Attachments for well drilling machines in the nature of overshots; Downhole oil separators for submersible pumps; Drilling rigs, floating or non-floating; Hydraulic valves being parts of machines; Oil field equipment, namely, drilling rig mechanical handling machines and devices; Oil field equipment, namely, drilling rig mechanization machines and devices; Oilfield production machines for extracting oil from geological layers and processing hydrocarbons; Parts of oilfield wellhead machines, namely, gate valves, ball valves, check valves, plug valves, globe valves, choke and manifold industrial pumps, pump and valve parts, pipe fittings and flanges; Skid-mounted oil and natural gas extracting and processing machines, namely, centralization casing cementing equipment, namely, power tools used for drilling, casing, cementing