Patent ID: 8403067

Claim:
A bypass valve apparatus for assembly in a tubing string inserted in a subterranean wellbore wherein the tubing string contains well fluids and forms an annulus between the tubing string and the wellbore, the valve comprising: an elongated tubular wailed body comprising a main body and mandrel for connection in the tubing string, the mandrel mounted to extend axially into and move axially with respect to the main body, a passageway extending axially through the body; a bypass passageway extending radially through the wall of the body; and a sleeve valve element mounted in the body to rotate into and out of fluid engagement with the bypass passageway to selectively block and permit flow through passageway whereby well fluids flow into the body flow through the bypass passageway, the sleeve mounted to rotate as the main body and mandrel axially move with respect to each other.