Casing Centralizing Platform Equipment Classification

1

Windlass Components

Windlass Components, TD101Q-02.00

Main Body: Carbon Steel Q355 (Welded, Anti-Corrosive Coated); Transmission Shaft: Alloy Steel 40CrNiMoA (Quenched and Tempered)

1. Fatigue cracking of the main body weld caused by long-term high-frequency vibration; 2. Wear of the transmission shaft due to insufficient lubrication of matching bearings; 3. Corrosion of the outer surface caused by oilfield saline-alkali environment; 4. Deformation of the transmission structure caused by overload traction.

1. Conduct non-destructive testing (NDT) of the main body weld every 3 months to check for cracks; repair immediately if any defects are found; 2. Regularly inspect the lubrication state of the transmission shaft and matching bearings, and supplement lithium-based grease every 2 weeks; 3. Clean the outer surface regularly and reapply anti-corrosive paint every 6 months in saline-alkali environments; 4. Strictly follow the rated traction load, and install a load limiter to avoid overload operation.

2

Pneumatic Motor

Pneumatic Motor, TDYJ2.2-169

Shell: Aluminum Alloy 6061-T6; Rotor/Stator: Alloy Steel 20CrMnTi (Carburized and Quenched); Sealing Components: Nitrile Rubber (NBR)

1. Wear of rotor and stator caused by impure compressed air containing dust and moisture; 2. Sealing failure due to aging of sealing components in high-temperature oilfield environments; 3. Motor stall and overheating caused by insufficient air supply pressure; 4. Corrosion of the aluminum alloy shell caused by saline-alkali fog.

1. Install a high-precision air filter and dryer at the air inlet to ensure the purity of compressed air (particle size ≤ 5μm, dew point ≤ -20℃); 2. Replace the sealing components every 12 months or after 2000 operation hours, whichever comes first; 3. Ensure the air supply pressure is stable within the range specified by the motor (0.6-0.8MPa), and install a pressure regulating valve; 4. Apply anti-corrosive spray to the shell surface every month in saline-alkali environments to isolate corrosive media.

3

Drum

Drum, TD101-D-02.07

Drum Body: Carbon Steel Q235B (Rolled, Welded); Surface: Hard Chrome Plated

1. Abrasive wear of the surface caused by long-term friction with steel wire ropes; 2. Fatigue cracking of the weld at both ends caused by repeated winding and unwinding of the steel wire rope; 3. Corrosion of the chrome-plated layer caused by moisture and saline-alkali intrusion; 4. Deformation of the drum body caused by uneven stress during rope winding.

1. Check the surface wear regularly; replace the drum if the wear depth exceeds 1mm or the surface becomes uneven; 2. Conduct ultrasonic testing of the end welds every 6 months to check for fatigue cracks; 3. Apply anti-rust lubricating grease to the surface after each use to protect the chrome-plated layer; 4. Ensure the steel wire rope is evenly wound on the drum, and install a rope guide device to avoid uneven stress.

4

Bearing 6210

Bearing 6210, T276-1994

Inner/Outer Ring: Bearing Steel GCr15 (Quenched and Tempered); Rolling Bodies: Bearing Steel GCr15SiMn; Cage: Non-Metallic Polyamide (PA66)

1. Wear of rolling bodies and raceways caused by insufficient lubrication or contaminated lubricating grease; 2. Cage damage caused by impact load during sudden start-stop of the windlass; 3. Corrosion of the inner and outer rings caused by moisture intrusion; 4. Premature failure caused by improper installation with excessive interference.

1. Use special bearing grease (temperature resistance ≥ 120℃) and fill it to 1/3-1/2 of the bearing internal space; replace the grease completely every 3 months; 2. Avoid sudden start-stop of the windlass; use a frequency converter to achieve smooth speed regulation if possible; 3. Ensure the bearing installation environment is clean and dry, and install a sealing cover to prevent moisture intrusion; 4. Control the installation interference between the bearing and the shaft/housing within 0.01-0.03mm, and use a press-fitting tool for installation.

1

The Wheels of Dolly

The Wheels of Dolly, TD106D-02.00

Wheel Body: Ductile Iron QT500-7; Tire Surface: Rubber (Shore Hardness 65-70A)

1. Abrasive wear of the rubber tire surface caused by friction with the uneven oilfield ground; 2. Cracking of the rubber tire caused by high temperature and ozone aging in the open air; 3. Deformation of the wheel body caused by impact with stones or metal debris; 4. Separation of the rubber tire and the wheel body caused by long-term heavy load.

