Completion with subsea feedthrough

Abstract

Methods and systems relate to completing a subsea well having a wellhead with required pressure integrity. An electrical coupling delivers power and communication across the wellhead to completion equipment in the well. The electrical coupling may couple with a single conductive line through which power and communications are multiplexed. Multiple flow controlling tools disposed in the well couple to the conductive line with at least one energy storage device charged by the power from the conductive line for powering actuation of the tools.

1 . A subsea completion system for a well, comprising:
 an electrical coupling across a wellhead located subsea;   a single conductive line coupled to the electrical coupling and through which power and communications are multiplexed;   multiple flow controlling tools disposed in the well coupled to the conductive line; and   at least one energy storage device charged by the power from the conductive line for powering actuation of the tools.   
     
     
         2 . The subsea completion system according to  claim 1 , wherein the energy storage device includes a battery. 
     
     
         3 . The subsea completion system according to  claim 1 , wherein the electrical coupling includes an inductive coupling. 
     
     
         4 . The subsea completion system according to  claim 1 , wherein the electrical coupling is limited to less than 100 watt power supply. 
     
     
         5 . The subsea completion system according to  claim 1 , wherein the electrical coupling forms a single and only electricity carrying pathway penetrating across the wellhead for control of all completion equipment in the well. 
     
     
         6 . The subsea completion system according to  claim 1 , wherein the electrical coupling includes a subsea interface compliant with Intelligent Well Interface Standardization (IWIS). 
     
     
         7 . The subsea completion system according to  claim 1 , wherein the conductive line is coupled in the well to an inductive coupling for a lateral to power one of the tools in the lateral. 
     
     
         8 . The subsea completion system according to  claim 1 , wherein the electrical coupling and a lateral connection include inductive couplings. 
     
     
         9 . The subsea completion system according to  claim 1 , further comprising at least one sensor coupled to the conductive line for transfer of data through the wellhead. 
     
     
         10 . The subsea completion system according to  claim 1 , wherein the tools include at least one of a valve, a choke, a packer and a disappearing plug. 
     
     
         11 . A method of completing a well, comprising:
 creating an electrical coupling across a wellhead located subsea;   coupling to the electrical coupling a single conductive line through which power and communications are multiplexed; and   actuating based on the communications sent through the conductive line multiple flow controlling tools disposed in the well and powered by at least one energy storage device charged by the power from the conductive line.   
     
     
         12 . The method according to  claim 11 , wherein the energy storage device includes a battery. 
     
     
         13 . The method according to  claim 11 , wherein the electrical coupling includes an inductive coupling. 
     
     
         14 . The method according to  claim 11 , wherein power supply through the electrical coupling is limited to less than 100 watts. 
     
     
         15 . The method according to  claim 11 , wherein the electrical coupling forms a single and only electricity carrying pathway penetrating across the wellhead for control of all completion equipment in the well. 
     
     
         16 . The method according to  claim 11 , wherein the electrical coupling includes a subsea interface compliant with Intelligent Well Interface Standardization (IWIS). 
     
     
         17 . The method according to  claim 11 , wherein the conductive line is coupled in the well to an inductive coupling for a lateral to power one of the tools in the lateral. 
     
     
         18 . The method according to  claim 11 , wherein the electrical coupling and a lateral connection include inductive couplings. 
     
     
         19 . The method according to  claim 11 , wherein the tools include at least one of a valve, a choke, a packer and a disappearing plug. 
     
     
         20 . The method according to  claim 11 , further comprising at least one sensor coupled to the conductive line for transfer of data through the wellhead.