SUBSTRUCTURE OF A MOBILE DRILLING RIG WITH A MOVABLE CENTER FLOOR SECTION
摘要
<p>Disclosed herein is a raisable substructure of a drilling rig that includes first and second substructure boxes. The first and second substructure boxes of the raisable substructure each include, among other things an upper box and a lower box, wherein each of the upper boxes is adapted to be raised above a respective lower box. The disclosed raisable substructure also includes a movable center floor section that is adapted to be supported by the upper boxes of the first and second substructure boxes, wherein the movable center floor section is further adapted to be slidably moved between the upper boxes during assembly of the drilling rig.</p>
申请公布号
EP2841677(A2)
申请公布日期
2015.03.04
申请号
EP20130721492
申请日期
2013.04.24
申请人
NATIONAL OILWELL VARCO, L.P.;DONNALLY, ROBERT, BENJAMIN;REN, CHUNQIAO;LIU, XILIN