Multi-stage Treatment System with Work String Mounted Operated Valves Electrically Supplied from a Wellhead

Abstract

A lower completion for open or cased hole is delivered on a work string. Electric power extends from a remote location past a production packer and to an array of electrically operated sleeves alternating with packers. An inductive coupling or wet connect allows the work string to release from the production packer and a production string tagged into the production packer for continued operation of the sliding sleeves. In the event of an incipient screenout a different sliding sleeve can be opened quickly or a sliding sleeve near hole bottom can be opened to maintain flow. The sliding sleeves can be directly or indirectly operated with electric power from a surface or wellhead location that is above the production packer. A wet connect or inductive coupler allows removal of the work string and replacement with a production string for continuing functionality of the sliding sleeves.

I claim: 
     
         1 . A borehole treating method, comprising:
 providing electric power to a plurality of lower completion valves from uphole of a production packer supporting a lower completion, said production packer supported by a work string;   operating said valves with said provided electric power for selective formation access from the lower completion to perform a treatment.   
     
     
         2 . The method of  claim 1 , comprising:
 replacing said work string with a production string after said treatment;   
       continuing to provide electric power to said valves from uphole of the production packer along the production string;
 operating said valves in aid of production from the formation. 
 
     
     
         3 . The method of  claim 2 , comprising:
 isolating said valves in discrete isolated intervals using packers.   
     
     
         4 . The method of  claim 2 , comprising:
 engaging and releasing said lower completion from said work string with an inductive coupler or wet connect.   
     
     
         5 . The method of  claim 2 , comprising:
 engaging said production string to said lower completion with an inductive couple or a wet connect.   
     
     
         6 . The method of  claim 4 , comprising:
 connecting said valves with a valve cable to a lower portion of said inductive coupler or said wet connect;   extending said cable from an upper portion of said inductive coupler or said wet connect past said production packer and further uphole.   
     
     
         7 . The method of  claim 3 , comprising:
 providing at least one sensor to transmit well data to above said production packer from each said interval on a data cable, said data cable extending to an inductive coupler or wet connect and further uphole on said work string;   disconnecting said data cable at said inductive coupler or wet connect when removing said work string;   reconnecting said data cable at said inductive coupler or wet connect when producing with said production string.   
     
     
         8 . The method of  claim 6 , comprising:
 removing said upper portion of said inductive coupler or wet connect with a part of said valve cable when disconnecting said work string from said lower completion;   replacing said upper portion of said inductive coupler or wet connect with said part of said valve cable when connecting said production string to said lower portion of said inductive coupling or wet connect.   
     
     
         9 . The method of  claim 1 , comprising:
 providing sliding sleeves as said lower completion valves.   
     
     
         10 . The method of  claim 1 , comprising:
 locating at least one of said completion valves in an isolated interval to a portion of a formation that is not of production interest;   opening said at least one completion valve in the event a screenout is detected.   
     
     
         11 . The method of  claim 1 , comprising:
 opening more than a single said completion valve at a time in the event a screenout is detected.   
     
     
         12 . The method of  claim 1 , comprising:
 using said provided electric power to directly operate said lower completion valves with an electric motor in opposed directions multiple times.   
     
     
         13 . The method of  claim 1 , comprising:
 using said provided electric power to indirectly operate said lower completion valves by producing hydraulic pressure to opposed sides of an actuating piston for said lower completion valves.   
     
     
         14 . The method of  claim 1 , comprising:
 opening said lower completion valves in an uphole or downhole direction sequentially or in a random order.   
     
     
         15 . The method of  claim 1 , comprising:
 locating said lower completion in open hole.   
     
     
         16 . The method of  claim 1 , comprising:
 locating said lower completion in cased hole.   
     
     
         17 . The method of  claim 1 , comprising:
 performing fracturing as said treatment.