Methods of forming insulated pipeline bundles
US5791380A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1995 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Dec 12, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00706
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods of forming highly insulated pipeline bundles made up of one or more flow lines positioned within a continuous larger diameter outer sleeve are provided. The methods basically comprise the steps of filling the space between the outside of the flow lines and the inside of the outer sleeve with a foamed cement composition comprised of hydraulic cement, water, a gas and a foaming agent, allowing the hydration reaction between the hydraulic cement and the water in the cement composition to take place, and then heating the hydrated cement composition to evaporate and remove excess water in the cement composition and thereby increase the insulating properties of the cement composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.