Invention Grant
- Patent Title: Slow-shift SPM valve
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Application No.: US14704771Application Date: 2015-05-05
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Publication No.: US10337638B2Publication Date: 2019-07-02
- Inventor: James Ray Landrith, II , Frank B. Springett , Eric Trevor Ensley , Jonathan Lewis Buelow , James W. Weir , Travis James Miller
- Applicant: NATIONAL OILWELL VARCO, L.P.
- Applicant Address: US TX Houston
- Assignee: National Oilwell Varco, L.P.
- Current Assignee: National Oilwell Varco, L.P.
- Current Assignee Address: US TX Houston
- Agency: Conley Rose, P.C.
- Main IPC: F16K31/06
- IPC: F16K31/06 ; F16K3/24 ; F16K31/122 ; F16K47/02 ; F16K11/044

Abstract:
The disclosure provides devices and methods for controlling the actuation rates of SPM valves by bi-directionally controlling the fluid which actuates the valve or by maintaining enclosed volumes which communicate with each other through predetermined restrictions as the valve actuates. These enclosed volumes can be completely isolated, depth compensated, share fluid with the pilot actuating fluid, or utilize the main system fluid. The restrictions can be modified to increase or decrease the actuation rates of the SPM valve. The disclosure also provides control over the main system fluid passage opening and closing positions as well as how rapidly the flow passage areas increase or decrease while opening or closing the valve.
Public/Granted literature
- US20160153578A1 Slow-Shift SPM Valve Public/Granted day:2016-06-02
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