Wet Shoe Sub
Simple and Reliable Toe Initiation for Legacy and Modern Completion Designs
Product Overview
The Wet Shoe Sub is a dependable, minimalist toe initiation device engineered to support casing pressure testing prior to stimulation. Designed for operators who prefer proven workflows, it enables a clean transition from pressure verification to stage-one initiation via tagging or perforation.
Key Features
- Enables casing pressure tests before frac operations
- Supports flow initiation through tagging or perforation
- Straightforward design with no moving parts
- Reliable option for both vertical wells and horizontals using legacy workflows
Applications & Drilling Scenarios
- Vertical wells with traditional stimulation workflows
- Unconventional horizontals requiring straightforward toe initiation
- Wells where pre-frac casing integrity verification is mandatory
- Operations preferring minimal tool complexity and maximum reliability
Advantages
- Zero moving parts minimizes risk and simplifies operations
- Compatible with legacy tag/perf workflows without procedural changes
- Cost-effective alternative to hydraulic toe valves or sleeves
Compatibility
- Standard casing strings across multiple sizes
- Tag-based or perforation-based initiation methods
- Integrates with plug-and-perf, pump-down, or traditional stimulation programs
Certifications & Quality Assurance
Manufactured within Frontier Oil Tools’ controlled quality system using API-compliant materials. Documentation packages and pressure test certifications available on request.
Technical Specifications
Operational Parameters
| Parameter | Value |
|---|---|
| Function | Pre-frac casing pressure testing; post-test initiation via tag/perf |
| Activation Method | Mechanical initiation (tag or perforate) |
| Pressure Testing | Supports casing integrity verification prior to stage 1 |
| Flow Initiation | Operator-controlled post-test access |
Mechanical Specifications
| Parameter | Value |
|---|---|
| Tool OD | Matches casing/tubing size (various sizes available) |
| Configuration | Simple, non-mechanical sub |
| Installation | Integrated into casing string |
| Custom Options | Thread connections, metallurgy, and profile as requested |
Dimensions and metallurgy vary according to casing size and customer requirements.
Survivability / Limits
| Parameter | Value |
|---|---|
| Pressure Rating | Matches casing grade (application-dependent) |
| Temperature | Application-dependent |
| Failure Modes | None – no internal moving components |