1. Clean the tire surface regularly to remove attached gravel and debris; avoid driving over sharp objects; 2. Store the platform in a shaded area when not in use to avoid long-term exposure to sunlight and ozone; 3. Check the wheel body for deformation monthly; replace the wheel if obvious deformation is found; 4. Control the load within the rated range, and avoid long-term static load on a single wheel.

2

The shaft of the wheels

The shaft of the wheels, YFT106D-02.02

Alloy Steel 40Cr (Quenched and Tempered, Surface Phosphating)

1. Bending deformation caused by impact load during movement on uneven ground; 2. Wear of the shaft surface caused by insufficient lubrication with matching bearings; 3. Corrosion of the phosphating layer caused by saline-alkali moisture, leading to rust; 4. Fatigue cracking caused by long-term alternating stress.

1. Avoid driving the platform over large obstacles; clean the operation site in advance if possible; 2. Apply lubricating oil to the contact surface with the bearing every 2 weeks to reduce friction; 3. Inspect the phosphating layer monthly; touch up with anti-rust paint if damaged; 4. Conduct magnetic particle testing (MPT) for fatigue cracks every 6 months, and replace the shaft immediately if cracks are found.

3

The Wheels of Dolly

The Wheels of Dolly, TD106D-02.03

Wheel Body: Ductile Iron QT500-7; Tire Surface: Polyurethane (PU)

1. Abrasive wear of the PU surface caused by friction with rough ground; 2. Scratching of the PU surface caused by sharp metal debris; 3. Deformation of the wheel body caused by overload; 4. Aging and brittleness of PU caused by long-term high-temperature environment.

1. Avoid driving over metal scraps and sharp gravel; clean the ground before moving the platform; 2. Check the PU surface for scratches monthly; repair small scratches with PU repair agent; 3. Strictly follow the rated load of the wheel, and do not overload the platform; 4. When the ambient temperature exceeds 60℃, reduce the continuous operation time and cool the wheel naturally.

4

Bearing 6006

Bearing 6006, T276-1994

Inner/Outer Ring: Bearing Steel GCr15; Rolling Bodies: Bearing Steel GCr15; Cage: Steel Sheet St12

1. Wear caused by dust and debris entering the bearing, resulting in abrasive particles; 2. Lack of lubrication leading to dry friction between rolling bodies and raceways; 3. Corrosion of the inner and outer rings caused by moisture intrusion; 4. Cage deformation caused by improper installation.

1. Install a dust cover and oil seal at both ends of the bearing to prevent dust and moisture intrusion; 2. Fill the bearing with lithium-based grease every month, and ensure the grease covers all rolling bodies; 3. Clean the bearing installation position thoroughly before installation to remove dust and debris; 4. Use a professional bearing puller for disassembly and assembly to avoid damaging the cage.

5

The Rear Wheels

The Rear Wheels, TD106D-04.01.00

Wheel Body: Forged Steel 45#; Tire Surface: Rubber (Shore Hardness 70-75A)

1. Abrasive wear of the rubber tire caused by long-term movement; 2. Fatigue cracking of the forged steel wheel body caused by repeated impact; 3. Corrosion of the wheel body caused by saline-alkali environment; 4. Separation of rubber and wheel body caused by improper bonding.

1. Inspect the tire wear monthly; replace the wheel when the tire wear reaches 1/3 of the original thickness; 2. Avoid driving over obstacles at high speed to reduce impact on the wheel body; 3. Apply anti-corrosive paint to the forged steel part every 3 months; 4. Check the bonding state of rubber and wheel body regularly; re-bond or replace the wheel if signs of separation are found.

6

The Rear Wheels

The Rear Wheels, 106B-04.01.01

Wheel Body: Ductile Iron QT450-10; Tire Surface: Rubber (Shore Hardness 70-75A)

1. Wear of the rubber tire surface caused by friction with the ground; 2. Deformation of the wheel body caused by overload; 3. Corrosion of the wheel body in saline-alkali and humid environments; 4. Cracking of the rubber tire caused by low-temperature aging in winter.

1. Control the platform movement speed to reduce friction between the tire and the ground; 2. Do not exceed the rated load of the wheel, and distribute the load evenly on all rear wheels; 3. Clean the wheel body regularly and apply anti-rust oil to the non-rubber parts; 4. In winter (temperature ≤ -10℃), check the rubber tire for brittleness; replace the tire if necessary.

