| 摘要 |
A retrievable core sampling assembly for latching to or relative to a rotatable tubular housing 1 of a core sampling apparatus to allow the capture and retrieval of a core 19 from a subterranean formation, the assembly comprising or including: a core catcher barrel 18 for a core 19, the barrel 18 being rotationally isolated from the tubular housing 1 and cooperable with a core taking bit 2 coupled to the rotatable tubular housing 1 to retain a core 19, and a hammer 100 for providing impact to the core taking bit 2 along a longitudinal impact path that is or is substantially decoupled from the core catcher barrel 8 so that when latched, rotation and impact of the core taking bit 2 captures and passes core material from the formation to the core catcher barrel 2 in manner that isolates a core 10 9 in the core catcher barrel 18 from rotation and impact forces. |
