Methods and systems are disclosed for manufacturing or reinforcing of any length, shape, size, and any thickness pipe with a plurality of layers comprising at least a first reinforcement sheet, a pre-designed and localized resin-fortified Core, and a second reinforcement sheet. The Core includes A-regions which are designed to absorb less resin, and B-regions which are designed to absorb more resin. For reinforcing a pipe, a first reinforcement sheet is placed over the inside and/or the outside surface of the pipe. A pre-designed and localized resin-fortified Core is placed over and adhered to the first reinforcement sheet. Subsequently a second reinforcement sheet is placed over the surface of the Core, such that the Core stays between the first and the second reinforcement sheet. Next, the resin-saturated sheets and Core are cureddepending on the type of resinby partial or complete exposure to ambient temperature, to heat, or to light.

A tool for forming a composite structure may include two or more segments formed from a polymer material. The tool may further include a crush insert disposed between the two or more segments. The tool may also include a support shaft coupled between the two or more segments. A method of forming a mandrel may include forming segments of the mandrel through an additive manufacturing process. The method may further include assembling the segments relative to one another. The method may also include positioning a crush insert between each of the segments. A method of fabricating a composite structure is also disclosed.

The present invention describes a method for producing a leak-tight vessel for holding a gas and/or liquid, comprising the steps of winding a heat-sealable thermoplastic barrier strip around a removable mandrel in such a way that each strip fragment overlaps with a substantially parallel strip fragment over at least a lateral overlapping distance, consolidating the overlapping strip fragments so as to form a gas and/or liquid tight layer, winding a fibrous material around the gas and/or liquid tight layer, thereby leaving an opening large enough for removing the mandrel. The invention also describes a leak-tight vessel produced in this way.

A technique for manufacturing a millable bridge plug for plugging of a wellbore during, for example, a fracturing operation. A bridge plug is constructed with an obstructed internal passage. The obstructed internal passage is formed by winding a composite material about a wrapping mandrel having at least one cylindrical part and a solid part coupled thereto. The cylindrical part is removed after a curing process leaving a mandrel with a plugged internal passageway upon which a seal member combined with a plurality of slips for engaging a surrounding wall, e.g. a surrounding wellbore wall, may be coupled.

Disclosed is a liner reel, a cassette, a let off station and a method for collecting a liner, wherein the liner reel has a core and a shell that is concentrically mountable to said core for rotation together with said core about a liner reel axis, wherein the shell has a collection wall that extends in a circumferential direction about the liner reel axis when the shell is mounted to the core, wherein the collection wall is arranged for receiving the liner, wherein the core has a support wall extending in the circumferential direction for supporting the collection wall at least with a vector component in a radial direction perpendicular to the liner reel axis, wherein the collection wall is at least partially contractible in said radial direction when the shell is removed from the core.

A method for forming composite components includes disposing composite laminate over a mandrel. The method further includes infusing the composite laminate with a resin. A gelation of the infused resin is caused by applying a first environmental condition to the composite laminate and mandrel. At least a portion of the mandrel is deformed by applying a second environmental condition to the composite laminate and mandrel. The method further includes forming a composite structure by curing the composite laminate infused with resin. The deformed mandrel is removed from the composite structure after forming the composite structure.

A winding core for producing blade ends for rotor blades of wind power installations and to a mold for producing trailing edge segments is provided. Methods for producing a blade end, for producing a trailing edge segment and for producing a rotor blade and also to a rotor blade and a rotor blade series are provided. The winding core comprises a first section with a first end for forming a hub connection geometry for connecting the blade end to a rotor hub, and a second section with a second end for forming an outer blade connection geometry for connecting the blade end to an outer blade, wherein it is possible by exchanging or completely or partially removing the first section to vary a longitudinal extent of the winding core and/or a diameter of the first section and/or a shape of the first section such that blade ends produced therewith are suitable for wind power installations with different rotor diameters.

Methods and apparatuses for electromagnetic support tooling for use in composite part curing are described. In one example, a support tooling, such as a mandrel, includes an elastomeric housing that has ferromagnetic components. The mandrel also has electro-magnetic coils positioned within the elastomeric housing and operable to generate magnetic fields to repel or attract the ferromagnetic components of the elastomeric housing to the electro-magnetic coils. When the ferromagnetic components of the elastomeric housing are repelled by the electro-magnetic coils, the elastomeric housing has a rigid surface state. When the ferromagnetic components of the elastomeric housing are attracted to the electro-magnetic coils, the elastomeric housing is collapsed.

The invention relates to a method for producing structural elements (14) that comprise a hollow profile (1) made of continuous fibre-reinforced plastics material that comprises a thermosetting matrix material that has a softening temperature that is below the cross-linking temperature, and at least one load-application element (15), and to a structural element (14) produced by the method and comprising a hollow profile (1) made of continuous fibre-reinforced plastics material that comprises a thermosetting matrix material that has a softening temperature that is below the cross-linking temperature, and at least one load-application element (15), the hollow profile (1) and the load-application element (15) being interconnected in a form-fitting manner. The method according to the invention comprises at least the following method steps: a. providing a cut-to-size hollow profile (1) made of plastics material (3) that is reinforced by continuous fibres, on a liner (2), wherein the liner (2) forms the inner lateral surface of the hollow profile (1), and wherein the hollow profile (1) is impregnated by means of heating to a temperature that is equal to or above the softening temperature of the matrix material (9) and below the cross-linking temperature of the matrix material (9); b. removing the liner (2) in the inner region (17) of the hollow profile (1) that is intended for load application; c. arranging a load-application element (15) on the inner region (17) of the hollow profile (1) that is intended for load application; d. consolidating and functionalising the structural element (14) consisting of the hollow profile (1) and the load-application element (15) by means of heating the structural element (14) to a temperature that is equal to or above the cross-linking temperature of the matrix material (9) and applying a radially inwardly acting pressure to the structural element (14), wherein the hollow profile (1) is moulded onto the load-application element (15) in a form-fitting manner.

A tool for forming a composite structure may include two or more segments formed from a polymer material. The tool may further include a crush insert disposed between the two or more segments. The tool may also include a support shaft coupled between the two or more segments. A method of forming a mandrel may include forming segments of the mandrel through an additive manufacturing process. The method may further include assembling the segments relative to one another. The method may also include positioning a crush insert between each of the segments. A method of fabricating a composite structure is also disclosed.