B - Operations – Transporting – 26 – D
Patent
B - Operations, Transporting
26
D
164/16
B26D 5/00 (2006.01)
Patent
CA 1170163
APPARATUS FOR CHEMICAL CUTTING ABSTRACT OF THE DISCLOSURE A method and apparatus for cutting tubing suspended in a borehole. An elongated tubular assembly is provided for suspension in and securement within a wellbore for the chemical cutting of the tubing therein through the discharge of high velocity streams of a highly reactive, incendiary chemical fluid. The apparatus includes the storage of a halogen flouride, or the like, disposed within a chemical module inter- mediately disposed of propellant and slip assembly modules and a discharge head assembly. The propellant module is constructed with a chamber containing active burning ignition powder for igniting a slow burning propellant for the generation of gas to pressurize the chamber and cause a linear actuation of the slip assembly responsive thereto for the deployment of a cylindrically segmented slip array to securely engage the adjacent tubing and anchor the apparatus therein. The generation of the pressurizing gas also imparts a movement of the in- cendiary fluid through a catalyst chamber for causing the fluid to react and discharge through the discharge head assembly for the cutting of the adjacent tubing. The slip assembly is constructed with a dual taper, gripping teeth configuration for matingly engaging two discrete tubing dia- meters, therein facilitating interchangeable use within conduit of different sizes. The assembly also includes a pair of rupture diaphragms enclosing the incendiary fluid, which rupture to a substantially full flow opening at a preselected breakthrough pressure to facilitate effective and safe oper- ation of the present invention.
408332
Gearhart-Owen Industries Inc.
Gowling Lafleur Henderson Llp
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