XQ140/12YA Spring Seats Fatigue Deformation Resistance

1

General Component

12AZ-38

35CrMo Alloy Steel

1. Torsional fatigue from cyclic torque transmission; 2. Corrosion from drilling fluid intrusion

1. Inspect for micro-cracks monthly via magnetic particle testing; 2. Lubricate with corrosion-resistant grease (NLGI Grade 2) every 150 operating hours

2

General Component

12AZ-89

QT500-10 Ductile Iron

1. Impact damage from sudden pipe movement; 2. Wear from contact with moving components

1. Install rubber bumpers on component surfaces; 2. Apply molybdenum disulfide lubricant to contact areas

3

General Component

12AZ-271

304 Stainless Steel

1. Pitting corrosion from saltwater in offshore operations; 2. Wear from abrasive particles

1. Rinse with fresh water after offshore use; 2. Install particle filters in fluid lines

4

General Component

12AY-1.19

40CrNiMoA Alloy Steel

1. Torsional fatigue from high torque transmission; 2. Corrosion from H₂S in sour wells

1. Operate within rated torque range; 2. Use NACE MR0175-compliant coating for sour service

5

General Component

12AZ-144

35CrMo Alloy Steel

1. Shear failure from uneven load distribution; 2. Wear from contaminated lubricant

1. Ensure even load bearing during installation; 2. Replace lubricant every 300 operating hours

6

General Component

12AZ-42

QT450-10 Ductile Iron

1. Thermal stress cracking from high-temperature wells; 2. Wear from fluid splashing

1. Maintain operating temperature below 120°C; 2. Clean surface weekly to remove fluid residues

7

General Component

12AZ-24

Q355B Carbon Steel

1. Corrosion from atmospheric moisture; 2. Weld fatigue from vibration (if welded)

1. Apply anti-corrosion paint (epoxy primer + polyurethane topcoat) annually; 2. Inspect weld seams monthly for cracks

8

General Component

12AZ-262

304 Stainless Steel

1. Corrosion from chemical drilling fluid additives; 2. Wear from cyclic vibration

1. Test fluid additives for compatibility quarterly; 2. Install vibration dampeners

9

General Component

12AB-4

35CrMo Alloy Steel

1. Abrasive wear from debris in fluid; 2. Fatigue cracking from cyclic stress

1. Install debris filters in fluid lines; 2. Conduct ultrasonic testing every 6 months

10

Screw (M8*15)

12AZ-96

Alloy Steel (8.8 Grade)

1. Thread stripping from over-tightening; 2. Fatigue failure from cyclic vibration

1. Tighten to 28 N·m with torque wrench; 2. Use lock washers to prevent loosening

11

General Component

12AB-31

35CrMo Alloy Steel

1. Wear from relative movement with mating components; 2. Corrosion from drilling fluid

1. Apply lubricant to contact surfaces; 2. Install seals to prevent fluid intrusion

12

Screw (M12)

12AB-110

Alloy Steel (8.8 Grade)

1. Thread galling from improper assembly; 2. Corrosion from humidity

1. Use anti-seize compound during assembly; 2. Inspect threads monthly for corrosion

13

Screw (M24*1.5)

12AY-7

Alloy Steel (10.9 Grade)

1. Shear failure from excessive load; 2. Thread damage from mishandling

1. Operate within load capacity (max 25kN); 2. Use proper wrench to avoid cross-threading

14

General Component

12AZ-127

QT500-10 Ductile Iron

1. Impact damage from pipe handling; 2. Wear from fluid splashing

1. Install protective guards; 2. Clean surface weekly to remove fluid residues

15

General Component

12AY-1.18

40CrNiMoA Alloy Steel

1. Torsional fatigue from cyclic torque; 2. Corrosion from H₂S in sour wells

1. Inspect for fatigue cracks monthly; 2. Use NACE MR0175-compliant coating

16

General Component

12AZ-1

304 Stainless Steel

1. Pitting corrosion from saltwater; 2. Wear from abrasive particles

1. Rinse with fresh water after offshore use; 2. Install high-efficiency filters in fluid systems

17

General Component

12AY-1.4

35CrMo Alloy Steel

1. Shear failure from uneven load distribution; 2. Wear from contaminated lubricant

1. Ensure even load bearing during installation; 2. Replace lubricant every 300 operating hours

18

Screw (M6*10)

