Packing assembly for reciprocating pumps
AssigneeSchlumberger Technology Corporation
InventorsGarud Sridhar, Mike Wedge, Joe Hubenschmidt, John Starr, Terry Riddle
Life of this patent
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Abstract
A packing assembly adapted to be mounted on and seal a reciprocating shaft includes a packing nut, an elastomeric sealing member releasably coupled to the packing nut, and a keeper to facilitate the releasable coupling between the elastomeric sealing member and the packing nut, wherein the entire assembly is removable from the reciprocating shaft as a unit.
Claims19
A method for servicing a seal for a reciprocating shaft, the method comprising the steps of:
- providing a packing assembly mounted to a reciprocating shaft, wherein the assembly includes a packing nut including a shoulder portion, at least one split elastomeric sealing member releasably coupled to the shoulder portion of the packing nut, and a keeper having an elongated finger extending from one end of the keeper to releasably engage the packing nut;
- and
- removing the packing nut from the reciprocating shaft by engaging a notch of the elongated finger engaged with one or more retaining devices adapted to constrain axial displacement of the keeper with respect to the packing nut such that the packing nut, the at least one split elastomeric sealing member, the keeper, and the one or more retaining devices are unitarily removable from the reciprocating shaft.
A packing assembly adapted to be mounted on and seal a reciprocating shaft, the assembly comprising:
- a packing nut including a shoulder portion;
- at least one split elastomeric sealing member releasably coupled to the shoulder portion of the packing nut;
- a keeper having an elongated finger extending from one end of the keeper to releasably engage the packing nut and releasably couple the at least one split elastomeric sealing member to the packing nut, wherein the elongated finger defines a notch therein;
- and,
- one or more retaining devices engaging the notch of the elongated finger, so as to constrain axial displacement of the keeper with respect to the packing nut, wherein the packing nut, the at least one split elastomeric sealing member, the keeper, and the one or more retaining devices are removable from the reciprocating shaft as a unit.
A packing assembly adapted to be mounted on and seal a reciprocating shaft, the assembly comprising:
- a packing nut including a flanged portion and shoulder portion;
- at least one split elastomeric sealing member releasably coupled to the shoulder portion of the packing nut;
- and
- a keeper having a base and an elongated finger extending from one end of the keeper to releasably engage the packing nut at a distal end of the elongated finger and releasably couple the at least one split elastomeric sealing member to the shoulder portion of the packing nut, wherein the elongated finger defines a notch therein and is integrally formed with the base;
- one or more retaining devices received at least partially around the packing nut and engaging the notch of the elongated finger so as to constrain axial displacement of the keeper with respect to the packing nut, and wherein the packing nut, the at least one split elastomeric sealing member, the keeper, and the one or more retaining devices are removable from the reciprocating shaft as a unit.
Dependencies are inferred from the claim text.