1 cementing plug for oil drilling
2 Bottom plug & Top plug
3 oil & acids resistance
4 Casing available 3 1/2"--20"
cementing plug for oil drilling
A rubber plug used to separate the cement slurry from other fluids, reducing contamination and maintaining predictable slurry performance. Two types of cementing plug are typically used on a cementing operation. The bottom plug is launched ahead of the cement slurry to minimize contamination by fluids inside the casing prior to cementing. A diaphragm in the plug body ruptures to allow the cement slurry to pass through after the plug reaches the landing collar. The top plug has a solid body that provides positive indication of contact with the landing collar and bottom plug through an increase in pump pressure.
Bottom plug (Pumpdown plug) & Top plug (Liner wiper plug)
*normal style * anti-rotary style
BOTTOM PLUG (PUMPDOWN PLUG )
Specifications ( mm) | 177.8/139.7 | 127.0/114.3 | 101.6 | 88.9 |
Max O.D. of Guide Head (mm) | 59 | 47 | 40 | 37 |
Length of Pumpdown Plug (mm) | 308 | 303 | 233 | 233 |
TOP PLUG (LINER WIPE PLUG)
Specifications (mm) | 177.8 | 139.7 | 127/ 114.3 | 101.6 | 88.9 |
Shearing Pressure ( MPa) | 12 | 12 | 12 | 12 | 12 |
I.D. of Wiper plug (mm) | 55 | 50 | 42 | 35 | 32 |
Back-pressure (MPa) | 25 | 25 | 25 | 25 | 25 |
