Waterproof guide pipe structure for offshore oil drilling platform

Abstract

The utility model belongs to the technical field of riser pipes, and particularly relates to a riser pipe structure for an offshore oil drilling platform, which comprises a construction platform and a wellhead, and a guide device is arranged on the construction platform. According to the waterproof guide pipe structure for the offshore oil drilling platform, the two arc-shaped rings are folded and spliced on a wellhead, then the fastening bolts are screwed into the threaded holes in the connecting blocks, the two arc-shaped rings are fixedly connected, then the positioning columns are inserted into the positioning lug plates, and the arc-shaped rings are fixed; when the waterproof guide pipe vertically slides down along the interiors of the two arc-shaped rings, the guiding effect is achieved, the waterproof guide pipe is prevented from inclining due to vibration during pile descending, the rubber sleeve is connected to the top of the waterproof guide pipe in a sleeving mode, and then the hammer cap is connected to the rubber sleeve in a sleeving mode; therefore, impact force generated when the waterproof guide pipe is hammered is slowly released through the hammer cap and the rubber sleeve, and the waterproof guide pipe is prevented from being directly hammered and damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of water-blocking conduits, in particular to a water-blocking conduit structure for an offshore oil drilling platform. Background Art

[0002] The riser is a layer of pipe that goes from the offshore platform to the shallow rock and soil on the seabed. It is the first barrier for offshore drilling and oil and gas production. Its main function is to isolate seawater, form a channel for drilling fluid circulation and oil and gas production, and serve as a bearing structure for offshore wellheads. However, in some environments, the installation of the riser joint is very inconvenient. If the two ends are not vertically connected, the threads will be misaligned. Forcible tightening will cause damage to the threads and destroy the sealing environment. At the same time, due to the complex environment, it is easy to cause the joint to loosen.

[0003] As disclosed in Chinese patent announcement No. CN220487516U, a high-strength waterproof conductor for offshore oil drilling platforms is used. When in use, the sliding ring is first pushed to move, so that the sliding ring moves downward until the block enters the slot, and the limit block compression spring is pushed. When the block is completely entered into the slot, the limit block rebounds to limit the position of the block, so that the male and female joints remain in a relatively vertical state. At this time, the female joint is rotated to tighten the threads of the male and female joints to avoid thread misalignment. After the male and female joints are tightened, the limit sleeve on the outer wall of the L-shaped T-plate is slid downward and stuck into the outer wall of the T-plate to prevent the male and female joints from rotating to avoid loose joints. This solves the problem that the installation of the catheter joint is very inconvenient in some environments. If the two ends are not vertically connected, thread misalignment will occur. Forced tightening will cause thread damage and destroy the sealing environment. At the same time, due to the complex environment, it is easy to cause the joint to loosen.

[0004] However, the offshore oil drilling platform uses a high-strength watertight pipe, which has certain limitations because the hammering vibration of the pile hammer causes the upper part of the watertight pipe to vibrate and tilt during the construction of the pipe.

[0005] For this reason, we urgently need to provide a water-insulated pipe structure for an offshore oil drilling platform. Utility Model Content

[0006] The purpose of the utility model is to provide a watertight pipe structure for offshore oil drilling platforms, so as to solve the problem of high-strength watertight pipe for offshore oil drilling platforms proposed in the above-mentioned background technology, in which when the pipe is constructed, the hammering vibration of the pile hammer causes the upper part of the watertight pipe to vibrate and tilt.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a water-insulating conduit structure for an offshore oil drilling platform, comprising a construction platform and a wellhead, wherein the wellhead is penetrated and opened on the upper surface of the construction platform, and a guide device is arranged on the construction platform.

[0008] The guiding device comprises a guiding unit and a protecting unit.

[0009] The guide unit includes an arc-shaped ring, a connecting block, a positioning ear plate, and a positioning column. The arc-shaped ring is installed on the construction platform. The two connecting blocks are respectively fixedly connected to the front and rear ends of the arc-shaped ring. The positioning ear plate is fixedly connected to the left outer surface of the arc-shaped ring. The positioning column is installed inside the positioning ear plate, and its bottom is installed on the construction platform.

[0010] A further improvement is that there are two groups of guide units, the two groups of guide units are symmetrically arranged, and the two groups of guide units are internally slidably connected with a water-blocking duct.

