Spare Parts Catalog for ZJ Series Drilling Rigs

1

ZJ30DBS

Alloy steel (42CrMo) for load-bearing components; 316L stainless steel for fluid systems; ceramic-coated parts for wear resistance

1. Abrasive wear on drill string components from sandstone formations; 2. Fatigue damage on load-bearing parts due to continuous deep drilling vibration

1. Implement regular formation sand control measures and inspect drill string wear every 50 drilling hours; 2. Install vibration dampeners on key load-bearing structures and conduct stress testing monthly

2

ZJ40DBS

Hastelloy alloy for corrosion-prone parts; ductile iron (QT600-3) for gear components; Viton rubber for seals

1. Corrosion of fluid system parts from acidic drilling mud; 2. Gear tooth wear due to improper lubrication under high torque

1. Monitor drilling mud pH weekly and add corrosion inhibitors as needed; 2. Use high-temperature, high-load lubricating grease and replace lubricant every 200 operating hours

3

ZJ50DBS

Titanium alloy for lightweight load-bearing parts; Stellite alloy for cutting components; EPDM rubber for seals

1. Thermal fatigue of drilling motor parts from high-temperature downhole environments; 2. Seal failure due to high-pressure drilling fluid intrusion

1. Install downhole temperature monitoring devices and limit continuous operation when temperature exceeds 150°C; 2. Inspect seal integrity before each drilling cycle and replace worn seals immediately

4

ZJ70DBS

Duplex stainless steel (2205) for offshore corrosion resistance; carbon steel (A105) for structural parts; PTFE composites for gaskets

1. Saltwater corrosion of offshore rig components; 2. Gasket degradation from high-pressure and high-temperature fluid cycling

1. Apply anti-corrosion coating to external components and inspect monthly in offshore environments; 2. Use high-pressure-resistant gaskets and replace them after 30 pressure cycles

5

ZJ90DBS

High-strength alloy steel (Q690) for heavy-load structures; zirconia ceramic for wear parts; fluororubber for seals

1. Structural part deformation due to excessive downhole pressure; 2. Wear of drill bit components from hard rock formations

1. Monitor downhole pressure in real-time and avoid operation beyond rig rated capacity; 2. Select drill bits matching formation hardness and inspect bit wear every 100 drilling meters

6

ZJ120DBS

Inconel 625 alloy for high-temperature corrosion resistance; tungsten carbide for cutting parts; metal matrix composites for structural components

1. High-temperature oxidation of downhole tools in ultra-deep wells; 2. Fatigue failure of hoisting system parts due to heavy load cycling

1. Use high-temperature-resistant protective coatings for downhole tools; 2. Conduct fatigue life assessment of hoisting components every 6 months and replace parts approaching service limits

1

ZJ30D

Carbon steel (Q235) for structural parts; 304 stainless steel for fluid lines; nitrile rubber for seals

1. Dust-induced wear on gearbox components; 2. Seal hardening due to dry onshore humidity

1. Install dust covers on gearboxes and clean internal components every 300 operating hours; 2. Regularly apply seal conditioning agents and store spare seals in a humid environment

2

ZJ40D

Alloy steel (40Cr) for crankshafts; cast iron (HT250) for engine blocks; graphite gaskets for high-temperature sealing

1. Crankshaft wear due to improper alignment; 2. Gasket leakage from engine temperature fluctuations

1. Check crankshaft alignment every 150 operating hours and adjust as needed; 2. Warm up the engine gradually before operation to avoid sudden temperature changes

3

ZJ50D

Stainless steel (316) for corrosion-prone parts; molybdenum disulfide-coated parts for friction reduction; silicone rubber for seals

1. Corrosion from groundwater seepage in onshore drilling; 2. Friction wear on moving parts due to insufficient lubrication

1. Drain groundwater around the rig foundation regularly and inspect parts for corrosion monthly; 2. Implement automatic lubrication systems and monitor lubricant levels in real-time

4

ZJ70D

High-strength alloy steel (Q550) for load-bearing parts; ceramic-coated drill pipes; neoprene rubber for seals

1. Drill pipe wear from abrasive soil formations; 2. Seal damage from frequent rig transportation and installation

1. Rotate drill pipe positions every 200 drilling meters to evenly distribute wear; 2. Use shock-absorbing packaging during transportation and inspect seals after installation

5

ZJ90D

Duplex stainless steel (2507) for harsh environment resistance; titanium alloy for lightweight components; metal gaskets for high-pressure sealing

1. Stress corrosion cracking of structural parts in saline-alkali onshore environments; 2. High-pressure gasket failure due to improper torque during assembly

