Centralization Without Compromise: PHAZER™: FLEX Enables Smooth Liner Deployment.

A major operator in Malaysia successfully ran and cemented a 7-5/8" liner through a

9-5/8" milled window offshore Sabah using VULCAN's PHAZER™: FLEX centralizer.

PHAZER™: FLEX, the industry-leading under-reamed centralizer with its patented flexible blade design, compressed through the restricted ID and expanded back in open hole to provide effective standoff.

This enabled smooth liner deployment across a challenging horizontal section of more than 3,281 ft.

Under Managed Pressure Drilling (MPD) conditions, the centralization solution proved critical, maintaining standoff and ensuring reliable cement placement. The result: zonal isolation and long-term well integrity without drag, sticking, or losses, even over the extended horizontal interval.

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Well Parameters

Parameter	Value
Well Type	Development
Measured Depth (Final)	14,775 ft
True Vertical Depth (TVD)	7,923 ft
Hole Size	9-5/8" window → 7-5/8" liner
Mud System	9.4 ppg Synthetic Oil-Based Mud (SBM)
Whipstock	Hydraulically set at 83º inclination, 45° LOHS orientation
Seabed Depth	3,995 ft below Mean Sea Level

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Centralizer Selection and Placement

• Objective: Achieve required standoff across the liner interval. Reduce running friction through 9-5/8" casing and optimize stand-off in under-reamed open hole.

• Selection Basis: Advanced torque and drag simulations using VULCAN’s proprietary modeling software to predict torque, drag, and buckling behavior.

• Placement Strategy: Centralizers installed at calculated intervals along the 7-5/8" liner string to ensure mobility and proper cement sheath placement.

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Results

Centralization Achieved

• Smooth passage through 9-5/8" milled window with no excessive drag.

• Liner successfully reciprocated and rotated while running in hole, confirming low drag and effective centralization.

Cementing Outcome

• Liner rotated throughout cementing, improving mud displacement and ensuring uniform slurry placement.

• Full slurry placement achieved with no reported losses.

• Positive indications of dart/shear plug landing.

• Annulus packer and liner hanger successfully tested.

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Conclusion

The proper selection, design, and placement of centralizers on the 7-5/8" liner ensured smooth running to target depth with no issues. PHAZER™: FLEX units enabled passage through the casing exit window at 83º inclination and effectively managed torque and drag across the 3,281 ft horizontal section.

The liner was successfully reciprocated and rotated during deployment and cementing, enhancing mud displacement and slurry placement. Rotation and pump circulation overcame tight spots, validating the centralizer design in maintaining standoff and preventing sticking.

Cement placement was executed with good pressure control, and the liner hanger system was set successfully demonstrating the centralizers’ critical role in maintaining wellbore clearance and enabling effective cementation on the first attempt.

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Why PHAZER™: FLEX?

The success of this deployment reinforces PHAZER™: FLEX as the go-to solution

for challenging liner runs in under-reamed wells, especially where torque, drag,

and cement integrity are critical.

It's unique patented flexible blade design delivers reliable standoff without compromise, even through tight casing exits and extended horizontal sections.

For operators seeking dependable centralization under MPD or complex well conditions, PHAZER™: FLEX offers proven performance, smoother deployment, and enhanced cementing outcomes — first time, every time

Contact Sales@Vulcan-CP.com for further information.

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