Page 295 - Drilling Technology in Nontechnical Language

286 Drilling Technology in Nontechnical Language Second Edition

geologist). The drilling supervisor discusses the ongoing program with the
toolpusher, and the two coordinate the workload. The drilling supervisor
should not instruct the drill crews directly but only through the toolpusher
or night toolpusher. This is important because the drill crews report to the
toolpusher and not the drilling supervisor. Furthermore, unsafe situations
may be created if the drilling supervisor and driller are both unaware of
some other planned activity initiated by the toolpusher (such as maintenance
work on certain equipment).
Night drilling supervisor. In some areas, it is usual to have an
assistant to the drilling supervisor who will be on shift during the night
(usually 6 p.m. to 6 a.m.). In the past, this position did not exist, and in
some areas, it still is not used. For critical operations during the night, the
drilling supervisor will usually wish to be present, but as long as things are
proceeding according to plan, the night drilling supervisor will normally
be responsible for overall supervision.
The night DS will often prepare the daily drilling report, ready for the
drilling supervisor to check and send in the morning. On most operations,

the daily drilling report is transmitted to the operator’s drilling office by
about 6:30 a.m.
On a high-cost operation, the night drilling supervisor may well be an
experienced senior drilling supervisor, working on the night shift.
Wellsite drilling engineer/petroleum engineer (WSDE/WSPE).
Often the two terms drilling engineer and petroleum engineer are inter-
changeable. Sometimes there is no WSDE or WSPE on the rig. Supports
the drilling supervisor in the daily activities. Often a training role to gain
practical experience.

Wellsite geologist. Monitors the work of the mud loggers (if present
on the rig). Keeps a record of the geology encountered. Witnesses the work
of the wireline loggers. Will sometimes determine the correct setting depth
for casing strings.
Mud engineer. An employee of the drilling fluids contractor.

Responsible for building and maintaining the mud system as per the
program. Tests the mud properties frequently and reports on the results to

the drilling supervisor and to the mud contractor office onshore.
Other contractor personnel. There are many operations that may
require the services of other personnel, either employed by the operator

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