Title:
COMPOSITION TEMPORARILY REDUCING PERMEABILITY OF UNDERGROUNDLAYER AND METHOD THEREOF
Document Type and Number:
Japanese Patent JPS62160398
Kind Code:
A
Abstract:
This invention relates to a composition and method of temporarily reducing the permeability of subterranean formations penetrated by a wellbore. In particular, it relates to an inexpensive, low molecular weight condensation product of hydroxy acetic acid with itself or compounds containing other hydroxy-, carboxylic-acid-, or hydroxycarboxylic-acid moieties and method for preventing fluid loss during well treatment.
Inventors:
BELLIS HAROLD EDWARD (US)
MCBRIDE EDWARD FRANCIS (US)
MCBRIDE EDWARD FRANCIS (US)
Application Number:
JP30895586A
Publication Date:
July 16, 1987
Filing Date:
December 26, 1986
Export Citation:
Assignee:
DU PONT
International Classes:
C09K8/88; E21B33/138; E21B43/22; E21B43/25; (IPC1-7): E21B43/22
Attorney, Agent or Firm:
Takehiko Suzue