EP 4222344 B1 20240612 - DRILLING SYSTEM FOR RECOVERING NEARLY UNDISTURBED DRILL CORES FROM LOOSE TO SOLID GROUND
Title (en)
DRILLING SYSTEM FOR RECOVERING NEARLY UNDISTURBED DRILL CORES FROM LOOSE TO SOLID GROUND
Title (de)
BOHRSYSTEM ZUM BERGEN VON NAHEZU UNGESTÖRTEN BOHRKERNEN AUS LOCKEREM BIS FESTEM GRUND
Title (fr)
SYSTÈME DE FORAGE POUR RÉCUPÉRER D'ÉCHANTILLON DE CAROTTE PRESQUE NON DÉTRESSÉS D'UN SOL MOBILE À PLEIN
Publication
Application
Priority
- CH 12402020 A 20200930
- EP 2021076384 W 20210924
Abstract (en)
[origin: CA3194478A1] The apparatus is operated with a conventional rotary drive with a pile driver hammer. The torque and the blows of the drill head are transmitted to a drilling starting pipe (8) with a drill bit. Within the rotating starting pipe (8) there is a non-rotating sleeve (17). It is applied at the bottom to the inner side of the drill bit rotating beneath it. As a particular feature, the sleeve (17) is connected in terms of compressive and tensile force via a sleeve adapter (21) to axially successive parts that are rotatable with respect to one another and a pressurizing, flushing and recovering pipe DSB (19), connected to said parts, with the rotating drill head. The DSB (19) rotates together with the drill head and the drill pipe, and the sleeve adapter (21) connects to the non-rotating sleeve (17). With the DSB, first of all the sleeve (17) is pressurized from above, secondly flushing is effected, in that the flushing water for the bore is guided in the DSB (19) and is pressed outwardly out of the sleeve (17), and thirdly the recovery of the sleeve (17) is enabled, for an approximately intact drilling sample.
IPC 8 full level
E21B 25/00 (2006.01)
CPC (source: CH EP KR US)
E21B 1/14 (2020.05 - US); E21B 25/00 (2013.01 - EP); E21B 25/02 (2013.01 - CH KR US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
CH 717907 A1 20220331; AR 123616 A1 20221221; AU 2021354880 A1 20230420; AU 2021354880 A9 20240620; BR 112023005698 A2 20230425; CA 3194478 A1 20220407; CL 2023000950 A1 20231124; CN 116261621 A 20230613; EP 4222344 A1 20230809; EP 4222344 B1 20240612; JP 2023543523 A 20231016; KR 20230078704 A 20230602; MX 2023003763 A 20230426; TW 202214952 A 20220416; US 2023366282 A1 20231116; WO 2022069372 A1 20220407; ZA 202303527 B 20240424
DOCDB simple family (application)
CH 12402020 A 20200930; AR P210102678 A 20210927; AU 2021354880 A 20210924; BR 112023005698 A 20210924; CA 3194478 A 20210924; CL 2023000950 A 20230330; CN 202180067475 A 20210924; EP 2021076384 W 20210924; EP 21782980 A 20210924; JP 2023520013 A 20210924; KR 20237012901 A 20210924; MX 2023003763 A 20210924; TW 110134162 A 20210914; US 202118029218 A 20210924; ZA 202303527 A 20230313