Product Introduction
This curated assortment covers all mission-critical mechanical, hydraulic, pneumatic, sealing, and structural components for the JC-70DB drawworks, including high-load SKF bearings, precision fasteners, air/water pipe assemblies, seal kits, brake caliper parts, gearbox shafts, lubrication system components, and air control valves. All parts undergo factory load and pressure testing validated for the drawworks’ rated 70-ton lifting capacity and continuous heavy-duty duty cycle, with full material traceability and compliance with API oilfield equipment standards. The lineup features hardened alloy steel structural parts, high-temperature resistant seals, corrosion-resistant pipe fittings, and precision-machined wear components, fully mapped to JC-70DB drawing references for simplified inventory management and emergency field repairs.
Functional Performance Specifications
These JC-70DB drawworks spare parts deliver industry-leading oilfield reliability: OEM SKF heavy-duty bearings withstand radial loads up to 280MPa, with a service life of 22,000+ operating hours and reduced friction loss by 45%; pneumatic air control components maintain stable 1.6MPa operating pressure, eliminating air leaks and ensuring responsive drawworks actuation; cooling and lubrication pipe assemblies resist corrosion and blockages, sustaining consistent fluid circulation; brake caliper assemblies deliver reliable stopping power for 70-ton loads, with wear-resistant pad assemblies extending brake service intervals by 35%; and precision fasteners maintain tight torque retention, preventing component loosening under heavy rig vibration.
Structural & Material Features
- OEM Precision Machining: All structural, bearing, and wear components are manufactured to tight tolerances (±0.0003 inch), ensuring perfect fitment with JC-70DB drawworks drum, gearbox, and brake assemblies per original design drawings.
- Heavy-Duty Premium Materials: Bearings use high-grade SKF alloy steel, seals use fluoroelastomer for oil/heat resistance, pipe fittings use corrosion-resistant steel, and fasteners use 8.8-grade high-strength carbon steel for heavy-load durability.
- Leak-Proof Sealing Design: Multi-type O-rings, V-type seals, and oil seals create tight, long-lasting joints for pneumatic, water, and lubrication systems, preventing fluid loss and contamination.
- Vibration-Resistant Construction: Reinforced bearing seats, lock nuts, and circlips absorb heavy rig vibration, eliminating premature component failure during continuous drawworks operation.
- Modular Assembly Design: Pre-engineered pipe clamps, bearing spacers, and caliper components reduce overhaul time by 60%, minimizing non-productive downtime during critical repairs.
Applicable Operating Conditions
These spare parts are built for extreme land and offshore drilling environments, optimized for the JC-70DB 70-ton electric drawworks installed on drilling rigs, workover platforms, and exploration units. They perform reliably in ambient temperatures ranging from -40°F to 158°F, resist exposure to drilling mud, engine oil, saltwater, and heavy rig vibration, and endure continuous high-load drill string lifting operations. Components are suitable for offshore hazardous locations and fully comply with API 7K and IADC drilling safety standards.
Maintenance & Service Recommendations
- Inspect gearbox bearings, bearing seats, and oil seals every 6 months for wear, scoring, or leakage; replace worn SKF bearings and seals immediately to maintain smooth power transmission.
- Check air control system valves, pipe clamps, and rubber hoses quarterly for cracks, air leaks, or blockages; replace degraded components to ensure responsive drawworks actuation.
- Flush cooling water and lubrication pipelines semi-annually, inspect pipe assemblies and O-rings for corrosion or damage, and replace worn fittings to sustain consistent fluid circulation.
- Inspect brake caliper assemblies, pad wear, and return springs every 3 months; replace worn brake pads, bearings, and cotter pins to maintain reliable emergency stopping capacity.
- Retorque all high-strength bolts and nuts to OEM torque specifications every 5,000 operating hours, and replace damaged fasteners to prevent structural loosening.
- Stock critical high-wear parts (bearings, seals, brake pads, pipe clamps, O-rings) at recommended minimum levels to avoid unplanned drawworks shutdowns.
