| 摘要 |
A choke valve having flow trim components, namely a tubular cage and a flow collar or plug, and related components, designed and arranged for reduced fracturing. The invention includes a protective tubular sleeve, or insert cartridge in which the side ports are located to overlap with the intersection of axes of the inlet and outlet bores, but to avoid direct impingement of fluid along the axis of the inlet bore. In the cage, at least a pair of main flow ports are located to overlap with the intersection of the axes of the inlet and outlet bores, and are aligned with the side ports of the tubular sleeve or cartridge to communicate directly with the side ports. In this manner fluid may enter the choke valve through the inlet bore and pass through the main flow ports at reduced pressure and continue out through the outlet bore, without direct impingement on the side wall of the flow trim components.
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