BOMCO-ZJ50DB7 Drilling Rig Parts Supply

1

Mast (JJ315/45-K7)

JJ545408-00, JG05-004, JJ545408-27.00

High-strength Q345B alloy steel (main structure), anti-corrosion coated steel (surface)

1. Wind-induced vibration causing welding joint fatigue; 2. Outdoor exposure leading to rust and material degradation; 3. Overload beyond 3150kN rated load.

1. Inspect welding joints monthly for cracks via NDT; 2. Touch up anti-corrosion coating quarterly; 3. Equip load monitoring system to avoid overload.

1

Substructure (DZ315/9-X3)

JG05-001, DZ590404-00

Q355B high-strength steel (load-bearing beams), reinforced concrete (foundation connection), anti-mud corrosion coating

1. Uneven ground settlement causing local stress concentration; 2. Drilling mud erosion damaging surface coating; 3. Rig vibration leading to bolt loosening and structural wear.

1. Level the foundation before installation and inspect quarterly; 2. Clean mud residues weekly and reapply coating if damaged; 3. Tighten connecting bolts before daily operation.

1

Drawworks (JC-50DB4, H05-25)

AF500305-00

Alloy steel (gears), chromium-molybdenum steel (transmission components), cast steel (housing)

1. High-torque operation causing gear tooth wear; 2. Lubricant degradation leading to internal component friction; 3. Drill string impact during hoisting/lowering.

1. Use API-certified gear oil and replace every 150 operating hours; 2. Install impact buffers to reduce drill string shock; 3. Inspect gear teeth for wear weekly.

2

Shaft of Drum

AF500305-0401, QA501

40CrNiMoA alloy steel (high-tensile, fatigue-resistant)

1. Torsional fatigue from long-term heavy-load rotation; 2. Surface wear from cable friction; 3. Improper alignment causing eccentric wear.

1. Conduct NDT for fatigue cracks every 6 months; 2. Lubricate cable-drum contact area daily; 3. Calibrate drum alignment monthly.

3

Drawworks Frame

AF500305-0100, H05-25

Q355B steel (welded frame), anti-corrosion and anti-vibration coating

1. Rig vibration causing frame welding joint fatigue; 2. Outdoor exposure leading to rust; 3. Uneven load distribution damaging frame structure.

1. Inspect welding joints monthly for cracks; 2. Clean and repaint frame quarterly; 3. Ensure uniform load distribution during operation.

1

Crown Block (TC3-315, 05-004)

AA315102-00

Alloy steel (sheaves), high-strength steel (frame), stainless steel (bearings)

1. Rope friction causing sheave groove wear; 2. Bearing overheating from poor lubrication; 3. Wind vibration leading to frame deformation.

1. Inspect sheave grooves for wear weekly and rework if needed; 2. Lubricate bearings with high-temperature grease every 80 operating hours; 3. Secure crown block with anti-vibration fasteners.

2

Crown Block Frame

AA18006-O2-00A, JE05-04

Q345B high-strength alloy steel, anti-corrosion coating

1. High-altitude wind load causing structural fatigue; 2. Corrosion from rain and dew; 3. Impact from falling debris during drilling.

1. Inspect frame structure monthly for deformation; 2. Touch up anti-corrosion coating annually; 3. Install debris shields to protect the frame.

3

Main Shaft (Crown Block)

AA18004-03.06

42CrMo alloy steel (heat-treated for high hardness and toughness)

1. Torsional and bending stress causing fatigue cracks; 2. Bearing friction leading to shaft surface wear; 3. Misalignment causing uneven load distribution.

1. Conduct NDT every 6 months to detect fatigue cracks; 2. Replace worn bearings promptly to reduce friction; 3. Calibrate shaft alignment during maintenance.

1

Travelling Block (YC-315)

AB31500100, AB3150010500

Alloy steel (sheaves), chrome-plated steel (main shaft), cast steel (housing)

1. Rope friction causing sheave groove wear; 2. Impact load during drill string lowering; 3. Hydraulic system leakage leading to internal corrosion.

