steam rig

steam rig

[′stēm ‚rig]
(petroleum engineering)
A drilling rig which is powered by a number of portable boilers.
References in periodicals archive ?
"The price at which these valuable and efficient little gasoline fire engines may be procured makes it possible for smaller towns to procure them," the article noted, "whereas the original cost and expense of maintaining the old-fashioned steam rig makes it impossible for many towns to procure and maintain one of the more expensive rigs."
'Using physical tools is a different approach.' The team tested a steam rig that heats soil to 160[degrees]F in just 90 seconds and keeps it hot for 20 minutes, long enough to kill soil pests as effectively as methyl bromide.