Honghuda Drawworks Parts List

1

Bolt, M30x160 (GB/T5782-1986)

4.8/8.8 grade carbon steel or alloy steel; surface galvanized or black oxide treated

1. Thread wear due to repeated assembly/disassembly; 2. Fatigue failure caused by long-term high vibration and load stress.

1. Use torque wrenches to tighten to specified torque (refer to Honghuda drawworks manual); 2. Apply anti-loosening thread lock compound (e.g., Loctite 243) for high-vibration positions; 3. Inspect thread integrity before reinstallation; replace if thread damage is found.

2

Washer, 30 (GB/T97.1-1985)

Carbon steel; surface galvanized or phosphated

1. Deformation and wear of the bearing surface due to uneven load distribution; 2. Corrosion in high-humidity oilfield environments.

1. Ensure the washer is fully seated and matches the bolt size; do not use mismatched washers; 2. Replace washers when signs of deformation (e.g., warping) or heavy corrosion are present; 3. Store spare washers in a dry, sealed container to prevent pre-corrosion.

3

Bolt, M20x90 (GB/T31.1-1988)

8.8 grade alloy steel; surface black oxide or zinc-nickel plated

1. Head shear failure caused by over-tightening; 2. Thread corrosion due to contact with hydraulic oil or drilling fluids.

1. Strictly follow the recommended tightening torque; avoid over-tightening; 2. Clean threads with a wire brush before installation; remove oil or debris; 3. For parts in contact with fluids, use corrosion-resistant plated bolts.

4

Nut, M30 (GB/T6178-1986)

4.8/8.8 grade carbon steel or alloy steel; surface galvanized

1. Thread stripping due to over-tightening or mismatched bolt threads; 2. Corrosion leading to seizing with the bolt.

1. Use nuts with matching grade to the bolt; 2. Apply anti-seize compound to threads in corrosive environments; 3. If nut seizes, use penetrating oil (e.g., WD-40) to loosen; avoid forced removal which may damage threads.

5

Pin, 6.3x50 (GB/T91-1986)

Carbon steel 45#; surface quenched and tempered

1. Shear failure due to lateral load stress; 2. Wear of the pin surface caused by repeated sliding or rotation.

1. Inspect pin fit regularly; ensure no excessive play between the pin and mating hole; 2. Lubricate pins with lithium-based grease if they are in sliding contact; 3. Replace pins immediately if signs of shear (e.g., cracks, reduced diameter) are detected.

6

Bolt, M16x50 (GB/T5783-1986)

8.8 grade alloy steel; surface zinc plated

1. Thread wear from frequent maintenance disassembly; 2. Fatigue cracking under cyclic vibration loads.

1. Mark bolts after final tightening to monitor for loosening; 2. Replace bolts that have been disassembled more than 3 times (critical positions); 3. Check for cracks using magnetic particle inspection (MPI) for high-load applications annually.

7

Washer, 16 (GB/T93-1987)

Spring steel; surface phosphated

1. Loss of elastic tension due to long-term compression; 2. Corrosion leading to brittle fracture.

1. Do not reuse washers that have lost elasticity (e.g., do not spring back when pressed); 2. Avoid using spring washers in high-temperature positions (above 120°C) as elasticity may degrade; 3. Store in a dry environment to prevent corrosion-induced brittleness.

8

Pin, 6.3x65 (GB/T91-86)

Carbon steel 45#; surface quenched

1. Shear failure due to excessive lateral load; 2. Corrosion in humid or dusty environments leading to reduced strength.

1. Ensure the pin is correctly installed with cotter pins or retaining rings to prevent axial movement; 2. Clean the pin and mating hole before installation to remove debris; 3. Inspect for corrosion and wear quarterly; replace if necessary.

9

Nut, M36 (GB/T6180-86)

8.8 grade alloy steel; surface zinc-nickel plated

1. Thread pitting corrosion due to exposure to saltwater or corrosive drilling fluids; 2. Thread damage from improper installation tools.

1. Use socket wrenches that match the nut size to avoid rounding the nut edges; 2. For offshore or high-corrosion environments, use stainless steel or zinc-nickel plated nuts; 3. Regularly inspect threads for pitting; replace if corrosion is severe.

