ZJ40 Drilling Rig Mast Base Parts

1

Mast base

Z04150000017AA

Alloy Steel (Q355B) with Shot Blasting Treatment

1. Stress concentration under long-term heavy load; 2. Corrosion from drilling fluid and outdoor exposure; 3. Welding joint fatigue.

1. Conduct quarterly magnetic particle inspection for cracks; 2. Touch up anti-corrosion paint on welding joints; 3. Ensure level installation to avoid uneven force.

2

Front leg seat

Z04150200002AA

Alloy Steel (40Cr)

1. Wear from front leg rotation and friction; 2. Deformation from impact during transportation; 3. Stress cracking under dynamic load.

1. Apply molybdenum disulfide lubricant to contact surfaces; 2. Secure with padding during transportation; 3. Check fit clearance with front leg monthly.

3

Front leg

P9840505AA

Alloy Steel (Q355B)

1. Bending deformation from uneven load; 2. Corrosion and rust; 3. Welding joint detachment under repeated stress.

1. Avoid overloading beyond design capacity (complying with API Spec 7K); 2. Regularly clean and apply anti-rust grease; 3. Inspect welding joints for cracks monthly.

4

Rear leg

P9840506AA

Alloy Steel (Q355B)

1. Fatigue fracture from alternating load; 2. Corrosion by drilling fluid; 3. Deformation from improper installation.

1. Conduct semi-annual ultrasonic testing; 2. Clean surface stains promptly; 3. Align with mast base strictly during installation.

5

Support, driller's control box

P7100019AA

Carbon Steel (Q235A)

1. Impact damage from equipment or debris; 2. Corrosion in humid drilling environment; 3. Deformation from uneven weight bearing.

1. Install protective baffle around the support; 2. Apply anti-rust paint annually; 3. Ensure the control box is mounted evenly.

1

Turnbuckle

Z04150300001AA

Alloy Steel (35CrMoA)

1. Thread wear from frequent adjustment; 2. Corrosion leading to seizing; 3. Fatigue fracture from over-tightening.

1. Apply anti-seize agent to threads before use; 2. Adjust torque per API Spec 8C standard; 3. Clean threads after each adjustment.

2

Turnbuckle

P1200379AA

Alloy Steel (35CrMoA)

1. Thread wear from frequent adjustment; 2. Corrosion leading to seizing; 3. Fatigue fracture from over-tightening.

1. Apply anti-seize agent to threads before use; 2. Adjust torque per API Spec 8C standard; 3. Clean threads after each adjustment.

3

Side brace

P9840508AA

Carbon Steel (Q235B)

1. Bending deformation from lateral force; 2. Welding joint fatigue; 3. Corrosion by outdoor environment.

1. Avoid lateral impact during operation; 2. Inspect welding joints monthly; 3. Touch up anti-rust paint when peeling occurs.

4

Side cross support

P9840507AA

Alloy Steel (Q355B)

1. Stress concentration under heavy load; 2. Deformation from uneven force distribution; 3. Corrosion from drilling fluid.

1. Check for deformation quarterly; 2. Ensure uniform load distribution; 3. Clean and apply anti-corrosion grease regularly.

5

Cross support L2200

P9941403AA

Alloy Steel (Q355B)

1. Fatigue cracking from alternating load; 2. Wear at connection points; 3. Deformation from transportation impact.

1. Secure with protective sleeves during transportation; 2. Inspect connection points for wear monthly; 3. Conduct semi-annual crack detection.

6

Reinforced support

P9941402AA

Alloy Steel (40Cr)

1. Local wear from concentrated load; 2. Welding joint detachment; 3. Corrosion and rust.

1. Add wear-resistant pads at load-bearing points; 2. Inspect welding quality quarterly; 3. Apply anti-rust coating after cleaning.

7

Reinforced support

P6004241AA

Alloy Steel (40Cr)

1. Local wear from concentrated load; 2. Welding joint detachment; 3. Corrosion and rust.

1. Add wear-resistant pads at load-bearing points; 2. Inspect welding quality quarterly; 3. Apply anti-rust coating after cleaning.

8

Reinforced support

P9840189AA

Alloy Steel (40Cr)

1. Local wear from concentrated load; 2. Welding joint detachment; 3. Corrosion and rust.

1. Add wear-resistant pads at load-bearing points; 2. Inspect welding quality quarterly; 3. Apply anti-rust coating after cleaning.

1

Base plate

P6200156AA

Carbon Steel (Q235B) with Anti-slip Surface

1. Wear from long-term load-bearing friction; 2. Corrosion by ground moisture; 3. Deformation from uneven ground contact.

