| 摘要 |
A tubing hanger landing system includes a tubing hanger running tool, a locking flowline to lock the tubing hanger running tool into a tubing hanger, and a lower body shear joint having a recovery valve. The recovery valve includes a valve body having an operational port, a bi-directional port, and a relief port and an internal piston cavity. The piston cavity includes a radially inwardly extending stop, a valve piston housed in the valve body piston cavity and partially extending through the radially inwardly extending stop and movable between an operational position and a relief position by moving relative to the radially inwardly extending stop. The valve piston includes a radially extending collar. The valve body further includes a shear port that allows pressure communication between the exterior of the recovery valve and the valve piston, a shear ring attached and surrounding the piston collar and sized larger than the radially inwardly extending stop such that the valve piston is prevented from moving from the operational position to the relief position. The shear ring is shearable from the valve piston when subjected to a pressure of the exterior of the recovery valve through the shear port that exceeds a shear force of the shear ring, allowing the valve piston to be movable to the relief position. In the relief position, the valve piston provides fluid communication through a relief flowpath between the bi-directional port and the relief port to release pressure from the locking flowline. |
