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The unallowable wellbore enlargement rate (20%-30%) is the severest problem of wellbore qualities in the job area of north of Hubei.

井径超标是鄂北工区井身质存在的最问题,一般都20%~30%,重影响成井质。

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conferree, conferrence, conferrer, conferva, confervoid, confess, confessant, confessed, confessedly, confesser,

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3G, 401(K), a,

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TED-Ed(视频版)

It starts out with a long vertical hole, known as a wellbore, drilled down through layers of sediment.

过程始一个深长的直孔洞,即井,透层层沉积物。

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configured-in, configured-off, configured-out, confine, confined, confinement, confines, confining, confiningbed, confirm,

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3G, 401(K), a,
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