Cone and plate fluidic oscillator inserts for use with a subterranean well

A well tool, comprising:

• a housing assembly;
• at least one fluidic oscillator insert received in the housing assembly, the fluidic oscillator insert having a fluidic oscillator formed on a first surface thereof, and the fluidic oscillator insert being at least partially secured in the housing assembly by engagement of conical second and third surfaces formed on the fluidic oscillator insert and the housing assembly, respectively;
• and
• a cover which closes off the first surface on the fluidic oscillator insert, wherein the fluidic oscillator comprises:
• a fluid input;
• first and second fluid outputs on opposite sides of a longitudinal axis of the fluidic oscillator, whereby a majority of fluid which flows through the fluidic oscillator exits the fluidic oscillator alternately via the first and second fluid outputs;
• and
• first and second fluid paths from the fluid input to the respective first and second fluid outputs, wherein the first and second fluid paths cross each other between the fluid input and the respective first and second fluid outputs, and wherein flow of the majority of fluid via the first fluid path draws fluid into the second fluid output.

A fluidic oscillator insert for use in a well tool, the insert comprising:

• a conical housing engagement surface;
• at least one fluidic oscillator formed on a substantially planar surface, wherein the fluidic oscillator produces oscillations in response to fluid flow through the fluidic oscillator, and wherein the fluidic oscillator comprises:
• a fluid input;
• first and second fluid outputs on opposite sides of a longitudinal axis of the fluidic oscillator, whereby a majority of fluid which flows through the fluidic oscillator exits the fluidic oscillator alternately via the first and second fluid outputs;
• and
• first and second fluid paths from the fluid input to the respective first and second fluid outputs, wherein the first and second fluid paths cross each other between the fluid input and the respective first and second fluid output, and wherein flow of the majority of fluid via the first fluid path draws fluid into the second fluid output.