JC-70DB Drawworks Spare Parts

Product Introduction

This complete JC-70DB drawworks spare parts catalog covers all critical subsystems: air control systems, cooling water pipelines, lubrication systems, drum shaft assemblies, DS/ODS gearboxes, brake caliper assemblies, and fastening components. Each part is cross-referenced with original drawing numbers and part codes (JC70DB-series, AF-series, GB/T standard parts, SKF bearings), manufactured from high-strength alloy steel, wear-resistant rubber, and heat-treated metal to match original equipment load ratings and durability. Every component undergoes 100% load testing, pressure testing (up to 1.6x rated working pressure), and fatigue cycle validation to guarantee reliability in extreme oilfield environments. This catalog serves as a definitive sourcing and technical reference, eliminating part mismatching and streamlining procurement for both minor repairs and full drawworks overhauls.

Key Functional Specifications

• Hoisting Load Compatibility: Engineered to support the JC-70DB drawworks’ 7000-meter drilling hoisting capacity, with load-rated bearings and shafts handling up to 380kN radial load
• Sealing Performance: High-pressure oil seals, O-rings, and V-type weave seals provide zero-leakage sealing for lubrication and cooling systems, with temperature resistance from -40°C to 150°C
• Control System Stability: Air control components and pneumatic valves deliver 0.1s response time for emergency braking and speed regulation, meeting API 7K safety standards
• Fastener Durability: Heat-treated high-strength bolts (8.8/10.9 grade) resist vibration loosening, with a fatigue life of 15,000+ load cycles
• Lubrication System Efficiency: Oil filters, pressure gauges, and pipe clamps maintain stable oil pressure (0.8-1.6MPa) to reduce gear and bearing wear by 45%

Structural Design Features

• OEM-Matched Dimensional Accuracy: All parts follow original JC-70DB drawworks engineering drawings, requiring no modifications for installation
• Modular Subsystem Design: Separable gearbox, drum shaft, and brake components enable targeted part replacement without full drawworks disassembly
• Anti-Vibration & Anti-Loosening: Spring washers, lock nuts, and circlips prevent fastener disengagement under high-vibration hoisting operations
• Reinforced Wear Zones: Shaft sleeves, brake pads, and bearing seats feature hardened surfaces to extend wear life
• Standardized Interface Design: Compatible with original air-water couplings, sensors, and encoder devices for plug-and-play functionality

Applicable Operating Conditions

These JC-70DB drawworks spare parts are certified for use in extreme oilfield drilling environments, optimized for the following parameters:

• Onshore 7000-meter-class drilling rigs (desert, cold region, and plain drilling sites)
• Offshore drilling modules with JC-70DB drawworks configurations
• Operating ambient temperature: -40°C to 60°C; relative humidity: 5-95% non-condensing
• Continuous heavy-duty hoisting, braking, and gear shifting operations
• Compliant with API 7K, GB/T, and SKF international equipment standards

Maintenance & Troubleshooting Best Practices

• Routine Inspection (Every 1000 Drilling Hours): Check oil pressure, seal leaks, and fastener torque; retighten high-strength bolts to 180-220Nm rated torque
• Preventive Replacement (Every 5000 Drilling Hours): Replace oil seals, O-rings, and brake pads; change lubricating oil and replace oil filters
• Bearing & Shaft Care: Monitor bearing temperature (max 90°C threshold) and vibration; replace SKF precision bearings at the first sign of abnormal noise
• Air Control System Maintenance: Inspect pneumatic valves and hoses for leaks; clean air filters monthly to ensure unobstructed airflow
• Brake System Inspection: Check brake pad wear (replace at 3mm thickness threshold) and caliper cylinder performance biweekly
• 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 Fault Repair Cases (Real Drilling Site Scenarios)

Case 1: Drum Shaft Bearing Overheating & Hoisting Failure

Field Scenario: A 7000-meter land rig’s JC-70DB drawworks experienced sudden bearing overheating (exceeding 100°C) and hoisting shutdown mid-operation.

Root Cause: Worn SKF 23148CA/W33 bearing (JC70DB drum shaft assembly) and failed oil seal caused lubrication loss and excessive friction.

Resolution: Replaced the faulty bearing and matching oil seal; replenished lubricating oil and re-aligned the drum shaft. Normal operating temperature was restored, and hoisting function resumed fully.

Case 2: Air Control System Valve Leakage & Brake Malfunction

Field Scenario: An offshore rig’s JC-70DB drawworks exhibited delayed emergency braking and air pressure loss, posing a safety hazard.

Root Cause: Faulty fast air release valve (FV-NPT1/2) and cracked pneumatic rubber hose caused air pressure leakage in the control system.

Resolution: Installed a new air release valve and replacement rubber hose; pressure-tested the air system. Braking response time returned to 0.1s, eliminating safety risks.

Case 3: Gearbox Oil Leakage & Lubrication Pressure Drop

Field Scenario: A desert rig’s JC-70DB ODS gearbox reported severe oil leakage and low lubrication pressure, risking gear wear.

Root Cause: Damaged O-ring seals (38.7×3.55mm) and loose flange bolts led to lubricant leakage and pressure loss.

Resolution: Replaced all worn O-rings, retorqued flange bolts, and replaced the oil filter. Lubrication pressure stabilized at 1.2MPa, and leakage was fully resolved.

Frequently Asked Questions (FAQ)

Question	Answer
Are these parts fully compatible with the original JC-70DB drawworks?	Yes, every spare part is manufactured to original OEM specifications and API 7K standards, with perfect dimensional matching for seamless installation.
What is the service life of key components like bearings and seals?	SKF precision bearings last 28,000+ drilling hours with proper lubrication; oil seals and brake pads have a service life of 5,000-8,000 drilling hours under normal use.
Can I source individual subsystem parts (e.g., gearbox, brake system) separately?	Absolutely, you can order any single part or custom subsystem kit from this list, with full quality assurance and part traceability for every component.

Procurement Guidance & Call to Action

For drilling rig maintenance teams, procurement specialists, and oilfield repair crews relying on the JC-70DB drawworks for critical hoisting operations, this verified spare parts list is your definitive sourcing and technical reference. Each part is labeled with its original part number, drawing reference, and subsystem location for hassle-free ordering, meeting strict API and international quality standards to ensure equipment safety and performance. Whether you need to stock critical spare parts for routine preventive maintenance, replace failed components during emergency repairs, or assemble a full drawworks overhaul kit, these high-quality, OEM-matched parts deliver the durability and reliability required for harsh oilfield conditions. Reference the detailed part numbers and subsystem classifications below to secure the exact components you need, and leverage the included maintenance guidelines to resolve on-site faults efficiently and maintain uninterrupted drilling operations.