High-pressure flexible pipe, comprising an inner liner and a tape, wrapped around and bearing against the inner liner, wherein the tape comprises a polymer matrix and a plurality of pultruded elements embedded in the polymer matrix, wherein the pultruded elements each comprise a plurality of elongated filaments covered by polymer resin.

A system for fracturing an underground formation includes a flexible pipe receiving a high pressure slurry from a missile outlet, the flexible pipe including one or more sections arranged in series. The system also includes a connector secured to an end of the flexible pipe, the connector adapted to fluidly couple the flexible pipe to one or more fracturing trees of a plurality of fracturing trees associated with a wellbore, wherein the flexible pipe directs the high pressure slurry into the wellbore, via the one or more fracturing trees, the flexible pipe being movable between respective fracturing tree inlets of the plurality of fracturing trees.

Provided are a rubber composition for hoses containing acrylonitrile butadiene rubber, a filler, a resorcin-formaldehyde precondensate, an aldehyde-ammonia vulcanization accelerator, and a fatty acid diester, and a hose including a layer formed using the same.

A flexible pipe includes: an inner liner formed as a tube and having an outer surface and an inner surface defining an inner diameter; a reinforcement layer bonded to the inner liner and including at least a first ply of reinforcing tape helically wrapped in a first helical direction about the inner liner and a second ply of reinforcing tape helically wrapped about the first ply of reinforcing tape, the second ply of reinforcing tape helically wrapped in a second helical direction opposite to the first helical direction; and an outer jacket applied over and bonded to the reinforcement layer, the outer jacket including a thermoplastic. A reinforcing tape for use in the pipe or other applications includes: a plurality of reinforcing fibers and a matrix about the plurality of reinforcing fibers to hold the reinforcing fibers in the form of a tape, the matrix including thermoplastic and an additive to increase the impact resistance of the thermoplastic.

A high-pressure pipe comprises an inner liner (1), an outer coating layer (6) and a reinforcement layer (2, 5) positioned between the inner liner and the outer coating layer. The reinforcement layer has helically wound strips (2, 5) which each comprise a matrix (4) and fibers (3) embedded in the matrix; the fibers consist of a multitude of twisted high-strength filaments. With an aim of providing a relatively high bending flexibility, the filaments of a fiber are sized filaments obtained by subjecting the filaments to a sizing operation.

To provide a hose having excellent durability, such as heat resistance and oxidation resistance, a polyamide resin composition includes: a polyamide(A), a polyolefin elastomer (B), a phenolic antioxidant (C), a sulfur-based antioxidant (D), and a metal deactivator having a hindered phenol structure (E). The phenolic antioxidant (C) is a different substance from the hindered phenolic metal deactivator (E). Based on 100 parts by weight of the polyamide (A) and the polyolefin elastomer (B) in total, the content of the phenolic antioxidant (C) is 0.2 parts by weight or more, the sulfur antioxidant (D) is 0.2 parts by weight or more, and the metal deactivator (E) is 0.01 parts by weight to 1.5 parts by weight. A barrier layer 2 of a hose 1 produced using a polyamide resin composition having such a composition not only has high durability, such as heat resistance and oxidation resistance, but also has high gas barrier properties.

An offshore installation comprising a riser pipe and a bend stiffener. The riser pipe comprises a flexible pipe body having a pipe length and an end fitting and the riser has a longitudinal pipe axis. The bend stiffener comprises a helically shaped body arranged to surround a stiffened length section of the flexible pipe body. The bend stiffener has a root end and a far end, wherein the root end is closer to the end fitting than the far end and the root end is locked at an axial distance to the end fitting, determined along the longitudinal pipe axis.

An elongate tape element (508), a flexible pipe body and method of producing a flexible pipe body are disclosed. The tape element has a cross-sectional profile comprising a body portion (510) for being positioned between collapse resistant tape windings such that each body portion lies at least partially in a gap (512) between adjacent collapse resistant tape windings (501); and at least one wing portion (516) extending from an end region of the body portion (510), the at least one wing portion (516) configured to span the gap (512) and respectively abut with a radially inner surface of an adjacent collapse resistant tape winding (501).

A pipe is used for control and forced circulation of corrosion-inhibiting fluids in an annulus thereof, the annulus located between an inner pressure barrier and an outer cover of the pipe and containing a number of layers. The pipe includes two layers of tensile armor within the annulus; at least one injection pipe laid helicoidally on the longitudinal extension of the pipe; at least one return pipe laid helicoidally on the longitudinal extension of the pipe; and a ventilation layer within the annulus, the ventilation layer being configured to facilitate the flow of fluids longitudinally through the annulus of the pipe.

A refrigerant transport hose excellent in both durability and barrier properties is provided. The refrigerant transport hose 10 has a barrier layer formed from a resin composition containing a polymer component as an innermost layer. The polymer component contains a polyamide resin (A) and a polyolefin-based elastomer (B). The innermost layer is to be in direct contact with a refrigerant and an oil flowing in the refrigerant transport hose. The polymer component further contains a block copolymer (C) having a structure in which a polyamide block is grafted to a polyolefin skeleton. The content of the block copolymer (C) is 5 to 45 parts by mass with respect to 100 parts by mass of the polymer component. The total content of the polyolefin-based elastomer (B) and the block copolymer (C) is less than 70 parts by mass with respect to 100 parts by mass of the polymer component. The block copolymer (C) has bimodal melting peaks in differential scanning calorimetry (DSC). The melting peak temperature on the low temperature side is 85 C. or more, and the melting peak temperature on the high temperature side is 200 C. or more.