Patent ID: 11879335
Assignee: CANOPUS DRILLING SOLUTIONS HOLDING B.V.
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 23:
24. An abrasive particle pulse generator for use in a directional drilling system, configured to cause a variation of a concentration of abrasive particles along stream portions of a stream of abrasive particles mixed with drilling fluid to be passed through one or more abrasive nozzles of the system, the pulse generator comprising:
a first channel having a first flow resistance to the drilling fluid mixed with abrasive particles, a first inlet, and a first outlet,
a second channel arranged in parallel to the first channel, having a second flow resistance to the drilling fluid mixed with abrasive particles, a second inlet, and a second outlet,
a particle deflection device, arranged at a location along the stream directly upstream of the first and second inlets, comprising one or more actuators connected to a control unit,, wherein the particle deflection device is configured to periodically,
during a first time period, deflect a first majority of all abrasive particles of the stream passing said location into the first inlet, and
during a second time period following the first time period, deflect a second majority of all abrasive particles in the stream passing said location into the second inlet,, wherein the first and second channel are embodied such that a difference between the first flow resistance and the second flow resistance results in a velocity difference between said first majority of abrasive particles passing through said first channel and said second majority of abrasive particles passing through said second channel,, wherein the velocity difference is such that in a combination section downstream of the first and second outlets, the first and second majority, together with any of said drilling fluid passed into the first and second inlet during the first and second time period, respectively, are combined into one of said stream portions, and minorities of abrasive particles not being deflected, together with any drilling fluid passed into the first and second channel during the second and first time period, respectively, are combined into a subsequent one of said stream portions.