An assembly suitable for use in a Christmas tree used with coiled tubing and other wellhead components, said assembly comprising: • a housing having an exterior surface, a first end having an inlet channel and a second end having an outlet channel, said inlet and outlet channels being connected by a central flow passage for providing of fluid communication between a well and said Christmas tree, said first end being connectable to a well being positioned below a connector, said housing further comprising a side-entry bore for providing fluid communication between said central flow passage and the external of said housing; Characterized in that • a hanger tool (30, 12, 13 14), being positioning in a well tubular below said side entry bore and supporting a coiled tubing, said hanger tool being provided with two separate fluid passages, a first fluid passage communicating with said coiled tubing and a second fluid passage communicating with the annulus between said coiled tubing and said well tubular; • an upper assembly (53,95,40, 71,72) to be inserted through the side entry bore; • a tubular stinger tool having an upper section and a lower section, the lower section having a portion adapted to be inserted into the hanger tool and the upper section having a portion being adapted for connection with said upper assembly to be inserted through said housing. • the hanger tool and the stinger tool being mutually adapted such that said first fluid passage is being extended through the stinger to the upper section of said tubular stinger and said second fluid passage is being extended by the annulus created between said tubular stinger tool and said hanger tool, the upper assembly and the upper section of the tubular stinger being mutually adapted such that said first fluid passage is being further extended to the external of said housing and said second fluid passage is being further extended to the second end of the housing. • a housing having an exterior surface, a first end having an inlet channel and a second end having an outlet channel, said inlet and outlet channels being connected by a central flow passage for providing of fluid communication between a well and said Christmas tree, said first end being connectable to a well being positioned below a connector, said housing further comprising a side-entry bore for providing fluid communication between said central flow passage and the external of said housing; Characterized in that • a hanger tool (30, 12, 13 14), being positioning in a well tubular below said side entry bore and supporting a coiled tubing, said hanger tool being provided with two separate fluid passages, a first fluid passage communicating with said coiled tubing and a second fluid passage communicating with the annulus between said coiled tubing and said well tubular; • an upper assembly (53,95,40, 71,72) to be inserted through the side entry bore; • a tubular stinger tool having an upper section and a lower section, the lower section having a portion adapted to be inserted into the hanger tool and the upper section having a portion being adapted for connection with said upper assembly to be inserted through said housing. • the hanger tool and the stinger tool being mutually adapted such that said first fluid passage is being extended through the stinger to the upper section of said tubular stinger and said second fluid passage is being extended by the annulus created between said tubular stinger tool and said hanger tool, the upper assembly and the upper section of the tubular stinger being mutually adapted such that said first fluid passage is being further extended to the external of said housing and said second fluid passage is being further extended to the second end of the housing.