The invention relates to long-dimensional flexible tubes (coiled tubing). There are three variants of the basic channels (of an umbilical coiled tubing) proposed and all of them have two kind of the external flanges (edged or shaped ones) and include means of production. All variants include multi-stage sequential shaping process of one or multiple strips at an estimated geometry, and where isolated channels, partitions and flanges are formed during this process. If required, longitudinal butts of an additional longitude strips can be welded to them to form an umbilical coiled tubing which can be reeled up to a drum. Other types of service channels (electric, fiber-optic, capillary etc.) can be placed inside or outside channels in the form of a flexible belts. Flanges located beyond the outside dimensions of an umbilical coiled tubing may have a wave-type of form. Welding seams, flanges, centers of a closed channels and partitions are located, mainly, on the middle line of an umbilical coiled tubing's cross-section. The umbilical coiled tubing makes it possible to significantly increase possibilities of coiled tubing units in technological operations as well as in artificial lift methods due to its multi-channel design and, consequently, multifunctionality.

The invention relates to long-dimensional flexible tubes (coiled tubing). There are three variants of the basic channels (of an umbilical coiled tubing) proposed and all of them have two kind of the external flanges (edged or shaped ones) and include means of production. All variants include multi-stage sequential shaping process of one or multiple strips at an estimated geometry, and where isolated channels, partitions and flanges are formed during this process. If required, longitudinal butts of an additional longitude strips can be welded to them to form an umbilical coiled tubing which can be reeled up to a drum. Other types of service channels (electric, fiber-optic, capillary etc.) can be placed inside or outside channels in the form of a flexible belts. Flanges located beyond the outside dimensions of an umbilical coiled tubing may have a wave-type of form. Welding seams, flanges, centers of a closed channels and partitions are located, mainly, on the middle line of an umbilical coiled tubing's cross-section. The umbilical coiled tubing makes it possible to significantly increase possibilities of coiled tubing units in technological operations as well as in artificial lift methods due to its multi-channel design and, consequently, multifunctionality.

The invention relates to long-dimensional flexible tubes (coiled tubing). There are several variants of the proposed basic pairs of an umbilical coiled tubing and include means of their production with multi-stage sequential shaping process of one or multiple strips at an estimated geometry, and where isolated channels, partitions and flanges are formed during this process. If required, longitudinal butts of an additional shaped longitude strips can be welded to them to form additional hydraulic channels of the umbilical coiled tubing which can be reeled up to a drum. Other types of service channels (electric, fiber-optic, capillary etc.) or standard coiled tubing can be placed inside or outside channels in the form of a service channels tape. Flanges located beyond the outside dimensions of an umbilical coiled tubing may have a wave-type of form. Connecting partitions may have holes intended for fingers of injector, for elevator, for service channels tape. Flanges and partition holes are weight-carrying members of umbilical coiled tubing. Welding seams, flanges, centers of a closed channels and partitions are located, mainly, on the middle line of an umbilical coiled tubing's cross-section. The umbilical coiled tubing makes it possible to significantly increase possibilities of coiled tubing units in technological operations as well as in artificial lift methods due to its multi-channel design and, consequently, multifunctionality.

The invention relates to long-dimensional flexible tubes (coiled tubing). There are several variants of the proposed basic pairs of an umbilical coiled tubing and include means of their production with multi-stage sequential shaping process of one or multiple strips at an estimated geometry, and where isolated channels, partitions and flanges are formed during this process. If required, longitudinal butts of an additional shaped longitude strips can be welded to them to form additional hydraulic channels of the umbilical coiled tubing which can be reeled up to a drum. Other types of service channels (electric, fiber-optic, capillary etc.) or standard coiled tubing can be placed inside or outside channels in the form of a service channels tape. Flanges located beyond the outside dimensions of an umbilical coiled tubing may have a wave-type of form. Connecting partitions may have holes intended for fingers of injector, for elevator, for service channels tape. Flanges and partition holes are weight-carrying members of umbilical coiled tubing. Welding seams, flanges, centers of a closed channels and partitions are located, mainly, on the middle line of an umbilical coiled tubing's cross-section. The umbilical coiled tubing makes it possible to significantly increase possibilities of coiled tubing units in technological operations as well as in artificial lift methods due to its multi-channel design and, consequently, multifunctionality.