10

Nut (GB/T6172-86)

4.8 grade carbon steel; surface galvanized

1. Loosening due to vibration; 2. Corrosion leading to thread seizing.

1. Use lock washers or anti-loosening nuts in high-vibration areas; 2. Apply anti-seize lubricant to threads during installation; 3. Check nut tightness monthly during routine maintenance.

11

Bolt, M16x35 (GB32.1-88)

8.8 grade alloy steel; surface black oxide

1. Head wear from repeated tool contact; 2. Thread fatigue under cyclic loads.

1. Use proper socket size to prevent damaging the bolt head; 2. Tighten to the specified torque and mark for loosening monitoring; 3. Replace bolts if head damage or thread wear is observed.

12

Nut, A10 (GB5647-85)

Carbon steel; surface galvanized

1. Thread stripping due to over-tightening; 2. Corrosion in humid environments.

1. Follow the recommended tightening torque; do not exceed the nut's load capacity; 2. Store spare nuts in a dry environment; 3. Replace nuts that show signs of thread damage or corrosion.

13

Pipe sleeve, 10 (GB5646-85)

Carbon steel or copper; surface plated

1. Deformation due to improper installation force; 2. Corrosion leading to reduced structural strength.

1. Install with proper tools to avoid deformation; 2. Ensure the sleeve matches the pipe diameter; 3. Replace if corrosion or deformation is detected.

14

Bolt, M16x80 (GB5782-86)

8.8 grade alloy steel; surface zinc plated

1. Thread wear from repeated assembly; 2. Fatigue failure under high vibration.

1. Apply anti-loosening thread lock compound during installation; 2. Inspect threads for damage before reinstallation; 3. Replace bolts that have been used in critical positions for more than 2 years.

15

Nut, M20 (GB/T6170-86)

8.8 grade alloy steel; surface galvanized

1. Thread seizing due to corrosion; 2. Edge rounding from improper tool use.

1. Use matching socket wrenches; avoid using pliers that may round the edges; 2. Apply anti-seize compound to threads in corrosive environments; 3. Replace nuts if seizing or edge damage occurs.

16

Washer, 20 (GB/T93-87)

Spring steel; surface phosphated

1. Loss of elasticity due to long-term compression; 2. Corrosion leading to brittle fracture.

1. Do not reuse washers that fail to spring back after compression; 2. Install washers with the correct orientation (curved side towards the nut); 3. Replace if corrosion or deformation is present.

17

Pin (JC055.07.09)

Alloy steel 20CrMnTi; surface quenched and tempered

1. Wear due to sliding contact with mating components; 2. Shear failure under lateral loads.

1. Lubricate the pin with high-temperature grease regularly; 2. Inspect the pin and mating hole for wear; replace if excessive play exists; 3. Ensure proper retaining devices (cotter pins, clips) are installed to prevent axial movement.

1

Support (JC055.07.01.00)

Q345B alloy steel; welded structure with stress relief treatment

1. Weld cracking due to cyclic load stress and vibration; 2. Wear of the mounting surface due to long-term contact and load transmission.

1. Conduct regular non-destructive testing (NDT) of welds (MPI or UT) to detect cracks; 2. Ensure the mounting surface is clean and flat before installation; use shims if necessary to level; 3. Avoid impact loads on the support during maintenance or operation.

2

Support seat (JC055.07.02.00)

Q345B alloy steel; machined surface with grinding treatment

1. Deformation of the bearing surface due to uneven load distribution; 2. Corrosion in high-humidity environments leading to reduced fit precision.

1. Inspect the bearing surface for flatness annually; regrind if deformation exceeds 0.05mm; 2. Apply anti-corrosion paint to the non-machined surfaces; touch up paint as needed; 3. Ensure proper bolt tightening to distribute load evenly across the seat.

3

Block (JC055.07.04)

Alloy steel 42CrMo; quenched and tempered for high strength

1. Wear of the contact surface due to sliding or rolling friction; 2. Fatigue cracking under repeated load impact.

1. Lubricate the contact surface with high-pressure grease regularly; 2. Inspect for wear using a micrometer; replace if wear exceeds the specified limit (refer to Honghuda manual); 3. Avoid impact loads that may cause sudden stress on the block.