12AZ-82

Alloy Steel (8.8 Grade)

1. Thread stripping from over-tightening; 2. Fatigue failure from vibration

1. Tighten to 8 N·m with torque wrench; 2. Use lock washers to prevent loosening

19

Screw (M8*10)

12AZ-19

Alloy Steel (8.8 Grade)

1. Thread damage from improper screwdriver use; 2. Corrosion from moisture

1. Use screwdriver with matching head size; 2. Apply anti-corrosion oil to threads

20

Screw (M5*10)

12AZ-55

Alloy Steel (8.8 Grade)

1. Shear failure from excessive load; 2. Thread wear from frequent disassembly

1. Operate within load capacity (max 4kN); 2. Minimize unnecessary disassembly

21

General Component

12AZ-219

304 Stainless Steel

1. Corrosion from chemical drilling fluid additives; 2. Wear from vibration

1. Test fluid additives for compatibility quarterly; 2. Install vibration dampeners

22

General Component

12AZ-129

35CrMo Alloy Steel

1. Wear from relative movement with mating components; 2. Fatigue cracking from cyclic stress

1. Apply molybdenum disulfide lubricant to contact surfaces; 2. Conduct non-destructive testing every 3 months

23

General Component

12AY-1.7

40CrNiMoA Alloy Steel

1. Torsional fatigue from high torque; 2. Corrosion from drilling fluid

1. Operate within rated torque range; 2. Apply anti-corrosion grease every 150 operating hours

24

General Component

12AB-266

QT500-10 Ductile Iron

1. Impact damage from sudden pipe movement; 2. Wear from fluid splashing

1. Install rubber bumpers; 2. Clean surface weekly to remove fluid residues

25

General Component

12AZ-86

304 Stainless Steel

1. Pitting corrosion from saltwater; 2. Wear from abrasive particles

1. Rinse with fresh water after offshore use; 2. Install particle filters in fluid lines

26

Pin

12AZ-88

35CrMo Alloy Steel (Carburized Surface)

1. Wear from relative movement with mating components; 2. Corrosion from drilling fluid intrusion

1. Apply anti-wear lubricant to pin surfaces; 2. Install seals to prevent fluid intrusion

27

General Component

12AY-1.3

35CrMo Alloy Steel

1. Shear failure from uneven load; 2. Fatigue cracking from cyclic stress

1. Ensure even load bearing during installation; 2. Conduct non-destructive testing every 3 months

28

General Component

12AZ-51

QT450-10 Ductile Iron

1. Thermal stress cracking from high-temperature wells; 2. Wear from fluid splashing

1. Maintain operating temperature below 120°C; 2. Clean surface weekly

29

General Component

12AZ-7

Q355B Carbon Steel

1. Corrosion from atmospheric moisture; 2. Wear from debris

1. Apply anti-corrosion paint annually; 2. Install debris shields

30

Component (A40*1.5)

12AB-102

40CrNiMoA Alloy Steel

1. Torsional fatigue from cyclic torque; 2. Corrosion from H₂S in sour wells

1. Operate within rated torque range; 2. Use NACE MR0175-compliant coating

31

General Component

12AZ-85

35CrMo Alloy Steel

1. Wear from relative movement with mating components; 2. Corrosion from drilling fluid

1. Apply lubricant to contact surfaces; 2. Install seals to prevent fluid intrusion

32

Spring Seat

12AZ-222

42CrMo Alloy Steel (Heat-Treated)

1. Wear from spring compression cycles; 2. Corrosion from moisture intrusion

1. Inspect seat surface for wear monthly (replace if wear depth >0.3mm); 2. Apply anti-corrosion grease to seat surfaces

33

Spring Seat

12AZ-220

42CrMo Alloy Steel (Heat-Treated)

1. Fatigue deformation from repeated spring loads; 2. Corrosion from drilling fluid

1. Monitor spring load (maintain within 5-8kN); 2. Clean seat weekly and reapply lubricant

34

General Component

12AZ-272

304 Stainless Steel

1. Corrosion from chemical drilling fluid additives; 2. Wear from vibration

1. Test fluid additives for compatibility quarterly; 2. Install vibration dampeners

35

Spring Washer

12AZ-146

65Mn Spring Steel

1. Elastic fatigue from repeated compression; 2. Corrosion from moisture

1. Replace washers proactively every 5,000 compression cycles; 2. Apply anti-corrosion oil after washdown

36

Gear Plunger

12AB-107

40Cr Alloy Steel (Heat-Treated HRC 45-50)

