Support stand-anchor of marine platform

FIELD: construction.

SUBSTANCE: invention relates to construction of platforms to mount drilling and oil production equipment in the sea. The support stand-anchor of the marine platform comprises joined upper section with the upper support site, ballast cisterns-sections and the lower drilling section, in which there is a hydraulic engine installed, to the shaft of the rotor of which a drill is connected, and a pipeline of water drain and a nozzle of water drain are connected to the stator of the hydraulic engine. At the same time on the marine platform in the control cabin the system of filling-emptying of ballast cisterns-sections additionally comprises a compressor for compressed air, the outlet of which via serially connected first valves and three-way switching valves are connected to pipelines of compressed air supply, hydraulic pumps. Between ballast cisterns-sections there are remote support sections, the upper section is made in the form of two coaxial hollow cylinders arranged relative to each other coaxially. The upper support site by means of hinge parts rigidly connected to it and the marine platform, may rotate around the common axis of the hinged joint, and with it the entire support stand of the anchor with removal of the bolt joints by means of its transition from the vertical working position into the horizontal transport position.

EFFECT: expansion of functional capabilities of a support stand-anchor and reduction of axial load.

2 dwg

 

The invention relates to the field of drilling oil and gas wells on the continental shelf, namely, for construction of offshore platforms on which is mounted drilling and oilfield equipment.

Known pile - support-anchor offshore platform, containing connected between a flange connections the upper section with the reference area, the ballast pipe section - ballast tank system filling-emptying water and compressed air and the lower bore section, in which is mounted a hydraulic motor, to the shaft of the rotor which is attached helical blade and drill roller shield-Bur, and the stator hydraulic motor connected to a water discharge line pipeline water supply and drain pipe water.

System filling-emptying ballast tanks contains a supply line of compressed air, the supply pipe and water pipe with valves-Kingston valves for draining the water (see the description of the invention to the patent of Russian Federation №2071531, IPC E02B 17/00, publication 10.01.1997).

A disadvantage of the known reference rack-anchor is the lack of functionality.

The task of the invention is the extension of functional capabilities, which include:

the reduction in axial load due to the hollow lattice distance of the reference sections;

- use isawanya reverse drill for repeated use one rack for its intended purpose and transporting drilling platform together with the stand-anchor to a new drill site.

The invention consists in the following.

Support-anchor offshore platform containing interconnected flanged and threaded joints of the upper section with the upper reference area, ballast tanks-partition system of filling-emptying water and compressed air and the lower bore section, in which is mounted a hydraulic motor, to the shaft of the rotor which is attached a drill, and the stator of the hydraulic motor is connected to the pipeline water supply and drain pipe water system filling emptying ballast tanks-sections contains a supply pipe water pipe water drain and supply line of compressed air for emptying ballast tanks-sections from the water, on the sea platform in the wheelhouse control system for filling and emptying ballast tanks-sections further comprises a compressor for compressed air, the output of which is connected in series through the first valve and the three-way switching valve is connected to the piping of compressed air, which is able to release the air from the ballast tanks-sections when filling with water through the relevant provisions of the three-way switching valve and connected with them the second air release valve into the atmosphere, hydraulic pump, the output of which through the third CL the pan is connected to the supply line of the water in the ballast tank section; hydraulic pump, the output of which through the fourth valve connected to the first supply line of the water in the hydraulic motor, when the reverse rotation of the rotor in which the output of the hydraulic pump through the fifth valve connected to the second supply pipe water to reverse the hydraulic motor between ballast tanks-sections are remote reference section, the upper section is made in the form of two coaxial hollow cylinders placed relative to each other coaxially, from which the first cylinder is made with two locking and diametrically spaced holes and is rigidly connected with the top reference area and the second cylinder is made with two diametrically spaced spring clips and is rigidly connected with the flange of the upper section, thus forming a mechanical latch, the upper support platform means rigidly connected with it and the marine platform of the parts of the hinge can rotate around the common axis of the hinge, and with it all reference rack anchor for removal of bolted joints by transferring it from a vertical operating position to a horizontal transport position.

