US 12,435,573 B2
Push the bit rotary steerable system
Richard Hutton, Bristol (GB)
Assigned to D-Tech (UK) Ltd, Bristol (GB)
Filed by D-TECH (UK) LTD, Bristol (GB)
Filed on Oct. 14, 2024, as Appl. No. 18/915,084.
Application 18/915,084 is a continuation of application No. 18/303,753, filed on Apr. 20, 2023, granted, now 12,116,894.
Application 18/303,753 is a continuation of application No. 17/341,109, filed on Jun. 7, 2021, granted, now 11,649,680, issued on May 16, 2023.
Application 17/341,109 is a continuation of application No. 15/999,107, granted, now 11,028,645, issued on Jun. 8, 2021, previously published as PCT/IB2017/000233, filed on Feb. 20, 2017.
Application 15/999,107 is a continuation of application No. 15/046,963, filed on Feb. 18, 2016, granted, now 9,624,727, issued on Apr. 18, 2017.
Prior Publication US 2025/0215749 A1, Jul. 3, 2025
Int. Cl. E21B 7/06 (2006.01); E21B 3/00 (2006.01); E21B 47/022 (2012.01); E21B 47/024 (2006.01)
CPC E21B 7/067 (2013.01) [E21B 3/00 (2013.01); E21B 7/06 (2013.01); E21B 7/062 (2013.01); E21B 47/022 (2013.01); E21B 47/024 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A push the bit rotary steerable system, comprising:
a drill collar comprising a cavity;
a stabilizer coupled to the drill collar and having multiple blades;
a rotary bit pushing device comprising:
a body coupled to the drill collar, the rotary bit pushing device comprising a plurality of deflection devices spaced circumferentially around a longitudinal axis extending through the body, each deflection device being movable between a normal position and an extended position in which the deflection device is farther from the longitudinal axis than when the deflection device is in the normal position, the body comprising a first channel; and
a flow regulator coupled to the body and controllable to direct fluid to the first channel through which the fluid can flow toward a first deflection device of the plurality of deflection devices;
wherein:
the flow regulator has a first passage rotatable to a first position in which the first passage is in fluid communication with the first channel; and
the first deflection device is movable from the normal position to the extended position after: (i) the first passage has moved to the first position from another position and (ii) the fluid has flowed through the first passage and through the first channel toward the first deflection device.