- We supply the following spare parts:
| SR No | PART No. | DESCRIPTION |
| 1 | JC70DB-17.00 | Air-control system |
| 2 | JC70DB-02 | Bolt M36x125 |
| 3 | T100-006.00 | Rope clamp |
| 4 | JC70DB-03 | Bolt M36x120 |
| 5 | JC70DB-05 | Pin shaft Ø 9.5×32 |
| 6 | JC70DB-07 | Movable screw bolt M12x70 |
| 7 | TYJ03.00 | Wire line stop sheave |
| 8 | JC70DB-09 | Bolt M36x160 |
| 9 | JC50DB01-23 | Adjustable washer III |
| 10 | JC70DB01-17 | Adjustable washer I |
| 11 | JC70DB-31-00 | Waterway conduit |
| 12 | GB/T6170-M36-6 | Nut M36 |
| 13 | GB/T6172-M36-6 | Thin Nut M36 |
| 14 | Z03-01 | Check nut M36 |
| 15 | GB/T5782-M12x25-4.6 | Bolt M 12×25 |
| 16 | GB/T93-87-12 | Grower washer 12 |
| 17 | GB/T62-M12-5 | Saucer nut M12 |
| 18 | GB/T5783-M16x40-8.8 | Bolt M16x40 |
| 19 | GB93-87-16 | Grower washer 16 |
| 20 | GB/T97.1-12 | Plain washer 12 |
| 21 | GB/T6170-M12-6 | Nut M12 |
| 22 | GB/T5782-M12x40-6.8 | Bolt M 12×40 |
| 23 | 70DBSL-01.01.00 | Inlet pipe assembly |
| 24 | 70DBSL-01.02.00 | Return pipe assembly |
| 25 | BV-RC1 | Ball valve RC1 |
| 26 | QB/HTQ-05 | Hose adapter Փ 25x^35 |
| 27 | RT-Փ 25x Փ 35 | Rubber tube Փ 25x^35 |
| 28 | RT-Փ 51x^63 | Rubber tube Փ 51x Փ 63 |
| 29 | GB/T3452.1-1992-90 X 5.3 | O-ring 90X5.3 |
| 30 | JC70DB-13.17.03 | Pipe clamp assembly |
| 31 | GB3452.1-92-33.5X3.55 | O-ring 33.5X3.55 |
| 32 | GB3289.26-86-R1 1/4 | Inside adapter R1 1/4 |
| 33 | T005-010.00 | Pipe clamp assembly Փ19 |
| 34 | QB/HTQ-09 | Adapter M 16×1.5G-R1/4 |
| 35 | QB/HTQ-04 | Hose connector Փ 16x Փ 28 |
| 36 | QB/HTQ-03 | Hose connector G10x019 |
| 37 | FV-NPT1/2 | Fast air release valve NPT 1/2 |
| 38 | RF-XJ-L15 | Rotary table fitting outlet XJ-L15 |
| 39 | BV-RC1/2 | Ball valve RC1/2 |
| 40 | GB/T5781-2000-M12x50-4.8 | Bolt M12x50 |
| 41 | GB93-87-12 | Washer 12 |
| 42 | RT-Փ 16x Փ 28 | Rubber tube Փ 16x Փ 28 |
| 43 | RT-Փ 10X Փ 19 | Rubber tube Փ 10xՓ 19 |
| 44 | JC70DB-18.15.00 | Pipe clamp assembly Փ50 |
| 45 | JC70DB-18.16.00 | Pipe clamp assembly Փ38 |
| 46 | T001-1702 | Copper packing |
| 47 | T001-1701 | Copper packing |
| 48 | T005-001.00 | Pipe clamp assembly Փ10 |
| 49 | Z03-24 | Electric type oil pressure gauge assembly |
| 50 | QB/HTQ-83 | Casing Փ10 |
| 51 | QB/HTQ-69 | Nut M16x1.5 |
| 52 | GB3452.1-92-28×3.55 | O-ring 28×3.55 |
| 53 | JB982-77-40 | Combination washer 40 |
| 54 | MG30G1.2 | Choke valve MG30G1.2 |
| 55 | JB1885-77-25I | A-pigeonholding type hose 25I – |
| 56 | GB3452.1-92-23.6×3.55 | O-ring 23.6×3.55 |
| 57 | JB1885-77-25 I | A-pigeonholding type hose 25I – |
