Research and Application of Layered Fracturing Sand Blower
Abstract: Sand blower is the core tool of layered fracturing pipe string. The roles of sand blower in layered fracturing pipe string are as follows: 1) throttling function of the nozzle is used for hydraulic packer setting; 2) fracturing fluid flow channel is established to implement stratified fracturing of every designed layer. Stratified fracturing sand blower takes use of pitch pressure-out sliding sleeve structure to control the nozzle’s closing and opening. Multi-level sand blowers in fracturing pipe string are set up, cooperating with multiple packers. Multi-level sand blowers are set up from the bottom to the top in the fracturing string, working with packers which seal the annular and create separate channels to the layers, through which the fracturing fluids are pumped into the layers. The annulus between separated layers establishes respective channel, which connects fracturing fluid and target layer under construction for layered fracturing. The instantaneous area at the time of sand coming out from the sand blower is set based on parameter setting of the construction emission and fluid’s properties. Built-in tube structure is adopted in this new designed sand blower nozzle and ceramics are selected for the nozzle material which could improve the wearing resistance of the nozzle and the stability of throttling performance. Field application has proved that sandblasting equipment has very stable performance.
文章引用: 陈志忠 , 李金凤 , 吴晓芳 (2014) 分层压裂喷砂器研制与应用。 矿山工程， 2， 35-41. doi: 10.12677/ME.2014.24007
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