The two technical problems faced by the technology of under-balanced horizontal well drilling with gas injection are the down-hole motor and the conventional MWD can't work normally.
注气欠平衡钻水平井技术面临的两大技术难题是井下动力钻具不能正常工作和常规MWD无法正常工作。
On the basis of our practical design features and in comparison with similar products of foreign countries, the principles for selecting the down-hole motor parameters are also discussed.
根据实际设计经验，并与国外同类产品相比较，探讨了单波齿螺杆马达参数选择的原则。
The merits of down-hole motor drilling in both rotary and sliding modes are described. Some important drilling technologies in the 21st century, including high pressure and high temperature (HPH…
分析表明，高压高温钻井、深井超深井钻井、特殊工艺钻井及三维可控与可视化钻井技术将是2 1世纪最重要的和最具发展前景的钻井技术系列。
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