Top Drive Cementing Head (TOCH)
Product Overview
The Top Drive Cementing Head is purpose-built for liner cementing operations on rigs equipped with top drive systems. It enables the pumping of cement and displacement fluids without passing through the top drive, protecting critical rig components from cement contamination and ensuring efficient, controlled liner cementation.
Key Features
- Heavy-duty swivel with precision needle roller bearings for smooth rotation under load
- Plated mandrel extends bearing and seal service life in abrasive environments
- Integral plug and ball drop subs streamline operation and reduce rig-up time
- External bypass manifold diverts circulation flow below the drill pipe dart
- Visual plug indicator sub provides reliable confirmation of dart release
- Rated for 10,000 psi working pressure with high torque transmission capability
Applications & Completion Scenarios
- Suitable for liner cementing operations using top drive systems
- Ideal for high-torque or rotating liner hanger jobs
- Applicable in wells with high solids content and extended circulation times
Advantages
- Cement and displacing fluids bypass top drive completely, protecting rig equipment
- Integrated manifold and dropping sub reduce connection time and leak points
- Cam-aligned ball valve design ensures reliable, error-free operation
Compatibility
Compatible with all standard top drive systems and liner hanger assemblies, including rotating liner hangers.
Certifications & Quality Assurance
Manufactured and tested to meet API quality and performance standards. Pressure and torque tested for each assembly.
Technical Specifications
Operational Parameters
| Parameter | Specification |
|---|---|
| Working Pressure | 10,000 psi |
| Torque Capacity | Limited only by drill pipe rating |
| Circulation Mode | External manifold bypass |
| Ball Drop Mechanism | Cam-actuated with alignment protection |
| Plug Indication | Visual and shielded for safety |
Mechanical Specifications
| Feature | Design / Material Highlights |
|---|---|
| Swivel Assembly | Heavy-duty with needle roller bearings |
| Mandrel | Chrome-plated for extended service life |
| Ball Valve | Enhanced alloy to prevent pitting in solids-laden fluids |
| Manifold | Integral multi-port with bypass channel |
| Plug Drop Sub | Integrated into main body for compact assembly |
Survivability / Limits
| Property | Value |
|---|---|
| Max Pressure | 10,000 psi |
| Temperature Rating | 150°C |
| Compatibility | All standard and rotating liner hanger systems |