Hole Opener 1. Steel tooth & TCI available 2. 6"-42" in diameter 3. Strict Quality Control System
At some point it may be necessary to increase the size of a pre-drilled hole to a larger diameter or to drill large diameter holes. Hole opener bits are designed specifically for this purpose. Bits are custom manufactured in a wide range of styles to meet field requirements. A custom hole opener is an effective way of enlarging holes, hence the name "Hole Opener".
The Hole Opener Advantage
Straighter Holes - By drilling a smaller hole with a "pilot" bit, then attaching that said bit onto the bottom of the the hole opener. The hole opener will follow the path of the hole drilled by the smaller bit.Larger Holes with Smaller Rigs - By drilling a hole in stages, larger holes can be drilled with smaller rigs. A smaller hole requires less power.Replacing Cutters and Cutting Cost - On most Hole Opener designs, the cutters can be easily replaced. The cost to replace a cutter is a fraction of the cost to replace a large tricone rock bit.Cost of Large Rock Bits - Larger diameter rock bits not only cost a lot, they can be difficult to find. A more economic solution is to use a hole opener that uses smaller tricone rock bit segments..Flexability - Hole Openers can be fabricated in just about any size, and can be configured to drill through any formation.| Hole Size | Pilot Hole | Standard Fishing Nick O.D | Thread Type | |
| Upper | Lower | |||
| 7-5/8 | 5-5/8 | 5-1/2~6 | 4-1/2 REG | 3-1/2 REG |
| 8-1/2 | 5-5/8 | 5-1/2~6 | 4-1/2 REG | 3-1/2 REG |
| 10-5/8 | 7-5/8 | 8 | 6-5/8 REG | 4-1/2 REG |
| 12-1/4 | 8-1/2 | 8 | 6-5/8 REG | 4-1/2 REG |
| 14-3/4 | 10-5/8 | 8~9-1/2 | 6-5/8 REG | 6-5/8 REG |
| 17 | 10-5/8 | 8~9-1/2 | 6-5/8 REG | 6-5/8 REG |
| 17-1/2 | 10-5/8 | 8~9-1/2 | 6-5/8 REG | 6-5/8 REG |
| 20 | 15 | 8~9-1/2 | 6-5/8 or 7-5/8REG | 7-5/8 REG |
| 24 | 15 | 8~9-1/2 | 6-5/8 or 7-5/8REG | 7-5/8 REG |
| 26 | 15 | 8~9-1/2 | 6-5/8 or 7-5/8REG | 7-5/8 REG |
| 36 | 26 | 9-1/2~10-1/2 | 7-5/8 or 8-5/8REG | 8-5/8 REG |
| 42 | 26 | 9-1/2~10-1/2 | 7-5/8 or 8-5/8REG | 8-5/8 REG |
About Us
Hejian Wanxiang Drilling Equipments Co., Ltd. is a professional supplier of drilling tools and equipments in China. With flexible company structure and advanced technology, we have dedicated ourselves to supply the drilling industry with the best products available.
We take pride in offering prompt, courteous service to all facets of the Oilfield, Water Well, Mining and Construction Industries. We look forward to working with you to establish mutually beneficial relationship!
Please contact us for more information!
Hejian Roller Hole Opener
