Backpressure valve for wireless communication

Details Backpressure valve for wireless communication Backpressure valve for wireless communication

E - Fixed Constructions

21

B

E21B 47/18 (2006.01) E21B 34/06 (2006.01)

Patent

CA 2668085

A backpressure valve. The backpressure valve may be configured to maintain a substantially controlled pressure in coiled tubing uphole thereof while simultaneously being compatible with a pressure pulse tool downhole thereof. The backpressure valve includes pressure generating capacity below its internal valve assembly so as to avoid the tendency of the assembly to throttle open and closed. Furthermore, the pressure generation is achieved in a manner avoiding cavitation. As a result, once the backpressure valve is opened, the pressure pulse tool is able to reliably communicate with surface equipment at the oilfield.

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