Method and apparatus for well completion

Abstract

Disclosed is a method and apparatus for performing a well completion. The apparatus comprises a tool string slidably locatable within the well and a shifting tool slidably locatable within the sleeve at an end of a tool string the shifting tool having a central bore therethrough and keys operable to be extended from an outer surface of the shifting tool when the central bore is supplied with the fluid above a predetermined pressure, the keys being engagable upon the sleeve so as to permit the shifting tool to move the sleeve longitudinally within the tubular body. The apparatus further comprises a motor located at a distal end of the tool string having a mill operably rotated thereby and means for selectably actuating one of the shifting tool or motor. The method comprises locating the tool string into the well and providing a fluid flow rate through the tool string to the first fluid flow range to actuate the shifting tool. The method further comprises increasing the fluid flow rate above the first fluid flow range to deactivate the shifting tool and increasing the fluid flow rate above the first fluid flow range and a predetermined fluid flow rate to activate the motor.

What is claimed is: 
     
         1 . An apparatus for performing a well completion comprising:
 a tool string slidably locatable within said well;   shifting tool slidably locatable within said sleeve at an end of a tool string said shifting tool having a central bore therethrough and keys operable to be extended from an outer surface of said shifting tool when said central bore is supplied with said fluid above a predetermined pressure, said keys being engagable upon said sleeve so as to permit said shifting tool to move said sleeve longitudinally within said tubular body;   a motor located at a distal end of said tool string having a mill operably rotated thereby; and   means for selectably actuating one of said shifting tool or motor.   
     
     
         2 . The apparatus of  claim 1  wherein said means for selectably actuating one of said shifting tool or motor is operable to actuate said motor between a first fluid flow range through said tool string. 
     
     
         3 . The apparatus of  claim 2  wherein said means for selectably actuating one of said shifting tool or motor is operable to actuate said shifting tool above a predetermined fluid flow rate. 
     
     
         4 . The apparatus of  claim 3  wherein said predetermined fluid flow rate is higher than said first fluid flow range. 
     
     
         5 . The apparatus of  claim 1  wherein the first fluid flow range is from from 60 galUS/min to 119 galUS/min. 
     
     
         6 . The apparatus of  claim 2  wherein the predermined fluid flow rate is between 120 galUS/min and 160 galUS/min. 
     
     
         7 . The apparatus of  claim 1  wherein a circulation device is located between the shifting tool and motor. 
     
     
         8 . The apparatus of  claim 7  wherein the circulating device is resettable. 
     
     
         9 . A method for performing a well completion comprising:
 locating a tool string into a well having a shifting tool and a motor operably rotating a mill at distal end thereof;   providing a fluid flow rate through said tool string to a first fluid flow range to actuate said motor;   increasing said fluid flow rate above said first fluid flow range to deactivate said motor; and   increasing said fluid flow rate above said first fluid flow range and a predetermined fluid flow rate to activate said shifting tool.   
     
     
         10 . The method of  claim 9  wherein the first fluid flow range is from from 60 galUS/min to 119 galUS/min. 
     
     
         11 . The method of  claim 9  wherein the predermined fluid flow rate is between 120 galUS/min and 160 galUS/min. 
     
     
         12 . A method for hydraulically fracturing a well comprising:
 locating a tool string, mounted with sliding sleeves, into a well having a shifting tool and a motor operably rotating a mill at distal end thereof;   providing a fluid flow rate through said tool string to a first fluid flow range to actuate said motor;   increasing said fluid flow rate above said first fluid flow range to deactivate said motor;   increasing said fluid flow rate above said first fluid flow range and a predetermined fluid flow rate to activate said shifting tool;   opening a sliding sleeve using the shifting tool; and   pumping a fluid above the fracturing pressure of the formation.   
     
     
         13 . The method of  claim 12  wherein the hydraulic fracturing is a pin-point fracturing. 
     
     
         14 . The method of  claim 12  wherein the fluid contains proppant. 
     
     
         15 . The method of  claim 12  wherein the first fluid flow range is from from 60 galUS/min to 119 galUS/min. 
     
     
         16 . The method of  claim 12  wherein the predermined fluid flow rate is between 120 galUS/min and 160 galUS/min. 
     
     
         17 . The method of  claim 12  further comprising closing the sleeve after the formation has been hydraulically fractured. 
     
     
         18 . The method of  claim 17  further comprising hydraulically fracturing at least a further zone. 
     
     
         19 . The method of  claim 12  wherein no sealing element is present on the tool string during the hydraulic fracturing operations.