The body of Fixed Diameter Hole Opener is made of tough heat treated alloy steel for maximum strength. Cutter arms, equipped with removable cutter, are hard-faced and welded on body. The hole openers have three or six jet tubes with replaceable nozzles, so that jet streams quickly clean the enlarged hole. Our company have the following 2 kinds of fixed diameter hole opener: 3 roller cones hole opener and 4 roller cones hole opener.
Specifications of Fixed Diameter Hole Opener
| Type | Std. Hole open; mm | Qty. of Roller Cones | Mini. Pilot Hole; mm | Fishing OD. | Bottom Connection; API | ID. mm | Total Length; mm | ||
| Length; mm | OD. mm | Top Connection; API | |||||||
| KZ311 | 311 | 3 | 216 | 457.2 | 203 | 6-5/8 REG | 4-1/2 REG | 38 | 1524 |
| KZ-444 | 444.5 | 3 | 266.7 | 457.2 | 241 | 7-5/8 REG | 7-5/8 REG | 57 | 1752 |
| KZ-660 | 660.4 | 3 | 444.5 | 457 | 241 | 7-5/8 REG | 7-5/8 REG | 76 | 1752 |
| KZ-914 | 914.4 | 3 | 609.6 | 508 | 241 | 7-5/8 REG | 7-5/8 REG | 76 | 1905 |
| KZ-914(4) | 914.4 | 4 | 457.2 | 1092 | 254 | 7-5/8 REG | 7-5/8 REG | 89 | 2642 |
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