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Deep and Ultra-Deep Drilling Technique

Over 666 deep and ultra-deep wells with a depth more than 15,000 ft
Among, 56 wells more than 23,000 ft, accounting for 48% of ultra-deep wells in China.
Max. MD (KS-7): 26,316 ft.
Well RP301-5 with depth of 23,213 ft, drilling period 59.17 days.

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