Patent ID: 8955604
Filing Date: 2015-02-17
Classification: E21B

Abstract:
1. A well tool comprising: a hanger for landing in a wellhead; a hanger seal for sealing between the hanger and the wellhead: a hanger running tool having a stem for securing, to a running string, a stern flow passage extending axially through the stem relative to a longitudinal axis of the stern, a body releasably connected to the hanger, and a piston releasably connected to the hanger seal, the body and the piston being axially movable relative to each other and to the stem; a tubular receptacle sub defining a central bore having an upper end that couples to a lower end of the stem of the running tool; a sleeve in the central bore, the sleeve selectively moveable in the central bore from an upper position to a lower position; the sleeve having at least one bypass port extending from an exterior to an interior of the sleeve; at least one retainer securing the sleeve in the upper position; a sleeve seal on the sleeve above the bypass port that seals the exterior of the sleeve to the bore while the sleeve is in the upper position; a bypass passage in the bore of the sub having an upper inlet portion and a lower outlet portion in fluid communication with the bypass port, and having a cross-sectional flow area that is at least equal to a cross-sectional flow area of the central bore; a drop member adapted to be dropped through the running tool string and land on the sleeve, wherein the inlet portion of the bypass passage is blocked from fluid communication with the central bore by the sleeve seal when the drop member is located in the sleeve and the sleeve is in the upper position, enabling fluid to be pumped down the running string and through the stem at a first pressure level to the piston to set the hanger seal; and wherein the retainer is adapted to selectively release the sleeve in response to a second and greater pressure level in the stem flow passage so that the sleeve moves downward to the lower position, placing the bypass passage in fluid communication with the bore when the sleeve is moved to the lower position, allowing fluid communication from above the central bore through the bypass passage and the bypass port of the sleeve, enabling fluid in the running string and the stem flow passage to flow into and out the sleeve during retrieval of the running tool.