CN218150796U

CN218150796U - Riser mounting structure convenient to install-dismantle fast

Info

Publication number: CN218150796U
Application number: CN202221695246.1U
Authority: CN
Inventors: 杨兵; 李涪芳; 刘宽
Original assignee: Sichuan Ruidu Petroleum Engineering Technology Service Co ltd
Current assignee: Sichuan Ruidu Petroleum Engineering Technology Service Co ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-12-27
Anticipated expiration: 2032-06-30

Abstract

The utility model relates to a riser installation structure convenient for quick installation and disassembly, which comprises a riser and a rigid pipe, wherein the rigid pipe is arranged around the riser through a chuck; the upper end and the lower end of the marine riser are respectively provided with a joint A and a joint B; the joint B is provided with a movable block in a penetrating way along the radial direction, and the external thread of the joint B is sleeved with a collar piece; the collar piece is contacted with the movable block through an inclined plane; the outer wall of the joint A is provided with a concave groove; when adjacent marine risers are butted, the marine riser is inserted into the joint B through the corresponding joint A, and the sleeve ring piece is rotated to apply radial force to the movable block, so that the movable block is inserted into the sunken groove. The utility model discloses the beneficial effect who reaches is: firm connection, no deformation, repeated utilization, good sealing effect and contribution to pressurizing drilling fluid.

Description

Riser mounting structure convenient to install-dismantle fast

Technical Field

The utility model relates to an oil drilling equipment technical field, especially a riser mounting structure convenient to quick installation-dismantlement.

Background

In deep water drilling, a plurality of sections of marine riser pipes are connected by chucks. The existing chucks have various forms, but still have a plurality of manual connection modes which influence the connection efficiency.

At present, some chuck structures capable of automatic connection by mechanical equipment, such as the riser chuck of GE, are gradually emerging. However, most of them are connected by tightening a plurality of petal structures through a threaded ring; this kind of connected mode lets lamella structure department lose elasticity vigor very easily to make the diameter diminish, be unfavorable for the butt joint installation of follow-up marine riser when maintaining.

Based on this, this company designs a marine riser mounting structure, does benefit to dismantlement and installation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome prior art's shortcoming, provide a marine riser mounting structure convenient to install fast-dismantle, it has connect firm, can not take place to warp, can use many times, sealed effectual, do benefit to the pressurized beneficial effect of drilling fluid.

The purpose of the utility model is realized through the following technical scheme: a riser installation structure convenient for quick installation-disassembly comprises a riser and a rigid pipe, wherein the rigid pipe is arranged around the riser through a chuck;

the upper end and the lower end of the riser are respectively provided with a joint A and a joint B;

the joint B is provided with a movable block in a penetrating way along the radial direction, and a sleeve ring piece is sleeved on the outer thread of the joint B; the collar piece is contacted with the movable block through an inclined plane;

the outer wall of the joint A is provided with a concave groove;

when adjacent marine risers are in butt joint, the marine riser is inserted into the joint B through the corresponding joint A, and the sleeve ring piece is rotated to apply radial force to the movable block, so that the movable block is inserted into the sunken groove.

Optionally, the outer side surface of the movable block is an inclined surface; the inner wall of the ring sleeve piece is provided with a conical ring groove; the wall of the conical ring groove is attached to the outer side surface of the movable block; when the ring sleeve is rotated, the wall of the conical ring groove applies a radial force to the movable block.

Furthermore, the conical ring groove is small at the top and big at the bottom; when the rotating ring sleeve moves downwards, radial force is applied to the movable block.

Optionally, the lower part of the ring sleeve is circumferentially provided with a plurality of notches; the outer cylindrical surface of the joint B is provided with a limiting pin; the limiting pin is provided with a limiting block, and one part of the limiting block is positioned at the notch, so that the ring set is limited.

Furthermore, the ring sleeve piece is provided with an annular hole for communicating the gap; telescopic pins are arranged on two sides of the limiting block and inserted into the corresponding annular holes;

the telescopic pin is provided with a shifting part, and the telescopic action of the telescopic pin is realized by applying force to the shifting part.

