In a method for producing a coiled tubing (RW) from a thermoplastic material, in a first shaping step a tubular extrudate (EX) is extruded via an annular nozzle gap (16) in an extruder (12) before, in a second shaping step directly following the first shaping step, the extrudate which is drawn down from the nozzle gap and is still plastically deformable is calibrated in a shaping device (18) in order to obtain a geometrically defined profile cross section (PQ) and is shaped into the coiled tubing, whereupon the coiled tubing having the geometrically determined profile cross section solidifies. This method allows for continuous production of the coiled tubing with a new, high quality in respect of dimensional and shape tolerances on the profile cross section of the coiled tubing. The invention also relates to a device (10) for producing such a coiled tubing.

A strand profile (10) is proposed. The strand profile (10) extends in a longitudinal extent direction (22), the strand profile (10) having a first layer structure (24) arranged around the longitudinal extent direction (22) and a second layer structure (32) surrounding the first layer structure (24), the first layer structure (24) comprising a first multiplicity of layers (26), each layer (26) of the first layer structure (24) having multiple fibers (28), the second layer structure (32) comprising a second multiplicity of layers (34), each layer (34) of the second layer structure (32) having multiple fibers (36), the fibers (28) of the first multiplicity of layers (28) and the fibers (36) of the second multiplicity of layers (34) each extending in longitudinal extent directions (30, 38), the longitudinal extent directions (30) of the fibers (28) of the first multiplicity of layers (26) and the fibers (36) of the second multiplicity of layers (34) each being oriented at an angle with a magnitude in a range from 30 to 60, and preferably in a range from 40 to 50, with respect to the longitudinal extent direction (22) of the strand profile (10), the fibers (28) of the first multiplicity of layers (26) extending relative to the longitudinal extent direction (22) of the strand profile (10) in such a way that, in the presence of setpoint torsional loading of the strand profile (10), said fibers are subjected to longitudinal compressive loading in their longitudinal extent directions (30), the fibers (36) of the second multiplicity of layers (34) extending relative to the longitudinal extent direction (22) of the strand profile (10) in such a way that, in the presence of setpoint torsional loading of the strand profile (10), said fibers are subjected to longitudinal tensile loading in their longitudinal extent directions (38), the longitudinal extent directions (30) of the fibers (28) of adjacent layers (26) of the first multiplicity of layers (26) differing from one another by an angle with a magnitude in a range from 0 to 10, preferably 2 to 10 and even more preferably 2 to 6, the longitudinal extent directions (38) of the fibers (36) of adjacent layers (34) of the second multiplicity of layers (34) differing from one another by an angle with a magnitude in a range from 0 to 10, preferably 2 to 10 and even more preferab

A strand profile (10) is proposed. The strand profile (10) extends in a longitudinal extent direction (22), the strand profile (10) having a first layer structure (24) arranged around the longitudinal extent direction (22) and a second layer structure (32) surrounding the first layer structure (24), the first layer structure (24) comprising a first multiplicity of layers (26), each layer (26) of the first layer structure (24) having multiple fibers (28), the second layer structure (32) comprising a second multiplicity of layers (34), each layer (34) of the second layer structure (32) having multiple fibers (36), the fibers (28) of the first multiplicity of layers (28) and the fibers (36) of the second multiplicity of layers (34) each extending in longitudinal extent directions (30, 38), the longitudinal extent directions (30) of the fibers (28) of the first multiplicity of layers (26) and the fibers (36) of the second multiplicity of layers (34) each being oriented at an angle with a magnitude in a range from 30 to 60, and preferably in a range from 40 to 50, with respect to the longitudinal extent direction (22) of the strand profile (10), the fibers (28) of the first multiplicity of layers (26) extending relative to the longitudinal extent direction (22) of the strand profile (10) in such a way that, in the presence of setpoint torsional loading of the strand profile (10), said fibers are subjected to longitudinal compressive loading in their longitudinal extent directions (30), the fibers (36) of the second multiplicity of layers (34) extending relative to the longitudinal extent direction (22) of the strand profile (10) in such a way that, in the presence of setpoint torsional loading of the strand profile (10), said fibers are subjected to longitudinal tensile loading in their longitudinal extent directions (38), the longitudinal extent directions (30) of the fibers (28) of adjacent layers (26) of the first multiplicity of layers (26) differing from one another by an angle with a magnitude in a range from 0 to 10, preferably 2 to 10 and even more preferably 2 to 6, the longitudinal extent directions (38) of the fibers (36) of adjacent layers (34) of the second multiplicity of layers (34) differing from one another by an angle with a magnitude in a range from 0 to 10, preferably 2 to 10 and even more preferab

