Patent ID: 7455105
Filing Date: 2008-11-25
Classification: E21B

Abstract:
1. Hanger means for installing and suspending coiled tubing in an oil and/or gas well, comprising: a tubing head adapted to be mounted on a wellhead of the well and having a vertical passage therethrough; a hydraulically operated activation piston disposed in an upper portion of said vertical passage in a sliding seal relation for vertical movement therein between a raised position and a lowered position, said piston having a central longitudinal bore extending downward from a top end and an adjoining downward and outward tapered conical lower end portion through which the coiled tubing may be raised and lowered; a fluid entry port disposed in fluid communication between the exterior of said tubing head and said vertical passage and said piston for connection to a source of hydraulic fluid for moving said piston between said raised and said lowered positions; an annular sealing assembly supported in a lower portion of said vertical passage including a continuous annular seal member having a central bore through which the coiled tubing may be raised and lowered, and an exterior with an upwardly and inwardly truncated conical upper portion, said sealing member capable of deforming when a vertical force is applied thereto to form a sealing relation between surrounding surfaces of said tubing head and the exterior of the coiled tubing; a slip support cup slidably disposed in said vertical passage having an interior with a lower conical surface that tapers upward and inwardly from a bottom end terminating in a radial shoulder, an upper conical surface that tapers downward and inwardly from a top end terminating in a central bore that extends through said radial shoulder, and through which the coiled tubing may be raised and lowered, said lower conical surface and radial shoulder supported on said seal member conical upper portion; a contractible double tapered slip assembly disposed between said piston conical lower end portion and said slip support cup upper conical surface including slip segments having an exterior with an upwardly and inwardly tapered frusto-conical upper portion and a downwardly and inwardly tapered frusto-conical lower portion, said slip segments movable between a radially outward expanded position allowing the coiled tubing to be raised and lowered therethrough and a radially inward contracted position engaged on the coiled tubing; wherein said activation piston, when subjected to sufficient hydraulic fluid pressure from a source exterior of said tubing head, is moved to its said lowered position to engage said slip assembly between said piston conical lower end portion and said slip support cup upper conical surface and contract said slip segments radially inwardly to grip and support the weight of the coiled tubing and the weight of the tubing is transferred from said slip assembly through said slip support cup to said sealing member to apply a vertical force thereto deforming said seal member to form a sealing relation between the exterior of the coiled tubing and surrounding surfaces of said tubing head.