Claims
- 1. A cement head comprising:
- an upper assembly having a bore for fluid flow;
- a lower assembly having a bore for fluid flow; and
- a body connecting said upper and lower assemblies, said body having a bore, a dart cage mounted in said bore of said body, and a dart within said dart cage;
- wherein fluid flows from said upper assembly down to said body down to said lower assembly.
- 2. The cement head of claim 1, wherein said dart has a plurality of fins, and wherein said dart cage further has at least one port for allowing fluid to enter said cage and engage said fins in order to drive said dart downwardly.
- 3. The cement head of claim 1 further comprising a lift assembly connected to said upper assembly for lifting the cement head.
- 4. The cement head of claim 3, wherein said body further has a shackle ring to prevent said body from rotating while swivel lifting the cement head.
- 5. The cement head of claim 1, wherein said lower assembly has a tattle tale for detecting passage of said dart through said bore of said lower assembly.
- 6. The cement head of claim 5, wherein said tattle tale includes a lever with a first end extending into said bore of said lower assembly and a second end connected to a flag.
- 7. The cement head of claim 1, wherein said dart cage further has a cap connected to a spring holding said dart in resting position on a pin puller.
- 8. The cement head of claim 1, wherein said dart cage causes said fluid to flow around said dart cage before reaching said dart.
- 9. The cement head of claim 1 further comprising a ball dropper in a side wall of said body, said ball dropper having a ball and a ball launching device, wherein said launching device does not extend into said bore of said body after said ball is launched.
- 10. The cement head of claim 1, wherein said body is in sure lock connection with said upper and lower assemblies.
- 11. A cement head comprising:
- an upper assembly having a bore for fluid flow;
- a lower assembly having a bore for fluid flow;
- a body connecting said upper and lower assemblies, said body having a bore for fluid flow; and
- a dart cage mounted in one of said bores and a dart within said dart cage;
- wherein said dart cage prevents fluid from reaching said dart before said dart is released.
- 12. The cement head of claim 11 further comprising a ball dropper in a side wall of said body, said ball dropper having a ball and a ball launching device, wherein said launching device does not extend into said bore of said body after said ball is launched.
- 13. The cement head of claim 11, wherein said body is in sure lock connection with said upper and lower assemblies.
- 14. The cement head of claim 11, wherein said dart has a plurality of fins, and wherein said dart cage further has at least one port for allowing fluid to enter said cage and engage said fins in order to drive said dart downwardly, once said dart is released.
- 15. The cement head of claim 11 further comprising a lift assembly connected to said upper assembly for lifting the cement head.
- 16. The cement head of claim 15, wherein said body further has a shackle ring to prevent said body from rotating while swivel lifting the cement head.
- 17. The cement head of claim 11, wherein said lower assembly has a tattle tale for detecting passage of said dart through said bore of said lower assembly.
- 18. The cement head of claim 17, wherein said tattle tale includes a lever with a first end extending into said bore of said lower assembly and a second end connected to a flag.
- 19. The cement head of claim 11, wherein said dart cage further has a cap connected to a spring holding said dart in resting position on a pin puller.
Parent Case Info
This is a Continuation Application of a Provisional Application Ser. No. 60/026,449, filed on Sep. 4, 1996.
US Referenced Citations (9)
Non-Patent Literature Citations (1)
Entry |
Subsea Cementery Equipment by SJ Services, Sep. 1994. |