Bridge Plugs
A bridge plug is a downhole isolation tool set permanently in the casing string to provide a pressure-tight barrier between intervals above and below it. Unlike a production packer, a bridge plug has no flow path — it seals the wellbore completely. Bridge plugs are used to abandon depleted or unwanted zones, provide a foundation for cement plugs, or isolate lower wellbore intervals during workover operations.
What a Bridge Plug Does
The bridge plug is set at the required depth and provides bidirectional pressure isolation — it holds pressure from above and below. Once set, it remains in place as a permanent mechanical barrier. If the isolated zone needs to be accessed again, the bridge plug is milled out.
Bridge plugs are commonly used to:
- Abandon a depleted or watered-out zone below an upper producing interval
- Provide a foundation for a cement plug in plug and abandon (P&A) operations
- Isolate the lower wellbore during an upper zone workover
- Control well pressure temporarily during intervention
Product Range
Wireline Set Bridge Plugs
| Model | Feature | Application |
|---|---|---|
| — | — | — |
| MWB | Standard wireline set bridge plug | General zone isolation |
| MWB-1 | Enhanced anchor force | Higher pressure applications |
| WRBP-1 | Composite/semi-composite | Easier milling for P&A operations |
| WRBP-2 | Full composite | Fast milling for plug and abandon |
Mechanical Tubing Set Bridge Plugs
| Model | Feature | Application |
|---|---|---|
| — | — | — |
| MMB | Mechanical set on tubing | Where wireline is not available |
| MSB | Mechanical set, standard | General zone isolation on tubing |
Hydro-Mechanical Bridge Plugs
| Model | Feature | Application |
|---|---|---|
| — | — | — |
| Hydro-Mech | Hydraulic and mechanical set | Deviated and horizontal wells |
| MHSB | Hydro-mechanical setting tool | Setting tool for hydro-mech plugs |
Key Specifications
| Parameter | Details |
|---|---|
| — | — |
| Setting methods | Wireline, mechanical tubing, hydro-mechanical |
| Casing sizes | 4½” – 9⅝” |
| Pressure rating | Bidirectional — holds from above and below |
| Construction | Carbon steel; composite options for easy milling |
| Standard | API |
Why Source Through Proxima
Proxima stocks MAP Oil Tools bridge plugs in standard casing sizes for fast delivery across the region. Composite and semi-composite models are available for P&A operations where milling time must be minimised.
Frequently Asked Questions
Q: What is the difference between a bridge plug and a cement retainer?
A bridge plug provides a solid bidirectional barrier with no flow path — it completely seals the wellbore. A cement retainer allows cement to be pumped through it via a back-pressure valve and is used specifically for squeeze cementing. For zone abandonment without squeeze cementing, use a bridge plug.
Q: When should I use a composite bridge plug versus a steel bridge plug?
Composite plugs (WRBP-1, WRBP-2) are designed to be milled quickly during plug and abandon operations — saving rig time. Steel plugs have higher mechanical strength and pressure ratings for production isolation. Choose based on whether you anticipate milling the plug in the future.
Q: Can bridge plugs be used in horizontal wells?
Wireline-set plugs can be challenging to deploy in horizontal sections. The hydro-mechanical models are better suited to deviated and horizontal wells. Contact Proxima for advice on tool selection for your well trajectory.
Q: What is the pressure rating of MAP Oil Tools bridge plugs?
Pressure ratings depend on casing size and model. Confirm your required differential pressure when ordering — Proxima engineers verify that the selected model meets your isolation requirements.
