FIELD: mining and well construction, particularly means for drilling string support and centering.
SUBSTANCE: centrator comprises body provided with linear movement limiters, which restrict body travel. Body cavities may be filled with flushing liquid via channels. The cavities are radially arranged in body ends. The body is formed of elastic material. Channels extend along helix line and connect pair of diagonally spaced cavities. The limiters are made as plates with rounded ends and installed on the body between clamps fixedly connected to drilling string.
EFFECT: simplified structure and improved service characteristics.
2 cl, 4 dwg
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