It makes fissure occupation in reason and at the same time guarantee the construction success by using multistage ladder sand-franc technique.
采用多级阶梯加砂压裂技术，使裂缝充填合理，同时保证压裂施工成功。
2
Firstly, general ideas and construction process of accumulative slippage technology were introduced, as well as corresponding design and calculation, multistage loading and slipping control measures.