Saltel Industries has recorded another success running an external casing packer in a Coal Seam Gas well, despite very difficult run in hole conditions. Due to downhole restrictions, the expandable steel ECP was worked for several hours before being pulled out of hole. Once at surface, the ECP was found to be intact whereas other annulus packers would have suffered material damages.
Following a successful 2-well campaign for one-stage and two-stage cement jobs, this 7 in. Expandable Steel External Casing Packer (ECP) was installed, and allowed to perform off-bottom cementing above a pre-perforated casing section. It was the last from a field trial campaign of 3 Saltel Steel ECPs.
On previous operations, the operator regularly encountered frequent loss zones while drilling and needed to perform stage cementing operations. The packers had to be set either in cased or open hole and had to withstand both difficult running conditions in deviated wells, and under gauged holes. The 3rd packer was run in hole through a tight spot. Nevertheless, both installation and off-bottom cementing operation were successful. This proved the following facts regarding Expandable Steel ECP technology:
- Saltel Steel ECP’s sturdiness: the ECP displays an extraordinary robustness, allows running in hole in difficult conditions.
- Saltel Steel ECP has proved a relatively easy to run and easy to set product, conforming itself to any stage cementing configuration, and every situation (depth, hole size, deviation, etc.).
- The successful consecutive installations outline Saltel Steel ECP’s reliability (sealing effectively regardless of what happens, and improving the annulus integrity).
More details about the ECP installation
During the first run, the packer went through a tight spot but elements above the packer were stuck. The string has been worked for 12 hours, attempting to pull all the equipment out of hole.
When pulling the casing back to surface, the SES ECP showed no signs of deformation and looked "good as new” as per client words.
Finally, Saltel Steel ECP was run back and successfully set in nominal 8 3/4in Open hole (with potential washout). The Cement job went well with full cement return. The possibility to rotate and put weight on the packer during RIH has been capital.
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Adapted from a press release by David Bizley
Read the article online at: https://www.oilfieldtechnology.com/product-news/01072016/saltel-steel-ecp-demonstrates-unusual-resilience-despite-severe-rih-conditions/