THERMAL STIMULATOR FOR HEAVY AND BITUMINOUS OIL RESERVOIR Russian patent published in 2010 - IPC E21B43/24 

FIELD: oil and gas production.

SUBSTANCE: stimulator accommodates a wellhead, a pipe string with a packer mounted above a reservoir, and a lift valve at the bottom, an auxiliary pipe string equipped with centering skids and laterals at the bottom, concentrically inserted into the pipe string, sealed at the bottom above the laterals and interacting with the lift valve. According to the invention, over the hermetic sealing, the auxiliary pipe string has a ring restrictor for an inserted plunger pump to be lowered on the pump rods in the auxiliary string and tightly mounted in the ring restrictor after injection of the heat-carrier is completed. The auxiliary pipe string is equipped with a valve unit covering the laterals of the auxiliary pipe string and opening it when interacting with the lift valve.

EFFECT: enhancement of the device due to combination of repeating injection of the heat-carrier in the reservoir with withdrawal of the heated heavy and bituminous oil from the reservoir of the greater coverage radius.

2 dwg