METHOD OF DEVELOPMENT OF HYDROCARBONS /OIL AND GAS/ AND UNDERWATER DRILLING RIG FOR IMPLEMENTATION OF THIS METHOD IN ARCTIC SHELF Russian patent published in 2010 - IPC E21C50/00 

FIELD: mining.

SUBSTANCE: four independent blocks are preliminary constructed at plant or shipyard and are completed with corresponding to their design equipment by workers and engineers. Further the blocks are transported to a licensed deposit place of arctic shelf by means of ice-breakers and tugboats. In the coastal region erectors-constructors mount two auxiliary blocks, notably: a military-frontier base and medical-hotel centre, while the other two blocks are directed under their own power and are rigged in underwater conditions over the place of drilling. All blocks are connected between them with electric cables and pipelines. According to this method the underwater drilling rig is made in a pressure tight case. On both opposite boards the case is equipped with submarines with hatches and sluices for small underwater mechanisms. Also an auxiliary block is set next to the drilling block by means of anchors. The auxiliary block is similar to the drilling block by design, but inside it is equipped with facilities for preparation of drilling agent and for purifying bore mud; it is also equipped with facilities for cleaning of sewer-pipe drainages of all blocks. All blocks are connected between them with electric cables and pipelines. The underwater blocks are made in form of pressure tight cases rigidly mounted on fore body and stem of each of submarines; the said hatches and sluiced are arranged in them. The disclosed method of development facilitates improved treatment of viscous oil of shelf at mini-oil processing plant located at direct vicinity from the place of extraction, which considerably improves economic performances of deposit development.

EFFECT: upgraded safety and convenience of drilling operations in remote sparsely populated northern latitudes at development of shelf hydrocarbon deposits, considerable simplification of proper development process, reduced labour intensiveness of construction and mounting directly at place of development using existing facilities of ship-building plants for construction of such complexes at their justified updating.

3 cl, 8 dwg