发明名称 Tubular severing system and method of using same
摘要 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.
申请公布号 US8720565(B2) 申请公布日期 2014.05.13
申请号 US201113118289 申请日期 2011.05.27
申请人 SPRINGETT FRANK BENJAMIN;JOHNSON CHRISTOPHER DALE;PETERS SHERN EUGENE;ENSLEY ERIC TREVOR;NATIONAL OILWELL VARCO, L.P. 发明人 SPRINGETT FRANK BENJAMIN;JOHNSON CHRISTOPHER DALE;PETERS SHERN EUGENE;ENSLEY ERIC TREVOR
分类号 E21B29/00;E21B33/06 主分类号 E21B29/00
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