Semi-submersible drilling rig

 

(57) Abstract:

Semi-submersible drilling rig is designed for mining on water-covered areas. It includes supporting pontoons, drilling platform and connecting the rack. The drilling rig is made floating. The drilling platform and the pontoon portion is made releasable interconnected with the possibility of independent movement in the water and on solid surfaces. The connector between the platform and the pontoon part is displaced towards the platform. Pontoon part is divided into parts with the possibility of independent movement. Is achieved using the rig at any depth, the waters covered by ice, as well as for use on land. 1 C. p. F.-ly, 2 Il.

The invention relates to the field of devices for the extraction of minerals, mostly covered by water territories, including the freezing waters, and more particularly to a semi-submersible floating drilling rigs (SFDR).

Known stationary and semi-stationary ice-resistant platform (patent N 1806243, E 02 B 17/00, publ. 1993, N 1822892, E 02 B 17/00, publ. 1993).

The platform is convenient for drilling operations, one is the new position also requires a high cost.

Famous underwater semi-permanent installation, for example, patent of Russia No. 2040637, E 02 B 17/00, publ. 1995. A similar design is convenient to perform drilling at great depths in the freezing waters, but they generate a lot of problems by providing a comfortable environment and personnel safety. In addition, they are unsuitable to work at shallow depths in the winter in places of passage of the ice fields.

Known SFDR "windowed" type, which in the absence of ice are partially above the water surface, and the passage of the ice fields is completely submerged under the ice cover, for example, patent of Russia No. 2014243, B 63 B 35/44. The device is quite effective when drilling large and medium depths. However, when operating in ice conditions comformist and safety of the operating staff is significantly reduced. In addition, such devices may not be used in winter at shallow depths.

Known SFDR type "Shelf", see W. "Shipbuilding technology" No. 5, 1983, S. 2 covers and S. S. 81 - 84, E. P. Visak and others, "improving the technology of construction of semi-submersible". These SFDR include surface drilling platform, submersible support floats (s depths in open water, as well as a comfortable environment for staff. However, in waters covered by ice, such devices are not applicable. This unit is adopted as a prototype.

The purpose of this invention is to provide a universal semi-submersible, suitable for use at any depth, the waters covered by ice, as well as for use on land.

This goal is achieved by the fact that the SSDR, including supporting pontoons, drilling platform and connecting the rack has the following differences: the drilling platform and the pontoon portion is made releasable, the drilling platform is made floating, while each part is made with the possibility of independent movement in the water and on solid surfaces. This design SFDR at work in the ice is divided into surface and underwater parts. The platform at a sufficiently solid ice surface lands on the moving ice and moves over its surface, remaining in the area of drilling and continuing the drilling process, and the pontoon portion is moved in a submerged position.

If not strong enough moving ice cover platform when disconnecting landed on the ice, continuing the drilling, and the pontoon part of the POG is a rounding of ice under the platform and to increase the bearing capacity of ice.

If the drill site can be passed through fields thick ice and moving pontoon parts under the ice would be impossible, in the present design semi-submersible, with the purpose of ensuring the preservation provides as follows: the connector between the platform and the pontoon part is displaced towards the platform, and the pontoon part is divided into two or more parts, with the possibility of independent movement. All parts in difficult ice conditions move along the outer surface of the ice separated nodes pontoon parts are translated into the most convenient for transporting position by changing the buoyancy of the pontoons.

The invention is shown in Fig. 1 and 2. In Fig. 1 shows the side view of the Jack up, leading drilling when passing over the site of the drilling fields fragile ice. In Fig. 2 depicts the end view on the Jack up with is divided into parts pontoon part.

In Fig. 1 shows the SFDR, which includes a platform 1 having positive buoyancy of the pontoons 2, 3 hours, connecting the platform 1 and the pontoons 2, the propulsion 4 platform and propulsion 5 pontoon parts, providing independent movement leaning on a hard surface (9 - additional drivers for pantheistically 3 has very large dimensions, which in some cases may prevent movement under the ice, it can be performed as shown in Fig. 2, is divided into parts 6 and 7 and connectors 8, which, after separation can be translated in a horizontal position and in this position to go on the ice surface on their own, what they are equipped with additional thrusters 9; 10 - surface water or ice.

SFDR is as follows.

When working on the open water mainly in the summer SFDR produces drilling, being anchored over the drill site. While drilling platform 1 is placed on a pontoon parts, consisting of pontoons 2 and uprights 3, and is securely connected by means of a special clamping devices (not shown). When working on covered or already covered by ice water when storm activity is reduced, the anchor device are retrieved and hold SFDR over the area of the drilling is carried out using special dynamic systems hold. If the ice is not solid enough, is its destruction in the area SFDR, for example, with the help of an icebreaker. When ice acquires sufficient strength, and passing the fields of pack ice fix what goes on the ice. This pontoon part, if the depth under the ice, clinging to its back surface and creating a force from below on the ice, approximately equal to the weight of the platform 1, which is achieved by adjusting the buoyancy of the pontoon parts. In this position, the ice caves and provides additional carrying capacity. Drilling continues, the ice is destroyed only in the immediate area of the drill rod. After passing through the ice field platform straddles the pontoon portion without interrupting drilling operations.

