Catalog of Core Drilling Equipment Components

1

JC14

Main frame: Q345B alloy steel; Gearbox: 20CrMnTi alloy steel with carburizing heat treatment; Brake disc: 42CrMo alloy steel

1. Gear tooth wear due to improper lubrication and long-term high-load transmission; 2. Brake disc thermal fatigue cracking caused by frequent emergency braking.

1. Use API-specified extreme-pressure lubricating oil for the gearbox, and replace it every 1200 operating hours; 2. Avoid frequent emergency braking; check brake disc temperature regularly, ensuring it does not exceed 250°C; 3. Inspect gear tooth wear monthly using a tooth thickness gauge.

2

JC14/11

Main frame: Q345B alloy steel; Gearbox: 20CrMnTi alloy steel; Brake system: High-strength cast iron with wear-resistant coating

1. Wear of brake pads due to prolonged friction; 2. Bearing damage caused by dust and debris ingress into the transmission system.

1. Replace brake pads when wear thickness exceeds 3mm; 2. Install high-efficiency dust seals for the transmission system; clean the air filter weekly; 3. Conduct quarterly bearing vibration testing to detect early damage.

3

JC18A, JC18B, JC18/11

Main frame: Q345B alloy steel; Winch drum: 45# steel with quenching and tempering treatment; Shaft: 40Cr alloy steel

1. Drum surface wear and grooving caused by long-term contact with drill ropes; 2. Shaft fatigue deformation due to uneven load distribution.

1. Regularly check the drum surface for grooving; grind and repair when groove depth exceeds 2mm; 2. Ensure uniform rope winding on the drum; avoid eccentric loading; 3. Conduct annual non-destructive testing (NDT) on the main shaft to detect fatigue cracks.

4

JC21/11, JC21E, JC21D, JC21F, JC21G, JC21F/11, JC21/11E

Main frame: Q345B alloy steel; Gearbox: 20CrNiMo alloy steel; Hydraulic system components: High-strength aluminum alloy with anti-corrosion coating

1. Hydraulic component wear caused by contaminated hydraulic oil; 2. Gear pitting corrosion due to inadequate lubrication under low-temperature conditions.

1. Use high-purity hydraulic oil that meets API standards; install a high-precision oil filter and replace it every 800 operating hours; 2. Preheat the gearbox lubricating oil to above 10°C before starting in low-temperature environments (-10°C and below); 3. Inspect hydraulic system pressure monthly to ensure it is within the specified range.

5

JC28/11D, JC28/11DII, JC28/11E, JC28/11F, JC28/11FII, JC28/11, JC28L, JC28LII, JC28K, JC28KIII

Main frame: Q690 high-strength alloy steel; Gearbox: 20CrNi2Mo alloy steel; Brake system: Carbon-carbon composite materials

1. Carbon-carbon brake pad oxidation and wear in high-temperature environments; 2. Gearbox oil leakage caused by seal aging under long-term thermal cycling.

1. Store spare brake pads in a dry, sealed environment to avoid oxidation; replace them according to the wear indicator; 2. Inspect the gearbox seals quarterly; replace aging or cracked seals promptly; 3. Maintain stable cooling system operation to control gearbox temperature below 180°C.

6

JC20, JC30, JC40, JC50, JC70

Main frame: Q345B/Q690 alloy steel (based on model); Gearbox: 20CrMnTi/20CrNiMo alloy steel; Winch drum: 45# steel with hard chrome plating

1. Drum chrome plating peeling due to impact from heavy loads; 2. Gear tooth breakage caused by overloading beyond rated capacity.

1. Strictly adhere to the rated load; avoid overloading operations; 2. Inspect the drum chrome plating for peeling; re-plate when peeling area exceeds 5%; 3. Conduct monthly load testing to ensure the safety protection device is functional.

7

JC30DB, JC40DB, JC40DJ, JC40DZ, JC50DB, JC50D, JC70DB, JC70D, JC90DB

Main frame: Q690/Q960 high-strength alloy steel; Gearbox: 20CrNi2MoV alloy steel; Electrical components: Explosion-proof stainless steel 316L

1. Electrical component corrosion in offshore or high-humidity environments; 2. Gearbox bearing wear caused by misalignment during installation.

1. Regularly clean and dry electrical components; apply anti-corrosion grease to connection points; 2. Ensure precise alignment during installation using laser alignment tools; 3. For offshore applications, conduct weekly anti-corrosion inspections and touch-up painting as needed.

1

TC60, TC70

Frame: Q345B alloy steel; Pulley: 42CrMo alloy steel with quenching treatment; Bearing: High-temperature resistant rolling bearing steel

1. Pulley groove wear caused by long-term friction with steel wire ropes; 2. Bearing corrosion due to rainwater and dust ingress.

