TIANHE Fixed Diameter Hole Openers are used for expanding the drilled hole.

The cutters are manufactured under the severe quality control. All our TIANHE hole openers are field maintainable, with easy assembly and disassembly. They are all equipped with 3 or 4 cutters, as well as mud nozzles precisely located to clean the cutters and the hole simultaneously.

specification:

model:KKQ311,406,444 and so on

hole open diameter: 12 1/4'' to 26'' 

qty of cutters:3

fishing neck diameter 8'' to 10''

top connection (pin) 6 5/8REG to 7 5/8 REG

bottomconnection(box)6 5/8REG to 7 5/8REG

overall length 55'' to 69''