Parts for XQ1146YB Drilling Rig

1

XYQ6B.Z-34

Alloy Steel 42CrMo with Carburizing & Quenching (Surface Hardness HRC 58-62)

1. Fatigue wear of the transmission tooth surface due to long-term high-torque meshing; 2. Abrasive wear caused by drilling fluid and sand particle intrusion into the meshing gap

1. Use API-specified anti-wear lubricating oil and replace the oil filter every 500 operating hours; 2. Install a high-precision debris filter in the transmission system to prevent particle intrusion

2

XYQ6B.Z-32

High-Strength Ductile Iron GGG70 with Tempering Treatment

1. Stress concentration cracking caused by uneven installation and bolt preload; 2. Corrosion pitting on the outer surface due to long-term exposure to humid and corrosive field environments

1. Use a torque wrench to uniformly tighten bolts according to the specified torque (450±20 N·m); 2. Apply epoxy anti-corrosion coating to exposed surfaces and re-touch every 6 months

3

XYQ6B.Z-35

Stainless Steel 1Cr18Ni9Ti with Precision Grinding

1. Sealing surface wear due to frequent opening and closing operations; 2. Thermal deformation caused by rapid temperature changes in the drilling fluid circulation system

1. Apply high-temperature resistant fluororubber sealant to the sealing surface during maintenance; 2. Control the drilling fluid temperature rise rate within 5℃/min to avoid thermal shock

4

XYQ6B.Z-43

Alloy Steel 20CrMnTi with Carburizing & Grinding

1. Tooth breakage caused by sudden impact loads during emergency drilling stop; 2. Pitting corrosion on the tooth surface due to poor lubrication oil film formation

1. Avoid sudden start-stop operations under full load and maintain a smooth speed transition; 2. Ensure the lubricating oil level is within the standard range (1/2-2/3 of the oil sight glass) and check the oil pressure regularly

5

XYQ6B.Z-36

Carbon Steel 45# with Phosphating & Oil Immersion Treatment

1. Wear of the keyway due to misalignment during power transmission; 2. Corrosion of the phosphating layer due to moisture intrusion into the housing

1. Check the coaxiality of the connected shaft and component monthly, with a tolerance not exceeding 0.02mm; 2. Regularly inspect the housing seal and replace the O-ring if oil leakage is found

6

XYQ6B.Z-33

Aluminum Alloy 6061-T6 with Anodizing

1. Wear of the sliding guide surface due to frequent friction; 2. Anodized layer peeling caused by impact from falling rocks and debris

1. Apply molybdenum disulfide solid lubricant to the guide surface every 200 operating hours; 2. Install a metal protective cover around the component to prevent impact damage

7

XYQ6B.Z-37

Alloy Steel 35CrMo with Forging & Heat Treatment

1. Torsional fatigue deformation due to long-term cyclic load; 2. Corrosion caused by hydrogen embrittlement in hydrogen-rich wellbore environments

1. Monitor the load fluctuation range, ensuring it does not exceed ±10% of the rated load; 2. Conduct hydrogen embrittlement relief heat treatment after 1000 hours of operation in hydrogen-rich wells

8

XYQ6B.Z-40

Polyamide 66 with Glass Fiber Reinforcement (30% GF)

1. Thermal aging and brittleness caused by long-term operation at 80℃+; 2. Fracture due to overload beyond the rated load (15kN)

1. Avoid installing the component near high-temperature zones (e.g., exhaust pipes) and maintain ventilation; 2. Strictly follow the load limit and install a load sensor for real-time monitoring

9

XYQ6B.Z-38

Stainless Steel 304L with Polishing Treatment

1. Corrosion caused by chloride ions in offshore drilling saltwater; 2. Thread wear due to repeated assembly and disassembly

1. Use chloride-free cleaning agents and apply anti-salt spray coating for offshore operations; 2. Use thread protectors during assembly/disassembly and avoid over-tightening (torque ≤ 280 N·m)

10

XYQ6B.Z-41

Alloy Steel 40Cr with Nitriding Treatment

1. Wear of the nitrided layer due to sliding friction; 2. Fatigue cracking caused by cyclic bending loads

1. Apply wear-resistant ceramic coating to the sliding contact surface; 2. Conduct ultrasonic flaw detection every 800 operating hours to detect microcracks

11

XYQ6B.Z-42

Carbon Steel Q355B with Anti-Corrosion Plating

1. Plating peeling due to vibration and impact during transportation; 2. Deformation caused by uneven load bearing

1. Use shock-absorbing packaging during transportation and fix the component with positioning pins during installation; 2. Ensure the load is evenly distributed on the bearing surface, with no local stress concentration

12

XYQ6B.Z-20

Titanium Alloy TC4 for High-Pressure Applications

1. Sealing surface erosion due to high-pressure drilling fluid scouring; 2. Microcracks caused by thermal fatigue under alternating temperature conditions

1. Replace the high-pressure seal ring every 300 operating hours and check the sealing surface for scratches; 2. Control the temperature change rate to ≤ 3℃/min to avoid thermal fatigue

13

XYQ6B.Z-6

Alloy Steel 40MnB with Quenching & Tempering

1. Fracture due to impact load during drilling bit replacement; 2. Corrosion caused by chemical additives in the drilling fluid