A method and an apparatus of manufacturing flexible pipe body (100) is disclosed. The method includes the step of winding at least one composite body having a substantially helical innate shape around an underlining pipe layer.

A method and an apparatus of manufacturing flexible pipe body (100) is disclosed. The method includes the step of winding at least one composite body having a substantially helical innate shape around an underlining pipe layer.

In a method for producing helical coils, in particular for coil screens, a filament is conveyed in a filament conveying direction through a first channel portion of a first rotation body, and subsequently conveyed through a second channel portion of a second rotation body which rotates synchronously with the first rotation body. The filament is subsequently wound around a protruding winding mandrel, such that a helical coil is produced from the filament by a continuous feed of the windings of the filament wound around the winding mandrel. A heated heating fluid flows with an excess pressure through the first channel portion and the second channel portion, arranged downstream, and in the process heats the filament conveyed through the first channel portion and subsequently through the second channel portion. The filament emerging from the second channel portion is deformed, using a deformation apparatus, prior to winding onto the winding mandrel.

In a method for producing helical coils, in particular for coil screens, a filament is conveyed in a filament conveying direction through a first channel portion of a first rotation body, and subsequently conveyed through a second channel portion of a second rotation body which rotates synchronously with the first rotation body. The filament is subsequently wound around a protruding winding mandrel, such that a helical coil is produced from the filament by a continuous feed of the windings of the filament wound around the winding mandrel. A heated heating fluid flows with an excess pressure through the first channel portion and the second channel portion, arranged downstream, and in the process heats the filament conveyed through the first channel portion and subsequently through the second channel portion. The filament emerging from the second channel portion is deformed, using a deformation apparatus, prior to winding onto the winding mandrel.

A wire material for an elastic member includes: inner circumferential-side reinforced fibers that are wound in a spiral form; outer circumferential-side reinforced fibers that are provided on an outer circumference of the inner circumferential-side reinforced fibers; and thermosetting resin that is provided in at least a part of the inner circumferential-side reinforced fibers and the outer circumferential-side reinforced fibers and firmly fixes the reinforced fibers with each other. An angle formed by a winding direction of the inner circumferential-side reinforced fibers and a center axis of the winding is 70 to 110. A winding direction of the outer circumferential-side reinforced fibers with respect to a center axis of the winding is along a direction of a tensile load applied to the wire material for the elastic member in accordance with a load applying torsional stress to the wire material for the elastic member as an externally applied load.

A wire material for an elastic member includes: inner circumferential-side reinforced fibers that are wound in a spiral form; outer circumferential-side reinforced fibers that are provided on an outer circumference of the inner circumferential-side reinforced fibers; and thermosetting resin that is provided in at least a part of the inner circumferential-side reinforced fibers and the outer circumferential-side reinforced fibers and firmly fixes the reinforced fibers with each other. An angle formed by a winding direction of the inner circumferential-side reinforced fibers and a center axis of the winding is 70 to 110. A winding direction of the outer circumferential-side reinforced fibers with respect to a center axis of the winding is along a direction of a tensile load applied to the wire material for the elastic member in accordance with a load applying torsional stress to the wire material for the elastic member as an externally applied load.

An introducer sheath includes an inner liner having a passageway extending longitudinally therethrough, a coil positioned over the inner liner, and an outer jacket positioned over the liner and the coil. The outer jacket is bonded to the inner liner between the coil turns. The coil turns have a cross-section comprising opposing end portions, and a center portion disposed between the opposing end portions. The center portion has a thickness not exceeding about one-third of a thickness of the end portions for reducing a bending modulus of the coil, and the end portions have a generally curved outer surface. At least a distal end portion of the outer jacket has a durometer between about 70 and 90 on the Shore D scale.