METHOD AND DEVICE FOR DRIVING INTO THE MARINE SUBSURFACE AT GREAT DEPTHS, A TUBULAR TOOL FOR SOIL SAMPLING OR FOR MEASURING SOIL CHARACTERISTICS

摘要

The invention relates to a device to penetrate into the - sea floor, particularly at great depths greater than a thousand meters, a tubular tool for taking samples of the ground or for measuring the characteristics of the ground. According to the invention, the tubular tool (1) that it is wished to penetrate into the - sea bed is secured to a base for positioning on the seabed, and the device comprises at least one fluidic jack (16), which can be controlled from the surface, which is fixed to said base comprising a piston (4) is displaced in a cylindrical annular chamber (3) to an axis directed parallel to the axis (y ′ y) of penetration of the tool (1), by driving the tool (1) as a function of the removal or the intake of the fluid which is made in said chamber (3), said piston (4) being subjected to the hydrostatic pressure prevailing at the depth at which has been lowered, the device being put into communication with the sea environment of its outer side of said chamber (3).