METHOD OF GEOPHYSICAL INSTRUMENTS DELIVERY INTO HORIZONTAL BORE-HOLE Russian patent published in 1995 - IPC

FIELD: deep oil wells drilling. SUBSTANCE: method of geophysical instruments delivery into horizontal bore-hole provides for pipe-type nozzles hanging on logging cable. Nozzles are made of pipes with inner diameter larger, than diameter of geophysical instrument, that gives cable rigidity. Lowering of geophysical instruments is exercised in protective container, fixed on low end of low pipe. Pipes, used as nozzles, are preliminary assembled and hung on rotor of borehole. Geophysical instrument is lowered by cable inside the pipes until it is set in protective container. Then pipes with protective container on logging cable are lowered in bore-hale to given depth. Lower part of the pipes assembly, equal to length of horizontal part of bore-hole, is made of pipes of material, density of which is less than density of mud. Lower part of pipes assembly is made of polyethylene and upper part - of metal. EFFECT: method is used in deep oil wells drilling. 2 cl, 2 dwg