CHK Oil (HKG:0632) said two of its China units have signed separate 10-year agreements with Zhejiang Dumei Electronics Technology to support sales of oil and gas extraction equipment, according to a Monday Hong Kong bourse filing.

Shares of the firm were down over 1% in Tuesday morning trade.

Port Oil will provide market development services and earn a fee initially set at 15% of Dumei's sales revenue, subject to adjustment.

Dumei will appoint the unit exclusively for these services.

Palm Energy will provide technical services and development support, earning a fee set at 10% of sales revenue.

The two sides will also jointly develop and co-own any new patented technologies, the filing said.