· The Pressure Actuated Sleeve Shifting Tool (PASST) is a shifting tool used to open sliding sleeves by applying tubing pressure and maintaining a positive tubing pressure.

· Use with the APCV-3 to have a traditionally operated sliding sleeve after the PASST has shifted the sleeve the first time.

Application

The PASST with the APCV-3 was design to be used inside the screens of a gravel pack completion. When the gravel pack washpipe is pulled out, the WSST-2 or WSST-1 shifts the Support Collet out from supporting the Lock Collet Insert. Now the PASST is able to shift sliding sleeve whenever the tubing is pressured up.

 

PASST Benefits:

· Support Collet Permits Tubing Pressure Without Premature Shifting of Sleeve.

o Gravel packing ability. Support/Lock collet prevents pumping pressures prematurely shifting the sleeve in single zone applications.

o Test concentric string. Support/Lock collet permits testing the integrity of the concentric string after the Gravel Pack without prematurely shifting the sleeve.

o Shift support collet with shifting tool attached to wash pipe

 

· Tubing Pressure Actuated. Does not require ‘negative’ tubing pressure to shift the sleeve.

o Sleeve can shift with ‘positive’ tubing pressure.

o Eliminate need for slick line run. Since the sleeve is shifted with positive tubing pressure there is no need to make an additional slick line trip.

o Hydraulics system is locked into place after sleeve is shifted.

 

· PASST Ratings

o 17,000 psi maximum absolute pressure.

o 300°F maximum temperature rating.

 

· APCV-3 Advantages

o APCV-3 operates as traditional (up to open and down to close) APCV sleeve after being hydraulically opened.

o Uses the same shifting tool to remove support collet and shift sleeve in later operations.