Saltel Xpandable* expandable steel
External Casing Packer (ECP)
Saltel Xpandable expandable steel External Casing Packer (ECP) is a robust, expandable stainless-steel device. This packer sets at low pressure to achieve zonal isolation. Saltel ECP operates in any stage cementing operation. The ECP can also act as an additional barrier with fresh cement to prevent channeling in the annulus.
The Packer working principle
Firstly, the ECP sleeve expands between the casing and borehole by applying pressure in the casing. The pressure flows through an expansion port into the external casing packer’s integral stainless-steel sleeve.
As the sleeve expands, it conforms to the shape of the wellbore. A thin layer of bonded elastomer ensures sealing in irregular boreholes. The expandable sleeve also acts as a centralizer for the casing string.
Moreover, Saltel ECP comes as a one-piece mandrel with no hidden connections. Both ends are fixed and protect the expandable sleeve during the running-in-hole. The robust ECP construction allows rotation and works through doglegs and tight spots, and maintains the full casing characteristics.
The expansion port features a one-way valve system that traps fluid inside the expandable sleeve to increase the differential pressure rating.
The expansion port features a valve system that permanently closes the communication with the casing. The valve does not activate until it does not reach a specific pressure level. The activation pressure is adjustable by replacing an easily accessible shear pin.
In both versions of the external casing packer, the expansion port also serves as a safety feature. If the external casing packer expands in front of a severe washout, the valve closes, preventing fluid loss.
Designed for cased holes and open hole completions, Xpandable ECP operates mainly in cementing operations. Cement backup, primary cement improvement, single-stage, multistage, or off-bottom cementing. The Packer can also work in specific annular isolation applications.
First, the expandable steel ECP provides an effective steel barrier between the casing and borehole.
Then, the Packer prevents fluid or gas migration in the annulus. It eliminates cross-flow during the cementation and stops gas migration during the cement setting.
The external casing packer seals in any hole shape and condition, including oval, out of gauge, and irregular boreholes. (It does not include severe washouts).
The external casing packer maintains the casing rating by avoiding extra connections or casing internal diameter reduction.
Then, It saves rig time with fast installation, on-demand expansion, and immediate sealing.
On top of that, the external casing packer minimizes non-productive time with robust construction that withstands reciprocation and rotation to pass through doglegs and tight spots.
Deep offshore completions
Saltel Expandable Steel Packers meet the requirements of most challenging applications such as deep offshore completions. Saltel Xpandable Steel open hole Packers allow permanent annular isolation.
Sand screen isolation
Splitting long lengths of the annulus into shorter sections to improve flow control and prevent sand migration. Challenge Horizontal completions are becoming more extended and more sophisticated, often through different formations….
Once expanded against the borehole, Xpandable Steel Packers compartmentalize the annulus into independent parts. The current article explores the potential for expandable steel packer technology to be used in primary…
Allow cementing the annulus in two or more stages regardless of losses zones. Challenges in Multistage cementing Low-pressure formations, such as depleted reservoirs, can cause difficulty in multistage cementing or…
Primary cementing backup
Improve primary cementing, preventing gas or water channeling in cement Primary cement backup challenges Annulus cementing is essential as a primary well barrier to secure the environment, and ensure the…
Seal in the annulus and isolate troublesome loss zone section Challenge A single stage cementing operation can be requested to start cementing only above the loss zone, in case it is located at…