ZQ127-25-Operation-Manual-EnglishModel ZQ127-25 Drill Pipe Tong is mouth-opening type power tong used for make up and break out 2
3/8″-3 1/2″ drill pipe, 2 3/8″-4 1/2″ tubing and 4 1/2″-5 1/2″ casing in the oil field well workover operation.
ZQ127/25 Drill Pipe Power Tong | API 7K Hydraulic Power Tong Ex-Stock
Description
Technical Resources:
PDF Download: ZQ127/25 Operation Manual
CAMTOP (Shanghai) Machinery Equipment Co., Ltd.
CAMTOP · Oilfield Equipment Division
www.cposl.com
Product Datasheet & Technical Guide
ZQ127/25 Drill Pipe
ZQ127/25 Drill Pipe
Power Tong
A hydraulic, mouth-opening power tong engineered for reliable make-up and break-out of drill pipe, tubing and casing in oilfield well-workover operations — from 2 3/8″ to 5 1/2″.
25
KN·m
Low-Gear Torque
16
MPa
Rated Hydraulic Pressure
120
L/min
Oil Supply Flow
43
RPM
High-Gear Speed
680
kg
Total Weight
Product Overview
What the ZQ127/25 does — and why it matters on the rig floor
Drill Pipe Make-Up & Break-Out
Handles standard API drill pipe connections with consistent, repeatable torque delivery across all string sizes.
2 3/8″ – 3 1/2″ DPTubing Connections
Multi-die-seat system adapts to a wide range of tubing ODs. Fast die changeover minimises rig NPT.
2 3/8″ – 4 1/2″ TubingCasing Running
Low-gear planetary drive delivers up to 25 KN·m — enough torque for premium casing connections.
4 1/2″ – 5 1/2″ CasingIntegrated Safety Interlock
Flexible-shaft reversing valve immediately halts hydraulic flow whenever the safety door opens.
Linkage ProtectionTechnical Specifications
All performance data per the factory operation manual (Rev. 2017-05)
Hydraulic Performance
| Rated Oil Supply Pressure | 16 MPa |
| Rated Oil Supply Flow | 120 L/min |
| Hydraulic Oil Temperature (max) | 65 °C |
| Recommended Oil Grade | YC-N46 / YB-N46 / YA-N46 |
| Hydraulic Motor Model | J6K-625 |
Drive System & Torque
| Drive Type | Planetary Gear |
| Number of Gears | 2 (High / Low) |
| High-Gear Rated Torque | 5.1 KN·m |
| Low-Gear Rated Torque | 25 KN·m |
| High-Gear Rotation Speed | 43 RPM |
| Low-Gear Rotation Speed | 8 RPM |
Physical Dimensions
| Tong Type | Mouth-Opening |
| Overall Dimensions (L×W×H) | 1270 × 770 × 780 mm |
| Overall Weight | 680 kg |
| Lifting Point Height | ~15 m above wellhead |
| Tong Head Standoff | 0.5 m from wellhead centre |
| Back-Guy Load Capacity | ≥ 50 KN |
Application Range
| Drill Pipe | 2 3/8″ – 3 1/2″ |
| Tubing | 2 3/8″ – 4 1/2″ |
| Casing | 4 1/2″ – 5 1/2″ |
| Tong Head Type | Open-face / 8-position Die Seat |
| Die Sets Included | Type 1, 2, 3 (73–156 mm OD) |
| Operation | Workover & Completion |
Die Seat & Die Selection Guide
Match the correct die seat and die to the pipe OD — incorrect selection is the #1 cause of jaw slip
| Part No. | Die Seat | Application Range | Steel Mark |
|---|---|---|---|
| ZQ25.1.1-7(1) | Die Seat (1) | 2 3/8″ drill pipe, 3 1/2″ tubing | 3 1/2″ |
| ZQ25.1.1-7(2) | Die Seat (2) | 2 7/8″ drill pipe, 4″ tubing | 4″ |
| ZQ25.1.1-7(3) | Die Seat (3) | 4 1/2″ tubing, 3 1/2″ tubing coupling, 4 1/2″ casing | 4 1/2″ |
| ZQ25.1.1-7(4) | Die Seat (4) | 3 1/2″ drill pipe, 4″ tubing coupling, 5″ casing, 4 1/2″ casing coupling | 5″ |
| ZQ25.1.1-7(5) | Die Seat (5) | 4 1/2″ tubing coupling, 5 1/2″ casing, 5″ casing coupling | 5 1/2″ |
| ZQ25.1.1-7(6) | Die Seat (6) | 5 1/2″ casing coupling | 6 1/8″ |
| ZQ25.1.1-7(7) | Die Seat (7) | 2 7/8″ tubing | 2 7/8″ |
| ZQ25.1.1-7(8) | Die Seat (8) | 2 3/8″ tubing | 2 3/8″ |
| Part No. | Die Type | Applicable Pipe OD (mm) | Application |
|---|---|---|---|
| XYQ12.Z-01.12(1) | Die (1) | 73 – 78 mm | 2 3/8″–4 1/2″ tubing |
| XYQ12.Z-01.12(2) | Die (2) | 89 – 114 mm | 2 3/8″–3 1/2″ drill pipe, 3 1/2″–4 1/2″ tubing, 4 1/2″ casing |
| XYQ12.Z-01.12(3) | Die (3) | 121 – 156 mm | 3 1/2″ drill pipe, 4″–4 1/2″ tubing coupling, 5″–5 1/2″ casing |
Installation & Operation Sequence
Follow this sequence for safe and efficient rig-up
1
Lift & Position
Attach the hydraulic lifting bucket to the master-tong lifting bar. Hoist to approximately 15 m above wellhead. In free-suspension state, tong head centre must sit 0.5 m from wellhead centre.
