Stuffing box for walking beam compressor
AssigneeOil Flow USA, Inc.
InventorWard S. Merrick, III
Life of this patent
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Abstract
Various methods and devices are provided for use in a walking beam compressor used with an oil well pump. In general, an injectable fibrous sealant is provided for use in a stuffing box to form a seal around a piston rod that couples to a walking beam for pumping oil out of the ground. The injectable fibrous sealant can be configured to form a gas tight seal around the piston rod, while allow reciprocal longitudinal movement of the piston rod therethrough. The injectable fibrous sealant is particularly advantageous as it has an extended life, eliminating the need to replace the seal, and repairs can be performed on-site by injecting additional sealant into the stuffing box.
Claims17
A stuffing box for use in a piston rod seal assembly, comprising:
- a cylindrical housing defining a lumen extending therethrough between top and bottom ends thereof, the top end including a flange defining a bore coaxial with the lumen and having a diameter less than a diameter of the lumen, the lumen being filled with:
- a to pressure ring adjacent to the to end of the cylindrical housing;
- a bottom pressure ring adjacent to the bottom end of the cylindrical housing;
- and
- an injectable fibrous sealant that is configured to form a seal around a piston rod extending through the bore and through the injectable fibrous sealant;
- wherein the to pressure ring and the bottom pressure ring have a generally planar surface and an opposite surface with a groove formed therein, wherein the surfaces with the groove are facing the same direction.
An oil well pump, comprising:
- a walking beam for pumping oil out of the ground;
- a piston rod mated to the walking beam;
- a compressor disposed around the piston rod and configured to receive and compress gas contained with oil pumped out of the ground;
- stuffing box having to and bottom ends coupled to the compressor and concentrically positioned around the piston rod extending through the compressor;
- wherein the stuffing box contains a to pressure ring adjacent to the to end of the stuffing box, a bottom pressure ring adjacent to the bottom end of the stuffing box, and an injectable sealant configured to form a gas-tight seal around the piston rod;
- and
- wherein the to pressure ring and the bottom pressure ring have a generally planar surface and an opposite surface with a groove formed therein, wherein the surfaces with the groove are facing the same direction.
Dependencies are inferred from the claim text.