DEVICE TO SECURE CASINGS OF DOWNHOLE INSTRUMENTATION OF BOTTOMHOLE TELEMETRIC SYSTEM INSIDE DRILLING STRING INSERT Russian patent published in 2017 - IPC E21B47/01 

FIELD: mining.

SUBSTANCE: invention is intended to secure casings of downhole instrumentation of bottomhole telemetric system inside the drilling string insert. The device includes a spider with shear pins made with projections entering the grooves configured inside the insert in the drilling string and secured against axial and radial movement by a threaded tightening nut. The spider is made of two component parts and consists of a set ring with projections entering into the grooves made inside said insert in the drilling string and casings of deep-well instrumentation of bottomhole telemetric system. Said projections comprise the set ring with projections provided with holes coaxial to holes made in projections of casings of deep-well instrumentation. The shear pins are installed in said coaxial holes.

EFFECT: possibility of repeated assembly and disassembly of deep-well instrumentation into the drilling string without disturbing the integrity of device fixation to reduce labour consumption.

2 cl, 2 dwg