1. Apply anti-corrosion primers and topcoats to structural parts; 2. Use torque wrenches to follow OEM-specified torque values for gasket assembly

1

ZJ30LDB

PTFE-coated parts for chemical resistance; 316L stainless steel for fluid systems; rubber (NBR) for seals

1. Chemical erosion of fluid system parts from shale gas drilling fluid; 2. Wear of pump components from low-pressure cyclic load

1. Test drilling fluid chemical composition weekly and replace PTFE-coated parts if erosion is detected; 2. Monitor pump operation cycles and conduct wear inspections every 250 cycles

2

ZJ40LDB

Nickel-chromium alloy for corrosion resistance; ductile iron (QT500-7) for gear parts; EPDM rubber for seals

1. Corrosion from coalbed methane drilling fluid containing methane and carbon dioxide; 2. Gear wear due to variable load during drilling

1. Install gas detection devices and use corrosion-resistant materials in gas-prone areas; 2. Maintain stable drilling load and avoid sudden torque changes

3

ZJ50LDB

Corrosion-resistant alloy (Incoloy 825); ceramic composite parts for wear resistance; fluororubber for seals

1. High-temperature corrosion of downhole tools in deep low-pressure wells; 2. Wear of drill bits from soft-hard interbedded formations

1. Use high-temperature corrosion-resistant alloys for downhole tools and inspect every 150 drilling meters; 2. Select drill bits suitable for interbedded formations and adjust drilling speed accordingly

4

ZJ70LDB

High-strength composite materials for structural parts; tungsten carbide for cutting tools; silicone rubber for seals

1. Structural part fatigue due to long-term low-pressure cyclic operation; 2. Cutting tool wear from abrasive shale formations

1. Conduct fatigue testing of structural parts every 6 months; 2. Apply wear-resistant coatings to cutting tools and replace when wear exceeds 3mm

1

ZJ30L

Carbon steel (Q235B) for structural parts; 304 stainless steel for small fluid components; nitrile rubber for seals

1. Dust-induced wear on bearing components; 2. Seal damage from frequent disassembly during maintenance

1. Install bearing dust covers and lubricate bearings every 100 operating hours; 2. Use professional disassembly tools and replace seals after 3 disassembly cycles

2

ZJ40L

Alloy steel (40CrNiMoA) for transmission parts; cast iron (HT200) for engine parts; graphite gaskets for sealing

1. Transmission part wear due to variable speed operation; 2. Gasket leakage from engine vibration

1. Avoid frequent speed changes and inspect transmission parts every 200 operating hours; 2. Install vibration-absorbing gaskets and check for leakage weekly

3

ZJ50L

Stainless steel (316) for corrosion-prone parts; ceramic-coated parts for wear resistance; EPDM rubber for seals

1. Corrosion from groundwater in water well drilling; 2. Wear of drill pipe joints from frequent connection and disconnection

1. Rinse fluid system parts with clean water after drilling and apply anti-corrosion grease; 2. Inspect drill pipe joints for wear every 50 connections and replace worn joints

4

ZJ70L

High-strength alloy steel (Q550) for load-bearing parts; titanium alloy for lightweight components; fluororubber for seals

1. Load-bearing part deformation from uneven ground in onshore exploration; 2. Seal failure from high-temperature engine exhaust

1. Level the rig foundation before operation and inspect load-bearing parts monthly; 2. Install heat shields for seals near the engine exhaust system

1

ZJ30T

Lightweight alloy steel for structural parts; 304 stainless steel for fluid components; rubber (NBR) for seals

1. Structural part loosening and wear from transportation vibration; 2. Seal damage from dust and debris in remote drilling sites

1. Secure parts with shock-absorbing fasteners during transportation and inspect tightness after arrival; 2. Install protective covers for seals and clean the drilling site regularly

2

ZJ20T

Aluminum alloy for lightweight parts; carbon steel (Q195) for simple structural parts; neoprene rubber for seals

1. Aluminum part corrosion from humid remote environments; 2. Wear of small transmission parts due to insufficient lubrication

1. Apply anti-corrosion coating to aluminum parts and store spare parts in dry containers; 2. Implement regular lubrication checks and add lubricant every 80 operating hours

3

ZJ40BST

Alloy steel (42CrMo) for transmission parts; 316L stainless steel for corrosion-prone parts; Viton rubber for high-temperature seals

1. Transmission part fatigue from frequent start-stop in emergency drilling; 2. High-temperature seal failure from engine overheating in small-space operation

1. Limit continuous start-stop cycles to no more than 5 times per hour; 2. Ensure adequate ventilation in the operation space and monitor engine temperature in real-time