Classified by HDD Machine model, among the new drilling rigs, there are 79 super-large drilling rigs (with a pullback force greater than 100t) of 79 units, and 166 large-sized drilling rigs (with a pullback force of 51-100t). There are 1118 rigs (pullback force 26-50t), accounting for 52.2% of the total. Small rigs (pullback force less than 25t) total 778, accounting for 36.3%, of which 27 mini-rigs (pullback force less than 10t).
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