US 11,753,871 B2
Rotary steerable system for wellbore drilling
Lizheng Zhang, Humble, TX (US); and Wei Zhang, Humble, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Dec. 3, 2021, as Appl. No. 17/542,030.
Claims priority of provisional application 63/153,113, filed on Feb. 24, 2021.
Prior Publication US 2022/0268102 A1, Aug. 25, 2022
Int. Cl. E21B 7/06 (2006.01)
CPC E21B 7/064 (2013.01) [E21B 7/068 (2013.01); E21B 7/061 (2013.01)] 20 Claims
OG exemplary drawing
 
9. A method comprising:
receiving, at a rotary steerable system, pressure from upstream with respect to the rotary steerable system;
directing, by the rotary steerable system, the pressure to an actuation cylinder of the rotary steerable system, the actuation cylinder sealed by a radial seal that is positioned in a groove and between the actuation cylinder and a steering collar of the rotary steerable system, wherein the groove is positioned in the steering collar or in the actuation cylinder, the radial seal stationary with respect to movement of a piston positioned in the actuation cylinder, wherein the piston is slidably coupled to the actuation cylinder and to a steering pad of the rotary steerable system for actuating the steering pad, the piston comprising an orifice to allow a mud jet to be ejected from the orifice in response to the actuation cylinder actuating, the piston positioned in the actuation cylinder to define a gap between the piston and the actuation cylinder to facilitate flow of wellbore fluid, wherein the rotary steerable system includes:
a mud inlet line that is positioned from an upstream location and the actuation cylinder; and
a piston hanger positioned in the piston and adjacent at least to the steering pad for transferring pressure from the piston to the steering pad, the piston hanger including a grooved surface; and
applying, by the rotary steerable system, a steering force to a wall of a wellbore for altering a drilling direction of the rotary steerable system in the wellbore.