(φ)139.5套管内全井下(φ)101.6套管延迟固井工艺技术
(φ)139.5투관내전정하(φ)101.6투관연지고정공예기술
Research and Application of (φ)101.6 Casing Delayed Cementing Technology in (φ)139.5 Casing
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