页岩气压裂连续输砂关键设备的研制

Continuous Sand Transport Unit for Fracturing in Shale Gas Development

在页岩气大排量高砂比时,砂量需求大,且要求快速添加,采用常规压裂时的加砂方式输砂效率低、占地面积大,无法满足3~8m^3/min的加砂需求。鉴于此,提出以连续输砂装置为核心的连续输砂方案。根据连续输砂装置的结构和工作原理,认为该装置研制的关键是合理的动力配置、传动机构、控制方式以及旋转式橇座,进而研制了带式橇装结构的连续输砂设备。试验结果表明,连续输砂设备具有自动控制和砂量连续可调等功能,最大输砂量8.1m^3/min;简化了现场加砂程序,可满足当前页岩气大型压裂施工中多种类、大砂量的加砂需要,提高加砂效率。

Given large displacement and high sand ratio in shale gas recovery, a large amount of sand and fast sanding at 3~8 m3/min are required?The sanding mode in conventional fracturing is inapplicable for its low transport efficiency and large area occupation?This paper proposed a scheme with continuous sand transport unit?According to the structure and principles of the continuous sand transport unit, it is pointed out that proper power configuration, drive mechanism, control mode and rotary skid are critical for development of the unit?Thus, the continuous sand transport system with band?type skid was developed?The test results show that the continuous sand transport unit fea?tures automatic control, and continuous and adjustable sand transport, with the maximum capacity of 8?1 m3/min?Moreover, with simplified sanding procedures, the unit can meet diversified demands for large sanding volume in large?scale fracturing operations for shale gas recovery currently, realizing higher sanding efficiency.