Down-hole tool hydraulic force intensifier

Abstract

A down-hole tool hydraulic force intensifier is disclosed utilizing an intensifier piston having an enlarged fluid facing top surface for receipt of hydraulic pressure thereon to force such intensifier piston against the activating structure of the down-hole tool to effectively increase the hydraulic force thereon.

I claim:  
     
         1 . A hydraulic force intensifier for use with a down-hole tool having activating means and a bottom, comprising: 
 an intensifier piston having an enlarged fluid facing top surface, a narrow piston body and a relatively narrower throughbore defined longitudinally therein;    a sub having an aperture defined therein for slideable receipt of said piston body and enlarged fluid facing top surface of said intensifier piston, said sub including means for attachment to said down-hole tool at the bottom thereof;    means for attachment to a source of hydraulic pressured fluid; and    said enlarged fluid facing top surface adapted to receive said hydraulic fluid pressure over a wider surface area than would otherwise be received by said tool for increasing the force of said intensifier piston body on said activating means of said tool.    
     
     
         2 . The force intensifier of  claim 1  further including: 
 a plurality of said intensifier pistons aligned in series to receive said hydraulic fluid pressure against the enlarged fluid facing top surfaces of each of said intensifier pistons for effectively increasing the pressure on said activating means of said down-hole tool.