Method for providing a subsea template system with a tail pipe and a subsea template system

Abstract

A method for providing a subsea template system with a tail pipe, and a subsea template system are disclosed. The subsea template system comprising a structure including a guide with an opening, and including a plurality of supports for engaging a seabed; a tail pipe being cylindrical and comprising a serrated end structure at a first (lower) end of the tail pipe, the tail pipe arranged at the opening, and the tail pipe comprising an interface for rotating and axially move the tail pipe relative to the structure. The method comprising: placing the structure and the tail pipe on the seabed; rotating and moving axially the tail pipe relative to the guide and into the seabed; drilling with the drill string an opening for an outer conductor casing; and installing the outer conductor casing and applying cement between the outer conductor casing and the tail pipe.

1 - 15 . (canceled) 
     
     
         16 . A method for providing a subsea template system on a seabed, the method comprising:
 placing the subsea template system on the seabed, the subsea template system including:
 a structure including a guide with an opening for a well, the structure including a plurality of supports for engaging the seabed, 
 a tail pipe arranged within the opening, the tail pipe being cylindrical, the tail pipe including a serrated end structure at a first end of the tail pipe; 
   rotating and moving axially the tail pipe relative to the guide and into the seabed to remain in the sea bed;   drilling an opening in the seabed, inside the tail pipe, the opening of the seabed for receiving an outer conductor casing;   installing the outer conductor casing in the opening of the seabed; and   applying cement between the outer conductor casing and the tail pipe.   
     
     
         17 . The method of  claim 16 , wherein placing the subsea template system on the seabed comprises:
 installing the structure on the seabed; and   installing the tail pipe into the guide of the structure.   
     
     
         18 . The method of  claim 16 , wherein the subsea template system further comprises a temporary lock coupled to the guide for locking the tail pipe relative to the guide. 
     
     
         19 . The method of  claim 18 , wherein placing the subsea template system on the seabed comprises:
 locking the tail pipe to the guide with the temporary lock;   installing the structure on the seabed; and   releasing the temporary lock.   
     
     
         20 . The method of  claim 16 , wherein the tail pipe further comprises an interface for rotating and axially move the tail pipe relative to the structure. 
     
     
         21 . The method of  claim 20 , wherein rotating and moving axially the tail pipe relative to the guide and into the seabed to remain in the seabed comprises:
 lowering and connecting a drill string to the interface; and   rotating the drill string and thereby the rotating the tail pipe while applying weight on the tail pipe to move the tail pipe axially relative to the structure.   
     
     
         22 . The method of  claim 16 , wherein the tail pipe further comprises an interface for rotating and axially move the tail pipe relative to the structure. 
     
     
         23 . The method of  claim 22 , wherein rotating and moving axially the tail pipe relative to the guide and into the seabed to remain in the seabed comprises:
 installing a dedicated tool on a drill string for connecting the drill string to the interface.   
     
     
         24 . The method of  claim 16 , wherein the subsea template system further comprises a stop defined by the guide for restricting axial downward movement of the tail pipe relative to the structure. 
     
     
         25 . The method of  claim 24 , further comprising rotating and moving axially the tail pipe until the stop restricts the axial movement of the tail pipe relative to the structure. 
     
     
         26 . The method of  claim 16 , wherein the guide comprises a first guide for the tail pipe and a second guide for the conductor casing. 
     
     
         27 . The method of  claim 26 , further comprising:
 rotating and moving axially the tail pipe relative to the guide while guiding the tail pipe with the first guide, and   installing the outer conductor casing while guiding the conductor casing with the second guide.   
     
     
         28 . A subsea template system comprising:
 a structure including a guide with an opening for a well, the guide including a first guide for the tail pipe and a second guide for an outer conductor casing, the guide including a visual indicator for determining an end position for the tail pipe, the structure including a plurality of supports for engaging a seabed; and   a tail pipe arranged within the opening, the tail pipe being cylindrical, the tail pipe including a serrated end structure at a first end of the tail pipe.   
     
     
         29 . The subsea template system of  claim 28 , wherein the tail pipe further comprises a stop for restricting axial movement of the tail pipe relative to the structure, the stop being a flange for engaging a landing shoulder of the guide. 
     
     
         30 . The subsea template system of  claim 28 , wherein the tail pipe further comprises a stop for restricting axial movement of the tail pipe relative to the structure, the stop being a snap ring interacting with a groove of the guide. 
     
     
         31 . The subsea template system of  claim 28 , wherein the tail pipe further comprises an interface for rotating an axially move the tail pipe relative to the structure, and wherein the interface is connectable to a drill string. 
     
     
         32 . The subsea template system of  claim 31 , wherein the interface is connectable to a drive system coupled to the structure, the drive system configured for rotating and moving axially the tail pipe into the seabed. 
     
     
         33 . The subsea template system of  claim 28 , further comprising a temporary lock coupled to the guide for locking the tail pipe relative to the guide. 
     
     
         34 . The subsea template system of  claim 28 , wherein the first guide for the tail pipe is removable. 
     
     
         35 . The subsea template system of  claim 28 , wherein the first guide for the tail pipe has a inner diameter smaller than the second guide for the outer conductor casing.