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Directional drilling
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=== Trajectory Control === * [[Bottom hole assembly|Bottom Hole Assembly (BHA)]]: The configuration of drilling equipment near the drill bit (BHA) profoundly influences drilling direction. BHAs can be tailored to promote straight drilling or induce deviations. * [[Mud motor|Downhole Motors]]: Specialized mud motors rotate only the drill bit, allowing controlled changes in direction while the majority of the [[drill string]] remains stationary. * [[Rotary steerable system|Rotary Steerable Systems (RSS)]]: Advanced RSS technology enables steering even while the entire drill string is rotating, ensuring greater efficiency and control.
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