Abstract: The present invention is directed to a sealing sleeve which is disposed in a lateral fluid conduit that extends at least partially through a tubing hanger and a surrounding spool and which is slideable between a retracted position for running and retrieval of the tubing hanger and an extended position for sealing across the interface between the tubing hanger and the spool.

Abstract: A shallow water flow subsea drilling system is disclosed. A wellhead system is provided with a 36″ conductor pipe in which a 26″ casing and 26″ wellhead housing are landed. The 26″ casing extends to a depth above a shallow water flow zone. A borehole through the shallow water flow zone is sized to accept a 20″ casing to the top of which is secured an 18¾″ wellhead housing. An annulus between the 26″ and 18¾″ housings communicates with cement returns from the 20″ casing. Flow-by holes in the 26″ wellhead housing are sealed with a retrievable seal assembly and actuating mechanism run on the same running tool with the 20″ casing and 18¾″ wellhead housing. A hydraulic feedback mechanism is provided to sense at the service vessel whether or not the seal assembly has been correctly positioned in the annulus.

Abstract: The invention is directed to a tubing hanger for a flow completion system which comprises a Christmas tree connected above a wellhead housing that includes a central bore in which the tubing hanger is supported, the tubing hanger comprising a generally annular body; a production bore which extends generally axially through the body; an annulus bore which extends generally axially through the body; the annulus bore comprising a generally lateral first branch which is connected to a generally axial second branch; and a closure member which includes a gate that is moveable generally axially across the first branch between an open position in which a hole in the gate is aligned with the first branch and a closed position in which the hole is offset from the first branch.

Abstract: A pitless adapter assembly for a water well system or the like operable by a pump suspended in the well below the pitless adapter assembly to pump underground water upwardly through a plastic supply pipe to a feed pipe through a fitting in a well casing, and including a housing having a generally right-angle flow path therein defined by an housing inlet and a housing outlet for interconnecting the supply pipe with the feed pipe through the well casing. The housing includes an integrally-formed eyelet for receiving and retaining a safety cable to which the pump is suspended in the well and a plurality of annular serrations formed in the walls of the housing surrounding the housing inlet for receiving and retaining an upper end of the feed pipe. Interior walls of the housing defining the flow path extend between the housing inlet and the housing outlet and are curved to provide right-angle turn which reduces turbulence in the water flowing through the housing from the supply pipe to the feed pipe.

Abstract: A well production assembly includes a production tree which has a lateral production passage extending laterally from a vertical bore of the tree. A tubing hanger, also having a lateral production passage, lands in the tree, with the lateral passages registering with each other. The junction of the lateral passages has flat, tapered sealed areas which mate with one another. An annulus passage extends vertically through the tubing hanger offset from and parallel to the tubing hanger vertical production passage. The annulus passage also has a lateral passage which registers with the lateral passage formed in the tree. The annulus lateral passages have a flat seal area at their junction. The tubing hanger has a downward facing hydraulic connector which registers with an upward facing hydraulic connector located on a shoulder formed in the bore. Once mated, the connectors provide hydraulic or other auxiliary fluid communication to downhole equipment.

Abstract: A tubular wellhead member has an inner seal surface. A hydraulic passage extends through the wellhead member and terminates at a port at the seal surface. A tubing hanger having an outer mating surface lands in the wellhead member. A hydraulic line extends from a hydraulically operated downhole safety valve to a passage in the tubing hanger and terminates at a tubing hanger port. A seal is located at the tubing hanger port for sealing the junction with the tubular member port. A check valve is located within the seal to maintain the tubing hanger fluid passage closed until the tubing hanger lands in the wellhead. An adapter is employed to apply a running-in hydraulic fluid pressure to the tubing hanger hydraulic fluid passage with the check valve open. Then, the adapter closes the check valve to trap hydraulic fluid pressure in the line leading to the downhole safety valve. This pressure is sufficient to maintain the downhole safety valve in an open position during running in.

Abstract: Secured to an exterior surface of a well casing having an aperture formed therein is a first unit including a horizontal fluid passage receiving a horizontal pipe and extending through a generally annular seat in registration with the aperture. A second unit is disposed within an interior surface of the wall casing for supporting a vertical pipe and pump assembly and includes a generally planar flange adapted to be slidably received in a blind channel of the first unit at an angle relative to the longitudinal axis of the well casing so as to provide a continuous fluid passage between the vertical pipe and the horizontal pipe. The annular seat of the first unit is completely recessed from the inner surface of the well casing such that upon release of the second unit from the first unit, the second unit and its pump assembly are movable in a totally obstruction-free path through the interior surface of the well casing.