April 20 (Reuters) - Mitchell Services Ltd MSV.AX :
* Material contract award
* Has entered into a one-year contract containing two one-year extension options with BHP Billiton (LON:BLT) at its Olympic dam mine in South Australia
* Contract is material in size based on anticipated resulting revenue.
* Under contract, Co will provide underground diamond drilling services Source text for Eikon: Further company coverage: MSV.AX