1. Install a buffer rubber pad at the impact contact point; 2. Clean the component surface with neutral detergent after each use to remove chemical residues

14

XYQ6B.Z-12

Stainless Steel 1Cr13 with Martensitic Structure

1. Wear of the cutting edge due to repeated cutting operations; 2. Corrosion caused by moisture in the air during storage

1. Sharpen the cutting edge with a diamond grinder every 50 operations, avoiding overheating; 2. Store in a dry, ventilated warehouse with desiccant when not in use

15

XYQ6B.Z-7

Carbon Steel 20# with Seamless Forming

1. Wall thickness reduction due to long-term drilling fluid erosion; 2. Oxidative corrosion caused by oxygen in the fluid

1. Measure the wall thickness quarterly and replace if it is below the minimum limit (3.5mm); 2. Add oxygen scavengers to the drilling fluid system to reduce oxidative corrosion

16

XYQ6B.Z-5

Alloy Steel 40CrNiMoA with Precision Machining

1. Wear of the bearing journal due to insufficient lubrication; 2. Fatigue failure caused by long-term high-speed operation (≥ 1500 rpm)

1. Replenish lithium-based grease every 150 operating hours and clean the lubrication channel; 2. Monitor the operating speed and avoid long-term operation exceeding the rated speed by 10%

17

XYQ6B.Z-56

Polyurethane Elastomer with High Wear Resistance (Shore Hardness D 85)

1. Abrasive wear caused by contact with sand and gravel; 2. UV aging and hardening in outdoor open-air operations

1. Install a wear-resistant steel liner at the gravel contact area; 2. Apply UV-resistant coating to the surface for outdoor use

18

XYQ6B.Z-57

Fiberglass-Reinforced Plastic (FRP) with Epoxy Resin Matrix

1. Delamination caused by moisture absorption in humid environments; 2. Fracture due to impact from heavy objects

1. Seal the component edges with waterproof sealant to prevent moisture intrusion; 2. Avoid placing heavy objects on the component and install protective railings

19

XYQ6B.Z-62

Alloy Steel 25Cr2MoVA with Forging Treatment

1. Creep deformation under high temperature (≥ 200℃) and long-term load; 2. Corrosion caused by sulfur-containing gas in the wellbore

1. Control the operating temperature within the allowable range (≤ 180℃); 2. Use desulfurization agents in the wellbore and conduct corrosion inspection monthly

20

XYQ6B.Z.5

High-Strength Cast Steel GS-20Mn5N

1. Cracking due to casting defects and stress concentration; 2. Wear of the mating surface due to lack of lubrication

1. Conduct magnetic particle flaw detection before installation to eliminate defective products; 2. Apply anti-wear lubricating oil to the mating surface before assembly

21

XYQ6B.Z-66(2)

Stainless Steel 316L with Welding Stabilization Treatment

1. Welding joint corrosion due to improper post-welding heat treatment; 2. Wear of the flow channel due to high-velocity fluid scouring

1. Perform post-welding annealing at 850℃ to stabilize the structure; 2. Optimize the flow channel design to reduce fluid velocity and avoid local scouring

22

XYQ6B.Z-65

Aluminum Bronze QAl9-4 with Anti-Friction Properties

1. Wear of the sliding surface due to metal-to-metal friction; 2. Corrosion caused by seawater in coastal drilling areas

1. Apply anti-friction alloy coating to the sliding surface; 2. Use anti-seawater corrosion paint for coastal operation scenarios

23

XYQ6B.Z-23

Alloy Steel 35CrMoV with Heat Treatment

1. Wear of the gear teeth due to misalignment and improper meshing; 2. Corrosion caused by acidic drilling fluid

1. Adjust the gear meshing gap to 0.15-0.25mm regularly; 2. Use acid-resistant lubricants and monitor the pH value of the drilling fluid (6.5-8.5)

24

XYQ6B.Z-22

Carbon Steel Q275 with Normalizing Treatment

1. Deformation due to uneven heating during welding; 2. Wear of the surface due to friction with soil and sand

1. Adopt symmetric welding and interlayer cooling to reduce deformation; 2. Apply wear-resistant polyurethane paint to the surface for field operation

25

XYQ6B.Z-2

High-Precision Alloy Steel 18CrNiMo7-6

1. Fatigue damage caused by long-term cyclic vibration; 2. Wear of the precision fitting surface due to contamination

1. Install vibration-damping gaskets at the mounting base to reduce vibration transmission; 2. Clean the fitting surface with anhydrous ethanol before assembly to remove contaminants

1

XYQ3B.Z.1-18

High-Strength Steel Q390B with Welding Reinforcement

1. Welding joint cracking due to long-term vibration; 2. Corrosion caused by soil moisture and groundwater immersion

1. Perform vibration aging treatment on the welding joint to eliminate residual stress; 2. Apply anti-corrosion asphalt paint to the buried part and wrap it with geotextile

1

XYQ3C.Z.5

Stainless Steel 304 with Precision Drilling

1. Flow channel blockage due to hydraulic oil contamination; 2. Corrosion of the inner wall due to moisture in the hydraulic system

1. Use high-purity hydraulic oil (NAS 8 grade) and replace the oil filter every 400 operating hours; 2. Install a dryer in the hydraulic system to control the moisture content below 0.02%