US 12,442,292 B1
Pulse generation of viscous fluids with a mud motor
Koustubh Kumbhar, Houston, TX (US); and Harley Wayne Jones, II, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on May 31, 2024, as Appl. No. 18/679,569.
Int. Cl. E21B 47/24 (2012.01); E21B 33/13 (2006.01)
CPC E21B 47/24 (2020.05) [E21B 33/13 (2013.01)] 20 Claims
OG exemplary drawing
 
10. A method, comprising:
introducing a downhole tool assembly into a wellbore extending into a subterranean formation;
discharging a fluid into the target interval of the wellbore with the downhole tool assembly, the downhole tool assembly comprising:
a rotary shaft in mechanical communication with a rotary mechanism and a rotary disc attached to the rotary shaft, wherein the rotary shaft defines a first flow path for a first stream of the fluid in an inner conduit of the rotary shaft and a second flow path for a second stream of the fluid radially disposed around the rotary shaft;
blocking a flow of the second stream of fluid along the second flow path when a window of the rotary disc is not aligned with a corresponding window of the downhole tool assembly; and
pulsing the fluid as it is being discharged, wherein a periodicity of the pulsing is based on a rotation rate of the rotary mechanism and a pressure drop of the first stream of the fluid through the rotary shaft.