7
Mechanical equipment for earthworks, construction, oil and gas extraction, and mining extraction; Oil drilling rigs; Oil refining machines; Oil-well pumping machines, Mechanically operated stoppers for use in oil well applications; Impact enhancing tools for use in the drilling of oil wells; Mechanical equipment for use in earthworks, and parts and fittings for mechanical equipment for use in earthworks, construction, oil and gas extraction and mining, namely whipstocks, well packers, baffle plates, borehole pumps, ball release tools, borehole casing scrapers, tools for inserting screw plugs, centring devices for liner tubes, 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, expansion joints, sensors and junk catchers, separating tools, connecting nipples, horizontal 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, tools for the wire rope-guided measurement of boreholes and for taking formation samples, shut-off fittings 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
37
Oil drilling and Extraction of oil; Drilling of deep oil or gas wells; Building construction; Installation, repair and maintenance of oil pipelines; Drilling of water, gas and oil wells; Installation of oil refineries; Rental of oil well drilling tools; Oil well casing, tubing, and drill pipe installation; Oil and gas well treatment services, namely, preparation and spill treatment services prior to and during wellbore drilling
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, grating, honing and rolling over of straight turning parts, joint and build-up welding, manufacture of well packings, whipstocks, baffle plates, all of the aforesaid services being provided in accordance with customer-specified third-party contracts
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; Analysis of minerals and oils; Oil-well testing; Drawing up of expert technical opinions in connection with oil deposits