Flow tube exercising tool

Details Flow tube exercising tool Flow tube exercising tool

2006-05-02

2008-03-25

Tsay, Frank (Department: 3676)

Wells

Valves, closures or changeable restrictors

Longitudinally movable operator

C166S332500

Reexamination Certificate

active

07347269

ABSTRACT:
A flow tube exercising tool and method for use are described for actuating the flow tube of a downhole safety valve in order to remove build ups of scale and debris from the safety valve and ensure proper operation. The exercising tool provides a lower engagement portion that underlies the lower end of the safety valve flow tube so that upward movement of portions of the exercising tool will move the flow tube upwardly. An upper engagement portion overlies the upper end of the flow tube so that downward movement of portions of the exercising tool will move the flow tube downwardly. Only a single trip of the flow tube exercising tool is necessary to accomplish multiple upward and downward movements of the flow tube.

REFERENCES:
patent: 4273194 (1981-06-01), Pringle et al.
patent: 4624315 (1986-11-01), Dickson et al.
patent: 4796705 (1989-01-01), Carmody et al.
patent: 5167284 (1992-12-01), Leismer
patent: 6273187 (2001-08-01), Voisin, Jr. et al.

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