As a typical unconventional gas reservoir with low pressure

permeability and water cut

deep coalbed methane needs effective support fracturing to achieve good development effects

leading to large difference of liquid production in the whole life cycle of gas wells. Based on the comparison of coalbed methane recovery effect of different well types in Yanchuan South coalbed methane exploration and development block

it is considered that although the L-shaped horizontal well has the construction cost similar to that of three directional wells

but its production is higher and post-operation and maintenance cost is lower. It is more suitable for coalbed methane development in mountainous areas. By comparing the characteristics of different lifting processes

the combination of pumping unit and forced closed spring inclined well pump is optimized

and the drainage and gas recovery in the whole life cycle of L-shaped horizontal well is realized. In the gas wells with low liquid production

the technology of water drainage gas recovery has achieved good stimulation effects in the gas wells with small deviation

and high influence of liquid accumulation and pulverized coal. The existing mechanical production equipments can realize the efficient utilization of assets

save the cost of purchased materials

reduce the energy consumption index

and provide referential significance for the further drainage gas production in low liquid production wells.