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    • 50. 发明申请
    • MONOBORE RISER BORE SELECTOR
    • MONOBORE RISER选择器
    • WO1997037101A1
    • 1997-10-09
    • PCT/GB1997000862
    • 1997-03-27
    • EXPRO NORTH SEA LIMITEDEDWARDS, Jeffrey, CharlesMORGAN, Michael, Graham
    • EXPRO NORTH SEA LIMITED
    • E21B23/12
    • E21B33/035E21B23/002
    • A bore selection apparatus (38) is described for facilitating access from a single bore riser to a production bore (34, 34a) or annulus bore (36, 36a) without using a wireline-run whipstock. The bore selector apparatus disposed within the bore of a BOP stack (12) and which can be coupled between casing or tubing and a sub-sea test tree. The bore selector apparatus (38) can be actuated from the surface or from an ROV to provide a coupling between the tubing bore (44) and the production bore (34, 34a) or between the tubing bore (44) and the smaller annulus bore (36, 36a). In a preferred embodiment this is achieved by using a rotatable ball valve element (46) located in a housing (42) disposed between the casing/tubing and a sub-sea test tree (39), the ball valve element (46) being apertured and being rotatable between a first position whereby the aperture (48) connects the production tubing to the production tubing bore (34, 34a) and in a second position is rotated whereby the aperture (48) connects the annulus bore (36, 36a) to the tubing or casing bore. When one of the production or annulus bores is connected to the tubing bore, then the other bore is isolated or disconnected. Alternative embodiments of the invention are described.
    • 描述了一种孔选择装置(38),用于在不使用有线运行的造斜器的情况下便于从单孔提升管进入生产孔(34,34)或环形孔(36,36a)。 钻孔选择器设备设置在BOP堆叠(12)的孔内并且可以联接在壳体或管道和海底测试树之间。 孔选择器装置(38)可以从表面或从ROV致动,以在管孔(44)和生产孔(34,34a)之间或在管孔(44)和较小环形孔 (36,36a)。 在一个优选实施例中,这是通过使用位于设置在壳体/管和海底试验树(39)之间的壳体(42)中的可旋转球阀元件(46)来实现的,球阀元件(46) 并且可在第一位置之间旋转,由此孔(48)将生产管道连接到生产管道孔(34,34a),并且在第二位置旋转,由此孔(48)将环形孔(36,36a)连接到 油管或套管孔。 当其中一个生产或环形孔连接到管孔时,另一个孔被隔离或断开。 对本发明的替代实施例进行描述。