Machining And Surface Engineering

Machining and Surface Engineering Services includes design consultation, precision machining, fitting and assembly, all on both prototypes and custom-designed parts. The division has a broad range of state-of-theart machine tools and machineries capable of various services such as Thermal Spraying - ARC SPRAY & HVOF, Precision Machining, Heavy Duty Machining, Reverse Engineering, Complex Machining, Refurbishment of Oilfield components, Dynamic Balancing up to 16 tons &manufacturing of oilfield drilling tools as per API 5CT & API 7-1.

Currently, this service has started Mud Rotor Refurbishment Services, Downhole tool refurbishment with TC hard-facing, API related batch quantity & critical components manufacturing, Field Inspection services. The target is now Gas Turbine Power Plant Repairs with PDO.

AOTC boasts a well-equipped Facility, where we give worn out or broken machine components new machine lifetimes, with multiple services from scientific analysis to turnkey repairs that can keep your fleet of machines working.

AOTC focuses on preventive maintenance and repair welding, reducing scrap and countering the effects of your work on your machinery. Our extensive knowledge of metallurgy and deep experience in manufacturing and repair also help us to develop new solutions and enhance older processes.

Machining And Surface Engineering


  • “Thermal Spraying Facility” ARC SPRAY & HVOF process
  • Precision Machining Services
  • Heavy Duty Machining Services
  • Reverse Engineering Services
  • Complex Machining
  • Refurbishment of down hole Oilfield components.
  • Manufacturing of Oilfield Drilling Tools as per API specification like crossover subs, PUP joints, DSAF, Drilling spools, adaptor flanges, Rotary shoulder crossovers etc.
  • Our machine shops are fully equipped with computerized CNC units, lathes, mills, borers and grinders – all of which are operated by experienced personnel highlyskilled in every aspect of machine shop activity
  • Our in-house capabilities allow us to manufacture, repair and refurbish a comprehensive spread of drilling and down hole tools to ensure your equipment arrives in optimal condition for maximum operational efficiency
  • Drill Collars
  • Drill Pipe Pups
  • Heavy Wall Drill Pipe
  • Stabilizers – Integral Blade, Welded & Sleeve
  • Substitutes, X-overs, Side Entry
  • Drift Mandrels
  • Tool Joint build-up
  • Zinc Phosphating of threaded connections and shot peening of thread
  • Complete range of junk milling tools
  • CNC Lathe & VMC (Vertical Machining Centre) manufacturing facility for mass production and to provide high precision & complicated profiles machining like Spider, taper bushings etc.
  • Specialized maintenance & repair welding of various metallurgy

Critical Parts Machining

Thermal Spray process

CNC Lathe Machine

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