The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 27, 2016
Filed:
Jan. 26, 2012
Magnus Hörman, Älta, SE;
Magnus Hörman, Älta, SE;
LKAB WASSARA AB, Stockholm, SE;
Abstract
The invention concerns a method to establish communication between the inner cavity of a drill string and the surrounding material down in a drill hole () during the use of a down-the-hole drill unit with a drill string (), a down-the-hole hammer drill (), and a source of pressurized medium () that delivers a medium under pressure to the down-the-hole hammer drill. Communication is established through: (a) that a tube section () of the drill string () is assigned openings (), (b) that a piston () with an axial channel () is arranged, (c) that the piston () is inserted into the cavity of the tube section () in a manner that allows sliding, (d) that the piston () allows driving fluid to be led through a channel () from the source of pressure () to the down-the-hole hammer drill (), (e) that the piston () is assigned a first part () of a recovery means (), which part can be united with a second part (), (f) that a lifting arrangement () is arranged at the surface level, (g) that the second connector () of the recovery means () is lowered into the drill hole (), the piston () is fished up out of the drill hole and the compartment in the cavity of the tube section () that is formed is used as a measurement compartment.