Device for damping vibrations of a drilling tube
AssigneeGebruder Heller Verwaltungsgesellschaft mit beschrankter Haftung
InventorFranz Mim
Life of this patent
Estimating the term…
Abstract
A device for damping vibrations of a drilling tube by the slip between the ube and a fly-wheel which surrounds the tube and is frictionally connected to the tube by a slotted sleeve which is axially displaceable by adjusting means for adjusting the frictional connection. The adjusting means are connected to the sleeve by bearings so that they can be actuated while the tube and hence the sleeve and the fly-wheel are rotating during drilling.
Claims13
A device for damping vibrations of a drilling tube rotatably mounted in a deep-drilling machine coaxially to an axis of rotation, comprising
- an inertia mass,
- means comprising a support for rotatably supporting said inertia mass for rotation substantially about said axis of rotation,
- a connecting means for frictionally connecting the tube to said inertia mass, said connecting means being adjustable for adjusting the frictional connection between the tube and said inertia mass,
- an adjusting means for adjusting said connecting means,
- bearing means for operatively connecting said adjusting means to said connecting means while permitting said connecting means to be rotated about said axis of rotation relative to said adjusting means,
- said support means supporting said adjusting means independent of said inertia mass such that said adjusting means does not take part in the rotation of said inertia mass.
A device for damping vibrations of a drilling tube rotatably mounted in a deep-drilling machine coaxially to an axis of rotation, comprising
- an inertia mass,
- a support for rotatably supporting said inertia mass for rotation about said axis of rotation,
- a connecting means for frictionally connecting the tube to said inertia mass, said connecting means being adjustable for adjusting the frictional connection between the tube and said inertia mass,
- an adjusting means for adjusting said connecting means, wherein a bearing means is provided for connecting said adjusting means to said connecting means so that said connecting means can be rotated about said axis of rotation relative to said adjusting means,
- said inertia mass has the form of an annular body having an axis of symmetry and a frusto-conical opening extending coaxially to said axis of symmetry,
- said annular body being mounted coaxially to said axis of rotation in said support,
- said connecting means has the form of a slotted sleeve having two ends, a frusto-conical outer surface which fits to said frusto-conical opening so that said frusto-conical opening forms a seat for said sleeve, and a cylindrical inner surface which fits to the outer surface of the tube,
- said sleeve being axially displaceable for adjusting the frictional connection between said annular body and the tube when the tube extends through said sleeve,
- said adjusting means having two axially displaceable adjusting members for said two ends of said sleeve,
- said bearing means having at least two bearings located between said two ends of said sleeve and said two adjusting members.
Dependencies are inferred from the claim text.