Method and system for treating a borehole

Abstract

A method for treating an open borehole including running a tool having axially spaced isolation band assemblies disposed thereon. The isolation band assemblies are deployed by pressuring on the tool. Fluid is applied to the open borehole between the isolation band assemblies. The tool is continuously moved through the borehole along a length of the borehole while treating. Further methods and a system for fracturing a borehole are also included.

What is claimed is: 
     
         1 . A method for treating an open borehole comprising:
 running a tool having axially spaced isolation band assemblies disposed thereon;   pressuring on the tool resulting in deployment of the isolation band assemblies;   applying fluid to the open borehole between the isolation band assemblies; and   continuously moving the tool through the borehole along a length of the borehole while treating.   
     
     
         2 . The method of  claim 1 , wherein the pressuring is subsequent to seating a plug in the tool. 
     
     
         3 . The method of  claim 2 , wherein seating the plug includes landing the plug at a seat of a sleeve of the tool, the pressuring includes shifting a sleeve in order to open a port, and the applying includes flowing fluid through the port. 
     
     
         4 . The method of  claim 2 , further comprising dropping the plug from surface. 
     
     
         5 . The method of  claim 1 , wherein the applying is applying fracture pressure. 
     
     
         6 . The method of  claim 1 , wherein the continuously moving is at a progression rate related to a particular formation in which the method is being employed. 
     
     
         7 . The method of  claim 1 , wherein the pressuring includes shifting a sleeve. 
     
     
         8 . The method of  claim 1 , wherein the deployment of the isolation band assemblies includes axially compressing isolation bands of the isolation band assemblies, resulting in radial extension of the isolation bands. 
     
     
         9 . A method for drilling and fracing a borehole in a single trip comprising:
 drilling with a bottom hole assembly (BHA) at a first end of a string, the string including a fracing tool upstring of the BHA, to form a borehole;   deploying axially spaced isolation band assemblies into contact with a wall of the borehole;   applying frac pressure to the wall between the isolation band assemblies; and   continuously drawing the fracing tool in an uphole direction at a frac progression rate while applying the frac pressure.   
     
     
         10 . The method of  claim 9 , wherein the drilling includes circulation. 
     
     
         11 . The method of  claim 9 , wherein the deploying includes seating a plug in a seat of the fracing tool. 
     
     
         12 . The method of  claim 11 , wherein the method includes shifting a sleeve that is operatively connected to the seat to open a port to the wall of the borehole between the isolation band assemblies. 
     
     
         13 . The method of  claim 9 , wherein the deploying includes imposing hoop stress in the borehole. 
     
     
         14 . The method of  claim 9 , wherein pressure is relieved to at least partially retract the isolation band assemblies. 
     
     
         15 . The method of  claim 14 , further comprising circulating. 
     
     
         16 . A method for fracturing a borehole comprising:
 running a tool having axially spaced isolation band assemblies disposed thereon;   pressuring on the tool resulting in deployment of the isolation band assemblies;   applying fluid to the borehole in a zone between the isolation band assemblies; and   continuously moving the tool through the borehole while fracturing the borehole with the fluid.   
     
     
         17 . The method of  claim 16 , wherein the borehole has been fractured or produced prior to performing the method. 
     
     
         18 . A system for fracturing a borehole comprising:
 a tool body;   two or more isolation band assemblies spaced axially apart on the tool body; and   one or more fluid openings in the tool body between the isolation band assemblies.   
     
     
         19 . The system of  claim 18 , wherein the two or more isolation band assemblies are operatively arranged to extend radially outwardly against a borehole wall in order to isolate a zone therebetween. 
     
     
         20 . The system of  claim 19 , wherein the tool body is operatively arranged to be moved a desired length along the borehole while maintaining engagement of the two or more isolation band assemblies with the borehole. 
     
     
         21 . The system of  claim 19 , wherein each of the two or more isolation band assemblies includes an isolation band that is operatively arranged to be axially compressed and radially extended via pressure within the tool body. 
     
     
         22 . The system of  claim 22  further comprising a sleeve having a seat receptive of a plug, the sleeve movable between an initial configuration in which the one or more openings are closed and fluid communication is blocked between the two or more isolation band assemblies and the pressure in the tool body, an intermediate configuration in which the two or more isolation band assemblies become in fluid communication with the pressure in the tool body, and a fully open configuration in which the one or more openings are also in flow communication with the pressure in the tool body. 
     
     
         23 . A method for fracturing a borehole comprising:
 running a tool having axially spaced isolation band assemblies disposed thereon;   pressuring on the tool resulting in deployment of the isolation band assemblies;   applying fluid to the borehole between the isolation band assemblies for fracturing a downhole formation adjacent the borehole;   moving the tool along a length of the borehole; and   forming a continuous fracture pattern in the downhole formation along the length of the borehole.   
     
     
         24 . A method for fracturing a borehole comprising:
 forming an isolation zone in the borehole having a first length; and   fracturing a downhole formation adjacent the isolation zone, wherein a fracture pattern of the fracturing is continuous over a second length longer than the first length.