Protection device for pulling submarine cable to pass through directional drill

Abstract

The utility model discloses a protection device for pulling a submarine cable to pass through a directional drill, which comprises a protection main body fixedly sleeved on the submarine cable, a connecting part and a rolling part are fixedly arranged outside the protection main body, the connecting part is used for connecting a traction steel wire so as to enable the protection main body to be connected with traction equipment, and the rolling part is used for rolling the traction steel wire. At least three rolling parts are evenly arranged in the circumferential direction of the protection body, rolling wheels are rotationally installed at the ends, away from the protection body, of the rolling parts, gaps are formed between the ends, away from the protection body, of the connecting parts and the contact face, and the contact face is defined by every two adjacent rolling wheels and the inner wall of a pipeline of the directional drill. The connecting part is arranged to connect the traction steel wire, traction equipment directly pulls the protection device, then the submarine cable is driven to move, the idler wheels make rolling contact with the inner wall of a pipeline of the directional drill, the traction force generated when the submarine cable is pulled to penetrate through the directional drill is reduced, meanwhile, the submarine cable section exposed out of the protection device can be effectively protected, the sheath of the submarine cable is prevented from being abraded, and the service life of the submarine cable is prolonged. The service life of the submarine cable is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a submarine cable laying auxiliary tool technical field especially relates to a kind of protection devices for pulling submarine cable crossing directional drilling. BACKGROUND

[0002] With the continuous development of offshore wind power and offshore floating photovoltaic power generation, offshore wind farms are completed in the coastal areas of China, but in order to increase the available sea area, the offshore wind farms or floating photovoltaic power plants built at this time are generally far away from the shore, and the submarine cable output route (the path of the submarine cable from the sea to the land) needs to be landed after passing through the sea area. Due to the complex terrain of the landing point or the proximity to the aquaculture area, in order to reduce the difficulty of submarine cable landing and also to protect the aquaculture area, directional drilling is generally used for this section. The directional drilling length is relatively long, and the distance is generally more than 1 km. The cable is connected to the drill rod, and the drill machine pulls it from the target point back to the starting point to complete the laying. During the back-dragging process, the submarine cable may rub against the hole expander or other underground obstacles, causing damage to the outer skin of the submarine cable and affecting its insulation performance and service life. Therefore, a protection device needs to be designed to protect the submarine cable from crossing the directional drilling. SUMMARY

[0003] The utility model aims at the deficiency of prior art and proposes a kind of protection devices for pulling submarine cable crossing directional drilling, which can reduce the pulling force when pulling submarine cable crossing directional drilling, prevent the abrasion of the outer skin of submarine cable and prolong the service life of submarine cable.

[0004] The technical scheme for achieving the utility model is as follows:

[0005] A protection device for pulling submarine cable crossing directional drilling includes a protection body fixedly sleeved on the submarine cable. A connecting part and a rolling part are fixed to the outside of the protection body. The connecting part is used to connect the traction wire to connect the protection body with the traction equipment. The rolling part is evenly provided with at least three rolling wheels at the end away from the protection body. A gap is provided between the end of the connecting part away from the protection body and the contact surface. The contact surface is the surface surrounded by the adjacent two rolling wheels and the inner wall of the pipe of the directional drilling.

[0006] Further, the protection body is composed of two oppositely arranged clamps with semicircular cross sections. The two clamps are connected in an openable and closable manner.

[0007] Further, the two clamps are detachably connected by bolts on both sides.

[0008] Further, one side of the two clamps is detachably connected by a bolt, and the other side is rotatably connected by a pin shaft.

[0009] Furthermore, the inner wall of the protective body is provided with a cushioning pad.

[0010] Furthermore, the connecting part includes a pulling part and a support part welded between the pulling part and the protective body. The pulling part is provided with a pulling hole through it, and the axis of the pulling hole is parallel to the axis of the protective body.

[0011] Furthermore, the rolling part is centrally located on the protective body along the axial direction.

[0012] Furthermore, the rolling part includes symmetrically and inclined brackets, the bottom of which is welded and fixed to the protective body, and the top of which is close to each other and welded with a rotating seat, and the roller is rotatably mounted on the rotating seat.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects:

[0014] (1) This utility model connects the protective body to the submarine cable and connects the traction steel wire by setting the connecting part, thereby connecting to the external traction equipment (such as drilling rigs and winches). When in use, multiple protective devices are set at intervals on the outside of the submarine cable. The traction equipment directly pulls the multiple protective devices to move, thereby driving the submarine cable to move. At the same time, the rollers roll into contact with the inner wall of the directional drilling pipe, which reduces friction and thus reduces the pulling force when pulling the submarine cable through the directional drilling. On the other hand, it can effectively protect the submarine cable section exposed outside the protective device, prevent the outer sheath of the submarine cable from being worn, and extend the service life of the submarine cable.

