Bailer type thick oil continuous exploiting device and operating method thereof

Abstract

The invention discloses a bailer type thick oil continuous exploiting device and an operating method thereof. The bailer type thick oil continuous exploiting device comprises an electromotor, a frame and a Christmas tree. A shield is fixed on the frame; an oil drainage outlet is arranged at the lower part of the shield; the lower end of the shield is connected with the Christmas tree; the lower end of the Christmas tree is connected with an oil-string casing; an oil pipe is arranged in the oil-string casing; a shaft bottom guide wheel is arranged below the oil pipe; a lifting wheel is arranged in the shield; a rope chain is wound between the lifting wheel and the shaft bottom guide wheel; and a plurality of bailers are hung on the rope chain. The invention adopts the bailers to exploit the thick oil and makes use of the design of the internal structure of the oil-string casing as well as the suspension arrangement of the bailers on the rope chain, so as long as the formation temperature and the pressure are high enough to drive the thick oil to enter the shaft, the thick oil can be loaded into the bailers to be lifted to the ground. The invention avoids the viscosity reducing treatment to the thick oil at the bottom of the shaft in the conventional thick oil exploiting process, simplifies the thick oil exploiting process, reduces the consumption of energy and chemicals and finally reduces the thick oil exploiting cost.

Description

technical field [0001] The invention relates to a heavy oil collection device, in particular to a dredge-type heavy oil continuous mining device and an operating method thereof. Background technique [0002] Crude oil with high viscosity and high specific gravity is called heavy oil. Due to its high flow resistance, it is very difficult for heavy oil to flow into the wellbore from the oil layer or lift from the wellbore to the ground. [0003] At present, the methods of mining heavy oil in various countries in the world can be divided into two categories: thermal recovery and cold recovery. Thermal recovery methods include steam huff and puff, steam flooding, SGD, thermal miscible flooding, thermal fluid circulation, electric heating (heating boom, cable heating, electric heating tubing, electromagnetic heating) microwave, thermochemical, fire, etc.; cold recovery methods include pump Pumping, bottom water with oil, chemical viscosity reduction, oil-based viscosity reductio...

AI Technical Summary

Problems solved by technology

The essence of these methods is to reduce the viscosity of heavy oil at the bottom of the well, so that it can be produced on the ground through tubing, so a lot of energy or medicines are consumed in the process of modifying the physical properties of heavy oil, especially when the viscosity of crude oil is extremely high , the cost of viscosity reduction is too high, even making heavy oil production unprofitable

Images