TQ340-35Y 30*85 Pin Torque Resistance

1

XQ140/12YA Core Component

XQ140/12YA

40CrNiMoA Alloy Steel (Quenched & Tempered)

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

1

Pin (30*85)

52.500-07A

42CrMo Alloy Steel (Carburized Surface, HRC 58-62)

1. Abrasive wear from repeated component movement; 2. Bending fatigue from uneven load distribution

1. Check pin play monthly (limit to ≤0.02mm); 2. Ensure even load distribution during installation per tong manual

2

TQ340-35Y Core Component

TQ340-35Y

42CrMo Alloy Steel

1. Wear from high-torque pipe make-up/break-out; 2. Stress cracking from thermal expansion in high-temperature wells

1. Operate within 35kN.m rated torque range; 2. Monitor component temperature (keep below 150°C per API 7K Clause 8.5)

1

General Part

Z6-105

35CrMo Alloy Steel

1. Wear from relative movement in compact assembly; 2. Corrosion from drilling fluid pooling in tight spaces

1. Use needle-nose tools for precision lubrication (high-temperature grease, 150°C rated); 2. Drill small drainage holes to prevent fluid accumulation

2

General Part

Z6-100

QT450-10 Ductile Iron

1. Impact damage from pipe handling in confined areas; 2. Fatigue cracking from cyclic load

1. Use guide rails for pipe alignment during insertion; 2. Conduct ultrasonic testing for cracks every 6 months

3

General Part

Z6-98

304 Stainless Steel

1. Pitting corrosion from saltwater exposure; 2. Wear from abrasive particles in fluid

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

4

General Part

Z6-97

40Cr Alloy Steel

1. Torsional fatigue from torque transmission; 2. Wear from inadequate lubrication

1. Lubricate every 200 operating hours with high-pressure grease; 2. Check torque transmission efficiency monthly (≥95% target)

5

Screw (M5*10-4.8)

Z6-21

Carbon Steel (4.8 Grade)

1. Thread stripping from over-tightening; 2. Corrosion from harsh environments

1. Tighten to 5 N·m with torque wrench; 2. Use zinc-plated screws for enhanced corrosion resistance

6

General Part

Z6-128

35CrMo Alloy Steel

1. Shear failure from uneven load distribution; 2. Wear from contact with moving components

1. Ensure full seating in mating component; 2. Inspect contact surfaces for wear (replace if >0.3mm depth)

7

Part (5)

Z6-117

35CrMo Alloy Steel

1. Overload failure from exceeding 5kN rated load; 2. Fatigue wear from cyclic operation

1. Operate within rated load range; 2. Limit continuous use to 2-hour intervals (cool-down period)

8

General Part

Z6-43

40Cr Alloy Steel

1. Impact wear from sudden pipe movement; 2. Corrosion from drilling fluid splashing

1. Operate tongs with gradual speed changes; 2. Clean surface weekly to remove fluid residues

9

General Part

Z6-44

QT450-10 Ductile Iron

1. Wear from contact with pipe surfaces; 2. Corrosion from harsh well environments

1. Apply anti-corrosion coating annually; 2. Inspect contact surfaces monthly

10

Part (5*18)

Z6-50

35CrMo Alloy Steel

1. Shear failure from overloading; 2. Wear from relative movement

1. Ensure even force distribution during installation; 2. Replace proactively after 5,000 operating hours

11

General Part

Z6-61

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

12

RH Threaded Part

Z6-67

40Cr Alloy Steel

1. Thread wear from repeated assembly/disassembly; 2. Torsional fatigue from torque transmission

1. Use anti-seize compound during assembly; 2. Inspect thread integrity monthly

13

Screw (M6*10-4.8)

Z6-126

Carbon Steel (4.8 Grade)

