Drill Pipes

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Drill Pipes


pipes used in drill holes for the lowering and raising of rock-crushing tools, the transmission of rotation, the creation of an axial load on the tool, and the supply of flushing fluid or compressed air to the mine face. A distinction is made among conventional, heavy, and drive drill pipes.

Conventional drill pipes are seamless and are made of steel or aluminum alloys of round cross section, with a wall thickness of 4.75-11 mm, which are coupled by drilling wrenches or semicouplers with a special coarse taper thread. Drill pipes are thickened at the ends for greater strength. Heavy drill pipes are made of steel with a round or square cross section, with a wall thickness of 16-50 mm and higher; they are also coupled by threads and serve to increase the rigidity of the lower compressed portion of the column and to create a load on the rock-crushing tool. The drive drill pipe, which has a polyhedral cross section, is located at the top of the column and transmits the rotation from the rotary table of the drilling rig to the column.

Drill-pipe improvements have resulted in increased strength, durability, and tightness of threaded joints, decreased hydraulic resistance of the sink hole, and a reduction in mass.


Il’skii, A. L., V. M. Kas’ianov, and V. G. Poroshin. Burovye mashiny, mekhanizmy i sooruzheniia. Moscow, 1967.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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