Well completion system of coiled tubing electric submersible pump

A technology of electric submersible pump and coiled tubing, which is applied in the direction of drilling pipe, casing, drilling equipment, etc., can solve the problems of domestic application and achieve the effect of solving high operating costs

Inactive Publication Date: 2019-01-25
天津大泛华石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the development of the coiled tubing process itself, there are basically no domestic applications

Method used

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  • Well completion system of coiled tubing electric submersible pump

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Embodiment Construction

[0014] The invention will be further technically explained below with reference to the drawings and embodiments.

[0015] Such as figure 1 As shown, a coiled tubing electric submersible pump completion system includes a large diameter Christmas tree 11 deployed on the well and a downhole production casing 1; the top of the large diameter Christmas tree 11 is provided with a sealing device 10; An inner casing 2 is deployed in the production casing 1, an electric submersible pump unit 16 is arranged in the inner casing 2, a production packer 15 is installed on the top of the electric submersible pump unit 16, and the bottom end of the oil outlet channel 14 penetrates The production packer 15 is connected to the electric submersible pump unit 16, the top of the oil outlet channel 14 is connected to the large diameter Christmas tree 11 through the coiled tubing 12; the bottom of the inner casing 2 is connected to the downhole safety valve 5 through the circulating sliding sleeve 4; ...

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Abstract

The invention discloses a well completion system of a coiled tubing electric submersible pump. The system comprises a large-drift-diameter production tree disposed above a well and a production casingdisposed under the well. The interior of the production casing is provided with an inner layer casing pipe. The inner layer casing pipe is internally provided with an electric submersible pump unit.The top of the electric submersible pump unit is provided with a production packer. The bottom end of an oil outlet channel passes through the production packer and is connected with the electric submersible pump unit. The top end of the oil outlet channel is connected with the large-drift-diameter production tree through a coiled tubing cable. The bottom of the inner layer casing pipe is connected with a subsurface safety valve through a circulating sliding sleeve. The coiled tubing cable is a complex body of which the interior is integrated with three electric submersible pump power cable cores and two liquid control tube lines in 1/4 of an inch and an insulation filling material. The cable is connected with a ground power system. The production casing is internally further provided withthe liquid control tube line. The bottom end of the liquid control tube line is connected with the subsurface safety valve. The top end of the liquid control tube line is connected with the large-drift-diameter production tree. The well completion system of the coiled tubing electric submersible pump is capable of solving problems in oilfield development that submersible pump inspection operatingcost is high and efficiency is low.

Description

Technical field [0001] The invention relates to a well completion system, in particular to a coiled tubing electric submersible pump completion system. Background technique [0002] At present, the completion technology combining coiled tubing and electric submersible pump has been launched since the 1990s. This completion technology adopts mature coiled tubing operation method, combined with electric submersible pump lifting method, and is used in remote areas Reflects the cost advantage of this process. However, due to the development of coiled tubing technology itself, there is basically no domestic application. [0003] Therefore, on the basis of the coiled tubing electric submersible pump completion process, the conventional coiled tubing is built into the tubing cable to solve the problem of the connection between the production channel and the tubing cable, so as to change the completion process and change the traditional This mode achieves the advantages of coiled tubing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03E21B33/04E21B17/00E21B33/122E21B34/06
CPCE21B33/03E21B17/00E21B33/0407E21B33/0422E21B33/122E21B34/06
Inventor 王津川
Owner 天津大泛华石油科技有限公司
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