DQ-70 & DQ-70BS Top Drive Components List

1. Product Introduction

This document provides a comprehensive components list for DQ-70 and DQ-70BS top drive systems, specifically tailored for drilling rigs with Drill Nos. 110, 236, 253, 259, 264 (for DQ-70) and 260, 265, 283 (for DQ-70BS). These top drives are core equipment in onshore and offshore oil and gas drilling operations, responsible for rotating drill strings, transmitting drilling torque, and ensuring efficient drilling progress. The target users include on-site drilling maintenance technicians, procurement managers of oilfield service companies, top drive operation supervisors, and technical engineers, who have clear segmented needs: for DQ-70 users, reliable electrical, mechanical, and control components to support standard drilling operations; for DQ-70BS users, explosion-proof, high-performance components compatible with harsh and hazardous drilling environments. The core purpose of this list is to provide a one-stop procurement and technical reference solution, ensuring every component 100% matches the original DQ-70/DQ-70BS top drive specifications. It directly addresses the pain points of mismatched components causing top drive downtime (average 8+ hours per failure), reduced drilling efficiency, equipment damage, and potential safety hazards (especially explosion risks for DQ-70BS in hazardous areas), helping users cut unplanned maintenance costs by 42% on average and maximize the continuous operation of drilling rigs.

2. Functional Instructions

Every component in the DQ-70 and DQ-70BS top drive components list has a targeted function, working synergistically to ensure the stable, efficient, and safe operation of the top drive system during drilling. Below is a detailed breakdown of core functions by component category:

3. Structural Characteristics

All DQ-70 and DQ-70BS components use high-quality materials that meet industrial standards and withstand harsh drilling environments: Power components (main engines, bearings) are made of AISI 4130 alloy steel,经过 quenching and tempering treatment to achieve a hardness of HRC 58-63 and a tensile strength of ≥1200 MPa. DQ-70BS explosion-proof components (engines, solenoid valves, cables) use aluminum alloy (ADC12) and flame-retardant engineering plastic (PA66+GF30), meeting Ex d IIB T3 Gb explosion-proof standard and IP66 protection grade. Seals use nitrile (NBR 70/90 Duro) and fluororubber materials—NBR seals have an elongation at break of ≥300% and a tensile strength of ≥14 MPa, while fluororubber seals offer excellent high-temperature and corrosion resistance. Electrical components (relays, contactors, fuses) use copper and flame-retardant plastic, with a voltage rating of up to 690V and current capacity up to 1250A. All components undergo strict non-destructive testing (ultrasonic, magnetic particle, and liquid penetrant testing) and explosion-proof testing (for DQ-70BS), with a defect detection rate of 100% and a finished product qualification rate of 100%.

4. Applicable Working Conditions

The DQ-70 and DQ-70BS top drive components are engineered for the harsh working conditions of onshore and offshore oil and gas drilling operations, with specific applicability tailored to each model:

5. Maintenance and Maintenance Suggestions

To extend the service life of DQ-70 and DQ-70BS top drive components and ensure the safe, stable operation of the top drive system, the following practical maintenance suggestions are provided (based on OEM guidelines and on-site drilling experience):

1. Regular Inspection: Conduct a comprehensive inspection of DQ-70 components every 250 working hours, and DQ-70BS components every 200 working hours (due to harsh hazardous environments). Focus on checking bearing lubrication (replenish lubricating oil when oil level is below the standard line), seal integrity (replace when cracks, deformation, or leakage is found), explosion-proof components (check for seal damage and explosion-proof performance), and electrical connections (check for loose or corroded contacts).
2. Cleaning and Lubrication: After each drilling shift, clean the top drive’s external components with neutral detergent to remove drilling mud, dust, and debris. Apply special high-temperature lubricating grease (lithium-based grease, NLGI Grade 2) to pins, bearings, and gear surfaces to reduce friction. For DQ-70BS explosion-proof components, use explosion-proof cleaning agents to avoid damaging the explosion-proof seal. Replace gear oil every 2500 working hours for DQ-70 and 2000 working hours for DQ-70BS.
3. Replacement Standard: Bearings (222 P3GP3, 222E NSK) should be replaced after 8000 working hours (DQ-70) and 7000 working hours (DQ-70BS); seals and gaskets should be replaced every 500-600 working hours (or earlier if leakage occurs); explosion-proof components (solenoid valves, engines) should be inspected annually and replaced if explosion-proof performance is compromised; electrical components (relays, contactors, fuses) should be replaced after 3000 working hours (or when malfunction occurs). Use OEM components for replacement to ensure compatibility and safety.
4. Storage Requirements: Unused components should be stored in a dry, ventilated warehouse with a relative humidity of ≤55%, avoiding direct contact with water, oil, drilling mud, and corrosive substances. DQ-70BS explosion-proof components should be stored in a dedicated explosion-proof storage cabinet, avoiding collision and damage to the explosion-proof seal. Seals, rubber components, and electrical components should be stored in a cool environment (temperature 0-22℃) to avoid aging, hardening, or damage.

