Mooring turret of drilling ship. RU patent 2508223.

IPC classes for russian patent Mooring turret of drilling ship. RU patent 2508223. (RU 2508223):

E21B43/01 - specially adapted for obtaining from underwater installations (underwater well heads E21B0033035000)

B63B35/44 - Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices

B63B22/02 - specially adapted for mooring a vessel

Another patents in same IPC classes:

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Ship for underwater oil production platform supply / 2498923
Invention relates to ship building, particularly, to drilling platforms and to oil and gas production at offshore deposits. Supply ship comprises solid hull and light hull of flooded pilothouse. Ship hull is composed of submarine-type solid hull with set of sealed lock hatches thereat. Besides, this ship is equipped with communication platform equipped with gate channel arranged vertically to extend through deck and bottom of said platform. Ship solid hull bottom incorporates extra sealed lock hatch equipped with the seat of sealed joint between supply ship and communication platform. Gate channel branch pipe doubles as the platform solid hull. Seats of sealed joint between supply ship and communication platform are arranged above sealed lock hatches of gate channel. Communication platform deck accommodated supply ship bottom slip. Underwater oil production platform light hull accommodates rope winches and flexible hose mechanised reels. Oil production platform solid hull outer section accommodates extra hatch of sealed lock integrated with sealed joint for mating seat at communication platform. Oil production underwater platform deck accommodates the slip for communication platform bottom.

Disconnection method of buoy from ship, and device for its being used in this method / 2508222
Invention proposes a disconnection method of a buoy from a mooring turret in a system including a ship containing a mooring turret installed so that it can be rotated on the ship, and a buoy carrying uprising pipelines, which can be attached to the mooring turret and disconnected from it. The system also includes moorings attaching the buoy to mooring points at sea bottom and loading the buoy with mooring forces. Before the buoy is disconnected from the mooring turret, moorings are manipulated so that at least at disconnection the mooring forces are decreased or even disappear. A retaining and releasing device includes a housing with at least two clamps for the mooring, which are located at some distance from each other and made so that an excessive part of the mooring can be located between them. At least one clamp can be installed to the mooring lowering position.

FIELD: mining.

SUBSTANCE: according to the invention, inside the housing of a drilling ship mooring turret, which has a cylindrical housing with a drilling shaft and an anchor retention system of the ship, in its lower part there installed is an annular cylindrical structure with ballast compartments, which can move vertically along guides below the main plane of the drilling ship. Inside the shaft there arranged are deflectors located along the perimeter of the shaft on its walls above the ship waterline.

EFFECT: invention of a drilling ship mooring turret structure allows protecting a riser pipe at drilling operations under ice conditions and protecting against flooding of an upper deck of the drilling ship through the drilling shaft at stormy drift or at transition of the drilling ship under conditions of considerable disturbance, especially at negative air temperature contributing to formation of ice on deck structures of the drilling ship.

2 dwg

The invention relates to the field of exploration and vessels for exploration, namely to exploration drilling, and relates to the issue of ensuring protection columns (riser card) during the drilling operation in ice conditions and protection from the upper deck of a drilling ship through the drill shaft with a stormy drift.

Known sentry gun drilling ship exploration drilling and mining vessels type FPSO, on anchor links, providing reversal of the ship to reduce impact on its housing-prototype ("Turret for drilling or production ships", №5359957 from 01.11.1994, Norsk Hydro a.s. Oslo, Norway and Swivel device", № US 6302048 B1 from 16.10.2001, Hitec Systems AS, Forus).

However, use a known turret for ships operating in Arctic and far Eastern seas, is not possible due to lack of protection riser card from mechanical damage with ice floes, passing under the bottom of the vessel during the drilling operation in ice conditions and lack of protection from the upper deck of a drilling ship through the drill shaft with a stormy drift (100-year storm or when drilling vessel under the influence of waves, especially at negative temperatures conducive to icing deck designs drilling ship.

Objective of the proposed the invention is to secure the riser card from mechanical damage with ice floes, passing under the bottom of the vessel during the drilling operation in ice conditions and protection from the upper deck of a drilling ship through the drill shaft with a stormy drift

To do this, inside the hull turret of a drilling ship, which has a cylindrical body with mine drilling and system anchor hold of the vessel, according to the invention in its lower part there is a circular cylindrical design with ballast compartments, made with the possibility of vertical travel along the guides below the main plane of a drilling ship. Inside the mine placed vents along the perimeter of mine on its wall of the vessel above the waterline.

Circular cylindrical design with ballast compartments, made with the possibility of vertical travel along the guides, provides typing in ballast ballast compartments from the surrounding space and water sinks below the main plane of a drilling ship, protection raiser from extrinsic ice, passing under the bottom of the vessel.

Vents along the perimeter inside the shaft above the waterline, reduce the speed and pressure of the water flow entering the mine from the floor by changing the direction of its motion, and thus prevent the ingress of water on deck.

The essence of the invention is illustrated by drawings, where

Figure 1 - General view of the proposed sentry gun drilling ship;

Figure 2 - protection deck of a drilling ship from through the air vents.

Inside the hull turret 1 drilling ship 2, bottom, installed circular cylindrical design 3 with ballast compartments 4, to protect raiser 5 damage from ice 6, which has a possibility of vertical movement down below the main plane 7 drilling ship on rails 8, taking water ballast (figure 1).

In the hull turret 1 there is a shaft 9, inside which in drilling works is formed raiser 5.

Along the perimeter of the walls of 10 mines 9 above waterline 11 2 vessel has deflectors 12 to reduce the speed and pressure of the water flow 13 at considerable agitation, and to exclude the upper deck of a drilling ship through the drill shaft 9, especially with negative temperatures conducive to icing deck designs drilling vessel (figure 2).

The proposed sentry gun works as follows.

Drilling operations in ice conditions ballast compartments 4 ring cylindrical design, 3 are filled with water from the surrounding water space, and it falls on rails 8 down below the main plane 7 drilling ship, thus securing the riser 5 from extrinsic ice 6, passing under the bottom of the vessel is 2.

During the transition drilling vessel under the influence of waves or stormy drift (100-year storm), especially with negative temperatures conducive to icing deck constructions of a drilling ship, protection of the upper deck of a drilling ship from through the drill shaft 9 provide deflectors 12, located within the perimeter of the walls of 10 mines 9 above waterline 11, providing reduction of the velocity and the pressure of the water flow 13 falling in mine 9 from the floor by changing the direction of its motion.

The invention sentry gun drilling ship provides protection riser card from mechanical damage with ice floes, passing under the bottom of the vessel during the drilling operation in ice conditions and protection from the upper deck of a drilling ship through the drill shaft with a stormy drift (100-year storm or when drilling vessel under the influence of waves especially at negative temperatures conducive to icing deck constructions of a drilling ship, not only during the navigation period, but also in ice conditions and allows guarantee the safe perform drilling operations in the Arctic and far Eastern continental shelf, which is an important advantage compared to existing drill-ships oil and gas industry, as well as improves the performance of drilling equipment while reducing labor intensity of drilling works, that it distinguishes from the prototype.

Sentry gun drilling ship, which has a cylindrical body with mine drilling and system anchor hold of the ship, wherein the inside of the hull turret in the lower part, installed circular cylindrical design with ballast compartments, made with the possibility of vertical travel along the guides below the main plane of a drilling ship, and placed inside the mine vents along the perimeter of mine on its wall of the vessel above the waterline.