Optionally, the two ends of the rigid pipe are provided with a joint C and a joint D; the joint C is cylindrical, the lower end of the joint C is provided with an expanding opening, and the joint C and the rigid pipe are coaxially arranged; the joint D is communicated with the upper end of the rigid pipe into a whole, and a flexible sealing element is arranged on the inner wall of the joint D;

when the connected rigid pipes are butted, the corresponding joints C can deform the flexible sealing element and enable the flexible sealing element to be attached to the outer cylindrical surface of the lower end of the rigid pipe.

Furthermore, the flexible sealing element is in an elliptical annular sealing ring shape; the joint D comprises an upper part of the joint D and a lower part of the joint D;

the outer sides of the upper part of the joint D and the lower part of the joint D are connected into a whole through two arc-shaped plates, and the upper part and the lower part of the joint D are arranged at intervals to form a placing cavity; the flexible sealing element is arranged in the placing cavity close to the gradual part of the rigid pipe, and a plurality of piston elements are arranged in the placing cavity; one end of the piston piece is abutted against the flexible sealing piece, the other end of the piston piece penetrates through the arc-shaped plate, and the end is provided with an inclined surface;

when the joint C is butted with the joint D, the flaring wall of the joint C is contacted with the inclined surface of the piston piece, so that the piston piece acts towards the radial center, and the flexible sealing piece deforms to perform good sealing.

Furthermore, the upper part of the joint D and the lower part of the joint D are provided with arc chamfers at the contact parts with the flexible sealing element.

The main purpose of the riser is to provide water-blocking, and even a small penetration effect is not significant. But for a rigid pipe, which is the channel for the pressurized hydraulic flow path, a good sealing effect is to be ensured.

The conventional connection between rigid pipes is performed by inserting and connecting the rigid pipes along with the connection of the riser, and although the connection can be performed, the sealing effect is not particularly preferable. Therefore, the control of the drilling fluid pressure is not particularly good, and the pressure leakage is easily caused, and the input amount needs to be increased. This insertion of the solution then enables a good sealing.

The utility model has the advantages of it is following:

when the joint A and the joint B are butted, the collar piece is rotated, and the limiting block is placed, so that a good and firm connecting effect can be ensured; compared with the traditional multi-petal hoop, the scheme has the advantages that the deformation is avoided, and the multi-petal hoop can be repeatedly installed and used for many times;

when the joint C is butted with the joint D, the joint A and the joint B can be automatically inserted and sealed when being close to each other; compare in traditional form of only inserting, through interference fit's mode, the sealed effect of this scheme is better, more does benefit to the pressurization of drilling fluid.

Drawings

FIG. 1 is a schematic view of the structure of the riser, the rigid pipe, and the chuck;

FIG. 2 is a schematic view of a plurality of riser connections;

FIG. 3 is a schematic structural view of a displacement block including a horizontal portion B and a vertical portion B;

FIG. 4 is a schematic view of the structure of the riser when docked;

FIG. 5 is a schematic view of the structure of the butt joint of the rigid pipes;

in the figure: 1-riser, 2-rigid pipe, 3-chuck, 4-joint A, 401-sunken hole, 5-joint B, 6-movable block, 7-collar piece, 701-conical ring groove, 702-notch, 703-annular hole, 8-limiting block, 801-telescopic pin, 802-toggle part, 9-joint C, 10-joint D, 11-flexible sealing element, 12-arc plate and 13-piston element.

Detailed Description

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1 and 2, a riser installation structure for facilitating quick installation-disassembly includes a riser section formed by a riser 1, a rigid pipe 2, and a chuck 3; the joints of the marine riser are correspondingly connected in a butt joint mode through the joints A4 at the two ends of the marine riser 1 and the joints B5 at the lower end of the marine riser, and are connected through the joints C9 and the joints D at the two ends of the rigid pipe 2.

It should be noted that, for the riser joint, chucks 3 are provided at both ends of the riser 1, and the plurality of rigid pipes 2 are provided along the circumferential direction of the riser 1 via the chucks 3.

