Water well drilling rig: definition, type, technical parameters and local application in Linyi, Shandong

1、 Definition and classification of water well drilling rig

Water well drilling rig is a specialized engineering machinery equipment for drilling underground water wells, widely used in rural water supply, agricultural irrigation, geological exploration, ground source heat pumps, and engineering precipitation fields. According to the drilling principle, it can be mainly divided into the following three categories:

|Type | Working Principle | Applicable Strata | Typical Depth|

|Impact type | Drilling tool moves vertically back and forth, relying on gravity to break rock layers, without circulating well washing system | Loose soil layer, pebble layer, shallow weathered rock | ≤ 250 meters|

|Rotary type | Drill rod drives drill bit to rotate and cut rock layers, combined with mud or air circulation to discharge slag | Clay, sand layer, medium hard rock layer | 100-600 meters|

|Composite | Integrated rotation and impact functions, with rotation as the main function and automatic switching of impact mode when encountering hard layers | Complex strata (such as gravel layers and hard rock layers) | 200-800 meters|

Note: Modern mainstream equipment is mostly rotary or dual-purpose composite, balancing efficiency and adaptability.

Household small electric drilling rig (70-100 meters): ¥ 2300-7500

Crawler hydraulic drilling rig (200-400 meters): ¥ 23000- ¥ 45000

Large caliber reverse circulation drilling rig (120 meters): ¥ 50000- ¥ 80000

4、 Typical application scenarios

Water well drilling rigs play a key role in rural water supply projects in Shandong and across the country

Rural drinking water safety project: Linyi, Jining and other places replace shallow polluted water sources by drilling deep wells (100-300 meters) to ensure the drinking water quality of villagers.

Agricultural drought resistant irrigation: In the Yimeng mountainous area, JDL-280 or FY-280 drilling rigs are commonly used in navel orange and wheat planting areas, with a daily water output of 10-50 tons per well.

Ground source heat pump system: The household small BZ-100 drilling rig is widely used for installing ground source heat pump air conditioning wells. It can be driven by a 220V power supply and operated by a single person, suitable for villas and self built houses.

Engineering dewatering and pile foundation: In highway and bridge construction, the SJZ-168FL reverse circulation drilling rig is used for deep foundation pit dewatering, with an efficiency increase of 40% compared to traditional positive circulation.