Engineered nano-modified methyl methacrylate polymer for repair of 30 microM microcracks

Patent metadata

Field	Value
Publication number	US-11066592-B2
Application number	US-201816607356-A
Country	US
Kind code	B2
Filing date	Apr 20, 2018
Priority date	Apr 25, 2017
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

A method and sealant to seal microcracks as small as 30 μm by causing methyl methacrylate combined with one or more nanoparticles to flow into the microcrack to be sealed.

First claim

What is claimed is:

1. A method of using a sealant to seal microcracks as small as 30 μm in a wellbore having a casing comprising the steps of: 1) filling a bottom hole of the wellbore with filler solution to an area below the area to be repaired; 2) mixing a polymer sealant comprising methyl methacrylate with one or more alumina nanoparticles in order to increase the degree of polymer crystallization, wherein said methyl methacrylate contains sufficient alumina nanoparticles by weight to change the ductility and/or control the hardening time of said methyl methacrylate to create a nano-modified polymer prior to placement of said nano-modified polymer in the microcracks to be sealed; 3) filling a portion of the casing with said nano-modified polymer sealant, said nano-modified polymer sealant positioned above and below the area to be repaired; 4) subjecting said nano-modified polymer sealant to pressure to cause said nano-modified polymer sealant to flow into the microcracks to be sealed; 5) adding an anti-hardening agent to maintain any remaining nano-modified polymer sealant in fluid form; and then 6) removing the remaining nano-modified polymer sealant.

2. The sealant of claim 1 said methyl methacrylate incorporates nanoparticles by weight in the range of 0.1% to 2.0%.

3. The method of claim 1 said methyl methacrylate incorporates nanoparticles by weight in the range of 0.4% to 0.6%.

4. The method of claim 1 wherein said methyl methacrylate incorporates 0.5% nanoparticles by weight of said methyl methacrylate.

Assignees

• Stc Unm
• Stenko Michael S
• Matteo Edward N
• Dewers Thomas
• Unm Rainforest Innovations
• Nat Tech & Eng Solutions Sandia Llc
• Transpo Ind Inc

Inventors

• Taha Mahmoud Reda
• Stenko Michael S
• Stormont John
• Matteo Edward N
• Genedy Moneeb
• Dewers Thomas

Classifications

• C09K8/428 Primary

  for squeeze cementing, e.g. for repairing · CPC title

• C09K8/467

  containing additives for specific purposes · CPC title

• C04B26/06 Primary

  Acrylates · CPC title

• C04B2111/70

  Grouts, e.g. injection mixtures for cables for prestressed concrete · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title