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Standard GW
Type GW Standard packer cup is a directional packing element that
automatically seals, packing off and holding pressure on the side toward
which the lip is pointed. The lip readily passes fluid in the opposite
direction, acting as a casing check valve. Developed after many years of
research experience and specialization in the manufacturing of
flexible-lip, basket-type cups, this pressure seal packer cup is molded
of a special oil and gas resistant compound. It has a strong,
flexible-lip of oversize diameter, so that an immediate compression of
the cup against the casing is obtained for instantaneous and positive
sealing. The cup is reinforced with molded-in spring steel wires,
interlocked in a metal bushing to seal and hold high pressures. The
greater the differential across a GW cup, the tighter the cup seal. The
Standard cup is used on the Standard GW packer.
Special GW
The Special Type GW cup has an extra thick wall for
extremely rugged well service, such as high pressure cementing and
formation fracture processes. It fits the Special GW packer.
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Standard Heavy-Duty and Special Heavy-Duty GW
Heavy-duty cups are available in both the Standard and Special types.
These cups have thicker lips, are more heavily reinforced, and are
molded from compounds specifically formulated for heavy-duty
applications. These cups work on the Standard and Special GW packers,
respectively.
Heavy Duty GWD
The GWD is a heavy-duty packer cup that incorporates two rows of
interlocking steel springs as molded-in reinforcement. This unique
design makes the cup especially effective in high pressure, rugged
applications such as testing and fracturing. This cup fits the Standard
GW packer.
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