** Oilfield services company's shares RCON.O up as much as
10.36% at $0.84 premarket
** Unit Recon Hengda Technology Co enters 3-year service
agreement with an oilfield client for oily wastewater treatments
** RCON says contract amount expected to be 3.5 mln yuan
($519,866.32) per year
** Recon Technology is China's first Nasdaq-listed non-state
owned oil and gas field services company
($1 = 6.7325 Chinese yuan renminbi)
(Reporting by Rithika Krishna in Bengaluru)
((Rithika.Krishna@thomsonreuters.com; Twitter: https://twitter.com/rithika_krishna))