Specifically, the joint B5 is provided with a movable block 6 in a penetrating way along the radial direction, and a collar piece 7 is sleeved on the outer thread of the movable block; the collar piece 7 is contacted with the movable block 6 through an inclined surface. And the outer wall of the joint A4 has a concave groove 401. When adjacent risers 1 are butted, they are inserted into the joint B5 through the corresponding joint A4, and the collar member 7 is rotated to apply a radial force to the movable block 6, so that the movable block 6 is inserted into the recessed groove 401.

In this embodiment, the outer side surface of the movable block 6 is an inclined surface; a conical ring groove 701 is formed in the inner wall of the ring sleeve member 7; the wall of the conical ring groove 701 is attached to the outer side surface of the movable block 6. When the ring set 7 is rotated, the walls of the conical ring groove 701 exert a radial force on the movable mass 6.

Further, the conical ring groove 701 is small at the top and big at the bottom; when the rotating ring set 7 moves downward, a radial force is applied to the movable block 6. This position of the sleeve change 7 is well secured due to the weight of the ring sleeve 7.

Alternatively, as shown in fig. 3, a riser installation structure that facilitates quick installation-removal, and locking of the bundle 7 is also contemplated.

Specifically, the ring sleeve member 7 is circumferentially provided with a plurality of notches 702 at the lower portion thereof; the ring set 7 is further provided with an annular hole 703 communicating the notch 702. And at the outer cylindrical surface of the joint B5, there is a stopper pin 501.

The stopper 8 is mounted on the stopper pin 501, and a part of the stopper 8 is located at the notch 702, thereby stopping the ring set 7. If the sleeve replacing part 7 rotates, the sleeve replacing part is limited and locked by the limiting block 8.

In this embodiment, the two sides of the limiting block 8 are provided with the telescopic pins 801, and the telescopic pins 801 are inserted into the corresponding annular holes 703. This ensures that the stop block 8 does not fall off.

Further, the telescopic pin 801 has a toggle portion 802, and by applying a force to the toggle portion 802, the telescopic action of the telescopic pin 801 is realized. When the telescopic pin 801 is installed, the limiting block 8 is clamped up through the mechanical claw, the two poking parts 801 are poked towards the center through the poking arm, and then the telescopic pin 801 retracts; when the stopper 8 is threaded on the stopper pin 501, the toggle arm is then released, allowing the telescopic pin 801 to be inserted into the annular hole 703.

Alternatively, as shown in fig. 4 and 5, a riser installation structure that facilitates quick installation-disassembly is designed to improve the sealing effect by further butting the rigid pipe 2.

Specifically, the rigid tube 2 has a joint C9 and a joint D10 at both ends. The joint C9 is cylindrical, is disposed coaxially with the rigid pipe 2, has a larger diameter than the rigid pipe 2, and has a flared lower end inner wall. And the joint D10 is integrally communicated with the upper end of the rigid pipe 2, and has a flexible sealing member 11 at the inner wall thereof.

When the connected rigid pipes 2 are butted, the joint D10 is inserted into the joint C9, and meanwhile, the joint C9 can deform the flexible sealing element 11, so that the flexible sealing element 11 is attached to the outer cylindrical surface of the lower end of the rigid pipe 2, and sealing is realized.

In this embodiment, connect D10 including connecting D upper portion, connecting D lower part, connect D upper portion moreover and connect D lower part, both outsides department links into an integrated entity through two arcs 12, and both interval settings form and place the chamber. Wherein, a flexible sealing element 11 is arranged in the placing cavity close to the gradual part of the rigid pipe 2, and a plurality of piston elements 13 are arranged in the placing cavity; the piston member 13 has one end abutting on the flexible sealing member 11 and the other end penetrating through the arc-shaped plate 13 and having an inclined surface.

When the joint C9 and the joint D10 are butted against each other, the flared wall of the joint C9 contacts the inclined surface of the piston member 13, so that the piston member 13 is moved toward the radial center, and the flexible seal member 11 is deformed to perform good sealing.

Preferably, the flexible seal 11 is in the form of an elliptical annular seal ring. Preferably, the upper part of the joint D and the lower part of the joint D are provided with arc-shaped chamfers at the contact parts with the flexible sealing member 11. Can ensure good sealing effect.

The above embodiments only represent preferred embodiments, and the description is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention.

