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Casing Patch

 

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The recovery optimization of the hydrocarbon production is getting more and more important to operators. Managing oil and gas reservoirs more efficiently has become increasingly complex:

  • The need for isolating unwanted perforations in both production and injection wells has been growing
  • The necessity to restore casing integrity is now almost inevitable:
    • To prevent the well from fluid or gas migrations in the annulus
    • To prevent the well from any risk of blow out
    • To lengthen the well life
    • To stimulate and preserve the production rates

Restoring casing integrity, for either casing repair or perforation shut-off, means meeting the seemingly contradictory objectives of obtaining a down hole high pressure-resistant sealing inner lining system, while at the same time allowing maximum Inside Diameter – ID access for further remedial and Enhanced Oil Recovery – EOR operations.

The SES (Saltel Expandable Steel) Casing Patch does not significantly reduce the casing diameter nor restricts the access to the wellbore below. A wide number of very different solutions have been used, including cement squeezes (After numerous cement squeeze failures, Casing Patches can be successfully set to complete the failing cement operation as a cement backup solution, and avoid casing leaks in an oil or gas well), injection of gels, straddle packers, and various composite and steel patches, all with varying levels of success.
Saltel Industries have developed, tested and successfully trialed (Hundreds of patches installed worldwide) the use of their stainless steel Casing Patch being expanded in situ, to create a high pressure - resistant inner lining inside the tubular. Initially designed for perforation shut-off, the technology is now suitable for repairing both short lengths of damaged or corroded completion, but also for repairing damaged completion modules.


Saltel Industries' Casing Patch is a remedial expandable steel solution for the oil and gas wells' integrity. Casing leaks and damaged completion issues need oilfield solutions that can resist to harsh environments while maintaining or bringing back the oil or gas production to satisfactory levels. Saltel Casing Patch is effectively fitting to these oilfield downhole challenges.

SES Patch is an economic way to stimulate the well production or to avoid plug and abandonment operation. One of the best advantages of a SES Casing Patch is offering maximum internal diameter and leaving full access to the well below as per inner diameter – ID requested by the client and validated by our dedicated software (job planner) prior to the patch installation.

The SES Casing Patch is a permanent solution, repairing zones of damaged tubing or casing, shutting-off unwanted perforations – modifying injection profiles, and shutting off gas and water (the SES Casing Patch reduces the water cut: large volumes of water may be produced to keep some Oil company operators’ wells at economic oil production rates. As a result, numerous perforations zones need to be isolated with an inner lining system), to seal a leaking DV tool, a damaged frac port, or leaking sand screens or ICDs (new well applications) + other remedial applications. High temperature and harsh environment Casing Patches can also be used for damaged tubulars, slotted liners or screens in thermal applications (Steam Assisted Gravity Drainage - SAGD, and Cyclic Steam Stimulation - CSS).


The SES Casing Patch is made from high quality stainless steel and elastomer outer skin with a profiled sealing system. It is run on tubing, drill pipe, and now Coiled Tubing. At depth the Patch is expanded using a high pressure inflatable packer, and pushed against the casing to activate the outer seals. Once installed, the setting tools are then extracted from the well. SES Casing Patch exists in various thicknesses, according to the well’s required specific application.