在某些时候，可能benecessary增加一个预钻孔的尺寸更大的直径或todrill大直径的孔。 孔开瓶器位专门为thispurpose设计的。 位在广泛的风格，以满足fieldrequirements定制生产。 自定义孔揭幕战是扩大孔的有效途径，故名洞开瓶器“。

该扩孔器的优势

1. 直孔 - 从钻一个较小的孔与pilot'bit，那么把上述位上的扩孔器的底部。 Thehole首战将遵循由小位钻洞的路径。

2. withSmaller钻机较大的孔 - Bydrilling分阶段一个孔，较大的孔可钻较小的钻机。 Asmaller孔需要更少的功耗。

3. 更换刀具andCutting成本 - Onmost孔开瓶器的设计中，刀具可以容易地更换。 toreplace切刀成本的成本的一小部分，以取代一个大三牙轮钻头。

4. C 大岩石钻头OST - 大口径牙轮钻头，不仅耗费了大量的，theycan很难找到。 一个更经济的解决方案是采用开孔器thatuses小三牙轮钻头段..

5. 灵活性 - 孔开罐器可以制造在几乎anysize，并且可以配置钻透任何形成。

At some point it may benecessary to increase the size of a pre-drilled hole to a larger diameter or todrill large diameter holes. Hole opener bits are designed specifically for thispurpose. Bits are custom manufactured in a wide range of styles to meet fieldrequirements. A custom hole opener is an effective way of enlarging holes, hence the name Hole Opener'.

The Hole Opener Advantage

1.Straighter Holes- By drilling a smaller hole with a pilot'bit, then attaching that said bit onto the bottom of the the hole opener. Thehole opener will follow the path of the hole drilled by the smaller bit.

2.Larger Holes withSmaller Rigs- Bydrilling a hole in stages, larger holes can be drilled with smaller rigs. Asmaller hole requires less power.

3.Replacing Cutters andCutting Cost- Onmost Hole Opener designs, the cutters can be easily replaced. The cost toreplace a cutter is a fraction of the cost to replace a large tricone rock bit.

4. Cost of Large Rock Bits- Larger diameter rock bits not only cost a lot, theycan be difficult to find. A more economic solution is to use a hole opener thatuses smaller tricone rock bit segments..

5.Flexibility- Hole Openers can be fabricated in just about anysize, and can be configured to drill through any formation.