发明名称 TUBULAR SEVERING SYSTEM AND METHOD OF USING SAME
摘要 <p>A method for severing a tubular of a wellbore is provided. The method involves positioning a blowout preventer about a tubular, the blowout preventer having a plurality of rams slidably positionable therein and a plurality of blades carried by the rams for engaging the tubular. The method further involves piercing the tubular with a piercing point of at least one of the blades such that a portion of the tubular is dislodged therefrom, and raking through the tubular with a cutting surface of at least one of the blades.</p>
申请公布号 CA2801800(C) 申请公布日期 2015.04.28
申请号 CA20112801800 申请日期 2011.05.27
申请人 NATIONAL OILWELL VARCO, L.P. 发明人 SPRINGETT, FRANK BENJAMIN;ENSLEY, ERIC TREVOR;JOHNSON, CHRISTOPHER DALE;PETERS, SHERN EUGENE
分类号 E21B29/08 主分类号 E21B29/08
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