Leak repair

As an exclusive representative, Endevour offers a leak repair service from Seal-Tite® International company based on a unique pressure activated sealant technology. The sealants are unique in that the pressure drop through the leak site causes the sealants to polymerize into a flexible solid. Only at this point of differential pressure will the sealant polymerization process occur. As the reaction proceeds polymerized sealant forms at the edges of the leak site and

simultaneously links together to form a flexible bond across the leak site. The remainder of the sealant is the system remains liquid.

A Seal-Tite® Technician is required on location to diagnose and cure leaks following the procedures developed for the application. If after diagnostics we determine that the leak severity is beyond our capabilities, he will not attempt to cure the leak.

We do not take on jobs unless we are confident we can cure the leak or the customer instructs us to try even though the chance of success is low.

Seal-Tite® sealants can be used in the harshest operational environments and will maintain their sealing integrity up to 500º F and to 22,000 psi. You can depend on it for high pressure leak repair jobs.

Sealants compatible with oil or water/glycol-based hydraulic fluids are designed to solidify only at the high point of differential pressure, so only the leak is sealed. Any excess sealant remains inert, in a liquid form, and will not clog the hydraulic system or other equipment.

The typical applications are:

  • Surface Leaks (Pipeline Pinholes & Weld Defects, Flange Connections, Ball & Gate Valves)
  • Wellhead Leaks (Ring Gaskets, Gate Valves & Actuators, Tubing & Casing Hangers)
  • Cement Leaks (Microannulus, P & A Cement)
  • Cavern Casing Shoes
  • Downhole Leaks (P & T Guage Mandrels, Sliding Sleeves, Seal Units & Packers, Tubing & Casing, Liner Hangers, Tie Back Assemblies)

The characteristics of the pressure-activated sealants allow for flexible delivery methods. Since the sealant remains liquid except in the presence of differential pressure, there is little concern for the time to deliver the sealant to the leak site or the pressure and temperature (below 500 °F) of the well.

Common sealant delivery methods for onshore wells include:

  • Pump down tubing
  • Pump down casing
  • Spot with wireline dump bailer
  • Spot with coiled tubing
  • Atomize into gas stream

We have 87% of successful jobs among total number of jobs when sealant was pumped.

Features and Benefits

  • Liquid sealant
  • Pressure activated
  • Polymerizes into a flexible solid
  • Solidifies only at the leak site
  • Tested to 22,000 psi and 500˚F
  • Excess sealant remains a liquid