Abstract: A deivation device for causing a conductor string to deviate as it is being driven into a subterranean formation.The deviation device comprises a straight tubular element, open at both ends, wherein the wall of the tubular element at an end part is provided with guide faces normally directed downwardly in the formation. These guide faces are inclined relative to the longitudinal axis of the tubular element and are arranged within the periphery of the tubular element.Said guide faces consist of a first guide face at the outer side of the tubular element and a second guide face at the inner side of the tubular element. The wall portion of the tubular element which is provided with the first guide face is arranged diametrically opposite to the wall portion of the tubular element which is provided with the second guide face, the guide faces of the tubular element, when taken in diametric cross-section, being substantially parallel to each other and at the same angle to the axis of the tubular element.

Abstract: A marine conductor string, wherein its lower part is provided with a connector. The connector comprises first and second coaxial tubular elements, a sleeve fixed to said first tubular element and axially displaceable relative to a second tubular element. The connector is furthermore provided with a fluid passage in the sleeve or in the second tubular element. Said fluid passage is so arranged that, by axial displacement of the sleeve relative to the second tubular element, a fluid communication between the interior of the conductor string and the water surrounding the conductor string can be created or eliminated. The invention relates as well to a connector suitable for use in the said conductor string.