Title :
A Down-Hole Video Imaging Logging Tool
Author :
Su Juan ; Zhang Jia-tian ; Yan Zheng-guo ; Hu Chang-ling
Author_Institution :
Key Lab. of Educ. Minist. for Photoelectricity Gas & oil Logging & Detecting, Xi´an Shiyou Univ., Xi´an, China
Abstract :
Imaging logging technology is applied widely in casing inspection, casing scale-removing and downhole ashing because of direct expression and more information. The DHV-05 downhole video is designed, which employed wavelet based image-compression, high speed digital modulation transmission, CPLD based demodulation, special mechanism to achieve downhole video image compression, high speed wire data transmission, down-hole illumination and high temperature. The stability has been proved through the data transmission test on 3000 m wire and 125°C high temperature test.
Keywords :
data communication; data compression; video coding; wavelet transforms; CPLD based demodulation; DHV-05 downhole video; casing inspection; down-hole video imaging logging tool; downhole video image compression; high speed digital modulation transmission; high speed wire data transmission; temperature 125 degC; wavelet based image-compression; Data communication; Demodulation; Digital modulation; Image coding; Inspection; Lighting; Temperature; Testing; Video compression; Wire;
Conference_Titel :
Information Engineering and Computer Science, 2009. ICIECS 2009. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4994-1
DOI :
10.1109/ICIECS.2009.5364655