[0011] A further improvement is that threaded holes are symmetrically provided on the upper and lower sides of the outer surface of the connecting block, and the internal threads of the threaded holes are connected with fastening bolts. The two arc-shaped rings are closed and spliced ​​above the wellhead, and then the fastening bolts are screwed into the threaded holes on the connecting block to achieve a fixed connection between the two arc-shaped rings. The positioning column is then inserted into the interior of the positioning ear plate and hammered into the interior of the construction platform to complete the fixation of the arc-shaped ring. At this time, the watertight duct slides vertically along the interior of the two arc-shaped rings, thereby playing a guiding role to prevent the watertight duct from being skewed due to vibration when piling, which would affect the installation of the watertight duct.

[0012] A further improvement is that the protection unit includes a rubber sleeve, a clamping block, and a hammer cap. The rubber sleeve is sleeved on the top of the water-proof pipe, and the two clamping blocks are fixedly connected to the left and right sides of the outer surface of the rubber sleeve respectively, and the hammer cap is sleeved on the rubber sleeve.

[0013] A further improvement is that the left and right sides of the inner wall of the hammer cap are respectively provided with snap-in grooves, the snap-in block is snapped into the inside of the snap-in groove, the rubber sleeve is sleeved on the top of the watertight pipe, and then the hammer cap is sleeved on the rubber sleeve, so that the impact force generated when hammering the watertight pipe is relieved by the hammer cap and the rubber sleeve, avoiding the watertight pipe from being directly damaged by the hammer, and the cooperation of the snap-in groove and the snap-in block can avoid the rubber sleeve and the hammer cap from rotating when hammering, causing the watertight pipe to be tilted under force.

[0014] A further improvement is that a threaded end is fixedly connected to the top of the water-blocking conduit, and an internal thread is provided at the bottom of the inner wall of the water-blocking conduit, and the two are threadedly connected. Multiple water-blocking conduits can be connected end to end via the threaded end and the internal thread provided on the bottom wall of the water-blocking conduit.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The offshore oil drilling platform uses a watertight pipe structure, which combines two arc-shaped rings together and spliced ​​above the wellhead. Then, the fastening bolts are screwed into the threaded holes on the connecting block to achieve a fixed connection between the two arc-shaped rings. The positioning columns are then inserted into the positioning ear plates and hammered into the construction platform to fix the arc-shaped rings. At this time, the watertight pipe slides vertically along the inside of the two arc-shaped rings, thereby playing a guiding role and preventing the watertight pipe from being skewed due to vibration during piling, which affects the installation of the watertight pipe.

[0017] 2. The offshore oil drilling platform uses a watertight pipe structure, in which a rubber sleeve is sleeved on the top of the watertight pipe, and then a hammer cap is sleeved on the rubber sleeve, so that the impact force generated when the watertight pipe is hammered is released slowly through the hammer cap and the rubber sleeve, preventing the watertight pipe from being directly damaged by the hammer, and the cooperation of the clamping groove and the clamping block can prevent the rubber sleeve and the hammer cap from rotating when hammering, causing the watertight pipe to be tilted under force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the split structure of the guide unit of the utility model from a top view;

[0020] Figure 3 This is a schematic diagram of the split structure of the protection unit of the utility model;

[0021] Figure 4 It is a schematic diagram of the water-blocking conduit splicing and splitting structure of the utility model.

[0022] In the figure: 1. construction platform; 2. wellhead; 301. arc ring; 302. connecting block; 303. positioning ear plate; 304. positioning column; 305. fastening bolt; 306. rubber sleeve; 307. clamping block; 308. hammer cap; 4. water-blocking pipe; 401. threaded end. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 4 , the utility model provides a technical solution: Example

[0025] A water-insulating pipe structure for an offshore oil drilling platform comprises a construction platform 1 and a wellhead 2. The wellhead 2 is penetrated and opened on the upper surface of the construction platform 1. A guide device is arranged on the construction platform 1.

[0026] The guide device comprises a guide unit.

[0027] The guide unit includes an arc ring 301, a connecting block 302, a positioning ear plate 303, and a positioning column 304. The arc ring 301 is installed on the construction platform 1. The two connecting blocks 302 are fixedly connected to the front and rear ends of the arc ring 301 respectively. The positioning ear plate 303 is fixedly connected to the left outer surface of the arc ring 301. The positioning column 304 is installed inside the positioning ear plate 303, and its bottom is installed on the construction platform 1.

[0028] There are two groups of guide units, which are symmetrically arranged. The two groups of guide units are internally slidably connected with a water-blocking conduit 4.

