Study on optimization of coalbed methane drainage equipment in Binchang Mining Area

The selection of drainage equipment has great influence on the drainage effect of coalbed methane wells. Binchang Mining Area is rich in CBM resources and belongs to the ultra-large moderm mine under the national“Twelth Five-Year Plan" .In order to improve the extraction rate of coalbed methane ( CBM ) ,on the basis of analyzing the adaptability and influencing factors of the mining equipment and combining the geological conditions and drainage data of Binchang Mining Area, the parameter quantification comprehensive evaluation method is used to optimize the drainage equipment. The results show that the best drainage method in Binchang Mining Area is by rod pump, with the selection of 038 mm tube pump.Considering the ffctst of static load , stroke and torque , the calculation of suspension load formula shows that well depth is 400~ 600 m, the CYJ4- 1.5-9 pumping unit is selected; when the well depth ranges from 600 to 1 000m, the CYJ5-2.1- 13 pumping unit should be chosen , sucker rod should employ the D grade 019 mm, and the application effect is pretty good in the practice of subsequent mining.The research results can provide certain technical support for the selection of calbed methane drainage and mining equipment in Binchang Mining Area in the future.