Composite coiled tubing apparatus and methods
US5933945A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1998 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Jan 26, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/5187
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Products and methods relating to composite materials and their use in coiled tubing is disclosed. The composite tubing is a pressurized means of conveying fluids downhole in a wellbore. It comprises a multilayered laminate that resists buckling within the wellbore and is fabricated into a hollow tube. The fibers are oriented in angular relationship to the longitudinal direction of the coiled tubing such as to provide appropriate strength and buckling characteristics to the coiled tubing. Further, the coiled tubing layered laminate may transmit signals representing data from downhole to the surface. In some embodiments, a composite disconnecting means comprised of a blend of fibers of different types or orientations is shown. The disconnecting means shows a failure load range corresponding to the failure characteristics of the fiber blend, the fiber blend having a predetermined failure limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.