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Patent Searching and Data


Title:
SEALING MATERIAL FOR UNDERGROUND TREATMENT, UNDERGROUND TREATMENT METHOD, AND METHOD FOR SEALING WELL WALL
Document Type and Number:
WIPO Patent Application WO/2019/131952
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a sealing material for underground treatments which has excellent swelling performance and is effective in inhibiting mud leakage, etc. and which has improved applicability to drilled portions of a well. The sealing material for underground treatments according to the present invention comprises at least one poly(vinyl alcohol) resin selected from among unmodified poly(vinyl alcohol) and modified poly(vinyl alcohol) resins, the at least one poly(vinyl alcohol) resin having a degree of swelling through a 30-minute immersion in 80°C water of 250-900%.

Inventors:
SAKA Takahiro (2-4, Komatsubara-cho, Kita-ku, Osaka-sh, Osaka 18, 〒5300018, JP)
NAKAI Masaya (2-4, Komatsubara-cho, Kita-ku, Osaka-sh, Osaka 18, 〒5300018, JP)
Application Number:
JP2018/048338
Publication Date:
July 04, 2019
Filing Date:
December 27, 2018
Export Citation:
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Assignee:
MITSUBISHI CHEMICAL CORPORATION (1-1 Marunouchi 1-chome, Chiyoda-ku Tokyo, 51, 〒1008251, JP)
International Classes:
C09K8/512; C08L29/04; E21B43/26
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (Toranomon East Bldg. 10F, 7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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