A small portion of the striking workers at Woodside Petroleum's Pluto project have staged a protest at the operation's gates as the company prepares to sue the Construction, Forestry, Mining and Energy Union and its assistant Joe McDonald.

A small portion of the striking workers at Woodside Petroleum's Pluto project have staged a protest at the operation's gates as the company prepares to sue the Construction, Forestry, Mining and Energy Union and its assistant Joe McDonald.