7
Mechanical equipment for use in earthworks, construction, oil and gas extraction and mining, oil drilling rigs, oil refining machines, oil pumping machines, mechanical closures for oil wells, tools for improving efficiency when drilling oil wells; Mechanical equipment for use in earthworks and accessories therefor, in particular whipstocks, well packers, baffle plates, borehole pumps, ball release tools, borehole casing scrapers, tools for inserting screw plugs, screw plugs, centring devices for liner tubes, pipe muffs, pipe guides, pipe milling machines, pipe scrapers, casing shoes, cement baskets, cement spreaders, cementing plugs, switching current ducts, rotary parts, rotary connectors, flushing pumps, regulators, borehole separating and milling tools, borehole motors, tools for the directional boring of boreholes, borehole oil and borehole water separators, borehole output pumps and punch heads, borehole floats, electric submersible motors, electric submersible pumps, electric submersible locks, cables for electric submersible pumps, expansion joints, sensors and junk catchers, separating tools, connecting nipples, horizontal pumps, hydraulic hand pumps, junk baskets, junk pushers, levelling devices for pipes and kellies, liner terminals, well packer inserting tools, perforating and completing tools and pipe clamps and parts therefor, plug catchers, cementing manifolds, extendible cementers, extension joints, rotary gas separators, safety connectors, sand filters, stop rings, riser fixtures, centring devices for risers, riser heads, riser closing nipples, riser shoes, riser flushing heads, unloading connectors, valves, kelly valves, variable speed regulators, wall shavers, wall scrapers, borehole packers, wire rope guillotine shears, tools for inserting and operating wire ropes, wire rope-guided tools for measuring boreholes and for taking formation samples, shut-off fitting for the oil and natural gas industry and mining, ball valves, three-way valves, pig valves, kelly valves, wellhead equipment, Christmas tree (extraction rig) equipment, gate valves, drillstring components, conveying and liner tubes
40
Oil well fracturing; Refining of oil; Customised metal treating; Deep-hole boring in solid materials; Rotation of precision and straight turning parts; Thread cutting in special and oil field threads; Alignment of straight turning parts; Graters; Honing and rolling over of straight turning parts; Joint and build-up welding; Manufacture of well packings, whipstocks, baffle plates
42
Exploration and investigation of crude oil and gas reserves and crude oil and gas fields; Analysis and testing for oil workings; Analytical services relating to the development of oil fields; Conducting feasibility studies relative to oil field exploitation; Assaying minerals or oils; Oil-well testing; Drawing up of expert technical opinions in connection with oil deposits