With the passage of moving ice fields of thick pack ice, especially in shallow water, the drilling stops, the platform is on the ice and moving relative to the moving ice, continues to hold above the area of drilling, and the pontoon part or percentagewise to propulsion, which is usually in contact with ice, face down, or divided into parts 6 and 7, which thus occupy a horizontal position, also goes on the ice and moves with the platform. After passing through the ice field elements pontoon parts are in the water, dock between themselves and assume the platform, after which the drilling is resumed.

After the rather new place and resumes work.

If necessary drilling on land, for example, on Islands, semi-submersible dives to the platform, the platform is detached, its course dolivet to shore and landfall.

The proposed construction SFDR allows year-round operation for the extraction of gas, oil, and other mineral resources in the Northern areas, to reduce costs for the development of subsea fields, to develop even not too rich deposits. Floating Islands, made on the basis of the proposed scheme SFDR, will create a more secure research station for the study of the Arctic ocean, and will implement a number of other possibilities.

1 1. Semi-submersible drilling rig, including the supporting pontoons, drilling platform, connecting them to the rack, wherein the drilling rig is made floating, while the drilling platform and the pontoon part is split among themselves the possibility of independent movement in the water and on solid surfaces. 2 2. Installation under item 1, characterized in that the connector between the platform and the pontoon part is displaced towards the platform, and the pontoon part is divided into parts with the possibility of not

 

Same patents:

The invention relates to the construction of offshore drilling platforms, which reflects the apparatus and method of transporting and installing the deck of an offshore drilling platform at sea reference base

The invention relates to the field of underwater storage of vessels and inside of General, bulk and liquid cargoes in the absence of the ships crew, as they lowered to a predetermined depth, and rise to the surface occur automatically upon command from shore remote control transferred to the vessel by a flexible water-resistant power cable, plug on one end connects to the socket on Board the vessel, forming a sealed waterproof electrical connections, and the other end is connected to the remote

The invention relates to hydraulic construction

The invention relates to hydraulic structures (artificial Islands), mainly to exploration and production offshore drilling units (MBU)

The invention relates to the field of hydraulic engineering construction, in particular, to devices for setting and fixing the Arctic marine platforms

The invention relates to hydraulic construction and can be used, mainly, in the construction of fixed platforms for oil and gas on the shelf of the freezing seas

The invention relates to hydraulic construction, in particular to methods for construction of offshore platforms

The invention relates to hydraulic construction and can be used in the construction of offshore Jack-up platforms

The invention relates to the construction of offshore drilling platforms, which reflects the apparatus and method of transporting and installing the deck of an offshore drilling platform at sea reference base

The invention relates to the field of underwater storage of vessels and inside of General, bulk and liquid cargoes in the absence of the ships crew, as they lowered to a predetermined depth, and rise to the surface occur automatically upon command from shore remote control transferred to the vessel by a flexible water-resistant power cable, plug on one end connects to the socket on Board the vessel, forming a sealed waterproof electrical connections, and the other end is connected to the remote

The invention relates to the field of submarine shipbuilding and is designed to perform drilling operations on the bottom of seas and oceans

The invention relates to Oceanography and hydrology, in particular to surface drifting and stationary floating Islands, which can be used for a variety of scientific research, for placing control, research and rescue services, as a seaside resort or recreation, as well as comfortable places to stay human in the ocean, etc

The invention relates to wet concentration Sands of alluvial deposits and may be used for the production of a wide spectrum of minerals in the waters of the hydraulic

The invention relates to shipbuilding, in particular to the floating berths used for berthing and docking of one or more vessels for storage of goods that intensively arriving in the courts in the last navigation time by shipping them to consumers in internavigational period, as well as for storage of goods and provision of cargo handling

The invention relates to structures that are installed in the open sea, in particular to a device for absorbing energy when installing the flooring on the ground in the open sea

The invention relates to shipbuilding concerns the construction of offshore drilling rigs considering improving erosion-corrosion resistance of exterior cladding in terms of the impact of ice in sea water and can be used in other marine equipment designed for operation in ice conditions

FIELD: shipbuilding; manufacture of mobile research complexes.

SUBSTANCE: proposed complex is made in form of ship with small waterplane area having upper and lower hulls interconnected by means of telescopic columns for disconnection and autonomous motion of these hulls. Lower hull is submersible vehicle and upper hull is amphibian. Both hulls are provided with greenhouses and power units for generation of energy for motion of complex, domestic and technological purposes, as well as for growing vegetables, sea products and production of distilling water by motion of spheres with plant containers located spirally on their surfaces, thus ensuring generation of electric power. In addition to vegetation tubes with plants growing chains are provided where sea products are contained for distilling sea water by change in pressure and level of illumination and growing chains for growing fish and preparation of nutrient solution for plants. Lower hull is provided with plankton trawls for delivery of plankton for greenhouse and power plants of lower and upper hulls for growing fish and sea products. Amphibian supplies fresh air to submersible vehicle through its collector; it is also used for transportation of sections for erection of scientific research station. Provision is made for delivery of light to submersible vehicle through lenses, light conduits and structural sections and light conduits of collector of vehicle.

EFFECT: environment control.

4 cl, 22 dwg

Up!