Tandem seal device for flow line applications
AssigneeCorrosion Control Corp.
InventorThomas C. Wallace
Life of this patent
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Abstract
A tandem seal device is provided for interposing and compressing between joined pieces of pipe in a flow line to prevent fluid leakage therebetween. The tandem seal device comprising a retainer body having an inner pair and an outer pair of continuous grooves. A first pair of seal elements, fabricated from a first material, being disposed in the inner pair of grooves. A second pair of seal elements, fabricated from a second material, being disposed in the outer pair of grooves.
Claims34
A tandem seal device for interposing and compressing between joined pieces of pipe in a flow line that is operative for a fluid to flow therethrough without fluid leakage therebetween, comprising:
- (a) a retainer body having opposite first and second surfaces and a central opening extending axially therethrough to allow the flow of fluid through said retainer body, said retainer body including an inner pair of continuous grooves and an outer pair of continuous grooves with said inner pair of continuous grooves being radially spaced closer to the central opening than said outer pair of continuous grooves, each one of said grooves being formed into a respective one of the first and second surfaces in spaced-apart surrounding relation to the opening, each one of said outer grooves being formed into a respective one of the first and second surfaces in spaced-apart surrounding relation to the respective one of said inner pair of continuous grooves;
- (b) a first pair of seal elements fabricated from a selected first material, there being one of said first pair of seal elements disposed within each of said inner grooves;
- and
- (c) a second pair of seal elements fabricated from a selected second material different from said selected first material, there being one of said second pair of seal elements disposed within each of said outer grooves, said first pair of seal elements and said second pair of seal elements operative to be compressed from a relaxed state to a compressed state when interposed and compressed between joined pieces of pipe thereby sealing between the joined pieces.
A tandem seal device for interposing and compressing between joined pieces of pipe in a flow line that is operative for a fluid to flow therethrough without fluid leakage therebetween, comprising:
- (a) an annular retainer body having opposite flat first and second surfaces and a central annular opening extending axially therethrough to allow the fluid to flow through said annular retainer body, said annular retainer including an inner pair of circumferential grooves and an outer pair of circumferential grooves spaced radially from said inner pair of circumferential grooves, each one of said inner grooves being formed into a respective one of the first and second surfaces to concentrically surround in a spaced-apart relation to the annular opening, each one of said outer grooves being formed into a respective one of the first and second surfaces to concentrically surround in a spaced-apart relation to the respective one of said inner pair of circumferential grooves;
- (b) a first pair of annular seal elements fabricated from a selected first material, there being one of said first pair of annular seal elements disposed within each of said inner grooves;
- and
- (c) a second pair of annular seal elements fabricated from a selected second material different from said first materisl, there being one of said second pair of annular seal elements disposed within each of said outer grooves, said first pair of annular seal elements and said second pair of annular seal elements operative to be conpressed from a relaxed state to a compressed state when interposed and compressed between joined pieces of pipe thereby sealing between the joined pieces.
A tandem seal device for interposing and compressing between joined pieces of pipe in a flow line that is operative for fluid to flow therethrough without fluid leakage therebetween, comprising:
- (a) a retainer body having opposite first and second surfaces and a central opening extending axially therethrough to allow the flow of fluid through said retainer body, said retainer body including an inner pair of continuous grooves and an outer pair of continuous grooves with said inner pair of continuous grooves being radially spaced closer to the central opening than said outer pair of continuous grooves, each one of said inner grooves being formed into a respective one of the first and second surfaces in spaced-apart surrounding relation to the opening, each one of said outer grooves being formed into a respective one of the first and second surfaces in spaced-apart surrounding relation to the respective one of said inner pair of continuous grooves;
- (b) a first pair of seal elements fabricated from a selected first material, there being one of said first pair of seal elements disposed within each of said inner grooves;
- and
- (c) a second pair of seal elements fabricated from a selected second material different from said selected first material, there being one of said second pair of seal elements disposed within each of said outer grooves, wherein one of said first and second pairs of seal elements includes a polymeric structure having a spring member disposed within said polymeric structure, said spring member fabricated from a corrosion-resistant material, said first pair of seal elements and said second pair of seal elements operative to be compressed from a relaxed state to a compressed state when interposed and compressed between the joined pieces of pipe thereby sealing between the joined pieces.
Dependencies are inferred from the claim text.