Multi-mode well tool with hydraulic bypass assembly

Details Multi-mode well tool with hydraulic bypass assembly Multi-mode well tool with hydraulic bypass assembly

1994-09-30

1996-01-09

Tsay, Frank S.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166386, 166321, E21B 3410

Patent

active

054821193

ABSTRACT:
An annulus pressure responsive tool of the type which contains lateral circulation ports and a ball valve, each operable between open and closed positions to configure the tool into different modes of operation. These modes include a well test position in which the ball valve is open and the circulation ports are closed, a blank position in which the ball valve and circulation ports are both closed, and a circulating position in which the ball valve is closed and the circulating ports are open. Through manipulation of annulus pressure, the tool mode can be changed during the annulus pressure release to move out of the well test position and into the blank and circulating positions. An operating mandrel assembly is slidably disposed within the exterior housing of the tool and its movement dictates the positions of both the circulation ports and the ball valve. The operating mandrel is moveable by means of an annulus pressure conducting channel which is capable of receiving:, storing and releasing annulus pressure increases. A ratchet assembly associates the operating mandrel assembly and housing and functions as an overrideable position controller to dictate response of the operating mandrel assembly to annulus pressure changes.

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