Shoe for wellbore lining tubing

Abstract

This invention relates to a shoe for wellbore lining tubing and to a method of locating wellbore lining tubing in a wellbore. In one embodiment, a shoe () is disclosed which includes a tubular outer body () that is coupled to a wellbore lining tubing (), and a tubular inner body () located within the outer body and coupled to fluid supply tubing (). A generally annular flow area () is defined between the bodies which is in selective fluid communication with the well-bore (), for the return flow of fluid from the wellbore through a flow port () in the outer body, along the shoe and into an annulus () defined between the wellbore lining tubing and the fluid supply tubing. A valve assembly () of the shoe has an actuating member () located within the inner body, and a flow controller () for selectively closing the flow port. A ball () is used to prevent further fluid flow through the inner body into the wellbore. Exposure of the actuating member to fluid at a first fluid pressure then causes the actuating member to move to an actuating position where the flow controller closes the flow port. Exposure to fluid at a second fluid pressure higher than said first pressure reopens fluid flow from the inner body into the wellbore.