CN221620269U

CN221620269U - Single-point sea pipe cleaning system

Info

Publication number: CN221620269U
Application number: CN202323630041.2U
Authority: CN
Inventors: 周开浪; 谢进宜; 程占斗; 丁勇超; 袁瑞合; 王俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-12-28
Filing date: 2023-12-28
Publication date: 2024-08-30
Anticipated expiration: 2033-12-28

Abstract

The utility model discloses a single-point sea pipe cleaning system, which comprises a crude oil pipeline and a fresh water pipeline, wherein a connecting pipe is arranged between the crude oil pipeline and the fresh water pipeline, an underwater bypass valve is arranged on the connecting pipe, and the underwater bypass valve is positioned at the downstream of a reducing point of the crude oil pipeline and is close to the reducing part; one end of the crude oil pipeline, which is positioned at the land terminal, is connected with a ball receiving and sending cylinder, and is provided with a spherical pig which is adaptive to the ball receiving and sending cylinder, and the ball receiving and sending cylinder is used for transmitting and receiving the spherical pig. By utilizing the structure of communicating the two submarine pipelines, forward ball sending and reverse ball receiving operations can be realized as long as the ball receiving and receiving cylinder is arranged at the land end of the crude oil pipeline, namely, bidirectional movement of the spherical pig in a single submarine pipeline is realized, the cleanliness of the inside of the submarine pipeline is guaranteed, and the launching and receiving operations of the spherical pig are finished at the land terminal, so that the method is more convenient to implement and the economic cost is lower.

Description

Single-point sea pipe cleaning system

Technical Field

The utility model belongs to the field of oil pipeline cleaning structures, and particularly relates to a single-point sea pipe cleaning system.

Background

The main purpose of the single-point sea pipe is to process qualified crude oil to a lifting tanker for sale by external transportation, and the single-point sea pipe belongs to intermittent operation. When the oil tanker is moored at a single point, the oil conveying hose is connected with the oil tanker manifold, a land terminal oil conveying pump is started, and crude oil reaches the oil tanker through a land pipeline, a submarine pipeline, an underwater hose, a rotary joint and a floating hose. Generally, the line A and the line B are used for replacing the hose after the oil extraction is finished, wherein the line A is used for operating the crude oil and the light oil as media, and the line B is used for fresh water.

Because the sea pipe does not have a receiving and transmitting ball barrel from the area, the special structure of the single-point mooring system does not have the function of receiving and transmitting balls, the operation of cleaning the pipe and detecting the inside of the sea pipe can not be carried out at present, and on the other hand, the receiving ball barrel and the transmitting ball barrel are necessary equipment for cleaning the pipe of the sea pipe and are arranged at two ends of the sea pipe for transmitting and receiving the cleaning balls of the long pipeline. According to the normal pipe cleaning flow, a ball receiving cylinder is arranged at the upstream end of the sea pipe, and a ball receiving cylinder is arranged at the downstream end of the sea pipe, however, because a reducing part exists in an underwater crude oil pipeline close to a single point, the diameter of the underwater crude oil pipeline is generally changed from 24 inches to 16 inches, and the spherical pipe cleaning mode is influenced by a single point crude oil pipeline structure and a hose, under the condition of ensuring normal external delivery of crude oil, the mode of installing the ball receiving cylinder or the ball receiving cylinder at a single point on the sea is not practical, and the ball receiving cylinder and the ball receiving operation are more difficult to realize on a seabed base, so that the traditional spherical pipe cleaning mode of ball receiving at the head end and the tail end is not suitable for the single point sea pipe at all.

Disclosure of utility model

In view of the above, the utility model provides a single-point sea pipe cleaning system, which solves the problems of inconvenient cleaning of the single-point sea pipe and difficult implementation of cleaning work in the prior art.

The technical scheme is as follows:

A single-point sea pipe pigging system comprises a crude oil pipeline and a fresh water pipeline, and is characterized in that: a connecting pipe is arranged between the crude oil pipeline and the fresh water pipeline, an underwater bypass valve is arranged on the connecting pipe, and the underwater bypass valve is positioned at the downstream of the reducing point of the crude oil pipeline and is close to the reducing part;

One end of the crude oil pipeline, which is positioned at the land terminal, is connected with a ball receiving and sending cylinder, and is provided with a spherical pig which is adaptive to the ball receiving and sending cylinder, and the ball receiving and sending cylinder is used for transmitting and receiving the spherical pig.

