Fluid operated motor for running casing with bypass for pumping lost circulation material

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.

A reaming tool for use in reaming a well, the reaming tool comprising:

• a housing (200) having a connection (202) 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 (208) rotatably supported on the housing (200), the rotor shaft defining the other of a stator and a rotor of the turbine, the rotor shaft defining an interior passage (211), the rotor shaft having a coupling at one end to attach a well intervention tool (48);
• a flow diverter (210) disposed within the housing (200), the flow diverter comprising ports to selectively change flow of fluid from an interior of the housing to either of
• (i) an annular space (212) between the housing (200) and the rotor shaft (208), and
• (ii) the interior passage (211) of the rotor shaft;
• wherein the flow diverter (210) is operable to change the flow of fluid by changing a flow rate of the flow of fluid;
• and
• a duck valve disposed in an hydraulic passage defined by the annular space, the duck valve arranged to block flow from the annular space to the interior of the housing, the duck valve arranged to open flow from the interior of the housing into the annular space.

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 performing the pumping at the second rate;
• and
• wherein the flow being directed to the interior passage of the rotor shaft comprises urging a valve shuttle in a valve body away from a valve seat in the valve body, the urging performed by a biasing device arranged to opposed force on the valve shuttle effected by the flow of fluid.

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;
• and
• causing the flow directed to the annular space to urge a duck valve to open flow in the annular space, the duck valve arranged to close flow from the annular space into the housing.