US 12,123,265 B2
Directional core drilling system
Zach Thomas, Houston, TX (US); Kai Penzhorn, Houston, TX (US); and Brian Smith, The Woodlands, TX (US)
Assigned to INTERNATIONAL DIRECTIONAL SERVICES LLC, Chandler, AZ (US)
Filed by International Directional Services LLC, Chandler, AZ (US)
Filed on Apr. 29, 2022, as Appl. No. 17/733,669.
Claims priority of provisional application 63/242,578, filed on Sep. 10, 2021.
Prior Publication US 2023/0082691 A1, Mar. 16, 2023
Int. Cl. E21B 17/046 (2006.01); E21B 4/02 (2006.01); E21B 7/06 (2006.01); E21B 10/02 (2006.01)
CPC E21B 17/0465 (2020.05) [E21B 4/02 (2013.01); E21B 7/062 (2013.01); E21B 10/02 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A directional core drilling assembly comprising:
an outer barrel assembly including at least one steering pad for orientating a drill bit within a hole;
a drive barrel rotationally supported within the outer barrel assembly, the drill bit attached to a downhole end of the drive barrel;
an inner drive assembly receivable within the outer barrel assembly, the inner drive assembly including a torque latch assembly and an anti-rotation bearing assembly, the torque latch assembly including latch arms configured to releasably couple a rotational drive input to the drive barrel; and
a core barrel coupled to the anti-rotation bearing assembly and movable into a position within the drive barrel, wherein the core barrel is rotationally fixed relative to the drive barrel;
a motor generating a rotational torque in response to a fluid flow; and
a metering ring disposed in the outer barrel proximate the motor defines a fluid passage for exhausting fluid flow from the motor.