Patent
Use of radiation-induced polymers as temporary or permanent diverting agent
TLDR
In this article, a water-soluble polymer is obtained as a product of radiation-induced polymerization of acrylamide and/or methacrylamides and acrylic acid, methacrylic acid, and or alkali metal salts thereof.Abstract:
Temporary or permanent permeability reduction or plugging of porous medium to the flow of fluids is effected by treating, preferably by injecting under pressure into the pores, the porous medium with an aqueous solution containing a water-soluble polymer obtained as a product of radiation-induced polymerization of acrylamide and/or methacrylamide and acrylic acid, methacrylic acid, and/or alkali metal salts thereof. The polymer has sufficient properties to effect substantial permeability reduction of the porous medium. The polymerization is preferably carried out in 10-60 percent aqueous monomer solution with gamma radiation. A mixture of monomers, before radiation, preferably contain 25-99 percent acrylamide and 75-1 percent sodium acrylate. Permeability can be restored by subsequently treating the porous medium with a chemical to break down the polymer, e.g., hydrazine hypochlorite solution, strong mineral acids, or bases.read more
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Soluble deverting agents
TL;DR: In this article, a method for stimulating single and multiple intervals in underground wells by diverting well treatment fluids into a particular direction or into multiple intervals using water soluble coated diverting agents is described.
Patent
Method for primary cementing a well with a drilling mud which may be converted to cement using chemical initiators with or without additional irradiation
TL;DR: In this paper, a process for drilling and primary cementing a well using a drilling fluid containing a polymeric material which may be converted into a well cement by contact with an initiator and, optionally, by irradiation with a suitable radioactive source is described.
Patent
Open-hole wellbore lining
TL;DR: In this article, a fluid composition that is solidifiable or gellable on exposure to actinic radiation of a predetermined wavelength at the wall of an open-hole wellbore is described.
Patent
Drilling mud composition which may be converted to cement upon irradiation
TL;DR: In this paper, a polymeric material which may be crosslinked in the presence of a monomeric cross-linking agent upon irradiation with a nuclear source was presented.
Patent
Method for primary cementing a well using a drilling mud composition which may be converted to cement upon irradiation
TL;DR: In this article, a process for drilling and primary cementing a well using a drilling fluid containing a polymeric material which may be cemented into a well cement by irradiation with a suitable radioactive source is described.
References
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Composition and use thereof for water shut-off
TL;DR: In this article, a mass of discrete particles, each of which consists of a hard core nucleus, an interlayer of a colloid-forming, water-dispersible animal protein adhesive, and an outer coating of a water-insoluble, waterswellable polymer.
Patent
Use of fluid flow barriers in the secondary recovery of oil
Jr James R Latimer,Gene W Snell +1 more
TL;DR: Water-soluble partially hydrolyzed polyacrylamides are particularly well adapted for use as viscosity increasing additives in the method as discussed by the authors, and relatively small amounts are effective in achieving the desired increase in visosity.