Bottom hole assembly - Wikipedia - Well bottom holes
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Initial bottom hole pressure measurements should be made, preferably at each well and at a selected “Key Gas Well” periodically. According to Woods and Abib,. A bottom hole assembly (BHA) is a component of a drilling rig. It is the lowest part of the drill slick with no stabilizers; a pendulum bottom-hole assembly for reducing the deviation of a well; packed with stabilizers for a straight hole / a short.