Section milling tool, methods and system

Abstract

A section milling tool includes an electrically operated section mill configured to mill without conveying swarf to surface, an electric motor operably connected to the section mill, an electric stroker operably connected to the motor, and an electric anchor operably connected to the stroker. A method for section milling a downhole structure without conveying swarf to surface includes running a bottom hole assembly (BHA) on a wireline, deploying an anchor, rotating a section mill, and stroking the section mill with a stroker. A method for reducing emissions during a section milling operation includes running a tool on wireline, and milling a tubular structure in the borehole. A method for plugging and abandonment of a well includes running a tool on wireline, milling a tubular structure in the borehole, and plugging the well at the milled tubular structure.

What is claimed is: 
     
         1 . A section milling tool, comprising:
 an electrically operated section mill configured to mill without conveying swarf to surface, during use;   an electric motor operably connected to the section mill;   an electric stroker operably connected to the motor; and   an electric anchor operably connected to the stroker.   
     
     
         2 . The tool as claimed in  claim 1 , further comprising a wireline interface operably connected to the anchor. 
     
     
         3 . The tool as claimed in  claim 1 , wherein the anchor inhibits both longitudinal and rotational movement, when set. 
     
     
         4 . The tool as claimed in  claim 1 , wherein the stroker pulls the mill toward the anchor, when in use. 
     
     
         5 . The tool as claimed in  claim 1 , wherein the mill is configured to jettison swarf in a downhole direction of the mill while cutting in an uphole direction, during use. 
     
     
         6 . A method for section milling a downhole structure without conveying swarf to surface, comprising:
 running a bottom hole assembly (BHA) on a wireline;   deploying an anchor to prevent both longitudinal and rotational movement of the BHA relative to the wireline and the structure;   rotating a section mill and milling a tubular structure; and   stroking the section mill with a stroker.   
     
     
         7 . The method as claimed in  claim 6 , wherein the deploying is electrically deploying. 
     
     
         8 . The method as claimed in  claim 6 , wherein the rotating is electrically rotating against the anchor. 
     
     
         9 . The method as claimed in  claim 6 , wherein the milling includes jettisoning swarf from the milling in a downhole direction relative to the mill. 
     
     
         10 . The method as claimed in  claim 6 , wherein the stroking is moving the mill toward the anchor and in an uphole direction. 
     
     
         11 . The method as claimed in  claim 6 , wherein the stroking is electrical stroking. 
     
     
         12 . The method as claimed in  claim 6 , further including releasing the anchor. 
     
     
         13 . The method as claimed in  claim 6 , further including moving the BHA, resetting the stroker and the anchor, and milling an additional section of tubular structure. 
     
     
         14 . A method for reducing emissions during a section milling operation, comprising:
 running a tool as claimed in  claim 1  into a borehole on wireline and without a rig; and   milling a tubular structure in the borehole.   
     
     
         15 . A method for plugging and abandonment of a well, comprising:
 running a tool as claimed in  claim 1  into a borehole on wireline and without a rig;   milling a tubular structure in the borehole; and   plugging the well at the milled tubular structure.   
     
     
         16 . A borehole system comprising:
 a borehole in a subsurface formation;   a tubular structure in the borehole; and   a tool as claimed in  claim 1  disposed within the tubular structure.