NOVELTY - Procedure for the extraction of helium-enriched fraction from a fraction (I) containing methane, nitrogen and helium (1) comprises: e.g. (a) relaxing and separating the fraction (I) to a helium-rich, methane and nitrogen containing gas fraction (II) and a liquid fraction (III) containing methane and nitrogen (7); (b) relaxing and separating the liquid fraction (III) to a nitrogen-rich gas fraction (8) and a methane-rich liquid fraction (17); (c) cooling and partially condensing the gas fraction (II); (d) separating the partially condensed gas fraction (II) to a helium-enriched gas fraction.    USE - The procedure deals with the extraction of helium-enriched fraction from a fraction (I) containing methane, nitrogen and helium (1), e.g. a liquified natural gas product.    ADVANTAGE - The procedure provides a fraction of higher helium yield, preferably with a helium yield of 96-99.9% and with very less amount of methane concentration.    DETAILED DESCRIPTION - Procedure for the extraction of helium-enriched fraction from a fraction (I) containing methane, nitrogen and helium (1), e.g. a liquified natural gas product, comprises: (a) relaxing and separating the fraction (I) to a helium-rich, methane and nitrogen containing gas fraction (II) and a liquid fraction (III) containing methane and nitrogen (7); (b) relaxing and separating the liquid fraction (III) to a nitrogen-rich gas fraction (8) and a methane-rich liquid fraction (17); (c) cooling and partially condensing the gas fraction (II); (d) separating the partially condensed gas fraction (II) to a helium-enriched gas fraction and a nitrogen/methane-rich liquid fraction; and (e) relaxing and evaporating the nitrogen/methane-rich liquid fraction in the indirect heat exchange with the partially condensed fraction (II).    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the procedure step for the extraction of helium-enriched fraction, in which four equilibrium steps carried out by the separator D1 to D4, are provided.    Fraction containing methane, nitrogen and helium (1)    Conductors (2)    Liquid fraction containing methane and nitrogen (7)    Nitrogen-rich gas fraction (8)    Methane-rich liquid fraction. (17)