... What is the BHA of this well？这口井的下部钻具如何组合？ Drill out cement.钻穿水泥 Drill out 20“casing shoe.钻穿20”套管鞋 ...
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Drill out cement.
钻穿水泥。
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Many reasons like out sand, deposition of case dirty, falling things and cement injection can cause the drill pipe sticking and the well abandoned.
因出砂、套管垢沉积、落物、注灰等原因常造成钻杆卡钻，导致油水井报废。
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