06279656 is referenced by 191 patents and cites 28 patents.

The invention is the method of treating of a well, a formation, or both, with the solids, liquids, or apparatuses, by 1) encasing the solids, liquids, or apparatuses in a water-soluble shell, 2) conveying the encased solids, liquids, or gases to the predetermined location in the well, and then 3) allowing the water-soluble shell to dissolve in the aqueous phase in the wellbore. The shell is preferably made of water-soluble polymers such as collagen, a crosslinking agent such as zolidine, optionally a hydrophobic compound such as a processed oil, and water used in processing. Other modifying or conditioning compounds, for example glycerin and other polymeric additives, may be incorporated to extend the strength or temperature range of the shell. The shell encases a variety of solids, liquids, or combinations thereof, where the solids or liquids are useful in the treatment of the well or of the producing formation. Illustrative encased material includes soap, acid, corrosion inhibitors, chelating agents, scale inhibitors, mutual solvents, paraffin inhibitors, paraffin dissolvers, clay stabilizers, and tracer materials. The encased materials may also be apparatuses, such as a prefabricated screen completion or a prefabricated sand-pack.

Title
Downhole chemical delivery system for oil and gas wells
Application Number
9/433178
Publication Number
6279656 (B1)
Application Date
November 3, 1999
Publication Date
August 28, 2001
Inventor
S Byron Smith
Houston
TX, US
A Richard Sinclair
Katy
TX, US
Agent
Howrey Simon Arnold & White
US
Assignee
Santrol
TX, US
IPC
E21B 43/00
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