Abstract: Disclosed herein is a acoustic concentration of particles in a fluid flow that includes a substantially acoustically transparent membrane and a vibration generator that define a fluid flow path therebetween. The fluid flow path is in fluid communication with a fluid source and a fluid outlet and the vibration generator is disposed adjacent the fluid flow path and is capable of producing an acoustic field in the fluid flow path. The acoustic field produces at least one pressure minima in the fluid flow path at a predetermined location within the fluid flow path and forces predetermined particles in the fluid flow path to the at least one pressure minima.

Abstract: A ram packer for a hydraulic blowout preventer is provided that includes a steel reinforced hard elastomeric body which has a recess in the packer face for receiving a replaceable wear insert having shoulders on the insert surfaces that are relieved. By relieving the shoulders of the configuration where they come into contact with the ram packer, a projection is created to make contact with the ram packer while leaving an elastomer flow pathway for the reservoir elastomer of the ram packer. This projection does not inhibit rotation of the wear insert, but is a spacer to hold a portion of the insert away from the back of the ram packer. The wear insert may be made of various materials according to the service in which used.

Abstract: A ram packer for a hydraulic blowout preventer is provided that includes a steel reinforced hard elastomeric body which has a recess in the packer face for receiving a replaceable wear insert having shoulders on the insert surfaces that are relieved. By relieving the shoulders of the configuration where they come into contact with the ram packer, a projection is created to make contact with the ram packer while leaving an elastomer flow pathway for the reservoir elastomer of the ram packer. The wear insert has a multi-sided insertion surface which corresponds to the recess in the packer surface. This projection does not inhibit rotation of the wear insert, but is a spacer to hold a portion of the insert, particularly the shoulders, away from the back of the ram packer, where the shoulders can engage the back of the ram packer and inhibit the elastomer flow. The wear insert may be made of various materials according to the service in which used.

Abstract: A ram packer for a hydraulic blowout preventer is provided that includes a steel reinforced hard elastomeric body which has a recess in the packer face for receiving a replaceable wear insert. The wear insert includes a substantially square insertion surface which corresponds to the recess in the packer surface. The substantially square insertion surface prevents rotation of the wear insert when it engages a rotating pipe passing through the blowout preventer. The wear insert may be made of various materials according to the service in which used.