Title :
Study and Implement of Downward Communication Function in Rotary Steerable Drilling System
Author :
Nan, Tang ; Aiqing, Huo ; Yaolong, Wang ; Weibin, Cheng
Author_Institution :
Shaanxi Key Lab. of Oil-Drilling Rigs Controlling Tech., Xi´´an Shiyou Univ., Xi´´an, China
Abstract :
In rotary steerable drilling system, there should be a downward communication channel to send the guided control command from ground monitor to downhole steeling tool. The downward command word has been transmitted by negative pulse of mud drilling fluid and encoded by a characteristic of three-descending and three-ascending. Downward communication receiving function in downhole tool detects the change of underground mud flow; then gets the guided control command rightly by processing and interpretation software. Several different measures are used in receiving device for improve reliability and anti-interference performance of downward transmitting. Experimental results show the feasibility of this downward transmission scheme.
Keywords :
mining equipment; oil drilling; steering systems; anti interference performance; downhole steeling tool; downward communication function; guided control command; mud drilling fluid; oil-well drilling technology; rotary steerable drilling system; underground mud flow; Acoustic waves; Communication system control; Computerized monitoring; Condition monitoring; Control systems; Costs; Degradation; Drilling; Fluid flow control; Pulse measurements; downward communication; drilling fluid pulse; receiving device; steering drilling;
Conference_Titel :
Computer Science and Engineering, 2009. WCSE '09. Second International Workshop on
Conference_Location :
Qingdao
Print_ISBN :
978-0-7695-3881-5
DOI :
10.1109/WCSE.2009.860
