Drilling Rig Components Classification: Core Parts for ZJ Series Rigs

1

Drawworks

JC50B

High-strength alloy steel (gear box); 42CrMo (main shaft)

1. Continuous high-torque transmission leading to gear tooth surface fatigue; 2. Inadequate lubrication causing bearing wear

1. Regularly check lubricating oil quality and replace it according to the operating hours specified in API Spec 7K; 2. Avoid sudden load changes during hoisting operations to reduce impact on gears

2

Crown Block

TC315

40CrNiMoA (sheave); Q345B (frame)

1. Abrasion from sand and gravel in the drilling fluid adhering to the rope; 2. Uneven stress distribution due to misalignment of rope winding

1. Clean the sheave groove regularly and apply anti-wear grease that meets NLGI Grade 2 standard; 2. Check the rope alignment daily and adjust the guide wheel position in time if deviation is found

3

Travelling Block

YC315

40CrNiMoA (sheave); alloy steel (axle)

1. Impact load during drilling tool lowering causing sheave edge chipping; 2. Corrosion from drilling fluid immersion in humid environments

1. Control the lowering speed of drilling tools to within 0.5m/s to reduce impact; 2. Apply anti-corrosion coating to the outer surface every 3 months and check for coating damage regularly

4

Hook

DG315

20CrMnTi (hook body); 42CrMo (pin shaft)

1. Fatigue crack caused by repeated hoisting load; 2. Wear of the hook mouth due to long-term contact with drilling tools

1. Conduct non-destructive testing (UT/MT) every 6 months as per API Spec 8A; 2. Use a hook sleeve matching the drilling tool specification to avoid direct contact between the hook mouth and the drilling tool

5

Swivel

SL450

Stainless steel (rotary joint); alloy steel (shell)

1. Seal failure due to high-pressure drilling fluid scouring; 2. Bearing wear caused by misalignment of the rotating shaft

1. Check the seal pressure regularly and replace the seal ring if leakage is found; 2. Calibrate the coaxiality of the rotating shaft monthly to ensure it is within 0.05mm

6

Mud Pump

F1600*2, F1300*2

High-chromium alloy (cylinder liner); 40Cr (connecting rod)

1. Erosion of the cylinder liner by solid particles in the drilling fluid; 2. Overheating of the pump body due to insufficient cooling water flow

1. Ensure the drilling fluid solid control system is effective, with the solid content controlled below 5%; 2. Monitor the cooling water flow rate in real time, ensuring it is not less than 50L/min

1

Drawworks

JC70B

Nickel-chromium alloy steel (gear); 42CrMoV (main shaft)

1. High-temperature wear of gears due to long-term high-load operation; 2. Gear tooth breakage caused by sudden overload during emergency hoisting

1. Install a temperature monitoring system, and stop operation when the gear box temperature exceeds 85℃; 2. Set a load limiter and ensure it is calibrated quarterly to avoid overload

2

Crown Block

TC450

42CrNiMoA (sheave); Q690 (frame)

1. Fatigue wear of the sheave bearing under high-frequency load; 2. Corrosion of the frame due to long-term exposure to acidic drilling fluid mist

1. Replace the bearing every 1500 operating hours; 2. Install a protective cover to prevent drilling fluid mist from adhering to the frame and clean the frame weekly

3

Travelling Block

YC450

42CrNiMoA (sheave); alloy steel (suspension shaft)

1. Sheave groove wear caused by high-tension steel wire rope friction; 2. Shaft bending due to uneven stress during lateral movement

1. Check the sheave groove wear depth monthly, and replace if it exceeds 3mm; 2. Limit the lateral movement range of the travelling block to within ±50mm during operation

4

Hook

DG450

20CrMnTi (hook body); 40CrNiMo (pin shaft)

1. Fatigue failure of the hook neck under repeated heavy load; 2. Thread wear of the locking nut due to vibration during drilling

1. Strictly follow the load limit, not exceeding 80% of the rated load for long-term operation; 2. Apply anti-loosening glue to the locking nut and check the tightness weekly

5

Swivel

SL450

Duplex stainless steel (rotary joint); alloy steel (shell)

1. Wear of the rotating bearing due to high-speed rotation under high pressure; 2. Seal damage caused by drilling fluid containing corrosive media

1. Use high-pressure resistant lubricating grease and replenish it every 200 operating hours; 2. Test the corrosion resistance of the drilling fluid regularly and add corrosion inhibitors if necessary

6

Mud Pump

F1600*2

High-chromium cast iron (cylinder liner); 42CrMo (crankshaft)

1. Cavitation damage to the cylinder liner due to insufficient suction pressure; 2. Valve seat wear caused by frequent opening and closing under high pressure

1. Ensure the suction pipeline is unobstructed and the suction pressure is maintained above 0.1MPa; 2. Replace the valve seat every 800 operating hours and check the valve sealing performance daily

1

Drawworks

JC50B (Adapted for ZJ90 Series)

High-temperature alloy steel (gear); 42CrMoV (main shaft)

1. Gear wear caused by high temperature (above 120℃) in ultra-deep well operations; 2. Shaft deformation due to combined high torque and high pressure

1. Equip with forced cooling system to keep the gear box temperature below 90℃; 2. Conduct non-destructive testing of the main shaft every 3 months to check for deformation

2

Crown Block

TC315 (Adapted for ZJ90 Series)

42CrNiMoA (sheave); Q960 (frame)

1. Sheave bearing failure due to high-frequency vibration in ultra-deep drilling; 2. Frame stress concentration caused by uneven load distribution

1. Use vibration-damping bearings and check the vibration amplitude weekly; 2. Optimize the load distribution structure and conduct stress testing annually

3

Travelling Block

YC315 (Adapted for ZJ90 Series)

