Valved tree member for a riser system and telescoping device for inclusion in a riser system
a technology of telescopic devices and vertical trees, applied in the direction of fluid removal, drilling accessories, borehole/well accessories, etc., can solve the problems of significant safety and operation
Inactive Publication Date: 2018-02-15
OIL STATES INDS UK
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Benefits of technology
This patent describes a device that can be used in a sea riser system for a ship. It has a valved tree with valves that control the flow of fluid and moveable parts that can be used to connect pipes. This allows the riser system to be run into the sea through the device. The technical effect is that it provides a more efficient and flexible way to manage the flow of fluids in a sea riser system.
Problems solved by technology
Conventionally, work on the upper end of the riser system such as connecting in or swapping out required top level equipment is normally carried out with the drill ship moving relative to the sea bed / riser system because of the sea swell and this causes significant safety and operational problems when installing / changing such top level equipment and therefore sea conditions have to be calm to proceed with any degree of safety.
Method used
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[0086]FIG. 1 shows a riser installation system 10 which is typically located on a sea going vessel 8 (not shown) such as a drill ship or floating production facility or other suitably arranged sea going vessel 8 (only partially shown in the Figures) where the vessel 8 comprises a drill floor 12 and a moon pool 14 located immediately below the drill floor 12, where the moon pool 14 comprises an opening in the bottom of the sea going vessel and through which a riser system 35 and other equipment to be installed on the sea bed in the general location below the sea going vessel 8 can be lowered through.
[0087]As can be seen in FIGS. 1A and 1n more detail in FIG. 1B, a christmas tree 20 has already been lowered from the sea going vessel 8 (or from another sea going vessel not shown)) through the moon pool 14 and into the water at the water line 16 and further lowered all the way to the sea bed surface or the mud line 18 which may be many thousands of feet and in FIG. 1 the distance betwee...
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A valved tree member (50) for inclusion in a riser completion system (35) and suitable for use in the region of a moon pool (14) on a floating vessel (8), the valved tree member (50) comprising:one or more valve members (70) adapted to selectively permit and prevent flow of fluid therethrough, andone or more moveable stab members (76) adapted to respectively selectively provide a sealed fluid communication path between a throughbore of the riser system and the one or more valve members (70). A telescoping device (60) and a flow diverter member (66) for inclusion in the riser completion system (35) are also provided, as well as a riser completion system (35) incorporating the valved tree member (50), the telescoping device (60) and the flow diverter member (66).
Description
BACKGROUND1. Field of the Invention[0001]The field of invention relates to offshore riser systems used in the oil and gas industry.2. Background of the Invention[0002]The present invention relates to an apparatus and method particularly but not exclusively for use in the moon pool area of an offshore vessel used to install and support a riser system used to produce hydrocarbons from a subsea well to a floating production facility or vessel on the sea surface and more particularly the invention relates to seeking to improve safety by allowing the possibility of halting and diverting the flow of hydrocarbon product to or below the drill floor and also providing the possibility of remote disconnection of the top level equipment on the drill floor from the riser system below and therefore allowing the possibility of work to be safely carried out on the top level equipment and / or the upper end of the riser system on the drill floor without the heave hazard associated with sea and vessel ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E21B33/076E21B34/00E21B19/00
CPCE21B33/076E21B19/006E21B34/00E21B21/106E21B43/01E21B41/0007E21B19/00E21B19/004E21B21/10
Inventor STEPHEN, GARRY ROBERT
Owner OIL STATES INDS UK