Hermetic electric submersible pump production completion system capable of proceeding steel wire operation

Abstract

The present invention relates to a closed electric submersible pump production well completion system which can process for steel wire operation. The closed electric submersible pump production well completion system comprises a production plug-in head, a closed electric submersible pump assembly, a blanking plug, a ball cup short section, etc. The closed electric submersible pump assembly comprises an air guide sleeve, a guide head, an oil pipe, an electric submersible pump set and a closed electric submersible pump hanger assembly. The closed electric submersible pump hanger assembly is an integral structure. A lower main pipe and a lower lateral pipe are arranged in the closed electric submersible pump hanger assembly and are extended into the air guide sleeve. The lower lateral pipe is connected with the electric submersible pump set. The lower main pipe is connected with the guide head and forms a column jacket steel wire operating passage. The closed electric submersible pump hanger assembly is connected with a full bore reverse circulation sub. The closed electric submersible pump production well completion system has the advantages that the steel wire operation and the production test can be processed in a column jacket during the production period; the closed electric submersible pump production well completion system is fit for the multi-completion and the selection completion of multiple producing formations; the system is matched with an oil layer protection valve to be used, thereby not only being capable of realizing the closed electric submersible pump production but also being capable of reducing the pollution to an oil layer during the well completion and workover period and improving the oil well productivity.

Description

technical field [0001] The invention belongs to the technical field of oilfield well completion, and in particular relates to a closed electric submersible pump production and completion system for oilfield well completion and well workover production that can perform steel wire operations. Background technique [0002] In the known drilling and completion operations, oil field production mostly adopts open production and completion systems. In order to ensure downhole safety during production, the conventional well completion production string should be equipped with a cable packer. During running in and out of the production string, in order to balance the formation pore pressure and prevent overflow, the The completion fluid is poured into the wellbore, and the completion fluid leaked into the reservoir will not only pollute the reservoir, but also increase the cost of completion. If the completion fluid injection is not timely, it may also lead to overflow or even blowo...

AI Technical Summary

Problems solved by technology

At present, the closed production and completion systems have been developed successively at home and abroad. However, due to the single-channel structure of the aforementioned closed production and completion systems, slickline operations cannot be performed. If you want to perform slickline operations, you need to first lift the production string out of the wellbore In order to pull out the production string, keep the production string clean and safely pull out the production string, it is necessary to perform reverse circulation well cleaning and well killing operations. Open the oil drain valve for reverse circulation flushing, but it is difficult to open the oil drain valve by this method for oil wells with a large well deviation or full angle change rate, so the above tools are difficult to implement

In addition, because the Y joint of the traditional production and completion system does not have other operating functions, when it is necessary to inject chemicals into the production string, it must be realized by installing other special tools, which is cumbersome to operate, long in operation time and low in work efficiency; The closed production and completion system does not have associated gas release channels, and the associated gas generated during the production process cannot be discharged from the wellbore. The anti-airlock performance of the electric submersible pump used is very high, and it is not suitable for wells with high gas-oil ratio.

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