System for completing multiple well intervals

Abstract

A system and method for completing a well with multiple zones of production is provided, including a casing having a plurality of valves integrated therein for isolating each well zone, establishing communication between each underlying formation and the interior of the casing, and delivering a treatment fluid to each of the multiple well zones. Furthermore, the present invention further discloses mechanisms for actuating one or more of the valves including, but not limited to, a dart, a drop ball, a running tool, and control line actuating system.

1 . A system for use in a wellbore having a plurality of well zones, comprising: 
 a casing fixed to the wellbore by cement;    a plurality of valves connected to the casings, each valve comprising: (i) a flow port for establishing communication between the casing and one of the well zones, and    (ii) a sliding sleeve disposed therein for regulating communication via the flow port, the sliding sleeve having an axial bore therein with a mating profile;    an actuating tool comprising a collet adapted to selectively engage with the mating profile of the sliding sleeve of each of the plurality of valves; and    a work string connected to the actuating tool, the work string adapted to axially move the actuating tool in the wellbore.    
   
   
       2 . The system of  claim 1 , further comprising: 
 a coating applied to the housing of each of the plurality of valves, the coasting adapted to decrease the bond of the cement to the housing.    
   
   
       3 . The system of  claim 1 , further comprising: 
 a plurality of lobes formed on the housing of each of the plurality of valves, each lobe protruding radially outward toward the wellbore to decrease the volume of cement residing in an annulus defined by the housing and the wellbore,    wherein a recess is defined between any two adjacent lobes to permit cement to pass through the annulus during cementing operations.    
   
   
       4 . The system of  claim 1 , where in the collet is pumped downhole on a dart and the dart is adapted to shift the sliding sleeve between an open port position and a closed port position.  
   
   
       5 . The system of  claim 1 , wherein establishing communication between the casing and one of the well zones comprises pumping the collet on a dart from the surface into the casing to move the axial bore on the sliding sleeve into an open position.  
   
   
       6 . The system of  claim 5 , further comprising: 
 delivering a treatment fluid to one of the well zones via the open position.    
   
   
       7 . The system of  claim 1 , wherein the collet is run downhole on the work string.  
   
   
       8 . The system of  claim 1 , wherein the collet includes a plurality of fingers having protruding elements for engaging the mating profile of the sliding sleeve when the collet is run downhole on the work string.  
   
   
       9 . The system of  claim 1 , further comprising: 
 a controller included in the actuating tool comprising the collet for receiving pressure pulses emitted from a surface.    
   
   
       10 . The system of  claim 8 , wherein the collet may be actuated between a first position where the fingers are retracted and a second position where the fingers are moved to extend radially outward.  
   
   
       11 . The system of  claim 9 , wherein the collet is actuated when the controller receives receiving pressure pulses emitted from the surface.  
   
   
       12 . The system of  claim 1 , further comprising: 
 a controller included in the actuating tool comprising the collet for receiving pressure pulses emitted from a surface.    
   
   
       13 . The system of  claim 12 , wherein the work string is a slickline.  
   
   
       14 . The system of  claim 13 , wherein the actuating tool includes a tension converter for delivering a signal to the controller of the actuating tool by vertical motion in the slickline.  
   
   
       15 . The system of  claim 14 , wherein the signal is selected from a group consisting of a radio frequency signal, an acoustic signal, a radioactive signal, and a magnetic signal.  
   
   
       16 . The system of  claim 1 , further comprising: 
 the collet includes a plurality of fingers having one end fixed to the actuating tool and another end having a protruding element formed thereon, the collet moveable between a first position whereby the plurality of fingers are retracted and a second position whereby the plurality of fingers are extended radially outward; and    a working string for suspending the collet in the wellbore,    wherein the mating profile on the sliding sleeve is adapted to receive the protruding elements of the plurality of fingers of the collet when the collet is in the second position.    
   
   
       17 . A method for use in a wellbore having a plurality of well zones, comprising: 
 running a casing having a plurality of valves formed therein from a surface down into the wellbore such that each valve is proximate a well zone;    cementing the casing to the wellbore;    opening at least one of the valves to establish communication between the surface and the wellbore; each valve comprising: (i) a flow port for establishing communication between the casing and one of the well zones, and (ii) a sliding sleeve disposed therein for regulating communication via the flow port, the sliding sleeve having an axial bore therein with a mating profile; and wherein opening at least one of the valves includes: 
 actuating an actuating tool comprising a collet adapted to selectively engage with the mating profile of the sliding sleeve of each valve, wherein the actuating tool is connected to a work string which is adapted to axially move the actuating tool in the wellbore.  
   
   
   
       18 . The method of  claim 17 , wherein establishing communication between the casing and one of the well zones comprises pumping the collet on a dart from the surface into the casing to move the axial bore on the sliding sleeve into an open position.  
   
   
       19 . The system of  claim 18 , further comprising: 
 delivering a treatment fluid to one of the well zones via the open position.    
   
   
       20 . The system of  claim 17 , wherein the collet includes a plurality of fingers having protruding elements for engaging the mating profile of the sliding sleeve when the collet is run downhole on the work string.