FIELD: sealing elements.
SUBSTANCE: invention relates to a sealing system connecting the first and the second tubular elements that contains the first curved sealing surface on the first tubular element and the second curved sealing surface on the second tubular element. Both the first and the second curved sealing surfaces are located between two sets of thread on the corresponding first and second tubular elements. When the first and the second tubular elements are in a joint configuration, the first and the second curved sealing surfaces contact and cross-interact, forming an annular curved medium seal. An auxiliary recess can be located adjacent to the first and/or the second curved sealing surfaces to accommodate the excess of lubricant between the first and the second tubular elements.
EFFECT: curved sealing system suitable for displacement or adjustment can be easier to operate and more reliable, since the medium seal can be maintained in different conditions.
20 cl, 10 dwg
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