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随着竖井凿井机械化程度的不断提高,原有四种型号的井架越来越不适应要求。虽然国内一些凿井机械化试点单位,对原标准井架采取了不同的措施,但都未能从根本上解决问题:混凝土用量较大、装车道积水、过卷高度和井架承载能力不相协调。特别是随着凿井机械化程度的不断提高,新的大型设备不断出现,重型钻机,中心双臂回转抓
With the increasing degree of mechanization of shaft sinking, the original four types of derricks more and more not meet the requirements. Although some domestic drilling mechanized pilot units took different measures to the original standard derrick, they all failed to solve the problem fundamentally: large quantities of concrete, stagnant water in loading lanes, uncoordinated rolling height and derrick load capacity. Especially with the increasing degree of mechanization of sinking, new large-scale equipment continues to emerge, heavy-duty rig, the center arm swing catch