[0015] (2) The main body of this utility model is composed of two clamps, which are easy to install on the outside of the submarine cable and provide two different connection structures. When the structure with bolts on both sides is adopted, it is a completely split structure design, which is easy to process and manufacture. When the structure with one side hinged and the other side bolted is adopted, the installation time on the construction site is reduced and it is more convenient to use.

[0016] (3) By setting a buffer pad, this utility model can play a certain buffering role when the main body is pressed tightly against the outer sheath of the submarine cable, thus avoiding crushing.

[0017] (4) The connecting part of this utility model consists of a pulling part with a pulling hole and a supporting part. While ensuring the connection strength, it reduces the welding area between the pulling part and the protective body, which is convenient for manufacturing. At the same time, the pulling hole is set along the axial direction. The wire clamp passes through the pulling and the wire rope for tightening and fixing. The wire rope clamp is equipped with a fastening bolt to prevent the pulling wire rope from sliding with the pulling hole, thereby ensuring the transmission of the pulling force. The pulling force can be extended to each pulling equipment point for long distances, ensuring uniform force distribution.

[0018] (5) The rolling part of this utility model is centrally located on the protective body along the axial direction, so that the forces on both sides are balanced and the submarine cable can be supported more stably during use.

[0019] (6) This utility model uses two symmetrically arranged supports to form a triangular area, which has strong load-bearing capacity, is not easily deformed, forms effective support, and extends service life. Attached Figure Description

[0020] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0021] Figure 1 This is a simplified structural diagram of Example 1;

[0022] Figure 2 This is a simplified structural diagram of Example 2;

[0023] Figure 3 This is a side view of Example 2;

[0024] Figure 4 This is a top view of Example 2;

[0025] Figure 5 This is a simplified structural diagram of Example 3.

[0026] The labels in the attached diagram are:

[0027] Protective body 1, clamp 1-1, connecting part 2, pulling part 2-1, supporting part 2-2, rolling part 3, roller 3-1, bracket 3-2, rotating seat 3-3. Detailed Implementation

[0028] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0029] (Example 1)

[0030] like Figure 1The protective device shown includes a protective body 1 fixedly sleeved on the submarine cable. A connecting part 2 and a rolling part 3 are fixedly mounted on the outside of the protective body 1. The connecting part 2 is used to connect the traction steel wire, thereby connecting the protective body 1 to external traction equipment. In use, multiple protective devices are spaced apart on the outside of the submarine cable. The traction equipment directly pulls the multiple protective devices, thereby moving the submarine cable. At least three rolling parts 3 are evenly distributed along the circumference of the protective body, and a roller 3-1 is rotatably mounted at the end furthest from the protective body 1. A gap is provided between the end of the connecting part 2 furthest from the protective body and the contact surface. The contact surface is the surface formed by two adjacent rollers 3-1 and the inner wall of the directional drilling pipe. Based on the dimensions of the inner wall of the pipe, a suitable height difference between the traction part and the rolling part is selected to ensure that the roller 3-1 always preferentially contacts the inner wall of the pipe during the traction process.

[0031] Specifically, the protective body 1 consists of two opposing clamps 1-1, each with a semi-circular cross-section. Both clamps 1-1 are detachably connected on both sides by bolts, making it a completely split structure design, which facilitates processing, manufacturing, and installation on the outside of the submarine cable. The inner wall of the protective body 1 is equipped with a buffer pad, which provides a certain buffering effect when the protective body 1 presses tightly against the outer sheath of the submarine cable, preventing the outer sheath from being crushed.

[0032] The connecting part 2 includes a pulling part 2-1 and a supporting part 2-2 that is fixedly connected to the pulling part 2-1 and the protective body 1 by welding. The pulling part 2-1 has a through-hole, and the axis of the pulling hole is parallel to the axis of the protective body. By setting the supporting part 2-2, the welding area between the pulling part and the protective body can be reduced while ensuring the connection strength, which facilitates manufacturing.

