04986355 is referenced by 204 patents and cites 6 patents.

A melted polymer of hydroxyacetic acid with itself or with other hydroxy-, carboxylic acid-, or hydroxycarboxylic acid-containing moieties is subjected to high shear and injected into an organic liquid which is inert to the polymer to form an organic liquid dispersion of very fine polymer particles. In one aspect the melted polymer is combined with the organic liquid and the combination is thereafter subjected to high shear to form the fine particle polymer dispersion. A dispersion agent may also be used to aid in dispersing the particles. The dispersion is used for fluid loss control and gel breaking in subterranean formations.

Title
Process for the preparation of fluid loss additive and gel breaker
Application Number
7/353947
Publication Number
4986355
Application Date
May 18, 1989
Publication Date
January 22, 1991
Inventor
Edward F McBride
Wilmington
DE, US
D Philip Cords
Newark
DE, US
Lisa A Cantu
Ponca City
OK, US
Charles R Clark
Ponca City
OK, US
Burton M Casad
Ponca City
OK, US
Assignee
Conoco
OK, US
IPC
E21B 43/26
E21B 33/138
View Original Source