4

Guard (JC055.07.05.00)

Q235 carbon steel; surface painted or galvanized

1. Deformation due to mechanical impact (e.g., during rig transportation or maintenance); 2. Corrosion from exposure to drilling fluids and atmospheric conditions.

1. Inspect the guard for deformation and damage before each operation; repair or replace if compromised; 2. Clean the guard regularly to remove drilling fluid residue and debris; 3. Touch up anti-corrosion paint annually or when paint peeling is observed.

5

Shim (JC055.07.06)

Stainless steel or carbon steel; precision ground

1. Deformation due to excessive load; 2. Corrosion leading to reduced thickness precision.

1. Select shims of the correct thickness to ensure proper alignment; do not stack excessive shims (max 3 layers); 2. Store shims in a dry environment to prevent corrosion; 3. Replace shims if they are deformed or corroded.

6

Mandril (JC055.07.07)

Alloy steel 40Cr; quenched and tempered with precision machining

1. Wear of the outer diameter due to rotational friction; 2. Fatigue cracking under torsional and bending loads.

1. Lubricate the mandril surface with anti-wear lubricant regularly; 2. Inspect the outer diameter for wear and eccentricity monthly; 3. Conduct annual NDT (MPI) to detect fatigue cracks; replace if cracks are found.

7

Support frame (JC055.07.08.00)

Q690 high-strength alloy steel; welded structure with stress relief

1. Weld cracking due to heavy load and vibration; 2. Deformation of the frame structure due to improper installation or overload.

1. Ensure the frame is installed on a level, stable foundation; 2. Conduct semi-annual NDT of critical welds; repair cracks immediately; 3. Strictly adhere to the rated load; avoid overloading the drawworks.

8

Liner, 1 (JC055.07.10)

Copper alloy or wear-resistant cast iron; precision machined

1. Wear of the inner surface due to sliding contact with shafts; 2. Seizure with the shaft due to insufficient lubrication.

1. Ensure adequate lubrication between the liner and shaft; check oil supply regularly; 2. Inspect the inner diameter for wear; replace if the wear gap exceeds 0.1mm; 3. Clean the liner and shaft surface before installation to remove debris.

9

Liner, 2 (JC055.07.11)

Wear-resistant alloy steel; surface nitrided for hardness

1. Nitride layer peeling due to impact loads; 2. Wear due to high-temperature operation.

1. Avoid impact loads on the liner during assembly and operation; 2. Monitor operating temperature; ensure it does not exceed 150°C (nitride layer stability limit); 3. Replace if nitride layer peeling or excessive wear is detected.

10

Support 2 (JC055.07.12.00)

Q345B alloy steel; machined and welded

1. Wear of the mounting hole due to shaft rotation; 2. Corrosion in humid environments leading to reduced structural integrity.

1. Lubricate the mounting hole regularly to reduce friction; 2. Inspect the mounting hole for wear and ovality; ream or replace if necessary; 3. Apply anti-corrosion treatment to the support surface annually.

1

Spring sleeve (JC055.07.03.00)

Alloy spring steel 65Mn; quenched and tempered

1. Fatigue failure due to repeated compression and expansion; 2. Deformation caused by over-compression beyond the elastic limit.

1. Ensure the spring sleeve operates within the specified compression range; avoid over-compression; 2. Inspect for deformation and cracks monthly; replace if any defects are found; 3. Lubricate the inner and outer surfaces with anti-rust grease to prevent corrosion.

2

Disc spring, B125 (GB/T1972-92)

Spring steel 50CrVA; surface phosphated or galvanized

1. Fatigue cracking due to cyclic load; 2. Elastic degradation caused by high-temperature operation.

1. Check the disc spring's elastic performance quarterly; replace if it fails to return to the original shape after compression; 2. Avoid operating in temperatures above 200°C (critical temperature for 50CrVA); 3. Store spare disc springs in a dry environment to prevent corrosion.

