Question 3247 Deck General

The correct answer is D) lower and hoist the drill string into and out of the drilled hole. The drawworks on a Mobile Offshore Drilling Unit (MODU) is the primary mechanism used to raise and lower the drill string, which consists of the drill pipe, drill collars, and drill bit, into and out of the well being drilled. The drawworks uses a series of pulleys and a drum to control the weight and movement of the drill string, allowing the operator to precisely control the lowering and hoisting of the drill string. The other answer choices are incorrect because they do not accurately describe the main function of the drawworks. The drawworks is not used to transport tubulars, store excess drill line, or maintain tension on the marine riser, which are functions performed by other MODU systems.