35
Business operation services for others in the field of oil and gas well drilling
37
Repair, refurbishing and installation of oil and gas well equipment for others; maintenance of oil field casing for others; oil field casing remedial services for others; maintenance of oil field tubing for others; oil field tubing remedial services for others; oil field pipe yard maintenance for others; oil and gas field tubing and casing thread cleaning for others; inspection and maintenance of oil and gas field drill pipe for others; rental and service of oil and gas well equipment and downhole tools; rental and service of oil and gas field pressure control equipment, oil and gas field tubing rental; oil and gas field drill pipe rental; and oil and gas field pressure control equipment
40
Applying protective coatings to oil field tubing
42
Technological supervision and inspection of oil and gas well equipment for others; inspection of oil and gas field casing for others; inspection of oil and gas field tubing for others; oilfield tubular pressure testing services; running and pulling oil and gas field pipe under pressure for others; oil and gas field fishing tool services for others; oil and gas field pressure control equipment services for others; logistics support, and distribution services for oil and gas field tubulars; technical consultation in the field of oil and gas well equipment selection, use and application techniques
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