Bearing units for deep drilling units

Abstract

The present invention relates to a bearing apparatus for a deep drilling apparatus by flushing liquid through the drill (1), the bearing apparatus having a plurality of radial external and radial internal bearing rings (6,7), wherein the radial external bearing ring (6) is coaxially arranged on the radial inner bearing ring (7), wherein radially between the bearing ring (6) is provided with a ball (8,9), the ball rolls within the bearing groove (6a, 7a), and wherein the bearing groove (6a, 7a) Axially bounded on both sides by a convex shoulder (6b, 7b), the convex shoulder having a convex shoulder surface (6c, 7c) stretched parallel to the longitudinal axis of the bearing (11). In order to shortly constitute such a bearing apparatus (1) in the axial extension of the axial direction is connected to at least one plain bearing (1), and in order to simplify the construction, the radial external bearing ring (6) of the convex shoulder surface (6c, 7c) and the radial internal bearing ring (7) of the convex shoulder surface (7c) of the outer diameter (Da) is designed to be such that the convex shoulder surface (6c, 7c) undertakes the function of a parallel radial plain bearing having radial clearance (S).

Description

technical field [0001] The invention relates to a bearing arrangement for a drill bit of a deep drilling device through which a flushing liquid flows, the bearing arrangement having a plurality of radially outer and radially inner bearing rings, wherein the radially outer bearing ring is in the radial direction Coaxially above the inner bearing rings, balls are arranged radially between the bearing rings, the balls roll in the bearing grooves of the bearing rings, and the bearing grooves are axially on both sides by shoulders Delimited, the shoulders have shoulder surfaces which run parallel to the longitudinal axis of the bearing and lie opposite one another. Background technique [0002] Such a bearing arrangement for a deep drilling device is known from DE 101 62 473 B4. The bearing arrangement comprises a relatively large number of axially arranged ball bearings, which are designed as 4-point ball bearings and form ball bearing sets. In the 4-point ball bearing, the ra...

AI Technical Summary

Problems solved by technology

As a result, the bearing arrangement axially extends the length of the at least one slide bearing, so that such a bearing arrangement requires more installation space in the longitudinal direction, and the smallest possible directional change radius of the drill bit for steering is disadvantageously increased

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