Composite coiled tubing apparatus and methods

Details Composite coiled tubing apparatus and methods Composite coiled tubing apparatus and methods

1996-01-29

1998-10-27

Kincaid, Kristine L.

Electricity: conductors and insulators

Conduits, cables or conductors

Extensible

138123, 138137, H01B 706

Patent

active

058280030

ABSTRACT:
Products and methods relating to composite materials and their use in coiled tubing is disclosed. The composite tubing is a pressurized structure for conveying fluids downhole in a wellbore. It has 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 structure having a blend of fibers of different types or orientations is shown. The disconnecting structure shows a failure load range corresponding to the failure characteristics of the fiber blend, the fiber blend having a predetermined failure limit.

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