Equipment for connection of subsea pipelines for oil and gas fields includes one machined block manifold having at least one fluid import spindle of side input, one stop valves set provided on a surface of machined block manifold, which also receives a header and branches, a point for line support and device for subsea installation, subsea line or pipeline. This set is installed on a foundation frame in sea soil and will be part of an oil drilling system.

A subsea pump and power system having a base unit positioned on the seabed to which is detachably mounted a power module tethered to a surface power source via a power umbilical. The base unit includes process pumps for carrying out subsea pumping operations and is lowered by a heavy lift cable into position on the seabed adjacent a hydrocarbon production facility prior to lowering of the power module on a tether. The power module includes a power unit which may include an electrical motor, or a hydraulic pump or both, one or more of which are driven by the umbilical extending from the surface. The tether supports the weight of the power module as it is lowered to the base unit and includes an electrical umbilical, a hydraulic umbilical or both.

A dual header oil and gas industry hydrocarbon production manifold. A plurality of three-way directional valves separate fluid flow between a well side of manifold and a pipeline side of the manifold. Two headers include header bodies and header flow paths and a pipeline side couplings. Each of two elbow pipes, provide a flow path between one of the headers, and a port on one of the plurality of three-way valves. At least one T-pipe, provides a flow path between one of the headers, and a port on two of the plurality of three-way valves. A manifold body or any of its main parts may be hipped. A layout with such a manifold is also disclosed.

A method transports and installs a heavy subsea structure such as a subsea processing center for produced crude oil or natural gas. The method includes controlledly flooding at least one ballast tank attached to or incorporated into the structure to the extent that the structure becomes negatively buoyant at a pre-determined towing depth. The method also includes towing the negatively-buoyant structure at the towing depth by the Controlled Depth Towing Method (CDTM). After towing to the installation location, the method includes further flooding the ballast tank to lower the structure onto the seabed. At the seabed, a fluid transportation pipe of a subsea production installation may be coupled to pipework of the structure.

A method transports and installs a heavy subsea structure such as a subsea processing center for produced crude oil or natural gas. The method includes controlledly flooding at least one ballast tank attached to or incorporated into the structure to the extent that the structure becomes negatively buoyant at a pre-determined towing depth. The method also includes towing the negatively-buoyant structure at the towing depth by the Controlled Depth Towing Method (CDTM). After towing to the installation location, the method includes further flooding the ballast tank to lower the structure onto the seabed. At the seabed, a fluid transportation pipe of a subsea production installation may be coupled to pipework of the structure.

The present invention relates to a system for producing hydrocarbons from remote subsea wells to a host production facility using a portable floating utility platform and tie-back system. The subject system comprises a floating utility platform positioned near a plurality of subsea wells; a plurality of control umbilicals connecting said platform to a well control system positioned near the wells and a pump and separation control system wherein the produced hydrocarbons flow from the well control system through a HIPPS to the pump and separation control system; and a host production platform equipped to receive the produced hydrocarbons from a reduced pressure export flowline that transports the hydrocarbons the entire tie-back length from the pump and separation control system to the host production platform. Optionally, the system can provide seawater injection capabilities as well as a single-track pigging.

The present invention relates to a system for producing hydrocarbons from remote subsea wells to a host production facility using a portable floating utility platform and tie-back system. The subject system comprises a floating utility platform positioned near a plurality of subsea wells; a plurality of control umbilicals connecting said platform to a well control system positioned near the wells and a pump and separation control system wherein the produced hydrocarbons flow from the well control system through a HIPPS to the pump and separation control system; and a host production platform equipped to receive the produced hydrocarbons from a reduced pressure export flowline that transports the hydrocarbons the entire tie-back length from the pump and separation control system to the host production platform. Optionally, the system can provide seawater injection capabilities as well as a single-track pigging.

A system includes a manifold and a shared valve actuation system that is operatively coupled to the manifold at a single location. The manifold is comprised of a block with at least one drilled header hole formed within the block, a plurality of drilled flow inlet holes formed within the block, wherein the number of drilled flow inlet holes corresponds to the number of external flow lines that supply fluid to the manifold, and a plurality of isolation valves coupled to the block, the valve element for each of the isolation valves positioned within the block. The system includes an arm that rotates about an axis that is normal to an upper surface of the block of the manifold, a plurality of structural elements that are coupled to one another via rotary joints, and a tool that engages and actuates one of the plurality of isolation valves.

A system includes a manifold and a shared valve actuation system that is operatively coupled to the manifold at a single location. The manifold is comprised of a block with at least one drilled header hole formed within the block, a plurality of drilled flow inlet holes formed within the block, wherein the number of drilled flow inlet holes corresponds to the number of external flow lines that supply fluid to the manifold, and a plurality of isolation valves coupled to the block, the valve element for each of the isolation valves positioned within the block. The system includes an arm that rotates about an axis that is normal to an upper surface of the block of the manifold, a plurality of structural elements that are coupled to one another via rotary joints, and a tool that engages and actuates one of the plurality of isolation valves.

A tethering system includes an adapter configured to couple to an upper end of a subsea anchor, a tensioning system, and a flexible tension member having one end coupled to the tensioning system and the other end coupled to the adapter. The tensioning system is operable to pay in and pay out the flexible tension member relative to the tensioning system. The tensioning system can be mounted to the BOP frame, and tension can be applied via a locally or remotely placed winch assembly. Tension can also be applied by gripping the flexible tension member and pulling on the flexible tension member with a hydraulic cylinder.