Subsea well safing system
First Claim
1. A subsea well safing package, comprising:
- an assembly connector interconnecting a lower assembly and an upper assembly, wherein the lower assembly is to be connected to a subsea well;
the lower assembly comprising lower slips to engage and secure a tubular suspended in a bore formed through the lower assembly and the upper assembly;
the upper assembly comprising upper slips operable to engage and secure the tubular; and
a shear positioned between the upper slips and the lower slips, the shear operable to shear the tubular.
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Accused Products
Abstract
A subsea well safing method and apparatus to secure a subsea well in the event of a perceived blowout in a manner to mitigate the environmental damage and the physical damage to the subsea wellhead equipment to promote the ability to reconnect and recover control of the well. The safing assembly is connectable to a subsea well and a marine riser. Pursuant to a safing sequence, the well tubular is secured in the upper and lower safing assemblies and the tubular is then sheared between the locations at which it has been secured. Subsequently, an ejection device may be actuated to physically separate the upper safing assembly and the connected marine riser from the lower safing assembly the subsea well.
10 Citations
20 Claims
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1. A subsea well safing package, comprising:
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an assembly connector interconnecting a lower assembly and an upper assembly, wherein the lower assembly is to be connected to a subsea well; the lower assembly comprising lower slips to engage and secure a tubular suspended in a bore formed through the lower assembly and the upper assembly; the upper assembly comprising upper slips operable to engage and secure the tubular; and a shear positioned between the upper slips and the lower slips, the shear operable to shear the tubular. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A subsea well system, comprising:
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a safing package comprising a lower assembly connected to a subsea well and an upper assembly connected to a marine riser; an assembly connector in a latched position interconnecting the lower assembly and the upper assembly and providing a bore through the safing package in communication with the marine riser and the subsea well, the assembly connector operable to an unlatched position thereby disconnecting the upper assembly from the lower assembly; the lower assembly comprising lower slips to engage and secure a tubular suspended in the bore; the upper assembly comprising upper slips operable to engage and secure the tubular; and a shear positioned between the upper slips and the lower slips operable to shear the tubular. - View Dependent Claims (12, 13, 14)
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15. A subsea well safing method, comprising:
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utilizing a safing package installed between a subsea well and a marine riser, the safing package comprising a lower assembly connected to the subsea well and upper assembly connected to the marine riser forming a bore between the riser and the subsea well, wherein the lower assembly comprises lower slips and the upper assembly comprises upper slips; securing a tubular suspended in the bore with the lower slips at a position in the lower assembly; securing the tubular with the upper slips at a position in the upper assembly; shearing the tubular in the bore between the position in the lower assembly and the position in the upper assembly at which the tubular has been secured; and after shearing the tubular, disconnecting the upper assembly from the lower assembly. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification