Invention Grant
- Patent Title: Dual torsion springs flapper valve closure mechanism
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Application No.: US15110539Application Date: 2015-09-15
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Publication No.: US09909389B2Publication Date: 2018-03-06
- Inventor: Shaun Wen Jie Ng
- Applicant: Halliburton Energy Services, Inc.
- Applicant Address: US TX Houston
- Assignee: Halliburton Energy Services, Inc.
- Current Assignee: Halliburton Energy Services, Inc.
- Current Assignee Address: US TX Houston
- Agency: McDermott Will & Emery LLP
- International Application: PCT/US2015/050197 WO 20150915
- International Announcement: WO2017/048236 WO 20170323
- Main IPC: E21B34/10
- IPC: E21B34/10 ; F16K1/20 ; F16K31/56 ; E21B34/00

Abstract:
A flapper valve includes a body having first and second end, and a flapper pivotably coupled to the body and movable between a closed position, where the flapper prevents fluid flow through the body, and an open position, where fluid flow is allowed through the body. A first torsion spring is coupled to the body at the second end and provides a spring arm that engages and urges the flapper to the closed position. A support beam is coupled to the body and includes an axial extension that extends axially past the second end. A closure beam having a first beam end is pivotably coupled to the axial extension and a second beam end is engageable with the flapper. A second torsion spring is coupled to the axial extension and engageable with the closure beam to urge the closure beam into engagement with the flapper.
Public/Granted literature
- US20170226823A1 DUAL TORSION SPRINGS FLAPPER VALVE CLOSURE MECHANISM Public/Granted day:2017-08-10
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