FIELD: oil and gas industry.
SUBSTANCE: suggested group of inventions is related to downhole tools and may be used for actuation of anchors of the well liners. The anchor bend includes a non-deformable cylindrical anchor former, an expandable metal bushing movable along the external surface of the anchor former and a cylinder-shaped sub. At that the cylinder-shaped sub is supported by the external surface of the anchor former for the purpose of its axial movement from the first position which is the closest position to the bushing in axial direction to the second position under the bushing so that in result of the above sub movement the bushing can be expanded outside in radial direction.
EFFECT: improving reliability of torque transfer through sectional tubes and other driving shafts without damage of threaded connections.
47 cl, 20 dwg
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