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An integral layered filling device

A filling device and integral technology, which is applied in the field of integral layered filling devices, can solve the problems that single-layer filling tools cannot be filled in layers and are difficult to move, and achieve the effects of avoiding sand settlement, overcoming connection difficulties, and improving operation efficiency.

Active Publication Date: 2018-12-07
丰县飞洋金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an integral layered filling device for the above-mentioned defects in the prior art, which solves the problem that the single-layer filling tool cannot be filled in layers, and also overcomes the problems of the existing design of the inner filling string and the outer filling. There is a problem that the filling string has difficulty in moving, and at the same time, the ground filling and ring filling of the oil separation layer are realized, which improves the efficiency

Method used

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Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1, with reference to attached figure 1 , an integral layered filling device mentioned in the present invention, its technical solution is: mainly composed of two groups of filling tools 10, sand filter pipe 28, flushing pipe 30 and packer 7, the inner cavity of the filling tool 10 It is connected by flushing pipe 30, and the outer wall is connected by sand filter pipe 28. The upper part of each group of filling tools 10 is provided with a packer 7, and the bottom of the bottom group of filling tools 10 is provided with a blind plug 27. Each group of filling tools 10 is provided with In the corresponding oil layer filling position; wherein, the filling tool 10 includes the lower joint 3 of the filling tool, the sealing sliding sleeve 4, the layered water distribution joint 5, the upper joint 6 of the filling tool, the core tube 11 and the ball seat 12, and the filling The upper joint 6 of the tool and the lower joint 3 of the filling tool are connected with a la...

Embodiment 2

[0041] Embodiment 2, with reference to attached Figure 7 , The difference between the present invention and Embodiment 1 is that three sets of filling tools are lowered into the oil well, and the three sets of oil layers are filled in different layers. In specific operation, step three can be repeated to connect and lower the downhole three-component layered filling tool to realize the layered ground filling and ring filling of the three oil layers.

Embodiment 3

[0042] Embodiment 3, the difference between the present invention and Embodiments 1 and 2 is: the outer wall of the lower part of the inner tube 14 of the present invention is provided with a plurality of snap rings 17, through the snap rings of the inner tube 14 and the next group of filling tools 10 The catcher 9 on the top of the discarding core tube 11 cooperates; the catcher 9 is provided with a plurality of groups of horse teeth buttons corresponding to the snap ring, and the snap ring adopts a circular truncated structure.

[0043] The structure of the present invention can also complete the effective connection and fixation of the hands-free core tube (11) and each group of filling tools (10), and can also play the role of Embodiment 1 or 2.

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Abstract

The invention relates to an integral layered filling device. Its technical scheme is: it is mainly composed of one or more groups of filling tools, filter sand pipes, flushing pipes and packers. The upper part of the tool is provided with a packer, and the bottom of the bottom group of filling tools is provided with blind plugs, and each group of filling tools is respectively arranged at the corresponding oil layer filling position; the beneficial effect of the present invention is: the present invention solves the problem of existing single The problem that the filling tool cannot be filled in layers also overcomes the problem of difficulty in moving the inner and outer filling strings in the existing design of the layered extrusion filling tool, and avoids the problems of switch failure and inaccurate positioning. It is easier to realize the layered ground filling and ring filling of multiple oil layers, which improves the operation efficiency and reduces the cost.

Description

technical field [0001] The invention relates to a petroleum workover tool, in particular to an integral layered filling device. Background technique [0002] Oil well sand filling is one of the urgent problems to be solved in oilfield development. The main reason for oil well sand production is that the reservoir is loose cemented sandstone. In addition, in the middle and late stages of oilfield development, long-term water injection or gas injection production will also greatly damage the reservoir framework, resulting in sand production in oil wells. The hazards of sand production in oil wells are mainly manifested in three aspects: 1. The sand buries the production layer, causing the oil well to reduce or stop production; Casing damage makes the oil well scrapped, etc. Sand production in oil wells causes a large reduction in oil well production, a sharp increase in operating costs, and serious economic losses. In order to solve the problem of sand production in oil wel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/00
CPCE21F15/00
Inventor 高瑞民
Owner 丰县飞洋金属制品有限公司
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