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Dissolvable Epoxy Based Encapsulant or Coating or a Part for Controlled Release of Chemicals Downhole

IP.com Disclosure Number: IPCOM000241269D
Publication Date: 2015-Apr-10
Document File: 1 page(s) / 14K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention relates to the use of dissolvable epoxy thermoset for acetic acid triggered release of chemicals downhole. Epoxy can be used in different forms such as encapsulant or coating or a portion of a tool. Such epoxy stores chemicals that are released once the epoxy is dissolved away on treating with acetic acid or sulfamic acid or similar organic acids. Chemicals that could be released via this technology could be one of or a combination of corrosion inhibitors, biocides, H2S scavengers, friction reducers, cement antistatic additives, asphaltene and paraffin controllers, scale inhibitors, iron sulfide controllers, etc. This thermoset barrier is much stronger and durable than conventional biodegradable or thermoplastic barriers. Also, this thermoset is not affected by other downhole fluids such as brine. This invention affects completions, production and pipeline services. Epoxy resin crosslinked with Recyclamine dissolves in acetic acid, sulfamic acid and other similar organic acid. This epoxy can be used as a structural barrier to separate and store chemicals from the downhole environment. When desired, this barrier can be dissolved away by applying acetic acid to release the chemicals to the borehole. Some embodiments of the dissolvable barrier could be a capsule, a coating or a structural part of a tool. Each capsule could contain multiple concentric capsules with the same or different chemicals. Similarly, multiple layers of chemicals, same or different, sandwiched by layers of dissolvable coatings can be made on any downhole tool, on the outer or internal diameter as permitted. Another embodiment could be a sacrificial part of a tool that dissolves away to release the stored chemicals. Chemicals that could be released via this technology could be one of or a combination of corrosion inhibitors, biocides, H2S scavengers, friction reducers, cement antistatic additives, asphaltene and paraffin controllers, scale inhibitors, or iron sulfide controllers.

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Dissolvable Epoxy Based Encapsulant or Coating or a Part for Controlled Release of Chemicals Downhole

This invention relates to the use of dissolvable epoxy thermoset for acetic acid triggered release of chemicals downhole.  Epoxy can be used in different forms such as encapsulant or coating or a portion of a tool.  Such epoxy stores chemicals that are released once the epoxy is dissolved away on treating with acetic acid or sulfamic acid or similar organic acids.  Chemicals that could be released via this technology could be one of or a combination of corrosion inhibitors, biocides, H2S scavengers, friction reducers, cement antistatic additives, asphaltene and paraffin controllers, scale inhibitors, iron sulfide controllers, etc.  This thermoset barrier is much stronger and durable than conventional biodegradable or thermoplastic barriers.  Also, this thermoset is not affected by other downhole fluids such as brine.  This invention affects completions, production and pipeline services.

Epoxy resin crosslinked with Recyclamine dissolves in acetic acid, sulfamic acid and other similar organic acid.  This epoxy can be used as a structural barrier to separate and store chemicals from the downhole environment.  When desired, this barrier can be dissolved away by applying acetic acid to release the chemicals to the borehole.  Some embodiments of the dissolvable barrier could be a capsule, a coating or a structural part of a tool.  Each capsule could contain multiple con...