Column & Matching Parts for ZJ40 Drilling Rig

1

Z05010300013AA

Column for ZJ40 (Column I)

High-strength alloy steel (Q355B); seamless steel pipe structure; wall thickness ≥12mm; surface shot blasting + epoxy anti-rust coating; precision welded joints with reinforced plates; designed to bear vertical loads up to 1200kN, complying with API Spec 4F.

1. Bending deformation from uneven load distribution during rig installation; 2. Weld seam fatigue cracking caused by long-term drilling vibration; 3. Corrosion from outdoor exposure (rain, dust, drilling fluids) and moisture accumulation.

1. Ensure level installation to distribute load evenly; use a level meter to calibrate column verticality before fixing; 2. Inspect weld seams monthly with ultrasonic flaw detection to identify hidden cracks; 3. Clean the surface regularly and touch up anti-rust coating if peeling occurs.

2

Z05010300013AA

Column I

High-strength alloy steel (Q355B); seamless steel pipe structure; wall thickness ≥12mm; surface shot blasting + epoxy anti-rust coating; precision welded joints with reinforced plates; designed to bear vertical loads up to 1200kN, complying with API Spec 4F.

1. Bending deformation from uneven load distribution during rig installation; 2. Weld seam fatigue cracking caused by long-term drilling vibration; 3. Corrosion from outdoor exposure (rain, dust, drilling fluids) and moisture accumulation.

1. Ensure level installation to distribute load evenly; use a level meter to calibrate column verticality before fixing; 2. Inspect weld seams monthly with ultrasonic flaw detection to identify hidden cracks; 3. Clean the surface regularly and touch up anti-rust coating if peeling occurs.

3

Z05010300014AA

Column for ZJ40 (Column II)

High-strength alloy steel (Q355B); seamless steel pipe structure; wall thickness ≥12mm; surface shot blasting + epoxy anti-rust coating; precision welded joints with reinforced plates; designed to bear vertical loads up to 1200kN, complying with API Spec 4F; fully compatible with Column I for symmetric load-bearing.

1. Compression deformation from excessive load during tripping operations; 2. Weld seam cracking at the base connection due to rig vibration; 3. Corrosion from drilling fluid splashes and ground moisture.

1. Avoid overloading the column beyond its rated capacity (1200kN); monitor load during tripping; 2. Reinforce base weld seams with additional welding if needed; check monthly for cracks; 3. Install a protective cover to prevent drilling fluid splashes on the column surface.

4

Z05010300014AA

Column II

High-strength alloy steel (Q355B); seamless steel pipe structure; wall thickness ≥12mm; surface shot blasting + epoxy anti-rust coating; precision welded joints with reinforced plates; designed to bear vertical loads up to 1200kN, complying with API Spec 4F; fully compatible with Column I for symmetric load-bearing.

1. Compression deformation from excessive load during tripping operations; 2. Weld seam cracking at the base connection due to rig vibration; 3. Corrosion from drilling fluid splashes and ground moisture.

1. Avoid overloading the column beyond its rated capacity (1200kN); monitor load during tripping; 2. Reinforce base weld seams with additional welding if needed; check monthly for cracks; 3. Install a protective cover to prevent drilling fluid splashes on the column surface.

5

P9950072AA

Column L=4128

High-strength structural steel (Q235B); length 4128mm; seamless steel pipe; wall thickness ≥10mm; surface zinc-plated for anti-rust protection; designed as an auxiliary column to support main columns, enhancing overall structural rigidity, complying with GB/T 30029-2013.

1. Bending deformation from impact during rig transportation or maintenance; 2. Corrosion at the end connections due to moisture accumulation; 3. Wear at the base from contact with the rig frame during vibration.

1. Secure the column with straps during transportation to avoid impact; use padding to protect the ends; 2. Apply anti-rust grease to end connections before installation; 3. Inspect the base quarterly for wear; replace the base pad if wear exceeds 1mm.

6

P9950072AA

Column L=4128

High-strength structural steel (Q235B); length 4128mm; seamless steel pipe; wall thickness ≥10mm; surface zinc-plated for anti-rust protection; designed as an auxiliary column to support main columns, enhancing overall structural rigidity, complying with GB/T 30029-2013.

