Page 13 - A Primer of Oilwell Service and Workover Completion
P. 13
SERVICE AND WORKOVER EQUIPMENT
Petroleum Extension-The University of Texas at Austin
SERVICE AND WORKOVER EQUIPMENT
efore the s, rig builders RIG EQUIPMENT They come in a variety of
Busually built a permanent sizes. In general, servicing jobs
Service and workover rigs, like
derrick at each well for drill- require smaller rigs than work over
drilling rigs, are machines for
ing and maintenance of the jobs. The smallest rigs raise and
hoisting pipe, wireline, and tools
well throughout its life. Now, lower a wireline or conductor line.
into and out of a well. They have
however, the whole drilling rig Oilfield workers sometimes call
a derrick or mast, a draw works,
is moved to a new site when these wireline rigs (fig. .).
drilling is finished. The well is and a power source. Unlike drill-
ing rigs, not all of them have cir-
left with only a wellhead and
culation or rotary systems.
sometimes a pump, so service
and workover companies must
bring the equipment they need
to work in the well.
The amount and type of
equip ment they need depends
on the job. One job may require
a light-duty rig and a couple
of workers. The next well may
need a somewhat larger rig
with a tall mast and a crew of
several workers. Another job
may require extra crews to Figure .. A small, light-duty unit
work around the clock and a
rig capable of light drilling and
heavy-duty hoisting.