7

Bearing 6204

Bearing 6204, T276-1994

Inner/Outer Ring: Bearing Steel GCr15; Rolling Bodies: Bearing Steel GCr15SiMn; Cage: Polyamide (PA66)

1. Wear caused by dust intrusion and lack of lubrication; 2. Cage damage caused by impact load during platform movement; 3. Corrosion of the inner and outer rings caused by moisture and saline-alkali; 4. Premature failure caused by misalignment during installation.

1. Install a double-layer dust seal to prevent dust intrusion; replace the lubricating grease every 2 months; 2. Avoid sudden acceleration and deceleration of the platform to reduce impact on the bearing; 3. Ensure the bearing is installed coaxially with the shaft, and the coaxiality error does not exceed 0.02mm; 4. Inspect the bearing for abnormal noise and temperature rise during operation; stop using it immediately if any abnormality is found.

8

The shaft of the rear wheels

The shaft of the rear wheels, TD106D-06.03

Alloy Steel 35CrMo (Quenched and Tempered, Surface Nitriding)

1. Bending deformation caused by uneven load on the rear wheels; 2. Wear of the nitrided layer caused by friction with the bearing; 3. Corrosion of the shaft surface in saline-alkali environments; 4. Fatigue cracking at the shaft shoulder caused by long-term alternating stress.

1. Ensure the platform load is evenly distributed on all rear wheels; avoid single-wheel load-bearing; 2. Check the nitrided layer thickness annually; re-nitriding or replacing the shaft if the thickness is less than 0.1mm; 3. Apply anti-corrosive grease to the shaft surface every month; 4. Conduct ultrasonic testing of the shaft shoulder every 6 months to check for fatigue cracks.

9

The Front Wheels of Board

The Front Wheels of Board, TD106D-05.03.00

Wheel Body: Ductile Iron QT500-7; Tire Surface: Polyurethane (PU)

1. Abrasive wear of the PU surface caused by steering friction; 2. Deformation of the wheel body caused by impact during steering; 3. Aging and hardening of PU caused by long-term exposure to sunlight; 4. Wear of the wheel hub caused by insufficient lubrication.

1. Avoid sharp steering to reduce friction between the PU surface and the ground; 2. Reduce the movement speed when steering to avoid impact on the wheel body; 3. Store the platform in a shaded area to avoid UV radiation; 4. Apply lubricating oil to the wheel hub every 2 weeks to reduce wear.

10

the front wheels

the front wheels, YFT106D-05-02

Wheel Body: Forged Steel 40Cr; Tire Surface: Rubber (Shore Hardness 65-70A)

1. Wear of the rubber tire caused by long-term steering and movement; 2. Fatigue cracking of the forged steel wheel body caused by repeated impact; 3. Corrosion of the wheel body in saline-alkali environments; 4. Separation of rubber and wheel body caused by high temperature.

1. Inspect the tire wear monthly; replace the wheel when the wear is excessive; 2. Avoid driving over obstacles during steering to reduce impact on the wheel body; 3. Clean the wheel body regularly and apply anti-corrosive paint; 4. In high-temperature environments (≥ 50℃), reduce continuous operation time to prevent rubber aging and separation.

11

The shaft of the front wheels

The shaft of the front wheels, YFT106D-05-03

Alloy Steel 40CrNiMoA (Quenched and Tempered, Surface Phosphating)

1. Bending deformation caused by steering impact; 2. Wear of the shaft surface caused by friction with the bearing; 3. Corrosion of the phosphating layer caused by moisture and saline-alkali; 4. Fatigue cracking caused by long-term alternating stress from steering.

1. Steer smoothly to avoid sudden impact on the shaft; 2. Apply lubricating grease to the contact surface with the bearing every 2 weeks; 3. Inspect the phosphating layer monthly; touch up with anti-rust paint if damaged; 4. Conduct magnetic particle testing (MPT) every 6 months to check for fatigue cracks.

12

Nut M20

Nut M20, GB6178-76

Alloy Steel 40Cr (Heat Treated, Zinc Plated)

1. Thread wear caused by repeated disassembly and assembly; 2. Corrosion of the zinc plating layer in saline-alkali environments, leading to thread seizure; 3. Thread stripping caused by over-tightening; 4. Deformation caused by impact load.

