CN106441766B - A kind of deep water production riser multiphase flow vibration testing device and method - Google Patents

Abstract

The invention discloses a kind of deep water production riser multiphase flow vibration testing devices, it includes transparent water tank（1）, transparent hose（2）, be set to transparent water tank（1）Interior vertical and straight movement rail system（3）, be set to transparent water tank（1）The horizontal movement rail system at top（4）, vertical and straight movement rail system（3）With horizontal movement rail system（4）It include servo motor（5）, pedestal A（6）, pedestal B（7）, belt pulley A（8）, belt pulley B（9）, Mobile base（10）And it is fixed on pedestal A（6）With pedestal B（7）Between guide rail（11）；It further includes control cabinet（15）, computer（16）, air compressor machine（17）, pressure regulator valve（18）, water tank（19）, flowmeter（20）And water pump（21）.The beneficial effects of the invention are as follows：Compact-sized, gathered data precision is high, standpipe can carry out different multiphase flow vibration experiments under different location state, easy to operate.

Description

A deep water production standpipe multiphase flow vibration experiment device and method

technical field

The invention relates to a deep-water production riser multiphase flow vibration experiment device and method.

Background technique

The marine riser is the lifeline connecting the offshore oil and gas production platform with the underwater wellhead or the submarine pipeline, and undertakes the heavy responsibility of the normal production and transportation of offshore oil and gas. The construction cost of submarine pipelines is high, and oil and gas mixed transportation are often used. The fluid in the pipeline belongs to gas-liquid two-phase flow, and the most common flow pattern is slug flow. After the slug flow enters the standpipe, not only will the pressure in the pipe and the outlet flow fluctuate violently periodically, but it will also induce pipeline vibration, shorten the service life of the standpipe, and even cause fatigue damage to the standpipe, seriously affecting safe production. In order to reduce and suppress the damage caused by vibration to marine risers, it is necessary to have a deeper understanding of the flow law of slug flow in the pipe and the mechanism of slug flow-induced vibration of marine risers. However, the existing experimental device can only study the influence of slug flow vibration on the standpipe, but cannot study the influence of bubbly flow, annular flow and mist flow vibration on the standpipe, and the standpipe in the existing experimental device is only A riser can be studied in one state.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art, and provide a multi-phase flow vibration of deep-water production risers with compact structure, high data acquisition accuracy, different multi-phase flow vibration experiments in different positions and states of the riser, and simple operation. Experimental apparatus and methods.

The purpose of the present invention is achieved through the following technical solutions: a deep water production standpipe multiphase flow vibration experiment device, which includes a transparent water tank, a transparent hose, a vertical movement track system arranged in the transparent water tank, and a vertical motion track system arranged on the top of the transparent water tank. The horizontal motion track system, the structure of the vertical motion track system and the horizontal motion track system is the same, the vertical motion track system includes a servo motor, a base A, a base B, a pulley A, a pulley B, a mobile seat and a The guide rail between A and base B, the servo motor is fixed on the base A, the output end of the servo motor is connected to the pulley A, the pulley B is rotated on the base B, the belt is installed between the pulley A and the pulley B, and the moving seat slides Installed on the guide rail and fixed on the belt, the mobile seat is provided with a three-way pipe, the base B of the vertical movement track system is fixed on the bottom of the transparent water tank, the base A and the base B of the horizontal movement track system are respectively It is fixed on the front and rear sides of the transparent water tank, and a transparent hose is connected between the two tee pipes, and a plurality of foam blocks are arranged at intervals along the length of the transparent hose, and an acceleration sensor is arranged on the transparent hose;

It also includes a control box, a computer, an air compressor, a pressure regulating valve, a water storage tank, a flow meter and a water pump. A pressure regulating valve is connected between the through pipes, and a flow meter is connected between the inlet end of the water storage tank and the three-way pipe of the horizontal movement track system; the control box is connected with the computer, the pressure regulating valve, the flow meter, the acceleration sensor and the servo motor connection.

The moving base is provided with a belt channel, a fixed plate and track holes for installing guide rails, the belt runs through the belt channel and is fixed with the fixed plate via pins.

A supporting rod is arranged between the moving seat and the tee pipe.

The water pump is arranged at the bottom of the transparent water tank.

The pressure regulating valve, the flow meter and the servo motor are all connected through signal lines.

