TECHNOLOGICAL SYSTEM FOR EXAMINING HORIZONTAL AND SLANTING WELLS, REMOVABLE WEIGHTING MATERIAL FOR GEOPHYSICAL SYSTEM (VARIANTS) AND METHOD FOR EXAMINING HORIZONTAL AND SLANTING WELLS Russian patent published in 2004 - IPC

FIELD: geophysics.

SUBSTANCE: system has geophysical base cable, engine and complex armored device. Engine is placed on base cable and is made of two portions, upper portion for mounting removable weighting material and lower portion containing constant weighting material and lightened section. On lower portion of base cable layers are placed in following order: polymer base, constant weighting material, armoring wires lay, first - evening polymer casing, then second - outer polymer casing. Constant weighting material is made of metallic, for example, lead pipe or winding of metallic, for example, lead ribbon, or alternating windings of steel and lead wires placed in one or more layers with fixed length of constant weighting material determined by calculations. Removable weighting material according to first variant is made of set of metallic loads, each of which has body of, for example, cylindrical shape, with central longitudinal channel, width necessary for cable placement, transverse groove and insert for groove and central channel, while end on the other side of body has concave spherical shape, and on the other side - convex spherical shape with socket for insert fixing means. Removable weighting material according to second variant is made of a set of metallic loads, each of which has body of, for example, cylindrical shape, with central groove necessary for cable placement, while ends have fixing shelves with length equal to half of length of central groove and placed asymmetrically relatively to central groove. Method for examining horizontal and slanting wells includes delivering devices into research interval by geophysical base cable with engine and later registration of geophysical parameters. Optimal weight and linear relations of upper and lower portions of engine are preliminarily determined for each profile of well shaft with consideration of incline measurements results, well conditions and weight of geophysical devices, and as a result mass of additional removable weighting material is determined which is mounted on upper portion of engine.

EFFECT: higher trustworthiness.

4 cl, 17 dwg