Patent ID: 7318480
Filing Date: 2008-01-15
Classification: E21B

Abstract:
1. A method for performing an operation in a subsea wellhead assembly through a riser extending between the wellhead assembly and a surface platform, comprising: (a) connecting a surface blowout preventer to an upper portion of the riser; (b) connecting a tool to a string of conduit; (c) connecting a control line to the tool, extending the control line alongside the conduit and lowering the tool and control line through the blowout preventer and the riser; (d) mounting a slick joint to an upper end of the conduit when the tool is near the wellhead assembly, the slick joint having a central axial bore and a cylindrical exterior, and linking the control line to the surface platform through a control line passage located outward from the bore in the slick joint; and (e) communicating with the tool via the control line and performing an operation in the wellhead assembly with the tool.