CPC E21B 29/005 (2013.01) [E21B 23/04 (2013.01)] | 16 Claims |
1. A bottom hole assembly for cutting a pipe within a borehole that extends into a subterranean formation, wherein the bottom hole assembly comprises a holding tool for securing the bottom hole assembly to the pipe; and wherein the bottom hole assembly further comprises a cutting tool, and wherein the cutting tool comprises:
a pressure chamber;
a propellant;
an igniter configured to ignite the propellant;
a gas-driven rotatable motor comprising one or more fluid passages wherein each of the fluid passages are in fluid communication with an exterior of the bottom hole assembly;
a mechanical cutting head coupled to the to the gas-driven rotatable motor;
wherein the cutting tool is configured such that upon ignition of the propellant, a pressurized gas is developed in the pressure chamber which is received by the gas-driven rotatable motor, wherein the gas-driven rotatable motor is configured to generate a thrust rotating the motor by exhausting the pressurized gas from the pressure chamber via the one or more fluid passages in the gas-driven rotatable motor to the exterior of the bottom hole assembly.
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