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EspañolEccentric Overburden Drilling System
Application Range:
The eccentric overburden drilling system is suitable for drilling water wells, geothermal wells, micro piles, and medium mini-type grouting holes in buildings, dams and harbor projects.
Design Principles:
The casing makes the drilling system easy to follow and operate.
Outstanding Advantages:
Simple structure, easy operation, reliable quality, retrievable drilling tools, and long service life.
1. As soon as the drilling starts, the reamer opens and enlarges the hole to drive the casing shoe and casing tube down.
2. When drilling in over-burden formation is complete, start reverse circulation in order to close the reamer. Then pull up the assembly through the casing tube.
3. The casing tube can be left in the hole, or can be pulled out by means of grout sealing material.
4. Use the normal drilling tools to drill and achieve the desired depth.
- Three Piece Eccentric Overburden Drilling System
- Two Piece Eccentric Overburden Drilling System
Three Piece Eccentric Overburden Drilling System
| A | E | C | D | Drill pipe | ||
| System No. | Outer Dia. | Thickness Range |
Reamed Dia. | Min. Inner Dia. of Casing Shoe | Hammer Type | Drill Pipe Range |
| KE85 | 108mm (4.25") |
9-15mm (0.35")-(0.59") |
118mm (4.65") |
86mm (3.4") |
DHD3.5, COP32, COP34 | 76mm (3") |
| KE90 | 114mm (4.5") |
11-13mm (0.43")-(0.51") |
127mm (5") |
91mm (3.6") |
DHD 3.5, COP32 COP34 |
76mm (3") |
| KE102 | 127mm (5") |
11mm-13mm (0.43")-(0.51") |
136mm (5.35") |
101mm (3.97") |
DHD 3.5, COP32 COP34 |
76mm (3") |
| KE115 | 140mm (5.5") |
13mm-16mm (0.51")-(0.63") |
152mm (5.98") |
117mm (4.6") |
DHD340, QL 40 SD-4 |
76mm (3") |
| KE115A | 146mm (5.75") |
14mm-19mm (0.55")-(0.75") |
154mm (6") |
117mm (4.6") |
DHD340, QL 40, SD-4 COP 42/44 |
76mm (3") |
| KE140 | 168mm (6.6") |
13mm-19mm (0.51")-(0.75") |
184mm (7.25") |
140mm (5.5") |
DHD350, QL50 / SD-5 COP52/54 |
76mm-89mm (3")-(3.5") |
| KE150 | 178mm (7") |
13mm-19mm (0.51")-(0.75") |
194mm (7.63") |
150mm (5.90") |
DHD350, QL50 / SD-5 | 76mm-89mm (3")-(3.5") |
| KE165 | 193mm (7.6") |
13mm-20mm (0.51")-(0.78") |
206mm (8.11") |
16 5mm (6.5") |
DHD360, QL60 / SD-6 | 89mm-114mm (3.5")-(4.5") |
| KE190 | 219mm (16.5") |
13mm-20mm (0.51")-(0.78") |
234mm (9.21") |
193mm (7.6") |
DHD360 QL60, SD-6 |
89mm-114mm (3.5")-(4.5") |
| KE210 | 245mm (9.64") |
14mm-21mm (0.55")-(0.85") |
260mm (10.25") |
210mm (8.25") |
DHD360/380, QL 60/80 SD-6/SD-8 |
114mm (4.5") |
| KE240 | 273mm (10.75") |
16mm-22mm (0.63")-(0.83") |
300mm (11.8") |
24 0mm (9.5") |
DHD380, QL80 SD-8 |
114mm-127mm (4.5")-(5") |
Two Piece Eccentric Overburden Drilling System
| A | E | C | D | |||
| System No. | Outer Dia. | Thickness | Reamed Dia. | Min. Inner Dia. of Casing Shoe | Hammer Type | Drill Pipe |
| K188 | 178 mm (7") |
13 mm - 19 mm (0.51")– (0.75") |
188 mm (7.4") |
144 mm (5.7") |
DHD350 QL 50, SD-5, COP52/54 |
76mm- 89mm (3") - (3.5") |
| K240 | 219 mm (8.62") |
12 mm- 15mm (0.47")-(0.59") |
240 mm (9.45") |
192 mm (7.5") |
DHD360, QL 60, SD-6, |
114 mm (4.5") |
| K305 | 273 mm (10.75") |
16 mm-20mm (0.63")-(0.78") |
305 mm (12") |
238 mm (9.4") |
DHD380, QL 80, SD-8 |
114mm - 127mm (4.5") - (5") |
| K360 | 323mm (12.7") |
20 mm - 24 mm (0.78") - (0.94") |
360 mm (14.17") |
284 mm (11.8") |
DHD380, QL 8, SD-8/10 |
127 mm (5") |
Inquiry Form
Product List
Maxdrill Rock Tools Co., Ltd.
Tel.: +86-851-88639105
+86-851-88639106
Fax: +86-851-88639108
Email: office@kemaico.com
Contact person: Hedy Huang
Nationwide customer service hotline: +86-851-88517787