1. Thread galling from improper tightening; 2. Corrosion from moisture

1. Tighten to 8 N·m with torque wrench; 2. Store spare screws in dry, sealed containers

14

General Part

Z6-62

35CrMo Alloy Steel

1. Fatigue wear from cyclic operation; 2. Wear from contaminated lubricant

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

15

LH Threaded Part

Z6-57

40Cr Alloy Steel

1. Thread damage from incorrect tightening direction; 2. Corrosion from drilling fluid

1. Mark LH threads clearly for proper assembly; 2. Strengthen sealing to prevent fluid intrusion

16

General Part

Z6-4

QT450-10 Ductile Iron

1. Thermal stress cracking from high-temperature wells; 2. Wear from contact with moving components

1. Maintain operating temperature below 120°C; 2. Apply high-temperature lubricant to contact surfaces

17

General Part

Z6-131

304 Stainless Steel

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

1. Apply anti-corrosion coating every 6 months; 2. Install high-efficiency filters in fluid systems

18

Motor (BM-D500)

Z6-35

Aluminum Alloy Housing + Copper Windings

1. Overheating from prolonged high-load operation; 2. Damage from drilling fluid intrusion into motor housing

1. Monitor motor temperature (limit to 100°C); 2. Inspect housing seals monthly for integrity

19

General Part

Z6-114

35CrMo Alloy Steel

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

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

20

General Part

Z6-112

40Cr Alloy Steel

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

1. Lubricate with molybdenum disulfide lubricant; 2. Conduct non-destructive testing every 3 months

21

General Part

Z6-72

304 Stainless Steel

1. Corrosion from acidic drilling fluid; 2. Wear from vibration

1. Test fluid pH monthly (maintain 7.5-8.5); 2. Install vibration dampeners

22

General Part

Z6-71

QT450-10 Ductile Iron

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

1. Install rubber bumpers on tong housing; 2. Clean surface weekly

23

Screw (M12*25)

Z6-81

Alloy Steel (8.8 Grade)

1. Thread stripping from over-tightening; 2. Corrosion from harsh environments

1. Tighten to 45 N·m with torque wrench; 2. Use anti-seize compound during assembly

24

General Part

Z6-70

35CrMo Alloy Steel

1. Shear failure from overloading; 2. Wear from inadequate lubrication

1. Operate within rated load; 2. Lubricate every 150 operating hours

25

General Part

Z6-9

40Cr Alloy Steel

1. Fatigue wear from cyclic operation; 2. Corrosion from drilling fluid

1. Replace proactively after 6,000 operating hours; 2. Strengthen sealing to prevent fluid intrusion

26

General Part

Z6-7

304 Stainless Steel

1. Corrosion from chemical additives; 2. Wear from abrasive particles

1. Test fluid additives for compatibility; 2. Clean part weekly to remove debris

27

Flat Key

Z6-89

45# Carbon Steel (Hardened)

1. Shear failure from torque overload; 2. Wear from keyway contact

1. Ensure key is fully seated in keyway; 2. Check keyway wear monthly (replace if >0.1mm depth)

28

General Part

Z6-88

QT450-10 Ductile Iron

1. Impact damage from sudden pipe movement; 2. Fatigue cracking from cyclic load

1. Operate tongs smoothly without violent impact; 2. Conduct ultrasonic testing every 6 months

29

General Part

Z6-85

35CrMo Alloy Steel

1. Wear from relative movement; 2. Corrosion from moisture

1. Apply lubricating oil every 100 operating hours; 2. Store spare parts in dry environment

30

Part (2*10)

Z6-87

35CrMo Alloy Steel

1. Shear failure from overloading; 2. Wear from contact with moving components

1. Operate within 2kN rated load; 2. Inspect contact surfaces monthly

31

General Part

Z6-83

40Cr Alloy Steel

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

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

32

General Part

Z6-96

304 Stainless Steel

1. Pitting corrosion from saltwater; 2. Wear from vibration

1. Rinse with fresh water after offshore use; 2. Install vibration dampeners

33

General Part

Z6-90

QT450-10 Ductile Iron

1. Wear from contact with pipe surfaces; 2. Corrosion from harsh well environments

1. Apply anti-corrosion coating annually; 2. Inspect contact surfaces monthly

34

Screw (M8-05)

