Fleet
Pulling Unit ND-1 | 250 HP | Well Service Unit
- ZYT5330TXJ
- Truck-Mounted Workover Rig
- 675 kN Static Hook Load
- 3,200 m
- Guy-Line-Free
Overview
Pulling Unit ND-1
Pulling Unit ND-1 is a 250 HP truck-mounted workover and pulling unit (ZYT5330TXJ) designed for sucker-rod service operations to 3,200 metres. Self-propelled on a dedicated 8×4 workover chassis, ND-1 mobilises as a single load at road speeds up to 45 km/h — no convoy, no crane, no rig-up delay.
The unit features a 34-metre telescopic mast with hydraulic erection, guy-line-free operation using rotary-leg hydraulic outriggers, and a Cummins NTA855-C450 engine delivering 450 HP. Crown-o-matic anti-collision protection and pre-set outrigger tilt alarms provide built-in safety at the wellsite.
Enquire about Pulling Unit ND-1Key highlights
Depth
3,200 m with 2-7/8" EUE tubing
Hook Load
675 kN (75 short ton) static
Mobilisation
Single-load, self-propelled
Mast
34 m telescopic, guy-line-free
Engine
Cummins NTA855-C450 — 450 HP
Standards
BS EN certified, LEEA-inspected lifting gear
Technical data
Specifications
Full equipment specification for Pulling Unit ND-1, grouped by system. Select a section to expand it.
General16 items
Design Features / General
| Unit type | Truck-mounted workover / pulling unit |
|---|---|
| Model | ZYT5330TXJD |
| Rated hook load | 400 kN (~41 t) |
| Max static load | 675 kN (~69 t) |
| Draw works max pull | 120 kN (~12 t) |
| Mast clearance height | 23.5 m |
| Traveling system | 3 x 4 |
| Carrier drive type | 8 x 4 |
| Wireline diameter | φ22 mm |
| Max speed | 45 km/h |
Carrier
| Configuration | 10 x 8 |
|---|---|
| Drive type | 8 x 4 |
| Max load capacity | 42,000 kg (full unit) |
| Max climb gradient | 20% |
| Max speed | 45 km/h |
| Quantity | 1 set |
Mast & Travelling System19 items
Mast
| Model | JJ675/24-K |
|---|---|
| Max static hook load | 675 kN |
| Max working height | 24 m |
| Working angle | 5° |
| Quantity | 1 set |
Crown Block
| Model | TC70 |
|---|---|
| Sheave diameter | φ575 mm |
| Max load | 675 kN |
| Wireline diameter | φ22 mm |
| Sheaves | 4 (one for hydraulic hoist) |
| Quantity | 1 set |
Travelling Block
| Model | YG70 |
|---|---|
| Max load | 675 kN |
| Sheaves | 3 ea |
| Sheave rotation angle | 360° |
| Wireline diameter | φ22 mm |
Main Drum Wireline
| Diameter | 22 mm |
|---|---|
| Length | 170 m |
| Quantity | 1 |
Drawworks11 items
Draw Works - Single Drum
| Model | JC14 |
|---|---|
| Drum diameter | φ356 mm |
| Drum length | 912 mm |
| Brake rim size (dia x width) | φ970 x 260 mm |
| Clutch model | ATD-224H |
| Brake band angle | 345° |
| Quantity | 1 set |
Hydraulic Hoist
| Model | YC3 |
|---|---|
| Wireline diameter | 13 mm |
| Max pull | 30 kN |
| Quantity | 1 |
Power Train19 items
Diesel Engine
| Make / model | Cummins NTA855-C450 |
|---|---|
| Power | 450 HP |
| Rotating speed | 2,100 r/min |
| Configuration | Vertical, 6 cylinders |
| Quantity | 1 pc |
Transmission Box
| Make / model | Allison 4700 (USA) |
|---|---|
| Input power | 600 HP |
| Max input torque | 2,508 N·m |
| Gears | 7 forward, 1 reverse |
| Quantity | 1 pc |
Gear Box
| Model | JX70 |
|---|---|
| Max output torque | 7,000 N·m |
| Max input speed | 2,500 rpm |
| Gear ratio | 1.65 |
| Quantity | 1 set |
Transfer Box
| Model | FDX125B |
|---|---|
| Output torque | 12,500 N·m |
| Input speed | 2,500 rpm |
| Gear ratio | 1:1 |
Hydraulic, Pneumatic & Electrical10 items
Hydraulic System
| Tank capacity | 560 L |
|---|---|
| Pressure rated | 12 MPa |
| Hydraulic pump | PGP050A; displacement 160 L / 1,800 r/min; rated 14 MPa |
| Hydraulic valves | Manual multi-way DCV60/8-E2 (160) & DCV200/2-E2 (160); 2 ea |
| Quantity | 1 |
Air Control System
| Working pressure | 0.75 ~ 0.931 MPa |
|---|---|
| Air tank volume | 200 L |
| Quantity | 1 |
Electric System
| Type | 24 V DC (carrier indicator lights & engine start) |
|---|---|
| Quantity | 1 |
Dimensions & Operating Envelope8 items
| Workover depth | 3,200 m with 2-7/8" EUE tubing |
|---|---|
| Mast clearance height | 23.5 m |
| Mast working angle | 5° |
| Max load capacity (full unit) | 42,000 kg |
| Max climb gradient | 20% |
| Max road speed | 45 km/h |
| Mobilisation | Single load, self-propelled — no convoy or crane required |
| Stability | Guy-line-free; rotary-leg hydraulic outriggers with pre-set tilt alarms |
Certification & Documentation5 items
| Lifting gear | Inspected six-monthly by LEEA-registered third-party inspectors |
|---|---|
| Standards | BS EN 13414-1, BS EN 12385-1, BS EN 13889, BS EN 1492-1 |
| Component certification | OEM certificates of conformity |
| Safety systems | Crown-o-matic anti-collision protection; outrigger tilt alarms |
| Operating documentation | Unit-dedicated SOPs and pre-job checklists (Nova Drill Management System) |
Handling Tools8 items
| Manual tongs | 3/4", 7/8" and 1" — 2 ea each |
|---|---|
| Sucker-rod elevators | 3/4", 7/8" and 1" — 2 ea each |
| Sucker-rod cub transfers | 3/4", 7/8" and 1" — 2 ea each |
| Fishing sockets | 3/4", 7/8" and 1" — 2 ea each |
| Multi overshots | 3-1/2" and 2-7/8" — 2 ea each |
| Sucker-rod power tong | XQ29 — 1 ea |
| Hook swivel | 35 ton — 1 ea |
| Pipe wrenches | 24" and 36" — 1 ea each |
