Hermetic, circular, heating and energy saving process and device for extracting super thick oil by saturated vapor in hollow rod

Abstract

The invention relates to a hermetic, circular, heating and energy saving process and a device for extracting super thick oil by saturated vapor in a hollow rod. The process comprises the steps that vapor is filled into a pit shaft part from a ground part of the device and then returns to the ground part; the vapor hermetically circulates in such a way and heats the super thick oil in a pipe to 70-150 DEG C; and the viscosity-reduced super thick oil is extracted out of the ground by a deep-well pump. The device comprises an input pipe, an output pipe, a heating furnace, a multi-stage centrifugal pump and a pressure buffer tank which are sequentially connected to a four-way of the ground part, a beam hanger which is connected to the upper end and a hollow oil pumping rod and an oil extraction tree which are connected and arranged at the lower end. The pit shaft part comprises a sleeve which is connected with the oil extraction tree and an oil pipe, the hollow oil pumping rod, a continuous inner pipe and the deep-well pump which are sequentially arranged in the sleeve, wherein the deep-well pump is connected with the lower parts of the hollow oil pumping rod and the oil pipe. The device adopts a high-temperature resistant steel-skeleton non-metal continuous soft pipe and a vapor high-temperature heating technology, has the characteristics of large heat load, high heating temperature and obvious energy-saving effect and is mainly applied to the extraction process of thick oil and the super thick oil.

Description

1. Technical field [0001] The invention relates to a wellbore heating process technology in the heavy oil recovery process of super oilfields, in particular to an energy-saving oil recovery process and device for super heavy oil hollow rod saturated steam closed circulation heating and oil recovery technology. 2. Background technology [0002] The hot water circulating heating technology for hollow rod pumping has successfully replaced the electric heating technology in the production of ordinary heavy oil and high pour point oil, realized the heating of the output fluid temperature to about 60 ℃, and the daily power saving of a single well reached 800kwh, which achieved A better energy-saving effect. However, for ultra-heavy oil with a viscosity above 200,000 m.pas, the temperature rheology point is above 95°C, and the temperature of the oil well output fluid must be heated above 95°C to produce normally. The hollow rod hot water circulation heating technology obviously ca...

AI Technical Summary

Problems solved by technology

Hollow rod hot water circulation heating technology obviously cannot meet the development needs of super heavy oil

However, if electric heating is used for production, the daily power consumption of a single well is about 1800-2000kwh, which has high energy consumption and high cost, which greatly limits the application and development of this method.

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