FIELD: soil or rock drilling.
SUBSTANCE: invention relates to the field of drilling equipment and can be used in assembly of a drill string intended for drilling of hollow-inclined and horizontal sections of wells. Drill pipe with centralizers comprises housing and connecting elements, at that on metal housing of drill pipe there are round tubular centralizers with ribs, on which eccentric hollow container with metal balls inside is fixed.
EFFECT: reduction of forces of column resistance to longitudinal movement in horizontal shaft and provision of driving of more extended wells with horizontal termination.
1 cl, 1 dwg
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