发明名称 Deep draft drilling platform
摘要 A deep draft oil well drilling platform having a large hollow body is shaped, designed, and ballasted to have a substantial portion thereof submerged under the surface of the ocean a sufficient distance to be substantially unaffected by surface waves and weather. The body contains an oil well drilling rig and all supplies, equipment, and materials normally necessary to drill an oil well, with such rig, equipment, and the like positioned well below the surface of the water.
申请公布号 US4502551(A) 申请公布日期 1985.03.05
申请号 US19820364491 申请日期 1982.04.01
申请人 RULE, KENNETH C.;MICHAEL, FRANK W. 发明人 RULE, KENNETH C.;MICHAEL, FRANK W.
分类号 E21B7/128;E21B7/132;(IPC1-7):E21B7/124 主分类号 E21B7/128
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