Gas Injection and Shallow Super Heavy Oil Production Integrated Device

Abstract

The invention provides a gas injection and shallow super oil production integrated device,which includes tubing string and sucker rod string. Bottom of tubing string is connected with an injection and production integrated high angle pump of which bottom is connected with a chamfer tubing through a reducer union. Bottom of the chamfer tubing is connected with shoe guide plug. Flow regulator is arranged on the chamfer tubing. Bottom of anti-corrosion and anti-wear rod string is connected with anti-off-screw device of which bottom is connected with anti-corrosion weighing rod of which bottom is connected with anti-off-screw device of which bottom is connected with anti-corrosion and anti-wear sucker rod string and plunger piston. The anti-off-screw device is arranged at two sides of the anti-corrosion and anti-wear sucker rod string. The device achieves throughout and spinning of immobile string, which not only reduces operation times but also avoids cooling damage caused by operation liquid for stratum during the process of spinning operation. Moreover, the device ensures throughout and spinning effect and meanwhile significantly reduces costs of gas injection and oil production.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to an integrated device for injection and production of thin and shallow ultra-heavy oil. Background technique [0002] In recent years, the development of super-heavy oil has attracted more and more attention from the petroleum industry, and my country has made remarkable progress in the development of super-heavy oil. Conventional heavy oil steam huff and puff production needs to inject a certain amount of steam into the oil layer to reduce the viscosity of crude oil, and at the same time minimize heat loss during steam injection. [0003] For thin and shallow ultra-heavy oil reservoirs, in addition to reducing the viscosity of the crude oil and increasing the fluidity of the heavy oil, due to the shallow burial of the oil layer, the formation pressure is low, and the driving force for the flow of crude oil in the oil layer is small, it is also necessary to supplement...

AI Technical Summary

Problems solved by technology

At the same time, due to the extremely high viscosity of crude oil, the oil layer is buried shallowly, the heat is lost quickly, and the turnover is particularly frequent.

[0004] The disadvantages of the existing injection-production integrated device are: 1. All steam injection strings use high-vacuum heat-insulated oil pipes. When the cycle is frequent, the service life of the heat-insulated pipes is shortened, resulting in high steam injection costs; 2. High-vacuum insulation The thermal oil pipe cooperates with the packer for wellbore insulation, which cannot fully utilize the heat insulation effect of nitrogen for wellbore insulation; 3. The existing integrated injection-production pump is affected by the depth of the pump and the diameter of the pump, which cannot meet the requirements of the thermal recovery horizontal well. 4. After the steam injection is completed, the heat-insulated pipe must be pulled out and then lowered into the oil production string for production. There are many disadvantages: first, the pumping cannot be switched as soon as possible after the spraying, which shortens the peak oil production period; second, During the operation process, such processes as well washing and well killing are likely to cause cold damage to the oil layer; third, the cycle-changing operation requires a large amount of construction and high operating costs; fourth, it affects the production time rate of the oil well

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