Flow-operated valve

Details Flow-operated valve Flow-operated valve

E - Fixed Constructions

21

B

E21B 34/08 (2006.01) E21B 34/10 (2006.01) E21B 43/26 (2006.01)

Patent

CA 2361284

A tool string, such as one used for performing fracturing operations or other types of operations, includes a valve, a valve operator, and a sealing assembly that in one arrangement includes packers to define a sealed zone. The tool string is carried on a tubing, through which fluid flow may be pumped to the sealed zone. The valve operator is actuated in response to fluid flow above a predetermined flow rate. When the flow rate at greater than the predetermined flow rate does not exist, the valve operator remains in a first position that corresponds to the valve being open. However, in response to a fluid flow rate at greater than the predetermined flow rate, the valve operator is actuated to a second position to close the valve.

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