[0029] Threaded holes are symmetrically provided on the upper and lower sides of the outer surface of the connecting block 302, and the internal threads of the threaded holes are connected with fastening bolts 305. The two arc-shaped rings 301 are put together and spliced ​​on the wellhead 2, and then the fastening bolts 305 are screwed into the threaded holes on the connecting block 302 to achieve the fixed connection between the two arc-shaped rings 301. The positioning column 304 is then inserted into the interior of the positioning ear plate 303 and hammered into the interior of the construction platform 1 to complete the fixation of the arc-shaped ring 301. At this time, the watertight duct 4 slides vertically along the interior of the two arc-shaped rings 301, thereby playing a guiding role to prevent the watertight duct 4 from being skewed due to vibration when piling, thereby affecting the installation of the watertight duct 4.

[0030] A threaded end 401 is fixedly connected to the top of the watertight pipe 4, and an internal thread is provided at the bottom of the inner wall of the watertight pipe 4. The two are threadedly connected. Multiple watertight pipes 4 can be connected end to end through the threaded end 401 and the internal thread provided on the bottom wall of the watertight pipe 4. Example

[0031] On the basis of Example 1, the guide device includes a protective unit, which includes a rubber sleeve 306, a clamping block 307, and a hammer cap 308. The rubber sleeve 306 is sleeved on the top of the water-blocking pipe 4, and the two clamping blocks 307 are respectively fixedly connected to the left and right sides of the outer surface of the rubber sleeve 306, and the hammer cap 308 is sleeved on the rubber sleeve 306.

[0032] The inner wall of the hammer cap 308 is provided with a snap-in groove on both sides, and the snap-in block 307 is snapped into the inside of the snap-in groove. The rubber sleeve 306 is sleeved on the top of the watertight pipe 4, and then the hammer cap 308 is sleeved on the rubber sleeve 306, so that the impact force generated when hammering the watertight pipe 4 is released slowly through the hammer cap 308 and the rubber sleeve 306, avoiding the watertight pipe 4 from being directly damaged by the hammer. The cooperation of the snap-in groove and the snap-in block 307 can avoid the rubber sleeve 306 and the hammer cap 308 from rotating when hammering, causing the watertight pipe 4 to be tilted under force.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A waterproof pipe structure for an offshore oil drilling platform, comprising a construction platform (1) and a wellhead (2), wherein the wellhead (2) penetrates and is opened on the upper surface of the construction platform (1), and is characterized in that: A guide device is provided on the construction platform (1); The guiding device comprises a guiding unit and a protecting unit; The guide unit comprises an arc-shaped ring (301), a connecting block (302), a positioning ear plate (303), and a positioning column (304); the arc-shaped ring (301) is installed on the construction platform (1); two connecting blocks (302) are respectively fixedly connected to the front and rear ends of the arc-shaped ring (301); the positioning ear plate (303) is fixedly connected to the left outer surface of the arc-shaped ring (301); the positioning column (304) is installed inside the positioning ear plate (303), and its bottom is installed on the construction platform (1).

2. The waterproof pipe structure for an offshore oil drilling platform according to claim 1, characterized in that: There are two groups of guide units in total, and the two groups of guide units are symmetrically arranged. The two groups of guide units are internally slidably connected with a water-blocking conduit (4).

3. The waterproof pipe structure for an offshore oil drilling platform according to claim 1, characterized in that: The outer surface of the connection block (302) is provided with threaded holes symmetrically on both sides, and the inner threads of the threaded holes are connected with fastening bolts (305).

4. The waterproof pipe structure for an offshore oil drilling platform according to claim 1, characterized in that: The protection unit comprises a rubber sleeve (306), a clamping block (307), and a hammer cap (308); the rubber sleeve (306) is sleeved on the top of the water-blocking pipe (4); the two clamping blocks (307) are respectively fixedly connected to the left and right sides of the outer surface of the rubber sleeve (306); and the hammer cap (308) is sleeved on the rubber sleeve (306).

5. The waterproof pipe structure for offshore oil drilling platform according to claim 4, characterized in that: The inner wall of the hammer cap (308) is provided with clamping grooves on both sides, and the clamping block (307) is clamped inside the clamping grooves.

6. The waterproof pipe structure for offshore oil drilling platform according to claim 2, characterized in that: A threaded end (401) is fixedly connected to the top of the water-blocking conduit (4), and an internal thread is provided at the bottom of the inner wall of the water-blocking conduit (4), and the two are threadedly connected.

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