Главная страница | Контакты | Случайная страница Автомобили Астрономия Биология География Дом и сад Другие языки Другое Информатика История Культура Литература Логика Математика Медицина Металлургия Механика Образование Охрана труда Педагогика Политика Право Психология Религия Риторика Социология Спорт Строительство Технология Туризм Физика Философия Финансы Химия Черчение Экология Экономика Электроника

Power system

Without 1. power nothing on a rig operates. Machinery must have an energy source to make it go. On virtually every drilling rig, the power comes from internal-combustion engines, which are called prime movers. Further, they often use diesel 2.. Because of the way diesel engines operate, they deliver more turning force, or torque, than gasoline engines. As a result, many industries, including the 3. _industry, use diesels.

A 4. may need from two to four prime movers, depending on its size. The bigger the rig, the deeper it can drill and the more power it needs. Thus, big rigs have three or four prime movers. Together, they develop 4,500 horsepower (about 3,300 kilowatts) or more. In comparison, a powerful car engine may put out only 300 horsepower (220 kilowatts) or so; most develop even less.

This power must 5. to the rig's components to make them work. For example, at the same time as the rotary table needs power to turn the bit, the mud pump needs power to 6. drilling mud. What is more, to provide maximum power to a component, the 7. must also be able to combine the power of two or more engines. Two common methods transfer power on today's rigs and allow the driller to combine engine power: mechanical transmission and electrical transmission.

(Baker R. “A Primer of Oil Well Drilling”, 2001, Austin, Texas)

Define whether the following sentences are true (T) or false (F).

3. Lab. Assignment:”Power Systems and Instrumentations”.

Terms and Vocabulary

4. Read the text “Hoisting system components” and do exercises.