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Interlayer anti-channeling completion device
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Interlayer anti-channeling completion device

Product description

Interlayer anti-channeling completion device

Product description


In the process of oilfield exploitation, it is often encountered that the interlayer between the oil layer and the water layer is relatively thin, and some of the interlayers are only 1-3m thick. It is difficult for conventional cementing to form a dense, long-term interlayer seal at the thin interlayer After a period of production, it is easy to cause channeling outside the pipe, and the situation of thermal recovery wells is even more serious.

Although the conventional cementing process uses a certain amount of expansion agent in the cement slurry, it is difficult to ensure long-term and good cementing effects, especially at the second interface, the interface relationship between the formation, mud cake, and cement It is very complicated, and it is difficult to form a long-term effective seal under the condition of a thin barrier.

At present, the conventional thin-bed cementing method is to use an outer tube packer to seal at the thin layer between the oil layer and the water layer. However, most of the sites generally use the extra-fluid pack technology. Over time, the seal of the outer tube packer will rapidly age and break under the harsh conditions of the well, and the swelling and sealing liquid will flow out of the cartridge, resulting in the failure of the outer tube packer and causing channeling between the oil and water layers.

In response to this problem, we have designed and developed a high-strength outer tube packer that can achieve long-term isolation. After the packer is swelled, the cartridge is filled with cement and firmly embedded in the ground to ensure that the packer is effective for a long time.

The interlayer anti-channeling completion device is mainly composed of an upper joint, an integrated hydraulic system, a reversing pressure valve assembly, a high-temperature rubber cylinder, and a lower joint. In the process of pressure and pressure release in the pipe, the expansion of the rubber cylinder is achieved by integrating the action of the hydraulic system and the reversing pressure-bearing valve assembly.

Instructions for use


Inspection: The body of the device must not have any mechanical damage, the snail mosquito is complete and meets the requirements of the standard, and the plastic cartridge has no damage.
Run-in: The interlayer anti-channeling completion device is driven into the designated position with the completion string (the device's cartridge is generally located in the middle of the thin compartment).
Fill cement according to design requirements.
Pressure: The connecting rod of the inner cavity of the device is cut off during the downward movement of the rubber plug.
Cylinder expansion: pressure in the tube, high-pressure fluid pushes the piston in the device downward, compressing the functional material; pressure in the tube, high-pressure functional material pushes the piston in the upward direction, and at the same time suck the cement slurry between the device and the well wall; The fluid pushes the piston downward, and the piston descends. At the same time, the sucked cement slurry is pushed into the rubber cylinder, and the rubber cylinder expands and seals. Repeat four times in a row to complete the expansion of the cartridge.

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Service Hotline


Address: 66 Yongfeng Road, Kenli Economic Development Zone, Dongying City, Shandong 

Tel:+86546-2388099 13356610266  President Jiang     E-mail: brjzg@163.com


Shandong Yukos Petroleum Equipment Co., Ltd.

  Powered by www.300.cn 鲁ICP备14021590号-1  

Shandong Yukos Petroleum Equipment Co., Ltd.

  Powered by www.300.cn 鲁ICP备14021590号-1