A wireline-assisted coiled-tubing portion is arranged to be lowered into a well in a ground. The wireline-assisted coiled-tubing portion comprises a coiled-tubing portion, the coiled-tubing portion in its entirety being arranged to be lowered into the well; and a wire which is attached to an, in the position of application, upper portion of the coiled-tubing portion, the wire extending from the coiled-tubing portion to the opening of the well at a surface, and the wire being arranged to transmit electrical energy and electrical signals. The coiled tubing portion, in its upper portion, is provided with an upper activatable sealing element arranged to seal an annulus between the coiled-tubing portion and the well; in its upper portion, is provided with at least one opening connecting the interior of the coiled-tubing portion to the surroundings of the coiled-tubing portion; in a lower portion, is provided with an activatable sealing element arranged to seal an annulus between the coiled-tubing portion and the well, the sealing element creating a lower zone below the sealing element; and in its lower portion, is provided with a tool allowing fluid flow-through so that the lower zone may be in fluid communication with the annulus through the tool, the interior of the coiled-tubing portion and the opening. A method for the controlled conveyance of a fluid in a well, and a use of a coiled-tubing portion are described as well.