Illustrated description of removal of wooden sheeting left in Cologne River port, which was danger to shipping; Flottmann rotary drill with D. B. S. type of air compressor and air escape directly into water used for work; rows of holes bored at bottom of sheeting which, by means of ropes attached to it and to tug above, was torn away piecemeal.
Boring with rotary drills under water
Le Forage sous l'Eau au moyen de Perforatrices Rotatives
Technique Moderne ; 21 , n 8
1929
3 pages
2 Figs.
Aufsatz (Zeitschrift)
Französisch
© Metadata Copyright Elsevier B. V. All rights reserved.
Rotary-steerable system drills 300000 ft of hole
Tema Archiv | 1999
|Tema Archiv | 1986
|WORKSHOP DRILLS - CM workshop compares nine mains-powered drills.
Online Contents | 1998