Annular fracturing service tool system

Abstract

An annular fracturing device and method for perforating and annular fracturing multiple zones of a wellbore on a single trip, the annular fracturing device being connected to coiled tubing. The annular fracturing device may include a locating device connected beneath a packing device used to hydraulically isolate a portion of the wellbore. The packing device may be releasably connected to an abrasive perforating device, such as a sand jetting sub. The sand jetting sub may be connected to the bottom of coiled tubing, which is used to run the annular fracturing device into the well bore and to supply the sand jetting sub with abrasive material to perforate the wellbore. The coiled tubing may also supply the sand jetting sub with fluid to circulate out of the sand jetting sub during the fracturing process.

1 . An annular fracturing device for use with coiled tubing, the device comprising:
 a packing device, wherein the packing device may be actuated to isolate a portion of a wellbore;   a locating device to determine the position of the annular fracturing device within the wellbore;   a sand jetting sub having at least one fluid port on the exterior, wherein the sand jetting sub is connectable to an end of coiled tubing and the at least one fluid port of the sand jetting sub is in fluid communication with the coiled tubing; and   a connecting device connected above the packing device, wherein the connecting device is releasably connected beneath the sand-jetting sub.   
   
   
       2 . The device of  claim 1 , wherein the locating device is connected beneath the packing device. 
   
   
       3 . The device of  claim 2 , wherein the locating device comprises a collar locator. 
   
   
       4 . The device of  claim 1 , wherein the locating device is a part of the packing device. 
   
   
       5 . The device of  claim 1 , wherein the connecting device is a yo-yo disconnect tool. 
   
   
       6 . The device of  claim 1 , wherein the packing device is a retrievable bridge plug. 
   
   
       7 . The device of  claim 6 , wherein the retrievable bridge plug is a cup type retrievable bridge plug. 
   
   
       8 . The device of  claim 1 , wherein the packing device is a mechanically or hydraulically set packer. 
   
   
       9 . A method of annular fracturing a zone within a wellbore, the method comprising the steps of:
 running a downhole assembly into the wellbore on the bottom end of coiled tubing, the downhole assembly comprising, a sand jetting sub in fluid communication with the coiled tubing, a releasable connector attached beneath the sand jetting sub, a retrievable packing device connected beneath the releasable connector, and a collar locator connected beneath the retrievable packing device;   locating the packing device below the zone of interest within the wellbore;   setting the retrievable packing device below the zone of interest;   releasing the releasable connector from the sand jetting sub;   moving the sand jetting sub up the wellbore to the zone of interest, wherein the sand jetting sub has at least one exterior port in fluid communication with the coiled tubing;   pumping abrasive material down the coiled tubing and through the exterior port of the sand jetting sub to perforate the wellbore at the zone of interest;   moving the sand jetting sub to provide an annular flow path to the wellbore perforations; and   pumping fracturing fluid down the annulus between the wellbore and the coiled tubing.   
   
   
       10 . The method of  claim 9 , wherein the sand jetting sub is moved above the wellbore perforations into a portion of the wellbore having a larger diameter than the zone of interest. 
   
   
       11 . The method of  claim 9 , wherein the sand jetting sub is moved below the wellbore perforations. 
   
   
       12 . The method of  claim 11  further comprising pumping fluid down the coiled tubing and through the exterior port of the sand jetting sub while pumping fracturing fluid down the annulus between the wellbore and the coiled tubing. 
   
   
       13 . The method of  claim 9 , wherein the releasable connector is a yo-yo disconnect tool. 
   
   
       14 . The method of  claim 9 , wherein the packing device is a retrievable bridge plug. 
   
   
       15 . The method of  claim 14 , wherein the retrievable bridge plug is a cup type retrievable bridge plug. 
   
   
       16 . The method of  claim 9 , wherein the packing device is a mechanically or hydraulically set packer. 
   
   
       17 . An apparatus for use on coiled tubing in annular fracturing, the apparatus comprising:
 means for hydraulically isolating a portion of a wellbore;   means for locating a specified location of the wellbore;   means for abrasively perforating a portion of the wellbore, the means for abrasively perforating being connected to coiled tubing and being releasably connected above the means for hydraulically isolating a portion of a wellbore; and   means for selectively releasing the means for abrasively perforating from above the means for hydraulically isolating a portion of the wellbore.   
   
   
       18 . The apparatus of  claim 17 , wherein the means for locating a specified location of the wellbore is connected beneath the means for hydraulically isolating a portion of the wellbore. 
   
   
       19 . The apparatus of  claim 17 , wherein the means for locating a specified location of the wellbore is a part of the means for hydraulically isolating a portion of the wellbore. 
   
   
       20 . The apparatus of  claim 17 , wherein the means for hydraulically isolating a portion of a wellbore is actuated by differential pressure. 
   
   
       21 . The apparatus of  claim 17 , wherein the means for hydraulically isolating a portion of the wellbore is mechanically or hydraulically actuated. 
   
   
       22 . The apparatus of  claim 17 , wherein the releasing means releases due to pulling up on the coiled tubing. 
   
   
       23 . A method of annular fracturing a zone in a well tubular within a wellbore, the method comprising the steps of:
 running a downhole assembly into the well tubular on the bottom end of coiled tubing, the downhole assembly comprising, a sand jetting sub in fluid communication with the coiled tubing, a releasable connector attached beneath the sand jetting sub, a retrievable packing device connected beneath the releasable connector, and a collar locator connected beneath the retrievable packing device;   locating the packing device below the zone of interest within the well tubular;   setting the retrievable packing device below the zone of interest;   releasing the releasable connector from the sand jetting sub;   moving the sand jetting sub up the well tubular to the zone of interest, wherein the sand jetting sub has at least one exterior port in fluid communication with the coiled tubing;   pumping abrasive material down the coiled tubing and through the exterior port of the sand jetting sub to perforate the well tubular and the wellbore at the zone of interest;   moving the sand jetting sub to provide an annular flow path to the well tubular and wellbore perforations; and   pumping fracturing fluid down the annulus between the well tubular and the coiled tubing.   
   
   
       24 . The method of  claim 23 , wherein the sand jetting sub is moved above the well tubular and wellbore perforations into a portion of the wellbore having a larger diameter than the well tubular. 
   
   
       25 . The method of  claim 23 , wherein the sand jetting sub is moved below the well tubular perforations. 
   
   
       26 . The method of  claim 25  further comprising pumping fluid down the coiled tubing and through the exterior port of the sand jetting sub while pumping fracturing fluid down the annulus between the well tubular and the coiled tubing