Abstract: The invention is directed to a method for heating a process gas in a top or bottom fired reformer, a method for improving the temperature spread over a top or bottom fired reformer, and to a top or bottom fired reformer wherein these methods can applied. This can be achieved by the lane flow rate of at least one outer tube lane being different from the lane flow rate of at least one inner tube lane.

Abstract: A cracking furnace comprises a pyrolysis tube 1 for carrying a flow of fluid, the pyrolysis tube comprising a radially inner body 3 and a radially outer wall 2 which together define an annular flow passage 5, wherein at least one of the radially inner body and the radially outer wall has a centre line which extends helically in a longitudinal direction of the pyrolysis tube, so as to promote rotation of the fluid as it flows along the pyrolysis tube.

Abstract: The device comprises: a shell defining an interior volume to receive the first fluid extending along a longitudinal axis; a tube bundle arranged inside the shell, the tube bundle extending longitudinally in the interior volume to receive the second fluid; a disengagement member, able to perform liquid vapor separation in the fluid carried from the interior volume, the disengagement member being arranged above the tube bundle. In at least one plane perpendicular to the longitudinal axis, the disengagement member includes at least two separate fluid passage regions and at least one intermediate region preventing fluid from passing.

Abstract: The process comprises the following steps: mixing a gaseous stream of flash gas and a gaseous stream of boil-off gas to form a mixed gaseous flow; compressing the mixed gaseous flow in at least one compression apparatus to form a flow of compressed combustible gas; withdrawing a bypass flow in the flow of compressed combustible gas; compressing the bypass flow in at least one downstream compressor; cooling and expanding the compressed bypass flow; reheating at least a first stream derived from the expanded bypass flow in at least one downstream heat exchanger, reintroducing the first reheated stream in the mixed gaseous flow upstream from the compression apparatus.

Abstract: Methods and systems are for transferring fluid cargo between a first vessel and a second vessel at open sea in a Parallel configuration. The first vessel is equipped with a cargo connection point and the second vessel is equipped with cargo manifold. A tubular line is connectable between the cargo connection point and the cargo manifold. The method can include attaching a self-propelled buoy to the second vessel; connecting a cargo connection between the self-propelled buoy and the cargo manifold; connecting a cargo line between the cargo connection point and the self-propelled buoy; transferring cargo between the cargo connection point and the cargo vessel; and relying on the self-propelled buoy to keep the self-propelled buoy within predetermined distance boundaries from the first vessel also when the self-propelled buoy is attached to the second vessel.

Abstract: A waste heat boiler system for cooling a process gas, including a first shell-and-tube heat exchanger for cooling relatively hot gas down to relatively warm gas, an intermediate chamber for receiving gas, cooled down to relatively warm gas, coming out of tubes of the first heat exchanger, and a second shell-and-tube heat exchanger for cooling relatively warm gas further down to relatively cool gas. The intermediate chamber is provided with an outlet fluidly connected to a bypass channel for allowing a part of the relatively warm gas to bypass tubes of the second heat exchanger. The bypass channel and tubes of the second heat exchanger are both fluidly connected with a mixing chamber for mixing together relatively warm gas flowed from the intermediate chamber into the mixing chamber via the bypass channel and relatively cool gas come out of the tubes of the second heat exchanger.

Abstract: The present invention relates to a method for treating a cracked stream stemming from a fluid catalytic cracker unit (FCCU) in order to improve propylene recovery. The present invention also relates to the corresponding installation to implement the method.

Abstract: The method according to the invention comprises the separation of a feed stream (16) into a first fraction (60) and a second fraction (62) and the injection of at least part of the second fraction (62) into a second dynamic expansion turbine (46) to form a second expanded fraction (80). It comprises the cooling of the second expanded fraction (80) through heat exchange with at least part of the first headstream (84) coming from a first column (28) and the formation of a second feed stream (82) of the first column (28) from the second cooled expanded fraction.

Abstract: Burner for a furnace comprising at least one supply channel for supplying an oxidizing medium and a plurality of peripheral fuel supply channels, wherein the channels have exit openings arranged adjacent each other at a burner end surface for forming during use upon reaction of supplied fuel with supplied oxidizing medium a flame front, wherein the exit openings are asymmetrically arranged with respect to any plane arranged transverse to the end surface of the burner and extending through a burner central axis whereby the distribution of the fuel exit openings and/or the dimension of the fuel exit openings and/or the exit angle of the fuel exit openings and/or the shape of the fuel exit openings are arranged asymmetrically to said any plane, such that during use a flame front is created that is asymmetrical with respect to said any plane.

Abstract: A guide wheel (26) for fitting a layer of carbon armor wires around a tubular core (24). The guide wheel (26) has a central cavity (32), an internal circular edge (34), and a peripheral circular edge (38) that extends coaxially at a distance from said internal circular edge (34), the guide wheel (26) includes a plurality of guiding devices (46), each of which is capable of guiding in translation a plurality of carbon armor wires, the guiding devices being mounted around said central cavity (32). The guiding device (46) includes a peripheral redirecting member (50) in order to be able to guide the carbon armor wires to the internal circular edge (34), and a central redirecting member (52) in order to be able to guide said carbon armor wires through a second curved passageway.

Abstract: The present disclosure provides a lateral external sleeve for a riser that can be preinstalled or field installed around the riser as it is deployed onto the seabed and a stress joint installed with the riser and longitudinally partially within the lateral external sleeve. The external sleeve in conjunction with the stress joint can support a laterally deployed riser in an otherwise high stress zone of the riser as it would bend due to changes in elevations and thus reduce stress on the riser. The system can act independently of a buoy-based system typically used in the art.

