System for controlling in-riser functions from out-of-riser control system

摘要

A system for controlling a blowout preventer stack and subsea test tree connected to a subsea wellhead assembly, the system comprising: a marine riser engageable with the subsea wellhead assembly; a lower marine riser package configured to be attached to the marine riser in the subsea environment, wherein the blowout preventer is configured to be removably attached to the lower marine riser package; an umbilical located outside of the marine riser adapted to communicate control fluids, electrical signals and/or fiber optic communications to a subsea controller, wherein the subsea controller is configured to receive control fluids and/or signals from the umbilical and to provide functions to the blowout preventer stack and subsea test tree, further wherein the subsea controller stabs into the system above the subsea wellhead assembly. This out-of-marine riser design provides for simplification in design criteria associated with the subsea controller and umbilical system.

主权项

1. A system for use with subsea well equipment including a lower marine riser package, a subsea blowout preventer stack, and a subsea production tree in fluid communication with a subsea wellhead assembly and a marine riser, the system comprising:
a function spool locatable above the subsea wellhead assembly and separable from the subsea production tree, the function spool comprising a connector outside of the function spool; a subsea test tree transportable through the marine riser on a landing string and placeable into at least one of the lower marine riser package and the blowout preventer stack; a surface control system; a communication umbilical in communication with the surface control system and locatable outside of the marine riser, the communication umbilical configured to connect with the function spool connector; the subsea test tree being configured to establish control communication with the communication umbilical through the function spool without rotational orientation of the landing string; and wherein the surface control system is configured to control the subsea test tree through the function spool.