Magnetic pulse actuation arrangement having a reluctance reduction configuration and method

Abstract

A magnetic pulse actuation arrangement including an inductor, a workpiece spaced from the inductor, a reluctance reduction configuration in magnetically operable communication with the inductor and the workpiece. Also included is a method for completing a borehole including running an arrangement as in any prior embodiment into the borehole, configuring the arrangement to reduce reluctance, generating a magnetic pulse, and moving a workpiece.

What is claimed is: 
     
         1 . A magnetic pulse actuation arrangement comprising:
 an inductor;   a workpiece spaced from the inductor;   a reluctance reduction configuration in magnetically operable communication with the inductor and the workpiece.   
     
     
         2 . The arrangement as claimed in  claim 1  wherein the configuration is a magnetically permeable fluid. 
     
     
         3 . The arrangement as claimed in  claim 2  wherein the fluid is a liquid. 
     
     
         4 . The arrangement as claimed in  claim 2  wherein the fluid is a magnetorheological fluid. 
     
     
         5 . The arrangement as claimed in  claim 2  wherein the fluid has a relative magnetic permeability greater than 1. 
     
     
         6 . The arrangement as claimed in  claim 2  wherein the fluid is maintained within the arrangement. 
     
     
         7 . The arrangement as claimed in  claim 2  wherein the fluid is pumped in the form of a pill to the arrangement. 
     
     
         8 . The arrangement as claimed in  claim 2  wherein the fluid is stored proximate a target location and supplied to the arrangement. 
     
     
         9 . The arrangement as claimed in  claim 1  wherein the configuration is a magnetically permeable solid. 
     
     
         10 . The arrangement as claimed in  claim 9  wherein the solid is a ring. 
     
     
         11 . The arrangement as claimed in  claim 1  wherein the arrangement includes a cone interactive with the configuration. 
     
     
         12 . A method for completing a borehole comprising:
 running an arrangement as claimed in  claim 1  into the borehole;   configuring the arrangement to reduce reluctance;   generating a magnetic pulse; and   moving a workpiece.   
     
     
         13 . The method as claimed in  claim 12  wherein the generating includes saturating a magnetic field between the inductor and the workpiece. 
     
     
         14 . The method as claimed in  claim 12  wherein the configuring includes carrying a magnetically permeable fluid with the arrangement. 
     
     
         15 . The method as claimed in  claim 12  wherein the configuring includes supplying a magnetically permeable fluid to the arrangement in the borehole. 
     
     
         16 . The method as claimed in  claim 12  wherein the configuring includes storing a magnetically permeable fluid near a target area and supplying the magnetically permeable fluid to the arrangement. 
     
     
         17 . The method as claimed in  claim 12  wherein the configuring is shifting a reluctance reduction configuration.