Mud Board and Matching Components for ZJ40 Drilling Rig

1

Mud board

Z16180000028AA

High-strength wear-resistant steel Q355B, surface anti-corrosion and anti-wear coating, thickness 12mm, compliant with API Spec 7K

1. Long-term erosion and friction from high-viscosity drilling mud; 2. Impact damage from large solid particles in mud; 3. Corrosion from chemical components in mud.

1. Clean mud residues on the board surface after daily operation to reduce long-term erosion; 2. Inspect the surface coating weekly and touch up anti-wear paint if peeling occurs; 3. Avoid direct impact of large solid particles on the board surface during mud circulation.

2

Mud board

P9000033AA

Wear-resistant carbon steel A36, surface hot-dip galvanizing treatment, corrosion-resistant and impact-resistant, compliant with GB/T 20946-2007

1. Wear of galvanized layer and base material caused by mud friction; 2. Deformation due to uneven stress during installation; 3. Rust and corrosion in humid drilling environments.

1. Ensure uniform stress during installation to avoid local deformation; 2. Clean the board surface with neutral cleaner monthly to prevent mud accumulation; 3. Reapply anti-rust grease to the edge of the galvanized layer if it is damaged.

1

Safety pin 1

P9100177AA

Stainless steel 304, surface polished, diameter 10mm, tensile strength ≥ 520MPa, compliant with API Spec 7K

1. Rust and corrosion caused by long-term contact with drilling mud; 2. Bending deformation due to improper force during insertion and removal; 3. Wear of pin surface caused by frequent disassembly.

1. Use professional tools for insertion and removal to avoid improper force; 2. Clean and apply anti-rust grease to the pin surface after each disassembly; 3. Replace immediately if bending or rust penetration is found.

2

Welding chain 1

Z16180200001AA

High-strength carbon steel chain, surface zinc plating, link diameter 8mm, tensile strength ≥ 800MPa, compliant with ISO 606

1. Chain link wear and deformation caused by long-term bearing and friction; 2. Zinc layer damage and rust caused by mud erosion; 3. Chain breakage due to over-tension during use.

1. Regularly check the chain tension to avoid over-tension; 2. Clean mud residues on chain links weekly to prevent corrosion; 3. Replace the chain if any link is deformed or cracked.

3

Safety pin 2

P9100178AA

Stainless steel 304, surface polished, diameter 8mm, high toughness, compliant with GB/T 119.1-2000

1. Wear of pin hole and surface caused by frequent rotation; 2. Corrosion caused by chemical components in drilling mud; 3. Damage caused by collision with hard objects on site.

1. Avoid collision with hard objects during storage and use; 2. Apply anti-corrosion lubricant to the pin surface monthly; 3. Inspect the pin for wear before each use and replace if necessary.

4

Welding chain 2

Z16180800007AA

High-strength alloy steel chain, surface anti-corrosion electrophoresis coating, link diameter 6mm, wear-resistant and tensile, compliant with API Spec 7K

1. Chain link fatigue and breakage caused by frequent tension and relaxation; 2. Coating damage and corrosion caused by mud and water immersion; 3. Wear caused by friction with other metal components.

1. Reduce frequent tension and relaxation operations as much as possible; 2. Wipe the chain with a dry cloth after contact with mud to keep it dry; 3. Inspect the chain link connection weekly for looseness.

1

Retaining plate assembly

Z04160201002AA

Alloy steel 40Cr, surface quenching treatment, hardness HRC 35-40, integrated assembly, compliant with API Spec 7K

1. Loosening of assembly components caused by rig vibration; 2. Wear of connection surface caused by mud erosion and friction; 3. Fatigue cracking of plate body under long-term load.

1. Tighten all connecting parts monthly to prevent loosening; 2. Clean the assembly surface regularly to remove mud residues; 3. Inspect the plate body for cracks quarterly using magnetic particle testing.

2

Retaining pipe

Z05050100025AA

Seamless steel pipe 20#, surface galvanizing, outer diameter 50mm, wall thickness 5mm, pressure-bearing capacity ≥ 1.6MPa, compliant with GB/T 3091-2015

1. Galvanized layer damage and rust caused by mud erosion; 2. Pipe body deformation due to external impact; 3. Wear of pipe end caused by frequent connection and disassembly.

1. Install protective sleeves at both ends of the pipe to avoid wear; 2. Clean the pipe surface monthly and reapply anti-rust oil if galvanized layer is damaged; 3. Avoid collision with drilling tools and other heavy objects.

3

Rear base

P2000434AA

High-strength cast steel, surface anti-corrosion painting, load-bearing capacity ≥ 5kN, stable structure, compliant with GB/T 20946-2007

1. Base surface wear and corrosion caused by long-term contact with mud and ground; 2. Loosening of fixed bolts caused by rig vibration, leading to uneven stress and deformation; 3. Crack caused by impact of heavy objects.

