Choke restrictor devices and methods

Fluid handling – Systems – Multi-way valve unit

Reexamination Certificate

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C251S118000

Reexamination Certificate

active

06886598

ABSTRACT:
Flow enhancing restrictors are located within a fluid conduit to provide pressure reduction and flow enhancement. The restrictors may be used in combination with a conventional choke valve or as a stand-alone pressure reduction means. Alternative exemplary embodiments for flow enhancers are described. Each of the flow enhancers has a generally cylindrical base with at least one fluid passage disposed therethrough. Each of the flow enhancers also provides a dome that projects upwardly from the center of the base to assist in directing fluid flow and receiving the abrasive forces associated with the fluid.

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Richter, R: “Hochverschleissfeste Stellventile”, VGB Kraftwerkstechnik, VGB Kraftwerkstechnik GMBH. Essen, De, vol. 77, No. 6, Jun. 1, 1997, pp. 476-480, XP000656701, ISSN: 0372-0575, Figure 2 (Translation of relevant portions of reference included).

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