The air compressor is connected with the three-way pipe of the vertical movement track system through the air pipe.

A groove is opened in the base B, and the pulley B is rotatably installed in the groove.

Described device is carried out the experimental method of multiphase flow vibration of deepwater production riser, and it comprises the following steps:

S1. Use a transparent hose to simulate the production riser, design the size of the production riser in the experiment, the internal fluid flow state and the production condition of the simulated production riser; use the foam block to simulate the buoyancy block;

S2. The computer controls the servo motors of the vertical motion track system and the horizontal motion track system to perform forward and reverse rotation through the control box, and move the bottom and top of the production riser to the positions required for the experiment;

S3, the data of the flowmeter, the pressure regulating valve and the acceleration sensor on the production riser are reset to zero;

S4. Start the water pump and air compressor to form a bubble flow inside the production riser, and form a stable flow state by adjusting the power of the water pump and the throttling size of the pressure regulating valve;

S5. After the bubbly flow is stable, the acceleration sensor measures the vibration parameters of the production standpipe, and at the same time, the flowmeter is used to measure the gas flow and liquid flow to calculate the bubbly flow parameters. The acceleration sensor and flowmeter transmit the data collected by each through the control box to the computer;

S6. Gradually increase the gas flow rate to form slug flow, annular flow and mist flow in sequence. After each flow state is stable, the vibration parameters of the production standpipe under each stable flow state are measured by the acceleration sensor, and the flow rate is used at the same time. The meter measures the gas flow and liquid flow to calculate the corresponding multiphase flow parameters, and the acceleration sensor and flowmeter transmit the data collected in the corresponding multiphase flow state to the computer through the control box;

S7. Through modal analysis and data processing, the vibration characteristics of the production riser under different multiphase flow conditions are obtained, thereby realizing the multiphase flow vibration experiment of the deepwater production riser.

The present invention has the following advantages: the present invention has compact structure, high accuracy of data collection, different multiphase flow vibration experiments can be carried out in different positions and states of the standpipe, and the operation is simple.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is a structural schematic diagram of the vertical motion track system;

Figure 3 is a schematic diagram of the installation of the mobile seat and the tee pipe;

Figure 4 is a schematic diagram of the installation of base B and pulley B;

Fig. 5 is a partially enlarged view of part I of Fig. 1;

In the figure, 1-transparent water tank, 2-transparent hose, 3-vertical movement track system, 4-horizontal movement track system, 5-servo motor, 6-base A, 7-base B, 8-pulley A, 9 -Pulley B, 10-moving seat, 11-guide rail, 12-belt, 13-tee pipe, 14-foam block, 15-control box, 16-computer, 17-air compressor, 18-pressure regulating valve, 19 -water storage tank, 20-flow meter, 21-water pump, 22-belt channel, 23-fixed plate, 24-track hole, 25-support rod, 26-signal line, 27-air pipe, 28-groove.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:

As shown in Figures 1 to 5, a deep-water production riser multiphase flow vibration experiment device includes a transparent water tank 1, a transparent hose 2, a vertical movement track system 3 installed in the transparent water tank 1, and a transparent water tank installed in the transparent water tank. 1 The horizontal movement track system 4 on the top, the transparent water tank 1 is filled with a certain depth of water to simulate the marine environment, the transparent water tank 1 is mainly for the convenience of observing the flow state in the tube and the vibration of the transparent hose 2; Hoses 1 are calculated by similarity theory to produce deformations consistent with flexible production risers. The structure of described vertical motion track system 3 and horizontal motion track system 4 is identical, vertical motion track system 3 comprises servomotor 5, base A6, base B7, belt pulley A8, belt pulley B9, mobile seat 10 and is fixed on base A6 and the guide rail 11 between the base B7, the base A6 is fixed with a servo motor 5, the output end of the servo motor 5 is connected with a pulley A8, the base B7 is rotatably equipped with a pulley B9, and a belt 12 is installed between the pulley A8 and the pulley B9, The mobile seat 10 is slidably mounted on the guide rail 11 and fixed on the belt 12. In this embodiment, the mobile seat 10 is provided with a belt channel 22, a fixed plate 23 and a track hole 24 for installing the guide rail 11. The belt 12 runs through the belt channel 22 and It is fixed with the fixed plate 23 through pins.

