Abstract: Devices for controlling the flow of fluids past a location in a wellbore and methods for using such devices are disclosed. Embodiment devices are configured such that the throughbore is maximized because of the devices' thin cross sectional length. The devices disclosed may use balls, darts or other plugs to seal against a plug seat and prevent flow therethrough, external seals prevent flow therearound and gripping elements, such as slips, prevent movement of the device within the well. Relatively high pressure rating may be accomplished with such thin cross sections by keeping the length of mandrel wall exposed to such pressures short. Some embodiment devices may have a plug seat that is integral, at least in part, with a setting ring and/or have a setting ring that is of one piece with the mandrel.

Abstract: Devices for controlling the flow of fluids past a location in a wellbore and methods for using such devices are disclosed. Embodiment devices are configured such that the throughbore is maximized because of the devices' thin cross sectional length. The devices disclosed may use balls, darts or other plugs to seal against a plug seat and prevent flow therethrough, external seals prevent flow therearound and gripping elements, such as slips, prevent movement of the device within the well. Relatively high pressure rating may be accomplished with such thin cross sections by keeping the length of mandrel wall exposed to such pressures short. Some embodiment devices may have a plug seat that is integral, at least in part, with a setting ring and/or have a setting ring that is of one piece with the mandrel.