SU1451256A1 - Jack-up floating offshore drilling rig - Google Patents

Abstract

The invention relates to the mining industry and is intended for drilling wells. The goal is to increase the transportability of the installation and the safety of working conditions in it by reducing the time for the descent of the installation to

Description

1451256

water and departure from the scene of the accident in the event of an open fountain. The installation includes a body I in the form of a pontoon with supports 2 having a mechanism 3 for their vertical movement. Portal 4 with a derrick 5 is located on housing 1. Under portal 4, a preventer platform 6 is installed with a plate 7 for fixing a water separation column 8. Plate 7 is placed coaxially with respect to platform 6 and is made of two parts with semicircular articulations cutouts for the coverage of the column 8. One of the parts is rigidly connected to the plane: by the clamp 6. The other part is installed with the possibility of rotation in the horizontal plane relative to it. When the mechanism 3 is turned on, body 1 along supports 2 rises up until noKai, the top of the column comes out of portal 4, after which portal 4 with the tower moves towards the nose of the installation. Then, with the help of mechanism 3, body 1 is launched into the water and afloat, supports 2 are raised up and the tug takes the installation away from the drilling point. 2 Il.

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The invention relates to the mining industry, namely to the drilling of wells with an underwater location. Ust from floating drilling rigs.

(PBU).

The purpose of the invention is to increase the transportability of the installation, and also the safety of working conditions on it by reducing the time of launching the installation and leaving the accident site when an open fountain occurs.

Figure 1 shows a self-lifting PBU from the stern, a general view; Fig. 2 shows a preventive platform with a plate for fastening a water separation column, top view.

Self-lifting PBU consists of a casing 1, made in the form of a pontoon, supports 2, installed with the possibility of their vertical movement relative to the housing 1, mechanisms 3 of the drive for moving the supports 2, portal 4 with a drilling rim 5, console located relative to the housing 1 of the preventive platform 6 with a plate 7 for fastening the water separation column 8, inside which there is a drill string with preventers fixed on it 9.

Plate 7 is also placed cantilever relative to the preventer platform 6 and consists of two parts 10 and 11, one of which 10 is fixedly attached to the preventer platform 6, and the second 1I is connected to the first 10 hinge 12 and the latch 13, the cable

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from which (not shown) is placed in a convenient place for remote maintenance on the deck of the hull 1. The hinge 12 allows the movable part 11

Alit -7 rotates horizontally.

The water separation column 8 is passed through a hole in the plate 7 formed by two semicircular symmetrical cutouts in parts 10 and 11, and

centered with adjustable

 stops 14.

(The preventive platform 6 is mounted on the guides 15 with the possibility of moving relative to the hull 1 and secured against movement by ropes 16, the ends of which are led to the hull 1 through the rollers 17 and fixed there. 0 In the case of an open fountain, must, in the shortest possible time, leave the point of drilling, act on its release from the water-producing column 8; 5 s. as follows.

If the upper end of the drill string with preventers 9 is below the portal 4, then the portal 4 with the drilling rig 5 moves to the traveling 30 position, i.e. from the stern to the bow of the PBU. Then the drive mechanisms 3 are turned on and the housing 1 descends along the supports 2. down and afloat. The latch 13 is turned off (for example, pulled out of the hole) by

cable. In this case, the movable part P of the plate 7 gets the opportunity to rotate in the horizontal plane on the hinge 12 relative to the fixed part 10 of the plate 7. When the supports 2 are lifted up above the body 1, which is already afloat, the tug pulls the BIP forward with the bow from the drilling point. The remaining water separation column 8 presses the movable part I1 of the plate 7 and causes it to turn on the hinge 12, thereby releasing the PBU from communication with the water separation column 8.

If the upper end of the drill string with preventers 9 is inside the gantry 4, then the retainer 13 is disconnected with the help of a cable. Then, the cables 16 are wound up with a winch, which cause the preventive platform 6 to move along the guides 15 towards the nose of the BSP. The water separation column 8, which remains in place, presses the movable part 11 of the plate 7 and causes it to turn on the hinge 12.

At the same time, a covering water separating column 8 is opened, an annular cut-out in the plate 7, which loses connection with the water separating column 8. Further, the drive mechanisms 3 are turned on and the housing 1 is raised upwards by the supports 2 until the top of the drill string exits portal A, after which portal 4 with the derrick 5 moves to the side of the PBU, i.e. in a hiking position. Then, using the drive mechanisms 3, the housing 1 is lowered into the water and is afloat, the supports 2 are raised upwards and the tug takes the PBU away from the drilling point.

Claims (1)

Invention Formula A self-lifting floating drilling unit, comprising a pontoon hull with supports having a mechanism for their vertical movement, a portal with a derrick mounted on the hull and a preventive platform installed under the gantry with a separating plate of the sump that is To ensure the transportability of the installation and the safety of working conditions on it by reducing the time of the launch of the installation on the water and leaving the accident site when an open fountain occurs, the plate for fixing the water-separating column is offset from the console against the preventive platform and is made of two parts hinged between themselves with semicircular cuts to cover the drainage column, while one of the plate parts is rigidly connected to the preventer platform, and the other is mounted with the possibility of rotation in the horizontal plane relative to her And I1. Ya1 W 41 i -13 8 15 / IT .one