Underwater drilling arrangement and method for making a bore

摘要

An underwater drilling arrangement for marking a bore in a bed of a lake, sea or river with a service platform which can be lowered for placing on the lake, sea or river bed, a drill drive which is mounted so that it is axially displaceable on the service platform, and a drill rod with drill head which can be driven in rotation via the drill drive. A conveying channel is formed in the drill rod, through which a conveying fluid together with excavated drill cuttings can be conveyed upwards, and a discharge opening for the conveying fluid together with the excavated drill cuttings is provided, via which the conveying fluid can be discharged underwater together with the excavated drill cuttings above the drill drive.

主权项

1. An underwater drilling arrangement for making a bore in a bed of a water body, said underwater drilling arrangement comprising
a service platform which is lowered for placing on the bed of the water body, the service platform including a base body, a guide tube adjustably mounted on the base body, the guide tube being axially displaceable with respect to the base body, the guide tube being rotatably drivable via a guide tube drive for screwing the guide tube into the bed of the water body, a drill drive adjustably mounted and guided in the guide tube, the drill drive being axially displaceable with respect to the guide tube, a drill rod with drill head being rotatably driven via the drill drive, wherein the drill rod extends through the drill drive and is located centrally with respect to the guide tube and the drill drive, a conveying channel formed in the drill rod, through which a conveying fluid is conveyed upwards together with excavated drill cuttings, a discharge opening for the conveying of the conveying fluid together with the excavated drill cuttings via which the conveying fluid is discharged underwater together with the excavated drill cuttings above the drill drive, the drill rod being a double pipe, in which the conveying channel for conveying excavated drill cuttings upward and a feed channel for feeding the conveying fluid are formed, and an ejection line located above the drill drive, the ejection line being attached to the drill rod by a coupling for fluid connection to the conveying channel, the ejection line having a discharge opening for release of excavated drill cuttings from the drill rod.