SELF-LIFTING DRILLING RIG Russian patent published in 2014 - IPC E21B15/02 

FIELD: mining.

SUBSTANCE: self-lifting drilling rig includes supports made in the form of shaped structures, two of which are made in the form of single supports equipped with ice deflectors, and one support is made of two parallel supports located at some distance from each other and fixed on a riser base and is equipped with a riser ice deflector. A drilling zone passing through the support made of two parallel supports located at some distance from each other is equipped with drill strings. Ice deflectors and the riser ice deflector, which have positive buoyancy due to ballast tanks built into them, are installed with a possibility of sliding along single supports and the support made of two parallel supports located at some distance from each other and with a possibility of being fixed on them. The riser ice deflector is provided with a movable protective plate with holes for drill strings, which can be slid along the support made of two parallel supports located at some distance from each other so that a closed air cavity is formed around the drill strings on a water line level for supply into it for example of steam from the housing for example via a flexible pipeline for protection of the drill strings against ice formation during ice influence periods.

EFFECT: drilling rig is arranged on a housing in the centre of the support having two parallel supports located at some distance from each other with possibility of being moved between drill strings to increase the range of possible operation depths.

6 dwg