When it comes to setting off-bottom cement plugs, your success rate matters. Explore how you can achieve 100% success.
The key challenge
A potential solution
Designed to be pumped through long work strings, the CST effectively exits and fills the open or cased hole, ensuring robust support for the off-bottom cement plug. This design simplifies the cementing process, making it more efficient and reliable.
The CST is available in five standard sizes, with an additional customized version specifically for coiled tubing. This variety ensures that you can select the perfect size for your specific cementing needs, maximizing the effectiveness and reliability of your operations.
Choosing the right CST size is straightforward and depends on two key factors:
| Cement Support Tool | The inner diameter of your work string | The inner diameter of the open or cased hole where the cement plug will be set |
|---|---|---|
| 2" Cement Support Tool BROWN MODEL | Work String Range 2 - 4½" ID | Hole / Casing Size 6 – 16" ID |
| 2” Cement Support Tool BLUE MODEL | Work String Range 2 - 5” ID | Hole / Casing Size 7 - 16” ID |
| 2 ½" Cement Support Tool GREEN MODEL | Work String Range 2 ½ - 5.16" ID | Hole / Casing Range 7 ½" – 20" ID |
| 2 ½" Cement Support Tool ORANGE MODEL | Work String Range 2 ½"-6" | Hole / Casing Range 7 ½" – 20" ID |
| 4" Cement Support Tool BLACK MODEL | Work String Range 4" - 6.5" ID | Hole / Casing Range 8" - 42" ID |
| 2 ⅜" Cement Support Tool YELLOW MODEL | Coil Tubing CST 2 ⅜" | Hole / Casing Range 4" - 16" ID |
In the complex and challenging world of well drilling, ensuring operational efficiency and minimizing costly errors is crucial.
When a drill string gets stuck, the bottom hole assembly (BHA) may be left in the hole, needing a sidetrack. A cement plug is placed to ensure success, but fluid properties can cause issues. Using the Cement Support Tool (CST) provides a stable base, ensuring nearly 100% success.
Explore ApplicationsWithout precise reservoir data, errors can be costly. A pilot hole is drilled to confirm Oil Water Contact (OWC) and Oil Gas Contact (OGC) depths, and must be plugged before drilling the production wellbore. Using the CST ensures nearly 100% success by providing a stable base for the cement plug.
Explore ApplicationsWhen casing is set shallow above a long rat hole, a CST can be placed 10-15 meters below the planned casing shoe depth to keep the cement slurry in place. This ensures minimal cement below the CST and increases success to nearly 100%.
Explore ApplicationsAfter drilling an exploration well, it must be plugged and abandoned, often requiring multiple cement plugs. An operator in the North Sea set four successful cement plugs using CST, saving time and costs. The process involves setting a CST below each plug and weight testing each plug for success, ensuring nearly 100% success.
Explore ApplicationsWhen a production well or field has ended its lifetime, it is time to Plug & Abandon (P&A) the well. Most wells will have a production tubing from the surface down to a production packer and a lower completion.
Explore ApplicationsUsing a Bridge Plug is time-consuming since it requires multiple steps. Replacing it with a CST allows setting the CST and the P&A cement plug in a single run, saving significant rig time and cost.
Explore ApplicationsDownhole losses are common when drilling into weak formations. While shallow losses are easy to manage, deeper losses pose challenges. Setting a CST below the loss zone prevents mixing of well fluid and cement, ensuring a successful cement squeeze. This method has proven highly effective for many clients.
Explore ApplicationsNumber of CSTs delivered worldwide
Number of countries delivered to
Current success rate for the Cement Support Tool
“I have not set a balanced plug in over 5 years without being supported by the CST in open hole and so far it has a 100% success rate.”
“The Cement Support Tool has become essential for our operations. Its ease of use and high success rate in cement plug operations have significantly improved our operational efficiency and productivity. We’ve cut our cementing time by nearly half.”
“We are saving between 18 and 32 hours of operational time using the CST instead of a bridge plug for our plugs, saving time by not having to scrape and make up the BHA to set our base.”
