塞规,孔规,内径规,内量规
A differential pressure sticking was encountered at 2598 m under a circumstances of severe sloughing, and with enlarged hole gauge and dog-leg intervals during a pipe connection.
在井下严重垮塌、井径大、有S形井段的情况下,钻至2598m接单根时发生压差粘附卡钻。
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