1. Lubricate bearings with lithium-based grease every 500 operating hours; install effective rain shields and dust covers; 2. Check pulley groove wear weekly; the wear depth should not exceed 1mm; 3. Inspect the frame for deformation annually using a level gauge.

2

TC90C, TC135, TC158, TC160

Frame: Q690 high-strength alloy steel; Pulley: 40CrNiMoA alloy steel; Shaft: 42CrMo alloy steel with tempering treatment

1. Shaft bending deformation due to uneven hoisting loads; 2. Pulley surface fatigue cracking caused by repeated impact.

1. Ensure balanced hoisting loads; avoid sudden load changes; 2. Conduct quarterly non-destructive testing (NDT) on pulleys and shafts to detect fatigue cracks; 3. Check the pulley runout with a dial gauge; the runout tolerance should not exceed 0.5mm.

3

TC170C, TC180, TC180D, TC225

Frame: Q690 alloy steel with shot peening; Pulley: 20CrNi2Mo alloy steel with carburizing heat treatment; Seal: Fluororubber Viton

1. Seal aging and failure in high-temperature environments, leading to bearing contamination; 2. Frame weld cracking due to cyclic loads.

1. Replace seals every 12 months or when oil leakage is detected; 2. Inspect frame welds monthly for cracks; repair promptly using submerged arc welding if cracks are found; 3. Monitor the operating temperature of bearings; avoid overheating above 120°C.

4

TC315, TC450

Frame: Q960 ultra-high strength alloy steel; Pulley: 34CrNiMo6 alloy steel; Bearing: Self-lubricating composite bearing

1. Self-lubricating bearing material wear in heavy-load, low-speed operations; 2. Frame corrosion in offshore saltwater environments.

1. Check the self-lubricating bearing wear every 800 operating hours; replace when the wear gap exceeds 0.8mm; 2. Apply anti-corrosion coating (epoxy zinc-rich paint) to the frame annually; 3. For offshore use, rinse the crown block with fresh water regularly to remove salt deposits.

1

YG35, YG60, YG70, YG80

Hook: 20CrNiMo alloy steel with quenching and tempering treatment; Pulley: 42CrMo alloy steel; Shell: Q345B alloy steel

1. Hook throat wear caused by long-term contact with lifting accessories; 2. Pulley bearing damage due to insufficient lubrication.

1. Inspect the hook throat wear weekly; the wear depth should not exceed 10% of the original dimension; 2. Lubricate pulley bearings with high-pressure grease every 400 operating hours; 3. Check the hook safety latch regularly to ensure it closes tightly and functions properly.

2

YG110, YG135B, Y160, Y160B, YG180, YG225

Hook: 40CrNiMoA alloy steel; Pulley: 20CrMnTi alloy steel with carburizing treatment; Shaft: 42CrMo alloy steel

1. Shaft fatigue cracking due to repeated dynamic loads; 2. Pulley groove deformation caused by overloading.

1. Strictly comply with the rated load; avoid impact loading; 2. Conduct semi-annual non-destructive testing (NDT) on shafts and hooks to detect fatigue cracks; 3. Check pulley groove shape with a template; replace pulleys if deformation exceeds 0.5mm.

3

DG225, DG315, DG450, DG675

Hook: 34CrNiMo6 alloy steel; Pulley: Wear-resistant alloy steel with hardfacing; Shell: Q690 high-strength alloy steel

1. Hardfacing layer peeling on pulley surfaces due to impact; 2. Shell corrosion in high-humidity or corrosive environments.

1. Avoid sudden impact when lifting loads; minimize contact between the pulley and irregularly shaped objects; 2. Inspect the hardfacing layer for peeling; reapply hardfacing when peeling area exceeds 10%; 3. Apply anti-corrosion grease to the shell and hook regularly; store in a dry environment when not in use.

1

YC225

Frame: Q345B alloy steel; Pulley: 42CrMo alloy steel with quenching treatment; Bearing: Deep groove ball bearing made of GCr15 steel

1. Bearing wear caused by dust and debris ingress; 2. Pulley groove wear due to long-term friction with steel wire ropes.

1. Install high-quality dust seals for bearings; clean the pulley system weekly; 2. Lubricate bearings with lithium-based grease every 500 operating hours; 3. Check pulley groove wear monthly; replace pulleys when wear depth exceeds 1mm.

2

YC315, YC450

Frame: Q690 high-strength alloy steel; Pulley: 20CrNiMo alloy steel; Shaft: 42CrMo alloy steel with tempering treatment

1. Shaft bending deformation due to uneven load distribution; 2. Frame weld cracking caused by cyclic loads.

1. Ensure balanced load distribution during hoisting; avoid eccentric loading; 2. Inspect frame welds quarterly for cracks; repair using qualified welding materials if cracks are found; 3. Conduct annual NDT on shafts to detect fatigue damage.

