Horizontal Hole Openers Vs. Underreamers

There is usually a lot of confusion around both these terms and on most occasions, they are used interchangeably without even knowing the difference. While it is quite evident that both these tools are used for enlarging a pre-existing bore, what needs to be understood is that while one has a fixed diameter, the other has an expandable diameter.

Talking of horizontal hole openers, it is the tool with the fixed diameter and is mostly used in applications where there are no restrictions for drilling larger top hole sections. Hole openers can solve several purposes – enlarge a hole, act as a stabilizer, used for a wiper trip, and more. Even though these tools run with roller cones, bladed hole openers are also gaining popularity.

Considering the fact that horizontal hole openers need to sustain heavy loads during operations, they are usually made of high-grade alloy steel. PDC hole openers are among the most widely used hole openers used in the drilling industries across the globe and their design options usually include helical blades, centralisation, gauge protection (PCD/TCI), back-reaming protection etc.

Talking of another type, which is the VRS hole opener, is a roller-cone embedded hole opener used in soft to very hard applications. It is generally used in operations where crushing the rock is superior to shearing. Once you know what type of hole opener will suit your application the best, it is important you find a reliable manufacturer.

Rockpecker uses top of the line degree of workmanship and skill to make sure all PDC drill bits as well as hole openers are crafted for your use and requirement to perfection by our experienced professionals. Our PDC drill bits are usually equipped with hardened alloy steel base material, high-performance PDC cutters, gauge protection, and several other features that can also be changed according to your requirements. Feel free to visit www.rockpecker.com or more information. You can also write to us at bits@rockpecker.com.