7'' Non Rotating Top Cementing Wiper Plugs
Plugs are used during cementing operations to help remove dispersed mud (drilling fluid) and mud sheath from the casing inner diameter and minimize the contamination of cement. A bottom plug is pumped ahead of the cement slurry and behind the spacer. It wipes any remaining dispersed mud from the inner diameter of the casing as it moves down the string. When the bottom plug seats at the float collar, differential pressure ruptures a diaphragm on the plug, allowing cement to flow through, turn the corner at the bottom of the hole or toe end of a horizontal well and fill the annular space between the casing and the formation. Once the full volume of cement has been pumped, a top plug is dropped and pumped behind the slurry. The top plug wipes cement from the inner diameter of the casing and then seats at the float collar, resting on the bottom plug and causing a pressure increase at the surface indicating that the cement has been displaced. Top and bottom plugs are always different colors. Bottom plugs from Halliburton are red and top plugs are black.
Non-Rotating cementing plugs that require only a tenth of the time (using PDC bits) to drill out the shoe joint. The innovative design includes plugs that have locking teeth on both the top and bottom plug and Super Seal II float collars that allow plugs and casing equipment to lock together during drill-out.
Non rotating cementing plugs also are equipped with high strength drillable plug inserts designed to withstand casing test pressures after the job is completed.
Quicker drill-out = less rig time
Oil resistant
PDC drillable
Proven five-wiper design
HPHT service available
Structure:
There are two kinds of cementing plug: conventional cementing plug and special cementing plug. Conventional cementing plug is divided into top plug and bottom plug. Special plug has top/middle/bottom plug used in two-stage cementing, drill pipe plug and hollow plug used in drilling liner cementing and composite plug used in composite casing.
Feature:
1. Special materials designed for easy drill out with PDC bits
2. Normal and non-rotating type can be available
3. The non-rotating type can save the drilling time
4. Size: 4 1/2"--20".
Specification:
| Casing size(in) |
casing weight range |
Wiper Fin O.D |
| mm |
in |
mm |
in |
| 4 1/2" |
14.14-17.26 |
9.50-11.60 |
110 |
4.331 |
| 5" |
17.11-35.86 |
11.50-24.10 |
122 |
4.803 |
| 5 1/2" |
20.83-39.88 |
14.00-26.80 |
135 |
5.315 |
| 7" |
25.30-56.55 |
17.00-38.00 |
170 |
6.693 |
| 7 5/8" |
35.72-63.69 |
24.00-42.00 |
185 |
7.283 |
| 9 5/8" |
53.57-79.62 |
36.00-53.50 |
235 |
9.252 |
| 10 3/4" |
60.27-97.77 |
40.50-65.70 |
260 |
10.236 |
| 13 3/8" |
71.43-107.15 |
48.00-72.00 |
333 |
13.110 |
| 20" |
139.89-197.93 |
94.00-133.00 |
498 |
19.606
|
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