We supply the following spare parts:

DQ-70 Top Drive Components (Drill No. 110, 236, 253, 259, 264)
1	Main engine “A” 315 kW	W0201315500A	set
2	Main engine “B” 315 kW	W0201315500B	set
3	Upper electric motor bearing	222 P3GP3 (ball)	pcs.
4	Lower electric motor bearing	222E NSK (roller) (SKF 2224 EC)	pcs.
5	Seal	180x210x15	pcs.
6	Electric motor oil seal	2.2-120x146x12	pcs.
7	Electric motor oil seal	CR-41185-USA	pcs.
8	Fan motor	W02025.52	pcs.
9	Driller’s console (with screen)	900x300x600	set
10	Frequency conversion unit	ACS800-04M-0610-7+D150+P901	set
11	Power cable	313MSM	set
12	Auxiliary power cable	5×2.5+6×4+3×6 mm²	set
13	Control cable	60×1 mm²	set
14	Control cable / Communication cable for the driller’s console	15 lived	set
15	Connecting cable between power supply and transformer	25 m	pcs.
16	Breaker	C65N 3P D20A	pcs.
17	Breaker	C65N 3P D6A	pcs.
18	Breaker	C65N 1P C20A	pcs.
19	Breaker	C65N 1P C10A	pcs.
20	Breaker	C65N 2P C20A	pcs.
21	Breaker	C65N 2P C10A	pcs.
22	Intermediate relay	RSB2A080BD	pcs.
23	Intermediate relay socket	RSZE1S48M	pcs.
24	Protective relay block	RZM031BN	pcs.
25	Relay protective clamp	RSZR215	pcs.
26	Button (red)	XB2BA41C	pcs.
27	Round head button	XB2BS542C	pcs.
28	Three-position self-locking handle	XB2BD33C	pcs.
29	Three-position handle with self-return	XB2BD53c	pcs.
30	Three-position self-healing handle	XB2BD83C	pcs.
31	Two-position self-locking handle	XB2BD21C	pcs.
32	Indicator	XB2-BVB3LC 24V green	pcs.
33	Indicator	XB2-BVB4LC 24V red	pcs.
34	Potentiometer with knob	WXJ-5-22 3.3K	pcs.
35	Auxiliary contact	ZB2BE101/102	pcs.
36	Potentiometer for torque limiting	WX501-2-223.3K	pcs.
37	Two-position self-healing handle	WX2BD45c	pcs.
38	Button	XB2BA31C	pcs.
39	DP connectors	6ES7-972	pcs.
40	Cable	3×2.5 mm²	m.
41	Lubrication pressure switch	J120-191	pcs.
42	Wind pressure switch	1950-0-2F	pcs.
43	Coder	DC01011250	pcs.
44	Power Supply Board APOW-01C	64605666; B 3180657 EE	pcs.
45	Interface block	ET200M	set
46	Liquid level float switch	YW01150	pcs.
47	Oil temperature sensor	PT-100	pcs.
48	Oil flow sensor	SIKA CHS20M01181I41/	pcs.
49	Fuse	3NE3 337-9; VDE 0636; IEC/EN 60269; SITOR 1000 A; 900 Va.c.; 50 kA	pcs.
50	Fuse	3NE3 337-9; VDE 0636; IEC/EN 60269; SITOR 900 A; 900 Va.c.; 50 kA	pcs.
51	Fuse	3NE3 337-9; VDE 0636; IEC/EN 60269; SITOR 710 A; 900 Va.c.; 50 kA	pcs.
52	Transistor for inverter	IGBT 6MB1450U-170/AGDR-72C	pcs.
53	Transistor board	AGDR-72C	pcs.
54	Hybrid power starter	NRED-61-F	pcs.
55	Power contactor	ABB AF 460-30	pcs.
56	Automatic circuit breaker	MT12 N2; 1250A; GB 14048.2	pcs.
57	Automatic circuit breaker	NSH 160N; 125A	pcs.
58	Magnetic starter	LC1 D12…C	pcs.
59	Inverter submodule	TYPE: AIMT-02C	pcs.
60	Rectifier block	Powerblok 1P 6SL3353-1AG41-8DA1	pcs.
61	Inverter	SIEMENS Powerblock 1p 6SL 3352 1AG41 OFA1; ZYDO2367990019	set
62	Encoder	MODEL-M6; OPTION CODE-4S1HX51ZTZ00; SER.NO.-6525; REV-W; PPR-1024; YDC-5-24; mA-100.	set
	DQ-70BS Top Drive Components (Drill Nos. 260, 265, 283)
63	Main Engine “A”	9702011000	set
64	Main engine “B”	9702011000	set
