Patent ID: 6029745
Filing Date: 2000-02-29
Classification: E21B

Abstract:
A system for cutting wellbore casing, the system comprisingengaging apparatus for releasably holding a wellbore device,casing cutting apparatus interconnected with and below the engaging apparatus for cutting casing in a wellbore, the wellbore device connected to the casing,locking apparatus for selectively and releasably locking the engaging apparatus holding the wellbore device,a fluid relief device positioned above the casing cutting apparatus in a string including the casing cutting apparatus, the engaging apparatus, and the fluid relief device, the fluid relief device having at least one exhaust port therethrough, anda portion of fluid pumped from pumping apparatus at an earth surface into a wellbore in which the system is disposed flowable through the fluid relief device to the casing cutter for operation thereof and an exhaust portion of the fluid exhausting through the at least one exhaust port so that the exhaust portion does not flow through the casing cutter.