Seal holder and method for sealing a bore

摘要

A seal holder for retaining a sealing arrangement (119,121), said sealing arrangement (119,121) being adapted to seal against a facing seal surface (209) in a bore (203), said seal holder having an intermediate section (117a) encircled by a peripheral section (117b) arranged for carrying said seal arrangement (119,121), wherein said intermediate section (117a) is convex shaped towards the pressure side and is adapted to exert radial pressure on said peripheral section (117b) in the event of exposure to pressure on its convex side. The invention also relates to a method for sealing a bore by applying an apparatus equipped at its lower end with a seal holder (117) retaining a sealing arrangement (119,121).

主权项

1. A seal holder for retaining a sealing arrangement, said sealing arrangement being adapted to seal against a facing seal surface in a bore, wherein a pressure side is on one axial side of the sealing arrangement, said seal holder comprising:
an intermediate section encircled by a peripheral section arranged for carrying said sealing arrangement, the intermediate section having an axial extension within the peripheral section, the axial extension entirely closing an area within the peripheral section the intermediate section and the peripheral section being monolithic; wherein said intermediate section exerts a radial sealing force on said peripheral section in an event of exposure to pressure on the pressure side of the intermediate section, as the pressure side of the intermediate section is convex shaped towards the pressure side and bends when exposed to said pressure; wherein the intermediate section is arranged radially within the peripheral section and at the same axial position as the peripheral section; wherein the peripheral section is part of an axially extending cylindrical hollow body; and wherein the axially extending cylindrical hollow body extends axially beyond the axial extension of the intermediate section at both axial sides of the axial extension.