A subterranean wellbore assembly includes an outer cylindrical wall and an inner cylindrical wall cooperatively defining an annular space. A seal assembly is disposed within the annular space. The seal assembly includes chevron seals. Each chevron seal includes a central portion and two axially and
A subterranean wellbore assembly includes an outer cylindrical wall and an inner cylindrical wall cooperatively defining an annular space. A seal assembly is disposed within the annular space. The seal assembly includes chevron seals. Each chevron seal includes a central portion and two axially and radially extending wing portions. Chevron seals may be of polymeric PEEK material or of nickel based material. Other seal assemblies may be arranged in the annular space in place of the seal assembly.
대표청구항▼
1. A subterranean assembly which comprises: (a) a generally cylindrical assembly which includes inner and outer generally concentric walls which define an annular space between them, and(b) an annular seal assembly with at least one chevron seal which is made of metal or metal alloy, the chevron sea
1. A subterranean assembly which comprises: (a) a generally cylindrical assembly which includes inner and outer generally concentric walls which define an annular space between them, and(b) an annular seal assembly with at least one chevron seal which is made of metal or metal alloy, the chevron seal including an annular central body and two annular wings extending radially and axially from the central body, one of the wings extending radially inwardly from the body to a distal annular end for sealing engagement with the generally cylindrical inner wall of the cylindrical assembly, the other wing extending radially outwardly from the body to another distal annular end and being arranged for sealing engagement with the generally cylindrical outer wall of the cylindrical assembly,in which the chevron seal has an unrestrained radial extent between the distal annular ends of the inner and outer wings which is greater than a radial extent of the annular space between the inner and outer walls of the cylindrical assembly so that the inner and outer wings are deflected towards one another and resiliently spring loaded against the inner and outer walls respectively. 2. The subterranean assembly as set forth in claim 1, including another chevron seal, the another chevron seal includes an annular central body and two annular wings extending radially and axially from the central body of the another chevron seal, one of the wings of the another chevron seal extends radially inwardly from its respective central body to a distal annular end for sealing engagement with the generally cylindrical inner surface, the other wing of the another chevron seal extends radially outwardly from its respective central body to a distal annular end for sealing engagement with the generally cylindrical outer surface, and the another chevron seal is of polymeric material. 3. The subterranean assembly as set forth in claim 2, including an annular scraper ring longitudinally aligned with the chevron seal. 4. The subterranean assembly as set forth in claim 3, in which the scraper ring includes inner and outer conical surfaces extending between axially separated distal ends, a juncture of the inner conical surface and one of the scraper ring distal ends defining an inner annular scraper for engagement with the generally cylindrical inner surface, and a juncture of the outer conical surface and the other of the scraper ring distal ends defining an outer annular scraper arranged for engagement with the generally cylindrical outer conical surface. 5. The subterranean assembly as set forth in claim 3, including an annular scraper ring retainer, the scraper ring and the scraper ring retainer each including two annular wings extending radially and axially from a central body, the scraper ring retainer further including a central ring radially intermediate the scraper ring retainer wings, the scraper ring retainer central ring projecting axially against the scraper ring central body, and the scraper ring retainer wings projecting both axially and radially against the scraper ring wings. 6. The subterranean assembly as set forth in claim 2, in which the central body of the polymeric chevron ring is nested within the wings of the metal chevron seal. 7. The subterranean assembly as set forth in claim 6, in which the central body of the polymeric chevron ring is substantially adjacent the central body of the metal chevron seal. 8. The subterranean assembly as set forth in claim 6, in which a major portion of the material of both wings of the polymeric chevron seal is disposed between the wings of the metal chevron seal. 9. The subterranean assembly as set forth in claim 1, including an annular spacer ring longitudinally aligned with the chevron seal central body. 10. The subterranean assembly as set forth in claim 9, in which the spacer ring is of metal or metal alloy and is of integral unitary construction with the chevron seal. 11. The subterranean assembly as set forth in claim 1, in which the inner metal chevron wing extends in substantially a straight line from the region of the wing adjacent the central body to the distal annular end and the outer metal chevron wing extends in substantially a straight line from the region of the wing adjacent the central body to the another distal annular end. 12. The subterranean assembly as set forth in claim 11, in which the thickness of each metal chevron wing is substantially uniform from the region of the wing adjacent the central body to the free distal end. 13. The subterranean assembly as set forth in claim 12, in which the thickness of the central body of the metal chevron seal is greater than the thickness of the wings. 14. The subterranean assembly as set forth in claim 1, including still another metal chevron ring. 15. The subterranean assembly as set forth in claim 14, including still another polymeric chevron ring. 16. The subterranean assembly as set forth in claim 15, in which the wings of the metal chevron seal extend axially in the same direction as the wings of the other metal chevron seal. 17. The subterranean assembly as set forth in claim 15, in which the wings of the metal chevron seal extend axially in the opposite direction as the wings of the other metal chevron seal. 18. The subterranean assembly as set forth in claim 1, in which the annular seal assembly is assembled in the annular space between the inner and outer concentric walls. 19. The subterranean assembly as set forth in claim 18, which is a wellbore assembly. 20. An annular scraper ring and an annular scraper ring retainer for an assembly, the assembly having generally cylindrical inner and outer generally concentric surfaces and an annular space between the surfaces, and the scraper ring and the scraper ring retainer comprising: each of the scraper ring and the scraper retainer ring including two annular wings extending radially and axially from a central body,the scraper ring retainer further including a central ring intermediate its annular wings, the scraper ring retainer central ring protecting axially against the scraper ring central body, and the scraper ring retainer wings projecting both axially and radially against the scraper ring wings, andthe scraper ring wings each including a cut out portion facing radially away from the other scraper ring wing, and the scraper ring retainer wings each projecting into one of the cut out portions. 21. The scraper ring and the scraper ring retainer as set forth in claim 20, in which the scraper ring wings each further include a scraper extending radially beyond the outer peripheral extent of its adjacent scraper retainer wings. 22. The scraper ring and the scraper ring retainer as set forth claim 20, in which the scraper ring is of polymeric material and the scraper ring retainer is of metal or metal alloy.
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이 특허에 인용된 특허 (11)
Gunderson ; Richard H. ; Ilfrey ; William T., Annular seal.
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