Wellbore wax and sand control tubular column used for oil field oil extraction

Abstract

The invention provides a wellbore wax and sand control tubular column used for oil field oil extraction and relates to the technical field of oil extraction equipment in the oil field development andproduction process. The tubular column comprises an oil extraction tube structure and a sleeve, and further comprises circular hot pack pipelines, external circulating channels and oil well pump circulating channels. The circular hot pack pipelines comprise the first circular hot pack pipeline, the second circular hot pack pipeline and the third circular hot pack pipeline. The external circulatingchannels comprise the first external circulating channel, the second external circulating channel and the third external circulating channel. The oil well pump circulating channels comprise the firstoil well pump circulating channel, the pump tail pipe and the second oil well pump circulating channel. According to the wellbore wax and sand control tubular column provided by the invention, driving circulation is established by means of hot water of prior ground gathering and conveying pipelines of an oil field, and wax in an annular space in a wellbore and on the pipe wall is removed.

Description

technical field [0001] The invention relates to the technical field of lifting during oilfield development and production and processing and conveying of ground sludge oil slurry, in particular to a wellbore wax and sand prevention pipe string for oilfield oil production. Background technique [0002] The existing wellbore strings all use downhole injection of chemical anti-wax agent and anti-scaling agent, which has the problems of difficult oil-water separation, environmental pollution, corrosion of tubing and casing, large investment, and high cost. During the lifting process, the viscous resistance is large, which makes the waxed pipe stuck in the oil pipe unable to flow, and the lifting and transportation of crude oil cannot meet the development needs. [0003] At present, after the pre-jamming, the pipe string cannot be washed circularly, and the operation cost of lifting the pipe is high, and the safety risk is high. Due to the long-term exploitation of the oil reserv...

AI Technical Summary

Problems solved by technology

[0002] The existing wellbore strings all use downhole injection of chemical anti-wax agent and anti-scaling agent, which has the problems of difficult oil-water separation, environmental pollution, corrosion of tubing and casing, large investment, and high cost. During the lifting process, the viscous resistance is large, which makes the waxed pipe stuck in the oil pipe unable to flow, and the lifting and transportation of crude oil cannot meet the development needs

[0003] At present, after the pre-jamming, the pipe string cannot be washed circularly, and the operation cost of lifting the pipe is high, and the safety risk is high. Due to the long-term exploitation of the oil reservoir, the sand body cement is loose, and the sand production is serious. The number of sand stuck wells is increasing year by year, which affects the production of oil wells.

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