Patent ID: 7861804

Claim:
Sleeve arrangement for a drill rig, especially adapted for damping sound and sealing to the ground, said drill rig comprising a feed beam ( 4 ) having a drill end ( 41 ) and a rear end ( 42 ), said feed beam ( 4 ) comprising a drill string ( 63 ) and a first and a second part ( 411 , 412 ) arranged near the drill end ( 41 ), the first part ( 411 ) being fixed in relation to the feed beam ( 4 ), and the second part ( 412 ) being movable in relation to the feed beam ( 4 ) in a longitudinal direction along the drill string ( 63 ), characterized in that a first flexible sleeve element ( 100 ) is attached to the first part ( 411 ), and a second flexible sleeve element ( 200 ) is attached to the second part ( 412 ), the second part ( 412 ) is adapted to move inside the first flexible sleeve element ( 100 ) and the first flexible sleeve element ( 100 ) is adapted to at least partly overlap the second flexible sleeve element ( 200 ), and the second flexible sleeve element ( 200 ) is capable of assuming an upper and a lower position, as well as all positions therebetween and thereby enabling inspection of the drill string ( 63 ) as well as enabling an adjustable connection to the ground surface.