“Goodeng Machine” GD450-LS successfully completes Project Baoding City Boye County Natural Gas Pipeline Crossing (Ф219 mm * 1200 m)

Ⅰ.Project Profile
Project Name: Project Baoding City Boye County Natural Gas Pipeline Crossing;
Construction Location: Baoding City Boye County Lijiatuo Countryside;
Main pipe material and specification: steel, Ф219mm;
Main pipe crossing length: 1200 m
Construction equipment: “Goodeng Machine”(Reinforced 90 T)GD450-LS, equipped with drilling rod(Ф89*4500mm), DCI FF2 locator.

Fig.1: Construction scene

Fig.2: Construction scene

Ⅱ.Construction procedure:
Piloting: Lasting 2 days, pilot speed 4-5 min/rod,torque 8-15 MPa, push & pull force 10-15 MPa;
Reaming: Barrel Reamer (400 mm), torque 15-26 MPa, push & pull force 8-12 MPa, mud pump flow 410L/min;
Cleaning: Barrel Reamer (400 mm), torque 12-20 MPa, push & pull force 8-10 MPa,speed 3-5 min/rod, mud pump flow 360L/min;
Pulling back: starts at 7:30 am. 3rd Dec, 2019, pulling back torque 8-22 MPa, Pulling force 16-25 MPa, mud pump flow 410L/min. Sucessfully finished at 4:00 pm, 3rd Dec, 2019, lasting 9 hours.
Auxiliary mud: bentonite 3 T, a little caustic soda and polyethylenethane.

Fig.3: Piloting

Fig.4：Reaming

Fig.5：Under pulling

Fig.6 ：Successfully completed with unity

Ⅲ.Project Conclusion

“Goodeng Machine”GD450-LS Horizontal Directional Drilling Machine successfully completed Project Baoding City Boye County Natural gas pipeline crossing  (Ф219 mm * 1200 m).During this 1200-meter length crossing, GD450-LS HDD machine displays its extraordinary advantage such as stable torque, large unscrewing force etc. The successful message from the front construction line on 6th Dec another pipeline was completed successfully. This again verifies GD450-LS HDD machine is the edge tool in the trenchless construction.
 
Ⅳ. Introduction to GD450-LS Horizontal Directional Drilling Machine 

Fig.7:GD450-LS Horizontal Directional Drilling Machine

★Main technical parameters

Rig Weight	14500 kg	Dimension(L*W*H)	84500*2320*2650(mm)
Max. Push&Pull Force	480/960 kN	Max. Torque	27000 N·m
Max. Push&Pull Speed	55 m/min	Max. Rotation Speed	116 r/min
Engine Power	194 kW	Max. Mud Pump Flow	600 L/min
Caterpillar Walking Speed	3-5(km/h)	Max. Mud Pump Pressure	10 Mpa
Entry Drill Angle	12°-22°	Max. Climbing Gradient	18°
Max. Aperture Diameter	ø1500mm (Soil Depended)	Max. Crossing length	800m  (Soil Depended)

★Main characters 

1. German Rexroth automatic variable system is adopted for rotation, push & pull, clamping and walk, with load sensitivity control. Advanced hydraulic system raises more than 15%-20% productivity, and saves more than15%- 20% energy compared with traditional one. 
 

2. The machine is equipped with Cummins engine with high efficiency, large power, low fuel consumption, low noise and strong ability in construction.

3. Driving head reserves reinforced power (push & pull force). Push & pull force can be increased to 960KN, which ensures the safety of the construction in the construction of big diameter.

 4. Four bar linkage luffing structure is adopted for main girder, which highly increases entry angle range and ensures the large angle and rig tracks are not off ground, having improved the safety performance.

5. Wire-control walking system can be used to ensure the safety in the process of walk, transfer and load & unload.

 6.Reversible manipulator is convenient for loading and unloading drill rod, which can greatly reduce the workers labor intensity, and improve work efficiency.

 7.Electric design is reasonable with low failure rate, which is easy to maintain.

8.Push & pull contains rack and pinion push-pull system, which is good for high efficiency, long lifespan, stable work, and maintenance is also convenient.

  9.The steel track with rubber plate is adopted for crawler, which can not only bear high load, but also satisfy walking on different roads