-09-01), Holder
patent: 4913231 (1990-04-01), Muller et al.
patent: 4962815 (1990-10-01), Schultz et al.

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