CROSS-REFERENCE TO RELATED APPLICATIONS

The present disclosure claims priority to Chinese patent application with the filing NO. CN201810554221.1, filed with the Chinese Patent Office on May 30, 2018 and entitled “Offshore Platform Embarkation Facility and Offshore Platform”, the contents of which are incorporated herein in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of offshore platforms, in particular, to an offshore platform embarkation facility and an offshore platform.

BACKGROUND ART

Offshore platforms (jack-up platforms) are structures providing production and living facilities for activities such as well drilling, oil exploitation, concentrated transportation, observation, navigation and construction. Offshore platforms may be divided into a fixed type and a movable type according to their structural characteristics and operation states. A lower portion of a fixed type platform is directly supported and fixed to the seabed by means of piles, spread footings or other structures. A movable platform floats in water or is supported on the seabed, and can move from one well site to another well site.

However, in case of loading and unloading of personnel or goods, the existing offshore platforms are very inconvenient, and it is usually required to retract fixation piles embedded in the sea and serving a supporting function to bring an entire offshore platform down to the sea surface, such that ships can be anchored at edges of the offshore platform so as to load and unload personnel and goods. This method is very energy-consuming and wastes a lot of time, and interrupts normal operations of the offshore platform, resulting in a quite poor flexibility of the offshore platform.

SUMMARY

The present disclosure provides an offshore platform embarkation facility and an offshore platform, aiming at solving the problem with the existing offshore platform that the entire platform is required to be brought down to the sea surface when loading and unloading personnel or goods, and for each time of loading or unloading, normal operations of the platform need to be interrupted, which is energy-consuming and time-consuming.

The technical solutions provided in the present disclosure are as follows:

An offshore platform embarkation facility, including a lift tower (frame), wherein the lift tower is provided with a climbing device and the lift tower is provided with a transmission structure; a jacking frame (fixed pile frame), wherein a first moon pool allowing the lift tower to pass through is provided in the jacking frame; a lifting unit, wherein the lifting unit is installed on the jacking frame and is configured to cooperate with the transmission structure to raise and lower the lift tower; a lift platform, wherein a second moon pool allowing the lift tower to pass through is provided in the lift platform, and the lift platform is connected with the lift tower via the climbing device, and the lift platform is located below the jacking frame.

Furthermore, a (position) limiting device is fixedly mounted at a bottom end of the lift tower, wherein the limiting device is configured to restrict a movable range of the lift platform on the lift tower.

Furthermore, at least one set of rollers is further included, wherein the at least one set of rollers is mounted on the lift platform with the rollers close to the second moon pool, and cooperates with the transmission structure, and the at least one set of rollers is configured to allow the lift platform to slide up and down along the lift tower.

Furthermore, the lift platform is hollow inside.

Furthermore, the climbing device at least includes a stairway and an elevator, wherein the stairway is arranged on the lift tower from top to bottom, an upper end of the stairway is connected with the jacking frame, a ramp (movable stairs) is connected with a lower end of the stairway, a lower end of the ramp can slide on an upper surface of the lift platform for connecting the lift platform and the stairway, the lower end of the stairway is provided with a limiting device configured to restrict a rotation angle of the ramp to a range of 15°˜60°, and the elevator is arranged on the lift tower.

Furthermore, the lifting unit includes a (speed) reduction device and a power device, wherein an output end of the power device is connected with an input end of the reduction device, and an output end of the reduction device cooperates with the transmission structure.

Furthermore, at least one roller support device is respectively provided at each of two sides to which the lift tower swings relative to a vertical direction, wherein each roller support device includes: a base, a roller and a roller carrier, the base is mounted on the jacking frame, the roller carrier is mounted on the base, and the roller is rotatably connected with one side of the roller carrier and abuts the lift tower, wherein when the lift tower is raised or lowered, the roller rotates in a vertical direction around an axis of itself.

Furthermore, a wedge groove (slot) is formed between an upper portion of the roller carrier and the lift tower, wherein when an attitude of the lift tower is fixed, a wedge for pile fixation is inserted in the wedge groove, with the wedge for pile fixation abutted against the wedge groove.

Furthermore, a sensor and an electrical control system are further included, wherein the sensor is installed below the jacking frame and is configured to sense a spacing between the lift platform and the jacking frame, and the electrical control system is in communication connection with the lifting unit, the elevator and the sensor respectively.

An offshore platform, including the above offshore platform embarkation facility, wherein when the offshore platform needs to move, the lifting unit enables the lift tower to move upward by driving the transmission structure, so as to elevate the lift platform until it leaves the sea surface; and when the offshore platform needs to be stationed, the lifting unit enables the lift tower to move downward by driving the transmission structures such that the lift platform is lowered onto the sea surface.

Compared with the prior art, the offshore platform embarkation facility and the offshore platform provided in the present disclosure bring at least one of the following technical effects:

(1) With the offshore platform embarkation facility and the offshore platform provided in the present disclosure, when it is needed to load or unload personnel or goods, it is not required to lower the entire offshore platform to the height of the sea surface to enable a ship to be anchored, loading or unloading of personnel and goods can be quickly completed simply by means of the offshore platform embarkation facility, and when loading goods, it is not required to stop normal operations of the offshore platform, which saves energy consumption and time, improves the work efficiency and increases the service life of the offshore platform.

(2) For the offshore platform embarkation facility and the offshore platform provided in the present disclosure, when the offshore platform embarkation facility is in a use state, the lift platform can float in water with a self-adaption to its height, and adjust its position on the lift tower without the need of manually adjusting the height of the lift platform.

(3) For the offshore platform embarkation facility and the offshore platform provided in the present disclosure, when the offshore platform is ready to change its stationing location, the entire offshore platform embarkation facility may be retracted to leave the sea surface, which will not affect normal sailing of the entire offshore platform and has a small effect on the offshore platform.