| 58 | JB1885-77-25I | A-pigeonholding type hose 25I – |
| 59 | Z03-38 | Oil pressure detection equipment ZYJ10-3 |
| 60 | GB3452.1-92-42.5×3.55 | O-ring 42.5×3.55 |
| 61 | JB1885-77-45I | A-pigeonholding type hose 45I- |
| 62 | QU1-E250x40DFP | Oil filter QU1-E250x40DFP |
| 63 | GB/T70.1-2000-M12x90 | Allen screw M12x90 |
| 64 | GB93-87-12 | Washer 12 |
| 65 | GB/T5781-2000-M16x45-8.8 | Bolt M16x45 |
| 66 | GB93-87-16 | Washer 16 |
| 67 | SPG-1.6 | Shockproof pressure gauge YN-60(0-1.6Mpa) |
| 68 | QB/HTQ-23 | Pressure gauge connector M14x1.5-R1/4 |
| 69 | AF-E40/0.5 | Safety Valve AF-E40-0.5 |
| 70 | JC50DB01-05.13.00 | Pipe clamp Փ 10 |
| 71 | GB1152-79-M10X1 | Alemite M10x1 |
| 72 | JC70DB-13.03 | Spacer(1) |
| 73 | JC70DB-13.04 | Left bearing seat |
| 74 | JC70DB-13.05 | Washer set (2) |
| 75 | JC70DB-13.07 | Spacer(1) |
| 76 | JC70DB-13.11 | Spacer(1) |
| 77 | JC70DB-13.14.00 | Right bearing seat |
| 78 | JC70DB-13.15 | Bolt M36 x120 |
| 79 | JC70DB-13.16 | Bolt M 36×130 |
| 80 | AF0000030100 | Air-water coupling |
| 81 | AF0000010600 | Water/gas instrument devices |
| 82 | GB32.1-88-M20x45-5.8 | Bolt with hole M20x45 |
| 83 | GB93-87-20 | Washer 20 |
| 84 | GB/T288-94-23148CA | Bearing 23148CA/W33/240 x 400 x 128 |
| 85 | GB/T6170-2000-M36-5 | Nut M36 |
| 86 | GB93-87-36 | Washer 36 |
| 87 | GB/T5782-2000-M20x50-6.8 | Bolt M20x50 |
| 88 | GB9877.1-88-260x300x20 | Oil seal 260x300x20 |
| 89 | GB32.1-88-M8x20-5.8 | Bolt with hole M8x20 |
| 90 | GB93-87-8 | Washer 8 |
| 91 | Z03-67 | Wire Փ1.5 |
| 92 | JC70DB-13.10.02 | Screw M30X330 |
| 93 | GB/T6170-2000-M30-8 | Nut M30 |
| 94 | GB93-87-30 | Washer 30 |
| 95 | JC40D01-02.01.22 | Pressure spring |
| 96 | HG4-337-66-70×95 | V-type weave seal(A)70×95 |
| 97 | JC40D01-02.01.18 | Shaft sleeve |
| 98 | JC40D01-02.01.24 | Gasket |
| 99 | JC50DB01-02.15.15 | Washer I |
| 100 | JC50DB01-02.15.18 | Washer II |
| 101 | JC50DB01-02.15.21 | Washer III |
| 102 | JC50DB01-02.15.22 | Ventilate plug R1/2 |
| 103 | T007-001.00 | Oil spill mouth |
| 104 | GB1152-79-M10X1 | Alemite M10x1 |
| 105 | HG4-692-67-100X 130×12 | Oil seal PD100 x130x12 |
| 106 | GB/T858-2000-85 | Washer 85 |
| 107 | GB/T5782-2000-M10x35-5.8 | Bolt M10x35 |
| 108 | GB93-87-10 | Grower washer 10 |
| 109 | GB276-64-214 | Bearing 214(70x125x24) |
| 110 | GB/T68-2000-M6x 15-5.8 | Socket screw M6x 15 |
| 111 | HG4-692-67-50x70x12 | Oil seal PD50x70x12 |
| 112 | GB276-64-208 | Bearing 208(40x80x18) |
| 113 | GB/T894.2-2000-40 | Elastic circlip used in oil 40 |
| 114 | HG4-692-67-40x65x12 | Oil seal PD 40x65x12 |
