Installation and method for provision of drilling operations in the open sea

 

(57) Abstract:

The invention relates to shipbuilding, in particular to plants and ways to ensure that drilling operations at sea and in shallow inland seas and lakes. Installation for drilling operations in the open sea contains oil rig, a support structure for a drilling rig having a base for installation on the seabed, the deck for attaching the rig, made in the form of concrete block with an empty cavity, allowing the block to swim to the place of drilling and adapted to receive ballast in such manner and in such quantity to cause the block to sink the basis of forward and installed on the seabed with deck above the surface of the sea. The unit has a tender barge, which is adapted to move to the place of drilling at a water depth of more than 1.5 m for maintenance and support equipment rig. The way to ensure drilling operations in the open sea includes shipping by water to the place of drilling hollow floating support structure, the delivery of water rig to the support structure, placing the rig on the deck of the support structure and the movement of the tender barge to the drill site. Dostugu water at depths from 2 to 10 m 2 C. and 15 C.p. f-crystals, 4 Il.

The present invention relates to an apparatus and method for providing drilling for oil and gas in the open sea and in shallow inland seas or lakes.

The word "small" means that the water depth varies in the range between 2 m and 10 m on the space covered with the water surface. Such sea can have severe wave conditions. This is a typical inland sea is the Caspian sea. Under encountered in this description the word "sea" should be understood also freshwater lakes and of course any inland waters. It is known that in small inland seas and lakes is carried out exploration and exploitation of oil and gas fields.

Conventional methods involve the use of so-called furnace barges or in another case, a so-called drilling rig with a lifting device of the tender drilling module, or using the platform of a drilling device, a floating to a fixed platform and we install them for drilling wells.

Fenny barge is a large flat-bottomed vessel with a large surface area and shallow draft. As you can guess from the name, it is used mainly Nepalese. Drilling is carried out when the barge is submerged position after taking ballast in such a way that its bottom rests on the seabed. The ability to perform operations is limited by the depth of the sea, which should create the ability to move a barge on the surface and at the same time not be too large so as not to fill the raised deck.

Drilling rig with a lifting device is floating module, which is mounted drilling rig. The platform has drawn extendable supports. With drawn supports, the platform floats on the sea surface to the drill site. After arriving at the desired point of support are extended to raise the platform above the expected level, the highest waves, and then the position of the supports is temporarily fixed. As reliance should not touch the seabed in the period when the platform is moved to the drill site, it is limited to the minimum water depth in the area of operations. Mainly rigs with lifting devices unsuitable for very shallow water.

Tender drilling module is a barge carrying oil rig and associated drilling equipment. Rig is moved on a fixed platform for wypada and is used with permanently fixed platforms.

The above methods allow you to drill wells in shallow water, but each method is limited to the appropriate depth range.

Drilling can also be done on a fixed platform, using established on the platform of the drilling device, raised on a platform for this purpose. The platform, however, must be large enough to accommodate the drilling rig, and is a permanent structure installed before drilling, which can have unpredictable in advance the result.

In U.S. patent N 3793840, CL E 02 B 17/00, from 26.02.1974, disclosed installation for drilling operations in the open sea, containing oil rig, a support structure for a drilling rig having a base for installation on the seabed, the deck for attaching the rig and an empty cavity, allowing the support structure to swim to the place of drilling and adapted to receive ballast inside the cavity in such manner and in such quantity to cause the support structure to sink a ground down and remain on the seabed with the deck above the surface of the sea.

This unit is the way to ensure drilling operations at sea, including delivery of water to the place of the hole is the day, and the deck, remote from the base to a distance sufficient to support the drilling rig above sea level when the base is on the seabed, filling the support structure ballast sufficient to cause it to sink so that its base was located on the seabed, and the deck above the surface of the sea.

Disclosed in the mentioned U.S. patent and installation methods have the same disadvantages as the previously described methods and installation.

The technical result of the present invention is to provide an economical installation and method for provision of drilling operations in the open sea, allowing exploratory drilling and operation of wells in water depths from 2 to 10 meters and use standard and designed for drilling on a hard surface drilling rigs, requiring little expensive modifications.

This technical result is achieved by the fact that the installation to ensure drilling operations in the open sea, containing oil rig, a support structure for a drilling rig having a base for installation on the seabed, the deck for attaching the rig and an empty cavity, allowing the support structure plotby to cause the support structure to sink a ground down and remain on the seabed with the deck above the surface of the sea, according to the invention includes the tender barge, which is adapted to move to the place of drilling at a water depth of more than 1.5 m for maintenance and equipment of the drilling rig.

Preferably, the tender barge was made to move at a water depth of 1.5 to 15 meters.