Z6-95

Alloy Steel (8.8 Grade)

1. Thread galling from improper tightening; 2. Corrosion from drilling fluid

1. Use anti-seize compound and torque wrench (20 N·m); 2. Inspect threads weekly for corrosion

35

General Part

Z6-84

35CrMo Alloy Steel

1. Fatigue wear from cyclic operation; 2. Wear from inadequate lubrication

1. Lubricate every 150 operating hours; 2. Replace proactively after 5,000 operating hours

36

Part (8-140HV)

Z6-92

Low-Carbon Steel (140HV Hardness)

1. Wear from contact with harder components; 2. Corrosion from moisture

1. Use as specified (avoid contact with high-hardness parts); 2. Apply anti-rust oil after use

37

General Part

Z6-91

40Cr Alloy Steel

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

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

38

General Part

Z6-93

304 Stainless Steel

1. Corrosion from acidic drilling fluid; 2. Wear from abrasive particles

1. Test fluid pH monthly; 2. Install high-efficiency filters in fluid systems

39

Bearing (6305)

Z6-22

GCr15 Bearing Steel (Sealed Type)

1. Dry friction from lubrication loss; 2. Damage from foreign particles entering seal

1. Use sealed bearings with lifetime lubrication; 2. Inspect seal integrity monthly

40

General Part

Z6-20

35CrMo Alloy Steel

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

1. Apply lubricating grease every 200 operating hours; 2. Conduct ultrasonic testing every 6 months

41

General Part

Z6-18

QT450-10 Ductile Iron

1. Impact damage from pipe handling; 2. Corrosion from drilling fluid

1. Use guide rails for pipe alignment; 2. Clean surface weekly to remove fluid residues

42

General Part

Z6-19

40Cr Alloy Steel

1. Torsional fatigue from torque transmission; 2. Wear from inadequate lubrication

1. Lubricate every 150 operating hours; 2. Check torque transmission efficiency monthly

43

General Part

Z6-16

304 Stainless Steel

1. Pitting corrosion from saltwater; 2. Wear from vibration

1. Apply anti-corrosion coating every 6 months; 2. Install vibration dampeners

44

Part (φ4*25.8)

Z6-17

35CrMo Alloy Steel

1. Shear failure from overloading; 2. Wear from relative movement

1. Operate within rated load; 2. Ensure proper installation to bear force evenly

45

General Part

Z6-36

35CrMo Alloy Steel

1. Fatigue wear from cyclic operation; 2. Corrosion from drilling fluid intrusion

1. Replace proactively after 4,000 operating hours; 2. Strengthen sealing to prevent fluid intrusion

1

ZQ203-100 Replacement Part

ZQ203-100

40CrNiMoA Alloy Steel

1. Fatigue wear from continuous operation; 2. Corrosion from H₂S in sour wells

1. Rotate spare parts every 6 months (prevent static corrosion); 2. Use NACE MR0175-compliant materials for sour service

2

XYQ3B Replacement Part

XYQ3B

QT500-7 Ductile Iron

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

1. Install impact-absorbing pads; 2. Inspect contact surfaces monthly

3

XYQ6G Replacement Part

XYQ6G

35CrMo Alloy Steel

1. Shear failure from over-torque; 2. Corrosion from drilling fluid

1. Use torque limiters to prevent over-torque; 2. Replace sealing components quarterly

4

XQ3F Replacement Part

XQ3F

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

5

XYQ6B Replacement Part

XYQ6B

40Cr Alloy Steel

1. Torsional fatigue from cyclic torque; 2. Corrosion from harsh environments

1. Limit continuous operation to 3-hour intervals; 2. Apply anti-corrosion coating annually

6

XQ89/3YC Replacement Part

XQ89/3YC

42CrMo Alloy Steel

1. Overload failure from exceeding rated torque; 2. Wear from high-speed rotation

1. Operate within 3YC-rated torque range; 2. Inspect rotational components for runout (±0.02mm tolerance)