Pressure testing valve and method of using the same

摘要

A wellbore servicing system and method are disclosed. The wellbore servicing system includes a casing string, a pressure testing valve, and a floating piston assembly. The pressure testing valve includes a housing and a sliding sleeve. The floating piston assembly is slidably disposed between the housing and the sliding sleeve. The sliding sleeve is slidably positioned within the housing and is transitional from a first position to a second position and from the second position to a third position. When the sliding sleeve is in the first or second positions, it blocks fluid communication via ports in the housing.

主权项

1. A wellbore servicing system comprising:
a casing string; and a pressure testing valve, the pressure testing valve incorporated within the casing string and comprising:
a housing comprising one or more ports and an axial flowbore;a sliding sleeve, wherein the sliding sleeve is slidably positioned within the housing and transitional from:
a first position to a second position, and from the second position to a third position;wherein, when the sliding sleeve is in the first position and the second position, the sliding sleeve blocks a route of fluid communication via the one or more ports and, when the sliding sleeve is in the third position the sliding sleeve does not block the route of fluid communication via the one or more ports;wherein the pressure testing valve is configured such that application of a fluid pressure of at least an upper threshold to the axial flowbore causes the sliding sleeve to transition from the first position to the second position; andwherein the pressure testing valve is configured such that a reduction of the fluid pressure to not more than a lower threshold applied to the axial flowbore causes the sliding sleeve to transition from the second position to the third position; and a floating piston assembly slidably disposed between the housing and the sliding sleeve, wherein the floating piston assembly is configured such that,
when inactivated, the floating piston assembly will not apply a force to the sliding sleeve in either the direction of the second position or in the direction of the third position, andwhen activated, the floating piston assembly will apply a force to the sliding sleeve in the direction of the third position and a locking system comprising a lock and locking groove configured to retain the sliding sleeve in the third position.