| 115 | GB/T893.1-2000-80 | Elastic circlip used in hole 80 |
| 116 | GB/T5781-2000-M10x25 | Bolt M 10×25 |
| 117 | GB3452.1-92-74×5.3 | O-ring 74×5.3 |
| 118 | GB/T5782-2000-M12x45 | Bolt M 12×45 |
| 119 | GB93-87-12 | Grower washer 12 |
| 120 | JC40D01-02.15.22 | Pressure spring |
| 121 | Z03-86HG4-337-66-70×95 | V type seal ring (A)70×95 |
| 122 | JC40D01-02.01.18 | Shaft sleeve |
| 123 | JC40D01-02.01.24 | Gasket |
| 124 | T007-001.00 | Oil spill fitting |
| 125 | GB1152-79-M10X1 | Grease fitting M10x1 |
| 126 | HG4-692-77-100X 130×12 | Oil seal PD 100x130x12 |
| 127 | GB/T5782-2000-M10x35-5.8 | Bolt M 10×35 |
| 128 | GB93-87-10 | Spring washer 10 |
| 129 | GB276-64-218 | Bearing 218(90x160x30) |
| 130 | GB/T68-2000-M6x 15-5.8 | Socket screw M6x 15 |
| 131 | GB3452.1-82-74×5.2 | O-ring 74×5.3 |
| 132 | GB/T5782-2000-M20x45-4.8 | Bolt M20x45 |
| 133 | GB93-87-20 | Spring washer 20 |
| 134 | GB/T858-2000-85 | Washer 85 |
| 135 | GB/T5783-2000-M16x40-8.8 | Bolt M 16×40 |
| 136 | GB3452.1-88-38.7×3.55 | O-ring 38.7×3.55 |
| 137 | GB/T5783-2000-M20x75-8.8 | Bolt M 20×75 |
| 138 | SKF-22336CC/W33-C3 | Bearing 22336CC/W33-C3(180×380 x126) |
| 139 | JB/ZQ4224-86-180×5.7 | O-ring 180×5.7 |
| 140 | AF7003030400-5-11 | Disc |
| 141 | AF7003030400-5-12 | Disc |
| 142 | AF7003030400-5-15 | Disc |
| 143 | AF7003030400-5-16 | Disc |
| 144 | GB/T5783-2000-M24x60-8.8 | Bolt M 24×60 |
| 145 | SKF-24048CC/W33 | Bearing 24048CC/W33(240x360x118) |
| 146 | GB/T5783-2000-M20x60-8.8 | Bolt M 20×60 |
| 147 | AF7003030400-6-10 | Oil disc |
| 148 | AF7003030400-6-11 | Oil disc |
| 149 | GB879-86-5×30 | Pin Փ 5×30 |
| 150 | JB/ZQ4224-86-230×5.7 | O-ring 230×5.7 |
| 151 | SKF-NU2228CM | Bearing NU2228cM(140x250x68) |
| 152 | SKF-QJ226N2MA | Bearing QJ226N2MA(130x230x40) |
| 153 | GB858-88-125 | Washer 125 |
| 154 | SKF-NU2226ECM | Bearing NU2226ECM( 130x230x64) |
| 155 | AF7003030400-8-10 | Oil disc |
| 156 | AF7003030400-8-11 | Oil disc |
| 157 | GB879-86-6×30 | Pin 6×30 |
| 158 | SKF-22244CC/W33 | Bearing 22244CC/W33(220x400x 108) |
| 159 | SKF-22344CC/W33 | Bearing 22344CC/W33(220x460x 145) |
| 160 | GB/T5783-2000-M20x45-8.8 | Bolt M 20×45 |
| 161 | GB/T5783-2000-M30X145-8.8 | Bolt M 30×145 |
| 162 | GB/T6170-2000-M30-8 | Nut M30 |
| 163 | GB/T5783-2000-M20x45-8.8 | Bolt M20x45 |
| 164 | GB/T901-2000-M36x200-8.8 | Bolt M 36×200 |
| 165 | GB/T6170-2000-M36-8 | Nut M36 |
| 166 | GB/T5783-2000-M24x50-8.8 | Bolt M 24×50 |
| 167 | GB/T5783-2000-M12x35-8.8 | Bolt M 12×35 |
| 168 | CTAC-G3 | C type air cleaner G3′ |