Abstract: The assembly includes a one group (40A to 40C) of hydraulic shock absorbers (42), each shock absorber (42) comprising a hydraulic jack comprising a cylinder designed to be supported by the first element (14), and a shock-absorbing member partially received in the cylinder. The shock-absorbing member has a head protruding outside the cylinder, the head being designed to come into contact with the second element during mounting of the second element on the first element (14). The shock-absorbing assembly (17) includes, for each group (40A to 40C) of shock absorbers (42), a fluid accumulator (44) connected to each cylinder of the group of shock absorbers (42), to allow a hydraulic fluid transfer between the different cylinders of the group of shock absorbers (42) during contact between each head and the second element.

Abstract: An umbilical for use in the offshore production of hydrocarbons, and in particular to a power umbilical for use in deep water applications is described, comprising a plurality of longitudinal strength members, wherein at least one longitudinal strength member comprises rope enclosed within a tube. In this way, the or each longitudinal strength member being a rope and tube combination achieves the synergistic benefit of favorable mechanical properties in the axial direction, with favorable mechanical properties in the radial direction during tensioning or the like of the umbilical, especially during installation.

Abstract: The disclosure provides an in-situ system and method for transferring a load from a tensioned flexible link between at least two bodies, such as between a buoyancy can and a subsea riser or between a moored offshore platform and a pile. The system and method provides a tether assembly having a hydraulic cylinder and/or a transfer assembly, where the hydraulic cylinder is configured upon actuation to decrease a distance between the two bodies; and the transfer assembly includes a mechanical interlock configured upon actuation to maintain the decreased distance between the two bodies independent of the hydraulic cylinder. The mechanical interlock can include various embodiments that can be selectively activated and deactivated position to allow the hydraulic cylinder to operate at various times in the transfer process. A support assembly can provide additional support to the flexible link independent of or in addition to the transfer assembly.

Abstract: An assembly for connecting a flexible line (20) to an underwater installation (18). The line is extended between the underwater installation (18) and a surface installation (16). The line (20) includes (i) a surface end (22), a bottom end (28) (ii) a contact portion (26) near the bottom end and a floating portion (24) which extends between the contact portion (26) and the surface end (22). The contact portion (26) includes an angled part (40) that divides the contact portion (26) into a first part (36) and a second part. Then angled part (40) is moored to the bottom (10) at an anchoring point (42) located in the opposite direction from both the bottom end (28) and the floating portion (24).

Abstract: The disclosure reduces vertical movement of a floating offshore platform by including a centralized open keel plate coupled to the hull that allows water below and above the keel plate. As the floating platform moves vertically, the keel plate separates the water and causes drag on the platform. The water moving vertically with the plate also increases the dynamic mass. The drag results in less vertical movement of the offshore platform without the need to extend legs of the platform to gain an equivalent reduction in vertical movement. The added dynamic mass increases the natural period of the vertical motion away from the wave excitation period to minimize the wave driven motion. The keel plate generally is above or at the same level of the keel, and therefore would not reduce the clearance between the seabed and the keel of the hull at the quayside.

Abstract: A device including a fluid transport pipe (24), a superstructure (16), and a floating barge (18) rotatably mounted on the superstructure (16) about an axis of rotation (A-A?). The pipe (24) includes a hose section (150) wound around the axis of rotation (A-A?) supported by an intermediate structure (20) mounted between the superstructure (16) and the barge (18), between a configuration rotatably driven with the barge (18) about the axis of rotation and a configuration rotatably retained about the axis of rotation (A-A?) by the superstructure (16). During a step of connecting the pipe (24), the intermediate structure (20) is placed in either the driven configuration or the retained configuration, a step of disconnecting the pipe (24) including switching the intermediate structure (20) to the other one of the driven configuration and the retained configuration.

Abstract: An underwater fluid transport apparatus (10) to transport a fluid between a sea bed (12) and the surface (14) of the sea vertically above the sea bed. A riser (20) is connected to a flexible pipe (32) leading to the sea surface (14). A retaining float (24) is installed around the riser in order to maintain the riser (20) in a stretched suspended position between the sea bed (12) and a subsurface region situated between the sea bed and the surface (14) of the sea. The flexible pipe (32) extends in a catenary curve between the riser (20) and the sea surface. An additional float (28) is installed between the riser (20) and the sea surface (14). The riser (20) is attached to the additional float (28) to increase the buoyancy of the riser.

Abstract: A method of manufacturing a mechanically lined pipe (MLP) having an outer pipe and an inner liner comprising at least the steps of: (a) forming the outer pipe as a single length; (b) forming an inner liner former being wholly or substantially the same length as the outer pipe of step (a); (c) locating the inner liner former of step (b) within the outer pipe; and (d) expanding the inner liner former within the outer pipe to form the MLP.

Abstract: The disclosure relates to an assembly including a supporting buoy and an anchoring assembly (28) comprising a base (100) attached to the bed (12) of the expanse of water. The assembly comprises a flexible anchoring line (30) connecting the anchoring assembly (28) to the supporting buoy (26). The anchoring line (30) comprises a lower section (84) made of chain links (92). The anchoring assembly (28) comprises a device (110) for guiding the lower section (84). The lower section (84) is movably mounted in the guide device (110) relative to the base (100), between an extended configuration and a contracted configuration, and a locking member (114) which can be released from the anchor line (30) on the anchoring assembly (28).