Chapter II the hoisting system

EXERCISE 1 Read and translate the text, using the words after the text.

The function of the hoisting system is to provide a means of lowering or raising drill strings, casing strings, and other subsurface equipment into or out of the hole. The principal components of the hoisting system are the derrick and substructure, the block and tackle and the draw-works. Two routine drilling operations performed with the hoisting system are called making a connection and making a trip. Making a connection refers to the periodic process of adding a new joint of drill pipe as the hole deepens. Making a trip refers to process of removing the drill string from the hole to change a portion of the down hole assembly and then lowering the drill string back to the hole bottom. A trip is usually made to change a dull bit.

The function of the derrick is to provide the vertical height required to raise sections of pipe from or lower them into the hole. In addition to their heights, derricks are rated according to their ability to withstand compressive loads and wind loads.

To provide working space below the derrick floor for pressure control valves called blowout preventers, the derrick is usually elevated above the ground level by placement on a substructure.

The block and tackle is comprised of the crown, the travelling block and the drilling line. The draw works provide the hoisting and braking power required to raise or lower the heavy strings of pipe. The principal parts of line draw-works are the drum, the brakes, the transmission and the cat heads. The drum transmits the torque required for hoisting or braking. It also stores the drilling line required to move the travelling block the length of the derrick.

The words to be memorized:

1. casing string – обсадная колонна

2. subsurface equipment – подземное оборудование

3. substructure – подвышечное основание

4. block – блок

5. tackle – такелаж, канаты

6. draw-works – лебедка

7. to make a connection – наращивать (бурильную колонну)

8. to make a trip – поднимать (колонну)

9. dull – затупившийся, сработанный, изношенный

10. pressure control valve – клапан регулирования давления

11. crown-block – крон-блок

12. travelling block – талевый блок

13. drilling line – талевый канат

14. drum – барабан

15. brake – тормоз

16. transmission – трансмиссия

17. cat head – шпилевая катушка, успокоитель талевого каната

18. torque – кручение

EXERCISE 2 Answer the following questions.

1. What is the function of the hoisting system?

2. What are the principal components of the hoisting system?

3. What is called making a connection and making a trip?

4. A trip is usually made to change a dull bit, isn`t it?

5. What is the function of the derrick?

6. What are the blowout preventers?

7. What parts is the block and tackle comprised of?

8. What is the function of the draw-works?

9. What are the principal parts of the draw-works?

10. What transmits the torque required for hoisting or braking?

EXERCISE 3 Find the proper Russian equivalents to the given English terms.

1. dull bit	1. кручение
2. valve	2. противовыбросовый превентор
3. to make a trip	3. талевый блок
4. torque	4. клапан
5. blowout preventer	5. затупившийся бур
6. travelling block	6. тормоз
7. to make a connection	7. подвышечное основание
8. substructure	8. лебедка
9. draw-works	9. наращивать колонну
10. brake	10. поднимать колонну

EXERCISE 4 Memorize the following word combinations, give their Russian equivalents.

Casing string, hoisting system, principal components, routine operations, bottom hole, dull bit, wind loads, compressive loads, working space, blowout preventer.

EXERCISE 5 Translate the sentences from Russian into English.

1. Основные компоненты спускоподъемной системы – это вышка и подвышечное основание, блок, такелаж и лебедка.

2. Поднятие колонны обычно осуществляется, чтобы поменять затупившийся бур.

3. Блок и такелаж состоит из кронблока талевого блока и талевого каната.

4. Лебедка обеспечивает спускоподъемные операции.

5. Барабан передает кручение, необходимое для спуска, подъема и торможения.

6. Основные части лебедки – это барабан, тормоза, трансмиссия и шпилевые катушки.

EXERCISE 6 Retell the text and discuss in dialogs with your group mates this theme.

EXERCISE 7 Prepare a presentation about the principal components of the hoisting system.