US 12,392,200 B2
Fluid operated motor for running casing with bypass for pumping lost circulation material
Rafael Villa de Santana, Aberdeen (GB); and David Stephenson, Aberdeen (GB)
Assigned to Deep Casing Tools Limited, Aberdeenshire (GB)
Filed by Deep Casing Tools Limited, Aberdeenshire (GB)
Filed on Mar. 28, 2024, as Appl. No. 18/620,504.
Claims priority of application No. 2304509.9 (GB), filed on Mar. 28, 2023.
Prior Publication US 2024/0328260 A1, Oct. 3, 2024
Int. Cl. E21B 10/26 (2006.01); E21B 7/20 (2006.01); E21B 21/10 (2006.01)
CPC E21B 10/26 (2013.01) [E21B 7/208 (2013.01); E21B 21/103 (2013.01)] 16 Claims
OG exemplary drawing
 
4. A method for moving a tubular string along a well, comprising:
pumping fluid through a pipe string having a reaming tool attached to one end of the pipe string, the reaming tool comprising a housing having a connection at one end for coupling to a pipe string, the housing defining at least one of a rotor and a stator of a turbine, a rotor shaft rotatably supported on the housing, the rotor shaft defining the other of a stator and a rotor of the turbine, the rotor shaft defining an interior passage, the rotor shaft having a coupling at one end to attach a well intervention tool, a flow diverter disposed within the housing, the flow diverter comprising ports to selectively direct flow of fluid from an interior of the housing to either (i) an annular space between the housing and the rotor shaft, and (ii) the interior passage of the rotor shaft, wherein the flow diverter is operable to change direction of the flow of fluid by changing a flow rate of the flow of fluid;
wherein the pumping fluid is performed at a first rate to cause the fluid flow to be directed to the annular space such that the rotor shaft turns, and a reaming shoe attached to the coupling rotates;
moving the pipe string along the well while the pumping is performed at the first rate;
changing the rate of pumping fluid to a second rate so that the flow is directed to the interior passage of the rotor shaft;
adding lost circulation material to the fluid while pumping at the second rate, wherein the second rate is lower than the first rate.