TRENCHLESS PIPE DRIVING METHOD Russian patent published in 2010 - IPC E02F5/18 E21B7/20 F16L1/28 

FIELD: mining.

SUBSTANCE: pipe driving method envisaging controlled pipe driving from the initial point under an obstacle to the final point. After that one disconnects the boring head from the driven pipes and the driven pipes string is connected via a special connective pipe of the product pipes sting prepared on the surface at the final point. Then the driven pipes are withdrawn from the well to the initial point with the product pipes string simultaneously drawn into the well. The well is stabilised via the driven pipes. In the driven pipe one provides for an inner pipe intended for receipt and transmission of forces occurring and for receipt of the required connective lines and/or empty pipes for the boring head as well as for a mounted outer shell which may be fitted along its diametre to the product pipes string to be driven.

EFFECT: driving tensile large gauge pipelines in the ground.

19 cl, 21 dwg