Petroleum Technology Company As

Schlumberger Norge As

Øyvind Stokka

Erling Kleppa

Magnar Tveiten

Ole Sevheim

Tom Norland

Helge Krohn

A valve system for use in a wellbore includes a side pocket mandrel and one or more well tools, where the side pocket mandrel includes an elongated body section provided with a connector at its ends, the elongated body section being provided with a substantially fully open main bore for alignment with the well tubing and an offset side pocket bore. At least one through opening is provided in the side pocket mandrel, leading into the side pocket bore, and at least one through opening is provided in the internal wall, leading into the main bore, where the at least two openings are in fluid communication through the side pocket bore, in which side pocket bore at least two valves are arranged in series to form a double fluid barrier between the main bore and an outside of the pocket mandrel, the at least two valves being independently retrievable through at least one installation opening arranged in the internal wall of the side pocket mandrel.

Valve system

A valve () having at least one flange portion () for securing to a wellhead Christmas tree () for shutting off a pipe outlet () from the wellhead Christmas tree (). At least one of the flange portions () includes integrated devices () for operation of a second unit () mounted outside the valve ().

Valve device of a wellhead Christmas tree assembly

The present invention relates to a valve system for use in a wellbore, the system comprising a side pocket mandrel and one or more well tools, where the side pocket mandrel () comprises an elongated body section () provided with connection means () at its ends, the elongated body section () being provided with a substantially fully open main bore () for alignment with the well tubing () and an offset side pocket bore (). At least one through opening () is provided in the side pocket mandrel (), leading into the side pocket bore (), and at least one through opening () is provided in the internal wall (), leading into the main bore (), where the at least two openings () are in fluid communication through the side pocket bore (), in which side pocket bore () at least two valves () are arranged in series to form a double fluid barrier between the main bore () and an outside of the pocket mandrel (), the at least two valves () being independently retrievable through at least one installation opening arranged in the internal wall () of the side pocket mandrel ().

The invention relates to a valve device that is used in oil and gas wells. The valve device has an external housing (), where at least one inlet () in the housing () is connected to an outlet () through a longitudinal bore in the housing longitudinal direction. Between the valve device's inlet and outlet there is mounted a valve seat () in the bore, where a valve body () shuts off the connection between the inlet and outlet. The valve body's position is controlled by a support (), connected with a pressure-sensitive bellows device () comprising an upper and a lower bellows element (). When the lower bellows element is compressed in the valve device's axial direction, the compression will cause the two bellows elements'impact elements to be moved relative each other in order to lift the valve body out of abutment with the valve seat.

Bellows valve

Present invention regards a device for injection and stimulation of fluids in a wellbore, where the device is typically is installed in Christmas trees, wellheads or subsea. The device comprises two separable sections, where the section that is mounted/arranged within the Christmas tree or wellhead, will remain in a closed position even if the other section due to external forces is broken off or in other ways is damaged.

Device for injection and stimulation of fluids in a well bore

The present invention regards a device designed for injection of fluids in a well bore, typically an offshore well bore for petroleum production and gas injection/gas lift system for fluid injection. The device comprises a outer hollow housing () with an internal body () moveable within the outer housing () with an internal bore () which in a first closed position is closed with a metal to metal seal system between the outer housing () and the internal body (), which internal body () is operated by pressure differential across the internal body (), where the internal body () is designed with slots () forming outlets of the internal bore () which in an open position of the device is positioned outside of the outer housing ().

Fluid injection device

The present invention regards a device designed for injection of fluids in a well bore, typically an offshore well bore for petroleum production and gas injection/gas lift system for fluid injection. The device comprises a outer hollow housing with an internal body moveable within the outer housing which in a first closed position is closed with a metal to metal seal system between the outer housing and the internal body, which internal body is operated by pressure differential across the internal body. The internal movable body is connected to the outer hollow housing by means of a retainer key. The retainer key comprises a shear arrangement and is arranged to keep the valve in a fixed closed position, where fluid pressure is to overcome the pretension of the retainer key in order to open the device. When the device is shear opened, it can be kept in this open position as the retainer key is locked to the outer hollow housing.

Shear open valve

The invention comprises a sealing body () separating device) which can be used to separate fluids in risers used in offshore oil production from drilling vessels at the sea surface. The invention is characterized in that the sealing body () can be placed in position above the wellhead () using several appropriate methods and, in an especially preferred application, by utilizing an installation tool () which is not sealing against the inner wall of the riser and which contains a suitable positioning means (), and that the body () which forms a seal against the inner wall of the riser separates fluids during the replacement of drilling fluid with water and of water with drilling fluid. The body () can be displaced using hydraulic force upwards in the longitudinal direction of the riser in that fluid is pumped at a relatively high pressure down the externally located smaller pipes () of the riser. The body can be used while the drilling vessel () heaves relative to the seabed (), and it is independent of the drilling vessel's drawers for the drill string () while the fluid is being replaced.

Separating device

The present invention regards a device designed for injection of fluids in a well bore, typically an offshore well bore for petroleum production and gas injection/gas lift system for fluid injection. The device comprises a outer hollow housing () with an internal body () moveable within the outer housing () with an internal bore () which in a first closed position is closed with a metal to metal seal system between the outer housing () and the internal body (), which internal body () is operated by pressure differential across the internal body (), where the internal body () is designed with slots () forming outlets of the internal bore () which in an open position of the device leads to the outside of the outer housing ().

Growing community of inventors

Sandnes, Norway

Øyvind Stokka