REMOVABLE SAMPLER Russian patent published in 1998 - IPC

FIELD: drilling equipment and appliances. SUBSTANCE: this is intended for taking cores of small diameter and also for taking radioactive cores in horizontal drilling. Removable sampler has fishing grip, stops, and hollow barrel. Hollow barrel is adapted for location in core pipe and for taking torque from core pipe. Installed on hollow barrel is spring-loaded collet with gripping lock. Gripping lock has longitudinal protrusions. Made in hollow barrel are longitudinal slots which accommodate longitudinal protrusions of lock. Longitudinal recesses are made in core pipe. Longitudinal slots in their upper section are of reduced depth. EFFECT: higher efficiency. 7 dwg