Open heat tracing circulation system for oil wells and operation method thereof

Abstract

The invention relates to the field of oil-well production, in particular to an open heat tracing circulation system for continuous insulated pipe of rod pumped wells and electric pump wells in high pour point oil and heavy oil reservoirs and an operation method thereof. The open heat tracing circulation system comprises a circulating heat tracing mining system and an oil return gathering and transportation system, wherein two ends of the circulating heat tracing mining system is connected with two ends of the oil return gathering and transportation system in series, the circulating heat tracing mining system comprises an insulated pipe, a water segregator and an oil-water mixture outlet and the water segregator is connected with the insulated pipe through a thread. The open heat tracing circulation system for the oil wells can be widely applied in water heat tracing mining technologies of the high pour point oil and the heavy oil reservoirs, and a big cost of current electric heat tracing mining can be reduced.

Description

technical field [0001] The invention relates to the field of oil well exploitation, in particular to an open-type heat-tracing circulation system of continuous heat-insulated tubes for pumping wells and electric pump wells in high pour point oil and heavy oil reservoirs and an operating method thereof. Background technique [0002] At present, during the development of high pour point oil and heavy oil reservoirs, downhole heat tracing is required, that is to use hot water downhole circulation heat tracing to recover crude oil. In the prior art, the downhole water-mixed heat tracing is an independent closed circulation of double casings, which cannot be mixed with the downhole output fluid to enter the surface oil return gathering and transportation system. The main reason is that multiple downhole pipe strings cannot pass through the pipe wall in a directional manner without backflow, resulting in various and complicated ground equipment for this production process, and the...

AI Technical Summary

Problems solved by technology

The main reason is that multiple downhole pipe strings cannot pass through the pipe wall in a directional manner without backflow, resulting in various and complicated ground equipment for this production process, and there are many potential safety hazards.

Images