Multi-mode testing tool and method of testing

Details Multi-mode testing tool and method of testing Multi-mode testing tool and method of testing

1986-12-31

1987-12-08

Novosad, Stephen J.

Wells

Submerged well

Testing

166250, 166264, 166321, 166373, E21B 4908, E21B 3410

Patent

active

047113057

ABSTRACT:
A multi-mode testing tool operable as a drill pipe tester, formation tester, nitrogen displacement valve or circulation valve. Tool mode is changed responsive to pressure cycling in the well bore. A ball valve in the tool bore may also be operated by pressure cycling when the tool is in its formation tester mode. Also disclosed is a pressure responsive double-acting piston power mechanism, and a ball and slot ratchet assembly.

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