Patent ID: 9194209
Filing Date: 2015-11-24
Classification: E21B

Abstract:
1. A tool, comprising: an upper sub having a first end, a second end, and a bore defined therein; a body having a first end, a second end, and a bore defined therein, wherein the first end of the body is connected to the second end of the upper sub; a valve housing having a first end, a second end, and a bore defined therein, wherein the first end of the valve housing is connected to the second end of the body, the valve housing further having a shoulder formed on an inner diameter of the bore in the valve housing, the shoulder having a first sealing surface facing toward the first end of the valve housing and a second sealing surface facing the second end of the valve housing; a first sealing member at least partially disposed within the valve housing comprising a dome-shaped surface and a cylindrical base extending therefrom, wherein the cylindrical base of the first sealing member rests on the first sealing surface of the shoulder; a second sealing member at least partially disposed within the valve housing comprising a second dome-shaped surface and a second cylindrical base extending therefrom, wherein the cylindrical base of the second member surface rests on the second sealing surface so that wherein the dome-shaped surface of the first sealing member and the second dome-shaped surface of the second sealing member face away from one another; one or more first o-rings positioned between an inner surface of the valve housing and an outer surface of the cylindrical portion of the first sealing member, an outer surface of the cylindrical portion of the second sealing member, or both, wherein the one or more first o-rings is adapted to form a liquid-tight seal between the inner surface of the valve housing and the cylindrical portion of at least one of the first sealing member and the second sealing member; and a lower sub connected to the second end of the valve housing.