Flow-through pulsing assembly for use in downhole operations

A method of operating a downhole assembly, wherein the downhole assembly comprises:

• a motor comprising a rotor and a stator;
• a rotary component and a stationary component for generating fluid pressure pulses, the rotary component and stationary component each comprising at least one respective port, the rotary component being drivable by the rotor;
• the rotary component, stationary component, and rotor each comprising a bore defining a substantially continuous passage permitting a substantially axial first route for fluid flow through the assembly, the at least one port of the rotary component substantially aligned with the bore of the rotary component and the at least one port of the stationary component substantially aligned with the bore of the stationary component;
• the motor and the ports of the rotary component and stationary component providing a passage permitting a substantially axial second route for fluid flow through the assembly, wherein fluid passing through the assembly along the second route does not flow through the bore of the rotary component or the bore of the stationary component, wherein the passage through the motor is between the rotor and the stator,
• the method comprising:
• causing fluid to flow into the downhole assembly through the first and second routes to thereby drive the rotary component at a first rotational speed;
• diverting at least some fluid flowing through the first route to the second route using a blocking implement to thereby drive the rotary component at a second rotational speed.

An assembly for use in a downhole string, the assembly comprising:

• a motor comprising a rotor and a stator;
• a rotary component and a stationary component for generating fluid pressure pulses, the rotary component and stationary component each comprising at least one respective port;
• the rotary component, stationary component, and rotor each comprising a bore defining a substantially continuous passage permitting a substantially axial first route for fluid flow through the assembly;
• the motor and the ports of the rotary component and stationary component providing a passage permitting a second route for fluid flow through the assembly, wherein fluid passing through the assembly along the second route does not flow through the bore of the rotary component or the bore of the stationary component, wherein the passage through the motor is between the rotor and the stator, the rotary component being drivable by the rotor such that the at least one port of the rotary component enters into and out of alignment with the at least one port of the stationary component to thereby cause pulsing in fluid flowing in the second route in a direction substantially parallel to the axial first route;
• wherein when fluid flows in the assembly through both the first and second routes, the rotary component is driven at a first rotational speed;
• wherein when at least some of the fluid is diverted from the first route to the second route by a blockage disposed in the first route, the rotary component is driven at a second rotational speed.