FIELD: exploration drilling and hydrocarbon production.
SUBSTANCE: device comprises tubular member with precut window and gate arranged at the window. Gate is covered with release material. Method for tubular member preparation for member lowering in well involves providing tubular member with window, gate adapted to close tubular member window and release material covering at least one gate part facing environment through window; installing tubular member in well; injecting hardening agent in hole annuity created around tubular member.
EFFECT: increased multilateral well construction efficiency.
29 cl, 4 dwg
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