Inner upsetting technology for thin wall drilling pipes was used in Series SQ high strength wire linedrilling pipes.
研究开发成功的SQ系列高强度绳索取心钻杆首次采用了薄壁钻杆内镦粗技术。
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To raise wire-linedrilling efficiency need to: 1. Select casing diameter and depth according to drilling depth, diameter, strata drilled and rock integrity, structure features, weathered layer depth;
The bottom line Eager to resume drilling in the Gulf, oil companies are distancing themselves from BP and painting its safety practices as substandard.