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Exercise 2. Complete the sentences with the following
words:
drill string, rig timber, seamless drill pipe, pipe couplings,
hard rock areas, roller cutter bit, steam pressure, steam pump.
1. Steel derrick usage increased during the early 1920s in
areas where good__________ was not available.
2. Alloy steels now are used extensively in___________
components.
3. Drill pipe tool joints replaced ordinary ___________about
1910 or 1912 and _______________replaced the lapweld in early
1920s.
4. The _____________was invented by Mr. Hughes in 1908
but did not come into general use until 1915 and then only to a
limited extent in__________.
5. The fluid circulating system used a conventional duplex steam
pump designed for general industrial use, capable of pumping 150 gmp
at 175-200 psi with ____________of 75-100 psi.

Exercise 3. Match the words on the left with their
translation on the right
well пласт
debris втулка
sprocket свердловина
hexagon шлам
bushing муфта
tool joint зубчаста передача
coupling замок
gear бурова вишка
derrick шестигранник
roller bearing зубчаста зірочка
formation підшипник

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