By adopting the scheme, the pipe cleaning circulation route with the head end sent and received can be formed by utilizing the connecting pipe and the ball receiving and sending cylinder, in the pipe cleaning process, the pipe cleaning ball is sent out from the ball receiving and sending cylinder, the liquid supply forward pushing process is carried out until the pipe cleaning ball reaches the diameter-changing part of the crude oil pipeline, the underwater bypass valve is opened at the moment, water is injected through the fresh water pipeline, fresh water enters the upstream of the crude oil pipeline through the connecting pipe, the reverse pushing liquid discharge is carried out until the pipe cleaning ball returns to the ball receiving and sending cylinder, and the cleaning operation of the main pipe section of the crude oil pipeline is completed.

As preferable: the receiving and dispatching ball cylinder is of a vertical structure, the crude oil pipeline comprises a land pipe section, a lower bank pipe section and an underwater pipe section, and the receiving and dispatching ball cylinder, the land pipe section and the lower shore discharging pipeline section are connected through a switching three-way pipe, wherein the receiving and dispatching ball cylinder and the lower shore discharging pipeline section are coaxially arranged. By adopting the scheme, because the lower bank pipe section is a vertical pipe section parallel to the sea level generally, if the ball receiving and sending cylinder adopts a traditional horizontal structure, the clamping stagnation of the spherical pig is easily caused at the connecting part, the launching and receiving of the spherical pig are inconvenient, the operation reliability is greatly improved, the failure rate is reduced, the operation efficiency is improved, and the like by the vertical structure.

As preferable: a ball valve A is arranged between the receiving and transmitting ball cylinder and the switching three-way pipe, and a crude oil conveying gate valve is connected between the land pipe section and the switching three-way pipe. By adopting the scheme, when the ball valve A is opened, the oil conveying gate valve can be closed for cleaning a pipe after closing, and after cleaning a pipe, the ball valve A is closed, normal oil transportation can be started by opening the oil conveying gate valve, so that the oil pumping gap is convenient to quickly carry out, the occupied time of a pipeline is shortened, meanwhile, the ball receiving and sending barrel is avoided to be frequently disassembled and assembled, and the operation intensity of personnel is reduced.

As preferable: the receiving and dispatching ball cylinder is of a concentric reducing structure and comprises a middle section and an operation section which are integrally formed, wherein the pipe diameter of the middle section is identical to that of the lower shore discharging pipeline sections, the pipe diameter of the operation section is larger than that of the middle section, the operation section is positioned above the middle section, and the lower end of the receiving and dispatching ball cylinder is in sealing connection with the lower shore discharging pipeline sections through a flange structure.

By adopting the scheme, the ball receiving and transmitting cylinder has better gravity center stability, and meanwhile, the ball receiving and transmitting cylinder is convenient for the launching and taking out operation of the spherical pig.

As preferable: the position of the upper end of the receiving and transmitting ball cylinder, which is close to the end part, is provided with a water jacking and pressure relief pipeline and an observation pipeline which are communicated with the interior of the receiving and transmitting ball cylinder, wherein the water jacking and pressure relief pipeline is provided with a ball valve B, and the observation pipeline is respectively connected with a pressure gauge and an exhaust valve through a three-way pipe. By adopting the scheme, the side water jacking and pressure releasing mode is adopted, so that the launching and taking out of the spherical pig are facilitated, meanwhile, the observation pipeline is increased, and the operation safety is guaranteed.

As preferable: the top of receiving and dispatching ball section of thick bamboo is furnished with the blind plate, has the vertical fixed detection pipeline that sets up on the blind plate, is equipped with ball valve C on the detection pipeline, and the tip of detection pipeline is NPT screwed joint. By adopting the scheme, the detection cable connected with the spherical pig conveniently passes through, and the function of the spherical pig receiving and transmitting cylinder is increased.

