Resettable circulation tool

Abstract

The present invention generally relates to an abrasive jet drilling assembly. In one aspect, a resettable circulation tool for use in an abrasive jet drilling assembly is provided. The resettable circulation tool includes an inner body having a first port in fluid communication with a bore. The resettable circulation tool further includes an outer body having a second port. Additionally, the resettable circulation tool includes a cam member configured to move along one or more slots, wherein the bodies move relative to each other to selectively align and misalign the first port and the second port as the cam member moves along the slots. In another aspect, a method of using a resettable circulation tool disposed in an abrasive jet drilling assembly includes moving the first and second ports into and out of alignment.

1 . A resettable circulation tool for use in an abrasive jet drilling assembly, the tool comprising:
 an inner body having a first port in fluid communication with a bore;   an outer body having a second port; and   a cam member configured to move along one or more slots, wherein the bodies move relative to each other to selectively align and misalign the first port and the second port as the cam member moves along the slots.   
     
     
         2 . The tool of  claim 1 , wherein the slots include a first slot along which the cam member moves to move the bodies relative to each other to a position where the first and second ports are in alignment. 
     
     
         3 . The tool of  claim 2 , wherein the slots include a second slot along which the cam member moves to move the bodies relative to each other to a position where the first and second ports are not in alignment. 
     
     
         4 . The tool of  claim 3 , wherein the first slot has a length that is longer than a length of the second slot. 
     
     
         5 . The tool of  claim 4 , wherein the first and second slots are disposed axially along the inner surface of the outer body or along the outer surface of the inner body, and wherein the cam is movable between the first and second slots by relative rotation between the inner body and the outer body. 
     
     
         6 . The tool of  claim 1 , wherein the slots are disposed axially and circumferentially along the inner surface of the outer body or along the outer surface of the inner body. 
     
     
         7 . The tool of  claim 1 , wherein the inner body is axially movable relative to the outer body as the cam member moves along the slots. 
     
     
         8 . The tool of  claim 1 , wherein the inner body is rotatable relative to the outer body as the cam member moves along the slots. 
     
     
         9 . The tool of  claim 1 , further comprising a shear pin coupled to the inner body and the outer body to provide a minimum operating force prior to operation. 
     
     
         10 . The tool of  claim 1 , further comprising a collar coupled to the inner body for engagement with the outer body. 
     
     
         11 . A method of using a resettable circulation tool disposed in an abrasive jet drilling assembly, the method comprising:
 positioning a jetting drill device in the abrasive jet drilling assembly into contact with a portion of a wellbore;   applying a first axial force and a first rotational force on the abrasive jet drilling assembly, thereby causing a first port and a second port in the resettable circulation tool to align;   pumping fluid through the first and second ports of the resettable circulation tool;   applying a second axial force and a second rotational force on the abrasive jet drilling assembly, thereby causing the first port and the second port to misalign; and   pumping fluid through the resettable circulation tool and into the jetting drill device.   
     
     
         12 . The method of  claim 11 , further comprising moving a cam member along a first slot to move the first port and the second port into alignment. 
     
     
         13 . The method of  claim 12 , further comprising moving the cam member along a second slot to move the first port and the second port out of alignment. 
     
     
         14 . The method of  claim 13 , wherein the first slot has a length that is longer than a length of the second slot. 
     
     
         15 . The method of  claim 13 , wherein the first and second slots are disposed axially along an inner body or along an outer body of the resettable circulation tool, and wherein the cam is movable between the first and second slots by relative rotation between the inner body and the outer body. 
     
     
         16 . The method of  claim 13 , wherein the first and second slots are disposed axially and circumferentially along a body of the resettable circulation tool. 
     
     
         17 . The method of  claim 11 , further comprising pumping substantially all of the fluid through the resettable circulation tool and into the jetting drill device when the first and second ports are misaligned. 
     
     
         18 . The method of  claim 11 , further comprising pumping substantially all of the fluid through the first and second ports when aligned. 
     
     
         19 . The method of  claim 11 , further comprising shearing a shear pin of the resettable circulation tool to provide a minimum operating force prior to operation. 
     
     
         20 . The method of  claim 11 , further comprising draining fluid from the abrasive jet drilling assembly through the first and second ports when in alignment.