1. Abrasive wear from gear meshing; 2. Corrosion from hydraulic oil contamination

1. Use clean hydraulic oil (NAS 8 class or higher); 2. Inspect plunger surface monthly for wear

37

General Component

12AZ-211

35CrMo Alloy Steel

1. Torsional fatigue from cyclic torque; 2. Wear from contaminated lubricant

1. Inspect for fatigue cracks monthly; 2. Replace lubricant every 300 operating hours

38

General Component

12AZ-36

QT500-10 Ductile Iron

1. Impact damage from pipe handling; 2. Wear from fluid splashing

1. Install protective guards; 2. Clean surface weekly to remove fluid residues

39

General Component

12AZ-249

304 Stainless Steel

1. Pitting corrosion from saltwater; 2. Wear from abrasive particles

1. Rinse with fresh water after offshore use; 2. Install particle filters in fluid lines

1

Nut (M12)

- (TQ35)

Alloy Steel (8.8 Grade)

1. Thread stripping from over-tightening; 2. Corrosion from humidity and drilling fluid

1. Tighten to 45 N·m with torque wrench; 2. Use anti-seize compound and protective caps

2

Bearing (22212C/W33)

- (TQ35)

GCr15 Bearing Steel (Inner/Outer Ring + Rolling Elements)

1. Fatigue failure from high load and rotation speed; 2. Abrasive wear from contaminated lubricant

1. Use high-quality bearing grease (ISO VG 32) and maintain cleanliness; 2. Monitor rotation speed (limit to 2800 rpm)

3

Pin

XYQ3C.HD-5 (TQ340/35Y)

35CrMo Alloy Steel (Carburized Surface)

1. Wear from relative movement with mating components; 2. Corrosion from drilling fluid intrusion

1. Apply anti-wear lubricant to pin surfaces; 2. Install seals to prevent fluid intrusion

4

General Component

63.04-03 (TQ340-35Y)

40CrNiMoA Alloy Steel

1. Torsional fatigue from extreme torque transmission; 2. Corrosion from H₂S in sour wells

1. Operate within rated torque range; 2. Use NACE MR0175-compliant coating

1

XQ114/6YB Replacement Part

XQ114/6YB

35CrMo Alloy Steel / 304 Stainless Steel

1. Wear from compact-space assembly stress; 2. Corrosion from drilling fluid pooling

1. Use precision installation tools; 2. Drill small drainage holes to prevent fluid accumulation

2

ZQ203-100 Replacement Part

ZQ203-100

27SiMn Alloy Steel / WC-Co Cemented Carbide

1. Wear from high hydraulic pressure; 2. Corrosion from hydraulic oil contamination

1. Maintain hydraulic oil cleanliness; 2. Replace seals proactively

3

XYQ3B Replacement Part

XYQ3B

35CrMo Alloy Steel

1. Torsional fatigue from cyclic torque; 2. Corrosion from drilling fluid

1. Inspect for fatigue cracks monthly; 2. Apply anti-corrosion grease regularly

4

XYQ6G Replacement Part

XYQ6G

304 Stainless Steel

1. Pitting corrosion from saltwater; 2. Wear from abrasive particles

1. Rinse with fresh water after offshore use; 2. Install particle filters

5

XQ3F Replacement Part

XQ3F

Alloy Steel (8.8 Grade)

1. Thread stripping from over-tightening; 2. Fatigue failure from vibration

1. Tighten to specified torque; 2. Use lock washers

6

XYQ6B Replacement Part

XYQ6B

QT500-10 Ductile Iron

1. Impact damage from pipe handling; 2. Wear from fluid splashing

1. Install protective guards; 2. Clean surfaces weekly

7

XQ893YC Replacement Part

XQ893YC

40CrNiMoA Alloy Steel / WC-Co Cemented Carbide

1. Wear from heavy-duty pipe clamping; 2. Corrosion from H₂S in sour wells

1. Inspect for wear monthly; 2. Use NACE MR0175-compliant coating