Title:
MINING METHOD USING POLYLACTIC ACID PARTICLE, AND POLYLACTIC ACID PARTICLE
Document Type and Number:
Japanese Patent JP2016148193
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To enable resource gas, particularly, shale gas to be efficiently extracted through cracks by providing a mining method using polylactic acid particles with hydrolyzability, circularity and a particle diameter, appropriate for a hydraulic fracture.SOLUTION: A polylactic acid particle with a weight average molecular weight (Mw) of 10,000 or more has an average particle diameter (D) set to be in the range of 300-800 μm, and has circularity with a minor axis/major axis ratio of 0.8 or more. A mining method includes a step of mixing the polylactic acid particles and proppant into an aqueous dispersion medium fluid and pressing the fluid into an ore chute that is formed underground.SELECTED DRAWING: Figure 2
Inventors:
YOSHIKAWA SEISHI
KATAYAMA TADAYOSHI
KATAYAMA TADAYOSHI
Application Number:
JP2015025592A
Publication Date:
August 18, 2016
Filing Date:
February 12, 2015
Export Citation:
Assignee:
TOYO SEIKAN GROUP HOLDINGS LTD
International Classes:
E21B21/00; C08J3/205; E21B43/26; E21B43/34
Domestic Patent References:
| JP2014134090A | 2014-07-24 |
Foreign References:
| WO2014045815A1 | 2014-03-27 |
Attorney, Agent or Firm:
Naozumi Ono
Sachiko Okunuki
Sayaka Hirakawa
Toshiyuki Kojima
Sachiko Okunuki
Sayaka Hirakawa
Toshiyuki Kojima
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