Sub-Surface Deployment Valve
OwnerPhilip Headinventor
Life of this patent
Estimating the term…
Abstract
A sub surface deployment valve which is particularly suitable for use in underbalanced drilling operations which can be installed through an existing tubular string comprises a radially expandable body (1) having an internal bore and a valve element (2) capable of closing off the internal bore. The deployment valve can be installed by passing the valve through the existing tubular and then radially expanding the radially expandable body of the deployment valve to form a connection resulting from the interference between the external surface of the deployment valve and the tubular string.
Claims12
1-11. (canceled)
A sub-surface deployment valve comprising a radially expandable body having an internal bore and a valve element capable of closing off the internal bore.
A method for drilling a wellbore having located within the wellbore a tubular string comprises positioning a deployment valve at least partially within the tubular string such that, once the deployment valve is installed, a drill string can be moved through the deployment valve wherein the deployment valve comprises a radially expandable body with an internal bore and a valve element capable of closing off the internal bore, the method further comprising attaching the deployment valve to or in the tubular string by radially expanding the radially expandable body of the deployment valve to form a connection resulting from the interference between the external surface of the deployment valve and the tubular string
Dependencies are inferred from the claim text.