Rigless well completion method

Abstract

A method and system for completing a well below the bottom of a body of water includes assembling a completion string at a location away from a location of the wellbore, moving the assembled completion string to the location of the wellbore and inserting the assembled completion string into the wellbore.

1 . A method for completing and re-completing a well below the bottom of a body of water, comprising:
 assembling a well completion string at a location away from a location of the wellbore to form an assembled well completion string;   moving the assembled well completion string to the location of the wellbore; and   inserting the assembled well completion string into the wellbore.   
   
   
       2 . The method of  claim 1  wherein the assembling is performed substantially horizontally. 
   
   
       3 . The method of  claim 2  wherein the moving is performed by suspending in the water the assembled well completion string from at least one vessel. 
   
   
       4 . The method of  claim 1  wherein the assembling is performed by moving one end of the well completion string into the body of water by towing from a vessel while segments of the well completion string are coupled to the other end of the string. 
   
   
       5 . The method of  claim 1  wherein the moving comprises suspending the assembled well completion string from a vessel disposed proximate each end of the well completion string. 
   
   
       6 . The method of  claim 1  wherein a well completion string is removed from a well and then fully or partially disassembled horizontally at a location away from the wellbore 
   
   
       7 . The method of  claim 1  wherein the well completion string is a drill-string. 
   
   
       8 . A method for wellbore intervention, comprising:
 lifting a pipe string from within a wellbore wherein the wellbore is situated by winching one end of the pipe string thereof toward a first vessel on the surface of the water;   moving the vessel away from a location of the wellbore;   lifting the other end of the pipe string toward the surface of the water by winching the other end toward a second vessel on the surface of the water; and   moving the first and the second vessels away from the location of the wellbore.   
   
   
       9 . The method of  claim 8  further comprising moving the pipe string to a location away from the location of the wellbore and performing at least one repair operation on the pipe string. 
   
   
       10 . A safety and guiding assembly comprising:
 a substantially cylindrical body having a proximate end, a distal end, and an outer circumference;   an upper guide funnel, the upper guide funnel mechanically connected to the proximate end of the substantially cylindrical body and adapted to receive a well completion assembly; and   a connector, the connector mechanically connected to the distal end of the substantially cylindrical body and adapted to fasten the substantially cylindrical body to a BOP.   
   
   
       11 . The assembly of  claim 10  further comprising a buoyancy tank, the buoyancy tank secured to the outer circumference of the substantially cylindrical body. 
   
   
       12 . The assembly of  claim 10  further comprising a pipe grabber, the pipe grabber disposed on the outer circumference of the substantially cylindrical body. 
   
   
       13 . The assembly of  claim 10  further comprising a control umbilical, the control umbilical in mechanical connection with the substantially cylindrical body. 
   
   
       14 . The assembly of  claim 13  further comprising a camera, the camera in electrical connection with the control umbilical. 
   
   
       15 . The assembly of  claim 14  further comprising a movable arm, the arm in mechanical connection with the camera and in mechanical connection with the substantially cylindrical body.