Cement slurries, cured cement and methods of making and use thereof

Patent metadata

Field	Value
Publication number	US-11292954-B2
Application number	US-202016993734-A
Country	US
Kind code	B2
Filing date	Aug 14, 2020
Priority date	Aug 16, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

Cured cements, cement slurries, and methods of making cured cement and methods of using cement slurries are provided. The cured cement comprises cement, carbon nanotube sponges disposed within the cement, and conductive fibers disposed within the cement, in which the conductive fibers interconnect the carbon nanotube sponges and form a conductive web within the cured cement.

First claim

What is claimed is:

1. A cured cement comprising:
cement,
boron-doped carbon nanotube sponges disposed within the cement,
a dispersing agent comprising polycarboxylate ether, and
conductive fibers disposed within the cement, in which
the conductive fibers interconnect the boron-doped carbon nanotube sponges and form a conductive web within the cured cement.

2. The cured cement of claim 1 , in which the carbon nanotube sponges further comprise at least one of nitrogen or sulfur.

3. The cured cement of claim 1 , in which the boron-doped carbon nanotube sponges are functionalized with carbon nanotubes.

4. The cured cement of claim 1 , in which the boron-doped carbon nanotube sponges are capable of storing electric energy.

5. The cured cement of claim 1 , in which the boron-doped carbon nanotube sponges are randomly dispersed throughout the cured cement.

6. The cured cement of claim 1 , in which the cement is hydraulic.

7. The cured cement of claim 1 , in which the cement is non-hydraulic.

8. The cured cement of claim 1 , in which the cement comprises at least one of Portland cement, siliceous fly ash, calcareous fly ash, slag cement, silica fume, calcium hydroxide, silicates, belite (Ca 2 SiO 5 ), alite (Ca 3 SiO 4 ), tricalcium aluminate (Ca 3 Al 2 O 6 ), tetracalcium aluminoferrite (Ca 4 Al 2 Fe 2 O 10 ), brownmillerite (4CaO.Al 2 O 3 .Fe 2 O 3 ), gypsum (CaSO 4 .2H 2 O), sodium oxide, potassium oxide, limestone, lime (calcium oxide), hexavalent chromium, calcium aluminate, and combinations thereof.

9. The cured cement of claim 1 , in which the cured cement further comprises a surfactant.

10. The cured cement of claim 9 , in which the surfactant comprises at least one of anionic surfactants, cationic surfactants, amphoteric surfactants, zwitterionic surfactants, nonionic surfactants, or combinations thereof.

11. The cured cement of claim 1 , in which the cured cement is capable of conducting electric current.

Assignees

• Saudi Arabian Oil Co

Inventors

• Boul Peter J
• Santra Ashok

Classifications

• C09K8/428

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

• H01B1/18

  the conductive material comprising carbon-silicon compounds, carbon or silicon · CPC title

• C04B20/0048

  Fibrous materials · CPC title

• C04B14/026 Primary

  of particular shape, e.g. nanotubes · CPC title

• C04B2103/408

  Dispersants · CPC title