Patent ID: 9567834
Date: 2017-02-14
CPC Classifications: E21B

Claim:
1. A method of performing an operation on a well conduit, comprising: (a) providing a valve assembly that has an open position and a closed position, the valve assembly having a tubular central body and being biased to the closed position; (b) providing a running tool assembly with a downward extending stinger, the valve assembly being installed and fixed to the well conduit with the stinger extending through the central tubular body of the valve assembly, an outer diameter of the stinger sealingly being engaged with an inner diameter of the tubular central body through an annular seal interface located axially between a pair of flapper valve elements of the valve assembly, holding the valve assembly in the open position, wherein the seal interface includes a seal in constant sealing engagement within an annular groove in the inner diameter of the tubular central body of the valve assembly; (c) placing the running tool assembly and the valve assembly into engagement with the well conduit; (d) performing a selected operation on the well conduit with the running tool assembly, including pumping a fluid through the stinger holding the valve assembly in the open position; then (e) lifting the stinger from the valve assembly, causing the valve assembly to move to the closed position.