Description
The Hydraulic Stage Collar is a reliable downhole cementing tool used in staged cementing operations in oil and gas well completion. It features a pressure-activated hydraulic sliding sleeve that opens and closes circulation ports during cementing, enabling precise zonal isolation and efficient displacement without mechanical shifting tools.
Stage collars are essential in multi-stage cementing because they allow the cementing process to be divided into separate intervals, improving cement placement quality and enhancing zonal isolation in complex wells. Hydraulic actuation ensures reliable tool performance even under high-pressure conditions.
Product Overview
A stage collar is typically installed inside the casing string before running into the well. It provides selectively controllable fluid communication between the casing and the annulus via ports that can be opened and closed. The Hydraulic Stage Collar uses downhole pressure to activate a sliding sleeve mechanism, which eliminates the need for conventional shifting tools and increases operational efficiency. This makes it especially suitable for modern high-pressure oil and gas wells and staged cementing programs.
Key Features & Advantages
Hydraulic Pressure Activation
The sliding sleeve is actuated by applying downhole pressure, providing a reliable opening and closing action for circulation ports during cementing.Suitable for High-Pressure Wells
Designed to withstand the higher pressures encountered in modern oil and gas well cementing environments.Enhanced Cementing Control
Enables precise stage cementing by selectively opening and closing ports at different intervals, improving zonal isolation and cement placement quality.Eliminates Mechanical Shifting Tools
Hydraulic actuation removes the need for mechanical shift tools to operate the stage collar, making operations simpler and faster.Clear Parameter Definition
Available in standard casing sizes such as 5-1/2″ and 7″ with defined activation pressure and geometry for predictable performance.
Technical Specifications
| Specification | 5-1/2″ | 7″ |
|---|---|---|
| Length (mm) | 903 | 1067 |
| Max O.D (mm) | 168 | 210 |
| Activation Pressure (MPa) | 21 | 21 |
| Opening Sleeve I.D (mm) | 87.31 | 114.3 |
| Drill-Out I.D (mm) | 123.03 | 157.48 |
| Max O.D. (mm) | 130 | 160 |
| Max Cementing Plug O.D. (mm) | 123 | 157.48 |
Please send us your required specifications, parameters, or technical drawings. Our expert team will help confirm the suitable model and provide a factory quotation within 24 hours.
Email: info@shangshanpetro.com
Contact: Contact Us for a Quote
Applications
The Hydraulic Stage Collar is widely used for:
Multi-stage cementing of casing strings
Precise annular isolation and zonal cement placement
High-pressure oil and gas well cementing operations
Onshore and offshore completion projects
Hydraulic stage collars improve cement displacement efficiency and zonal isolation by providing controlled opening and closing of ports at predetermined intervals during cementing.
Frequently Asked Questions
Q1: What is a hydraulic stage collar?
A hydraulic stage collar is a cementing stage tool that uses downhole hydraulic pressure to activate a sliding sleeve, opening or closing ports for staged cementing without mechanical shift tools.
Q2: How does a hydraulic stage collar improve cementing quality?
By allowing cementing in multiple stages with precise control over port opening, it enhances zonal isolation and improves cement placement, which reduces channeling and improves well integrity.
Q3: What activation pressure is required?
The hydraulic stage collar on this page is designed for activation at approximately 21 MPa of downhole pressure.
Q4: What size options are available?
This model is available in 5-1/2″ and 7″ sizes, covering standard casing programs used in oil and gas wells.
