E
 electric
cable tray n: supports the electrical cables that feed the power
from the control panel to the rig motors.
 electric
control house n: On diesel electric rigs, diesel engines drive
electric generators. The generators produce electricity that flow throw cables
to electric switches and control equipment enclosed in a control cabinet or
panel. Electricity is fed to electric motors via the panel.
electric log n: see electric well log.
electric rig n: a drilling rig on which the energy
from the power source—usually diesel engines—is changed to electricity by
generators mounted on the engines. The electrical power is then distributed
through electrical conductors to electric motors. The motors power the various
rig components. Compare mechanical rig.
electric submersible pumping n: a form of artificial
lift that utilizes an electric submersible multistage centrifugal pump.
Electric power is conducted to the pump by a cable attached to the tubing.
electric survey n: see electric well log.
electric well log n: a record of certain electrical
characteristics (such as resistivity and conductivity) of formations traversed
by the borehole. It is made to identify the formations, determine the nature
and amount of fluids they contain, and estimate their depth. Also called an
electric log or electric survey.
elevator links n pl: cylindrical bars that support
the elevators and attach them to the hook.
 elevators
n pl: on rotary rigs and top drive rigs, hinged steel devices with
manual operating handles that crew members latch onto a tool joint (or a sub).
engine n: a machine for converting the heat content
of fuel into rotary motion that can be used to power other machines. Compare
motor.
erosion n: the process by which material (such as
rock or soil) is worn away or removed (as by wind or water).
evening tour (pronounced "tower") n: the
shift of duty on a drilling rig that generally starts in the afternoon and
runs through the evening. Sometimes called afternoon tour. Compare daylight
tour.
external cutter n: a fishing tool containing
metalcutting knives that is lowered into the hole and over the outside of a
length of pipe to cut it. The severed part of the pipe can then be brought to
the surface. Also called an outside cutter. Compare internal cutter.
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