FIELD: mining of minerals in areas covered with water. SUBSTANCE: drilling rig includes supporting pontoons, drilling platform and struts connecting them; drilling platform is floating. Drilling platform and pontoon portion are detachable for independent motion over hard surface and in water. Joint of platform and pontoon is shifted towards platform. Pontoon portion is sectional for independent motion. EFFECT: possibility to use drilling rig at any depth, in water basins covered with ice and on land. 2 cl, 2 dwg
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