“The CST has allowed us to plan for considerable shorter cementing operations, increasing our efficient rig time and keeping our plug cost at lower intervals than before.”
“Since we started using the CST, our cement plug operations have become significantly faster and more reliable. We’ve managed to cut down our cementing time by 35%, which has been a huge benefit.”
“Simply put there is always a CST on my rig since we can save so many hours by having it available if we require it.”
Showcasing the widespread use and impact of our Cement Support Tool.
Perigon is a well established Norwegian supplier to the global oil & gas industry. Since the invention of the well-known Cement Support Tool (CST) in 2002, Perigon have supplied thousands of tools to operators in all corners of the world, to ensure successful cement plugs on first attempt.
The CST technology is continuously being developed for use in new and challenging applications. The employees and founders are constantly working on improving well operations. As a result, a new product offering was released in 2019, namely CleanPipe.
In addition to our main offices outside Stavanger, we have representatives across the world, and we aim to supply our products anywhere they are needed. For further information, please do not hesitate to contact us.
Chief Executive Officer
arild@perigon.no+4790154220General Manager
magnus@perigon.no+4747686846Technical Manager
kristian@perigon.no+4795244733In addition to our main offices outside Stavanger, we have representatives across the world, and we aim to supply our products anywhere they are needed. Our network of representatives ensures a responsive and localized experience, regardless of your location.
We understand the unique needs of each region and are committed to providing exceptional service wherever you operate. This means you can procure, collaborate with, or simply buy from our team with ease, leveraging local expertise to meet your specific requirements.
Malaysia
E-mail: ong.kokkheong@tendrill.comPhone: +6012 345 8923Oman, Qatar, Kuwait, UAE & India
E-mail: pscoman@psc-llc.comPhone: +968 24485 309Australia
E-mail: sales@acc-corporate.comPhone: +61 8 9470 5070South America
E-mail: Ricardo AboudGlobal
Global
Europe & Africa
E-mail: cl@mocs-drilling.comPhone: +33 (0) 618 060852The Cement Plug Blog
The place where Drilling Engineers and Cementing Professionals go to learn and share their knowledge about setting balanced cement plugs.
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FAQ for the Cement Support Tool
Here are some of the common questions that frequently come up. Want more detailed information or have different questions altogether? Reach out to us—we're here to help you.
The most common way to install the CST is to pump it through the drill pipe work string before the cement is pumped downhole. That being said, it can also be pre-installed in a pipe and run into the well in front of a coil tubing.
Yes, the CST can be used in both cased hole and open hole applications.
Yes, the CST is designed to fill uneven wellbores provided the maximum wellbore diameter is smaller than the maximum hole/casing diameter for the specific CST.
The CST is not designed to anchor, and tagging it might move the CST, or in worse case damage it. Hence, we do not recommend to tag the CST.
As the CST simply separates the cement above and the well fluid below, it can support unlimited volumes of cement.
The CST does not hold differential pressure as it is designed to act as a floating piston and simply separate the cement above and the well fluid below it. The CST will therefore move slightly and find equilibrium state prior to hardening of the cement.
Yes, the CST is not restricted by the deviation of the wellbore. When a cement plug is set in horizontal wells it is important to ensure the cement stay in place also in the top end of the cement plug. A second CST can be used for such application.
The CST is fully drillable. Clients often report back that they didn’t even notice the CST when they drilled out the cement plug.
Yes, the CST can be set below the loss zone to help divert the loss material into the loss zone.
We normally have the CSTs ready on the shelf and since it can be airfreighted it can be expressed delivered to most location within a week.
The CST is mainly made out of aluminium, composite and canvas, with a few ounces of mild steel.
When the CST is stored in a dry environment inside the original shipping packaging, the shelf life is set to 5 years. After 5 years, we recommend to dispose the CST or send it back to Perigon for refurbishment.
Our definition is that when the cement plug is placed at desired depth and the plug’s objective is met, the cement plug is considered as success and thereby the CST has assisted in this success. The CST success rate is 97%.
We are ready to help you with any questions regarding our products.
We are ready to help you with any questions regarding our products. Feel free to call us, drop us an email or use the contact form.
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