Match the words in the left column with the definitions in the right one.
1. traveling block
A. a wire rope made up of a number of strands wound around a steel core, used to lift or lower drill pipe
2. crown block
B. a shallow cased hole close to the rotary table. When making up a string, each single is stood here so that it can be connected quickly and easily to the kelly
3. derrick
C. a device that has several independently mounted sheaves or pulleys and used to lift and lower elevators
4. swivel
D. a piece of equipment designed to mix and prepare drilling mud.
5. elevator
E. a piece of equipment used to transfer rotary motion through a master bushing to the kelly, to drillpipe and, eventually, to the drill bit
6. drill line
F. a piece of equipment used to prevent the rotary motion of the kelly (or drill string) from being transferred to the drilling line
7. shale shaker
G. a device on the top of the derrick that provides means of taking drill line from the hoisting drum to the travelling block
8. kelly bushing
H. a double or a triple, two or three joints connected together.
9. rotary table
I. a structure above the well used for drilling string tripping, location of stands and protection of drilling crew against wind and precipitation.
10. mousehole
J. a device that is attached to the bails of the traveling block and used to grip joints
K. the part of the drive assembly which transmits motion to the kelly and permits the kelly to move vertically while it is rotating or still.
Describe the function of the following elements, using the words given in the right column.