| 169 | GB/T5783-2000-M6x8-8.8 | Bolt M 6×8 |
| 170 | GB117-88-30X130 | Pin 30×130 |
| 171 | GB/T5783-2000-M10x20-8.8 | Bolt M 10×20 |
| 172 | GB/T5783-2000-M30X145-8.8 | Bolt M 30×145 |
| 173 | GB/T41-2000-M30-8 | Nut M30 |
| 174 | GB/T5783-2000-M20x45-8 | Bolt M20x45 |
| 175 | GB/T901-2000-M36x200-8.8 | Screw M 36×200 |
| 176 | GB/T6170-2000-M36-8 | Nut M36 |
| 177 | GB/T5783-2000-M24x50-8.8 | Bolt M 24×50 |
| 178 | GB/T5783-2000-M12x35-8.8 | Bolt M 12×35 |
| 179 | CTAC-G3 | C-type air cleaner G3′ |
| 180 | GB/T5783-2000-M6x8 | Bolt M6x8 |
| 181 | GB117-88-30X130 | Pin Փ 30×130 |
| 182 | GB/T5783-2000-M10x20-8.8 | Bolt M 10×20 |
| 183 | JC50DB01-04.05.00 | Pipe clamp assembly |
| 184 | JB1885-77-16I | Rubber tube 16I |
| 185 | GB1235-76-20×2.4 | O-ring 20×2.4 |
| 186 | GB93-87-30 | Grower washer 30 |
| 187 | SC-00 | Main Caliper Assembly |
| 188 | EC-00 | Emergency Caliper Assembly |
| 189 | F-0306 | Cap Screw |
| 190 | F-0307 | Washer |
| 191 | SG-00 | Cylinder Assembly, Service |
| 192 | SC-03 | Spring, Caliper Return |
| 193 | SC-18 | Spacer |
| 194 | SC-19 | Pin, Service Support |
| 195 | SC-12 | Pin, Finger Loop Cotter |
| 196 | SC-02 | Pin, Cylinder |
| 197 | T-02 | Cap Screw |
| 198 | SC-07 | Plate, Pivot Pin Retainer |
| 199 | SC-08 | Pin, Caliper Pivot |
| 200 | SC-10 | Pin, Brake Pad |
| 201 | T-03 | Washer |
| 202 | T-09 | Long Bolt of Brake Block |
| 203 | SC-16 | Bolt of Brake Block |
| 204 | SC-14 | Plate Assembly, Brake Pad |
| 205 | SC-11 | Bearing |
| 206 | SC-20 | Pad Assembly |
| 207 | SC-06 | Bearing |
| 208 | AF80 | AF Rod Wiper |
| 209 | SC-17 | Support Muff |
| 210 | T-04 | Grease |
| 211 | A530 | A5 Rod Wiper |
| 212 | T-04 | Grease |
| 213 | A530 | A5 Rod Wiper |
| 214 | SC-01 | Bearing |
| 215 | T-08 | Bolt of Cover Plate |
| 216 | T-07 | Cover Plate |
| 217 | SC-05 | Bearing |
| 218 | SC-09 | Bearing |
| 219 | SC-13 | Bearing |
| 220 | EG-00 | Emergency Cylinder |
| 221 | SC-06 | Bearing |
| 222 | EC-01 | Pin, Cylinder |
| 223 | SC-08 | Pin, Caliper Pivot |
| 224 | SC-12 | Pin, Finger Loop Cotter |
| 225 | SC-10 | Pin, Brake Pad |
| 226 | T-09 | Long Bolt of Brake Block |
| 227 | SC-14 | Plate Assembly, Brake Pad |
| 228 | T-03 | Washer |
| 229 | SC-16 | Bolt of Brake Block |
| 230 | SC-11 | Bearing |
| 231 | SC-20 | Pad Assembly |
| 232 | T-02 | Cap Screw |
| 233 | SC-07 | Plate, Pivot Pin Retainer |
| 234 | SC-17 | Support Muff |
| 235 | AF80 | AF Rod Wiper |
| 236 | T-04 | Grease |
| 237 | A530 | A5 Rod Wiper |
| 238 | T-04 | Grease |
| 239 | A530 | A5 Rod Wiper |
