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Factors affecting the shearing strength of cemented casing are investigated.
考察了粘砂套管剪切强度的影响因素。
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Then a few more hundred feet is drilled with a narrower drill bit and then the narrower casing is run and cemented in.
FORBES: The Fracking Solution Is A Good Cement Job
The first wider casing is run and then cemented in.
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