发明名称 METHOD AND APPARATUS FOR FACILITATING ASSEMBLY AND ERECTION OF A DRILLING RIG
摘要 <p>Methods for connection parts of a mast of a drilling rig without using a crane or other lifting machine are disclosed. In certain aspects, these methods include moving parts of a mast to be assembled with trucks and positioning the parts with the trucks to facilitate their connection. This Abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).</p>
申请公布号 CA2907133(A1) 申请公布日期 2009.09.03
申请号 CA20092907133 申请日期 2009.01.14
申请人 NATIONAL OILWELL VARCO, L.P. 发明人 DONNALLY, ROBERT BENJAMIN;REN, CHUNQIAO;MCCURDY, STUART ARTHUR LYALL;LIU, XILIN;SHENG, HUI CHUN;YU, YAN
分类号 E21B7/02;E21B15/00 主分类号 E21B7/02
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