石油技術協会誌
Online ISSN : 1881-4131
Print ISSN : 0370-9868
ISSN-L : 0370-9868
用語解説
Pressure Temperature Core Sampler(PTCS)
-圧力・温度保持コアサンプリング技術-
川崎 正行梅津 覚安田 優人
著者情報
ジャーナル フリー

2006 年 71 巻 1 号 p. 139-147

詳細
抄録

Pressure Temperature Core Sampler (PTCS) was designed and developed as a special coring tool in the methane hydrate (MH) R & D project in Japan. In order to recover in-situ methane hydrate bearing sediments without major dissociation while retrieving to the surface, inner barrel of PTCS retains downhole pressure by closing a ball valve and retains downhole temperature by an insulated chamber. A 2-5/8"(66.7 mm) OD × 3 m core sample is cut by 10-5/8"(269.9 mm) OD core bit and the inner barrel containing the core sample is wireline retrievable through special 6-5/8"(168.3 mm) drillpipe. The 1st PTCS was used on the occasion of the drilling campaign named MITI “Nankai Trough” in 1999-2000. After several elements had been improved, the 2nd PTCS was used on the drilling campaign named METI exploratory test wells “Tokai-oki to Kumano-nada” in 2004. In this campaign, the 2nd PTCS retrieved 161.3 m of high quality MH core samples at approximately 80% recovery.

著者関連情報
© 2006 石油技術協会
前の記事
feedback
Top