Preferably, the supporting structure was made on the basis of concrete and had wells, passing vertically through it and intended to pass through the support structure borax and pipes.

It is advisable to tender barge had a key slot adapted to accommodate the support structure and coupling with it.

It is possible to tender barge had an inner casing made of steel and the outer casing of concrete. This will prevent the barge from severe frost and ice in some areas of the world in winter, in particular in Russia, including the Caspian sea.

It is desirable that there is at least one anchor barge, made with the possibility of separation from the tender barge, and preferably, if such barges will be two.

Conveniently, if you have a barge for stay of the crew, made possible with the train and the what a way to provide drilling operations at sea, including delivery of water to the place of drilling hollow floating support structures supporting the drilling derrick having a base for installation on the seabed, and the deck, remote from the base to a distance sufficient to support the drilling rig above sea level when the base is on the seabed, filling the support structure ballast sufficient to cause it to sink so that its base was located on the seabed, and the deck above the surface of the sea, according to the invention includes the delivery of water rig to the support structure, placing the rig on the deck of the support structure and the movement of the tender barge to the place of drilling at a water depth of more than 1.5 m for maintenance and equipment of the drilling rig.

It is advisable to use the tender barge, which is adapted to move at a water depth of 1.5 to 15 meters.

It is desirable that the supporting structure installed on a tender barge before sailing to the drill site and transported by barge to its mounting location in the sea.

It is possible to rig installed on the tender bar is>/P>Possible after the installation of the support structure in position to carry out the movement of the tender barge to the support structure for placing the latter in the key groove of the tender barge and clutch with her.

Preferably, at least one anchor barge was moved to the drill site to connect without engagement with the tender barge.

It is possible that the second anchor barge moved to the drill site to connect without engagement with the tender barge.

It is desirable that the barge for a stay of the crew moved to the drill site to connect without coupling with the tender barge.

An embodiment of the invention will be described below with reference to the drawings, in which:

Fig. 1 and Fig. 2 schematically depict views from the side of the tender barge and support structure installation to ensure drilling operations in the open sea according to the invention;

Fig. 3 depicts schematically a view in plan of the tender barge and supporting structures;

Fig. 4 depicts a side view of the barge and rig operations in place.

Installation for drilling operations in the open sea includes the drilling rig 1 (Fig. 4), a support structure and what ERDAS surface for exploration and exploitation, and so will not be described.

The reference design is standard and is made in the shape of an elongated blank of block 2, in which concrete wall form a cavity (not shown).

The block 2 is made buoyant and can float on water. Block 2 has the lower flat base 4 for placement on day 5 sea 6 and the upper flat deck 7, which is installed when using rig 1. Hollow block 2 capable of receiving ballast is well known manner for installation on the seabed.

Through the block 2 are vertically from his deck to his Foundation of the four wells (not shown), the design of which is well known. These wells are open at one end on the deck 7 of the block and at the other end on the base 4 and, as is well known, are channels for drill bits, drill rods and tubes, and provide access to the bottom of the sea during drilling. Height of unit 2 should be chosen so that when placing it on the seat deck 7 was higher than the maximum expected sea level and impact of waves.

The tender barge 3 is adapted to move to the place of drilling at a water depth of 1.5 m, for example from 1.5 to 15 meters. It includes a flat-bottomed sun has a flat bottom 9, stern in the General case in the form of a flat wall 10, two flat vertical sides 11 and 12 and the nose 13 which forms located at the center of the key groove 14 adapted for placement unit 2 and the clutch with it. The bottom feed side and the nose of the barge 3 include internal lining of steel and the outer casing of concrete. Barge 3 are divided into two decks, the lower deck 15 and the upper deck 16. On the lower deck 15 posted by support drilling and warehouses. On the upper deck 16 are racks for tubes, premises and equipment for drilling.

As shown in Fig. 4, the upper deck 16 is provided on the circumference of the enclosure 17. The valve 18 on tracks designed to move the component relative to the upper deck 16 and the upper deck 16 of the barge 3 on deck 7 of block 2, as well as from the deck 7 to deck 16. Node 19 rack tubes are also shown in Fig. 4.

To ensure that drilling in the open sea unit 2 is first installed on the barge 3 and then is delivered to the barge 3 from the shore to the selected and set in the sea (Fig. 1) by means of lifting appliances mounted on the barge 3. The ballast is introduced into unit 2 in a known manner to lower his base down on the seabed (Fig. 2).

Tender meshaetsia in position, when the unit 2 is located between the walls of the groove 14.

Before sailing rig 1 is also installed on the deck of the barge 3 and 3 loaded barge other necessary equipment and materials, including the valve 18 and the other previously mentioned equipment.

