Isolate zones rapidly and reliably during openhole ball-drop hydraulic fracturing operations in unconventional reservoirs with Saltel Xpandable FracPacker high-pressure multistage stimulation packers.
The frac packers are made up to a casing string that is run into the open hole. Rotation is possible while running in, and full casing characteristics are maintained.
Once in position, the lower end of the casing string is sealed and the internal pressure is increased by pumping from surface. The pressure is transmitted through an expansion port to the packer's integral stainless steel sleeve. The sleeve expands rapidly into the annulus between the casing and borehole, conforming to the shape of the borehole, even if it is oval, out of gauge, or irregular. The on-demand expansion eliminates waiting and requires no special expansion fluids. A built-in safety feature prevents overexpansion if the packer is expanded in front of a washout.
The patented pressure-balanced double sleeve maintains its seal even through thermal cycling and varying differential pressures in the annulus. The frac packer achieves sealing with a thin layer of bonded elastomer (HNBR). Dynamic seals can be mounted between steel rings to enhance sealing capacity and extend the temperature range.
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