1. Fix the base firmly with standard bolts and check tightness weekly; 2. Clean the base surface and remove mud accumulation to avoid corrosion; 3. Install a protective pad under the base to reduce ground friction.

1

Pin

P9860066AA

Alloy steel 40Cr, surface chrome plating, diameter 12mm, length 50mm, high toughness, compliant with GB/T 3077-2015

1. Chrome layer peeling and wear caused by frequent rotation and friction; 2. Rust and corrosion caused by mud immersion; 3. Bending deformation due to uneven stress.

1. Lubricate the pin surface with lithium-based grease every 2 weeks to reduce friction; 2. Clean the pin and pin hole before assembly to remove impurities; 3. Replace the pin if chrome layer is severely peeled or bent.

2

Bridge approach

P6003957AA

Carbon steel 45#, surface zinc plating, thickness 10mm, precision machining, compliant with API Spec 7K

1. Wear of connection surface caused by long-term friction; 2. Zinc layer damage and corrosion caused by mud erosion; 3. Deformation due to uneven load during use.

1. Ensure uniform load distribution during installation and use; 2. Clean the connection surface monthly and apply anti-rust grease; 3. Inspect the surface for deformation and wear quarterly.

3

Connection plate 180X145

Z16180300001AA

High-strength steel plate Q355B, surface anti-wear coating, size 180mm×145mm×8mm, compliant with GB/T 700-2006

1. Wear of plate surface and bolt holes caused by mud friction and bolt tightening; 2. Coating damage and corrosion caused by chemical components in mud; 3. Crack caused by excessive stress.

1. Tighten bolts to standard torque to avoid excessive stress; 2. Clean the plate surface after daily use to remove mud; 3. Reapply anti-wear coating if it is peeled off.

4

Connection pad eye

P2400131AA

Alloy steel 40CrNiMoA, surface quenching, tensile strength ≥ 980MPa, integrated forging, compliant with API Spec 7K

1. Wear of pad eye inner hole caused by long-term contact with pin shaft; 2. Fatigue cracking at the stress concentration area under long-term load; 3. Corrosion caused by mud and humid environment.

1. Lubricate the inner hole of the pad eye monthly to reduce friction; 2. Inspect the stress concentration area quarterly for cracks; 3. Clean and apply anti-rust grease regularly to prevent corrosion.

5

Pin shaft

Z16180401001AA

Stainless steel 316, surface polished, diameter 15mm, length 80mm, corrosion-resistant and wear-resistant, compliant with GB/T 1220-2007

1. Surface wear caused by long-term rotation in the pad eye; 2. Corrosion caused by high-salinity drilling mud (especially in coastal areas); 3. Bending deformation due to impact.

1. Inspect the pin shaft for straightness monthly and replace if bent; 2. Clean the pin shaft with fresh water after use in high-salinity environments; 3. Apply anti-corrosion lubricant to the surface regularly.

6

Connection pad eye

P2400131AA

Alloy steel 40CrNiMoA, surface quenching, tensile strength ≥ 980MPa, integrated forging, compliant with API Spec 7K

1. Wear of pad eye inner hole caused by long-term contact with pin shaft; 2. Fatigue cracking at the stress concentration area under long-term load; 3. Corrosion caused by mud and humid environment.

1. Lubricate the inner hole of the pad eye monthly to reduce friction; 2. Inspect the stress concentration area quarterly for cracks; 3. Clean and apply anti-rust grease regularly to prevent corrosion.

Can non-genuine components be used to replace the damaged parts of the ZJ40 rig mud board system?

No, non-genuine components are not recommended. All listed components are precision-manufactured to match the ZJ40 rig’s dimensions and performance, complying with API Spec 7K and GB/T 20946-2007. Non-genuine parts often have inferior materials and incorrect dimensions—for example, non-genuine safety pins may have insufficient tensile strength, leading to breakage and mud board falling; non-genuine mud boards have poor wear resistance, which will be deformed and damaged quickly. Always use genuine parts with a certificate of conformity to ensure safety and compatibility.

How to effectively extend the service life of mud board and its matching components in high-mud-content drilling environments?

Three key measures: 1. Daily cleaning: Clean mud residues on all components after operation to reduce erosion; 2. Regular maintenance: Apply anti-rust grease to metal components (safety pins, chains, pin shafts) monthly, and touch up anti-wear/anti-corrosion coating for mud boards and connection plates quarterly; 3. Regular inspection: Check for rust, deformation and wear weekly, replace damaged parts in time, and tighten loose connecting bolts. In addition, avoid direct impact of large solid particles on components to reduce accidental damage.