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Bonded Seal with Expanding Cavity

IP.com Disclosure Number: IPCOM000243481D
Publication Date: 2015-Sep-24
Document File: 1 page(s) / 14K

Publishing Venue

The IP.com Prior Art Database

Abstract

A metal Insert for a Bonded Seal is constructed with two internal cavities. One cavity is exposed to pressure on one side of the Bonded Seal and the other cavity is exposed to pressure on the other side. Each cavity communicates their respective pressure to the areas just beyond the seal points so that the pressure is used to locally expand the Insert and close off the extrusion gaps Bonded Seals are used to seal tubing strings or work strings to Packer bores. An elastomer is bonded to the OD of a metal Insert and provides a bi-directional static or dynamic seal with the Packer bore. An O-ring on the ID of the Insert provides a static seal with the component that is attached to the tubing/workstring. Pressure/temperature rating of a Bonded Seal can be limited by the extrusion resistance of the bonded elastomer and the O-Ring. The concept that is proposed, provides a means of closing off those extrusion gaps under high pressure. Specifically, two internal cavities are contained in the metal Insert. One cavity is exposed to pressure on one side of the Bonded Seal and the other cavity is exposed to pressure on the other side of the Bonded Seal. The cavity exposed to pressure "above" the seal. The cavity comprises: a circumferential "hollow" near the OD of the Insert just below the bonded elastomer; a circumferential "hollow" near the ID of the Insert just below the O-Ring groove; one or more entry channels from the ID of the Insert to the outermost "hollow"; and one or more communication channels from the outermost "hollow" to the innermost "hollow". In this manner, pressure from above the seal is applied to a thin area of the metal Insert just downstream of the seal points for the bonded elastomer and O-Ring. As pressure increases, the cavity expands reducing the extrusion gap at the two seal points. The cavity exposed to pressure "below" the seal and is functionally a mirror image of that described previously. (The entry and communication channels are constructed so that pressure in the "above" cavity never communicates with the pressure in the "below" cavity.) Since the cavities near the O-Ring groove are over O-Ring lands exposed to burst at the time the cavities have low pressure inside, a series of "ribs" is provided inside those cavities to support the thin walls and prevent plastic deformation. This concept would be constructed by 3-d printing (additive manufacturing)

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Bonded Seal with Expanding Cavity

A metal Insert for a Bonded Seal is constructed with two internal cavities. One cavity is exposed to pressure on one side of the Bonded Seal and the other cavity is exposed to pressure on the other side. Each cavity communicates their respective pressure to the areas just beyond the seal points so that the pressure is used to locally expand the Insert and close off the extrusion gaps

Bonded Seals are used to seal tubing strings or work strings to Packer bores. An elastomer is bonded to the OD of a metal Insert and provides a bi-directional static or dynamic seal with the Packer bore. An O-ring on the ID of the Insert provides a static seal with the component that is attached to the tubing/workstring. Pressure/temperature rating of a Bonded Seal can be limited by the extrusion resistance of the bonded elastomer and the O-Ring. The concept that is proposed, provides a means of closing off those extrusion gaps under high pressure. Specifically, two internal cavities are contained in the metal Insert. One cavity is exposed to pressure on one side of the Bonded Seal and the other cavity is exposed to pressure on the other side of the Bonded Seal. The cavity exposed to pressure "above" the seal. The cavity comprises: a circumferential "hollow" near the OD of the Insert just below the bonded elastomer; a circumferential "hollow" near the ID of the Insert just below the O-Ring groove; one or more entry channels from the ID of the Insert to the...