1. Bending deformation from impact during rig transportation or maintenance; 2. Corrosion at the end connections due to moisture accumulation; 3. Wear at the base from contact with the rig frame during vibration.

1. Secure the column with straps during transportation to avoid impact; use padding to protect the ends; 2. Apply anti-rust grease to end connections before installation; 3. Inspect the base quarterly for wear; replace the base pad if wear exceeds 1mm.

1

P9850036AA

Cross beam

High-strength structural steel (Q355B); I-beam cross-section for enhanced load-bearing; length matched to column spacing; surface anti-rust coating; welded to columns to distribute vertical load evenly, complying with API Spec 4F.

1. Torsional deformation from uneven lateral load during drilling; 2. Weld seam cracking at column connections due to vibration; 3. Corrosion from outdoor exposure and drilling fluid splashes.

1. Ensure proper alignment during installation to avoid torsional stress; use a level meter to calibrate beam horizontality; 2. Inspect weld seams monthly for cracks; repair immediately with professional welding; 3. Clean the beam surface regularly to remove drilling fluids.

2

P9850036AA

Cross beam

High-strength structural steel (Q355B); I-beam cross-section for enhanced load-bearing; length matched to column spacing; surface anti-rust coating; welded to columns to distribute vertical load evenly, complying with API Spec 4F.

1. Torsional deformation from uneven lateral load during drilling; 2. Weld seam cracking at column connections due to vibration; 3. Corrosion from outdoor exposure and drilling fluid splashes.

1. Ensure proper alignment during installation to avoid torsional stress; use a level meter to calibrate beam horizontality; 2. Inspect weld seams monthly for cracks; repair immediately with professional welding; 3. Clean the beam surface regularly to remove drilling fluids.

3

P9850034AA

Cross beam

High-strength structural steel (Q355B); channel steel cross-section; surface anti-rust coating; designed for secondary load distribution between columns; lightweight yet rigid, complying with GB/T 30029-2013.

1. Bending deformation from excessive local load (e.g., tool placement); 2. Wear at connection points due to long-term vibration; 3. Corrosion from moisture accumulation in the channel.

1. Do not place heavy tools (over 50kg) on the beam; use dedicated tool racks instead; 2. Inspect connection points quarterly for wear; replace worn bolts/washers promptly; 3. Clean the channel regularly to remove moisture and debris.

4

P9850035AA

Brace

Alloy steel (20Mn2); seamless steel pipe; wall thickness ≥8mm; surface anti-rust coating; diagonal design to connect columns and cross beams, resisting lateral vibration and preventing structural displacement, complying with API Spec 4F.

1. Tensile fatigue from long-term lateral vibration; 2. Weld seam cracking at connection points due to uneven stress; 3. Corrosion from outdoor exposure and moisture.

1. Inspect the brace quarterly for signs of fatigue (e.g., slight bending); replace if deformation exceeds 1mm; 2. Ensure connection points are properly welded to distribute stress evenly; 3. Apply anti-rust grease to the surface to prevent corrosion.

1

P6201849AA

Reinforced plate

High-strength structural steel (Q355B); thickness ≥12mm; surface anti-rust coating; large-area flat design to reinforce column-weld joints, distributing stress and preventing weld cracking, complying with API Spec 4F.

1. Wear at the joint surface due to vibration-induced friction; 2. Corrosion from drilling fluids and outdoor exposure; 3. Weld seam cracking around the plate edges due to stress concentration.

1. Apply anti-wear grease to the joint surface before installation to reduce friction; 2. Clean the plate surface regularly to remove drilling fluids; 3. Inspect edge weld seams monthly for cracks; repair immediately if found.

2

P6201849AA

Reinforced plate

High-strength structural steel (Q355B); thickness ≥12mm; surface anti-rust coating; large-area flat design to reinforce column-weld joints, distributing stress and preventing weld cracking, complying with API Spec 4F.

1. Wear at the joint surface due to vibration-induced friction; 2. Corrosion from drilling fluids and outdoor exposure; 3. Weld seam cracking around the plate edges due to stress concentration.

1. Apply anti-wear grease to the joint surface before installation to reduce friction; 2. Clean the plate surface regularly to remove drilling fluids; 3. Inspect edge weld seams monthly for cracks; repair immediately if found.

