Back to results
US 12,760,728 B2Granted
Fluid end plug with bore clearance
AssigneeKerr Machine Co.
InventorsMark S. Nowell, Kelcy Jake Foster, Christopher Todd Barnett
Life of this patent
Estimating the term…
Abstract
A closure for a fluid end having a middle sealing section which engages a seal. The sealing section either has a larger outer diameter than adjacent sections or contacts a bore with a smaller inner diameter than adjacent sections. In either case, the clearance formed on either side of the sealing section reduces friction and allows the closure to be rocked back and forth to insert and remove the closure from the fluid end bore.
Claims14
A fluid end, comprising:
- a body having a bore formed therein;
- a valve pair situated within the bore;
- an annular groove formed in a wall surrounding the bore;
- a seal disposed in the annular groove;
- and
- a plug disposed within the bore, the plug comprising:
- a plug body joined to a flange section, the plug body comprising:
- a first section having a first diameter;
- a second section having a second diameter;
- a third section having a third diameter;
- and
- a protrusion extending from the third section, the protrusion having a fourth diameter;
- in which the seal is in contact with and surrounds the plug body at the second section;
- in which the second section is positioned intermediate the first and third sections;
- in which the second diameter is greater than both the first and third diameters;
- and
- in which both the first and third diameters are greater than the fourth diameter.
14 more elements
A fluid end, comprising:
- a housing having a bore formed therein;
- a seal situated within a wall surrounding the bore;
- a first plug situated at least partially within the bore, the first plug comprising:
- a body, comprising:
- a first section defining a first maximum diameter;
- a second section defining a second maximum diameter;
- a third section defining a third maximum diameter, the third section situated within the bore;
- and
- a protrusion extending from the first section, the protrusion having a fourth maximum diameter;
- in which the fourth maximum diameter is smaller than the first, second, and third maximum diameters;
- in which the second maximum diameter is greater than both the first and third maximum diameters;
- in which the second section is situated intermediate the first and third sections;
- in which the body engages the seal at only the second section;
- and
- in which the first section is installed further within the bore than the second and third sections.
12 more elements
Dependencies are inferred from the claim text.