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4 Find synonyms in the text for the following words.
techniques to drill
steamboat fluid
rig bailer
clay rotate
bit motor
mud seesaw
caving

5 Find antonyms in the text for the following words.
soft formations clay
disadvantage plain
rotary drilling top
simple hard-rock formation
quiet

6 Say whether the following statements are true or false.

1 The two drilling techniques are rotary drilling and directional
drilling
2 Colonel Drake and George Bissel drilled the Oil Creek site.
3 Cable-tool rigs had more parts and a cable tool had a powered
bullwheel mounted in derrick.
4 At Drake’s rig, a 10-horsepower (4.5 – watt) steamboat engine
powered the walking beam.
5 Cable-tool drilling worked very well in the hard-rock formations
such as those in eastern U.S., the Midwest, and California.
6 A far bigger problem than bailing, that led to cable-tool drilling's
demise, was that the cable-tool technique didn't work in soft
formations like clay or loose sand.

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