3

P6201850AA

Reinforced plate

High-strength structural steel (Q355B); thickness ≥12mm; surface anti-rust coating; tailored design to reinforce column-base connections, bearing vertical load and preventing base deformation, complying with GB/T 30029-2013.

1. Compression deformation from excessive base load; 2. Corrosion from ground moisture and mud accumulation; 3. Wear at the base surface from contact with the rig foundation.

1. Ensure the rig foundation is level to distribute load evenly on the plate; 2. Clean mud from the plate surface regularly to prevent corrosion; 3. Install a rubber pad between the plate and foundation to reduce wear.

4

P6201848AA

Vertical plate

Structural steel (Q235B); thickness ≥8mm; surface anti-rust coating; vertical flat design to connect columns and cross beams, enhancing vertical rigidity and preventing lateral displacement, complying with API Spec 4F.

1. Bending deformation from lateral impact during maintenance; 2. Weld seam cracking at connections due to vibration; 3. Corrosion from moisture accumulation behind the plate.

1. Avoid hitting the plate with tools during maintenance; use protective covers if needed; 2. Inspect weld seams quarterly for cracks; repair immediately if found; 3. Check behind the plate monthly for moisture; clean and dry as needed.

5

P6201848AA

Vertical plate

Structural steel (Q235B); thickness ≥8mm; surface anti-rust coating; vertical flat design to connect columns and cross beams, enhancing vertical rigidity and preventing lateral displacement, complying with API Spec 4F.

1. Bending deformation from lateral impact during maintenance; 2. Weld seam cracking at connections due to vibration; 3. Corrosion from moisture accumulation behind the plate.

1. Avoid hitting the plate with tools during maintenance; use protective covers if needed; 2. Inspect weld seams quarterly for cracks; repair immediately if found; 3. Check behind the plate monthly for moisture; clean and dry as needed.

6

P6201854AA

Stiffener

Structural steel (Q235B); thickness ≥6mm; narrow, rigid design; surface anti-rust coating; installed along column edges to prevent local bending and deformation under stress, complying with GB/T 30029-2013.

1. Bending deformation from lateral impact; 2. Weld seam cracking due to stress concentration; 3. Corrosion from outdoor exposure and moisture.

1. Protect the stiffener with padding during rig transportation to avoid impact; 2. Inspect weld seams monthly for cracks; repair immediately if found; 3. Touch up anti-rust coating on peeling areas promptly.

1

P6101438AA

Closing plate 240X228

Structural steel (Q235B); size 240mm×228mm; thickness ≥5mm; surface anti-rust coating; rectangular design to close column end openings, preventing debris and moisture from entering, complying with API Spec 4F.

1. Loosening and loss due to rig vibration; 2. Corrosion from outdoor exposure and moisture; 3. Edge damage from improper installation/removal.

1. Secure the plate with high-strength bolts; check tightness monthly and re-tighten if loose; 2. Apply anti-rust grease to the edges before installation; 3. Use a rubber mallet to install/remove the plate to avoid edge damage.

2

P6101438AA

Closing plate 240X228

Structural steel (Q235B); size 240mm×228mm; thickness ≥5mm; surface anti-rust coating; rectangular design to close column end openings, preventing debris and moisture from entering, complying with API Spec 4F.

1. Loosening and loss due to rig vibration; 2. Corrosion from outdoor exposure and moisture; 3. Edge damage from improper installation/removal.

1. Secure the plate with high-strength bolts; check tightness monthly and re-tighten if loose; 2. Apply anti-rust grease to the edges before installation; 3. Use a rubber mallet to install/remove the plate to avoid edge damage.

3

P6101436AA

Plug plate 250X46

Structural steel (Q235B); size 250mm×46mm; thickness ≥5mm; surface anti-rust coating; narrow rectangular design to plug small openings in columns, preventing debris accumulation, complying with GB/T 30029-2013.

1. Corrosion from moisture entering the opening; 2. Loosening due to vibration; 3. Wear at the contact surface with the column.

1. Clean the opening thoroughly before installing the plate; 2. Apply a thin layer of sealant around the plate to prevent moisture entry; 3. Check monthly for tightness and corrosion.

