Multiple-set downhole tool and method

Details Multiple-set downhole tool and method Multiple-set downhole tool and method

1988-12-30

1990-01-16

Dan, Hoang C.

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

166 72, 166238, 166239, 166318, 166334, 166386, E21B 2304

Patent

active

048936782

ABSTRACT:
A downhole tool is provided suitable for multiple setting and unsetting operations in a well bore during a single trip. The downhole tool is suspended in the wellbore from a tubing string, and is activated by dropping a metal ball which plugs the passageway through the tubing string, such that tubing pressure may thereafter be increased to activate the downhole tool. A sleeve is axially movable within a control sub from a ball stop position to a ball release position, and has a cylindrical-shaped interior surface with a diameter only slightly greater than the ball. Collet fingers carried on the sleeve are radially movable from an inward position to an outward position to stop or release the ball as a function of the axial position of the sleeve. Fluid flow through the tubing string is thus effectively blocked when the sleeve is in the ball stop position because of the close tolerance between the sleeve and the ball, while the ball is freely released from the sleeve and through the downhole tool when the sleeve is moved to the ball release position.

REFERENCES:
patent: 3053322 (1962-09-01), Kline
patent: 3112796 (1963-12-01), Myers
patent: 3189095 (1965-06-01), De Rochemont
patent: 3211226 (1965-10-01), Myers et al.
patent: 3524503 (1970-08-01), Baker
patent: 3606924 (1971-09-01), Malone
patent: 3941190 (1976-03-01), Conover
patent: 3948322 (1976-04-01), Baker
patent: 4520870 (1985-06-01), Pringle
patent: 4648448 (1987-03-01), Sanford et al.
patent: 4823882 (1989-04-01), Stokley et al.

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