1. Ensure ground is level before installation; 2. Clean surface stains regularly; 3. Replace if anti-slip layer is worn.

2

Base plate 160X120

P6004239AA

Carbon Steel (Q235B)

1. Local deformation from concentrated load; 2. Corrosion from drilling fluid; 3. Wear at connection points.

1. Distribute load evenly with gaskets; 2. Clean and apply anti-rust paint monthly; 3. Inspect connection points for looseness.

3

Reinforcing plate

P6202003AA

Alloy Steel (Q355B)

1. Welding joint fatigue; 2. Wear from structural friction; 3. Corrosion and rust.

1. Inspect welding joints for cracks monthly; 2. Apply lubricant at friction points; 3. Touch up anti-corrosion coating when needed.

4

Reinforcing plate

P6202001AA

Alloy Steel (Q355B)

1. Welding joint fatigue; 2. Wear from structural friction; 3. Corrosion and rust.

1. Inspect welding joints for cracks monthly; 2. Apply lubricant at friction points; 3. Touch up anti-corrosion coating when needed.

5

Steel plate 194X160

P6004240AA

Carbon Steel (Q235A)

1. Impact damage from debris; 2. Corrosion in humid environment; 3. Bending deformation from external force.

1. Install protective cover above; 2. Apply anti-rust paint annually; 3. Avoid collision with heavy equipment.

6

Steel plate

P6202002AA

Carbon Steel (Q235A)

1. Impact damage from debris; 2. Corrosion in humid environment; 3. Bending deformation from external force.

1. Install protective cover above; 2. Apply anti-rust paint annually; 3. Avoid collision with heavy equipment.

7

Steel plate

P9970969AA

Carbon Steel (Q235A)

1. Impact damage from debris; 2. Corrosion in humid environment; 3. Bending deformation from external force.

1. Install protective cover above; 2. Apply anti-rust paint annually; 3. Avoid collision with heavy equipment.

8

Steel plate

P6216676AA

Carbon Steel (Q235A)

1. Impact damage from debris; 2. Corrosion in humid environment; 3. Bending deformation from external force.

1. Install protective cover above; 2. Apply anti-rust paint annually; 3. Avoid collision with heavy equipment.

9

Steel plate

P991001490AA

Carbon Steel (Q235A)

1. Impact damage from debris; 2. Corrosion in humid environment; 3. Bending deformation from external force.

1. Install protective cover above; 2. Apply anti-rust paint annually; 3. Avoid collision with heavy equipment.

10

Steel plate 200X140

P6004242AA

Carbon Steel (Q235B)

1. Local wear from concentrated load; 2. Corrosion from drilling fluid; 3. Deformation from uneven force.

1. Use gaskets to distribute load; 2. Clean and apply anti-rust grease monthly; 3. Inspect flatness quarterly.

11

Steel plate 2300X150

P6004243AA

Carbon Steel (Q235B)

1. Bending deformation from long-term load; 2. Welding joint fatigue; 3. Corrosion and rust.

1. Ensure uniform load distribution; 2. Inspect welding joints monthly; 3. Apply anti-corrosion paint annually.

12

Steel plate 2300X120

P6004244AA

Carbon Steel (Q235B)

1. Bending deformation from long-term load; 2. Welding joint fatigue; 3. Corrosion and rust.

1. Ensure uniform load distribution; 2. Inspect welding joints monthly; 3. Apply anti-corrosion paint annually.

13

Steel plate 676X88

P991001490AA

Carbon Steel (Q235A)

1. Impact damage from small debris; 2. Corrosion in humid environment; 3. Wear at connection points.

1. Clean surface regularly; 2. Apply anti-rust paint every 6 months; 3. Check connection tightness monthly.

14

Steel pipe

P2100045AA

Carbon Steel (Q235A) with Galvanized Treatment

1. Galvanization wear leading to corrosion; 2. Impact deformation; 3. Blockage by debris.

1. Repair galvanized layer if worn; 2. Avoid collision during operation; 3. Clean inner cavity quarterly.

15

Steel pipe

Z04010900002AA

Carbon Steel (Q235A) with Galvanized Treatment

1. Galvanization wear leading to corrosion; 2. Impact deformation; 3. Blockage by debris.

1. Repair galvanized layer if worn; 2. Avoid collision during operation; 3. Clean inner cavity quarterly.

1

Pad eye

P6001076AA

Alloy Steel (35CrMoA)

1. Wear at lifting points; 2. Fatigue cracking from repeated lifting; 3. Corrosion by drilling fluid.

1. Inspect lifting points for wear before use; 2. Avoid overloading beyond rated capacity; 3. Apply anti-corrosion grease after use.