[0033] The rolling part 3 is centrally positioned on the protective body 1 along the axial direction, ensuring balanced force on both sides and providing more stable support for the submarine cable during use. In this embodiment, three rolling parts 3 are provided circumferentially. Each rolling part 3 includes symmetrically and obliquely arranged brackets 3-2. The bottom of the brackets 3-2 is welded and fixed to the protective body, and the tops are close together and welded with rotating seats 3-3. Rollers 3-1 are rotatably mounted on the rotating seats 3-3. The triangular area formed by two symmetrically arranged brackets provides strong load-bearing capacity, is not easily deformed, provides effective support, and extends service life.

[0034] (Example 2)

[0035] The structure of this embodiment is similar to that of embodiment 1, the difference being as follows: Figures 2 to 4 As shown, in this embodiment, four rolling parts 3 are evenly arranged in the circumferential direction, which can be applied to some construction sites where the distance between the pipe wall and the outer sheath of the submarine cable is small, and the application scenarios are wider.

[0036] How to use this embodiment:

[0037] Prepare several paired semi-circular clamps 1-1. After the directional drilling is completed, when the submarine cable is pulled through, install clamps 1-1 evenly on the submarine cable at intervals to provide support and guidance. Fix the pulling steel wire rope on one side of the semi-cylindrical clamp through the traction hole to provide pulling force.

[0038] The winch is activated, pulling the steel wire and actuating the cable protection device. Guided by the device, the cable slowly passes through the directional drilling pipe. During this slow traction, the cable, protected by the device, avoids external friction damage and damage from excessive localized traction force, thus ensuring its successful passage through the long directional drilling pipe. This solves the problems of excessive localized force and friction on the cable.

[0039] (Example 3)

[0040] The structure of this embodiment is similar to that of embodiment 2, the difference being as follows: Figure 5 As shown, one side of the two clamps 1-1 is detachably fixed by bolts, and the other side is rotatably connected by pins, so that the two halves of the clamps are pre-assembled together, reducing the installation time on the construction site and making them more convenient to use.

[0041] This utility model connects the protective body to the submarine cable and connects the traction steel wire through a connecting part, thereby connecting to external traction equipment (such as drilling rigs and winches). In use, multiple protective devices are set at intervals on the outside of the submarine cable. The traction equipment directly pulls the multiple protective devices to move, thereby driving the submarine cable to move. At the same time, the rollers roll into contact with the inner wall of the directional drilling pipe, which reduces friction and thus reduces the pulling force when pulling the submarine cable through the directional drilling. On the other hand, it can effectively protect the submarine cable section exposed outside the protective devices, prevent wear on the submarine cable sheath, and extend the service life of the submarine cable.

[0042] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective device for pulling submarine cables through directional drilling, characterized in that: The device includes a protective body fixedly mounted on a submarine cable. The protective body is externally fitted with a connecting part and a rolling part. The connecting part is used to connect a traction steel wire so that the protective body is connected to a traction device. At least three rolling parts are evenly distributed along the circumference of the protective body, and a roller is rotatably installed at the end away from the protective body. There is a gap between the end of the connecting part away from the protective body and the contact surface. The contact surface is the surface formed by two adjacent rollers and the inner wall of the directional drilling pipe.

2. The protective device for traction submarine cable crossing directional drilling according to claim 1, characterized in that: The protective body consists of two opposing clamps with a semi-circular cross-section, and the two clamps can be opened and closed.

3. The protective device for traction submarine cable crossing directional drilling according to claim 2, characterized in that: Both of the clamps are detachably fixed to each other by bolts.

4. The protective device for traction submarine cable crossing directional drilling according to claim 2, characterized in that: The two clamps are detachably fixed on one side by bolts, and rotatably connected on the other side by pins.

5. A protective device for traction submarine cable crossing directional drilling according to any one of claims 1 to 4, characterized in that: The inner wall of the protective body is equipped with a cushioning pad.

6. A protective device for traction submarine cable crossing directional drilling according to any one of claims 1 to 4, characterized in that: The connecting part includes a pulling part and a support part welded between the pulling part and the protective body. The pulling part is provided with a pulling hole through it, and the axis of the pulling hole is parallel to the axis of the protective body.

7. A protective device for traction submarine cable crossing directional drilling according to any one of claims 1 to 4, characterized in that: The rolling part is centrally located on the protective body along the axial direction.

8. A protective device for traction submarine cable crossing directional drilling according to claim 7, characterized in that: The rolling part includes symmetrically and inclined brackets. The bottom of the brackets is welded and fixed to the protective body, and the tops are close to each other and welded with rotating seats. The rollers are rotatably mounted on the rotating seats.

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