- Construction Machinery Parts[10]
- Mining Machinery Parts[10]
- Tool Parts[5]
- Drilling Rig[3]
- Other Construction Machinery[1]
- Other Mining Machinery[1]
- Material Handling Equipment Parts[1]
- Metal Processing Machinery Parts[4]
- Drill Bit[3]
- Other Machine Tools Accessories[1]
- Used Mining Machinery[2]
- Metal Building Materials[1]
- Steel Pipes[1]
- Pumps[1]
- Contact Person : Ms. Chen Kathy
- Company Name : Beijing Feilong International Trade Co., Ltd.
- Tel : 86-10-6340 5086
- Fax : 86-10-6340 7657
- Address : Beijing,Beijing,B2-0645 ROOM, CENTURY-TEA-TRADE-CENTER, NO.10 MALIANDAO ROAD, XUANWU DISTRICT, BEIJING
- Country/Region : China
- Zip : 100055
drill collar
According to its different figures and materials, it can be divides into three types:
1.columnar: made from ordinary alloy steel, both inside and outside of the cross section of the pipe are cycloidal.
2. spiral: made from ordinary alloy steel, with a spiral chute on the outer surface of the pipe.
3. non-magnetic: made from stainless alloy-steel of low magnetic permeability, both inside and outside of the cross section of the pipe are rounded.
Technical specification:(the part of size)
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drill collar
