Stage Collar for Multi-Stage Casing Cementing
Operators use a Stage Collar for multi-stage casing cementing. The tool sits in the casing string and opens side ports at a planned depth. Then, cement flows through the ports into the selected section of the annulus.
After displacement, the collar closes the ports and seals the flow path. As a result, the crew can control cement placement in long casing strings, weak formations, or wells with lost circulation risk.
Technical Data
| Item | Description |
|---|---|
| Product Type | Stage cementing collar |
| Main Function | Opens and closes side ports for staged cement placement |
| Installation Point | Planned depth in the casing string |
| Cement Flow Path | From casing bore through side ports into the annulus |
| Operation Stage | After the first-stage cementing operation |
| Common Applications | Long casing strings, weak formations, lost circulation zones |
| Main Advantage | Controls cement placement without pumping the full interval in one stage |
| Order Requirements | Casing size, weight, grade, connection type, stage depth, and port configuration |
When to Use a Stage Collar
Choose a Stage Collar when one cementing stage cannot cover the full casing interval safely. For example, it helps when the well has a long casing string, weak formation, or lost circulation risk. Also, it supports better cement distribution in the upper annulus.
For casing size, connection type, stage depth, and port configuration, send an enquiry to Saxon Drilling.
FAQ
What does a Stage Collar do?
It opens side ports in the casing string so cement can enter the annulus at a selected depth.
When should operators use a Stage Collar?
Operators should use it when the well needs staged cement placement instead of one full-interval cementing job.
Does the Stage Collar close after cementing?
Yes. After displacement, the collar closes the ports and seals the flow path.
