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] Before any workover, the well must first be . Since workovers are long planned in advance, there would be much time to plan the and so the reverse circulation would be common. The intense nature of this operation often requires no less than the capabilities of a . The workover begins by killing the well then removing the wellhead and possibly the flow line, then installing a B.O.P. commonly known as a , then lifting the fr.
[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.
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