CEMENTING PLUGS
CONVENTIONAL CEMENTING PLUG, CEMENTING TOOLS, CASING BUOYANCY SYSTEM PART, TOP OR BOTTOM , ANTI ROTATION
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.
ADVANTAGES AND MAIN FEATURES
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 features
› 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.
Options
› Available in sizes from 4-1/2" to 20"
› Available in NR, SBR, NBR and HNBR grades.
| Casig size inch |
Casing weight range |
O.D. of rubber cup |
Working Temperature |
Working pressure mpa |
burst pressure mpa |
hardness |
| 4-1/2. |
14.14-17.26 kg/m |
9.5-11.6 lb/ft |
110mm |
4.331inch |
(-30℃-150℃) |
≥15mpa |
1-2mpa |
75-95 |
| 5 |
17.11-35.86 kg/m |
11.5-24.1 lb/ft |
122mm |
2.803inch |
(-30℃-150℃) |
≥15mpa |
1-2mpa |
75-95 |
| 5-1/2. |
20.83-39.88 |
14-26.8 |
135 |
5.315 |
(-30℃-150℃) |
≥15mpa |
1-2mpa |
75-95 |
| 7 |
25.3-56.55 |
17-28 |
170 |
6.693 |
(-30℃-150℃) |
≥15mpa |
1-2mpa |
75-95 |
| 7-5/8. |
35.72-63.69 |
24-42.8 |
185 |
7.283 |
(-30℃-150℃) |
≥15mpa |
1-2mpa |
75-95 |
| 9-5/8. |
53.57-79.62 |
36-53.5 |
235 |
9.252 |
(-30℃-150℃) |
≥15mpa |
1-2mpa |
75-95 |
| 10-3/4. |
60.27-97.77 |
40.5-65.7 |
260 |
10.236 |
(-30℃-150℃) |
≥15mpa |
1-2mpa |
75-95 |
| 13-3/8. |
71.43-107.15 |
48-72 |
333 |
13.110 |
(-30℃-150℃) |
≥15mpa |
1-2mpa |
75-95 |
| 20 |
139.89-197.93 |
94-133 |
498 |
19.606 |
(-30℃-150℃) |
≥15mpa |
1-2mpa |
75-95 |
|