2

Pad eye

P7100018AA

Alloy Steel (35CrMoA)

1. Wear at lifting points; 2. Fatigue cracking from repeated lifting; 3. Corrosion by drilling fluid.

1. Inspect lifting points for wear before use; 2. Avoid overloading beyond rated capacity; 3. Apply anti-corrosion grease after use.

3

Padeye

P6000320AA

Alloy Steel (35CrMoA)

1. Wear at lifting points; 2. Fatigue cracking from repeated lifting; 3. Corrosion by drilling fluid.

1. Inspect lifting points for wear before use; 2. Avoid overloading beyond rated capacity; 3. Apply anti-corrosion grease after use.

4

Padeye

4300812050

Alloy Steel (35CrMoA)

1. Wear at lifting points; 2. Fatigue cracking from repeated lifting; 3. Corrosion by drilling fluid.

1. Inspect lifting points for wear before use; 2. Avoid overloading beyond rated capacity; 3. Apply anti-corrosion grease after use.

5

Padeye

Z04150100005AA

Alloy Steel (35CrMoA)

1. Wear at lifting points; 2. Fatigue cracking from repeated lifting; 3. Corrosion by drilling fluid.

1. Inspect lifting points for wear before use; 2. Avoid overloading beyond rated capacity; 3. Apply anti-corrosion grease after use.

6

Bolt M12X50

4309300012

Carbon Steel (45#)

1. Thread wear from vibration; 2. Fatigue fracture from over-tightening; 3. Corrosion by drilling fluid.

1. Tighten to standard torque (40-45 N·m); 2. Use lock washers to prevent loosening; 3. Apply anti-rust adhesive to threads.

7

Nut M12

4313100012

Carbon Steel (45#)

1. Thread stripping from vibration; 2. Corrosion leading to seizing; 3. Wear from repeated disassembly.

1. Replace together with bolts; 2. Apply anti-seize agent to threads; 3. Re-tighten after 100 hours of operation.

8

Spring washer 12

4313100012

65Mn Spring Steel

1. Elastic fatigue from repeated load; 2. Corrosion by drilling fluid; 3. Deformation from over-compression.

1. Replace with bolts and nuts; 2. Clean and apply anti-rust grease before installation; 3. Avoid over-compression during tightening.

9

Pin

P2000058AA

Carbon Steel (45#) with Quenching Treatment

1. Wear from rotational friction; 2. Bending deformation from lateral force; 3. Corrosion and rust.

1. Apply lubricant to surface regularly; 2. Avoid lateral impact; 3. Inspect for bending monthly.

10

Shim

P1000042AA

Stainless Steel (304)

1. Wear from friction between components; 2. Deformation from excessive pressure; 3. Corrosion in humid environment.

1. Replace if thickness wears down by 20%; 2. Ensure proper alignment before installation; 3. Clean surface before use.

11

Safety pin

4101800008

Carbon Steel (Q235A)

1. Fatigue breakage from vibration; 2. Rust and corrosion; 3. Bending from improper insertion.

1. Replace every 3 months; 2. Apply anti-rust oil regularly; 3. Ensure full insertion into pin holes.

12

Oil cup M10X1

P9941403AA

Brass

1. Blockage by lubricant impurities; 2. Thread wear from frequent oil injection; 3. Corrosion by chemical agents.

1. Filter lubricant before injection; 2. Avoid over-tightening during installation; 3. Clean oil cup monthly.

13

Locking unit

Z04150400002AA

Alloy Steel (40Cr)

1. Wear of locking components; 2. Corrosion leading to jamming; 3. Loosening from vibration.

1. Inspect locking performance weekly; 2. Apply lubricant to moving parts; 3. Tighten connection bolts regularly.

1

What standards do these mast base parts comply with?

All parts meet API Spec 7K (Drilling and Production Hoisting Equipment) and GB/T 1591-2018 (Alloy Structural Steels) standards, ensuring compatibility with ZJ40 drilling rigs and compliance with industrial safety requirements.

2

How to handle seized turnbuckles during adjustment?

Do not force adjustment. First, apply penetrating oil to threads and let it sit for 1-2 hours; then gently rotate to loosen. If threads are severely worn, replace the turnbuckle with an original part to avoid structural failure.

3

What is the recommended replacement cycle for key fasteners?

For high-stress fasteners (bolts, pins, safety pins), replace every 6 months; for non-high-stress fasteners, replace annually or when wear, corrosion, or thread damage is found during routine inspections.