The invention provides a subsea oil and gas production installation, methods of installing the installation and methods of use. The installation comprises a subsea production system comprising a first production pipeline and a second production pipeline, a first subsea manifold in fluid communication with the first production pipeline comprising a fluid access interface and a flowline connector, a removable module fluidly connected to the fluid access interface of the first subsea manifold and configured to receive production fluid from one or more subsea wells and a second subsea manifold in fluid communication with the second production pipeline. The first subsea manifold defines a first flow path between the fluid access interface and the first production pipeline and a second bypass flow path between the fluid access interface and the flowline connector. The first and the second subsea manifolds are fluidly coupled to one another by a connecting flowline which is connected at a first end to the flowline connector of the first subsea manifold. The removable module comprises a flow control means operable to selectively route the production fluid from one or more subsea wells into the first production pipeline via the first flow path defined by the manifold, and/or into the second production pipeline via the second bypass flow path, the connecting flowline and the second subsea manifold.

Blowout preventer (BOP) systems and methods for providing additional redundancy and reliability are provided. A BOP system for providing additional redundancy can include a first set of components including a BOP control pod with a primary regulator and a secondary regulator, where the primary regulator and the secondary regulator are arranged in a parallel configuration; a hydraulic supply line in communication with the BOP control pod; a pod select valve in communication with the primary regulator and the secondary regulator; and a bypassable hydraulic regulator in communication with the pod select valve; and a second set of components, the bypassable hydraulic regulator disposed between the pod select valve and the second set of components, where a hydraulic regulator bypass line bypasses the bypassable hydraulic regulator between the pod select valve and the second set of components.

A connector is configured to couple a first annular member to a second annular member. The connector includes a rotatable plate and multiple lock segments. The connector further includes a coupling assembly that is configured to couple the rotatable plate to the multiple lock segments, such that rotation of the rotatable plate in a circumferential direction drives the plurality of lock segments along a radial axis to adjust the connector between an unlocked configuration and a locked configuration.

A subsea connector assembly with flowmeter incorporated therein. The assembly is particularly configured for securing a flexible flowline at subsea production managing hardware such as at a manifold at a seabed or Christmas tree at a well head. Incorporating a flowmeter into the connector as opposed to such comparatively larger scale hardware ultimately saves substantial material, transport, installation, footspace and other costs.

A subsea arrangement including a base structure; a tubular member rotatably mounted to the base structure through an annular bearing, wherein a section of the envelop surface of the tubular member is covered by a layer of thermally insulating material; a ring-shaped insulating member of open cell polymer foam mounted to the tubular member, wherein an inner edge of the insulating member is in contact with the envelop surface of the tubular member and the insulating member protrudes radially from the tubular member. The insulating member is positioned between an inner edge of the layer and the annular bearing with a first lateral surface of the insulating member in sliding contact with the inner edge of the layer and with an opposite second lateral surface of the insulating member in contact with a part of the annular bearing.

A subsea arrangement including a base structure; a tubular member rotatably mounted to the base structure through an annular bearing, wherein a section of the envelop surface of the tubular member is covered by a layer of thermally insulating material; a ring-shaped insulating member of open cell polymer foam mounted to the tubular member, wherein an inner edge of the insulating member is in contact with the envelop surface of the tubular member and the insulating member protrudes radially from the tubular member. The insulating member is positioned between an inner edge of the layer and the annular bearing with a first lateral surface of the insulating member in sliding contact with the inner edge of the layer and with an opposite second lateral surface of the insulating member in contact with a part of the annular bearing.

A system includes a foundation with a post mounted on the foundation top surface and a pipe module configured to couple to the foundation. The pipe module has a yoke to cooperate with the post to engage the pipe module with the foundation. The pipe module is connected to the end of a pipeline and is configured to slide along the foundation responsive to longitudinal and angular movements of the end of the pipeline. A method includes deploying a foundation subsea and securing the foundation to a seafloor. The foundation has a post. The method includes deploying the pipe module via the pipeline suspended by a pipe module installation machine. The pipe module has a yoke. The method includes engaging the yoke with the post, paying out the pipeline to lower the yoke, and lowering and engaging the pipe module with the foundation.

Extender jumper systems and methods including an extender jumper system having an extender jumper assembly with a flowline and first and second connectors positioned at first and second ends of the flowline, and a support assembly configured to couple the extender jumper assembly to a support structure within a subsea field and to support the second connector to facilitate attachment between the second connector and a corresponding connector of another extender jumper or a jumper.

Extender jumper systems and methods including an extender jumper system having an extender jumper assembly with a flowline and first and second connectors positioned at first and second ends of the flowline, and a support assembly configured to couple the extender jumper assembly to a support structure within a subsea field and to support the second connector to facilitate attachment between the second connector and a corresponding connector of another extender jumper or a jumper.

A system is provided to perform various wellbore operations, including retrieval and replacement of solid internal tree caps, for example. The system may include an open water lubricator having a piston assembly disposed therein. The system may also include a well control package connected to a distal end of the open water lubricator. The piston assembly is configured to extend through the well control package. Method using systems disclosed herein may be performed while maintaining at least two testable pressure barriers during each of the retrieving and replacement steps.