Thickened oil horizontal well injection and recovery integrated process pipe rod column and method

Abstract

The invention discloses a thickened oil horizontal well injection and recovery integrated process pipe rod column and a method. The process pipe rod column comprises a pipe column body, a rod column body, a horizontal injection and recovery pump and a well head suspension device; the rod column body is a gravity weighed rod column body arranged inside the pipe column body; the lower ends of the pipe column body and the rod column body are simultaneously connected with the horizontal injection and recovery pump; and the upper ends of the pipe column body and the rod column body are simultaneously connected with the well head suspension device. The horizontal injection and recovery pump is a hydraulic power assisted type horizontal injection and recovery pump, and the gravity weighed rod column body is a gravity weighed rod used in a straight well section. Injection and recovery integration of the horizontal pump can be achieved, the depth of pump lowering can be increased, the production period is prolonged, rotating cycle working procedures can be simplified, the rotating cycle cost is saved, and the heat loss is reduced.

Description

technical field [0001] The invention relates to a heavy oil injection-production integrated pipe string, in particular to a thick oil horizontal well injection-production integrated process pipe string and method. Background technique [0002] As oilfield development enters the middle and later stages, the number of heavy oil horizontal wells continues to increase. At present, most of these wells are produced by steam huff and puff. During the turnaround operation, it is necessary to start the production string of the original well, lower the steam injection string, start the steam injection string, and lower the production string. Such two operations are too cumbersome, which increases the construction cost and also increases the heat loss. Although the conventional integrated injection-production technology can simplify the turnaround process and turn the pump quickly, the depth of the lower pump is limited, and it is difficult to lower the pump into the horizontal section...

AI Technical Summary

Problems solved by technology

During the turnaround operation, it is necessary to start the production string of the original well, lower the steam injection string, start the steam injection string, and lower the production string. Such two operations are too cumbersome, which increases the construction cost and also increases the heat loss.

Although the conventional integrated injection-production technology can simplify the turnaround process and turn the pump quickly, the depth of the lower pump is limited, and it is difficult to lower the pump into the horizontal section. As the liquid level drops in the later stage of production, the subsidence degree decreases. Reduced production, or even shutdown

[0003] After searching, in the field of heavy oil injection-production integrated pipe-rod string technology, no combination method like this application has been found so far.

Images