The invention is illustrated by drawings, where: figure 1. shows-support-anchor offshore platforms, General view; figure 2 is also with the marine platform in transport is ulozhenie.

Support-anchor offshore platform contains interconnected flanged and bolted connections 1 upper section 2 with the top reference area 3, the ballast tanks section 4, between which are located remote reference section 5 and the lower bore section 6, in which is mounted a hydraulic motor 7, the shaft 8 of the rotor which is attached Bur 9, and the stator of the hydraulic engine 7 is connected to the pipeline 10 water supply and the pipe 11 draining the water. System filling-emptying ballast tanks-sections 4 contains the pipeline 12 water supply pipe 13 water drain and pipe 14 compressed air for emptying ballast tanks-sections 4 from the water.

On an offshore platform in the wheelhouse control system for filling and emptying ballast tanks-sections 4 further comprises a compressor 15 for compressed air, the output of which is connected in series through the first valve 16 and the three-way switching valve 17 is connected to the piping 14 compressed air, which is able to release the air from the ballast tanks-sections 4 when filling with water through the corresponding provision of the three-way switching valve 17, and United with them the second valve 18 release air to the atmosphere, the hydraulic pump 19, the output of which through the third valve 20 is connected to the Truboprovod 12 of the water in the ballast tanks section 4.

Hydraulic pump 21, the output of which through the fourth valve 22 is connected to the first pipe 10, the water supply to the hydraulic motor 7, when the reverse rotation of the rotor in which the output of the hydraulic pump 21 through the fifth valve 23 is connected to the second pipeline 24 water supply to reverse the hydraulic motor 7. The upper section 2 is made in the form of two coaxial hollow cylinders 25 and 26, which are located relative to each other coaxially, of which the first cylinder 25 is made with two locking and diametrically spaced holes and is rigidly connected with the upper supporting platform 3, and the first cylinder 25 is made with two diametrically spaced lugs 27 and the second cylinder is made with two diametrically spaced spring clips 28 and is rigidly connected with the upper flange 2 hours, thus forming a mechanical latch. The upper support platform 3 by means rigidly associated and marine platform 29 parts of the hinge 30 is rotatable about the common axis of the hinge 30, and with it all reference rack-anchor for the removal of bolted joints 31 by transferring it from a vertical operating position to a horizontal transport position.

Support-anchor works as follows.

Interconnected sections gateposts anchors in horizontal the salvage position (see Fig 2) together with the marine platform is generated by a tug boat in the sea and are brought to the point at which you have to install the platform. Using the possibility of rotation around the common axis of the hinge 30 of the upper support point 3, together with fixed legs-anchor, translate and fix it in a vertical position by bolts 31.

Ballast tanks section 4 is filled with water through nozzles (kingstons) 13, by translation into the corresponding position of the three-way switching valve 17 and opening valves ventilation 18, connected to the pipe 14 for venting to the atmosphere. To expedite the process of filling ballast tanks optionally use the hydraulic pump 19, the water from exiting through the valve 20 is connected to the pipeline 12. As a result of filling ballast tanks-sections is an increase in the weight of the supporting rack anchors and more dense pressing her bottom together with offshore floating platform 29 on the magnitude of the force is equal to γ V (where γ is the density of water t/m3, V - volume ballast tanks, m3). Simultaneously stepwise filling of the auxiliary ballast tanks 32 offshore platform 29 for landing it on the rack anchors and pressed to the ground. Using a hydraulic pump 21, the output of which through to the apan 22 is connected to the pipeline 10 is to supply water in the hydraulic motor 7, and by rotating the shaft 8 of the rotor and rigidly secured on the drill 9 is burying the legs of the anchor into the ground. In the process of penetration into the ground legs of the anchor is an increase in the planting of a floating platform and a more rigid fixation of a floating structure on the ground. To ensure stability of floating structures at sea state requires that the vectors lifting force γ V and the weight of the P floating structure "platform-hour" were on the same line, and the center of gravity G is positioned between them. This position ensures the stability of the structure during the excitement of the sea and its moods on the angles θ due to the emergence of restorative moment M=a sin θ γ V (where a is the distance between the points of application of the lifting force γ V and the weights P, m; γ is the density of sea water t/m3; V is the volume of impermeable submerged part of the structure "platform-hour", m3).