3

Joint, elastic, Ø80

Rubber (NBR/EPDM) with steel core; vulcanized bonding

1. Rubber aging and cracking due to high temperature and oil exposure; 2. Steel core corrosion leading to bonding failure.

1. Use compatible hydraulic oil (refer to rubber material specifications); avoid using incompatible oils that may degrade rubber; 2. Inspect for rubber cracking, bulging, or oil leakage monthly; replace if damaged; 3. Avoid excessive bending or torsion of the joint during installation.

1

Motor, 45KW (M2JA225M4A)

Stator: Silicon steel sheet; Rotor: Copper or aluminum windings; Housing: Cast iron

1. Winding insulation degradation due to overheating; 2. Bearing wear caused by insufficient lubrication or dust ingress.

1. Monitor motor temperature and current during operation; avoid overloading; 2. Lubricate bearings with high-temperature grease every 2000 operating hours; 3. Clean the motor cooling fins regularly to ensure effective heat dissipation; 4. Inspect winding insulation annually using a megohmmeter.

2

Reducer, K167 (K167-B-270°-B3)

Housing: Cast iron; Gears: Alloy steel 20CrMnTi (carburized); Shafts: 42CrMo

1. Gear tooth wear and pitting due to insufficient or contaminated lubricating oil; 2. Shaft bearing failure caused by misalignment.

1. Use the specified grade of gear oil (refer to reducer manual); replace oil and filter every 5000 operating hours; 2. Ensure proper alignment between the reducer and motor/drum using laser alignment tools; 3. Monitor reducer noise and vibration; abnormal sounds indicate potential gear or bearing issues.

3

Rotor seal (QF515)

Fluororubber (Viton) or nitrile rubber; metal reinforcement ring

1. Seal lip wear due to rotational friction; 2. Seal degradation caused by high temperature and hydraulic oil exposure.

1. Replace seals every 1500 operating hours or when oil leakage is detected; 2. Ensure the seal installation surface is clean and free of burrs; 3. Use a seal installer tool to avoid damaging the seal lip during installation.

4

Clutch drive flange (JC023.20.01)

Alloy steel 42CrMo; quenched and tempered; surface precision machined

1. Wear of the flange surface due to clutch engagement impact; 2. Bolt hole deformation due to uneven torque.

1. Ensure smooth clutch engagement; avoid sudden engagement which may cause impact; 2. Tighten flange bolts evenly using a torque wrench; 3. Inspect the flange surface for wear and cracks quarterly; replace if necessary.

5

Shaft end cover (JC023.20.02)

Cast iron or aluminum alloy; seal groove with rubber O-ring

1. Seal failure due to O-ring aging; 2. Cover deformation caused by improper installation.

1. Replace the O-ring whenever the end cover is removed; 2. Install the end cover evenly, tightening bolts in a crisscross pattern; 3. Inspect for oil leakage after installation; 4. Clean the cover surface regularly to prevent dust accumulation.

6

Clutch, LT500/250T

Friction plates: Ceramic or organic friction material; Pressure plate: Alloy steel; Springs: Spring steel

1. Friction plate wear due to frequent engagement; 2. Spring fatigue failure caused by cyclic compression.

1. Adjust clutch clearance according to the manual to ensure proper engagement; 2. Inspect friction plate thickness monthly; replace when wear exceeds the limit; 3. Lubricate clutch release mechanisms regularly; 4. Avoid prolonged semi-engagement which may cause overheating.

7

Steel wire

High-strength carbon steel wire; galvanized or oil-tempered

1. Fatigue wear due to repeated bending and tension; 2. Corrosion and wire breakage caused by exposure to moisture and chemicals.

1. Inspect steel wire for broken strands, corrosion, and wear daily; replace if more than 5% of wires are broken; 2. Avoid kinking or sharp bending of the wire; 3. Lubricate the wire with anti-rust oil regularly; 4. Store spare wire in a dry, coiled position to prevent deformation.

8

Drum drive flange (JC023.50.02)

Alloy steel 40CrNiMoA; forged and machined

1. Wear of the connecting surface with the drum; 2. Fatigue cracking under high torque.

1. Ensure the flange is properly aligned with the drum; use dowel pins for precise positioning; 2. Tighten connecting bolts to the specified torque; 3. Conduct annual NDT (MPI) to detect fatigue cracks; replace if cracks are found.

