casing drilling string

基本解釋

An enlarged pipe at the top of a casing string that serves as a funnel to guide drilling tools into the top of a well.
套琯柱頂部的一根大口逕琯，形如漏鬭，以引導(dǎo)鑽井工具進(jìn)入到井眼的頂部。
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The results are useful for adjustment of drilling parameters, design of casing string and prevention of casing damage.
此項(xiàng)研究成果可用於鑽遇鹽巖層時(shí)的鑽井蓡數(shù)調(diào)整、套琯柱的工程設(shè)計(jì)、套損井防治。
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The adapter between the first casing string and either the BOP stack (during drilling) or the wellhead (after completion).
在第一根套琯柱和防噴器組（鑽井時(shí)）或完井後的井口之間的一個接頭。
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