Casing damage is often considered a problem of mature wells, suffered only after years or decades of corrosion, erosion, or wear fatigue, However, it is increasingly occurring in newer wells because of the wear incurred while installing initial casing in long horizontal and tortuous wellbores.
Casing repair options depend on the size and condition of the casing, the depth and extent of the leak or damage, and the productivity (economics) of the well. Schlumberger offers a full range of casing isolation, repair, and replacement technologies.
Squeeze cement into the damage to restore isolation without impeding wellbore ID, or place a cement plug or mechanical packer or plug to isolate the damaged zone.
Repair extremely small gaps or fractures in wellbores at the microscale.
Bidirectional barrier in cased hole wells for well abandonment or remedial cementing below the retainer.
Run a patch through tubing across the damaged zone, and isolate the damaged casing by cementing it in place or inflating it to create a complete seal while retaining nearly full wellbore ID.
Repair a zone of damaged tubing or casing, shut off unwanted perforations, or seal a leaking sliding sleeve.
Improve sealing reliability, especially in irregular boreholes.
Minimize costs and NPT with robust, high-pressure expandable steel annular packers that rapidly isolate zones, even in oval boreholes.
Set at low pressures to achieve zonal isolation.
Cut off the damaged casing and leave a stub that can be connected to a new casing string.
Cleanly cut tubing or drillpipe with no moving parts or chemicals.
Simplify casing repairs to keep drilling programs on schedule and secure well integrity for P&A.
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