Claims

1. The utility model provides a riser mounting structure convenient to install fast-dismantle, includes riser (1), rigid tube (2), and rigid tube (2) set up around riser (1) through chuck (3), its characterized in that:

the upper end and the lower end of the marine riser (1) are respectively provided with a joint A (4) and a joint B (5);

the joint B (5) is provided with a movable block (6) in a penetrating manner along the radial direction, and a ring sleeve member (7) is sleeved on the external thread of the joint B; the ring sleeve (7) is contacted with the movable block (6) through an inclined surface;

the joint A (4) is provided with a concave groove (401) on the outer wall;

when adjacent marine risers (1) are butted, the marine risers are inserted into the joint B (5) through the corresponding joint A (4), and the rotating ring sleeve (7) exerts radial force on the movable block (6) to enable the movable block (6) to be inserted into the concave groove (401).

2. The riser mounting structure facilitating quick install-uninstall of claim 1, wherein: the outer side surface of the movable block (6) is an inclined surface;

the inner wall of the ring sleeve piece (7) is provided with a conical ring groove (701); the wall of the conical ring groove (701) is attached to the outer side surface of the movable block (6);

when the ring sleeve (7) is rotated, the wall of the conical ring groove (701) exerts a radial force on the movable block (6).

3. A riser installation structure facilitating quick install-uninstall according to claim 2, wherein: the conical ring groove (701) is small in upper part and large in lower part;

when the rotating ring sleeve (7) moves downwards, radial force is applied to the movable block (6).

4. The riser mounting structure facilitating quick install-uninstall of claim 1, wherein: the lower part of the ring sleeve piece (7) is circumferentially provided with a plurality of notches (702);

the outer cylindrical surface of the joint B (5) is provided with a limiting pin (501);

the limiting pin (501) is provided with a limiting block (8), and one part of the limiting block (8) is located at the notch, so that the ring set (7) is limited.

5. The riser mounting structure facilitating quick install-detach according to claim 4, wherein: the ring sleeve piece (7) is provided with an annular hole (703) for communicating the notch (702);

telescopic pins (801) are arranged on two sides of the limiting block (8), and the telescopic pins (801) are inserted into the corresponding annular holes (703);

the telescopic pin (801) is provided with a toggle part (802), and the telescopic action of the telescopic pin (801) is realized by applying force to the toggle part (802).

6. The riser mounting structure facilitating quick install-uninstall of claim 1, wherein: the two ends of the rigid pipe (2) are provided with a joint C (9) and a joint D (10);

the joint C (9) is cylindrical, has a flaring at the lower end and is coaxially arranged with the rigid pipe (2);

the joint D (10) is communicated with the upper end of the rigid pipe (2) into a whole, and a flexible sealing piece (11) is arranged on the inner wall of the joint D;

when the connected rigid pipes (2) are in butt joint, the corresponding joints C (9) can deform the flexible sealing elements (11) to enable the flexible sealing elements (11) to be attached to the outer cylindrical surface of the lower end of each rigid pipe (2).

7. The riser mounting structure facilitating quick install-detach according to claim 6, wherein: the flexible sealing element (11) is in an elliptical annular sealing ring shape;

the joint D (10) comprises an upper part of the joint D and a lower part of the joint D;

the outer sides of the upper part of the joint D and the lower part of the joint D are connected into a whole through two arc-shaped plates (12), and the upper part and the lower part of the joint D are arranged at intervals to form a placing cavity;

the flexible sealing element (11) is gradually arranged in the placing cavity close to the rigid pipe (2), and a plurality of piston elements (13) are arranged in the placing cavity;

the piston piece (13) is abutted against the flexible sealing piece (11) at one end, and penetrates through the arc-shaped plate (12) at the other end and is provided with an inclined surface;

when the joint C (9) is butted with the joint D (10), the flaring wall of the joint C (9) is contacted with the inclined surface of the piston piece (13), so that the piston piece (13) moves towards the radial center, and the flexible sealing piece (11) deforms to perform good sealing.

8. The riser mounting structure facilitating quick install-uninstall of claim 7, wherein: and the upper part of the joint D and the lower part of the joint D are provided with arc chamfers at the contact parts with the flexible sealing element (11).