Taking the purchase of a deepwater self-elevating drilling rig as an example, a synthetic probability model is set up to carry out the economic risk assessment.

以某海洋钻井公司购置自升式深水钻井平台为例，建立了海洋平台购置项目经济风险评估的综合概率模型。

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8 the rig is suitable for various drilling methods such as carbide bit drilling, auger drilling, DTH hammer drilling, follow - up casing drilling, etc. 3.

钻机可适用多种钻进工艺方法，如合金回转钻进螺旋钻进潜孔锤钻进跟管钻进等。

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Last year, the rental cost of a jack-up drilling rig went up 66%.

BBC: Buzzard platform in the North Sea

It required that as soon as Davy Jones was perforated and a flare came up the hole, the rig had to be backed away from the drilling platform.

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