1. Engineering
  2. Mechanical Engineering
  3. 4 a rig is hoisting a set of drill pipes...

Question: 4 a rig is hoisting a set of drill pipes...

Question details

4. A rig is hoisting a set of drill pipes, and the static tension of the fast line when lifting the drill pipes upward is 20,000 lbf. Twelve lines are strung between the crown block and the traveling block and the dead line is anchored to a derrick leg on one side of the v-door. The mechanical efficiency for twelve-line block-and-tackle system is 0.770 a. Calculate the weight of the dill pipes being lifted (6 pts). b. If the maximum drawworks horsepower available of the derick is 649.35 hp, calculate the maximum hook horsepower (6 pts). the mentioned drill pipes (8 pts). d. Calculate the derrick load when upward motion is impending (8 pts)
Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution