Polished Bore Receptacle (PBR)
Definition - What does Polished Bore Receptacle (PBR) mean?
Polished Bore Receptacle (PBR) is a device that is honed with the internal diameter of the sealing surface. It is mainly used in tieback casing and for landing a production tubing seal assembly. It is installed in a liner string to handle the liner-while-drilling service operations. It serves as the stem to isolate the hanger of the installed cementing system. Also, it isolates the liner ID from the formation pressure that forces out cement during the cementing process.
Petropedia explains Polished Bore Receptacle (PBR)
The Polished Bore Receptacle is specifically designed as an expansion joint that offers stroke length during production and well treatment. It acts as a cavity that provides pressurization while drilling. It is essential as it prevents liner collapse and gives a warning before any kind of failures during drilling. The holes present on the upper end of the Polished Bore Receptacle maintain the flow to the hanger during the drilling process.
The major advantages of Polished Bore Receptacle are:
- It provides a seal bore above liner.
- It encloses cementing systems seal stem.
- It isolates the hanger after the installation of the cementing system.
- It ensures isolation of liner string pressure.