4

P6101436AA

Plug plate 250X46

Structural steel (Q235B); size 250mm×46mm; thickness ≥5mm; surface anti-rust coating; narrow rectangular design to plug small openings in columns, preventing debris accumulation, complying with GB/T 30029-2013.

1. Corrosion from moisture entering the opening; 2. Loosening due to vibration; 3. Wear at the contact surface with the column.

1. Clean the opening thoroughly before installing the plate; 2. Apply a thin layer of sealant around the plate to prevent moisture entry; 3. Check monthly for tightness and corrosion.

5

P6101437AA

Plug plate 250X98

Structural steel (Q235B); size 250mm×98mm; thickness ≥5mm; surface anti-rust coating; rectangular design to plug medium-sized openings in columns, preventing drilling fluids from entering, complying with API Spec 4F.

1. Corrosion from drilling fluid splashes; 2. Loosening due to rig vibration; 3. Bending deformation from accidental impact.

1. Install a protective shield around the plate to prevent drilling fluid splashes; 2. Check tightness monthly and re-tighten if loose; 3. Avoid placing tools on the plate to prevent bending.

6

P6101437AA

Plug plate 250X98

Structural steel (Q235B); size 250mm×98mm; thickness ≥5mm; surface anti-rust coating; rectangular design to plug medium-sized openings in columns, preventing drilling fluids from entering, complying with API Spec 4F.

1. Corrosion from drilling fluid splashes; 2. Loosening due to rig vibration; 3. Bending deformation from accidental impact.

1. Install a protective shield around the plate to prevent drilling fluid splashes; 2. Check tightness monthly and re-tighten if loose; 3. Avoid placing tools on the plate to prevent bending.

1

P6003876AA

Shim plate

Structural steel (Q235B); thickness 2-5mm (adjustable); surface anti-rust coating; thin, flat design to adjust column verticality and levelness during installation, ensuring even load distribution, complying with GB/T 30029-2013.

1. Wear from friction between the column and foundation during vibration; 2. Corrosion from ground moisture; 3. Bending deformation from excessive load.

1. Use multiple thin shim plates instead of one thick plate to distribute load evenly; 2. Apply anti-rust grease to the plate surface before installation; 3. Inspect quarterly for wear; replace if wear exceeds 0.5mm.

2

P6003875AA

Pad eye

Alloy steel (35CrMoA); heat-treated for toughness; surface anti-rust coating; hook design to provide a lifting point for columns and cross beams, capable of bearing lifting loads up to 500kN, complying with API Spec 4F.

1. Wear at the hook surface from repeated lifting; 2. Fatigue cracking from long-term load-bearing; 3. Corrosion from outdoor exposure and moisture.

1. Inspect the hook surface quarterly for wear; replace if wear exceeds 1mm; 2. Check for cracks monthly with ultrasonic testing; 3. Apply anti-rust grease to the hook regularly to prevent corrosion.

1

Are Column I (Z05010300013AA) and Column II (Z05010300014AA) interchangeable? Can I replace one with the other if damaged?

While Column I and Column II have the same load-bearing capacity and material, they are not fully interchangeable. They are designed for symmetric installation on the ZJ40 rig, with slight differences in connection hole positions to match the rig’s structural layout. Replacing one with the other will cause connection mismatch, uneven load distribution, and potential structural instability. Always use the corresponding column model (I or II) for replacement.

2

How often should I inspect the column system to prevent major faults, and what inspection methods are recommended?

We recommend a maintenance schedule aligned with API Spec 4F: weekly visual inspections (check for loose parts, corrosion, and obvious damage); monthly detailed inspections (weld seams, column verticality, and connection tightness); quarterly ultrasonic flaw detection for weld seams and columns to identify hidden cracks. For rigs in high-corrosion environments (e.g., coastal areas), shorten the inspection cycle by 30%. Use a level meter to check verticality and an ultrasonic detector for weld testing.

3

What is the difference between the reinforced plates P6201849AA and P6201850AA? Can they be used interchangeably?

These two reinforced plates have different designs and uses and cannot be interchanged. P6201849AA is designed to reinforce column-weld joints, with a large flat surface to distribute stress at welds; P6201850AA is tailored for column-base connections, with a thicker design to bear vertical load at the base. Using the wrong plate will lead to insufficient reinforcement, stress concentration, and potential structural failure—always match the plate model to its intended use.