Trim insert for choke assembly

Details Trim insert for choke assembly Trim insert for choke assembly

2006-02-28

2006-02-28

Bastianelli, John (Department: 3751)

Valves and valve actuation

With material guide or restrictor

Movable or resilient guide or restrictor

C137S375000, C251S360000

Reexamination Certificate

active

07004448

ABSTRACT:
A trim insert for a choke assembly is disclosed, wherein the trim insert is a tubular member with a substantially constant inner diameter. A first end of the device is positioned within an adjacent upstream sleeve and a second end is sealingly retained within the discharge channel of the choke assembly. A flange coaxially retains the tubular member between the sleeve and a shoulder of the choke body. The trim insert is made of an erosion resistant material, such as tungsten carbide, hardened steel, or a ceramic. Additionally, the inner surface of the tubular member may be coated with a hardening compound to provide additional erosion resistance.

REFERENCES:
patent: 4337788 (1982-07-01), Seger
patent: 4355784 (1982-10-01), Cain
patent: 4503878 (1985-03-01), Taylor
patent: 4732364 (1988-03-01), Seger et al.
patent: 4735229 (1988-04-01), Lancaster
patent: 5133383 (1992-07-01), King
patent: 5201491 (1993-04-01), Domangue
patent: 6253787 (2001-07-01), Suter et al.
patent: 6446664 (2002-09-01), Parsons

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