Apparatus in which an annular ring is contained in a groove around a member to be applied to a sliding manner against the cylindrical surface of another member

摘要

The invention relates to an assembly of two coaxial tubular elements; the internal element comprises a groove or is fitted a ring of section, or else an antifriction ring. In both cases, the ring 55 comprises an annular recess or applies a retaining ring 57 closely tightened by radial deformation. According to one embodiment, the groove has a dovetail profile and the ring, a profile complementary. The present invention provides to interpose, between the ring and the concave sides of the groove, the rings anti - extrusion. The vents are provided for equalize the pressures on either side of the lips litters or of the sliding of the ring, during the operations of assembly and separation. p / p applications: the invention applies in particular has a junction sealed will between a column of tubes and the head of a wellbore.