As preferable: the spherical pig is of a bidirectional scraping symmetrical structure. By adopting the scheme, the smoothness of forward and reverse movement of the marine pipe in the sea can be ensured, and the clamping stagnation and the like are reduced.

Compared with the prior art, the utility model has the beneficial effects that:

By adopting the single-point sea pipe cleaning system provided by the utility model, by utilizing the structure that two underwater sea pipes are communicated, forward ball sending and reverse ball receiving operations can be realized as long as the ball receiving and sending cylinder is arranged at the land end of the crude oil pipeline, namely, bidirectional movement of the spherical pig in a single sea pipe is realized, the cleanliness of the interior of the sea pipe is guaranteed, and the launching and receiving operations of the spherical pig are finished at the land terminal, so that the system is more convenient to implement and has lower economic cost.

Drawings

FIG. 1 is a schematic view of the installation of the present utility model;

FIG. 2 is a schematic diagram of an in situ connection of a transceiver ball cylinder to a crude oil pipeline;

FIG. 3 is an embodiment of a mounting of a ball receiving and dispensing cartridge;

FIG. 4 is a schematic perspective view of the ball receiving and dispensing barrel of FIG. 3;

FIG. 5 is a second mounting embodiment of a service ball cartridge;

Fig. 6 is a schematic view of the structure of a pig.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

Referring to the single-point sea pipe cleaning system shown in fig. 1 to 6, the single-point sea pipe cleaning system mainly comprises a crude oil pipeline 1 and a fresh water pipeline 2, a connecting pipe 3 is arranged between the crude oil pipeline 1 and the fresh water pipeline 2, an underwater bypass valve 30 is arranged on the connecting pipe 3, the underwater bypass valve 30 is positioned at the downstream of a reducing point of the crude oil pipeline 1 and close to the reducing position, generally, a section of the crude oil pipeline 1 before reducing is longer, and the section of the crude oil pipeline is mainly a lantern pipe, a transfer pipeline positioned on a single-point buoyancy module A and the like after reducing, so that the cleaning operation mainly carries out ball cleaning on a large-diameter section of the crude oil pipeline 1.

The application discloses a two-way pipeline-receiving and pipeline-sending device, which is characterized in that a receiving and sending ball cylinder 4 is connected to one end of a crude oil pipeline 1, which is positioned at a land terminal, and is provided with a spherical pig matched with the receiving and sending ball cylinder 4, the receiving and sending ball cylinder 4 is used for transmitting and receiving the spherical pig, as shown in figure 1, the upstream of the crude oil pipeline 1 is connected with an oil storage tank 7, the upstream of a fresh water pipeline 2 is connected with a water storage tank 8, the crude oil pipeline 1 and the fresh water pipeline 2 can deliver oil to a tanker B through a rotary connector A2 on a single-point floating cabin A, wherein the single-point floating cabin A is provided with an in-cabin butterfly valve A13 and an external ball valve A which are arranged correspondingly to the crude oil pipeline 1, an in-cabin butterfly valve B20 and an external ball valve B which are arranged correspondingly to the fresh water pipeline 2 are positioned upstream of the rotary connector A2, the external ball valve A and the external ball valve B are positioned downstream of the rotary connector A2, and a bypass pipe A0 is arranged between the rotary connector A2 and the external ball valve A and the external ball valve B, and the bypass pipe A1 is arranged on the bypass pipe A0, and the bypass pipeline 4 is arranged on the single-point floating cabin A, and the pipeline-receiving and pipeline-sending device is characterized in that a two-way pipeline-receiving and pipeline-sending device is combined through the two-way pipeline-receiving and pipeline-sending ball valve 3, and a two-way pipeline-sending device, and a two-way pipeline control valve is realized, and a two-way pipeline control circulation loop and a pipeline control device.

