In the oil and gas industry there is a practice called fracking, to speed up the migration of gas and petroleum fluid from source rocks or reservoir rocks.

The fracking is an oil and gas well stimulation measure with broad application prospects. At present, hydraulic fracturing is the main form of natural gas exploitation. Water (fracturing fluid) mixed with chemical substances is used to inject into shale formation for hydraulic fracturing to release natural gas.

However, once the chemicals and sand work their way into the cavities and bores, or spaces between parts, which are required for any moving part to function properly, many problems occur that cause the equipment to wear, malfunction, fail or become inoperable. This can cause a dangerous situation to life and/or the environment.

JST Seals provides a gate valve seal assembly that provides for external pressure to be introduced to an energized seal of a valve, and compress the seal against a gate with enough force to block any paths where sand and chemicals would otherwise travel into valve body cavity or void. The external pressure introduced through pressure fitting makes the parts move like piston forcing the parts to compress together eliminating the machined tolerances or gaps required for the gate to be opened or closed. The compression can be provided by hydraulic pressure devices through injection ports. A separate valve seal assembly can be provided for each face of the gate and both assemblies can be activated when the fluids are flowing (open position) and an upstream valve seal assembly activated when the gate is in a closed position.

The valve seat seal can provide mechanical compression or energize the valve seat to achieve a mechanical seal independent of wellbore pressure. It is usually required to affect the seal and prevent debris from entering the valve cavity or valve interior to avoid valve failure, thus increasing safety and environmental protection, reducing maintenance or repair costs, and extending the life of the equipment.