CHAIN-LINE PIPE-LAY FROM FLOATING SYSTEM OF OIL PRODUCTION Russian patent published in 2009 - IPC F16L1/14 F16L1/16 E21B43/13 B63B35/03 

FIELD: oil and gas production.

SUBSTANCE: sections of pipes (52, 54) are connected successively and are supported vertically relative to floating vessel (12) to assemble section of column (68B-68D); this section is immersed into sea so, that nearest end (56) of section rests on floating vessel. Towboat (30) stretches out the section of the column along a doubled chain line by means of hauling in towing cable (34) connected with further end (65) of the column. When further end of the column is situated near one of the borehole of underwater wells of the oil deposit, this end is transported for connecting it to the borehole using a transport vessel with remote control. During assembly tension in the pipe column is maintained at a required level by facilitating location of the section of the nearest end of the column, which is below floating vessel (12), so, that the column is stretched at angle (70) to vertical, which continuously stays within the preliminary set interval from 3° to 12°.

EFFECT: invention facilitates pipe-lay avoiding damage of pipe sections and simultaneously reduces operational costs.

8 cl, 5 dwg