Bore selection apparatus
AssigneeEnovate Systems Limited
InventorJeffrey Edwards
Life of this patent
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Abstract
A bore selection device for use with a dual bore subsea system is disclosed. The bore selector (18) can be remotely actuated to provide selection between a production bore (12) and an annulus bore (16) without a rotating mechanism or flapper valve. Embodiments of the invention are disclosed. In one embodiment a pair of rams (20) having a ram head (20a, 20b) defining parts of a guide funnel (30a, 30b) are hydraulically actuatable so that when the rams are actuated and closed the guide funnel (30) is formed which couples a part of the production bore (126) to the annulus bore (16a).
Claims13
A bore selection device for use with a dual bore sub-sea system, said bore selection device comprising:
- a housing having a longitudinal axis, said housing defining a production bore and an annulus bore, said production bore being of a diameter larger than said annulus bore and extending the length of the housing, said annulus bore extending part-way along the length of said housing;
- bore selector means movable between a first position wherein the production bore is open and said annulus bore is closed and a second position wherein the production bore is closed and said annulus bore is open;
- the bore selector means being coupled to actuation means by coupling means said actuation means an coupling means being disposed in said housing, said actuation means being movable substantially parallel to said production bore, said coupling means coupling said actuation means to said bore selector means to transform longitudinal movement of said actuation needs to transverse movement of said bore selector means to said production bore whereby said bore selector means is moved between said first and said second positions.
A method of selecting a bore within a dual bore sub-sea device having a production bore and a separate annulus bore, said method comprising the steps of:
- actuating a first actuation means to move in a first direction substantial parallel to the production bore of the dual sub-sea device;
- coupling the longitudinal movement of the actuation means to at least one ram via linkage means for converting the longitudinal movement to substantially transverse movement of said ram, said transverse movement of said ram moving between a first position wherein the production bore is open and a second position wherein the production bore is dosed.
Dependencies are inferred from the claim text.