Two oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishmentTwo oil rigs arrive in Belfast for refurbishment