Best top and bottom Cementing plugs in China
The cementing plugs are parts of the cementing tool. They are used to separate the cement slurry from other fluids, reducing contamination and maintaining predictable slurry performance.
Two types of cementing plugs 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 a positive indication of contact with the landing collar and bottom plug through an increase in pump pressure.
| Casing Size (in) | Casing Weight Range (mm) | Casing Weight Range (in) | Wiper Fin O.D (mm) | Wiper Fin O.D (in) | Working Temperature | Working Pressure | Burst Pressure | Hardness |
|---|---|---|---|---|---|---|---|---|
| 4 1/2″ | 14.14 ~ 17.26 | 9.50 ~ 11.60 | 110 | 4.331 | – 30℃ ~ 150℃ | ≥15MP | 1MP ~ 2MP | 75 ~ 95 |
| 5″ | 17.11 ~ 35.86 | 11.50 ~ 24.10 | 122 | 4.803 | – 30℃ ~ 150℃ | ≥15MP | 1MP ~ 2MP | 75 ~ 95 |
| 5 1/2″ | 20.83 ~ 39.88 | 14.00 ~ 26.80 | 135 | 5.315 | – 30℃ ~ 150℃ | ≥15MP | 1MP ~ 2MP | 75 ~ 95 |
| 7″ | 25.30 ~ 56.55 | 17.00 ~ 38.00 | 170 | 6.693 | – 30℃ ~ 150℃ | ≥15MP | 1MP ~ 2MP | 75 ~ 95 |
| 7 5/8″ | 35.72 ~ 63.69 | 24.00 ~ 42.00 | 185 | 7.283 | – 30℃ ~ 150℃ | ≥15MP | 1MP ~ 2MP | 75 ~ 95 |
| 9 5/8″ | 53.57 ~ 79.62 | 36.00 ~ 53.50 | 235 | 9.252 | – 30℃ ~ 150℃ | ≥15MP | 1MP ~ 2MP | 75 ~ 95 |
| 13 3/8″ | 71.43 ~ 107.15 | 48.00 ~ 72.00 | 333 | 13.11 | – 30℃ ~ 150℃ | ≥10MP | 1MP ~ 2MP | 75 ~ 95 |
| 20″ | 139.89 ~ 197.93 | 94.00 ~ 133.00 | 498 | 19.606 | – 30℃ ~ 150℃ | ≥10MP | 1MP ~ 2MP | 75 ~ 95 |
- Cementing plugs are manufactured of graded rubber that is fused upon a composite or Aluminum core.
- Cementing plugs are completely PDC drillable.
- The operating range of temperature with Aluminum core is up to 200 degrees.
- The plug can be ordered for higher operating temperatures and operation in either synthetic or mud fluids.
- Available in 4 1/2″ to 20 “sizes + any special sizes.
- Conventional and non-rotating type are available.
- The non-rotating type can save the drilling time
Cementing plug is used to remove the mud during cementing operations. separate the cement slurry from other fluids, reducing contamination and maintaining predictable slurry performance.
Our cementing plugs are specially designed with positive wiping action to ensure that the casing is clean.
The top cementing plugs are designed to exert continuous pressure on the casing wall.
The fins and tail section of bottom plugs provide positive wiping action. Fins also serve as a seal while cementing. A rubber diaphragm at the top of bottom plugs ruptures after the plug is seated allowing the cement to flow through
Two types of cementing plugs are used in the cementing process, bottom cementing plug and top cementing plug.
The top cementing plug has a solid body that provides a positive indication of contact with the landing collar and bottom plug through an increase in pump pressure.
1) The structure
The core is made of nylon or aluminum or phenolic resins, depending on the application and well conditions. The plug is made of high-performance materials–nitrile rubber.
2) Using Method:
Place bottom plug before injecting cement, and pump the scrape to clean the well-wall. Build the pressure of 2-4MPa till the rubber diaphragm is broken, and thus circulation is formed. Then inject the cement, place the top plug, pump, set the pressure, and well cementation comes to an end.
