DRILLING UNIT WITH CLOSED COILED PIPE Russian patent published in 2012 - IPC E21B19/22 

FIELD: oil and gas industry.

SUBSTANCE: unit with closed coiled pipe includes movable trailer; coiled pipe assembly connected to movable trailer with possibility of being detached and containing drum of coiled pipe, which is connected to injector of coiled pipe; at that, drum and injector are fixed relative to each other and move together relative to movable trailer as whole entity; and casing enclosing the coiled pipe assembly in order to maintain temperature. Method of well shaft introduction to underground formation involves movement of coiled pipe assembly inside casing to the first position, and then introduction of equipment of drilling column bottom (BHA) to well shaft using lifting system, when coiled pipe assembly is in the first position; at that, coiled pipe assembly and at least one section of lifting are enclosed inside the casing. Besides, coiled pipe assembly includes coiled pipe, drum of coiled pipe and injector of coiled pipe; besides, drum of coiled pipe and injector of coiled pipe are fixed relative to each other and move together as whole entity; movement of coiled pipe assembly inside casing to the second position and then connection of coiled pipe to BHA and introduction of BHA to well shaft when assembly of coiled pipe is in the second position.

EFFECT: drilling efficiency, protection of inner space of drilling unit against external factors.

17 cl, 7 dwg