石油钻采工艺Issue(5)：100-102,3.DOI:10.13639/j.odpt.2014.05.024
煤层气直井排采捞煤粉一体化技术
Technology of integrating drainage, gas production and coaldust bailing for coalbed methane vertical wells
摘要
Abstract
During extraction of coalbed methane well, the most used method is pumping unit discharge and extraction system. The conventional mono-barrel pump is usually used as the discharge and extraction pump;the main problem of this pump is that pump is stuck by coal dust with standing valve and traveling valve are also stuck by coal dust, leading to frequent operation of the system and severely affecting the production efifciency of coalbed methane. In order to effectively solve this problem, a set of string integrating dis-charge, extraction and bailing of coal dust has been developed, which uses new coal dust-proof pump and basket settling pipe, making it possible to integrate discharge, extraction and sand bailing in coalbed methane wells. The new coaldust-proof pump utilizes long plunger structure with highly standing valve and large-diameter travelling valve, which cannot only effectively prevent coaldust from sticking the standing valve and travelling valve, but also effectively prevent coaldust from entering pump barrel and causing stuck pump. The coaldust deposited during discharge and extraction goes into the basket sand setting pipe, which will be removed together with coaldust deposited in the sand setting pipe during pump inspection, diminishing the work of bailing coaldust and saving the cost. Field applica-tion shows that the pipe string integrating coalbed methane discharge, extraction and coaldust bailing by vertical well can meet the site requirement, extend the pump inspection cycle and has good promotion prospect.关键词
煤层气/直井/排水采气/捞砂/一体化Key words
coalbed methane/vertical well/drainage and gas production/sand bailing/integration分类
能源科技引用本文复制引用
段宝玉,崔金榜,段冉,陈杰,郑庆龙,李进光..煤层气直井排采捞煤粉一体化技术[J].石油钻采工艺,2014,(5):100-102,3.基金项目
国家科技重大专项“水平井排采及集输配套技术应用”（编号2011ZX05061）。 （）
