Abstract: A rod packing assembly that includes a wiper ring is disclosed. In one embodiment, a rod packing assembly comprises a first ring, a second ring, a third ring, a first biasing member, a second biasing member, and a third biasing member. The third ring has at least one port, and is positioned between the first ring and the second ring. The first ring, the second ring, and the third ring surround a rod and to scrape a surface of the rod. The first biasing member applies a first force to urge the first ring against the rod, and the second biasing member applies a second force to urge the second ring against the rod. The third biasing member applies at least a third force to urge the third ring against the rod. The first and second rings are arranged to apply forces to urge the third ring against the rod.

Abstract: A rod packing assembly that includes a wiper ring is disclosed. In one embodiment, a rod packing assembly comprises a first ring, a second ring, a third ring, a first biasing member, a second biasing member, and a third biasing member. The third ring has at least one port, and is positioned between the first ring and the second ring. The first ring, the second ring, and the third ring surround a rod and to scrape a surface of the rod. The first biasing member applies a first force to urge the first ring against the rod, and the second biasing member applies a second force to urge the second ring against the rod. The third biasing member applies at least a third force to urge the third ring against the rod. The first and second rings are arranged to apply forces to urge the third ring against the rod.

Abstract: A tangentially cut rod packing ring is provided. The tangentially cut rod packing ring comprises a first ring formed from a plurality of segments. Each of the segments has a portion of two interfaces where each interface slidably engages an interface of an adjacent segment. One interface terminates at a leading surface. One interface has a stop surface. The leading surface is originally separated from the stop surface by a gap. As the interfaces slidably move, the gap lessens until the leading surface abuts the stop surface. The tangentially cut rod packing ring also comprises a second ring formed from a plurality of segments. The second ring has a first portion and a second portion. The first portion forms as shelf on which the first ring sits. The second portion surrounds the first ring. An elastic member in a groove on the outer surface of the second portion provides a compressive force on both the second ring and the first ring.

Abstract: A tangentially cut rod packing ring is provided. The tangentially cut rod packing ring comprises a first ring formed from a plurality of segments. Each of the segments has a portion of two interfaces where each interface slidably engages an interface of an adjacent segment. One interface terminates at a leading surface. One interface has a stop surface. The leading surface is originally separated from the stop surface by a gap. As the interfaces slidably move, the gap lessens until the leading surface abuts the stop surface. The tangentially cut rod packing ring also comprises a second ring formed from a plurality of segments. The second ring has a first portion and a second portion. The first portion forms as shelf on which the first ring sits. The second portion surrounds the first ring. An elastic member in a groove on the outer surface of the second portion provides a compressive force on both the second ring and the first ring.

Abstract: The present application provides a static seal assembly for a rod configured for reciprocal motion. The static seal assembly is generally sized to fit within a conventional cup of a stuffing box. The static seal assembly has a body with a base and a balloon that fit within the cup. The balloon is made of an expandable material and is selectively in fluid communication with a pressurized fluid source. When pressurized, or inflated, the balloon expands and forms a seal interface with the outer surface of the rod.

Abstract: A tangentially cut rod packing ring is provided. The tangentially cut rod packing ring comprises a first ring formed from a plurality of segments. Each of the segments has a portion of two interfaces where each interface slidably engages an interface of an adjacent segment. One interface terminates at a leading surface. One interface has a stop surface. The leading surface is originally separated from the stop surface by a gap. As the interfaces slidably move, the gap lessens until the leading surface abuts the stop surface. The tangentially cut rod packing ring also comprises a second ring formed from a plurality of segments. The second ring has a first portion and a second portion. The first portion forms as shelf on which the first ring sits. The second portion surrounds the first ring. An elastic member in a groove on the outer surface of the second portion provides a compressive force on both the second ring and the first ring.