1

Quick release valve (KPJ-L15)

Valve body: Aluminum alloy or carbon steel; Spool: Alloy steel; Seal: Nitrile rubber

1. Valve spool wear due to contaminated hydraulic oil; 2. Seal failure leading to pressure loss.

1. Ensure hydraulic oil is clean; replace filters regularly; 2. Inspect valve operation monthly; check for smooth movement and no leakage; 3. Disassemble and clean the valve every 2000 operating hours; replace worn spools or seals.

2

Pressure gauge, 060 (0〜1MPa) M14X1 (Y-60)

Case: Iron or plastic; Bourdon tube: Brass or stainless steel

1. Bourdon tube fatigue failure due to pressure fluctuations; 2. Dial fogging caused by moisture ingress.

1. Avoid sudden pressure spikes; install a pressure relief valve upstream if necessary; 2. Check gauge accuracy annually against a standard gauge; 3. Replace gauges with fogged dials or inaccurate readings; 4. Use a gauge protector to prevent mechanical damage.

3

Filter, second, NPT1" (ELY-00)

Housing: Carbon steel; Filter element: Stainless steel mesh or paper

1. Filter element clogging due to oil contamination; 2. Housing corrosion leading to leakage.

1. Replace filter elements every 1000 operating hours or when differential pressure exceeds the limit; 2. Clean the filter housing when replacing elements; 3. Inspect the housing for corrosion and leakage quarterly; 4. Use filter elements of the correct specification (do not use non-original elements).

4

Elbow, NPT1"

Carbon steel, stainless steel, or brass; threaded connection

1. Thread wear and leakage due to repeated assembly; 2. Corrosion in corrosive oil or environmental conditions.

1. Use thread seal tape or pipe dope during installation to ensure a tight seal; 2. Avoid over-tightening which may damage threads; 3. For corrosive environments, use stainless steel elbows; 4. Inspect for leakage during routine maintenance.

5

Pressing Rubber pipe, NPT1"

Inner tube: Nitrile rubber; Reinforcement: Steel wire braid; Outer cover: Rubber

1. Rubber aging and cracking due to high temperature and oil exposure; 2. Steel wire reinforcement corrosion leading to burst failure.

1. Replace rubber pipes every 2 years or when cracks, bulges, or hardening are observed; 2. Avoid bending the pipe beyond its minimum bend radius; 3. Protect pipes from mechanical damage and direct sunlight; 4. Ensure the pipe is compatible with the hydraulic oil type.

6

Oil pump, KCB83.3

Housing: Cast iron; Rotor: Alloy steel; Gear: Carbon steel

1. Gear wear due to contaminated oil; 2. Seal failure leading to oil leakage; 3. Bearing wear caused by insufficient lubrication.

1. Ensure the pump is primed before starting; avoid dry running; 2. Use clean oil and replace filters regularly; 3. Inspect for oil leakage and abnormal noise during operation; 4. Lubricate bearings according to the manual; replace worn gears or seals promptly.

7

Ball valve, NPT1"

Valve body: Carbon steel or stainless steel; Ball: Stainless steel; Seal: PTFE

1. Seal wear due to ball rotation; 2. Valve body corrosion leading to leakage.

1. Operate the valve smoothly; avoid sudden opening/closing; 2. Inspect for leakage when the valve is in both open and closed positions; 3. Lubricate the valve stem regularly with anti-corrosion grease; 4. Replace valves with worn seals or corroded bodies.

8

Filter, first, NPT1" (CLY-00)

Housing: Carbon steel; Filter element: Coarse stainless steel mesh

1. Filter element clogging due to large particle contamination; 2. Housing corrosion.

1. Clean or replace the filter element every 500 operating hours; 2. Inspect the housing for corrosion and damage quarterly; 3. Install a pressure gauge upstream to monitor for clogging; 4. Ensure the filter is installed in the correct flow direction.

