Title:
DIVERTING AGENT AND METHOD, FOR CLOSING CRACKS IN WELL, UTILIZING THE SAME
Document Type and Number:
WIPO Patent Application WO/2020/166598
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a diverting agent with outstanding control in terms of solubility in water, and which, during a drilling method that uses hydraulic fracturing, is not readily soluble during initial closing of a crack in a well but dissolves in water, and can easily be removed after there is no longer a need for closing. The diverting agent according to the present invention contains a powder-form polyvinyl alcohol resin having an average particle diameter of 800-2000 μm.
Inventors:
HIRANO YASUHIRO (JP)
TANIGUCHI RYOSUKE (JP)
FURO CHIZUKO (JP)
TANIGUCHI RYOSUKE (JP)
FURO CHIZUKO (JP)
Application Number:
PCT/JP2020/005304
Publication Date:
August 20, 2020
Filing Date:
February 12, 2020
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
C09K8/508; C08F18/08; E21B43/26
Domestic Patent References:
| WO2018231236A1 | 2018-12-20 | |||
| WO2015072317A1 | 2015-05-21 |
Foreign References:
| CN107286916A | 2017-10-24 | |||
| CN106350043A | 2017-01-25 | |||
| CN103725277A | 2014-04-16 | |||
| CN105441047A | 2016-03-30 | |||
| CN107629774A | 2018-01-26 | |||
| JP2016056272A | 2016-04-21 | |||
| JP2016147971A | 2016-08-18 | |||
| JP2016147972A | 2016-08-18 | |||
| JP2002284818A | 2002-10-03 | |||
| JP2004285143A | 2004-10-14 | |||
| JP2006095825A | 2006-04-13 | |||
| JP2019023949A | 2019-02-14 |
Other References:
See also references of EP 3925984A4
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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