Subsea test tree intervention package

Patent metadata

Field	Value
Publication number	US-2016273318-A1
Application number	US-201615170280-A
Country	US
Kind code	A1
Filing date	Jun 1, 2016
Priority date	Jun 19, 2014
Publication date	Sep 22, 2016
Grant date	—

Abstract

A riser intervention system for use with a subsea test tree includes a lower riser package spool, an intermediate spool, and a riser stress joint. The lower riser package spool may include a bore and a shoulder projecting into the bore such that the subsea test tree is landable on the shoulder within the lower riser package spool. The intermediate spool is connectable to the lower riser package spool to secure the subsea test tree within the bore of the lower riser package spool such that the lower riser package spool is in fluid communication with the intermediate spool. The riser stress joint is releasably connectable to the intermediate spool using such that the intermediate spool is in fluid communication with the riser stress joint.

First claim

What is claimed is:

1 . A riser intervention system for use with a subsea test tree, the system comprising:
a lower riser package spool comprising a bore; and an intermediate spool configured to connect to the lower riser package spool to secure and restrict axial movement of the subsea test tree within the bore of the lower riser package spool.

2 . The system of claim 1 , wherein the lower riser package spool comprises a shoulder projecting into the bore such that the subsea test tree is configured to land on the shoulder within the lower riser package spool.

3 . The system of claim 2 , wherein the shoulder is vented such that an annulus of the lower riser package spool is configured to be in fluid communication with an annulus of a production tree through the shoulder.

4 . The system of claim 1 , further comprising a riser stress joint configured to releasably connect to the intermediate spool.

5 . The system of claim 4 , further comprising a multi-piece riser stress joint comprising the riser stress joint and the intermediate spool.

6 . The system of claim 4 , further comprising a riser retainer valve positioned, at least partially, within the riser stress joint such that the riser retainer valve is configured to selectively enable fluid flow to the subsea test tree.

7 . The system of claim 1 , wherein the subsea test tree is sealable against the intermediate spool when the subsea test tree is secured within the lower riser package spool.

8 . The system of claim 1 , wherein:
the lower riser package spool comprises an annulus outlet configured to be in fluid communication with an annulus of the lower riser package spool through an annulus outlet flowpath; and an annulus valve is configured to selectively enable fluid flow through the annulus outlet flowpath.

9 . The system of claim 1 , wherein the intermediate spool is configured to directly connect to the lower riser package spool such that the intermediate spool is directly landable on the subsea test tree.

10 . The system of claim 1 , wherein the lower riser package spool is configured to connect to a production tree.

11 . The system of claim 10 , wherein the subsea test tree is sealable against the production tree when the subsea test tree is secured within the lower riser package spool and the lower riser package spool is connected to the production tree.

12 . The system of claim 1 , wherein the subsea test tree is configured to connect to a tubing hanger running tool such that the tubing hanger running tool is positionable within a production tree.

13 . A method of securing a subsea test tree within a riser intervention system, the method comprising:
landing the subsea test tree within a bore of a lower riser package spool; and connecting an intermediate spool to the lower riser package spool, thereby restricting axial movement of the subsea test tree within the bore of the lower riser package spool.

14 . The method of claim 13 , further comprising selectively enabling fluid flow through the subsea test tree with a valve of the subsea test tree.

15 . The method of claim 13 , wherein the landing the subsea test tree comprises directly landing the subsea test tree on a shoulder projecting into the bore of the lower riser package spool.

16 . The method of claim 15 , further comprising enabling fluid flow between the lower riser package spool and the subsea test tree through the shoulder of the lower riser package spool.

17 . The method of claim 13 , further comprising:
connecting a riser stress joint to the intermediate spool; and connecting the lower riser package spool to a production tree.

18 . The method of claim 13 , wherein the connecting the intermediate spool comprises:
sealing the subsea test tree again the intermediate spool; and landing the intermediate spool on the subsea test tree.

19 . A riser intervention system for use with a subsea test tree, the system comprising:
a lower riser package spool comprising:
a bore; and
a shoulder projecting into the bore such that the subsea test tree is configured to land on the shoulder; and
an intermediate spool configured to connect to the lower riser package spool and land upon the subsea test tree to secure and restrict axial movement of the subsea test tree within the bore of the lower riser package spool.

20 . The system of claim 19 , wherein:
a riser stress joint configured to releasably connect to the intermediate spool; and the lower riser package spool is configured to connect to a production tree.

Assignees

• Onesubsea Ip Uk Ltd

Inventors

• Hart Brian

Classifications

• E21B34/045

  adapted to be lowered on a tubular string into position within a blow-out preventer stack, e.g. so-called test trees · CPC title

• E21B33/038 Primary

  Connectors used on well heads, e.g. for connecting blow-out preventer and riser · CPC title

• E21B19/002

  specially adapted for underwater drilling (E21B19/09, E21B19/143 take precedence) · CPC title

• E21B43/013 Primary

  Connecting a production flow line to an underwater well head · CPC title

• E21B17/01

  Risers · CPC title