# US 2018/0298722 A1 · Frac pump seat assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0298722 A1 - Document ID: US20180298722A1 - Status: Published application - Kind: A1 - Application number: 15/956,679 - Filed: 2018-04-18 - Published: 2018-10-18 - Earliest claimed: 2017-04-18 - Assignees: ST9 Gas and Oil, LLC - Inventors: CHRIS BUCKLEY - Web page: https://patentgrep.com/patent/US20180298722A1 ## CPC - E21B 34/06: in wells - F04B 1/0452: Distribution members, e.g. valves (machines or pumps with cam-actuated distribution members at the outer ends of the cylinders F04B1/0472; machines or pumps with cam-actuated distribution members at the inner ends of the cylinders F04B1/0531; the piston-driving cams being provided with inlets and outlets F04B1/0535) - F04B 53/005: {Adaptations or arrangements of valves used as foot valves, of suction strainers, or of mud-boxes} - F04B 53/1087: {Valve seats} - F04B 53/125: {Reciprocating valves} - F16K 1/465: {to the valve seats} - F16K 25/005: {Particular materials for seats or closure elements} - F04B 2201/06: Valve parameters - Y10T 137/4273: Mechanical cleaning - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS - F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F) - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A frac pump valve seat assembly includes a seat body and a wiper seal. The seat assembly is configured to mitigate the risk of fluid end erosion in the valve seating area by automatically clearing or wiping the mating surface of the fluid end at the time of installation. The wiper seal is located at a lower portion of the seat body and is designed to interface therewith the mating surface of the fluid end. Upon installation, the wiper seal scrapes or cleans the mating surface of propellants, sand, and other contaminants that may remain after initial cleaning. The contact surface of the seat body is optionally further reinforced with material implants with greater hardness than the material of the seat body. ## Claims ### Claim 1 A valve seat assembly, comprising: a seat body having a central channel extending between an upper surface and a lower surface, the seat body having an outer diameter defined by an outer surface; and a wiper seal in communication with the lower surface of the seat body, the wiper seal having an seal diameter larger than the outer diameter of the seat body, the wiper seal configured to clean mating surfaces during assembly by wiping away contaminants prior to reaching the outer surface of the seat body. ### Claim 2 (depends on 1) The assembly of claim 1, wherein the seat body includes a recessed area for locating the wiper seal, the recessed area being an inward protrusion in the seat body. ### Claim 3 (depends on 2) The assembly of claim 2, wherein the recessed area is a notch. ### Claim 4 (depends on 2) The assembly of claim 2, wherein the recessed area is formed along the outer surface of the seat body. ### Claim 5 (depends on 2) The assembly of claim 2, wherein the recessed area is formed along the lower surface of the seat body. ### Claim 6 (depends on 1) The assembly of claim 1, wherein the wiper seal includes a base coupled to the seat body and a lip configured to extend away from the base. ### Claim 7 (depends on 6) The assembly of claim 6, wherein the wiper seal includes a groove between the base and the lip. ### Claim 8 (depends on 6) The assembly of claim 6, wherein the lip protrudes outward from the seat body. ### Claim 9 (depends on 6) The assembly of claim 6, wherein the lip includes a tip. ### Claim 10 (depends on 6) The assembly of claim 6, wherein the lip extends below the lower surface of the seat body. ### Claim 11 (depends on 6) The assembly of claim 6, wherein the lip is configured to flex about the base. ### Claim 12 (depends on 1) The assembly of claim 1, wherein the wiper seal extends below the lower surface of the seat body. ### Claim 13 (depends on 1) The assembly of claim 1, wherein the wiper seal is configured to flex inward and outward such that the seal diameter is configured to change in response to pressure. ### Claim 14 (depends on 1) The assembly of claim 1, wherein the wiper seal contacts the seat body around the entire periphery of at least one of the outer surface and the lower surface. ### Claim 15 (depends on 1) The assembly of claim 1, further comprising: a material implant recessed into an internal surface of the central channel, the central channel being openly tapered to an upper surface of the seat body. ### Claim 16 (depends on 15) The assembly of claim 15, wherein the material implant is formed from a material with a hardness greater than the hardness of the seat body. ### Claim 17 (depends on 15) The assembly of claim 15, wherein the material implant is flush with the internal surface of the central channel. ### Claim 18 (depends on 1) The assembly of claim 1, wherein the material implant is secured in the seat body via at least one of a bonding process and a heat shrunk process.