WellLock® resin system is a high-strength, elastic polymer that functions as a dependable barrier to mitigate fluid flow. It can be formulated for delivery into the wellbore as a solids-free pure liquid or contain solids for density control. After placement, a crosslink reaction occurs to transform the liquid into a solid polymer with a three-dimensional network structure.

WellLock resin is ideal for

  • Carbon storage
  • Chemical disposal wells
  • Annular gas and post-frac remediation
  • Shoe and liner top squeeze operations
  • Permanent plug and abandonment

Chemically resistant to CO2 and acidic environments

Can be formulated as a solids-free liquid

High compressive strength and superior elasticity as a solid

Resists fluid contamination to form a high-strength solid

Carbon storage

WellLock resin is a non-Portland system that does not chemically react with CO2 and has ultralow permeability. Those two features help the system provide outstanding CO2 corrosion resistance. WellLock resin also provides superior mechanical properties to deliver enhanced performance.

The high elasticity of the system compared to conventional cement barriers helps the system better withstand the stresses induced by the cyclic load of injection operations, which helps prevent mechanical failure of the barrier. Welllock resin also provides improved shear bond strength, which helps the system better anchor to the casing and formation. This can significantly minimize debonding, which can create pathways for CO2 flow up to the surface.

Chemical disposal wells

The achievement of zonal isolation with long-term dependability across the injection zone of chemical disposal wells is critical. Conventional Portland-based cement and many specialty cement blends are not suitable for use in such low-pH environments. The WellLock resin exhibits excellent chemical resistance to most low-pH fluid and is used during the primary cement operation to isolate the well’s injection zone.

Annular gas remediation/sustained casing pressure

Ineffective mud displacement can cause sustained casing pressure, cement sheath damage, or the formation of microannuli. Compared to particle-laden fluid, the use of WellLock resin to repair this type of channel has resulted in a significantly higher success rate and improved reliability, which can reduce remedial treatment costs.

Tight casing leaks

Tight casing leaks are conventionally characterized by a “pressure-up and bleed-off scenario” opposed to the acceptance of a continuous injection rate. WellLock resin can penetrate the channels much more readily to form a seal. Casing leaks remediated using WellLock resin have the capability to withstand up to 42 hydraulic fracturing stages at pressure greater than 10,000 psi.

Permanent plug and abandonment

WellLock resin is best suited for use in permanent plug and abandonment operations to control the flow of unwanted gas with a squeeze operation.


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