Reconditioning Services - Trinity Holdingsuploads.trinityholdings.com/2014/04/Rainbow-Rotors-and-Downhole... · Mud Motor Rotors Stub Welding Matching and finish machining Making

Rainbow Mechanical and Electrical Works

© Copyright 2013 Trinity Holdings. All Rights Reserved

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


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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


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Stripping of existing coating

Stripping Tank

Stripping in progress



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Pre-polishing

Pre-polishing



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Magnetic Particle Inspection (MPI)

Checking for surface defects



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Grit Blasting

Blasting to prepare the surface for coating

Blasting room



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HVOF coating

HVOF Tungsten carbide coating on the surface of

the rotor



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Finish Polishing

Final Polishing



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DPT/ Final Inspection

Final Inspection and all dimension checks

Dye Penetrant test to check for coating defects



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Ultrasonic test (If required)

UT test is carried upon customer request to check

for bond integrity



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Sealing

Baking furnace for sealant

Indigenous Rainbow sealant is applied to seal

the micro-porosity



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Packing/ Delivery

Handling and transport

Protection packing



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QC Package

All major and minor dia pre-sizes and final sizes

Coating material spec and its conformity

NDT reports if required

COC

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


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Preparation

Involves Fixtures Taping Cleaning Chemical activation



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Chrome plating

Process under progress inside Chrome tank



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Polishing/buffing

Buffing/ Polish finish

Mud Motor Rotors


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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


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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


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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


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group subsidiaries

Documents

Reconditioning Services - Trinity Holdingsuploads.trinityholdings.com/2014/04/Rainbow-Rotors-and-Downhole... · Mud Motor Rotors Stub Welding Matching and finish machining Making