Abstract: A subsea grease injection system has a grease accumulator containing a supply of grease, a hydraulic accumulator, a flowline connected to an outlet of the grease accumulator so as to allow discharge of grease from the supply to flow therethrough, and a subsea structure connected to the flowline. The hydraulic accumulator is in fluid communication with the grease accumulator such that the displacement of hydraulic fluid from the hydraulic accumulator causes a corresponding discharge of grease from the grease accumulator. The subsea structure receives grease from the flowline. The grease accumulator is a piston and cylinder in which the piston is received in the cylinder to define first and second compartments. The supply of grease is in the first compartment. The hydraulic fluid fills an interior of the second compartment. This avoids the use of hydraulic conduits from the surface such that only power and communications are from the surface.

Abstract: A dynamically positioned vessel (DPV) is located above an injection well, inject water or other fluids temporarily or for a short period of time, adjust the injection parameters, and either continue operating for the life of the system or as long as required to add permanent facilities on another platform. The DPV is connected to the potential injection well via a hybrid riser system. The hybrid riser system includes a rigid portion and a flexible portion. Injection using the DPV and the hybrid rise system can be more economical than injection using a conventional mobile offshore drilling unit (MODU) and a rigid riser.

Abstract: A dynamically positioned vessel (DPV) is located above an injection well, inject water or other fluids temporarily or for a short period of time, adjust the injection parameters, and either continue operating for the life of the system or as long as required to add permanent facilities on another platform. The DPV is connected to the potential injection well via a hybrid riser system. The hybrid riser system includes a rigid portion and a flexible portion. Injection using the DPV and the hybrid rise system can be more economical than injection using a conventional mobile offshore drilling unit (MODU) and a rigid riser.

Abstract: A gasket for use with flanges has an annular member formed of a metallic material. The annular member has a cross-sectional profile with a body portion having an end surface, a first side, a second side, and a T-shaped portion extending from the body portion. The T-shaped portion of the body portion defines a pair of annular grooves on opposite sides of the annular member. The T-shaped portion has a central portion connected to the body portion and a head portion at an end of the central portion opposite the body portion. The central portion of the T-shaped portion has a weep hole extending therethrough. The weep hole has opposite ends opening respectively to the pair of annular grooves.

Abstract: A process for removing hydrate formations from a flowline includes connecting a manifold to the flowline, passing an inert gas across a pair of inlets of the manifold so as to create a reduced pressure across the pair of inlets that is less than a pressure of a fluid in the flowline, opening a valve between the pair of inlets and the flowline so as to expose the pressurized fluid in the flowline to the reduced pressure across the pair of inlets, disassociating hydrates in the flowline by exposure to the reduced pressure across the pair of inlets, and flowing the fluid and the disassociated hydrates from the flowline into the outlet of the manifold and outwardly of the manifold through at least one of the pair of inlets.

Abstract: A gasket for use with flanges has an annular member formed of a metallic material. The annular member has a cross-sectional profile with a body portion having an end surface, a first side, a second side, and a T-shaped portion extending from the body portion. The T-shaped portion of the body portion defines a pair of annular grooves on opposite sides of the annular member. The T-shaped portion has a central portion connected to the body portion and a head portion at an end of the central portion opposite the body portion. The central portion of the T-shaped portion has a weep hole extending therethrough. The weep hole has opposite ends opening respectively to the pair of annular grooves.

Abstract: An apparatus for effecting injection of fluids into a subsea horizontal tree includes a fluid injection tree cap having a body with a bore extending therethrough so as to open at one end to a top of the body. An isolation valve is cooperative with the bore of the body so as to open or close fluid flow through the bore. The fluid injection tree cap is connected to the horizontal subsea tree. The horizontal subsea tree has only a single crown plug therein. The bore of the fluid injection tree cap communicates with an annulus of the horizontal subsea tree. The horizontal subsea tree has valving therein so as to selectively direct fluid from the bore of the tree cap to the annulus of the well or to the horizontal subsea tree.

Abstract: A subsea chemical injection system has a subsea structure, a manifold connected by jumper to the subsea structure, a coiled tubing, a disconnect mechanism affixed to the coiled tubing, and a hose extending from the disconnect mechanism to the manifold such that the chemical flowing through the coil tubing can selectively flow through the disconnect mechanism and through the hose to the subsea structure. The disconnect mechanism is adapted to selectively release from the hose. The disconnect mechanism has a connector affixed thereto. A hydraulic fluid supply is connected to the connector so as to selectively release the connector from the hose. Control lines can extend from a surface location to a control module and the disconnect mechanism for selectively delivering for receiving signals from the subsea structure.

Abstract: A subsea connection system for connecting to a hub has a body with an interior passageway suitable for allowing fluids to flow therethrough, a collet having a plurality of collet segments that are movable between a locked position and an unlocked position, an outer sleeve overlying the collet, and a translator cooperative at the outer sleeve so as to move the outer sleeve between a first position and a second position. The plurality of collet segments are in the unlocked position when the outer sleeve is in the first position. The plurality of collet segments are in the locked position when the outer sleeve is in the second position. The locked position is adapted to secure the body in connection with the hub.

Abstract: A subsea connection system for connecting to a hub has a body with an interior passageway suitable for allowing fluids to flow therethrough, a collet having a plurality of collet segments that are movable between a locked position and an unlocked position, an outer sleeve overlying the collet, and a translator cooperative at the outer sleeve so as to move the outer sleeve between a first position and a second position. The plurality of collet segments are in the unlocked position when the outer sleeve is in the first position. The plurality of collet segments are in the locked position when the outer sleeve is in the second position. The locked position is adapted to secure the body in connection with the hub.

Abstract: A subsea chemical injection system has a subsea structure, a manifold connected by jumper to the subsea structure, a coiled tubing, a disconnect mechanism affixed to the coiled tubing, and a hose extending from the disconnect mechanism to the manifold such that the chemical flowing through the coil tubing can selectively flow through the disconnect mechanism and through the hose to the subsea structure. The disconnect mechanism is adapted to selectively release from the hose. The disconnect mechanism has a connector affixed thereto. A hydraulic fluid supply is connected to the connector so as to selectively release the connector from the hose. Control lines can extend from a surface location to a control module and the disconnect mechanism for selectively delivering for receiving signals from the subsea structure.

Abstract: A production apparatus for use with a subsea wellhead has a tubing head spool and a vertical tree. The tubing head spool has an end suitable for connection to the wellhead. The tubing head spool has a production bore extending therethrough and a tubing hanger arranged therein. The vertical tree has a tree connector at a lower end thereof. The vertical tree has flowline extending therethrough. The tree connector is affixed to a tubing head mandrel of the tubing head spool. The flowline is in valved communication with the production bore of the tubing head spool. The flowline extends outwardly of a vertical tree so as to allow a flow of production fluids outwardly of the vertical tree. The tubing head spool is a horizontal Christmas tree with master flow line and the annulus line sealed closed.

Abstract: A system for diverting fluids from a wellhead in a subsea environment has a capping stack with a connector suitable for connection or interconnection to the wellhead, a flow base fixedly positioned in the subsea environment, and a conduit connected to the outlet of a diverter line of the capping stack and connected to the inlet of an interior passageway of the flow base. The conduit is suitable for passing fluids from the capping stack toward the flow base. The flow base is a modified horizontal Christmas tree. The interior passageway within the horizontal Christmas tree has a plug therein located a level below the level of the inlet to the flow base. The flow base can be attached to a wellhead or to an anchor pile in the subsea environment.