Single pipe co-well oil-pumping and water-injecting technological system

Abstract

The invention discloses a pumping injection technology system with a single tube and the same well, which comprises a packer and an inserting and sealing, moveable connectors for connecting an oil tube and an electric pump assembly, a steel pipe with big path for an electric pump with high flow rate to establish a water sampling channel, and the electric pump with high flow rate is coated in the steel pipe with big path, and the water sampling channel passes through from the steel pipe with big path, injected water passes from the outer side of the steel pipe with big path, the lower entering of the electric pump with high flow rate is achieved, the injected water passes through from the center of the lower end of the steel pipe with big path, water which is sampled passes through from the outer to achieve a purpose of sampling the upper layer to inject the lower layer, the channel for sampling water is opposite to a water injecting and sampling channel of the steel pipe with big path. A change-over and shunt device is arranged on the positioning packer to achieve the purpose of overlap changeover of the water injecting and sampling channel, the lower end of a bridge type channel of the change-over and shunt device is communicated with a water sampling layer, and the lower end of a core tube is connected with an oil tube which leads to an water injection layer, boundary surfaces of the water injection layer system and the water sampling layer system are provided with the layer separating packer and the inserting and sealing, thereby the channel is divided.

Description

technical field [0001] The invention relates to an oilfield water injection and production system, in particular to a same-well pumping and injection process system. Background technique [0002] At present, the same-well pumping and injection process used in the oilfield water injection and production system adopts a double string structure. In this system, the water injection string and the water production string are lowered into the well side by side. Due to the limitation of space, the double-string same-well pumping and injection process system can only be installed with a small-displacement electric submersible pump, which cannot meet the needs of large-displacement water production. The disadvantages of the existing technology are: because only Electric submersible pumps with small displacement can be used, so the problem of insufficient water supply in the water source well will affect production. In order to meet the needs of oilfield water injection to stabilize ...

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Problems solved by technology

[0002] At present, the same-well pumping and injection technology used in the oilfield water injection and production system adopts a double string structure. Due to the limitation of space, the double-string same-well pumping and injection process system can only be installed with a small-displacement electric submersible pump, which cannot meet the needs of large-displacement water production. The shortcomings of the existing technology are: because only A small displacement electric submersible pump can be used, so the problem of insufficient water supply in the water source well will affect production

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