65	Cooling fan	3101030170	set
66	Power cable	9704019300	set
67	Explosion-proof output cable from the driller’s console torque (X102)	9704029301	set
68	Explosion-proof hydraulic power supply cable	9704059104	set
69	Explosion-proof cable with digital signal of hydraulic source (X101)	9704059204	set
70	Explosion-proof cable with analog signal of hydraulic source (X102)	9704059304	set
71	Explosion-proof cable with manual	9704029104	set
72	Explosion-proof control cable for the driller’s console (X101)	9704029204	set
73	Explosion-proof communication cable for the driller’s console (X200)	9704029404	set
74	Explosion-proof engine	3101030310	pcs.
75	Explosion-proof engine	3101030320	pcs.
76	Power cable	YCW 450/750 1×185	m.
77	Power cable	YCW 450/750 1×240	m.
78	Power cable	YCW 1×271 mm; 2000V	m.
79	Tip	185 mm	pcs.
80	Tip	240 mm	pcs.
81	Tip	271 mm	pcs.
82	CPU power supply and CPU 315-2DP	Siemens S7-300	set
83	Interface plug	PROFIBUS	pcs.
84	Block module	SIMATIC ET200M IM 153-1 153-1AA03-0XB0	pcs.
85	Block module	SIMATIC S7; IP 6ES7 321-1BL00-0AA0	pcs.
86	Block module	SIMATIC S7 Ip 6ES7 322-1BL00-0AA0 S C-RND21992	pcs.
87	Block module	SIMATIC S7 Ip 6ES7 331-7KF02-0AB0 S C-ROM35375	pcs.
88	Block module	SIMATIC S7 Ip 6ES7 338-4BC01-0AB0 S C-D6TG3829	pcs.
89	Connector module	ET200pro	pcs.
90	Fiber optic line module	OLM	pcs.
91	Repeater	RPT1 REPEATER	pcs.
92	Control module	CU320-2DP	pcs.
93	Operating panel	AOR30	pcs.
94	Siemens Hub Module	DMC20	pcs.
95	Main Power Input Module	LSM	pcs.
96	Current source module	BLM	pcs.
97	Electric motor module 1, 2	MoM1, MoM2	pcs.
98	Brake module	3110000200	pcs.
99	Temperature sensor	3403000140	pcs.
100	Pressure sensor	3808000120	pcs.
101	Lock detector	3301010038	pcs.
102	Explosion-proof solenoid valve (type C)	5216000670	pcs.
103	Explosion-proof solenoid valve (Y type)	5126000562	pcs.
104	Explosion-proof electromagnetic switching valve (type J)	5126000560	pcs.
105	Explosion-proof electromagnetic blocking valve of accumulator type	5126000540	pcs.
106	Fuse	3301011490	pcs.
107	Fuse	3399100870	pcs.
108	Fuse	3408030181	pcs.
109	Fuse	3408030140	pcs.
110	Relay	3304010470	pcs.
111	Relay	3304010460	pcs.
112	Relay	3304010450	pcs.
113	Relay	3304000400	pcs.
114	Time relay	3304010490	pcs.
115	Electromagnetic starter	3TF51; IEC 60947; UK-380V; GB 14048; VDE 0660; 160A; 690V~	pcs.
116	Electromagnetic starter	LC-1; D80 11; Uk-110V	pcs.
117	Electromagnetic starter	LS1-D32…C; 50A; UK-380V; GB/T14048.1	pcs.
118	Automatic circuit breaker	SACE T6N 800; IEC/EN 60947-2 GB 14048.2	pcs.
119	Automatic circuit breaker	NS250H Ui 750V; IEC/EN 60947-2	pcs.
120	Automatic circuit breaker	HSM1=160H; GB14048.2-94	pcs.
121	Single-contact lamps.	YS40RR	pcs.
122	Mercury lamps.	DRL-400 with E-40 socket (or equivalent)	pcs.
123	Metal halide lamps.	JLZ400 KN U4K-PS (DRI E-40 400Ве)	pcs.
124	Pulse ignition device (PID)	TRIDONIC. ATCO; Ignitor ZRM 4.5-ES/C 220-240V; 50-60 Hz (or equivalent)	pcs.
125	Throttle	LN400F2LP 400W SON 4.6A LAMP tw 140 Hz (or equivalent)	pcs.

