Device for lowering and fishing submersible electric pump with composite coiled tubing and operation process thereof

A technology of electric submersible pump and tubing, which is applied in wellbore/well components, earthwork drilling, sealing/isolation, etc., and can solve problems affecting oil well production, long operation time, and high cost

Pending Publication Date: 2019-05-17
天津克睿特维科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This operation process takes a long time, costs high, pollutes the oil layer, and directly affects the output of the oil well after pump inspection. Therefore, it is necessary to find a pump inspection technology that can quickly inspect the pump without polluting the oil layer.

Method used

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  • Device for lowering and fishing submersible electric pump with composite coiled tubing and operation process thereof
  • Device for lowering and fishing submersible electric pump with composite coiled tubing and operation process thereof

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0032] Such as Figure 1 to Figure 2 As shown, a composite coiled tubing fishing submersible electric pump device includes the original well casing 21, the original well casing 21 is seated with a Christmas tree 20, and the inner wall of the original well casing 21 is set with a cable bridge plug 3. There is a slanted guide shoe 1 under the cable bridge plug 3, a safety valve 2 is connected between the cable bridge plug 3 and the slanted guide shoe 1, and a tool string is provided above the cable bridge plug 3. The tool string is provided with a safety valve forced opening tool 4, a perforated pipe 5, a motor 6, a pump 9, and a hydraulic / electric bridge channel 11 connected in sequence from bottom to top, and the hydraulic / electric bridge channel 11 is connected with the original well casing A packer 10 is provided between the inner walls of the pipes 21, a ...

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PUM

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Abstract

The invention relates to a device for lowering and fishing a submersible electric pump with composite coiled tubing and an operation process thereof. The device comprises an original well casing; a Christmas tree is set on the original well casing; a cable bridge plug is set on the inner wall of the original well casing; a safety valve and a mule guide shoe are arranged under the cable bridge plug; a safety valve strong opening tool, a perforated tube, a motor, a pump, a liquid / electric bridge channel are arranged above the cable bridge plug; a packer is arranged between the liquid / electric bridge channel and the original well casing; a downhole safety valve and the composite coiled tubing are connected with the top of the liquid / electric bridge channel; a power cable in the composite coiled tubing is connected with the motor, a fluid control pipeline and the downhole safety valve; a composite coiled tubing suspension device is connected with the top of the composite coiled tubing; a raised flange is arranged at the bottom of the Christmas tree; the composite coiled tubing suspension device is set in the raised flange; a cable plug is connected with the composite coiled tubing suspension device. The operation process comprises the preceding process, a pump lowering process and the pump lifting process. The device and the operation process thereof provided by the invention havethe beneficial effects that the pump can be inspected quickly, and an oil layer is not polluted.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation in the petroleum industry, in particular to a device for a composite coiled tubing electric submersible pump and an operating process thereof. Background technique [0002] The existing electric submersible pump oil recovery technology usually utilizes oil pipes of more than nine meters each to transport the unit to the well. The oil pipes are connected with threads one by one, and the lower part of the oil pipes is connected to the electric submersible pump unit. The power cable is fixed on the outer wall of the oil pipes and goes down along with the oil pipes. The unit lifts the formation fluid and flows through the inner cavity of the oil pipes to the ground. [0003] When the unit fails or the power cable fails, before the oil pipe is lifted, it is necessary to use the well killing equipment to pump the well killing fluid into the wellbore to press the formation to prevent the formation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/00E21B23/14E21B33/04E21B33/12
Inventor 吕中芳
Owner 天津克睿特维科技发展有限公司
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