The drawworks reels in and reels out the drilling line. The drilling line is connected to the traveling block and hook which connect to the drill string. The drill string runs over the crown block and setup like a block and tackle pulley system.
[pdf] China's land-based oil resources are mostly concentrated in the country's north. Large oil fields include , , , , and Dagang. China's proven oil reserves per capita are low. Province started producing in 1960, and by 1963 was producing nearly 2.3 million tons of oil. Production from Daqing declined, but in 1965, in Sh. In recent years, Chinese-manufactured oil rigs have earned a strong reputation in global markets due to their advanced technology, cost-efficiency, and comprehensive service support, especially for land drilling projects.
[pdf] A derrick is a composed at minimum of one , as in a , which may be articulated over a load by adjusting its . Most derricks have at least two components, either a guyed mast or self-supporting , and a boom hinged at its base to provide articulation, as in a stiffleg derrick. The most basic type of derrick is controlled by three or four lines connected to the t.
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