6. On-Site Fault Maintenance Cases

Case 1: DQ-70 Top Drive Speed Fluctuation Caused by Frequency Conversion Unit Malfunction

Scenario: A DQ-70 top drive on Drill No. 236 experienced frequent speed fluctuations (0-150 rpm) during drilling, leading to unstable drilling efficiency. Inspection found that the IGBT transistor (6MB1450U-170) on the frequency conversion unit (ACS800-04M-0610-7) was damaged due to overheating, causing abnormal power output.

Solution: Replace the damaged IGBT transistor and matching transistor board (AGDR-72C) with new OEM components, clean the frequency conversion unit’s heat sink to improve heat dissipation, and adjust the cooling fan (W02025.52) to ensure normal operation. After maintenance, the top drive speed remained stable (±1 rpm), and drilling efficiency returned to normal.

Case 2: DQ-70BS Top Drive Hydraulic Leakage Caused by Explosion-Proof Solenoid Valve Damage

Scenario: A DQ-70BS top drive on Drill No. 260 experienced hydraulic fluid leakage from the solenoid valve area during operation in a hazardous drilling site. Inspection found that the explosion-proof solenoid valve (5216000670 C-type) was worn, and the explosion-proof seal was damaged, leading to both hydraulic leakage and potential explosion risks.

Solution: Replace the damaged 5216000670 solenoid valve with a new OEM explosion-proof component, check and replace the damaged explosion-proof seal, and test the explosion-proof performance (meeting Ex d IIB T3 Gb standard). After maintenance, the hydraulic leakage was completely eliminated, and the explosion-proof performance was verified, ensuring safe operation in the hazardous area.

Case 3: DQ-70 Top Drive Control Failure Caused by Intermediate Relay Malfunction

Scenario: A DQ-70 top drive on Drill No. 259 failed to respond to control commands from the driller’s console, leading to drilling downtime. Inspection found that the intermediate relay (RSB2A080BD) was malfunctioning, unable to transmit control signals between the console and the top drive’s electrical system.

Solution: Replace the malfunctioning RSB2A080BD intermediate relay and its socket (RSZE1S48M) with new OEM components, check the electrical connections to ensure stable signal transmission, and test the control system’s response. After replacement, the top drive resumed normal operation, and the control response time was restored to ≤0.05 seconds.

7. FAQ (Frequently Asked Questions)

No.	Questions	Answers
1	Are these OEM components fully compatible with DQ-70 (Drill No. 110,236,253,259,264) and DQ-70BS (Drill No. 260,265,283) top drives?	Yes, all components in this list are manufactured strictly according to DQ-70 and DQ-70BS OEM specifications, with 100% compatibility with the corresponding top drive systems and drilling rig numbers. Each component is designed to match the top drive’s mechanical, hydraulic, and electrical systems, ensuring seamless installation and stable performance. We strictly follow API 7K, API 8C, IEC 60947, and ISO 9001 standards, and DQ-70BS explosion-proof components meet Ex d IIB T3 Gb standard, eliminating the risk of mismatched components and equipment damage.
2	What is the key difference between DQ-70 and DQ-70BS top drive components, and can they be used interchangeably?	The key difference is that DQ-70BS components are designed for hazardous drilling environments, featuring explosion-proof performance (Ex d IIB T3 Gb) and corrosion resistance, while DQ-70 components are for standard drilling environments. For example, DQ-70BS uses explosion-proof solenoid valves (5216000670) and engines (3101030310), while DQ-70 uses standard electrical components. They cannot be used interchangeably—using DQ-70 components on DQ-70BS will violate explosion-proof safety standards, and using DQ-70BS components on DQ-70 will increase unnecessary costs without additional benefits. Always select components based on the top drive model and drilling rig number.
3	How to quickly confirm the correct component model/part number when purchasing DQ-70/DQ-70BS parts for emergency drilling maintenance?	You can use three simple methods to confirm: 1) Check the original DQ-70/DQ-70BS top drive maintenance manual, which records the detailed model/part number of each component corresponding to the drilling rig number; 2) Remove the old component and check the model/part number marked on its surface (all OEM components have clear, permanent marking); 3) Provide the top drive model (DQ-70/DQ-70BS), drilling rig number, and the name of the damaged component (e.g., main engine, explosion-proof solenoid valve, frequency conversion unit) to our technical team, and we will accurately match the corresponding model/part number. This list covers 125 common components, meeting most emergency maintenance needs during drilling operations.

8. Procurement Guide & Technical Reference

All DQ-70 and DQ-70BS components in this list meet the following authoritative industry standards, ensuring product quality, reliability, and compliance with oilfield drilling operation requirements: