Patent ID: 8528912
Filing Date: 2013-09-10
Classification: E21B

Abstract:
1. A method of providing a seal around a reciprocating polished rod on wellhead equipment, comprising the steps of: a) providing the polished rod so that the polished rod is driven at one end in a reciprocating manner and the other end being coupled to a pump located downhole in a well; b) providing a stuffing box, which stuffing box has a closed chamber having first and second openings therethrough for receiving the polished rod; c) providing packing in the stuffing box chamber, the packing being malleable and injectable; d) providing a reservoir of the packing that communicates with the chamber, the packing in the reservoir being located between a piston and an outlet, the piston moving toward and away from the outlet in a non-threaded manner; e) applying pressure to the packing in the reservoir so as to maintain the packing in chamber under pressure during the reciprocation of the polished rod.