One-trip packer and perforating gun system

Abstract

A completion tool for gravel pack and frac pack operations for installing a sump packer and perforating a casing in one trip of a work string. The completion tool is disposed on the end of a work string and includes a perforating gun and a packer attached to the distal end of the completion tool by a coupling. The coupling is such that once the packer is set, the rest of the completion tool can be detached from the packer. After detachment, the completion tool can be repositioned to fire the perforating gun. Positioning of the packer and perforating gun may be accomplished by correlating off of other equipment or by use of logging-while-drilling or measurement-while-drilling equipment incorporated into the completion tool.

What is claimed is: 
     
         1 . A completion tool comprising:
 a proximal end for connecting to a work string;   a distal end opposite the proximal end;   a perforating gun disposed between the distal end and the proximal end; and   a packer detachably attached to the distal end by a coupling disposed between the perforating gun and the packer; wherein
 the packer is detachable from the distal end by setting the packer and disengaging the coupling. 
   
     
     
         2 . The completion tool of  claim 1 , wherein
 the work string includes at least one of the group of a segmented work string and coiled tubing.   
     
     
         3 . The completion tool of  claim 1 , wherein
 the packer includes a hydrostatic packer.   
     
     
         4 . The completion tool of  claim 1 , wherein
 the packer is detachably attached to the coupling by at least one shearing member.   
     
     
         5 . The completion tool of  claim 1 , wherein
 the packer is detachably attached to the coupling by a threaded connection.   
     
     
         6 . The completion tool of  claim 1 , further comprising
 at least one of the group of a logging-while-drilling tool and a measurement while drilling tool.   
     
     
         7 . The completion tool of  claim 1 , further comprising
 a second packer disposed between the proximal end and the perforating gun.   
     
     
         8 . A system for completing a wellbore, comprising
 a work string;   a completion tool disposed on the work string, the completion tool comprising:
 a proximal end for connecting to a work string; 
 a distal end opposite the proximal end; 
 a perforating gun disposed between the distal end and the proximal end; and 
 a packer detachably attached to the distal end by a coupling disposed between the perforating gun and the packer; wherein
 the packer is detachable from the distal end by setting the packer and disengaging the coupling. 
 
   
     
     
         9 . The system of  claim 8 , wherein
 the packer includes a hydrostatic packer.   
     
     
         10 . The system of  claim 8 , wherein
 the packer is detachably attached to the coupling by at least one shearing member.   
     
     
         11 . The system of  claim 8 , wherein
 the packer is detachably attached to the coupling by a threaded connection.   
     
     
         12 . The system of  claim 8 , further comprising
 one of the group of a logging-while-drilling tool and a measurement while drilling tool.   
     
     
         13 . The system of  claim 8 , further comprising
 a second packer disposed between the proximal end and the perforating gun.   
     
     
         14 . A method of installing a packer in a wellbore, comprising
 positioning a completion tool within the wellbore, the completion tool comprising
 a proximal end for connecting to a work string; 
 a distal end opposite the proximal end; 
 a perforating gun disposed between the distal end and the proximal end; and 
 a packer detachably attached to the distal end by a coupling disposed between the perforating gun and the packer; wherein
 the packer is detachable from the distal end by setting the packer and disengaging the coupling; 
 
   setting the packer within the wellbore; and   detaching the packer by disengaging the coupling.   
     
     
         15 . The method of  claim 14 , wherein
 the completion tool is inserted into the wellbore on a work string, the work string including at least one of the group of a segmented work string and coiled tubing.   
     
     
         16 . The method of  claim 14 , wherein
 the packer includes a hydrostatic packer and setting the packer is performed by increasing hydrostatic pressure within the wellbore.   
     
     
         17 . The method of  claim 14 , further comprising
 setting a second packer, the second packer being disposed between the proximal end and the perforating gun.   
     
     
         18 . The method of  claim 14 , wherein
 the packer is coupled to the perforating gun by at least one shearing member, and   the step of detaching the perforating gun from the packer comprises
 retracting the perforating gun, causing the at least one shearing member to shear. 
   
     
     
         19 . The method of  claim 14 , wherein
 the packer is coupled to the perforating gun by a threaded connection, and   the step of detaching the perforating gun from the packer comprises
 rotating the perforating gun, causing the threaded connection to disengage. 
   
     
     
         20 . The method of  claim 14 , wherein
 the completion tool further comprises at least one of the group of a logging-while-drilling tool and a measuring-while-drilling tool and data from the logging-while-drilling tool is used to position the completion tool within the wellbore.