US 12,276,193 B2
Underground drilling rig and method for erecting same
Jürgen Volkers, Bad Bentheim (DE); Arend Lödden, Bad Bentheim (DE); and Achim Nordbeck, Bad Bentheim (DE)
Assigned to BENTEC GMBH DRILLING & OILFIELD SYSTEMS, Bad Bentheim (DE)
Appl. No. 17/633,574
Filed by BENTEC GMBH DRILLING & OILFIELD SYSTEMS, Bad Bentheim (DE)
PCT Filed Aug. 10, 2020, PCT No. PCT/EP2020/072381
§ 371(c)(1), (2) Date Feb. 7, 2022,
PCT Pub. No. WO2021/028383, PCT Pub. Date Feb. 18, 2021.
Claims priority of application No. 10 2019 212 152.7 (DE), filed on Aug. 13, 2019.
Prior Publication US 2022/0307373 A1, Sep. 29, 2022
Int. Cl. E21C 41/16 (2006.01); E21B 7/04 (2006.01); E21B 15/00 (2006.01)
CPC E21C 41/16 (2013.01) [E21B 7/04 (2013.01); E21B 15/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for erecting a drilling rig (10) for sinking boreholes on hydrocarbon deposits or for developing geothermal energy or other valuable materials or for research purposes, in a tunnel driven into a rock mass, which comprises a horizontal section functioning as a production tunnel (12) and production line, from which a vertical section extends as a mast shaft (14),
characterized by the following method steps:
erecting a mast structure (20) in the mast shaft (14) by means of an erecting structure (50) in the production tunnel (12),
wherein the mast structure (20) comprises a plurality of mast segments (60) connected to one another or connectable to one another,
wherein successive mast segments (60) are fed to the erecting structure (50) on an input side of the erecting structure (50) in a horizontal or at least substantially horizontal orientation,
wherein by means of the erecting structure (50) in each case at least one mast segment (60) on an output side of the erecting structure (50) is erected in a vertical or at least substantially vertical orientation into the mast shaft (14) or at least pointing into the mast shaft (14), and
wherein while feeding further mast segments (60) on the input side of the erecting structure (50) the or each mast segment (60) already vertically erected on the output side of the erecting structure (50) is raised into the mast shaft (14).