Well control sealing system
A blowout preventer includes a main body having a through bore and defining a passage transverse to the through bore. A seal is disposed in the main body and arranged to restrict fluid flow from the through bore to the passage. The seal comprises a seal body formed as a closed loop having an upper surface and a lower surface, wherein the seal body comprises an inner wall and an outer wall. The lower surface comprises at least one wing extending laterally from the outer surface to provide a lateral sealing surface. The upper surface comprises at least one raised portion to provide a sealing surface.
1. A blowout preventer (BOP), comprising:
a main body having a through bore, the main body defining a passage transverse to the through bore;
a seal disposed in the main body and arranged to restrict fluid flow from the through bore to the passage, the seal comprising,
a seal body formed as a closed loop having an upper surface and a lower surface,
wherein the seal body comprises an inner wall and an outer wall,
wherein the lower surface comprises at least one wing extending laterally from the outer surface to provide a lateral sealing surface, and
wherein the upper surface comprises at least one raised portion to provide a sealing surface;
the seal mounted within a channel on an insert disposed in the main body with the raised portion facing the passage,
wherein the raised portion is configured to engage a surface of an object in the passage;
wherein the channel is in fluid communication with a source of fluid pressure in a space of the channel below the seal.
2. The BOP of claim 1 wherein at least one of the inner wall and the outer wall comprises a relief, and wherein a reinforcement is disposed in the relief.
3. The BOP of claim 2 wherein the reinforcement is made from a material having a lower resilience than a material used to form the seal body.
4. The BOP of claim 2 wherein the reinforcement comprises a spring.
5. The BOP of claim 1 further comprising at least one reinforcement ring formed in the seal body.
6. The BOP of claim 5 further comprising two reinforcement rings disposed in the seal body.
7. The BOP of claim 1 wherein the seal lower surface comprises an inner wing and an outer wing extending laterally from the outer surface.
8. The BOP of claim 7 further comprising an O-ring disposed in a recess disposed between the inner wing and the outer wing.
9. The BOP of claim 1 wherein an edge of the channel comprises a sloped surface to communicate fluid pressure in the passage to the space of the channel below the seal.
10. The BOP of claim 1 further comprising a ring cutter disposed in the passage, wherein the seal is configured to engage a face of the ring cutter.
11. The BOP of claim 1 , wherein the insert comprises:
a first insert segment;
a second insert segment; and
wherein the seal is disposed on one of the first insert segment or second insert segment.
12. The BOP of claim 11 wherein the first and second insert segments each comprise a seal disposed thereon.
13. A method for operating a blowout preventer (BOP), the BOP comprising a main body having a through bore, the main body defining a passage transverse to the through bore, the BOP comprising a seal disposed in the main body, the seal comprising a seal body formed as a closed loop having an upper surface and a lower surface, wherein the seal body comprises an inner wall and an outer wall, wherein the lower surface comprises at least one wing extending laterally from the outer surface to provide a lateral sealing surface, and wherein the upper surface comprises at least one raised portion to provide a sealing surface; the seal disposed in a channel of an insert in the main body with the raised portion facing the passage, wherein the raised portion is configured to engage a surface of an object in the passage, the method comprising:
applying fluid pressure to the seal in a space of the channel below the seal to energize the seal to restrict fluid flow from the through bore to the passage.
14. The method of claim 13 wherein applying fluid pressure comprises actuating a charge.
15. The method of claim 13 wherein applying fluid pressure comprises fluid pressure originating from a pressurized container.
16. A blowout preventer (BOP), comprising:
a main body having a through bore;
an insert disposed in the main body;
the insert defining a passage transverse to the through bore;
at least one seal disposed within a channel on the insert; and
the at least one seal comprising a seal body formed as a closed loop having an upper surface facing the transverse passage,
wherein the upper surface is configured to engage a surface of an object in the passage;
wherein the channel is in fluid communication with a source of fluid pressure in a space of the channel below the at least one seal.
17. The BOP of claim 16 , wherein the at least one seal is configured for energization to engage the upper surface with the surface of the object in the passage.
18. The BOP of claim 16 wherein the insert comprises:
a first insert segment having a first seal formed as a closed loop disposed within a channel thereon;
the first seal configured with an upper surface facing the transverse passage to engage a first surface of the object in the passage;
a second segment having a second seal formed as a closed loop disposed within a channel thereon;
the second seal configured with an upper surface facing the transverse passage to engage a second surface of the object in the passage.
19. The BOP of claim 18 , wherein each of the first and second seals are configured for energization to respectively engage the seal upper surfaces with the first and second surfaces of the object in the passage.