Patent ID: 8561703
Filing Date: 2013-10-22
Classification: E21B,Y10T

Abstract:
1. An apparatus usable with a well comprising: a check valve housing that comprises a tubular receiver and outlets disposed about the tubular receiver; and a check valve arrangement defined by a valve element movable into and out of engagement with a valve seat, wherein the valve element comprises an elastic element and a body that comprises a recess wherein the body is slidably mounted in the tubular receiver, wherein the valve element has a first sealing structure engageable with a second sealing structure on the valve seat, wherein the first sealing structure includes a ring sealing member and a dome sealing member, wherein the dome sealing member comprises a domed portion and a stem seated in the recess of the body, wherein the ring sealing member comprises a sealing surface and a ring section, the ring section interposed between the domed portion of the dome sealing member and the body, wherein the elastic element biases the ring sealing member for axial movement with respect to the body, and wherein contact between the ring sealing member and the second sealing structure on the valve seat compresses the elastic element between the ring sealing member and the body.