SU1444500A1 - Arrangement for joining floating drilling rig to underwater hole mouth - Google Patents

Abstract

The invention relates to equipment for drilling from floating drilling rigs, and allows increasing the reliability of the next by automatically disconnecting the seabed (MS) with a maximum deviation

Description

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1ko mecca topa (K). The device includes an MC, a block of preventers, an angular deviation located above it, and a means for emergency separation of the MC. At the same time, K contains a lower flange with a pair of lower lugs 7, an upper flange with a pair of upper lugs and a hollow spherical body with four pairs of trunnions 11. The latter are located in the corresponding pairs of universal joint lugs. The means for emergency uncoupling of the MC contain a lower body and an upper body connected to each other by means of locking cams and connected to the MC and K. On the lower body there is a locking arm with a hydraulic axial movement. The latter has at least two sensors of maximum deviation K, made in the form of a hydra

35 gates with chup- nel element 36 mounted on the eyes of each pair of hinge, and double-arm levers 37 hinged on the eye 7 axes 38 and 39. Some KON1Sh1 arms 37 pivotally hinged with hinge 11 of body K, free the ends 43, 44 interact with the GR 35. In case of emergency demolition, the installation K rotates in the direction of deviation of the MS, while the trunnions 11 rotate relative to the lugs 7 and the levers 37 rotate on axes 38 and 39. With the maximum angle of rotation, the ends 43, 44 of the levers 37 impact PA element 36 GR 35, pr this under Procedure fluid pressure rises ferrule, locking cams exit the grooves and the housing va sredst for maintaining separation emergency MS

are disconnected. 2 hp f-ly, 8 ill.

one

The invention relates to the field of drilling from floating drilling rigs, in particular to the construction of marine debris connecting the BSP with the subsea wellhead. I

The aim of the invention is to improve the reliability of the floating drilling rig PBU by automatically unloading the seawater at the maximum otkponeniya compensator.

FIG. 1 shows a PBU with a seabed, general view; FIG. 2 shows an angular compensator Assembly; FIG. FIG. 3 shows an emergency disconnection unit; Fig. 4 is a sectional view of the emergency disconnection assembly along the locking cams; in FIG. 3, view A in FIG. 2 (limit angle sensor); figure 6 - section bb in figure 5 (adjustable ti gi); in fig. 7 - section bb In figure 5 (two shoulders levers); on Fig - section GG on fig.Z.

The device for connecting the floating drilling rig (FIG. 1) to the mouth of the subsea well includes a marine one hundred to two, a block of 3 preventers located above its angle compensator 4 and means 5 for emergency disconnection of stand 2..

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five

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The angular compensator 4 (FIG. 2) contains neither a blue flange 6 with a pair of lower ribs 7, an upper flange 8 with a pair of identical upper lugs 9, and a spherical hollow: body 10 with four mutually perpendicular pairs of pins 11 and 12 located in corresponding mutually ne papandicular pairs of openings 7 and 9 of the universal joint. A transition nozzle 13 is installed above the upper flange to connect the angler of the compensator to the seabed, and the upper flange is provided with a stop ring 14 to limit the limiting angle of rotation of the hinge.

The means 5 for emergency uncoupling the stand 2 (FIG. 3) comprises an upper case 15, which is connected via a lock 16 to a stand 2, and a lower case 17, which is similarly connected with a lock 16 to a branch pipe 13 of an angular compensator 4. Upper and lower cases 15 and 17 (FIG. 4) are interconnected by locking cams 18 installed in annular grooves 19.

The locking collar 20 has a lower part mounted on the lower housing 17 and forms a control cavity 21, to

which through dripped 22 l pipeline

23 pressurized working fluid from pneumoagndum accumulator

24 (figure 2).

The sealing of the ear cavity 21 between the locking collar 20 and the lower body 17 is provided with seals 25 and 26. The upper part of the ferrule 20 is made with through openings and is mounted on the tail portion of the upper body. In the openings of the assembly 20, the screws 27 hang a wedge 28 with the tips of the surface facing towards the cams 18. The screws are screwed into the ring 29 attached by bolts to the end of the yoke.

The locking cams are equipped with a pin 30 with double-sided inclined grooves 31 forming a wedge pair, and the holder for engagement with the latter has a counter surface 32. Pin 30 with its end having an inclined end 33 protrudes through the opening in the shank of the upper body until it comes into contact with the inclined surface of the wedge 28, providing a connection between the two buildings 15 and 17.

During the period of interconnection of the seawall 2 with the angular compensator 4, the holder 20 is connected to the lower body of the means 5 for emergency disengagement of the stand with shear pins 34 (FIG. 3) attached to the holder by means of a bar and a screw.

The hydraulic axial movement of the yoke (Figures 5, 6 and 7) has at least two sensors of the limiting displacement

compensator slopes made in the form of hydraulic distributors 35 with a sensing element 36 mounted on the lugs of each pair of hinge, and two shoulders levers 37 hinged on the lug 7 axes 38 and 39, with one ends of the arms hingedly connected by respectively adjustable straps 40 and 41 with a pin 11 of a spherical body 10 with a common axis 42, and the free Ionians 43 and 44 of the levers have the ability to interact with the valve 35 ,. . .

The device works as follows.

In the event of an accidental demolition of a floating drilling rig from the stand and the corner compensator 4, it turns in the direction of deviation of the seaway, so that the lugs 9 are one piece 4445004

ry hinges turn around pivots -. 12, and the pins 11 with the oval body 10 rotate around the support of the lower lugs 7. Turning the lugs relative to the pins cause the two shoulders 37 to rotate on axes 38 and 39, depending on the direction of rotation. For a given limiting angle of rotation, i.e. when the gap C (Fig. 2) between the eye 7 and the stop ring 1D of the flange 8 reaches a predetermined critical value, the free ends of the double-arm levers act on the sensitive element 36 of the hydraulic distributor 35 (Fig. 5), and the latter communicates the pneumo-hydroelectric accumulator 24 with a cavity 21 of the cage 20. The cage rises up under the action of the pressure of the fluid 0 injected into the cavity 21, while cutting the pins 34.

The wedge 28, lifting together with the yoke, releases 30 locking cams to exit them from the 5th annular groove 19. The jaws exit the grooves simultaneously with the raising of the yoke 20 because the yoke with its inclined surface 32 located in the through openings 0, is in contact with the inclined grooves 31 per pin x 30.

Cases 15 and 17 are separated, and under the action of pressure in cavity 21 and; tension of the seawall of the upper gI of the scientific research institute, hull 15 comes down from the lower hull 17. After disconnecting the seawall, the IVD has the opportunity to proceed with the correction of a malfunction in the positioning system or care 0 to a safe place under adverse hydrometereological conditions.

Claims (1)

Invention Formula 5 1 Device for connecting a floating drilling rig to the mouth of a subsea well, including a marine station with an angular deviation compensator containing a spherical body 0 with trunnions located in the lugs of mutually perpendicular pairs of hinges, means for emergency disengagement of the stand containing the lower and upper bodies connected between sockets by locking cams and connected respectively to the stand and compensator, and mounted on the lower case of means for emergency uncoupling ka locking clip with .i sixteen hch Fiz.Z 1444500 Jd Fy 27 gd 21 AP Phie.in