2
Level the Tong
Adjust the levelling screws on the lifting bar until the tong body is horizontal. A non-level tong prevents the dies from gripping properly and will cause jaw slip.
3
Rig the Back-Guy
Tie the back-guy line from the rig structure to the back guide-pole seat. The back-guy must be rated for ≥ 50 KN and oriented perpendicular to the drill pipe during make-up operations.
4
Select & Install Die Seat / Die
Choose the correct die seat and die using the steel-mark colour code (see Die Selection table). Secure with set screws and screw stop pins.
5
Adjust Suspended Height
Lift: Close throttle valve → Open stop valve. Drop: Open throttle valve → Open stop valve. Lock: Close stop valve at target height, then open throttle valve to resume operation.
6
Install & Debug Safety Interlock
Mount the flexible-shaft reversing valve at the hydraulic inlet/outlet. Close the safety door and push up the valve core (~8.5 mm travel). Connect the hydraulic station and run idle to verify the interlock cuts power upon door opening.
7
Make-Up / Break-Out
Close the safety door. Use the hand-control valve to select direction. For break-out, move the guide-pole pin axle to the lowest hole before applying torque.
Safety System Architecture
Three-layer protection built into every ZQ127/25 unit
✅ Safety Door Interlock
The flexible-shaft controlled reversing valve (Model RHF.0) provides immediate hydraulic cutoff the instant the safety door is opened. Power cannot resume until the door is fully closed and locked.
✅ Back-Guy Restraint
A certified 50 KN back-guy line prevents the tong assembly from rotating with the string. The line must remain perpendicular to the pipe axis during all make-up operations.
⚠ Tong Centring Requirement
The tong head centreline must align with the pipe centreline before energising. Misalignment loads the planetary gear eccentrically, accelerating wear and potentially causing sudden gear failure.
⚠ Over-Pressure / Over-Torque
Never exceed rated hydraulic pressure (16 MPa) or rated torque (25 KN·m on low gear). Over-torque conditions overload the planetary carrier and can crack the ring gear housing.
🚫 Hydraulic Oil Temperature
If oil temperature rises above 65 °C, seal degradation accelerates. Shut down and allow the system to cool. Replace oil if discolouration or contamination is observed.
🚫 Maintenance Lockout
Always isolate the hydraulic source and move the tong clear of the wellhead before changing dies, replacing seals, or performing any mechanical maintenance on the tong head assembly.
Maintenance & Lubrication Schedule
Proactive maintenance is the most cost-effective way to protect the planetary drive
Pre-Job Fastener Check
Inspect and torque all external cap screws before every well. Vibration during operations progressively loosens connections.
Pre-Job Lubrication
Inject lubricating grease into every transmission point (idler shafts, duplex gear shaft, centralizing rollers) before starting operations.
Post-Job Clean-Down
Remove all water and oil stains from the tong body immediately after each use to prevent corrosion of the gear housing.
Post-Well Diesel Flush & Re-Lube
After completing each well, wash all moving parts with diesel fuel, then re-apply grease to all transmission components.
Hydraulic Oil Monitoring
Monitor oil temperature continuously. Keep below 65 °C. Replace oil on schedule or whenever contamination is detected. Do not use steam cleaning — it strips grease from sealed bearings.
Hydraulic Oil Selection
YC-N46 (−20 °C to +40 °C): cold-climate operations.
YB-N46 (−10 °C to +40 °C): wear-resistant, standard desert.
YA-N46 (0 °C to +40 °C): temperate conditions.
