The GW packer is available in a full range of tubing
or casing sizes, in two-cup or four-cup models, with either standard or
special cups. In its simplest form, the two cup GW has a one-piece
seamless steel mandrel with top and bottom box connections. It has no
latch or locking mechanism to be fouled by sand, shale, or mud. It has no
slips, does not require tubing weight to be set, and packs-off equally
well at any point in the hole.
The GW packer is offered in two types: Standard and Special. Simplicity
of design, rugged construction, and unusually low cost make the
GW attractive to the operator for a wide variety of applications.
Standard GW Packer
The Standard GW packer has a seamless steel mandrel with an extra large
opening. Standard GW, Standard Heavy-Duty GW and GWD Heavy-Duty cups fit
this packer. The Standard GW packer is suitable for all applications
involving normal pressures.
Special GW Packer
The Special GW Packer has a full-opening, thick wall, seamless steel
mandrel, making it an excellent choice for rugged-duty, high-pressure
applications. The Special GW and Special Heavy-Duty GW cups fit this packer.
Powerful Type GW Packer Cups
The GW cups, used as a packing element on this packer, hold so well that
the operator is cautioned to be sure means of bypassing fluid is
provided when using the GW packer. Where fluid circulation above the
cups is required, a Guiberson circulation slide valve may be used. For
anchoring the packer, a Guiberson mechanical tubing anchor or a
Guiberson hydraulic anchor is recommended.
Choose From Five Varieties in a Wide Range of Sizes
There are five variations of GW packer cups; the Standard, the Standard
Heavy-Duty, the GWD Heavy-Duty, the Special and the Special Heavy-Duty.
Each is available in a wide range of sizes. These cups, plus the two
type of GW packers, give the operator virtually unlimited
possible combinations from which to choose for the well service purpose.
New applications for GW packers and cups are constantly being discovered
and reported from the field. Consult your Guiberson representative if
you have a particular problem that the GW might solve.