P2) The power of a rig drawworks is 300 hp, knowing that 10 lines are strung between the crown block and travelling block; calculate a) The maximum hook horse power, b) The hook velocity, when the fast line has a velocity 14.22 ft/s, c) The maximum real weight of the drill string which can be pulled out of the hole in a velocity of 3.5 in/s, if the drilling fluid has a MW of 9.4 ppg.( the average density of carbon steel is 490 Ib/ft3)

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.