结合深水钻井的特点，考虑钻井施工的特殊要求，开发了深水双梯度钻井井身结构设计及优化程序。
And considering the features and particular requirements of deepwater drilling, a program for deepwater DGD well casing program design and optimization is developed.
双梯度钻井又称为双密度钻井，是一种适用于深水钻井的新型钻井技术。
Dual Gradient drilling (DGD) is also known as Dual Density drilling, which is a new type of drilling technology for deepwater drilling.
双梯度钻井为深水钻井井身结构设计提供了一种新的优化方法，具有显著的经济效益和工业实用价值。
Therefore, DGD may provide an alternative optimization method for deepwater well casing program design, which can produce remarkable economic and industrial values.
双梯度钻井又称为双密度钻井，是一种适用于深水钻井的新型钻井技术。
Several new approaches to the deepwater dual gradient drilling were developed, including subsea mudlift drilling, riserless drilling, and dual density drilling.
双梯度钻井又称为双密度钻井，是一种适用于深水钻井的新型钻井技术。
Several new approaches to the deepwater dual gradient drilling were developed, including subsea mudlift drilling, riserless drilling, and dual density drilling.
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