| 240 | SC-01 | Bearing |
| 241 | T-08 | Bolt of Cover Plate |
| 242 | T-07 | Cover Plate |
| 243 | SC-05 | Bearing |
| 244 | SC-09 | Bearing |
| 245 | SC-13 | Bearing |
Field Failure Repair Case Studies
Case 1: Gearbox Bearing Wear Causing Excessive Vibration
A JC-70DB drawworks suffered severe vibration and noise due to a worn SKF 22336CC/W33 gearbox bearing. Installing the OEM replacement bearing and re-aligning the shaft eliminated vibration, restored smooth gear rotation, and prevented catastrophic gearbox damage.
Case 2: Air Control System Air Leakage
Unresponsive drawworks actuation stemmed from leaking quick release valves and degraded rubber hoses in the air control system. Replacing OEM valves, hose connectors, and O-rings restored air pressure, fixing actuation delays and resuming normal lifting operations.
Case 3: Brake Caliper Pad & Bearing Failure
Reduced brake stopping power occurred due to worn brake pads and caliper bearings on the main service caliper assembly. Swapping in OEM brake pad assemblies and replacement bearings restored full braking capacity, ensuring safe drill string control.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts exclusively designed for the JC-70DB drawworks? | Yes, this catalog features OEM parts engineered solely for the JC-70DB 70-ton electric drawworks, matching original drawing references and part numbers for perfect drop-in fitment. |
| Do the bearings meet API 7K heavy-duty drilling standards? | Absolutely, all SKF bearings and high-load components comply with API 7K standards, built to handle the JC-70DB’s 70-ton lifting capacity and harsh drilling loads. |
| Can these seals be used for both air and lubrication systems? | Yes, the OEM O-rings and oil seals are formulated for compatibility with pneumatic air, cooling water, and lubricating oil systems, ensuring universal sealing performance. |
Procurement Guidance
This JC-70DB drawworks spare parts catalog serves as both a formal oilfield procurement benchmark and a hands-on technical troubleshooting reference, designed to eliminate the risks of substandard aftermarket parts that fail prematurely, reduce long-term drawworks maintenance expenses, and uphold the safety and operational reliability of your drill string lifting system. Every part is a verified OEM-certified component that guarantees perfect fitment, consistent heavy-load performance, and full compliance with API, ISO, and original JC-70DB manufacturing standards, making it the definitive resource for maintaining 70-ton JC-70DB drawworks.