Common Faults & Remediation
Quick-reference diagnostic table for rig-floor use
| Symptom | Root Cause | Corrective Action | Severity |
|---|---|---|---|
| Tong dies slip on pipe | Die groove packed with cuttings / debris | Clean the die groove; remove all foreign material | ⚠ Moderate |
| Tong dies slip on pipe | Dies excessively worn | Replace dies with genuine CAMTOP spare parts | ⚠ Moderate |
| Tong dies slip on pipe | Tong body not level (master or backup) | Re-level both master and backup tong using the levelling screws | ⚠ Moderate |
| Master/backup head openings misaligned | Retaining pin not seated by reset knob | Turn the reset knob and re-index the tong head | ✅ Minor |
| Master grips; backup slips | Backup jaw-plate frame rotation opposite to master | Swap positions of the two backup-tong hydraulic hoses (A ↔ B) | ⚠ Moderate |
| Power tong runs slowly after safety-door closure | Flexible-shaft valve core not fully adjusted | Re-adjust valve core height to ~8.5 mm; tighten lock nut | ✅ Minor |
| Tong runs in reverse when door is closed | Oil ports A and B connected incorrectly | Swap hose connections at ports A and B on the reversing valve | ⚠ Moderate |
Frequently Asked Questions
Answers to the most searched questions about the ZQ127/25
What is the maximum torque of the ZQ127/25 drill pipe power tong?
The ZQ127/25 delivers a rated maximum torque of 25 KN·m on the low gear and 5.1 KN·m on the high gear, powered by a 16 MPa hydraulic supply at 120 L/min.
What pipe sizes does the ZQ127/25 power tong handle?
The tong covers 2 3/8″–3 1/2″ drill pipe, 2 3/8″–4 1/2″ tubing, and 4 1/2″–5 1/2″ casing. Correct pipe coverage is achieved by selecting the appropriate die seat (8 options) and die set (3 size ranges: 73–78 mm, 89–114 mm, 121–156 mm).
How does the safety interlock system work on the ZQ127/25?
A push-pull flexible shaft mechanically links the safety door to a hydraulic reversing valve (RHF.0) located at the oil inlet. Opening the safety door pushes the valve core, instantly blocking hydraulic flow and stopping the tong. The tong can only run when the door is fully closed, providing fail-safe protection against rotary-part contact.
What hydraulic oil should I use in the ZQ127/25?
CAMTOP recommends YC-N46 low-freezing oil (−20 °C to +40 °C) for cold climates, YB-N46 wear-resistant oil (−10 °C to +40 °C) for standard oilfield conditions, and YA-N46 ordinary hydraulic oil (0 °C to +40 °C) for temperate environments. All grades are N46 viscosity class. Oil temperature must remain below 65 °C.
Why do the tong dies keep slipping on the pipe?
Die slip has three primary causes: (1) debris packed in the die groove — clean the groove; (2) worn dies — replace with genuine spare dies; (3) tong body not level — re-adjust the levelling screws on both master and backup tong until the assembly is horizontal. Using mismatched die seats (wrong steel mark) also causes slip.
How heavy is the ZQ127/25 combination tong assembly?
The complete combination tong assembly (master tong + backup tong + guide poles + hydraulic bucket) weighs approximately 680 kg with overall envelope dimensions of 1270 × 770 × 780 mm. Plan crane lift capacity accordingly; the lifting bucket connects to the master tong lifting bar.
Who manufactures the ZQ127/25 power tong and where are spare parts available?
The ZQ127/25 is supplied by CAMTOP (Shanghai) Machinery Equipment Co., Ltd., located at No. 432, Fute North Road, Pudong District, Shanghai, China. Genuine spare parts — including dies, die seats, O-rings, friction discs, and centralizing rollers — are available through CAMTOP. Contact: +86 21 58432768 | WhatsApp: +86 18621723891 | www.cposl.com.
Recommended Spare Parts Inventory
Keep these items on-site for zero-NPT maintenance
| # | Part No. | Description | Qty / Kit |
|---|---|---|---|
| 1 | ZQ25.1-3 | Centralizing Roller Shaft | 37 |
| 2 | XYQ12.Z-03 | Centralizing Roller | 37 |
| 3 | XYQ12.Z-01.12(1/2/3) | Die Set (all 3 sizes) | As required |
| 4 | ZQ25.1.8-2 | Friction Disc (brake) | 6 |
| 5 | GB1235 O-ring 63×5.7 | Idler / Duplex Gear O-ring | 16 |
| 6 | Roller Φ10×30 | Drive Gear Roller | 168 |
| 7 | GB1235 O-ring 45×3.1 | Backup Tong Cylinder O-ring | 8 |
| 8 | GB1235 O-ring 22×2.4 | Backup Tong Piston O-ring | 8 |
| 9 | GB1235 O-ring 40×3.1 | Input Shaft O-ring | 2 |
| 10 | GB1235 O-ring 80×3.1 | Inner Gear Sleeve O-ring | 2 |
Get Technical Support or Request a Quote
Our engineering team can assist with die selection, spare-parts supply, field commissioning, and custom tong configurations.
Telephone
+86 21 58432768
Mobile / WhatsApp
+86 18621723891
Twitter
@Camtop589
Website
www.cposl.com
Address
No. 432, Fute North Road,
Pudong District, Shanghai, China
Pudong District, Shanghai, China
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