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Tangible Drilling Costs (TDC) are expenses associated with the physical aspects of drilling for oil and naturalgas. These costs are directly related to the actual drilling operations and typically represent a significant portion of the overall expenses in oil and gas exploration and production.
Draw works It have a drum on which drilling line is reel in and out to move travelling block inside mast or derrick for raising and lowering drilling string. How Drilling rig Systems Work-Complete Guide Buy Now Crown Block Crown block is top most part of mast or derrick. It have number of sheaves on it.
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