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Dart valve with centralizer

  • US 10,641,062 B1
  • Filed: 02/12/2019
  • Issued: 05/05/2020
  • Est. Priority Date: 02/12/2019
  • Status: Active Grant
First Claim
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1. A dart valve, comprising:

  • a housing defining a valve volume in fluid communication with an inlet and an outlet;

    a cone seat disposed within the valve volume between the inlet and the outlet and comprising a seat surface;

    an inlet centralizer disposed within the valve volume between the inlet and the cone seat, the inlet centralizer comprising;

    an inlet centralizer body;

    an inlet centralizer channel extending axially through the inlet centralizer body; and

    a plurality of flow channels disposed circumferentially around the inlet centralizer channel; and

    an exit centralizer disposed within the valve volume between the cone seat and the outlet, the exit centralizer comprising;

    an exit centralizer body comprising an axial seat, wherein a cone body comprising a cone surface is configured to abut the axial seat when the cone body is spaced apart from the cone seat, such that the axial seat prevents oscillation of the cone body or further axial movement of the cone body away from the cone seat; and

    an exit centralizer channel extending axially through the exit centralizer body, wherein the exit centralizer channel is spaced radially inward from the axial seat, such that an annular volume is disposed between the axial seat and the exit centralizer channel;

    a cone assembly axially moveable relative to the cone seat, the cone assembly comprising;

    the cone body;

    a biasing member in engagement with the cone body, and disposed within the annular volume between the axial seat and the exit centralizer channel, wherein the biasing member is configured to bias the cone body toward the cone seat to sealingly engage the cone surface with the seat surface to prevent flow from the outlet to the inlet, and to compress to axially space the cone surface apart from the seat surface to permit flow between the inlet and the outlet; and

    an inlet stem axially extending from the cone body and at least partially into the inlet centralizer channel to constrain radial movement of the cone body.

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