RU2003115407A - METHOD FOR DEVELOPING VISCOUS OIL AND BITUMEN DEPOSITS - Google Patents

Claims (5)

1. A method of developing deposits of viscous oils and bitumen, including drilling a horizontal wellbore from two wellheads, fastening it with a production string, dragged from one wellhead along the barrel to another together with packers for installing the latter in the roof of the productive formation, perforation of the production string in the productive zone formation and subsequent lifting and supply of oil to the flow line at one of the wellheads, characterized in that the wellhead sections of the production string are interconnected by ground a drain in the form of an arcuate pipeline with an identical inner diameter to form a closed channel, the above-ground portion of which is fixed on the support frame of the drive unit, after which an additional string is installed in the production string, which acts as a tubing in the underground part and has perforation channels for communication with a productive layer, in the cavity of the additional column at equidistant distances from each other, a system of cylindrical elements connected between each other by means of power rods with the formation of a closed traction system, while sections of the underground part of the tubing from the wellhead to the boundaries of the perforation section of the production string together with the aforementioned cylindrical elements form piston pump pairs, and during operation, the system of cylindrical elements is forcedly moved with using a drive unit with continuous sequential displacement of oil from the tubing by means of utyh above pump piston pairs. 2. The method according to claim 1, characterized in that the length of the power traction between adjacent cylindrical elements is set equal to or less than the length of the tubing section from the top of the formation to the wellhead. 3. The method according to claim 1, characterized in that during the operation of the well when supplying solvent and / or coolant through the mouth opposite to the flow, change the direction of movement of the traction system. 4. The method according to claim 1, characterized in that at least one annular packer is installed in the production casing in the zone of the reservoir, and the adjacent tubing section together with the cylindrical elements forms at least one piston pumping pair. 5. The method according to claim 1, characterized in that after the cessation of operation, the underground sections of the columns are cut into two parts and removed through the wellhead, after which cement bridges are installed to prevent the technological consequences of development.