As shown in Figures 1 and 2, a tee pipe 13 is provided on the mobile seat 10, and a support rod 25 is provided between the mobile seat 10 and the tee pipe 13, and the base B7 of the vertical movement track system 3 is fixed on a transparent At the bottom of the water tank 1, the base A6 and the base B7 of the horizontal motion track system 4 are respectively fixed on the front and rear sides of the transparent water tank 1, and a transparent hose 2 is connected between the two tee pipes 13, and the transparent hose 2 is on and along the A plurality of foam blocks 14 are arranged at intervals in the length direction, and an acceleration sensor is arranged on the transparent hose 2, and the acceleration sensor can collect vibration parameters of the transparent hose 2.

As shown in Figure 1, it also includes a control box 15, a computer 16, an air compressor 17, a pressure regulating valve 18, a water storage tank 19, a flow meter 20 and a water pump 21, and the water pump 21 is arranged at the bottom of the transparent water tank 1, and the water pump The suction port of 21 communicates with the transparent water tank 1, and the pressure regulating valve 18 is connected between the output end of the air compressor 17 and the three-way pipe 13 of the vertical movement track system 3, and the inlet end of the water storage tank 19 is connected with the horizontal movement track system 4 A flow meter 20 is connected between the tee pipes 13, and the flow meter 20 can actually measure the gas flow and the liquid flow of the outlet; the control box 15 is connected with the computer 16, the pressure regulating valve 18, the flow meter 20, the acceleration sensor and the servo motor 5 is connected, and the computer 16 changes the moving speed and moving distance of the belt 12 by controlling the rotating speed of the servo motor 5, and controls the position of the belt 12. After the water pump 21 is started, the water in the transparent water tank 1 can enter the transparent hose 2 to simulate the oil recovery process, and the water flow can be controlled by adjusting the power of the water pump 21 . The water in the transparent hose 2 can be collected in the water storage tank 19 through the tee pipe 13 and the flow meter 20 of the horizontal movement track system 4 in sequence.

The pressure regulating valve 18, the flow meter 20 and the servo motor 5 are all connected through the signal line 26; the air compressor 17 is connected with the three-way pipe 13 of the vertical movement track system 3 through the air pipe 27; the base A groove 28 is provided in the B7, and the pulley B9 is rotatably installed in the groove 28. Simulation of multiphase flow: start the air compressor 17, the air produced by the air compressor 17 enters the production riser through the air pipe 27, and the gas enters the production riser and the liquid in the riser through the three-way pipe 13 of the vertical movement track system 3 Mix to form a multiphase flow, and then adjust the power of the water pump 21 and the throttling size of the pressure regulating valve 18 to finally form a multiphase flow with different flow states, such as bubble flow, slug flow, annular flow, and mist flow.

As shown in Fig. 1, described device carries out the experimental method of deepwater production riser multiphase flow vibration, and it comprises the following steps:

S1, using the transparent hose 2 to simulate the production riser, designing the size of the production riser and the internal fluid flow state and the production conditions of the simulated production riser in the experiment; using the foam block 14 to simulate the buoyancy block;

S2, the computer 16 controls the servo motor 5 of the vertical motion track system 3 and the horizontal motion track system 4 through the control box 15 to do forward and reverse rotation, the servo motor 5 drives the belt pulley A8 to rotate, the belt pulley A8 drives the belt pulley B9 to rotate through the belt 12, and the belt 12 Drive the moving seat 10 to move along the guide rail 11, and move the bottom and top of the production riser to the positions required for the experiment; therefore, the position of the production riser can be changed arbitrarily;

S3, the data of the flowmeter 20, the pressure regulating valve 18 and the acceleration sensor on the production riser are reset to zero;

S4, start the water pump 21 and the air compressor 17 to form a bubble flow inside the production riser, and form a stable flow state by adjusting the power of the water pump 21 and the throttling size of the pressure regulating valve 18;

S5, after the bubbly flow is stabilized, the acceleration sensor measures the vibration parameters of the production riser, and simultaneously utilizes the flowmeter 20 to measure the gas flow and the liquid flow to calculate the bubbly flow parameters, and the acceleration sensor and the flowmeter 20 control the data collected respectively Box 15 passes to computer 16;

