Multifunctional auxiliary frame suitable for mounting PLET on broadside

Abstract

The utility model relates to the technical field, in particular to a multifunctional auxiliary frame suitable for mounting a PLET on a broadside, which is characterized in that universal supporting seats are respectively arranged at the front and back of the bottom of the left side of a suspension frame; the pin shaft supporting seats are respectively arranged in front and back of the middle bottom of the suspension frame; the square sockets are arranged on the right portion of the upper surface of the suspension frame in a pairwise mode. The block pins are respectively inserted into the corresponding square sockets; the safety of the subsea pipeline is better guaranteed; for a large-size PLET, the frame can be removed, and installation of the large-size PLET is not affected. The problems of connection and rapid tripping of the PLET and the PLS are solved; and when the alignment distance is not appropriate, the PLS can be adjusted to the horizontal position and the hanging point position again, smooth alignment welding is achieved, and therefore the risk of abandoning pipes or cutting openings again is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field, and in particular to a multifunctional auxiliary frame suitable for installing PLET on the side of a ship. Background Art

[0002] In the development of deepwater oil and gas fields, after the laying of the sea pipe is completed, a PLET (submarine pipeline terminal) is usually installed on the pipe end to connect other underwater facilities. Large-sized PLET must be installed through the PLS (side lowering system). The sea pipe is recovered to the side system, the hanging flange is placed in the hanging fixture, the head is cut and removed, the PLS system is placed horizontally, the PLET is placed on the PLS system, the PLS is flipped to the designed angle, and the PLET and the sea pipe are welded together through the hydraulic system. The PLET is separated from the PLS and gradually lowered to the designed position on the seabed.

[0003] The following risks exist in the installation process of existing technologies:

[0004] (1) Due to the large gap between the A / R cable axis and the PLS hanging point, there is no transitional matching between the PLET and the PLS, and the size of the PLET needs to be increased, which increases the difficulty of transportation. During the lowering process, the bending moment of the submarine pipeline is too large, and the buckling risk increases;

[0005] (2) After welding, the PLET is in a suspended state, and the upper hanging point needs to bear most of the force. Given the structural form of the original hook of the PLS, it may be impossible to unhook during the unhooking stage;

[0006] (3) The tail pipe length and collar pipe length reserved on the PLT are determined in the design stage, but errors may occur during the actual construction process, and the adjustment distance of the PLS itself is limited, which may cause major accidents where welding cannot be performed. Utility Model Content

[0007] The purpose of the utility model is to propose a multifunctional auxiliary frame suitable for installing PLET on the side of the ship to solve the above problems in view of the defects and shortcomings of the prior art.

[0008] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: it comprises a suspension frame;

[0009] It also contains:

[0010] Universal support bases, the number of which is two and which are respectively arranged at the front and rear of the left bottom of the suspension frame;

[0011] Pin support seats, the number of which is two and which are respectively arranged at the front and rear of the middle bottom of the suspension frame;

[0012] Square sockets, the number of which is eight, and which are arranged in pairs on the right side of the upper surface of the suspension frame;

[0013] Block pins, the number of which is several and which are respectively inserted into corresponding square sockets.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a multifunctional auxiliary frame suitable for installing PLET on the side, which better guarantees the safety of the subsea pipeline; for large-size PLET, this frame can be removed without affecting its installation; the problem of connection and quick release between PLET and PLS is solved; when the mating distance is not suitable, the PLS can be readjusted to a horizontal position and to the hanging point position to achieve smooth mating welding, thereby avoiding the risk of re-abandoning the pipe or cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Description of reference numerals:

[0018] Suspension frame 1, universal support seat 2, pin shaft support seat 3, square socket 4, block pin 5. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] See also Figure 1 , which comprises a suspension frame 1;

[0021] It also contains:

[0022] Universal support base 2, the number of the universal support base 2 is two, and they are respectively arranged at the front and rear of the left bottom of the suspension frame 1;

[0023] A pin support seat 3, wherein the number of the pin support seats 3 is two and they are respectively arranged at the front and rear of the middle bottom of the suspension frame 1;

[0024] Square sockets 4, the number of the square sockets 4 is eight, and two of them are arranged on the right side of the upper surface of the suspension frame 1, front, back, left, and right;

[0025] Block pins 5, the number of the block pins 5 is several, and they are respectively inserted into the corresponding square sockets 4.

[0026] The working principle of this specific embodiment: the multifunctional auxiliary frame is connected to the PHS through two universal support seats 2 and two bayonet support seats; four pairs of square sockets 4 are provided on the suspension frame 1, and the block pins 5 are inserted into the square sockets 4 to fix the position of the PLET. The square sockets 4 at any position can be selected for use according to the structural form of the PLET.

[0027] After adopting the above structure, the beneficial effects of this specific implementation are:

[0028] 1. Solved the gap problem between PLET and PLS; after adding the newly designed adapter, with hanging points of different heights, it can provide stable and reliable hanging points for PLETs of various sizes. For small-sized PLETs, it greatly reduces the weight, reduces the design of the PLET body, reduces the difficulties in the transportation process, and also reduces the bending moment caused by the PLET lowering process on the subsea pipeline, which provides better protection for the safety of the subsea pipeline; for large-sized PLETs, this frame can be removed without affecting its installation;

[0029] 2. Solved the problem of connection and quick release between PLET and PLS; after the welding of PLET and sea pipe is completed, tension conversion is required to convert the tension on the hanging clip to the A&R cable. Since there is no constraint on the upper part of the hanging point of the multifunctional auxiliary frame, PLS can quickly convert the tension on PLS to the A&R cable by lifting the A&R cable, thereby realizing the lowering and installation of PLET.

[0030] 3. It solves the risk of failure to align due to errors in PLET size or Collar tube length; the adapter is designed with multiple hanging point bolt holes. When the matching distance is not suitable, the PLS can be readjusted to the horizontal and hanging point position to achieve smooth matching welding, thus avoiding the risk of re-abandoning the pipe or cutting.

[0031] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A multifunctional auxiliary frame suitable for side-mounting a PLET, comprising a suspension frame (1); It is characterized in that It also contains: Universal support seats (2), the number of the universal support seats (2) being two, and being respectively arranged at the front and rear of the left bottom of the suspension frame (1); A pin support seat (3), wherein the number of the pin support seats (3) is two and they are respectively arranged at the front and rear of the middle bottom of the suspension frame (1); Square sockets (4), the number of the square sockets (4) is eight, and they are arranged in pairs at the front, back, left, and right sides of the upper surface of the suspension frame (1); Block pins (5), the number of the block pins (5) is several, and they are respectively inserted into corresponding square sockets (4).

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