Insulated pipe and method for preparing same

a technology of insulating pipes and pipes, which is applied in the direction of ceramicware, other domestic objects, mechanical instruments, etc., can solve the problems of reducing insulation efficiency, reducing insulation efficiency, and putting the performance of the assembly at risk, and reducing the amount of insulating materials required

a technology of insulating pipes and pipes, which is applied in the direction of ceramicware, other domestic objects, mechanical instruments, etc., can solve the problems of reducing insulation efficiency, reducing insulation efficiency, and putting the performance of the assembly at risk, and reducing the amount of insulating materials required

US20060272727A1Inactive Publication Date: 2006-12-07CABOT CORP
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  • Insulated pipe and method for preparing same
  • Insulated pipe and method for preparing same
  • Insulated pipe and method for preparing same

Examples

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example

[0115] This example further illustrates the invention but, of course, should not be construed as in any way limiting its scope.

[0116] Four different amounts of silica aerogel particles were placed into a Plexiglas cell having an interior volume of 20×20×1 cm. In Sample A (control), the silica aerogel particles were disposed in the cell without any compression. In Samples B, C, and D (invention), increasing amounts of the silica aerogel particles were disposed in the cell with increasing amounts of compression to fit the silica aerogel particles within the interior volume of the cell.

[0117] For each sample, the percent compression was determined from the silica aerogel particle volume before compression (Vb) and the silica aerogel particle volume after compression (Va=working cell volume=400 cm3), i.e., the interior cell volume, using the following equation: Percent Compression=[(Vb-Va) / Vb]×100%. The bulk density of each sample was calculated by dividing the weight of the silica ae...

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Abstract

The invention provides an insulated pipe-in-pipe assembly comprising (a) at least one inner pipe, (b) an outer pipe disposed around the at least one inner pipe so as to create an annular space between the outer and inner pipes, (c) porous, resilient, compressible material disposed in the annular space, and (d) a remnant of a container that previously was positioned in the annular space and previously held the compressible material in a volume less than the volume of the compressible material in the annular space. The invention also provides a method for making such an insulated pipe-in-pipe assembly.

Description

PRIOR APPLICATIONS [0001] This application claims the priority of U.S. Provisional Application 60 / 687,672 filed on Jun. 6, 2005.FIELD OF THE INVENTION [0002] This invention pertains to a thermally insulated pipe-in-pipe assembly and a method of preparing the same. BACKGROUND OF THE INVENTION [0003] In deep-water hydrocarbon (e.g. oil, gas or mixtures thereof) extraction, crude oil or gas is extracted from below the sea floor and transferred via a pipeline system to the surface of the water. It is critically important to maintain the temperature of the oil or gas flowing through the pipeline, which typically is extracted at elevated temperatures (e.g., 60-300° C.), at temperatures above about 40° C. to avoid the precipitation of solid materials and hydrates which can lead to plugging of the pipeline and interfere with production. As the water temperature at great depths is slightly above freezing temperature (e.g, about 4° C.), provision must be made to insulate the pipelines. Furthe...

Claims

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Application Information

Patent Timeline
07 Dec 2006
Publication
US20060272727A1
IPC
F16L9/14
CPC
F16L59/143; Y10T29/49826; F16L59/153; C04B30/00; F16L59/028; C04B38/08; C04B14/064; C04B14/06
Inventors
DINON, JOHN L.; KALKSTEIN, HOBART C.