The element that supports the weight of the drill stem, allows the drill stem to rotate, and provides a pressure-tight seal and passageway for the drilling mud to be pumped down the inside of the drill stem is called the ___________________.
A
swivel
B
bail
C
kelly
D
cock
E
İlgili Sorular
Clouds that form as small white flakes or scaly globular masses covering either small or large porti...BOTH INTERNATIONAL & INLAND A vessel approaching a narrow channel shall __________.Which statement(s) concerning the effect of Coriolis force on ocean currents is(are) correct?What is the minimum number of fire pumps required on a cargo vessel of 2,000 GT?On the COASTAL DRILLER, the level of water in each of two pump bilge pits is monitored by __________...