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Conventional/Standard and Non-Rotational Cementing Plugs

Cementing plugs are used to remove the mud during cementing operations. Top cementing plugs and bottom cementing plugs are used in the cementing process. The top and bottom cementing plus general have different colors (bottom plugs are red and top plugs are black) in production for easy usage in operation.

The top cementing plug has a solid body that provides positive indication of contact with cementing floating collar and bottom plug through an increase in pump pressure.

The bottom cementing plug with a hollow body is installed ahead of the cement slurry to minimize contamination by fluids inside the casing prior to cementing.

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A set of non-rotational top and bottom cementing plugs on white background.


The cementing plugs are divided into standard (conventional) cementing plugs and non-rotating cementing plugs, you can choose the right cementing plugs according to the floating equipment.

  • A drawing of conventional top and bottom cementing plug


  • A drawing of non-rotating cementing plug


Conventional (Standard) Cementing Plugs

A drawing shows the single valve cement float shoe and collar CP-01-CS

Conventional/Standard Cementing Plug


Conventional top and bottom cementing plugs significantly reduce the drill out time to save cost. The bottom plug separates the cement from drill mud and features a rubber diaphragm which is opened once the plug has landed and latched into the conventional cementing float collar.

The top cementing plug is used as a floow-up plug to displace cement to provide a anti-rotational feature to eliminate rotation during drilling and save drill out time when it is latched into the upper end of the bottom plug.

Performance feature

  • Aim to reduce the drill out time and save cost.
  • Top plugs are used as a fllow plug to displace the cement and land on the upper end of the bottom plug.
  • The body consists of ebonite inserted molded with elastomer, which is easy to fracture than the rubber and aluminum structure, thus reducing the drill out time significantly.
  • No metal parts are used therefore the plugs are PDC drillable.


  • Available in sizes from 4-1/2" to 20"
  • Available in NR, SBR, NBR and HNBR grades.

Non-Rotating Cementing Plugs

A drawing of non-rotating cementing plug CP-02-NR

Non-Rotational Cementing Plug


Non-rotating cementing plugs are designed to decrease the drill out times. Reinforced locking teeth are built into the plugs, which lock together between the plug and the float equipment to eliminate rotation of the plug during drill out. The top cementing plug are latched to the anti-rotational float collar.

Performance features

  • Non-rotational.
  • Decrease drill out time.
  • PDC drillable.


  • Available in sizes from 4-1/2" to 20".
  • Available in NR, SBR, NBR and HNBR grades.


Popular Specifications of Cementing Plugs
Casing size Casing weight range O.D. of Rubber Cup Working Temperature Working Pressure Burst Pressure Hardness
inch kg/m lb/ft mm inch MPa MPa
4-1/2 14.14–17.26 9.50–11.60 110 4.331 -30 °C to 150 °C ≥15 1–2 75–95
5 17.11–35.86 11.50–24.10 122 4.803 -30 °C to 150 °C ≥15 1–2 75–95
5-1/2 20.83–39.88 14.00–26.80 135 5.315 -30 °C to 150 °C ≥15 1–2 75–95
7 25.30–56.55 17.00–38.00 170 6.693 -30 °C to 150 °C ≥15 1–2 75–95
7-5/8 35.72–63.69 24.00–42.80 185 7.283 -30 °C to 150 °C ≥15 1–2 75–95
9-5/8 53.57–79.62 36.00–53.50 235 9.252 -30 °C to 150 °C ≥15 1–2 75–95
10-3/4 60.27–97.77 40.50–65.70 260 10.236 -30 °C to 150 °C ≥15 1–2 75–95
13-3/8 71.43–107.15 48.00–72.00 333 13.110 -30 °C to 150 °C ≥15 1–2 75–95
20 139.89–197.93 94.00–133.00 498 19.606 -30 °C to 150 °C ≥15 1–2 75–95

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