System and Method For Well Clean-Up

Abstract

A system and method for clean-up and subsea intervention operations in a subsea well or installation, including a light well intervention vessel configured to deploy and connect a subsea well intervention package on a subsea well or installation, and configured to perform subsea intervention operations; and an auxiliary vessel directly coupled to the same subsea well or installation and configured to receive and treat returns from the subsea well.

What is claimed is: 
     
         1 . A system for clean-up and subsea intervention operations in a subsea well or installation, the system comprising:
 a light well intervention vessel configured to deploy and connect a subsea well intervention package on a subsea well or installation, and configured to perform subsea intervention operations; and   an auxiliary vessel directly coupled to the same subsea well or installation and configured to receive and treat returns from the subsea well.   
     
     
         2 . The system of  claim 1 , wherein the light well intervention vessel and the auxiliary vessel are connected substantially simultaneously to the subsea well or installation. 
     
     
         3 . The system of  claim 1 , wherein the auxiliary vessel is selected from the group consisting of a barge, vessel, and tanker. 
     
     
         4 . The system of  claim 1 , wherein the auxiliary vessel is dynamically positioned or moored. 
     
     
         5 . The system of  claim 1 , wherein the light well intervention vessel is configured to perform well testing, well clean-up or well intervention operations. 
     
     
         6 . The system of  claim 1 , wherein the light well intervention vessel or the auxiliary vessel is configured to deploy a return line to the subsea well. 
     
     
         7 . The system of  claim 1 , wherein the light well intervention vessel is configured to perform in-well operations. 
     
     
         8 . A method for clean-up and subsea intervention operations in a subsea well or installation, the method comprising:
 deploying and connecting a subsea well intervention package on a subsea well or installation with a light well intervention vessel;   performing at least one subsea intervention operation with the light well intervention vessel;   directly coupling an auxiliary vessel to the same subsea well or installation; and   receiving and treating returns from the subsea well with the auxiliary vessel.   
     
     
         9 . The method of  claim 8 , further comprising substantially simultaneously connecting the light well intervention vessel and the auxiliary vessel to the subsea well or installation. 
     
     
         10 . The method of  claim 8 , wherein the auxiliary vessel is selected from the group consisting of a barge, vessel, and tanker. 
     
     
         11 . The method of  claim 8 , wherein the auxiliary vessel is dynamically positioned or moored. 
     
     
         12 . The method of  claim 8 , further comprising performing well testing, well clean-up or well intervention operations with the light well intervention vessel. 
     
     
         13 . The method of  claim 8 , further comprising deploying a return line to the subsea well with the light well intervention vessel or the auxiliary vessel. 
     
     
         14 . The method of  claim 8 , further comprising performing in-well operations with the light well intervention vessel.