Abstract: A method and device for withdrawing an element fastened to a mobile installation from the influence of the movements of this installation. The device comprises at least one actuating cylinder, at least one accumulator and several pulleys, are determined so that the mechanical and hydro-pneumatic forces are substantially equal.

Abstract: This turbo-coring device comprises a tubular body provided with a coring bit and surrounded by a following pipe provided by a reaming bit. The tubular body is connected to the turbine through a fluid distributor having a side opening for discharging above the following pipe in the annular space between the device and the borehole wall a fraction of the fluid leaving the turbine, while the remaining fraction feeds the tubular body.The following pipe is connected to the outer wall of the fluid distributor through releasable bayonet type latching means.Means are provided for automatically closing the fluid discharge opening when the lower part of the tubular body becomes obturated by ground formations and an annular sealing packer is positioned between the tubular body and the following pipe.

Abstract: This device comprises means for handling a flexible elongate member, in combination with means for automatically controlling said handling means in response to a detected deformation of the loop portion formed by the flexible member near the storage basket, so as to bring this loop portion back to a preselected geometrical configuration.

Abstract: The invention relates to a flexible elongated member provided with a reinforcing armouring formed by profiled rods. The convolutions of said reinforcing armouring are wound in such a manner that the moment of inertia of the cross section of the profiled rods is maximum with respect to an axis perpendicular to a radial direction of the elongated member.

Abstract: The present invention relates to an apparatus or device for storing elongated flexible elements, such as drilling pipe, in a coiled form. This apparatus includes an inner cylindrical framework supported about a vertical axis, an outer cylindrical framework concentrically separated from the inner framework and connected thereto by an annular base plate closing the bottom of the apparatus. The space between the inner and outer frameworks is open at the top to receive the elongated elements, and the annular base plate is formed of a plurality of annular sector elements connected together in such a manner as to allow a vertical displacement of respective adjacent elements with respect to one another. Various means for connecting adjacent elements are provided. Moreover, various driving and supporting members are provided for rotating the apparatus about the vertical axis.