Downhole milling machine and method of use

Details Downhole milling machine and method of use Downhole milling machine and method of use

2008-05-20

2008-05-20

Dang, Hoang (Department: 3672)

Wells

Processes

Preventing flow into strainer while lowering by blocking...

C166S055700

Reexamination Certificate

active

07373983

ABSTRACT:
The present invention is directed to a method and apparatus for providing a pathway for fluid communication through a tubing-retrievable subsurface safety valve (TRSSV). The method and apparatus are designed to be deployed within a hydrocarbon wellbore after the TRSSV has failed. The apparatus is a milling tool that is run into the wellbore and landed within the TRSSV. The milling tool comprises a housing system, a cutting system, a drive system, and an actuating system. In operation, the milling tool is landed within the housing of the TRSSV. Thereafter, the actuating system is initiated. The actuating system actuates the drive system, which in turn drives the cutting system. In one arrangement, the cutting system includes blades for shaving the pressure containing body of the TRSSV, thereby forming a pathway for fluid communication between a hydraulic fluid line and a bore of the safety valve.

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