After unit 2 is installed on the bottom of the sea, rig 1 along the guide rails are installed in sockets on the deck 7 of block 2. The tender barge 3 then remains in position when the unit 2 is located inside the groove 13, with a variety of equipment is transferred from the barge to the deck 7 of block 2 in order to begin drilling.

Standard support barge or two standard reference barges, not shown in Fig. 1-4, can swim to the tender barge for replenishment of equipment and other supplies. One of these barges can be returned to the Bank for replenishment at the same time as the other loads the tender barge.

In addition to the standard barge to stay crew may come to tender barge.

Anchor barges and barge for a stay of the crew can be connected with the tender barge ladders or something similar in order to create the possibility of free transfer crew between barge fruitless, the unit can be left whole, and rig and tender barge can be removed and when separated and moved to another location for further exploration and, in addition, the block may be removed from the bottom of the sea and moved to another place of drilling.

When the stage of the using block for drilling is completed, the unit can be used on the operating platform.

Describes how to install can provide exploration drilling and operation of wells in water depths varying from 2 to 10 meters.

The concrete cover on the tender barge can provide protection from ice thickness of up to 1 meter, which is found in some inland seas.

The method allows the use of standard and designed for drilling on a hard surface drilling rigs, requiring little expensive changes.

In some parts of the world there are limited opportunities for production or not exist at all, and therefore all components of any conventional drilling or production platforms must be delivered there at a high price. All components of the equipment described in this invention can be made at the local nizkotexnologichno esavana as production platforms. If the site requires additional wells, you can add additional supporting structures of various configurations to create a large mnogosloinykh platforms. The extension works can be easily adjusted depending on the results of drilling at this location, thereby avoiding risky installation of large platforms to gain knowledge about the real state of the field. The support structure without wells can also be used in various ways as cheap components production platforms in the module development.

1. Installation for drilling operations in the open sea, containing oil rig, a support structure for a drilling rig having a base for installation on the seabed, the deck for attaching the rig and an empty cavity, allowing the support structure to swim to the place of drilling and adapted to receive ballast inside the cavity in such manner and in such quantity to cause the support structure to sink a ground down and remain on the seabed with a deck above the sea surface, characterized in that it includes tender barge, which is adapted to move to the place of drilling at depth Vaudoise fact, that tender barge is arranged to move at a water depth of 1.5 to 15 m

3. Installation under item 1 or 2, characterized in that the supporting structure is made of concrete.

4. Installation according to p. 3, characterized in that the supporting structure has wells.

5. Installation according to any one of paragraphs.1 to 4, characterized in that tender barge has a key groove adapted to accommodate the support structure and coupling with it.

6. Installation according to any one of paragraphs.1 to 5, characterized in that tender barge has an inner casing of steel and the outer casing of concrete.

7. Installation according to any one of paragraphs. 1 - 6, characterized in that it has at least one anchor barge, made with the possibility of connection without engagement with the tender barge.

8. Installation according to p. 7, characterized in that it has a second anchor barge.

9. Installation according to any one of paragraphs.1 to 8, characterized in that it has a barge for a stay of the crew, made with the possibility of connection without engagement with the tender barge.

10. The way to ensure drilling operations at sea, including delivery of water to the place of drilling hollow floating support structure that supports the drilling viskit oil rig above sea level, when the base is on the seabed, filling the support structure ballast sufficient to cause it to sink so that its base was located on the seabed, and the Holly - above the sea surface, characterized in that it includes the delivery of water rig to the support structure, placing the rig on the deck of the support structure and the movement of the tender barge to the place of drilling at a water depth of more than 1.5 m for maintenance and equipment of the drilling rig.

11. The method according to p. 10, characterized in that the use of the tender barge, which is adapted to move at a water depth of 1.5 to 15 meters.

12. The method according to p. 10 or 11, characterized in that the supporting structure is mounted on a tender barge before sailing to the drill site and transported by barge to its mounting location in the sea.

13. The method according to p. 12, characterized in that the rig is mounted on a tender barge before sailing to the drill site and then moved on a support structure installed in the sea.

14. The method according to any of paragraphs.10 to 13, characterized in that after installation of the support structure in the desired position of the exercise movement tenders is SS="ptx2">

15. The method according to any of paragraphs.10 to 14, characterized in that the at least one anchor barge is moved to the drill site to connect without engagement with the tender barge.

16. The method according to p. 15, characterized in that the second support barge is also moved to the drill site to connect without engagement with the tender barge.

17. The method according to any of paragraphs.13 to 15, characterized in that the barge to stay crew moves to the drill site to connect without coupling with the tender barge.

 

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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

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