Well completion production pipe string capable of mining at lower part and injecting at upper part and with electric submersible pump

Abstract

The invention discloses a well completion production pipe string capable of mining at the lower part and injecting at the upper part and with an electric submersible pump. The well completion production pipe string comprises a bushing capable of mining at the lower part and well injecting at the upper part, an oil pipe arranged in the bushing and a downhole tool arranged on the oil pipe. The downhole tool comprises a downhole safety valve arranged at the upper part of the oil pipe and connected with a hydraulic control pipeline and a bushing layering packer arranged at the bottom of the oil pipe and provided with a sealing barrel. The bushing layering packer is provided with a positioning sealing part in a matched mode. An over-cable production packer with an air releasing valve, a workingbarrel and a sealed electric submersible pump system are connected between the downhole safety valve and the positioning sealing part in sequence from top to bottom. An upper reservoir and a lower reservoir of the bushing are separated through the bushing layering packer. A positioning sealing guiding shoe is arranged at the lower end part of the oil pipe. According to the well completion production pipe string, the facts that precise water injecting of the upper reservoir is achieved through an annulus access and pumping production or precise water injecting of the lower reservoir is achieved through a sealing system and a channel in the oil pipe are achieved, and the annulus access and the channel in the oil pipe are independent and noninteracting, so that the upper reservoir and the lower reservoir of one well are controlled independently, and the cost of oilfield development and maintenance is reduced.

Description

technical field [0001] The invention relates to a downhole production string, more specifically, relates to a production string with a submersible electric pump for downhole production and upper injection well completion. Background technique [0002] At present, offshore oilfields mostly use jackets to drill cluster wells for development. Due to the limitation of platform space, the number of well slots that can be arranged on each platform is limited. The number of slots used to drill the production well. [0003] For multi-layer reservoirs that need to design water injection wells and oil production wells at the same time, multi-set well patterns are usually used for layered development, which leads to high investment costs and great difficulty in development. [0004] For multi-layer water injection wells, general water injection can no longer meet the requirements of reservoirs, and the water injection volume of a single layer of water injection layer needs to be preci...

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Problems solved by technology

[0003] For multi-layer reservoirs that need to design water injection wells and production wells at the same time, multi-set well patterns are usually used for layered development, which leads to high investment costs and difficult development

[0004] For multi-layer water injection wells, general water injection can no longer meet the requirements of reservoirs, and the water injection volume of a single layer of water injection layer needs to be precisely controlled

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