Rigless intervention

Abstract

A method comprising providing a first vessel floating on a surface of a body of water; connecting a first line from the first vessel to a subsea structure; lifting the subsea structure within the body of water; connecting a second line from a second vessel to the subsea structure; disconnecting the first line from the subsea structure; and lifting subsea structure to the second vessel with the second line.

1 . A method, comprising:
 providing a first vessel floating on a surface of a body of water;   connecting a first line from the first vessel to a subsea structure;   lifting the subsea structure within the body of water;   connecting a second line from a second vessel to the subsea structure;   disconnecting the first line from the subsea structure; and   lifting subsea structure to the second vessel with the second line.   
     
     
         2 . The method of  claim 1 , wherein the first line from the first vessel to the subsea structure is connected to at least one subsea buoy to isolate the first vessel's heave from the subsea structure. 
     
     
         3 . The method of  claim 1 , further comprising supporting the subsea structure with a platform on the second vessel, and further comprising disconnecting the second line from the subsea structure. 
     
     
         4 . The method of  claim 1 , further comprising lifting the subsea structure onto a deck of the second vessel. 
     
     
         5 . The method of  claim 1 , further comprising transporting the subsea structure to land. 
     
     
         6 . The method of  claim 1 , wherein the first vessel comprises a work boat with at least one of a winch and a crane. 
     
     
         7 . The method of  claim 1 , wherein the second vessel comprises an FPSO. 
     
     
         8 . The method of  claim 1 , wherein the subsea structure comprises an electrical submersible pump. 
     
     
         9 . The method of  claim 1 , further comprising transporting the subsea structure with the first vessel towards the second vessel a distance from 5 kilometers to 100 kilometers. 
     
     
         10 . A method, comprising:
 providing a first vessel floating on a surface of a body of water;   connecting a first line from the first vessel to a subsea structure;   lowering the subsea structure within the body of water;   connecting a second line from a second vessel to the subsea structure;   disconnecting the first line from the subsea structure;   moving the second vessel, the second line, and the subsea structure to a desired installation location; and   installing the subsea structure at the desired location within the body of water.