A drilling tower is a free standing steel framework tower, in whose inside a mechanism is for boring into the earth. This mechanism consists to be extended of work platforms, there with increasing depth of the drills must and with drives for the drill. Drilling rigs are easily dismantlable implemented as a rule, since after conclusion of the drilling - independently of it, whether for bodenschaetzen such as oil or natural gas it was looked for or only one investigation drilling was accomplished, this no longer necessary it is. In place of the drilling rig with oil finds as a rule a Christian tree or an oil pump is set up, with gas finds a valve. Only with offshore construction works as a rule the drilling rig is let stand also after conclusion of the drilling work.