As shown, the crude oil pipeline 1 generally comprises a land pipe section 10, a lower shore discharging pipeline section 11 and a submarine pipe section 12, wherein the land pipe section 10 is generally referred to as a land surface transportation pipe section, the lower shore pipe section 11 is referred to as a section extending vertically downward below sea level, and the submarine pipe section 12 is referred to as a section below sea level connected to the swivel connector A2, and in this case, the application preferably has a vertical structure in which the ball receiving and dispensing barrel 4, the land pipe section 10 and the lower shore discharging pipeline section 11 are connected by a switching tee 5, wherein the ball receiving and dispensing barrel 4 is coaxially arranged with the lower shore discharging pipeline section 11, i.e., the ball receiving and dispensing barrel 4 is also vertically arranged, and the land pipe section 10 is in a substantially horizontally arranged posture.

In order to further shorten the delay time of the pipe cleaning operation, a ball valve A6 is arranged between the ball receiving and sending cylinder 4 and the switching three-way pipe 5, and the crude oil conveying gate valve 50 is connected between the land pipe section 10 and the switching three-way pipe 5, so that after the pipe cleaning operation is finished, even if a cleaning ball is not taken out, the normal single-point oil extraction operation can be started by opening the crude oil conveying gate valve 50 under the condition of closing the ball valve A6, namely, the pipe cleaning and oil extraction can be partially crossed, and the waiting time is shortened.

The ball receiving and transmitting cylinder 4 is of a concentric variable diameter structure and comprises a centering section 40 and an operating section 41 which are integrally formed, wherein the pipe diameter of the centering section 40 is consistent with that of a lower shore discharging pipeline section 11, the pipe diameter of the operating section 41 is larger than that of the centering section 40, the inner diameter of the centering section 40 is basically consistent with or slightly larger than that of a pigball, the inner diameter of the operating section 41 is 1.2-1.5 times of the outer diameter of the pigball, the ball receiving and transmitting cylinder is convenient to load and take out the pigball, the operating section 41 is positioned above the centering section 40, and the lower end of the ball receiving and transmitting cylinder 4 is in sealing connection with the lower shore discharging pipeline section 11 through a flange structure.

The upper end of the ball receiving and transmitting tube 4 is provided with a water pushing and pressure releasing pipeline 42 and an observation pipeline 43 which are communicated with the inner part of the ball receiving and transmitting tube, wherein the water pushing and pressure releasing pipeline 42 is provided with a ball valve B420, the observation pipeline 43 is respectively connected with a pressure gauge 430 and an exhaust valve 431 through a three-way pipe, and the water pushing and pressure releasing pipeline 42 is mainly used for water injection in the pipe cleaning operation to provide pressure forward ball pushing or liquid discharge and pressure release in the ball returning process.

The blind plate 44 is arranged at the top of the ball receiving and sending cylinder 4, so that the detection requirement on the sea pipe in the process of pipe cleaning operation is met in order to increase the function of the ball receiving and sending cylinder 4, a detection pipeline 45 which is vertically and fixedly arranged is arranged on the blind plate 44, a ball valve C450 is arranged on the detection pipeline 45, and the end part of the detection pipeline 45 is an NPT threaded interface.

As shown in FIG. 6, in this embodiment, the spherical pig is of a bidirectional cleaning symmetrical structure, and one end of the spherical pig is provided with a hanging ring, so that the risk of the spherical pig jamming in the pipeline can be reduced, in addition, the ball receiving and sending cylinder 4 is also matched with a magnetic structure, such as a permanent magnet or electromagnet structure is arranged on the outer side wall of the working section 41, so that when the spherical pig reversely discharges to reach the working section 41, the spherical pig can be kept in the working section 41 through the magnetic structure, and the reliability is higher than that of a mode of stopping by means of self deflection.

Referring to fig. 1 to 6, with the single-point sea pipe cleaning system of the present application, the process of cleaning a ball is as follows, a land terminal closes a crude oil delivery gate valve 50, an in-cabin butterfly valve a13 and an in-cabin butterfly valve B20, opens a ball valve A6 and a blind plate 44, closes the blind plate 44 after the ball is dropped, opens the ball valve B420 to inject water into the upper part of the ball receiving and sending cylinder 4 to hold pressure, drives the ball to move forward along the crude oil pipeline 1 until reaching a reducing part, at this time, a large rise change in pressure in the pipeline can be observed through a pressure gauge 430, the top water and pressure relief pipeline 42 stop injecting liquid, then opens a water bypass valve 30, injects water into the crude oil pipeline 1 through a connecting pipe 3 through a fresh water pipeline 2, and the water flow pushes the ball to move backward along a large diameter section (shown by a thick line in fig. 1) along the crude oil pipeline 1 until returning to the working section 41, during which the top water and pressure relief pipeline 42 discharges water.

