Annular fracturing combo service tool

Abstract

An annular fracturing combo tool and method for perforating and annular fracturing multiple zones of a wellbore on a single trip, the tool being releasably connected to coiled tubing. The annular fracturing combo tool may include a locating device connected beneath a packing device used to hydraulically isolate a portion of the wellbore. The packing device may be connected beneath a sand jetting sub. The sand jetting sub may be releasably connected to an end of coiled tubing, which is used to run the annular fracturing combo tool 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. A yo-yo disconnect tool may releasably connect the annular fracturing combo tool to the end of coiled tubing.

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