Continuous semispherical sand mixing device for fracture

Abstract

The invention belongs to the field of petroleum machinery and particularly relates to a continuous semispherical sand mixing device for fracture. The continuous semispherical sand mixing device is applicable to exploitation of unconventional oil-gas (such as shale gas and the like). The continuous semispherical sand mixing device for fracture comprises a base, a sand mixing chamber, a transmission box, an upper end cover, a spindle, an internal gear, a cantilever shaft and a transmission gear and is characterized in that the base, the sand mixing chamber, the transmission box and the upper end cover are fixedly connected in sequence. Compared with a traditional open sand mixing device, the continuous semispherical sand mixing device for fracture has the advantages that continuous mixing and continuous output of fracturing fluid and sand are realized, so that sand mixing efficiency is improved; compared with a Jerry continuous sand mixing device, the continuous semispherical sand mixing device for fracture has the advantages that blade abrasion is greatly reduced, high uniformity in mixing of the fracturing fluid and the sand is achieved, and the whole sand mixing effect is improved remarkably.

Description

technical field [0001] The invention belongs to the field of petroleum machinery, and in particular relates to a continuous hemispherical sand mixing device for fracturing, which can be applied to the development of unconventional oil and gas (such as shale gas, etc.). Background technique [0002] The development of shale gas puts forward higher requirements on the pressure and displacement of fracturing equipment. If you want to increase the displacement of sand mixing, the traditional open mixing device can only increase the volume of the sand mixing tank, but due to the limitation of the chassis, the method of increasing the displacement by increasing the volume of the sand mixing tank is already very popular in vehicle-mounted equipment. Difficult to achieve greater improvement. Jereh company put forward the concept of continuous sand mixing, adopting the method of "mixing and discharging immediately", which avoids the shortcomings of traditional sand mixing devices th...

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Problems solved by technology

However, it has been found in field use that the sand mixing uniformity of this continuous sand mixing device still needs to be improved. Because it is based on the principle of liquid turbulent flow, it requires a very high rotation speed of the impeller, and because the impeller is in direct contact with the sand, the wear of the impeller is very serious. Serious, affecting the overall service life of the mixing device

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