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Methods of Increasing Bonding Strength for Polymers Coated on Solid Particles

IP.com Disclosure Number: IPCOM000225979D
Publication Date: 2013-Mar-19
Document File: 2 page(s) / 43K

Publishing Venue

The IP.com Prior Art Database

Abstract

Polymer coated proppant pack (water sensitive porous medium) has been used in downhole tools, downhole gravel pack and frac-pack for automatically controlling downhole water production, but not affecting hydrocarbons production. Under high fluid production rates, the coated polymers could be slowly wiped out of particle's surface to make the porous medium lose the water sensitive function. This invention provides a method to increase bonding strength for polymers coated on proppants through doping polymer crosslinking agents (ions) on the surface of proppants first and coating the polymers later. The doped crosslinking agents act as glue to strongly bond polymers on proppants. Lab testing results through SEM show that zirconium ions from zirconium lactate complex can be doped on 30/40 mesh HSP ceramic proppants at 200C for 12 hours. Polymer crosslinking ions for this doping include ions, such as aluminum, boron, chromium, titanium, and zirconium; and organic agents, such as polyethyleneimine (PEI).

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Methods of Increasing Bonding Strength for Polymers Coated on Solid Particles

Polymer coated proppant pack (water sensitive porous medium) has been used in downhole tools, downhole gravel pack and frac-pack for automatically controlling downhole water production, but not affecting hydrocarbons production. Under high fluid production rates, the coated polymers could be slowly wiped out of particle's surface to make the porous medium lose the water sensitive function. This invention provides a method to increase bonding strength for polymers coated on proppants through doping polymer crosslinking agents (ions) on the surface of proppants first and coating the polymers later. The doped crosslinking agents act as glue to strongly bond polymers on proppants. Lab testing results through SEM show that zirconium ions from zirconium lactate complex can be doped on 30/40 mesh HSP ceramic proppants at 200C for 12 hours. Polymer crosslinking ions for this doping include ions, such as aluminum, boron, chromium, titanium, and zirconium; and organic agents, such as polyethyleneimine (PEI).

Base 30/40 mesh ceramic proppant

Base 30/40 mesh ceramic proppant doped with zirconium lactate complex at 200C for 12 hrs