Vibration generator for an drilling installation, underwater drilling installation and underwater drilling system
AssigneeIHC Marine and Mineral Projects (Proprietary) Limited
InventorLourens Christiaan de Jager
Life of this patent
Estimating the term…
Abstract
A vibration generator (9) for a drilling installation comprises a housing (16), at least one rotation body (17), a suspension (24) by means of which the rotation body is suspended rotatably within the housing, the mass centre of the rotation body (17) being eccentric with respect to the rotation axis of the suspension, and a drive (18) for rotating the rotation body. The housing (16) holds a fluid (15) which is in contact with the rotation body (17) whereby relative rotation between the rotation body and the fluid generates a flow resistance and in that the rotation body comprises flow resistance reduction means (25).
Claims16
A vibration generator for a drilling installation, said generator comprising
- a housing,
- at least one rotation body,
- a suspension by means of which the rotation body is suspended rotatably within the housing, the mass centre of the rotation body being eccentric with respect to the rotation axis of the suspension, and
- a drive for rotating the rotation body,
- wherein the housing holds a fluid which is in contact with the rotation body whereby relative rotation between the rotation body and the fluid generates a flow resistance and in that the rotation body comprises flow resistance reduction means;
- and
- wherein the circumference of the rotation body is fully circular,
- wherein the rotation body comprises at least one edge oriented transversely with respect to the rotational direction, said at least one edge being provided with said flow resistance reduction means.
Dependencies are inferred from the claim text.