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1. WO2020138253 - DIVERTING AGENT AND METHOD FOR CLOSING CRACK IN WELL USING SAME

Publication Number WO/2020/138253
Publication Date 02.07.2020
International Application No. PCT/JP2019/051044
International Filing Date 25.12.2019
IPC
C08F 8/00 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
8Chemical modification by after-treatment
C09K 8/508 2006.01
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
50Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
504Compositions based on water or polar solvents
506containing organic compounds
508macromolecular compounds
E21B 43/26 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
25Methods for stimulating production
26by forming crevices or fractures
CPC
C08F 8/00
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
8Chemical modification by after-treatment
C09K 8/508
CCHEMISTRY; METALLURGY
09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
8Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
50Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
504Compositions based on water or polar solvents
506containing organic compounds
508macromolecular compounds
E21B 43/26
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
25Methods for stimulating production
26by forming crevices or fractures
Applicants
  • 三菱ケミカル株式会社 MITSUBISHI CHEMICAL CORPORATION [JP]/[JP]
Inventors
  • 平野 泰広 HIRANO Yasuhiro
  • 坂 隆裕 SAKA Takahiro
  • 谷口 亮輔 TANIGUCHI Ryosuke
  • 風呂 千津子 FURO Chizuko
Agents
  • 特許業務法人栄光特許事務所 EIKOH PATENT FIRM, P.C.
Priority Data
2018-24509727.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) DIVERTING AGENT AND METHOD FOR CLOSING CRACK IN WELL USING SAME
(FR) AGENT DE DÉVIATION, ET PROCÉDÉ DE COLMATAGE DE FISSURE DE PUITS METTANT EN ŒUVRE CELUI-CI
(JA) ダイバーティングエージェント及びこれを用いた坑井の亀裂の閉塞方法
Abstract
(EN)
The purpose of the present invention is to provide a diverting agent that swells for a certain period of time (about 30 minutes to 5 hours) without being completely dissolved, so that a sufficient cold plugging property against cracks in wells is demonstrated, and after the certain period of time elapses, the diverting agent rapidly dissolves to elimination, even at a low temperature of 40-60°C. The present invention relates to a diverting agent including a modified polyvinyl alcohol resin.
(FR)
L'invention a pour objet de fournir un agent de déviation qui gonfle sans dissolution complète à une durée constante (durée comprise entre trente minutes et cinq heures), et développe ainsi des propriétés de fermeture à froid suffisantes vis-à-vis d'une fissure de puits, et qui permet un retrait rapide par dissolution y compris à des températures basses de 40 à 60°C, après écoulement d'une durée constante. Plus précisément, l'invention concerne un agent de déviation qui comprend une résine à base d'alcool polyvinylique modifié.
(JA)
本発明の課題は、一定時間(30分~5時間程度)は完全溶解せずに膨潤するので坑井の亀裂に対して十分な寒栓性を発揮し、かつ一定時間経過後は40~60℃の低温でも速やかに溶解除去されるダイバーティングエージェントを提供することである。本発明は、変性ポリビニルアルコール系樹脂を含有するダイバーティングエージェントに関する。
Also published as
JP2020563397
Latest bibliographic data on file with the International Bureau