Parts Classification for Mast Foundation Assembly Z04230000010AA

1

Mast foundation assembly

Z04230000010AA

High-strength alloy steel (Q355B), surface anti-corrosion coated

1. Fatigue from long-term static/dynamic load bearing; 2. Corrosion from soil moisture and drilling fluid; 3. Deformation from uneven load distribution.

1. Inspect for weld cracks quarterly per GB/T 11345-2013; 2. Ensure uniform load distribution during mast installation; 3. Touch up anti-corrosion coating annually.

2

Mast foundation body

Z04230200006AA

Heavy-duty carbon structural steel (Q235B), normalized treatment

1. Impact damage during transport/installation; 2. Localized wear from ground friction; 3. Corrosion from underground moisture.

1. Use protective padding during transport to avoid impact; 2. Level installation surface to reduce ground friction; 3. Apply anti-rust paint to bottom surface before installation.

1

Connection unit

Z04110000011AA

Alloy steel (Q345D), precision-machined

1. Wear at connection interfaces from load transmission; 2. Fatigue from repeated vibration; 3. Corrosion from outdoor exposure.

1. Lubricate connection interfaces monthly with extreme-pressure grease; 2. Inspect for dimensional deviation quarterly; 3. Tighten connecting bolts regularly to reduce vibration.

2

Screw stem M42X1050

4400200456

High-strength alloy steel (10.9 grade), galvanized

1. Thread wear from repeated adjustment; 2. Bending deformation from uneven torque; 3. Corrosion at thread roots.

1. Use calibrated torque wrench (tighten to 850-900N·m); 2. Apply anti-rust thread compound before installation; 3. Avoid over-adjustment to prevent thread damage.

3

Screw stem M42X950

4400200455

High-strength alloy steel (10.9 grade), galvanized

1. Fatigue from long-term load-bearing; 2. Thread damage from improper alignment during installation; 3. Corrosion from humid environments.

1. Ensure precise alignment before installation; 2. Inspect thread integrity before use; 3. Cover with protective caps when not in use to prevent debris accumulation.

4

Screw stem M52X340

P6040716AA

High-strength alloy steel (12.9 grade), galvanized

1. Over-tightening leading to thread deformation; 2. Wear from high load transmission; 3. Corrosion from drilling fluid splashes.

1. Strictly follow rated torque (1200-1250N·m); 2. Clean thread surfaces after drilling operations; 3. Replace if thread wear exceeds 0.1mm.

1

Pad eye

4400200456

Carbon steel (Q235A), welded and galvanized

1. Wear at lifting point from rope friction; 2. Weld fatigue from repeated lifting; 3. Corrosion from outdoor exposure.

1. Use wear-resistant sleeves during lifting; 2. Inspect weld integrity before each use per GB/T 11345-2013; 3. Apply anti-corrosion grease to lifting points monthly.

2

Pad eye II

Z04230100003AA

Alloy steel (Q345D), forged and galvanized

1. Overload during lifting; 2. Localized fatigue at stress concentration points; 3. Corrosion from soil and moisture.

1. Strictly follow rated lifting capacity (avoid overload by ≥10%); 2. Inspect for stress cracks monthly; 3. Clean and dry after use in humid environments.

3

Pad eye

4400200457

Carbon steel (Q235A), welded and galvanized

1. Friction wear from lifting ropes; 2. Weld corrosion leading to strength reduction; 3. Impact damage during handling.

1. Avoid rope slipping during lifting to reduce friction; 2. Touch up weld anti-corrosion coating quarterly; 3. Handle gently to prevent impact damage.

4

Pad eye

P6040731AA

Alloy steel (Q345D), forged and galvanized

1. Fatigue from repeated lifting operations; 2. Corrosion from drilling fluid splashes; 3. Wear at connection points.

1. Rotate pad eyes for alternating use to reduce fatigue; 2. Clean drilling fluid residues weekly; 3. Inspect connection tightness before each lifting operation.

5

Pad eye

P6001497AA

Carbon steel (Q235A), welded and galvanized

1. Stress concentration leading to cracking; 2. Corrosion from long-term outdoor exposure; 3. Wear from auxiliary hanging operations.

1. Avoid using for loads exceeding rated capacity; 2. Apply anti-rust paint annually; 3. Inspect for cracks monthly, replace if present.

1

What standards apply to the Z04230000010AA mast foundation assembly, and how to verify part compatibility?

Comply with API Spec 4F, GB/T 3077-2015, and GB/T 3098.1-2010. Verify part numbers and dimensions, ensure fasteners match rated strength, and confirm load-bearing components meet rig mast weight requirements.

2

How to maintain pad eyes to prevent weld fatigue and corrosion?

Inspect welds per GB/T 11345-2013 monthly, repair cracks promptly. Apply anti-corrosion grease to lifting points monthly, touch up galvanized coating annually, and avoid overload during lifting.

3

When should screw stems (e.g., M42X1050, M52X340) be replaced?

Replace if thread wear exceeds 0.1mm, if bending deformation is detected, or if corrosion affects thread integrity. For frequent use, replace every 2000 working hours to avoid locking failure.