Lifting top drive cement head

Details Lifting top drive cement head Lifting top drive cement head

1997-08-01

1999-09-14

Neuder, William

Wells

With below and above ground modification

Head for tool, piston or cleaner

166155, 166156, 166193, E21B 3305

Patent

active

059507241

ABSTRACT:
A subsea lifting top drive cement head in which cement flows from the top. The cement head includes lower and upper assemblies with a bore for fluid flow, and a body in sure lock connection with the lower and upper assemblies and having a dart cage to prevent a dart inside the dart cage from being washed away by the cement flow. In addition, the cement head includes a ball dropper that does not need to be retracted prior to releasing the dart.

REFERENCES:
patent: 3616850 (1971-11-01), Scott
patent: 4317486 (1982-03-01), Harris
patent: 4406485 (1983-09-01), Giebeler
patent: 4524998 (1985-06-01), Brisco
patent: 4722389 (1988-02-01), Arnold
patent: 4928520 (1990-05-01), Barrington
patent: 4995457 (1991-02-01), Baldridge
patent: 5095988 (1992-03-01), Bode
patent: 5833002 (1998-11-01), Holcombe
Subsea Cementery Equipment by SJ Services, Sep. 1994.

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