FIELD: mining.
SUBSTANCE: drilling mud is circulated by forcing it through drill string with adapter mounted at the start of horizontal section and including hollow case with radial channels made in said case to 30-60 degrees to its axis. Drill mud flow in said adapter in divided into two parts. One part of said flow is ejected via radial channels as a turbulent flow to force slime particles to the well vertical section while another part is fed as a laminar flow to the well horizontal section.
EFFECT: higher quality of cleanup.
2 dwg
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