Fluid flow control and mechanical actuation system for...

Details Fluid flow control and mechanical actuation system for... Fluid flow control and mechanical actuation system for...

E - Fixed Constructions

21

B

E21B 3/00 (2006.01) E21B 10/32 (2006.01)

Patent

CA 2048500

ABSTRACT OF THE DISCLOSURE A fluid flow control and mechanical actuation system for controlling fluid flow in and mechanically actuating a tool includes an upwardly biased and vertically movable actuating assembly for actuating a tool upon downward movement. Two passages extend through the actuating assembly. A vertically and rotationally movable valve having a radially offset bore extending therethrough is also provided. The valve controls fluid flow to the two passages in the actuating assembly upon successive downward strokes of the valve so that when the bore in the valve is aligned with one of the passages in the actuating assembly, a pressure build-up occurs which is sufficient to cause the actuating assembly to move downwardly for actuating a tool. On the other hand, when the bore in the valve is aligned with the other passage in the actuating assembly, the build-up of pressure does not occur and the downward movement of the actuating assembly is prevented. The fluid flow control and mechanical actuation system can be used in conjunction with an underreamer as well as many other types of down-hole tools.

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