Method of running a tubing hanger and internal tree cap simultaneously

Abstract

An assembly for the completion of a subsea horizontal tree that includes a tubing hanger, an internal tree cap, and a running tool.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present application is a continuation-in-part of U.S. utility patent application Ser. No. 11 / 690,373, attorney docket number V2006068, filed on Mar. 23, 2007, the disclosure of which is incorporated herein by reference.FIELD OF THE INVENTION[0002]This invention relates in general to subsea wellhead equipment, and in particular to a method of simultaneously running an internal tree cap and tubing hanger into a subsea horizontal treehead.BACKGROUND OF THE INVENTION[0003]A conventional subsea horizontal tree includes a wellhead housing which contains one or more casing hangers, one of which is secured to a string of production casing that extends into the well. A horizontal tree body, also known as a tree or tubing spool or spool tree, mounts to the top of the wellhead housing and seals to it. The horizontal tree body has a central bore axially through it and a horizontal or lateral production flow passage through the wall of the horizon...

AI Technical Summary

Problems solved by technology

This results in two drill pipe trips to the seafloor.

In deeper water wells, this results in potentially significant rig time savings.

However, it comes with the compromise that the two plugs rely on the single tubing hanger lockdown mechanism to ensure that the tubing string assembly does not part from the tree and cause potentially significant leakage of the well bore to the environment.

Images