After the ball cleaning is determined to be positioned in the working section 41, and no water flow is discharged from the water ejection and pressure relief pipeline 42, the ball valve A6 is closed, if the ball valve A6 is not provided, the ball receiving and sending cylinder 4 can be kept in the working section by means of the magnetic attraction structure, the numerical value of the pressure gauge 430 is observed, and when the pressure is higher than the normal pressure value, the exhaust operation can be performed through the exhaust valve 431, so that the pressure in the ball receiving and sending cylinder 4 is ensured to be basically level with the external air pressure, and then the blind plate 44 is opened to lift the ball cleaning by utilizing the sling.

Finally, it should be noted that the above description is only a preferred embodiment of the present utility model, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. A single point sea pipe pig system comprising a crude oil pipeline (1) and a fresh water pipeline (2), characterized in that: a connecting pipe (3) is arranged between the crude oil pipeline (1) and the fresh water pipeline (2), an underwater bypass valve (30) is arranged on the connecting pipe (3), and the underwater bypass valve (30) is positioned at the downstream of a reducing point of the crude oil pipeline (1) and is close to the reducing part;

one end of the crude oil pipeline (1) located at the land terminal is connected with a ball receiving and sending cylinder (4), and is provided with a spherical pig matched with the ball receiving and sending cylinder (4), and the ball receiving and sending cylinder (4) is used for transmitting and receiving the spherical pig.

2. The single point sea pipe pig system according to claim 1, wherein: the receiving and dispatching ball cylinder (4) is of a vertical structure, the crude oil pipeline (1) comprises a land pipe section (10), a lower shore discharging pipeline section (11) and an underwater pipe section (12), the receiving and dispatching ball cylinder (4), the land pipe section (10) and the lower shore discharging pipeline section (11) are connected through a switching three-way pipe (5), and the receiving and dispatching ball cylinder (4) and the lower shore discharging pipeline section (11) are coaxially arranged.

3. The single point sea pipe pig system according to claim 2, wherein: a ball valve A (6) is arranged between the receiving and transmitting ball cylinder (4) and the switching three-way pipe (5), and a crude oil conveying gate valve (50) is connected between the land pipe section (10) and the switching three-way pipe (5).

4. A single point sea pipe pig system according to claim 2 or 3, characterized in that: the ball receiving and transmitting cylinder (4) is of a concentric reducing structure and comprises a middle section (40) and an operation section (41) which are integrally formed, wherein the pipe diameter of the middle section (40) is consistent with that of the lower shore discharging pipeline section (11), the pipe diameter of the operation section (41) is larger than that of the middle section (40), the operation section (41) is located above the middle section (40), and the lower end of the ball receiving and transmitting cylinder (4) is connected with the lower shore discharging pipeline section (11) in a sealing mode through a flange structure.

5. A single point sea pipe pig system according to claim 2 or 3, characterized in that: the position of the upper end of the receiving and transmitting ball cylinder (4) close to the end is provided with a water ejection and pressure relief pipeline (42) and an observation pipeline (43) which are communicated with the inside of the receiving and transmitting ball cylinder, wherein the water ejection and pressure relief pipeline (42) is provided with a ball valve B (420), and the observation pipeline (43) is respectively connected with a pressure gauge (430) and an exhaust valve (431) through a three-way pipe.

6. The single point sea pipe pig system according to claim 5, wherein: the top of receiving and dispatching ball section of thick bamboo (4) is disposed with blind plate (44), has vertical fixed detection pipeline (45) that set up on blind plate (44), is equipped with ball valve C (450) on detection pipeline (45), and the tip of detection pipeline (45) is NPT screwed joint.

7. The single point sea pipe pig system according to claim 1, wherein: the spherical pig is of a bidirectional scraping symmetrical structure.