公开(公告)号：US4695199A

公开(公告)日：1987-09-22

申请号：US869524

申请日：1986-06-02

申请人： John H. Goodacre ,  Larry J. Hall

发明人： John H. Goodacre ,  Larry J. Hall

IPC分类号： E02B3/16 ,  E02B17/00 ,  E02D23/16 ,  E02D5/74

CPC分类号： E02B17/027 ,  E02B17/0021 ,  E02B3/16 ,  E02D23/16 ,  E02B2017/0039 ,  E02B2017/0043 ,  E02B2017/0052

摘要： The Removable Bottom Founded Structure (RBFS) is an offshore platform for petroleum drilling and producing operations intended for deployment in waters with severe weather and iceberg conditions. The structure is normally held down by gravity, but during the deballasting procedure a hold-down system is employed to keep the platform on the subbase until site evacuation. The system that is used to hold the platform down onto the subbase is located where the platform meets the subbase. It operates on the principle of hydrostatics. On the top surface of the subbase there are circularly arranged elastomeric bearing pads that define chambers which may be evacuated by pumping and which are vented to the outside atmosphere. Pressure by the platform on the bearing pads creates a fluid-tight seal so that no seawater will enter the evacuated chambers. The seawater evacuation causes a reduction of the buoyancy forces on the underside of the platform which will hold the platform onto the subbase until such time as the platform is totally deballasted. Once that has occurred, the hydrostatic hold-down system is disengaged and the platform will quickly rise to the surface.

摘要翻译： 可移动底部结构（RBFS）是用于石油钻探和生产作业的海上平台，旨在部署在恶劣天气和冰山条件的水域。 该结构通常被重力压住，但是在卸载过程中，采用压紧系统将平台保持在底座上，直到抽空。 用于将平台保持在子基础上的系统位于平台与底座相交的位置。 它以流体静力学原理运行。 在底座的顶表面上有圆形布置的弹性轴承垫，其限定可以通过泵送排出并且排放到外部气氛的室。 通过平台在轴承瓦片上的压力产生流体密封，使得海水不会进入抽真空室。 海水疏散导致平台下侧的浮力减小，这将使平台保持在底座上，直到平台被完全卸载为止。 一旦发生这种情况，静压压紧系统就会脱离，平台将快速上升到表面。

公开(公告)号：US4695200A

公开(公告)日：1987-09-22

申请号：US869525

申请日：1986-06-02

申请人： Larry Hall ,  John H. Goodacre

发明人： Larry Hall ,  John H. Goodacre

IPC分类号： E02B3/16 ,  E02B17/00 ,  E02D23/16 ,  E02D21/00

CPC分类号： E02B17/027 ,  E02B17/0021 ,  E02B3/16 ,  E02D23/16 ,  E02B2017/0043 ,  E02B2017/0052 ,  E02B2017/0069

摘要： The Removable Bottom Founded Structure (RBFS) is an offshore platform for petroleum drilling and producing operations which is deployed in waters with severe weather and iceberg conditions. The structure is normally held down by gravity, but during the deballasting procedure a hold-down system is employed to keep the platform on the subbase until site evacuation. The system that is used to hold the platform down onto the subbase is located where the platform meets the subbase. It operates on the principle of hydrostatics. On the underside of the columns, there are multiple chambers which may be evacuated by pumping and which are vented to the outside atmosphere. Flexible seals that define these chambers are positively engaged by water to create a fluid-tight seal so that no seawater will enter the evacuated chambers. The reduction of the buoyancy forces will hold the platform onto the subbase until such time as the platform is totally deballasted. Once that has occurred, the hydrostatic hold-down system is disengaged and the platform will quickly rise to the surface.

摘要翻译： 可移动底部结构（RBFS）是石油钻井和生产作业的海上平台，部署在恶劣天气和冰山条件的水域。 该结构通常被重力压住，但是在卸载过程中，采用压紧系统将平台保持在底座上，直到抽空。 用于将平台保持在子基础上的系统位于平台与底座相交的位置。 它以流体静力学原理运行。 在柱的下侧，有多个室可以通过泵送排出并排放到外部大气。 限定这些室的柔性密封件由水积极地接合以产生流体密封，使得没有海水进入抽真空室。 浮力的减少将使平台保持在底座上，直到平台完全脱落为止。 一旦发生这种情况，静压压紧系统就会脱离，平台将快速上升到表面。

公开(公告)号：US4695201A

公开(公告)日：1987-09-22

申请号：US898989

申请日：1986-08-21

申请人： Robert H. Beskow ,  Patrick J. Dunn ,  John H. Goodacre ,  Larry J. Hall ,  William H. Fischer ,  E. Ronald Carlson

