US 11,788,372 B2
Bottom hole assembly and methods for the utilization of pressurized gas as an energy source for severing subterranean tubulars
Gunnar Andersen, Mathopen (NO); Sam Noam Schroit, Houston, TX (US); and Jeffrey Bruce Wensrich, Houston, TX (US)
Assigned to Gas and Oil Technologies LLC, Al-Khobar (SA)
Filed by Gas and Oil Technologies LLC, Al-Khobar (SA)
Filed on Apr. 6, 2022, as Appl. No. 17/714,175.
Claims priority of application No. 20210512 (NO), filed on Apr. 27, 2021.
Prior Publication US 2022/0341272 A1, Oct. 27, 2022
Int. Cl. E21B 29/00 (2006.01); E21B 23/04 (2006.01)
CPC E21B 29/005 (2013.01) [E21B 23/04 (2013.01)] 16 Claims
OG exemplary drawing
 
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.