EQUINOR ENERGY AS

There is provided a method for testing a valve of a subsea tree. The method comprises: closing the valve to be tested; fluidly isolating an isolatable region of the subsea tree directly adjacent to the valve to be tested; after being isolated, depressurising the isolatable region to a pressure below an ambient, subsea pressure or pressurising the isolatable region using a pressure manipulation device positioned subsea; monitoring a pressure of the isolatable region after being depressurised; and determining whether the valve to be tested is operating correctly based on the monitoring.

A method of estimating the primary and secondary acoustic velocities, Vp and Vs, of formation surrounding a first wellbore includes obtaining well logging data for a multiplicity of other wellbores to collect, for each other wellbore a plurality of input data sets including at least a Nuclear Magnetic Resonance logging data set, and an element composition scanning data set. The operation further collects, for each other wellbore, at least one output data set including a primary and secondary velocity data set. The method incudes training or establishing at least one regression model using said input and output data sets, obtaining well logging data for said first wellbore to obtain a corresponding plurality of input data sets, and applying the obtained corresponding plurality of input data sets to the trained or established regression model to generate as an output of the regression model, an output data set for the first wellbore including a primary and secondary velocity data set.

A capture system for offshore carbon dioxide capture and a method for offshore carbon dioxide capture are described. A capture system for offshore carbon dioxide capture, the system comprising: a pressurised flue gas source configured to provide a pressurised flue gas 101 ; a solvent source configured to provide a liquid solvent; and a two-phase atomising nozzle in fluid communication with the pressurised flue gas source and the solvent source; wherein the two-phase atomising nozzle is configured for two-phase flow of a mixture of the pressurised flue gas and the liquid solvent in order to generate an atomised solvent spray of the liquid solvent.

A method of identifying a location of gas breakthrough within a completed production well includes: obtaining production composition data and/or tracer data from the production well; analysing the production composition data and/or tracer data to determine whether gas breakthrough has occurred within the production well; and in response to determining that gas breakthrough has occurred within the production well, examining mud-gas data collected during drilling of the production well to identify a gas breakthrough location within the well where the gas breakthrough has occurred.

A wind turbine system including a rotationally asymmetric floating wind turbine installation and a rotationally asymmetric mooring system connected to the floating wind turbine installation. The mooring system includes a number of mooring lines connected, directly or indirectly, to the floating wind turbine installation such that the mooring system has a lower yaw stiffness when a wind acting on the wind turbine installation comes from 0° than when a wind acting on the wind turbine installation comes from ±90°. A wind coming from 0° is defined as a wind direction when the horizontal part of the aerodynamic rotor thrust force resulting from the wind is directed towards the center of gravity of the floating wind turbine installation.

A cable head ring for use in connecting a wind turbine tower to a concrete foundation. The cable head ring includes an annular plate for connecting to the upper end of the concrete foundation, an inner tubular web extending axially from the annular plate and an outer tubular web extending axially from the annular plate. An annular gap is formed between the inner and outer tubular webs for receiving a tubular wind turbine component. The annular plate has a plurality of passages extending axially therethrough for receiving tensioning tendons of the concrete foundation. The inner and outer tubular webs include holes extending radially therethrough. The positions of the holes in the inner tubular web correspond to the positions of the holes in the outer tubular web such that a fastener can extend radially through a hole in the inner tubular web and a hole in the outer tubular web.

A method of installing a header pipe joint 1 at a subsea structure 5 is provided, comprising providing a header pipe joint 1 having at least one valve 2 installed therein and connecting the header pipe joint 1 inline of a spool 15 or pipeline 18 prior to lowering the header pipe joint 1 to the subsea structure 5 . The header pipe joint 1 is then lowered to the subsea structure 5 , and the valve 2 is connected to the subsea structure (e.g. a subsea production system of the subsea structure such as a xmas tree) with a connection bridge e.g. a choke bridge 14 . This provides a fluidic connection between the subsea structure and the header pipe joint. The subsea structure 5 comprises a foundation, e.g. suction anchors 11 , which provide support for both a wellhead and the header pipe joint. A subsea assembly comprising a subsea structure 5 , header pipe joint 1 and connection bridge 14 is also provided.

An inflow control device for use in a well or pipeline, the inflow control device being configured to switch reversibly between an open state and a closed state, or between a closed state and an open state, the inflow control device including: a housing; a gate moveable within the housing between a closed state and an open state; the housing defining a first valve seat for receiving the gate in a closed state, and a second valve seat for receiving the gate in an open state, wherein the first valve seat and the second valve seat include one or more permanent magnets, or wherein the gate includes one or more permanent magnets.

A whipstock assembly including a whipstock with an inclined surface in an upper part of a housing for deflecting a drill string; an anchor, below the whipstock having run and set states, in the run state the anchor runs into the well and in the set state the anchor anchors against an inner wall of the well; a sealing device having run and set states, in the run state the sealing device runs into the well and in the set state the sealing device seals against the inner wall; an activation device for actuating the both the anchor and the sealing device from the run state to the set state and; a lock operable between: a first position in which the preventing activation of the activation device; and a second position allowing activation of the activation device thereby forcing both the anchor and the sealing device to the set state.

An electronic inflow control device for use in a hydrocarbon producing well, the inflow control device being configured to switch electronically between an open state and a closed state, the inflow control device including a housing, including one or more electromagnets, a gate including one or more permanent magnets and moveable within the housing between a closed state and an open state, in which the housing defining a first valve seat for receiving the gate in a closed state, and a second valve seat for receiving the gate in an open state, and the gate defines side openings which can be selectively aligned with side openings in an insert of the housing extending into the gate.