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2. Lesson 6C - Motion Compensation. Bumper SubsT = H - wdBuoyant RiserJackup Rig. . 3. Bumper Subs. Fit into the drill collar string, but do not have the ruggedness of drill collars. To obtain a reasonable operating life from bumper subs, action has to be taken on the following points
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1. 1 Petroleum Engineering 626Offshore DrillingLesson 6C Motion Compensation