Method of floating drilling rig movement by means of transport hovership system

FIELD: transport.

SUBSTANCE: method of drilling rig movement by means of transport hovership system includes movement over shallow waters and pulling floating drilling rig on air-cushion on slightly sloping shore. For movement over shallow waters delta anchors installed on ground using transport hovership equipment. To bring floating drilling rig on slightly sloping shore a bundle of three screw anchors is used which are screwed into ground by drilling rig located on deck of transport hovership. These anchors are joined with platform with roller block by adjustable rods. Pull winches and roller blocks are used on floating drilling rig to exit to shore. Roller block on anchor bundle platform and in floating drilling rig together with pull winch form tackle which permits to use winches with lower propulsive force for floating drilling rig pulling on anchors.

EFFECT: lower energy consumption during floating drilling rig movement over shallow waters and its pulling out to solid base with insignificant slope.

3 dwg

 

The invention relates to shipbuilding, namely floating drilling rigs.

Known complex for installation of fixed offshore platform and method of transportation and installation through complex for installation of fixed offshore platforms (U.S. Pat. Of the Russian Federation No. 2139973 from 26.01.1998, IPC EV 17/00).

The disadvantage of these known and the method of transportation and installation is the complexity of the complex due to the presence of special lifts and limited nautical characteristics of the floating dock, the operation of the above equipment requires highly skilled maintenance and has a low efficiency due to downtime of expensive equipment when you can't continuously.

Known also complex for installation of marine ice climbing platform and method of transportation and installation through complex for installation (U.S. Pat. Of the Russian Federation No. 2309221 from 14.10.2005, IPC EV 17/00).

The disadvantage of these complex for installation of marine ice climbing platform and the way of its transportation and installation through complex for installation is the complexity of the operation of the specified equipment, as well as the high complexity of this method.

The technical result of the claimed method of moving the floating drilling unit (MODU) means which of the complex transport hovercraft is to minimize energy consumption, associated with the movement PBU, as well as the possibility of pulling out on the shore with a slight slope without attracting any special land resources and shore equipment.

Since the standard boats cannot provide towing PBU in shallow water and taking it to the shore, and the use of watercraft, hovercraft requires installation of unreasonably powerful power plant to generate the required thrust, it was suggested that this invention.

The aim of the invention is the provision of the above tasks using equipment installed on a transport boat, hovercraft (TSIT) and PBU.

The principle of the invention consists in the following:

on TSIT, at the time of the task set is a set of equipment for winding and setting of anchors and anchor;

- PBU permanently installed traction winches and blocks rollers;

- TSIT attached to the deck rope pulling hoist goes to the place of registration of the anchors, while the traction winch PBU constantly wind up the rope;

- TSIT their means sets the anchor, attached to them, pulling ropes, to the ground;

- PBU using winches pulled on ropes to the place of registration of the anchor;

next TSIT their funds raises the anchor from the ground on the Board;

- p is the following which these steps can be repeated.

This task is divided into subtasks - move PBU in shallow water and taking PBU on shore with a slight slope.

Figure 1 shows the process of moving PBU, shallow;

Figure 2 shows the process of setting the anchor cords on solid ground;

Figure 3 shows the process of pulling out PBU on shore with a slight slope.

The concept of moving PBU, shallow is as follows (Fig.1):

with the traction winch 1 PBU at TSIT served traction cable 2 by means of a winch with a cable conductor 3 and secured on the deck TSVP;

- TSIT attached to the deck by the end of the pull rope 2 goes to the place of registration of the anchor;

in place of setting anchors the rope 2 is fixed to an anchor "Delta" 6;

- using double-drum winch 4 and the U-shaped frame 5 anchor 6, with a fixed cable 2, is installed on the ground;

- place performances marked by buoys 7;

next PBU, choosing two winches 1, extends for traction ropes to the place of registration of the anchors 6.

- TSIT their means selects the armature 6 to the deck;

- pull rope 2 winches PBU or transferred to PBU, or the cycle repeats.

The principle of setting the anchor cords on solid ground is the following (Figure 2):

- TSIT delivers in place of setting three anchor screw 8, three adjustable thrust 9, boards the Orme with the roller unit 10;

- by using the drilling rig 11 installed on TSIT, are screwed into the ground three anchors 8;

next ground freight tools TSIT ground mounted platform with a roller unit 10;

- using the adjustable rod 9, the platform 10 is connected with screw anchors 8;

after setting anchor ligament posted traction rope with a PBU to the roller unit of the platform 10.

The principle of pulling out PBU to the shore with a slight skew is as follows (Fig.3):

traction rope 2 winch 1 PBU is conducted through the power rollers of the platform 10, the anchor cords and the roller unit 12 PBU, thus forming the variable geometry mechanism;

- stretching on the ropes 2 with a traction winch 1, PBU comes ashore;

- at the end of the cycle PBU traction rope 2 leaves the platform 10 and thrust 9 understand, anchors 8 gets out of the soil using a drilling rig 11 and loaded aboard a means TSVP;

- if necessary, the cycle is repeated.

The way to move a floating drilling rig by means of complex transport hovercraft, which includes moving in shallow water and lifting floating drilling rig on the air cushion on the shore at a slight angle, characterized in that to move through the shallow water, where it is impossible to use the conventional boats for towing, used anchor Delta, installed on the ground using equipment transport hovercraft, joined by a traction rope winches installed on a floating drilling rig, and which provide rough at anchor, the method differs in that the output of the floating drilling on shore with a slight skew is used to bond the three screw anchors, screw in the soil through the drilling rig placed on the deck of the transport vessel, hovercraft, combined with a platform with a block of rollers adjustable rods, floating drilling for landfall used traction winches and blocks of rollers, the roller unit on the platform anchor cords and floating drilling together with traction winch form the variable geometry mechanism that allows for pulling the floating drilling at anchor winch with less traction.



 

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FIELD: transport.

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FIELD: transport.

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EFFECT: increased displacement and tonnage at unchanged overall dimensions.

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FIELD: transport.

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EFFECT: higher reliability, expanded operating performances.

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