Abstract:
Because of high content of the gas powder dust (more than 1000 times the standard value), high flow rate and rapid gas flow, the gas drilling technique leads to serious pollution on the surrounding environment; besides, with respect to wells with H2S, its application popularization is seriously curbed because the effective enclosed sulfur removal is not possible. In response to problems abovementioned, one type of gas liquid solid three phase flow two-stage Enclosed Sand Separator for gas drilling is put forward herein. At present, the numerical simulation for the gas liquid solid three phase flow separation is mainly intended for the two phase flow separation, and it’s possible to simulate three phase flow separation. The author uses the quasi three phase flow mode, splits the gas liquid solid three phase flow into gas liquid and gas solid two phase flow, and establishes the Euler multiphase flow numerical calculation model. Besides, the correctness of the simulated calculation result is verified based on experiments. When the flow field motion rule of gas, water and sand inside the separation device and sand separation efficiency are drawn through calculation by using such a model, the better system scheme is thus determined, and successfully applied in YangJia 1st well. Studies herein has provided the numerical simulation method for the calculation of the gas liquid solid three phase flow separation efficiency, and is of great significance to the application popularization of the gas drilling technique, enabling recycling gas drilling and improvement on the well pad operation environment.
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