Retrievable packer apparatus

Abstract

An apparatus comprising a mandrel (51, 251, 351) having a main longitudinal direction and defining a throughbore in that direction and a packer element (52, 352) mounted thereon. A seal bore extension (122) is attached, directly or indirectly, to the mandrel, and defines a bore (122b) in the main longitudinal direction. A floating seal (60) is provided between the bore of the seal bore extension and an internal moveable tube/stinger (120). A bypass channel (54, 254) extends across the packer element between an upper bypass port (50U, 250U) and a lower bypass port (50L, 250L), generally in said longitudinal direction. A bypass valve (55, 255) controls said upper or lower bypass port. The valve may move more than once and may be a multi-cycle valve. An electronic communication device (56a, 256) comprising a wireless receiver is configured to receive wireless signals such as EM or acoustic, to control the bypass valve. In this way the safety of well testing can be improved.

Dependencies are inferred from the claim text.