CORE RECEIVING DEVICE Russian patent published in 1998 - IPC

FIELD: bore-hole drilling machinery and equipment. SUBSTANCE: this relates to facilities for drilling inclined and horizontal bore-holes with core taking. Core receiving device has external pipe with drilling bit in its lower part, bearing unit, and internal core receiving pipe with core taker. Internal core receiving pipe is made in the form of two equal half-pipes with circular bores in their external surface. Seated in circular bores are contracting members which are made in the form of yokes with radial antifriction bearings. In addition, contracting members are installed for possible interaction with internal surface of external pipe without transmitting rotation from it to internal core receiving pipe. Application of device ensures larger yielding of core due to stationary state of core receiving pipe in process of drilling. EFFECT: higher efficiency. 1 dwg