Reconditioning Services - Trinity...

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Rainbow Mechanical and Electrical Works

Reconditioning Services

Mud Motor Rotors and Down hole tools

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

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

Surface damage due to salt incursions Pittings due to corrosion

Incoming inspection – Typical damages

Damages due to acid attack Deep pitting

HVOF carbide coating on mud motor rotors

Stripping of existing coating

Stripping Tank

Stripping in progress

Pre-polishing

Magnetic Particle Inspection (MPI)

Checking for surface defects

Grit Blasting

Blasting to prepare the surface for coating

Blasting room

HVOF coating

HVOF Tungsten carbide coating on the surface of

the rotor

Finish Polishing

Final Polishing

DPT/ Final Inspection

Final Inspection and all dimension checks

Dye Penetrant test to check for coating defects

Ultrasonic test (If required)

UT test is carried upon customer request to check

for bond integrity

Sealing

Baking furnace for sealant

Indigenous Rainbow sealant is applied to seal

the micro-porosity

Packing/ Delivery

Handling and transport

Protection packing

QC Package

All major and minor dia pre-sizes and final sizes

Coating material spec and its conformity

NDT reports if required

Major dia

6.3446.3466.3486.3506.3526.3546.3566.3586.3606.3626.364

1 2 3 4 5 6 7 8

Observation Maximum Minimum

4.9344.9364.9384.9404.9424.9444.9464.9484.9504.952

1 2 3 4 5 6 7 8

6.2856.2906.2956.3006.305

1 2 3 4 5 6 7 8

Observation

Maximum Minimum

4.9004.9104.9204.9304.9404.9504.960

1 2 3 4 5 6 7 8

Minor dia

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

Chrome plating

Process under progress inside Chrome tank

Polishing/buffing

Buffing/ Polish finish

Mud Motor Rotors

Additional Services

Joining of two rotors to make a bigger one

Stub welding

Catcher repair

Shortening and re-threading

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

Matching and finish machining

Making new stub and welding to rotor

Cutting the damaged part

Mud Motor Rotors Catcher repairs

Machining out damaged bore

Finish machining to the spec

Shrink fitting and welding sleeve onto catcher bore

Manufacturing new sleeve

Mud Motor Rotors Shortening and re-threading

Machine/ cut the un-wanted 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

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

Bearing Mandrel MMA Housings

Turbine bearings Lower rotating bearings

Mud screens with coating Valve body repair

Adjustable bent housings Drill collar repair

group subsidiaries

Reconditioning Services - Trinity...

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