1. Use a torque wrench to control the tightening torque within 320-360 N·m; avoid over-tightening; 2. Apply anti-seize lubricant to the threads before installation to reduce wear during disassembly; 3. Inspect the zinc plating layer monthly; replace the nut if severe corrosion is found; 4. Use a protective cover to shield the nut from direct contact with saline-alkali media in harsh environments.

1

Ø27 Compound Ø27

Ø27 Compound Ø27, JB922-76

Metal Base: Carbon Steel Q235; Sealing Layer: Fluororubber (FKM)

1. Aging and cracking of the fluororubber sealing layer caused by high temperature and chemical media; 2. Corrosion of the metal base in saline-alkali environments; 3. Damage to the sealing layer caused by improper installation with sharp tools; 4. Deformation of the metal base caused by excessive clamping force.

1. Avoid using the compound in environments with temperature exceeding 200℃ or in contact with strong oxidants; 2. Clean the metal base regularly and apply anti-corrosive paint; 3. Use special tools for installation to avoid scratching the sealing layer; 4. Control the clamping force within the specified range to avoid deformation of the metal base and damage to the sealing layer.

2

Ø20X2.4O-ring Ø20X2.4

Ø20X2.4O-ring Ø20X2.4, JB3452.1-92

Nitrile Rubber (NBR) (Oil-Resistant, Temperature-Resistant ≤ 120℃)

1. Aging and hardening caused by long-term contact with mineral oil and high temperature; 2. Cracking caused by ozone aging in the open air; 3. Cutting damage caused by sharp edges of the installation groove; 4. Compression set caused by long-term static compression.

1. Use the O-ring with matching mineral oil-resistant lubricants; replace it every 6 months in high-temperature oil environments; 2. Store the O-ring in a sealed, dark container to avoid ozone and UV radiation; 3. Chamfer the installation groove edges to remove burrs and sharp edges; 4. Avoid long-term static compression of the O-ring; disassemble and relax it if the platform is not used for a long time.

3

MUFFLER G3/4

MUFFLER G3/4, G3/4

Shell: Aluminum Alloy 6063; Sound-Absorbing Material: Glass Fiber (Coated with Anti-Oil Coating)

1. Blockage of the sound-absorbing material caused by oil and dust in the compressed air; 2. Corrosion of the aluminum alloy shell in saline-alkali environments; 3. Damage to the sound-absorbing material caused by high-temperature exhaust gas; 4. Loosening of the shell connection caused by vibration.

1. Install a pre-filter at the inlet of the muffler to reduce oil and dust intake; clean the muffler every 1 month; 2. Apply anti-corrosive spray to the shell surface every month in saline-alkali environments; 3. Ensure the exhaust gas temperature does not exceed the maximum temperature resistance of the sound-absorbing material (≤ 150℃); 4. Check the shell connection regularly and re-tighten if loose.

1

Air Source Handling Device

Air Source Handling Device, QLPY320

Shell: Aluminum Alloy 6061; Filter Element: Polyethersulfone (PES); Sealing Components: Nitrile Rubber (NBR)

1. Blockage of the filter element caused by dust and oil in the compressed air; 2. Corrosion of the aluminum alloy shell in saline-alkali environments; 3. Sealing failure caused by aging of the sealing components; 4. Malfunction of the pressure regulating valve caused by internal contamination.

1. Replace the filter element every 1 month or when the pressure difference exceeds 0.1MPa; 2. Clean the shell regularly and apply anti-corrosive paint; 3. Replace the sealing components every 12 months; 4. Drain the condensed water in the device daily; clean the internal components of the pressure regulating valve every 3 months to remove contaminants.

2

commutator valve

commutator valve, K34R8A-L20

Valve Body: Cast Iron HT250 (Anti-Corrosive Coated); Valve Core: Alloy Steel 20CrMnTi (Carburized and Quenched); Sealing Ring: Fluororubber (FKM)

1. Wear of the valve core caused by dust and abrasive particles in the compressed air; 2. Corrosion of the valve body in saline-alkali and humid environments; 3. Sealing failure caused by aging of the fluororubber sealing ring; 4. Sticking of the valve core caused by long-term inactivity.

1. Ensure the compressed air is filtered (particle size ≤ 5μm) before entering the valve; 2. Inspect the anti-corrosive coating of the valve body monthly; touch up with paint if damaged; 3. Replace the sealing ring every 6 months; 4. Operate the valve manually once a week when the platform is not in use for a long time to prevent valve core sticking; 5. Avoid knocking the valve body to prevent internal component damage.