Separable tool with mill face, method and system

Abstract

A separable tool including a mill section, a mill face disposed on the mill section and having a bore therethrough that is offset from a longitudinal axis of the mill section, a tool adapter section, and a release configuration releasably securing the mill section to the tool adapter section with the mill face disposed between the mill section and the tool adapter section. A method for operating a wellbore system including in a single run, setting a plug in the wellbore system, releasing the plug, pumping cement, dressing the cement, and testing the cement.

What is claimed is: 
     
         1 . A separable tool comprising:
 a mill section;   a mill face disposed on the mill section and having a bore therethrough that is offset from a longitudinal axis of the mill section;   a tool adapter section; and   a release configuration releasably securing the mill section to the tool adapter section with the mill face disposed between the mill section and the tool adapter section.   
     
     
         2 . The tool as claimed in  claim 1  wherein the mill face comprises a plurality of cutters of differing geometry or dimension. 
     
     
         3 . The tool as claimed in  claim 2  wherein the cutters define junk slots. 
     
     
         4 . The tool as claimed in  claim 3  wherein the junk slots extend longitudinally along a peripheral surface of the mill section. 
     
     
         5 . The tool as claimed in  claim 1  wherein the bore includes an object seat. 
     
     
         6 . The tool as claimed in  claim 1  wherein the release configuration is a shear member. 
     
     
         7 . The tool as claimed in  claim 1  further including one or more of a plug, a casing cutter, a casing spear, a pulling tool, a casing anchor, packoffs and casing sealing tools, a punch and wash tool, a perf and wash tool, and valves associated with any of these, and combinations of tools including any of the foregoing. 
     
     
         8 . A method for operating a wellbore system comprising:
 in a single run, setting a plug in the wellbore system;   releasing the plug;   pumping cement;   dressing the cement; and   testing the cement.   
     
     
         9 . The method as claimed in  claim 8  wherein the releasing the plug is by hydraulic pressure or by overpull. 
     
     
         10 . The method as claimed in  claim 9  wherein releasing also includes spacing of components of a BHA of which the plug was a part. 
     
     
         11 . The method as claimed in  claim 10  wherein the pumping includes filling of a space left by the spacing. 
     
     
         12 . The method as claimed in  claim 8  further comprising tagging the cement prior to and after dressing the cement. 
     
     
         13 . The method as claimed in  claim 8  wherein the testing is setting down weight on the cement. 
     
     
         14 . The method as claimed in  claim 8  further comprising operating one or more of a casing cutter, a casing spear, a pulling tool, a casing anchor, packoffs and casing sealing tools, a punch and wash tool, a perf and wash tool, and valves associated with any of these, and combinations of tools including any of the foregoing. 
     
     
         15 . The method as claimed in  claim 8  including deploying a separable tool comprising:
 a mill section; 
 a mill face disposed on the mill section and having a bore therethrough that is offset from a longitudinal axis of the mill section; 
 a tool adapter section; and 
 a release configuration releasably securing the mill section to the tool adapter section with the mill face disposed between the mill section and the tool adapter section. 
 
     
     
         16 . A wellbore system comprising:
 a borehole in a subsurface formation;   a string in the borehole;   a separable tool as claimed in  claim 1  disposed in or as a part of the string.