The Causes and Prevention Measures of Stuck Pump Phenomenon of Rod-pumped Well in CBM Field

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Yonggui, Mei^1

Petrochina Huabei Oilfield CBM Branch Company, Jincheng, Shanxi Province, China^1

关键词: Operation management;    Pipe string structure;    Prevention measures;    Production practice;    Rod;    pumped wells;    Sediment composition;    Technology optimization;    Terminal velocity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012076/pdf
DOI  :  10.1088/1755-1315/113/1/012076

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In the process of CBM field exploitation, in order to realize the drainage equipment to work continuous stably, the article pays attention to study and solve the stuck pump problem, and aim of reducing reservoir damage and lowing production costs. Through coal particles stuck pump experiment and sediment composition analysis, we find out five primary cause of stuck pump phenomenon: sand from coal seam, sediment from ground, iron corrosion, iron scrap caused by eccentric wear, coal cake. According to stuck pump mechanism, the article puts forward 8 measures to prevent stuck pump phenomenon, and the measures are focused on technology optimization, operation management and drainage process control. After 7 years production practice, the yearly stuck pump rate has dropped from 8.9% to 1.2%, and the pump inspection period has prolonged 2 times. The experiment result shows that pure coal particles cannot cause stuck pump, but sand, scrap iron, and iron corrosion are the primary cause of stuck pump. The article study and design the new pipe string structure that the bottom of the pipe string is open. This kind of pipe string applied the sedimentation terminal velocity theory to solve the stuck pump phenomenon, and it can be widely used in CBM drainage development.