Extremely Deep Borehole Drilling

The most deep-seated gas-bearing layer in Europe lies in Magossa (Northern Italy) at the depth of 6100m, while the deepest industrial gas production borehole (7460m) is located Texas , USA.

A decent visual representation of the modern super-deep borehole and its equipment is available at the example of one of the deepest wells in the world – Beida site drilled in the state of Oklahoma. The well depth equals 9159 m. The drilling works began in 1970 and lasted for 1.5 years. The height of the rig is 43.3 m, load capacity – 908 tons. Drawworks power equals 2000 kW, and each of the two mud pumps – 1000 kW. The total capacity of the ground circulation system for the mud is 840m; the wellhead blowout valve operates with a pressure of 105.5 MPa.

Continue reading