In the process of drilling construction of gas pumping-exhaust well in coal mine,it is neces-sary to put in super heavy and extra large casing pipe,and the total quality of casing pipe is generally far more than the maximum range of construction drilling rig lifting.It is very necessary to develop appropriate casing technology to ensure the successful sinking of casing pipe.Therefore,based on the buoyancy law,theoretical calculation formulas for various parameters in the process of sinking casing pipe by double plug self balancing method with temporary buoyancy plug were derived.It introduces the process of using this method to sink super heavy and extra large casing pipe,and demonstrates the engineering demonstration in the drilling construction of the gas extraction system renovation and ex-pansion in Gubei Coal Mine.According to the design parameters obtained by the theoretical calculation method,the construction was carried out,and the safe sinking of super heavy and extra large casing pipe was realized.The research results can provide certain references for the parameters design of sinking super heavy and extra large casing pipe by buoyancy method.
关键词
临时浮力塞/双塞自平衡下管法/超重特大套管/瓦斯抽排管/钻孔施工
Key words
temporary buoyancy plug/sinking casing pipe by double plug self balancing method/super heavy and extra large casing pipe/gas drainage pipe/drilling construction
维普
万方数据