42CrNiMoA (sheave); high-strength alloy steel (axle)

1. Severe wear of the sheave groove due to ultra-high tension steel wire rope; 2. Corrosion of the axle due to high-temperature and high-pressure drilling fluid

1. Use ultra-high wear-resistant steel wire rope and check the sheave groove wear weekly; 2. Apply high-temperature and corrosion-resistant coating to the axle and inspect monthly

4

Hook

DG315 (Adapted for ZJ90 Series)

20CrMnTiH (hook body); 40CrNiMoA (pin shaft)

1. Fatigue crack of the hook body under ultra-high load cyclic action; 2. Pin shaft wear caused by high-temperature creep

1. Strictly implement load monitoring and avoid overloading by more than 10% even in emergency; 2. Use high-temperature resistant pin shaft and replace it every 1000 operating hours

5

Swivel

SL450 (Adapted for ZJ90 Series)

Super duplex stainless steel (rotary joint); heat-resistant alloy steel (shell)

1. Seal failure due to high-temperature and high-pressure drilling fluid scouring; 2. Bearing wear caused by high-speed rotation under extreme conditions

1. Use high-temperature and high-pressure resistant seals and replace them every 500 operating hours; 2. Monitor the bearing temperature in real time and stop operation if it exceeds 100℃

6

Mud Pump

F1600*2 (Adapted for ZJ90 Series)

Ceramic-lined high-chromium alloy (cylinder liner); 42CrMoV (connecting rod)

1. Cylinder liner erosion by high-velocity solid particles in ultra-deep well drilling fluid; 2. Connecting rod fatigue due to high-frequency reciprocating motion under high load

1. Install a high-efficiency solid control device to reduce the solid particle size in drilling fluid to below 0.1mm; 2. Conduct fatigue life assessment of the connecting rod every 1500 operating hours

1

Drawworks

JC30B

Alloy steel (gear); 45# steel (main shaft)

1. Gear wear caused by insufficient lubrication in intermittent operation; 2. Shaft wear due to foreign particles entering the bearing

1. Regularly check the lubricating oil level and replenish in time; 2. Install a dust cover at the bearing end to prevent foreign particles from entering

2

Crown Block

TC170

40Cr (sheave); Q235B (frame)

1. Sheave groove wear due to low-quality steel wire rope friction; 2. Frame corrosion caused by outdoor exposure to rain and snow

1. Use steel wire rope that meets API Spec 9A standard; 2. Paint the frame annually and check for rust spots regularly

3

Travelling Block

YC170/YG170

40Cr (sheave); 45# steel (axle)

1. Axle wear caused by poor lubrication; 2. Sheave damage due to collision with drilling tools during lifting

1. Apply lubricating grease to the axle every 300 operating hours; 2. Control the lifting speed and avoid collision between the travelling block and drilling tools

4

Hook

DG225/YG170

20Cr (hook body); 40Cr (pin shaft)

1. Hook mouth wear due to long-term contact with irregular drilling tools; 2. Pin shaft loosening caused by vibration during drilling

1. Use a buffer pad between the hook mouth and drilling tools; 2. Check the pin shaft tightness every shift and fasten if loose

5

Swivel

SL170

Stainless steel (rotary joint); carbon steel (shell)

1. Seal leakage due to improper installation; 2. Bearing wear caused by low-speed and heavy-load operation

1. Follow the installation manual to ensure correct seal installation; 2. Conduct regular bearing inspection and replace if there is abnormal noise

6

Mud Pump

F1000*1

High-chromium cast iron (cylinder liner); 45# steel (piston rod)

1. Cylinder liner wear caused by solid particles in the drilling fluid; 2. Piston rod corrosion due to insufficient cleaning after operation

1. Strengthen drilling fluid filtration to reduce solid content; 2. Clean the piston rod with clean water and apply anti-rust oil after operation

1

Drawworks

JC40B

40CrNiMo (gear); 42CrMo (main shaft)

1. Gear tooth surface pitting due to repeated moderate load; 2. Bearing overheating caused by poor heat dissipation in closed space

1. Regularly grind the gear tooth surface to remove pitting; 2. Clean the heat dissipation fins of the gear box monthly to ensure good heat dissipation

2

Crown Block

TC225

40CrNiMo (sheave); Q345B (frame)

1. Sheave bearing wear caused by intermittent high load; 2. Frame deformation due to improper transportation and installation

1. Replace the bearing every 1200 operating hours; 2. Use professional lifting equipment during transportation and installation to avoid collision

3

Travelling Block

YC225

40CrNiMo (sheave); alloy steel (axle)

1. Sheave groove wear due to steel wire rope misalignment; 2. Axle fatigue caused by cyclic load

1. Adjust the steel wire rope guide device to ensure alignment; 2. Conduct fatigue testing of the axle every 6 months

4

Hook

DG225

20CrMnTi (hook body); 40Cr (pin shaft)

1. Hook body wear caused by long-term contact with drilling tools; 2. Pin shaft corrosion due to humid environment

1. Use a wear-resistant sleeve for the hook body; 2. Apply anti-corrosion oil to the pin shaft every month and store in a dry environment when not in use

5

Swivel

SL225

Stainless steel (rotary joint); alloy steel (shell)

1. Rotating joint wear due to high-speed rotation; 2. Seal damage caused by drilling fluid contamination

1. Monitor the rotation speed and avoid exceeding the rated speed; 2. Filter the drilling fluid to remove impurities and check the seal regularly

6

Mud Pump

F1300*2

High-chromium alloy (cylinder liner); 42CrMo (connecting rod)

1. Cylinder liner wear caused by high-pressure drilling fluid scouring; 2. Valve wear due to frequent opening and closing

1. Control the drilling fluid pressure within the rated range; 2. Check the valve condition daily and replace the valve core if worn