1. Replace ropes if they show excessive wear to protect sheaves; 2. Reduce lowering speed to minimize impact; 3. Inspect hydraulic seals weekly for leakage.

2

Main Shaft (Travelling Block)

AB60000-13

35CrMo alloy steel (heat-treated for fatigue resistance)

1. High-load rotation causing torsional fatigue; 2. Bearing misalignment leading to eccentric wear; 3. Contamination from drilling fluid causing corrosion.

1. Lubricate bearings with anti-corrosion grease; 2. Calibrate shaft and bearing alignment monthly; 3. Install seals to prevent drilling fluid intrusion.

3

Sheaves (Ф1270mm)

T201-0302

High-carbon alloy steel (sheave body), wear-resistant alloy coating (groove surface)

1. Rope-sheave friction causing groove wear; 2. Foreign particles (sand, metal chips) increasing friction; 3. Overload causing sheave deformation.

1. Inspect groove surface weekly for wear; 2. Clean sheaves daily to remove debris; 3. Strictly follow rated load limits to avoid deformation.

1

Rotary Table (ZP375)

AG37500100

Alloy steel (gears), chromium steel (bearings), cast iron (housing)

1. Gear meshing without sufficient lubrication causing tooth wear; 2. Drilling fluid intrusion leading to internal corrosion; 3. High torque causing bearing damage.

1. Use industrial gear oil meeting ISO 68 standards and replace every 200 operating hours; 2. Replace damaged seals to prevent fluid intrusion; 3. Monitor torque and stop operation if exceeding limits.

2

Base (Rotary Table)

AG3750010200

Q355B steel (welded base), anti-vibration and anti-corrosion coating

1. Rig vibration causing base deformation; 2. Mud corrosion damaging surface coating; 3. Uneven load leading to local stress concentration.

1. Level the base during installation and inspect quarterly; 2. Clean mud residues weekly; 3. Reinforce base connections to reduce vibration impact.

3

Big Gear (Rotary Table)

AG3750010902

20CrMnTi alloy steel (carburized for high hardness and wear resistance)

1. Gear meshing misalignment causing uneven tooth wear; 2. Foreign particles between teeth increasing friction; 3. Fatigue from long-term high-torque operation.

1. Calibrate gear alignment monthly; 2. Clean gear teeth daily to remove debris; 3. Inspect teeth for fatigue cracks weekly.

4

Pinion Gear (Rotary Table)

AG375001101

20CrNiMo alloy steel (heat-treated for toughness and wear resistance)

1. High-speed meshing with big gear causing tooth wear; 2. Lubricant shortage leading to dry friction; 3. Shaft misalignment causing end face wear.

1. Ensure sufficient lubrication during operation; 2. Replace lubricant regularly and clean oil passages; 3. Align pinion shaft with big gear shaft monthly.

5

Main Shaft (Rotary Table)

AG3750011103

40Cr alloy steel (heat-treated for high strength and fatigue resistance)

1. Torsional stress from high-torque rotation; 2. Bearing friction causing shaft surface wear; 3. Drilling fluid corrosion leading to material degradation.

1. Conduct NDT every 6 months to detect fatigue cracks; 2. Replace worn bearings promptly; 3. Install anti-corrosion seals to protect the shaft.

Are these parts fully compatible with BOMCO-ZJ50DB7 drilling rig?

Yes, all parts are customized to match BOMCO-ZJ50DB7 rig specifications, including the listed mast, substructure, drawworks, crown block, travelling block and rotary table. They adhere to API standards, ensuring 100% compatibility without installation modifications.

How to extend the service life of key transmission parts (gears, shafts)?

Follow three core steps: 1. Use API-certified lubricants and replace them per the recommended cycle; 2. Conduct weekly inspections for wear, misalignment or corrosion; 3. Avoid overload and stabilize operation speed to reduce fatigue damage.

Do you provide technical support for part installation and maintenance?

Yes, we offer professional technical guidance for part installation, maintenance and fault diagnosis, including compliance with API 7K/8C operation standards. Our team can help optimize maintenance schedules to extend part service life and reduce operational risks.