公开(公告)号：US08539976B1

公开(公告)日：2013-09-24

申请号：US13233106

申请日：2011-09-15

Applicant: Doyle Wayne Rodgers, Jr. ,  James Otis Miller

Inventor： Doyle Wayne Rodgers, Jr. ,  James Otis Miller

IPC: F16K15/06

CPC classification number: F16K15/066 ,  E21B34/02 ,  Y10T137/7838 ,  Y10T137/7939

Abstract: A back pressure valve for providing a double barrier to flow for use with a tubing hanger within a well bore, wherein the back pressure valve can have a first body piece threadably engaged and sealed with a second body piece. A first piston can engage a first surface for sealing bottom pressure to provide a first barrier to flow. A second piston can engage a second surface for redundantly sealing bottom pressure to provide a second barrier to flow. The back pressure valve can have one-way and two-way back pressure valve assemblies. The two-way back pressure valve assembly can include a bidirectional piston having a double sealing face for engaging sealing surfaces and sealing bottom pressure from the well bore while allowing testing without stopping a flow of fluid.

Abstract translation: 一种背压阀，用于提供与井筒内的管道悬挂器一起使用的流动的双重屏障，其中所述背压阀可以具有与第二主体件螺纹接合和密封的第一主体部件。 第一活塞可接合第一表面以密封底部压力以提供流动的第一屏障。 第二活塞可以接合第二表面以冗余地密封底部压力以提供流动的第二阻挡层。 背压阀可以具有单向和双向背压阀组件。 双向背压阀组件可以包括双向活塞，其具有用于接合密封表面的双重密封面并且密封来自井眼的底部压力，同时允许测试而不停止流体流动。