The invention relates to a system of flexible pipes (1) and coupling elements (6) for coupling the flexible pipes. The flexible pipes each comprise an inner conduit and multiple cavities running substantially parallel over the outer surface of the inner conduit. The coupling elements each comprise an inner opening and multiple outer openings surrounding the inner opening, such that, in the coupled state, the inner conduits of adjacent flexible pipes are connected by means of the inner opening of the intermediate coupling element and the cavities of adjacent flexible pipes are connected by means of the outer openings of the intermediate coupling element. The invention further relates to a method of producing a flexible pipe as described as part of the system.

The invention relates to a system of flexible pipes (1) and coupling elements (6) for coupling the flexible pipes. The flexible pipes each comprise an inner conduit and multiple cavities running substantially parallel over the outer surface of the inner conduit. The coupling elements each comprise an inner opening and multiple outer openings surrounding the inner opening, such that, in the coupled state, the inner conduits of adjacent flexible pipes are connected by means of the inner opening of the intermediate coupling element and the cavities of adjacent flexible pipes are connected by means of the outer openings of the intermediate coupling element. The invention further relates to a method of producing a flexible pipe as described as part of the system.

A multi-lumen hose connector nipple and a multi-lumen hose equipped therewith. The multi-lumen hose connector nipple includes a nipple basic section through which a plurality of separate fluid conduits extend in each case between a first and a second nipple connector side, a plurality of hose lumen plug-in sockets integral with the nipple basic section, which sockets extend juxtaposed on the first nipple connector side with an intermediate hose lumen wall accommodation space left therebetween, wherein a socket interior space of each of the hose lumen plug-in sockets is assigned to a respective one of the fluid conduits and opens out axially, and a socket strutting structure within the socket interior space of at least one of the hose lumen plug-in sockets.

The subject matter of this specification can be embodied in, among other things, a fuel injector for a gas turbine engine includes a fuel injector housing, and an elongated fuel tube held in position in said housing by spaced apart joints and including an undulating tube surface along at least a portion of its length between said joints, said undulating tube surface being in contact with another surface disposed in said housing at one or more locations of said undulating tube surface.

The subject matter of this specification can be embodied in, among other things, a fuel injector for a gas turbine engine includes a fuel injector housing, and an elongated fuel tube held in position in said housing by spaced apart joints and including an undulating tube surface along at least a portion of its length between said joints, said undulating tube surface being in contact with another surface disposed in said housing at one or more locations of said undulating tube surface.

The invention relates to long, flexible tubing which can be wound on a spool (coiled tubing or flexible production tubing), and comprises two closed channels combined in a single structure, said channels being formed from a single strip by repeated and successive shaping and welding, and being joined to one another by a connecting, jointing or dividing partition. A connecting partition is perforated, and has mounted thereon a flexible service belt having locking connecting cams which correspond to matching locking holes on the perforated connecting partition. The service belt has electrical cables, wires, capillary tubing, and fiber optic lines arranged therein, and the interval between the connecting cams is twice the size of the interval between the holes on the perforated connecting partition. If the closed channels are joined by an jointing partition, then a pipe-in-pipe design variant is used. If the closed channels are joined by a dividing partition, then the latter also forms part of the wall of both closed channels. The dividing partition can be twice the thickness of the strip. The weld seams, the centers of the closed channels and the partition are situated on a midline of a cross section of the string, parallel to the axis of a spool. The proposed invention makes it possible to significantly increase the potential of coiled tubing units and of the coiled tubing itself by virtue of being multi-channeled and, as a result, multi-functional.