发明人： Robert H. Beskow ,  Patrick J. Dunn ,  John H. Goodacre ,  Larry J. Hall ,  William H. Fischer ,  E. Ronald Carlson

IPC分类号： E02B17/00 ,  E21B43/017

CPC分类号： E02B17/00 ,  E21B43/017 ,  E02B2017/0052

摘要： The Removable Bottom Founded Structure (RBFS) is an offshore platform for petroleum drilling and producing operations intended for deployment in waters with severe weather and iceberg conditions. It is a two-part structure comprising (1) a platform which is made up of a deck structure, multiple columns and braces; and (2) a reinforced concrete subbase that rests on the sea floor and upon which the platform is founded. The structure is normally held down by gravity for standard platform operations, but during the deballasting procedure due to an iceberg emergency a hold-down system is employed to keep the platform on the subbase until full deballasting is achieved. The system that is used to hold the platform down onto the subbase is located where the platform meets the subbase. It operates on the principle of hydrostatics. On the underside of the columns there are multiple chambers which may be evacuated by pumping and which are vented to the outside atmosphere. Flexible seals that define these chambers are positively inflated by water to create a fluid-tight seal so that no seawater will enter the evacuated chambers. The reduction of the buoyancy forces will hold the platform onto the subbase until such time as the platform is totally deballasted. Once that has occurred, the hydrostatic hold-down system is disengaged and the platform will quickly rise to the surface to assume its floating draft and avoid the iceberg danger.

摘要翻译： 可移动底部结构（RBFS）是用于石油钻探和生产作业的海上平台，旨在部署在恶劣天气和冰山条件的水域。 它是一个两部分结构，包括（1）由甲板结构，多列和支架组成的平台; 和（2）位于海底上的钢筋混凝土底座，平台建在该底座上。 该结构通常由重力作用于标准平台操作，但是由于冰山紧急情况，在卸载过程中，采用压紧系统将平台保持在底座上，直到达到完全的卸料。 用于将平台保持在子基础上的系统位于平台与底座相交的位置。 它以流体静力学原理运行。 在柱的下侧有多个室，可以通过泵送排空，并且排放到外部大气。 限定这些腔室的柔性密封件被水积极地充气以产生流体密封，使得没有海水进入抽真空室。 浮力的减少将使平台保持在底座上，直到平台完全脱落为止。 一旦发生这种情况，静水压力系统就会脱开，并且平台将迅速上升到地面以承担其浮动吃水并避免冰山危险。

公开(公告)号：US4695198A

公开(公告)日：1987-09-22

申请号：US866825

申请日：1986-05-23

申请人： John H. Goodacre ,  Eric Brogren

发明人： John H. Goodacre ,  Eric Brogren

IPC分类号： E02B3/16 ,  E02B17/00 ,  E02D23/16 ,  E02D27/52 ,  E02B17/02

CPC分类号： E02B3/16 ,  E02B17/00 ,  E02D23/16 ,  E02D27/52 ,  E02B2017/0052

摘要： The Removable Bottom Founded Structure (RBFS) is an offshore platform for petroleum drilling and producing operations intended for depolyment in waters with severe weather and iceberg conditions. The structure is normally held down by gravity, but during the deballasting procedure a hold-down system is employed to keep the platform on the subbase until site evacuation. The system that is used to hold the platform down onto the subbase is located where the platform meets the subbase. It operates on the principle of hydrostatics. On the underside of the columns there are multiple chambers which may be evacuated by pumping and which are vented to the outside atmosphere. Flexible seals that define these chambers are positively engaged by this evacuation to create a fluid-tight seal so that no seawater will enter the evacuated chambers. The reduction of the buoyancy forces will hold the platform onto the subbase until such time as the platform is totally deballasted. Once that has occurred, the hydrostatic hold-down system is disengaged and the platform will quickly rise to the surface.

摘要翻译： 可移动底部结构（RBFS）是用于石油钻井和生产操作的海上平台，用于在恶劣天气和冰山条件下的水域中分解。 该结构通常被重力压住，但是在卸载过程中，采用压紧系统将平台保持在底座上，直到抽空。 用于将平台保持在子基础上的系统位于平台与底座相交的位置。 它以流体静力学原理运行。 在柱的下侧有多个室，可以通过泵送排空，并且排放到外部大气。 限定这些腔室的柔性密封件通过这种抽空而正向接合，以产生流体密封，使得海水不会进入抽真空室。 浮力的减少将使平台保持在底座上，直到平台完全脱落为止。 一旦发生这种情况，静压压紧系统就会脱离，平台将快速上升到表面。