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No sleeve milling and washing well valve
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No sleeve milling and washing well valve

Product description

No sleeve milling and washing well valve

Product description


After mechanical sand control measures are taken in the sand production reservoir, the annulus between the sand control pipe string and the casing is filled with dense sand filling. In the long-term production process, sand filling and consolidation of argillaceous, fine sand, and crude oil have made it difficult to salvage sand control pipe strings. This phenomenon occurs in long well sections, highly inclined wells, and thick It is particularly prominent in oil wells. At present, when sand control pipe strings are salvaged, large-load activities are often used to release the card. When the card is unsuccessful, a sleeve milling drum is used to perform multiple sleeve milling reverse buckles and segmented salvage, which greatly increases the difficulty of fishing and construction costs.

Aiming at the difficulty of fishing, we designed and developed the sleeveless milling and washing well valve. The device establishes a circulation channel with the outside of the sand control pipe string, flushes out the filling sand, fine sand, mud, etc. outside the sand control pipe string, loosens the filling layer, and then fishes out the sand control pipe string at one time, greatly improving the sand control pipe. The salvage success rate of the column.

The sleeveless milling and washing well valve is mainly composed of an upper joint, a sealing system, a channel switch assembly and the like. The sleeveless milling and washing well valve is equipped with a special service tool to achieve the smooth opening of the well washing valve.

Technical characteristics


Simple operation and easy matching: It can be run directly by flushing or tubing, and it can also be used with coiled tubing.
The cleaning is comprehensive and thorough, and the coverage is increased: the entire screen section and every part of the screen can be spread through the rotary cleaning.
The plugging effect is good: the device can effectively remove the blockage of the screen tube, blasthole and near-well, and the pressure drops 2MPa after cleaning.

It can be implemented with the pickling process.

Instructions for use


The high-pressure rotating water jet deblocking device is connected to the end of the pipe string according to the design, and is lowered to the lower position of the oil layer.
Connect the pump truck and the ground pipeline, and test the ground pipeline pressure.
Open the oil pipe and casing gates, and cycle the well with a large displacement of the pump truck. After the liquid returns from the outlet, slowly lift the lowering and lowering of the pipe string for unblocking operations to ensure that the upper and lowering range covers the entire oil layer. (For wells with longer intervals, you can take the form of single roots or use coiled tubing for flushing, or you can increase the number of units).

After the plugging is completed, the well is fully washed until the inlet and outlet are consistent, and then the pipe string is lifted out.

Well selection conditions


Oil and water wells with reduced fluid volume due to blocked screens.
Suspected blocked boreholes or oil and water wells near the well.

Oil wells that require measures such as acidification and viscosity reduction.

Technical Parameters

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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