Drilling rods; Connecting rods for machines for use in downhole such as for drilling and in oil and gas wells including sucker rods, motors and engines for use in downhole such as for drilling and in oil and gas wells; Couplings other than for land vehicles, other than for land vehicles; Non-electric coupling sleeves (parts of machines) for use in downhole such as for drilling and in oil and gas wells; Transmission shafts for machines for use in oil and gas; Guides for machines for use in downhole such as for drilling and in oil and gas wells including rod guides and sucker rod guides; Moulded component parts of machines for use downhole such as drilling and in oil and gas wells including rod guides and sucker rod guides; Oil drilling tools; Scraper apparatus (machines) for removing sludge