S6. Gradually increase the gas flow rate to form slug flow, annular flow and mist flow in sequence. After each flow state is stable, the vibration parameters of the production standpipe under each stable flow state are measured by the acceleration sensor, and the flow rate is used at the same time. The meter 20 measures the gas flow rate and the liquid flow rate to calculate the corresponding multiphase flow parameters, and the acceleration sensor and the flow meter 20 transmit the data collected in the corresponding multiphase flow state to the computer 16 through the control box 15;

S7. Through modal analysis and data processing, the vibration characteristics of the production riser under different multiphase flow conditions are obtained, thereby realizing the multiphase flow vibration experiment of the deepwater production riser. Therefore, the standpipe of this experimental device can carry out different multiphase flow vibration experiments in different positions and states.

Claims (7)

1. a kind of deep water production riser multiphase flow vibration testing device, it is characterised in that：It includes transparent water tank（1）, it is transparent soft Pipe（2）, be set to transparent water tank（1）Interior vertical and straight movement rail system（3）, be set to transparent water tank（1）The horizontal fortune at top Dynamic rail system（4）, the vertical and straight movement rail system（3）With horizontal movement rail system（4）Structure it is identical, it is vertical to transport Dynamic rail system（3）Including servo motor（5）, pedestal A（6）, pedestal B（7）, belt pulley A（8）, belt pulley B（9）, Mobile base （10）And it is fixed on pedestal A（6）With pedestal B（7）Between guide rail（11）, pedestal A（6）On be fixed with servo motor（5）, watch Take motor（5）Output end be connected with belt pulley A（8）, pedestal B（7）On be rotatably installed with belt pulley B（9）, belt pulley A（8）With Belt pulley B（9）Between belt is installed（12）, Mobile base（10）It is slidably mounted on guide rail（11）Above and it is fixed on belt（12） On, Mobile base（10）On be provided with three-way pipe（13）, the vertical and straight movement rail system（3）Pedestal B（7）It is fixed on transparent Water tank（1）Bottom, the horizontal movement rail system（4）Pedestal A（6）With pedestal B（7）It is individually fixed in transparent water tank （1）Front and back side, two three-way pipes（13）Between be connected with transparent hose（2）, transparent hose（2）It is spaced above and along its length It is disposed with multiple foam blocks（14）, transparent hose（2）On be provided with acceleration transducer；

It further includes control cabinet（15）, computer（16）, air compressor machine（17）, pressure regulator valve（18）, water tank（19）, flowmeter（20） And water pump（21）, the water pump（21）Water sucking mouth and transparent water tank（1）Connection, air compressor machine（17）Output end and vertical fortune Dynamic rail system（3）Three-way pipe（13）Between be connected with pressure regulator valve（18）, water tank（19）Arrival end and horizontal movement rail Road system（4）Three-way pipe（13）Between be connected with flowmeter（20）；The control cabinet（15）With computer（16）, pressure regulator valve （18）, flowmeter（20）, acceleration transducer and servo motor（5）Connection.

2. a kind of deep water production riser multiphase flow vibration testing device according to claim 1, it is characterised in that：Described Mobile base（10）On be provided with belt channel（22）, fixed plate（23）With for installing guide rail（11）Orbit hole（24）, belt （12）Through belt channel（22）And and fixed plate（23）Via pins are fixed.

3. a kind of deep water production riser multiphase flow vibration testing device according to claim 1, it is characterised in that：Described Mobile base（10）With three-way pipe（13）Between be provided with supporting rod（25）.

4. a kind of deep water production riser multiphase flow vibration testing device according to claim 1, it is characterised in that：Described Water pump（21）It is set to transparent water tank（1）Bottom.

5. a kind of deep water production riser multiphase flow vibration testing device according to claim 1, it is characterised in that：Described Pressure regulator valve（18）, flowmeter（20）And servo motor（5）Pass through signal wire（26）With control cabinet（15）Connection.

6. a kind of deep water production riser multiphase flow vibration testing device according to claim 1, it is characterised in that：Described Air compressor machine（17）Pass through tracheae（27）With vertical and straight movement rail system（3）Three-way pipe（13）Connection.

7. a kind of deep water production riser multiphase flow vibration testing device according to claim 1, it is characterised in that：Described Pedestal B（7）It inside opens up fluted（28）, belt pulley B（9）Rotation is installed on groove（28）It is interior.