Rainbow Mechanical and Electrical Works Reconditioning Services Mud Motor Rotors and Down hole tools
Rainbow Mechanical and Electrical Works Part of Trinity Holdings, UAE. Established in 1991, Abu Dhabi,to offer specialized services to Oil & Gas industry Worldwide Specializes in Thermal spray and surface treatment services Houses modern spray technology including HVOF, Plasma and Twin wire arc processes Supporting facilities include CNC machinery, Heat Treatment furnaces, re-chroming provisions and laboratory
Rainbow Mechanical and Electrical Works Mud Motors rotors reconditioning works HVOF, tungsten carbide coating on rotor surface Hard chrome plating on rotor surface Joining of two rotors Stub welding Catcher repair Shortening and re-threading
Mud Motor Rotors HVOF tungsten carbide coating on Rotors Incoming inspection Stripping of existing coating Pre-polishing MPI (Magnetic particle Inspection) Grit Blasting HVOF spray Polishing Final Inspection and DPT Sealing Package/ handling and QC
Incoming inspection Typical damages Surface damage due to salt incursions Pittings due to corrosion Damages due to acid attack Deep pitting Page 5
HVOF carbide coating on mud motor rotors Stripping of existing coating Stripping Tank Stripping in progress Page 6
HVOF carbide coating on mud motor rotors Pre-polishing Pre-polishing Page 7
HVOF carbide coating on mud motor rotors Magnetic Particle Inspection (MPI) Checking for surface defects Page 8
HVOF carbide coating on mud motor rotors Grit Blasting Blasting room Blasting to prepare the surface for coating Page 9
HVOF carbide coating on mud motor rotors HVOF coating HVOF Tungsten carbide coating on the surface of the rotor Page 10
HVOF carbide coating on mud motor rotors Finish Polishing Final Polishing Page 11
HVOF carbide coating on mud motor rotors DPT/ Final Inspection Dye Penetrant test to check for coating defects Final Inspection and all dimension checks Page 12
HVOF carbide coating on mud motor rotors Ultrasonic test (If required) UT test is carried upon customer request to check for bond integrity Page 13
HVOF carbide coating on mud motor rotors Sealing Baking furnace for sealant Indigenous Rainbow sealant is applied to seal the micro-porosity Page 14
HVOF carbide coating on mud motor rotors Packing/ Delivery Protection packing Handling and transport Page 15
HVOF carbide coating on mud motor rotors QC Package All major and minor dia pre-sizes and final sizes Coating material spec and its conformity NDT reports if required COC 6.364 6.362 6.360 6.358 6.356 6.354 6.352 6.350 6.348 6.346 6.344 1 2 3 4 5 6 7 8 4.952 4.950 4.948 4.946 4.944 4.942 4.940 4.938 4.936 4.934 1 2 3 4 5 6 7 8 Observation Maximum Minimum Observation Maximum Minimum Major dia Minor dia Page 16
Mud Motor Rotors Hard chrome plating on Rotors Incoming inspection Stripping of existing coating Pre-polishing MPI (Magnetic particle Inspection) Preparation Chrome plating Buffing/ finish Polishing Final Inspection and QC Package/ handling
Hard Chrome plating on mud motor rotors Preparation Involves Fixtures Taping Cleaning Chemical activation Page 18
Hard Chrome plating on mud motor rotors Chrome plating Process under progress inside Chrome tank Page 19
Hard Chrome plating on mud motor rotors Polishing/buffing Buffing/ Polish finish Page 20
Mud Motor Rotors Additional Services Joining of two rotors to make a bigger one Stub welding Catcher repair Shortening and re-threading Page 21
Mud Motor Rotors Joining of two rotors Connecting two cut rotors Welding the joint Stress relieving Finish polishing and re-coating
Mud Motor Rotors Stub Welding Cutting the damaged part Making new stub and welding to rotor Matching and finish machining
Mud Motor Rotors Catcher repairs Machining out damaged bore Manufacturing new sleeve Shrink fitting and welding sleeve onto catcher bore Finish machining to the spec
Mud Motor Rotors Shortening and re-threading Machine/ cut the unwanted portion Re-thread the connection Match with chamfer at the top
Down hole Tools Repair & Manufacturing (partial) Lower and Upper rotating bearing Bearing mandrel and housings Adjustable bent Housings Mud Screens (manufacturing with coating) Turbine housings Piston Housings Spline Mandrel MMA Housings & Seal Retainers Valve Piston Rhino Bodies Page 26
Down hole Tools Reconditioning services include HVOF tungsten carbide coating Ceramic coatings Electro less Nickel plating Sulphamade Nickel chrome plating Chrome plating Weld repairs Heat Treatment Page 27
Turbine bearings Lower rotating bearings MMA Housings Bearing Mandrel
Mud screens with coating Valve body repair Drill collar repair Adjustable bent housings
group subsidiaries Page 30