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Directional drilling
https://nipr.repo.nii.ac.jp/records/2220
https://nipr.repo.nii.ac.jp/records/22209bdd084d-fa7d-4f08-b678-33e3bbabe906
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000012773 (627.4 kB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 1994-03-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Directional drilling | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Zagorodnov,V.S.
× Zagorodnov,V.S.× Kelley,J.J.× Koci,B.R. |
|||||
著者所属(英) | ||||||
en | ||||||
Polar Ice Coring Office, University of Alaska Fairbanks/Polar Ice Coring Office, University of Alaska Fairbanks/Polar Ice Coring Office, University of Alaska Fairbanks | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Directional Drilling (DD) technology can be used in deep glacier boreholes to obtain additional ice cores from any depth and create supplemental boreholes for geophysical research on glacier ice properties under natural conditions. Experimental directional drilling was done using an antifreeze thermal electrical drill (ATED) in a PICO test well. A special device called a whipstock was used for the deflection of the ATED in previously-drilled borehole. The test demonstrated that a whipstock deployed in the main borehole permits directional drilling to obtain extra ice core. The experimental whipstock was placed 25cm above the bottom of the 4.5m deep borehole. The ATED was inclined in previously-prepared cavity to an angle of up to 3°. When the second borehole reached a depth of about 6m from the whipstock it had no inclination. The distance between axes of the main and secondary boreholes was about 0.3m. The whipstock was frozen into the main borehole during directional drilling experiment and afterwards, it was heated electrically and removed from the hole. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00733561 | |||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 49, p. 165-171, 発行日 1994-03 |