The same conditions for stability must be observed during transportation, offshore platform to the installation site and after excavation rack anchors from the ground.

After completion of the work on the shelf for excavation support legs of the anchor in the ground by means of the compressor 15, the output of which is connected in series through the valve 16 and the three-way switching valves 17 through line 14 is supplied compressed air in the ballast tanks section 4 to displace ballast water through the nozzles 13. Simultaneously with the blowing ballast tanks stand is draining spare gateline tank 32 offshore platform 29. After displacing the water in the ballast tanks 4 leg anchor receives positive buoyancy and from the hydraulic pump 21 through valve 23 and pipe 24 serves water to reverse the hydraulic motor 7. In the reverse rotation of the shaft 8 of the rotor and the drill 9 is hollow drill 9 from the soil. Due to removal of bolted joints 31 and rotation of parts of the hinge 30 around its axis is rigidly associated rack anchor and formed by the blowing ballast tanks 4 positive buoyancy is the translation of the rack in a horizontal transport position. With the help of the guys ends (not shown in figure 2.) and lugs 27 hour-anchor is attached to an offshore platform in the horizontal transport position. Remote support section due to its lower permeability dynamic load on the supporting rack anchors at sea state and increase its resistance. Pipelines legs of the anchor can be made flexible in the form of high pressure hoses.

The claimed invention allows to:

- to extend the functionality of the supporting struts-anchor;

to reduce the axial load due to the hollow lattice distance of the reference sections;

- reuse hours for its intended purpose and to transport drilling platform in the natural with the stand-anchor to a new drill site.

Support-anchor offshore platform containing interconnected flanged and threaded joints of the upper section with the upper reference area, ballast tanks-partition system of filling-emptying water and compressed air and the lower bore section, in which is mounted a hydraulic motor, to the shaft of the rotor which is attached a drill, and the stator of the hydraulic motor is connected to the pipeline water supply and drain pipe water system filling-emptying ballast tanks-sections contains a supply pipe water pipe water drain and supply line of compressed air for emptying ballast tanks-sections of water, characterized in that on an offshore platform in the wheelhouse control system for filling and emptying ballast tanks-sections further comprises a compressor for compressed air whose outputs are connected in series through the first valve and the three-way switching valve is connected to the piping of compressed air, which is able to release the air from the ballast tanks-sections when filling with water through the relevant provisions of the three-way switching valve and connected with them the second air release valve into the atmosphere, hydraulic pump, the output of which through the third valve is connected to pipe the water in the ballast tank section; hydraulic pump, the output of which through the fourth valve connected to the first supply line of the water in the hydraulic motor, when the reverse rotation of the rotor in which the output of the hydraulic pump through the fifth valve connected to the second supply pipe water to reverse the hydraulic motor between ballast tanks-sections are remote reference section, the upper section is made in the form of two coaxial hollow cylinders placed relative to each other coaxially, from which the first cylinder is made with two locking and diametrically spaced holes and is rigidly connected with the top reference area and the second cylinder is made with two diametrically spaced spring clips and is rigidly connected with the flange of the upper section, thus forming a mechanical latch, the upper support platform means rigidly connected with it and the marine platform of the parts of the hinge can rotate around the common axis of the hinge, and with it all reference rack anchor for removal of bolted joints by transferring it from a vertical operating position to a horizontal transport position.



 

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13 cl, 3 dwg

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