A high-integrity pressure protection system Christmas tree is provided. In one embodiment, an apparatus includes a Christmas tree, a choke coupled to receive fluid from the Christmas tree, and a high-integrity pressure protection system. The high-integrity pressure protection system includes pressure sensors downstream of the choke, valves upstream of the choke, and a logic solver connected to control operation of the valves of the high-integrity pressure protection system that are upstream of the choke. Further, the valves of the high-integrity pressure protection system that are upstream of the choke include at least two valves of the Christmas tree. Additional systems, devices, and methods are also disclosed.

A high-integrity pressure protection system Christmas tree is provided. In one embodiment, an apparatus includes a Christmas tree, a choke coupled to receive fluid from the Christmas tree, and a high-integrity pressure protection system. The high-integrity pressure protection system includes pressure sensors downstream of the choke, valves upstream of the choke, and a logic solver connected to control operation of the valves of the high-integrity pressure protection system that are upstream of the choke. Further, the valves of the high-integrity pressure protection system that are upstream of the choke include at least two valves of the Christmas tree. Additional systems, devices, and methods are also disclosed.

A subsea support system comprises: at least one component (501) which is configured to be fixedly connected to a pressure conductor (101) in a seabed; and a subsea support (601) which is configured to compliantly support the at least one component (501); wherein, when the at least one component (501) is fixedly connected to the pressure conductor (101), substantially all of a mechanical load (T) which is applied to the subsea support (601) is transmitted by the subsea support (601) to the seabed while the at least one component (501) is substantially free of the mechanical load and remains fixed relative to the pressure conductor (101).

A subsea blind stab (100), comprises a stabbing part (110) for insertion into a hot stab receptacle, the stabbing part (110) including a housing, a central rod (150) slidably arranged within the housing and at least one fluid communication line from the external side of the stabbing part (110) to an internal fluid communication line (180) within the rod (150). The at least one fluid communication line is open in a first position of the rod (150) relative the housing and closed in a second position of the rod (150) relative the housing. The stab (100) further comprises a hollow body (120) attached to one end of the stabbing part (110); a piston (130) slidably arranged in the hollow body (120), with a spring element (160) arranged between the piston (130) and a spring attachment element (170) connected to the body. A first side of the piston (130) forms a fluid chamber (140) in the hollow body. The fluid chamber (140) is in fluid communication with the internal fluid communication line in the rod, and a second side of the piston (130) is exposed to a pressure of the surrounding environment.

Subsea acoustic insulation is used to mitigate noise associated with any one or a combination of a deep-water production tree, a deep-water manifold or structure, subsea pumping equipment, or subsea compression equipment. A subsea oil and gas facility includes subsea equipment having one or more devices that generate noise during operation, and subsea acoustic insulation surrounds at least a portion of the subsea equipment and is configured to attenuate the generated noise.

Subsea acoustic insulation is used to mitigate noise associated with any one or a combination of a deep-water production tree, a deep-water manifold or structure, subsea pumping equipment, or subsea compression equipment. A subsea oil and gas facility includes subsea equipment having one or more devices that generate noise during operation, and subsea acoustic insulation surrounds at least a portion of the subsea equipment and is configured to attenuate the generated noise.

A subsea equipment-protection apparatus including: a cap (1) and a sleeve (2), wherein the cap and the sleeve are configured to be supportable by a foundation (6) of the subsea equipment (16). The cap and the sleeve are arranged such that at least a portion of the cap may enter an opening of the sleeve and be supported by the sleeve; and thereby the cap and sleeve cover and protect the subsea equipment.

A subsea equipment-protection apparatus including: a cap (1) and a sleeve (2), wherein the cap and the sleeve are configured to be supportable by a foundation (6) of the subsea equipment (16). The cap and the sleeve are arranged such that at least a portion of the cap may enter an opening of the sleeve and be supported by the sleeve; and thereby the cap and sleeve cover and protect the subsea equipment.

An oil well improvement system having an intrusion detection and response subsystem that provides practical capability to defend offshore drilling platform from surface or subsurface terrorist threats/attacks utilizing modified low-cost off-the-shelf equipment and processor programs. The subsystem processes acoustical and/or RF sensor data to determine contact positions, rates, projected future positions, identification, threat analysis and recommends appropriate soft/hard kill counter measures and further provides control of those countermeasures.

An oil well improvement system having an intrusion detection and response subsystem that provides practical capability to defend offshore drilling platform from surface or subsurface terrorist threats/attacks utilizing modified low-cost off-the-shelf equipment and processor programs. The subsystem processes acoustical and/or RF sensor data to determine contact positions, rates, projected future positions, identification, threat analysis and recommends appropriate soft/hard kill counter measures and further provides control of those countermeasures.