1.Bottom plug & Top Cementing Plug 2.Separate cement slurry from mud 3.Oil & acids resistance 4.heat-resisting and tough
Top/Bottom Cementing Plug For Oil Drilling/Casing Accessories
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 |
Structure features: The top plug is solid. The bottom plug is hollow. They can all be drilled out with PDC bits. The material of the plug body is acrylonitrile- butadiene rubber. It is heat-resisting and tough.
Main Parameters
Specification of Casingmm(inch) | O.D. mm(inch) | Height Top/Bottommm(inch) |
139.7(5-1/2) | 142.9(5-5/8) | 250(9-27/32) |
177.8(7) | 180.98(7-1/8) | 235/260(9-1/4/10-1/4) |
244.5(9-5/8) | 247.65(9-3/4) | 274(10-25/32) |
339.7(13-3/8) | 342.9(13-1/2) | 355(13-63/64) |
Top/Bottom Cementing Plug For Oil Drilling/Well Cementing/Casing Accessories
