US 12,078,064 B2
Directional drilling systems
Jeremy Cochain, Stonehouse (GB); Robert Sedgeman, Highnam (GB); Andreas Michaelides, Cheltenham (GB); and Denis Li, Houston, TX (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 17/995,493
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Apr. 6, 2020, PCT No. PCT/US2020/026852
§ 371(c)(1), (2) Date Oct. 5, 2022,
PCT Pub. No. WO2021/206677, PCT Pub. Date Oct. 14, 2021.
Prior Publication US 2023/0175321 A1, Jun. 8, 2023
Int. Cl. E21B 7/06 (2006.01); E21B 17/10 (2006.01)
CPC E21B 7/06 (2013.01) [E21B 17/1014 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A directional drilling assembly to aid steering of a bit, comprising:
a piston support comprising a first opening, a second opening located uphole of the first opening, a longitudinal axis, and an outer surface including a leading edge and a trailing edge, wherein the leading edge terminates at a first point, the trailing edge terminates at a second point, and the longitudinal axis passes through the first point, the second point, the first opening, and the second opening;
a first piston disposed in the first opening and comprising a first piston area, wherein the first piston is extendible transversely to the longitudinal axis to steer the bit; and
a second piston disposed in the second opening and comprising a second piston area, wherein the second piston is extendible transversely to the longitudinal axis to steer the bit, and wherein the first piston area is smaller than the second piston area.