9

Check valve, S20A1 (NPT1)

Valve body: Carbon steel; Disc: Alloy steel; Spring: Spring steel

1. Disc wear due to fluid flow impact; 2. Spring fatigue leading to improper closing.

1. Inspect the check valve for reverse flow monthly; 2. Disassemble and clean the valve every 1500 operating hours; 3. Replace worn discs or fatigued springs; 4. Ensure the valve is installed in the correct flow direction.

10

Filter cap, 3"

Carbon steel or plastic; surface painted or plated

1. Thread wear due to repeated opening; 2. Deformation caused by mechanical impact.

1. Open and close the cap gently to avoid thread damage; 2. Inspect the cap gasket for wear; replace if necessary to ensure a tight seal; 3. Store spare caps in a dry environment; 4. Replace caps that are deformed or have damaged threads.

11

Tee, NPT1"

Carbon steel, stainless steel, or brass; threaded

1. Thread leakage due to improper installation; 2. Corrosion in corrosive environments.

1. Use thread sealant during installation; tighten evenly; 2. Avoid over-tightening which may crack the tee; 3. For corrosive fluids, use stainless steel tees; 4. Inspect for leakage during routine maintenance.

12

Hose, NPTT-1000

Inner tube: Rubber; Reinforcement: Steel wire; Outer cover: Abrasion-resistant rubber

1. Outer cover wear due to friction with surrounding components; 2. Inner tube degradation due to oil contamination.

1. Route the hose to avoid contact with sharp edges or moving parts; use hose protectors if necessary; 2. Replace hoses every 2 years or when outer cover wear, cracks, or bulges are found; 3. Ensure the hose is not twisted during installation; 4. Use the correct hose clamp size to avoid damaging the hose.

13

Bushing, NPT1 1/2"-1"

Brass or stainless steel; precision machined

1. Thread wear due to repeated assembly; 2. Corrosion leading to seizing.

1. Use thread seal tape during installation; avoid over-tightening; 2. Apply anti-seize compound to threads in corrosive environments; 3. Replace bushings if threads are damaged or seized; 4. Ensure the bushing matches the pipe thread size.

14

Joint, inside, NPT 1"

Carbon steel or stainless steel; internal thread

1. Thread wear and corrosion; 2. Leakage due to improper sealing.

1. Clean threads before installation; use thread sealant; 2. Tighten to the specified torque; 3. Inspect for leakage after installation; 4. Replace joints with damaged threads or corrosion.

15

Joint, active, NPT1"

Carbon steel or stainless steel; swivel joint with ball bearings

1. Bearing wear due to rotational friction; 2. Seal failure leading to leakage.

1. Lubricate the swivel bearing regularly with lithium-based grease; 2. Inspect for leakage and smooth rotation monthly; 3. Replace seals if leakage is detected; 4. Avoid excessive axial or radial loads on the joint.

16

Pipeline, hydraulic power unit-baffle plate (13 II NPT3/8"-700)

Carbon steel or stainless steel; seamless pipe

1. Pipe corrosion due to fluid or environmental conditions; 2. Pipe bending or cracking due to vibration.

1. Secure the pipeline with proper brackets to reduce vibration; 2. Inspect for corrosion, cracks, and leaks quarterly; 3. For corrosive environments, use stainless steel pipes or apply anti-corrosion coating; 4. Avoid bending the pipe beyond its minimum bend radius during installation.

17

Joint, NPT3/8"-NPT1/4"

Brass or stainless steel; reducing thread

1. Thread wear due to repeated assembly; 2. Leakage due to mismatched threads.

1. Ensure the joint matches the pipe thread sizes (3/8" and 1/4"); 2. Use thread seal tape on both ends; 3. Tighten evenly to avoid thread damage; 4. Inspect for leakage after installation.

18

Tube adapter

Brass or stainless steel; precision machined

1. Seal wear due to tube insertion and removal; 2. Corrosion leading to leakage.

1. Insert the tube fully into the adapter; use the correct crimping tool if it's a crimp-on adapter; 2. Inspect the seal for wear when disconnecting; replace if necessary; 3. Apply anti-corrosion grease to the adapter surface; 4. Store spare adapters in a dry environment.