Deepflex Inc.

Wellstream, Inc.

Changchun Gaoxiang Special Pipe Co., Ltd.

Bin Chen

Mark D Kalman

Shichun Li

Yanhua Xiu

Pingyuan Xia

A hybrid flexible pipe and method of manufacture having one or more web layers over a tubular core and a polymer layer over the web layers and tubular core. A flexible helical reinforcement layer having gaps between strips is wrapped on top of the polymer layer. A second flexible helical reinforcement layer having gaps between strips is helically wrapped around the first helical reinforcement layer in the opposite direction. A sheath layer is positioned as the outermost layer. A first flexible helical anti-extrusion layer having a first anti-extrusion strip can be helically wrapped around the first flexible helical reinforcement layer in substantially the same direction as the first flexible reinforcement layer and a second flexible helical anti-extrusion layer having a second anti-extrusion strip can be helically wrapped around the at least one second flexible helical reinforcement layer in substantially the same direction as the second flexible helical reinforcement layer.

Hybrid pipe design and method of manufacture

Embodiments disclosed herein relate to one or more embodiments of and methods to make a reinforced flexible pipe. The reinforced flexible pipe includes a pipe structure, a first composite tape member having a T-shaped cross section, and a second composite tape member having a T-shaped cross section, in which the first composite tape member is wrapped on the pipe structure in a first orientation and the second composite tape member is wrapped on the pipe structure in a second orientation. One or more embodiments relate to a method of forming the same.

Composite flexible pipe and method of manufacture

A flexible conduit formed by a helically wound band of metal that resists burst pressure. The band has a leading edge hook and a trailing edge hook that engage and interlock. The cross-section of the band has a radially asymmetrical Z-shaped profile. When the band is helically wound, the downstream hook of one turn of the band is received in the upstream valley of the previous turn of the band so that the downstream and upstream hooks form an interlock holding the windings together. In the wound configuration, the thickness of the profile between the upstream valley and the internal surface of the tube is greater than the thickness of the profile between the downstream valley and the external surface of the tube to provide greater material thickness to reduce contact stress at the hook and valley interface and to reduce alternating stresses in the valley corners. The outer surface of the profile tapers towards the center of the tube to direct externally applied radial compression forces toward the thickest section of the profile. A multilayer conduit employing the band may include a central, helically wound collapse-resistant layer disposed within a flexible fluid barrier that in turn is disposed within the tube formed by the band. The conduit may be wrapped with one or more tensile strength layers, anti-wear layers, and additional fluid barriers.

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Houston, TX, United States of America

Bin Chen