The starting point of the JH7 project was the classic model L-12 from the "Land Song" series - this model has undergone thorough field testing in various complex conditions.
From L-12 to JH7, the following core capabilities have been fully retained:
· 1200-meter drilling capacity (N specification), meeting the mainstream requirements for medium and deep-hole construction
· Wucheng's 140kW reliable power, with fuel economy and output stability having been verified by the market.
Standardized and modular design ensures efficient transportation, assembly and maintenance.
The JH7 Precision Edition is a rational configuration optimization carried out by the "Land's Song" R & D team on the same technical platform, specifically for certain construction scenarios.
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Configuration parameters
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| Category |
Parameter item
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JH7
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| Dimensions and weight |
Length × Width × Height (mm)
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4218×1965×2325
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Overall weight of the machine
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8.6T
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Reference drilling capability
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B specification
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1400m
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N specification
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1200m
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H specification
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700m
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P specification
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300m
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Power system
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Engine
|
WEICHAI
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Rated power
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140 kW
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Rated rotational speed
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2000-2200rpm
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Electrical system
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24V
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Hydraulic system
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Main pump
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28MPa-235l/min
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Auxiliary pump
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20 MPa-40l/min
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Auxiliary pump
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20MPa-40l/min
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Auxiliary pump
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16MPa-30l/min
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Hydraulic oil cooling
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Air-cooled
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Rotating power head
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Power head form
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Plunger motor (manual speed control)
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Maximum torque
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1550 Nm /3000 Nm
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| Maximum rotational speed |
1300rpm
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Main winch
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Steel wire capacity
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/
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Increase the pulling force
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/
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Speed up
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/ | |
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Auxiliary winch
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Steel wire capacity
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1200m @ 8mm
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Increase the pulling force
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Empty-line drum: 13KN Full-line drum: 4KN |
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Speed up
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Empty drum: 183 meters per minute Full drum: 600 meters per minute |
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Input system
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Feed rate | Speed control |
| Pushing force | 79KN | |
| Promotion power | 127KN | |
| Angle of entry | 45-90 ° | |
| Length of the drill pipe | 1.5m / 2m | |
|
Mud pump
|
form | Three-cylinder piston high-pressure pump form |
| Maximum flow | 200L/min | |
| Maximum pressure | 8Mpa | |
| Product manufacturing process | Spraying | Whole machine electrophoresis + KTL powder coating |
| Assembly | Standardization, modularization | |
