FIELD: well drilling, particularly to align telemetering systems, which control parameters during well drilling, and other downhole equipment in drill string.
SUBSTANCE: centralizer comprises body with ribs and support members. Number of support members is equal to number of ribs and support members may be moved in radial direction and made as levers. Each lever has two links, which are articulated with each other. The support members are hinged to holders retained in longitudinal slots made in inner ring surfaces. The rings are concentrically installed on centrator body. Upper ring is fixed to body, another one is spring-loaded and may perform axial movement. Slots are created between centrator ribs. Slots limit radial holder displacement and guide lower ring holder along centrator axis.
EFFECT: increased reliability, reduced transversal dimensions, increased aligning accuracy and possibility to regulate centering force acting on support centrator members, improved connection reliability and downhole equipment air-tightness.
5 cl, 4 dwg
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