翻訳と辞書 Words near each other ・ Holger Fach ・ Holger Freitag ・ Holger Gaißmayer ・ Holger Geffers ・ Holger Gehrke ・ Holger Geschwindner ・ Hole in the Wall Gang ・ Hole in the Wall Gang (comedy) ・ Hole in the Wall Gang (disambiguation) ・ Hole in the Wall Gang Camp ・ Hole In The Wall Golf Club ・ Hole in the World ・ Hole in Your Soul ・ Hole of Burning Alms ・ Hole of Horcum ・ Hole opener ・ Hole Patrol ・ Hole pincer ・ Hole punch ・ Hole punching (networking) ・ Hole railway station ・ Hole Rock ・ Hole Rößler ・ Hole saw ・ Hole set ・ Hole, India ・ Hole, Norway ・ Hole-board test ・ Hole-in-the-Ground ・ Hole-in-the-head frog Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Hole opener ： ウィキペディア英語版 Hole opener A hole opener is a device used to enlarge the borehole during a well drilling operation. It can be positioned either above the drill bit or above a pilot run inside the existing borehole. Numerous designs exist, in sizes varying from a couple of inches to above 50". Usages range from hydrocarbon drilling operations to water drilling or horizontal drilling. Hole opener arms have to sustain heavy loads during operations and are generally made of high-grade alloy steel, welded onto a solid alloy steel body. Some designs feature replaceable arms, allowing for size changes but decreasing overall robustness. ==See also == *Drilling rig *Driller (oil) *Drag bit *Drill bit *Drilling stabilizer 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Hole opener」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.