3

YC585, YC675

Frame: Q960 ultra-high strength alloy steel; Pulley: Wear-resistant composite material; Bearing: Self-lubricating spherical plain bearing

1. Self-lubricating material depletion in long-term operation; 2. Frame corrosion in offshore or harsh environments.

1. Check the self-lubricating material level every 600 operating hours; replenish or replace as needed; 2. Apply anti-corrosion coating to the frame annually; 3. For offshore use, conduct weekly inspections for salt deposits and rinse with fresh water.

1

SL225, SL160, SL135, SL1-2-00

Body: 45# steel with quenching and tempering treatment; Rotor: 20CrMnTi alloy steel; Seal: Fluororubber Viton; Bearing: GCr15 bearing steel

1. Seal failure and drilling fluid leakage caused by high-pressure impact; 2. Bearing wear due to contaminated lubricating oil.

1. Monitor the swivel working pressure regularly; avoid exceeding the rated pressure; 2. Use clean, high-pressure resistant lubricating oil; replace the oil filter every 300 operating hours; 3. Inspect seals for leakage daily; replace damaged seals promptly.

2

SL70, SL110

Body: Q345B alloy steel; Rotor: 42CrMo alloy steel; Seal: Nitrile rubber; Bearing: Deep groove ball bearing

1. Rotor surface corrosion caused by drilling fluid ingress; 2. Bearing damage due to insufficient lubrication in low-temperature environments.

1. Ensure effective sealing of the swivel; clean the rotor surface after each use; 2. Preheat the lubricating oil to above 5°C before starting in low-temperature conditions; 3. Conduct monthly bearing temperature testing to detect overheating.

3

XSL450, XSL225

Body: 34CrNiMo6 alloy steel; Rotor: 20CrNi2Mo alloy steel; Seal: Polytetrafluoroethylene (PTFE) composite; Bearing: Tapered roller bearing

1. PTFE seal wear due to long-term high-speed rotation; 2. Body cracking caused by thermal shock in high-temperature drilling.

1. Check the seal wear every 800 operating hours; replace seals when leakage occurs; 2. Avoid sudden temperature changes in the swivel body; preheat gradually before high-temperature operation; 3. Conduct semi-annual NDT on the swivel body to detect cracks.

4

DSL60, DSL90, DSL135, DSL160

Body: Stainless steel 316L; Rotor: 40CrNiMoA alloy steel; Seal: Fluororubber; Bearing: Self-lubricating bearing

1. Self-lubricating bearing wear in high-humidity, corrosive environments; 2. Body corrosion caused by acidic drilling fluid.

1. Inspect the self-lubricating bearing every 500 operating hours; replace when wear exceeds the limit; 2. Use corrosion inhibitors in acidic drilling fluid; 3. Clean the swivel body with neutral detergent regularly; apply anti-corrosion grease to external surfaces.

1

ZP50, ZP135, ZP275, ZP205, ZP175

Housing: Q345B alloy steel; Gear: 20CrMnTi alloy steel with carburizing treatment; Tabletop: 45# steel with quenching treatment

1. Gear tooth wear and pitting due to improper lubrication; 2. Tabletop wear caused by long-term contact with drill collars.

1. Use gear oil that meets API GL-5 standard; replace it every 1500 operating hours; 2. Install wear plates on the tabletop; replace wear plates when wear exceeds 2mm; 3. Check gear backlash monthly; adjust if it exceeds the specified range.

2

ZP375, ZP375Z, ZP495, ZP205C

Housing: Q690 high-strength alloy steel; Gear: 20CrNiMo alloy steel; Tabletop: 42CrMo alloy steel with nitriding treatment

1. Gear tooth breakage caused by overloading beyond rated torque; 2. Housing deformation due to uneven foundation.

1. Strictly adhere to the rated torque; avoid sudden torque increases; 2. Ensure the foundation is level and stable; inspect the foundation for settlement quarterly; 3. Conduct annual NDT on gears and housing to detect fatigue damage.

3

P700, P560

Housing: Q960 ultra-high strength alloy steel; Gear: 34CrNiMo6 alloy steel; Tabletop: Wear-resistant cast iron with alloying elements

1. Tabletop cracking due to impact from heavy drill collars; 2. Gearbox oil leakage caused by seal aging under high-temperature operation.

1. Use buffer pads when placing drill collars on the tabletop; avoid direct impact; 2. Inspect the gearbox seals quarterly; replace aging seals promptly; 3. Maintain effective operation of the cooling system to control gearbox temperature below 160°C.