EP 4388169 A1 20240626 - DUAL TUBE DRILL STRING COMPONENTS
Title (en)
DUAL TUBE DRILL STRING COMPONENTS
Title (de)
DOPPELROHRBOHRSTRANGKOMPONENTEN
Title (fr)
ÉLÉMENTS DE TRAIN DE TIGES DE FORAGE À DEUX TUBES
Publication
Application
Priority
- US 202163234950 P 20210819
- US 2022040788 W 20220818
Abstract (en)
[origin: WO2023023268A1] A drill string component having a central axis can comprise an outer tube having a pin end and a box end. The outer tube can define an inner bore. An inner tube can be disposed within the inner bore of the outer tube. The inner tube can defines an inner bore. A plurality of rolling elements can be disposed between the outer tube and the inner tube. The wall thickness of each of the outer tube and the inner tube can be less than 1/4 inch.
IPC 8 full level
E21B 17/04 (2006.01); E21B 17/18 (2006.01)
CPC (source: EP)
E21B 17/18 (2013.01); E21B 21/12 (2013.01)
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
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2023023268 A1 20230223; AU 2021106774 A4 20211118; AU 2022328509 A1 20240328; CA 3229192 A1 20230223; EP 4388169 A1 20240626; PE 20240861 A1 20240423
DOCDB simple family (application)
US 2022040788 W 20220818; AU 2021106774 A 20210824; AU 2022328509 A 20220818; CA 3229192 A 20220818; EP 22859176 A 20220818; PE 2024000264 A 20220818