Title :
A study on wellhead backpressure automatic control system of coalbed methane drilling
Author :
Xie, Chong ; Li, Dan
Author_Institution :
Mechatron. Eng. Coll., Southwest Pet. Univ., Chengdu, China
Abstract :
During coalbed methane drilling operations, Downhole pressure has to be controlled accurately for reservoir protection. The downhole pressure can be controlled by restricting the drilling fluid flow through a choke valve at the top of the well. This paper presents a closed-loop wellhead back pressure automatic control scheme based on a low order wellhead backpressure control model. The researching and simulation results show that the wellhead backpressure automatic control system can meet the requirements of coalbed methane drilling.
Keywords :
closed loop systems; coal; drilling (geotechnical); mining industry; valves; choke valve; closed loop wellhead backpressure automatic control; coalbed methane drilling; downhole pressure; drilling fluid flow; reservoir protection; wellhead backpressure automatic control system; Asia; Coal; Educational institutions; Mechatronics; Natural gas industry; Petroleum; Reservoirs; automatic control; coalbed methane drilling; wellhead backpressure;
Conference_Titel :
Electrical and Control Engineering (ICECE), 2011 International Conference on
Conference_Location :
Yichang
Print_ISBN :
978-1-4244-8162-0
DOI :
10.1109/ICECENG.2011.6057887
