초록 ▼

A unitary blade seal for a shearing blind ram of a ram-type blowout preventer is disclosed and includes an elongate member having a generally semi-circular cross section with a curved upper surface and a lower surface. The lower surface has a pair of laterally extending sides that taper outwardly an

A unitary blade seal for a shearing blind ram of a ram-type blowout preventer is disclosed and includes an elongate member having a generally semi-circular cross section with a curved upper surface and a lower surface. The lower surface has a pair of laterally extending sides that taper outwardly and have a metal outer cap bonded thereto. The metal outer caps form an acute angle that engages a complementary groove formed in the upper ram of the shearing blind ram assembly.

대표청구항 ▼

What is claimed is: 1. A ram-type blowout preventer for oil and gas drilling operations including a shearing blind ram, comprising: a body with a vertical bore; a pair of opposing bonnet assemblies laterally disposed in said body; a pair of opposing shearing blind rams laterally moveable within sai

What is claimed is: 1. A ram-type blowout preventer for oil and gas drilling operations including a shearing blind ram, comprising: a body with a vertical bore; a pair of opposing bonnet assemblies laterally disposed in said body; a pair of opposing shearing blind rams laterally moveable within said bonnet assemblies; a blade seal for sealing against an opposing shearing blind ram disposed in one of said shearing blind rams; said blade seal including a curved upper surface and a lower surface, said lower surface including a pair of laterally extending sides tapering outwardly from said lower surface, said pair of laterally extending sides each including an outer metal cap bonded to said laterally extending sides; said outer caps forming an acute angle for engagement with a complementary groove formed in said shearing blind ram; said curved upper surface extending above said outer caps; and, said blade seal is molded of rubber. 2. A shearing blind ram assembly for a ram-type blowout preventer used in oil and gas drilling operations, comprising: an upper ram and a lower ram; said upper ram and said lower ram including top seals and side seals for sealing in a guideway of a ram-type blowout preventer; a blade seal positioned on the lower face of said upper ram; said lower ram including a seal surface for engagement with said blade seal when said shearing blind ram assembly is closed; said blade seal including a generally semi-circular cross section; said generally semi-circular cross section including a curved upper surface and a lower surface, said lower surface including a pair of laterally extending sides tapering outwardly from said lower surface, said pair of laterally extending sides each including an outer metal cap bonded to said laterally extending sides; said outer caps forming an acute angle for engagement with a complementary groove formed in said shearing blind ram; said curved upper surface extending above said outer caps; and, said generally semi-circular cross section is molded of rubber. 3. A blade seal for a shearing blind ram for a ram-type blowout preventer used in oil and gas drilling operations, comprising: an elongate member having a curved upper surface and a lower surface, said lower surface including a pair of laterally extending sides tapering outwardly from said lower surface, said pair of laterally extending sides each including an outer metal cap bonded to said laterally extending sides; said outer caps forming an acute angle for engagement with a complementary groove formed in the shearing blind ram; said curved upper surface extending above said outer caps; and, said elongate member is molded of rubber. 4. A blade seal for a shearing blind ram for a ram-type blowout preventer used in oil and gas drilling operations, comprising: an elongate member comprising a curved front surface and a rear surface, said rear surface comprising a pair of laterally extending sides tapering outwardly from said rear surface; a metal retainer disposed along each of said laterally extending sides, said retainers and said elongate member being integrally formed together as one piece; said retainers forming an acute angle for engagement with a complementary groove formed in the shearing blind ram; said curved front surface extending past said retainers; and, said elongate member is molded of rubber. 5. A ram-type blowout preventer for oil and gas drilling operations including a shearing blind ram, comprising: a body with a vertical bore; a pair of opposing bonnet assemblies laterally disposed in said body; a pair of opposing shearing blind rams laterally moveable within said bonnet assemblies; a blade seal for sealing against an opposing shearing blind ram disposed in one of said shearing blind rams; said blade seal comprising a curved front surface and a rear surface, said rear surface comprising a pair of laterally extending sides tapering outwardly from said rear surface; a metal retainer disposed along each of said laterally extending sides, said retainers and said blade seal being integrally formed together as one piece; said retainers forming an acute angle for engagement with a complementary blade seal support formed in the shearing blind ram; said curved front surface extending past said retainers; said blade seal being slidable into said blade seal support in said shearing blind ram; and, said blade seal is molded of rubber. 6. A ram-type blowout preventer for oil and gas drilling operations including a shearing blind ram, comprising: a body with a vertical bore; a pair of opposing bonnet assemblies laterally disposed in said body; a pair of opposing shearing blind rams laterally moveable within said bonnet assemblies; a blade seal configured to seal against an opposing shearing blind ram and disposed in one of said shearing blind rams; said blade seal comprising a front engagement surface and a rear surface, said rear surface comprising a pair of laterally extending sides tapering outwardly from said rear surface; a metal retainer disposed along at least a portion of each of said laterally extending sides, said retainers and said blade seal being integrally formed together as one piece; said retainers forming an acute angle for engagement with a complementary blade seal support formed in the shearing blind ram; and said front engagement surface extending past said retainers. 7. A ram-type blowout preventer for oil and gas drilling operations including a shearing blind ram according to claim 6, wherein said blade seal is disposed in a dove-tail type groove. 8. A ram-type blowout preventer for oil and gas drilling operations including a shearing blind ram according to claim 6, wherein at least one of said retainers covers a substantial portion of a side surface of said blade seal. 9. A blade seal for a shearing blind ram for a ram-type blowout preventer used in oil and gas drilling operations, comprising: an elongate member comprising a curved engagement surface and a second surface generally opposite the engagement surface, said second surface comprising a pair of laterally extending sides tapering outwardly from said rear surface, said pair of laterally extending sides each comprising an outer metal cap bonded to said laterally extending sides; said outer caps forming an acute angle for engagement with a complementary groove formed in said shearing blind ram; said curved engagement surface extending above said outer caps; and, said elongate member is molded of rubber. 10. A blade seal for a shearing blind ram for a ram-type blowout preventer used in oil and gas drilling operations according to claim 9, wherein at least one of said outer caps covers a substantial portion of a side surface located between the engagement surface and the second surface.