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.