入井，读音是rù jǐng，侵入井宿所在的区域。指触犯刑法。
记录好所有（入井工具）内外径。
化学推进剂被装在工具内，工具用钢丝绳下入井内。
The chemical propellant is packed inside the tool which is lowered on wireline.
入井前，带班队长或司钻要用合适的测量规核实扶正器、扩眼器、钻头，确保尺寸合适。
The Toolpusher or Senior Driller shall verify all stabilisers, reamers and bits will be gauged with appropriate ring gauge to ensure proper size before running in the hole.
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