CN201795790U - Simulation test machine for testing thermal deformation and thermal stress of deepwater tubing strings - Google Patents

Abstract

The utility model relates to a simulation test machine for testing thermal deformation and thermal stress of a deep water oil string, which comprises a device main body, an oil supply device and a water supply device, wherein the device main body comprises a plexiglass tube, an oil tube test piece is arranged in the plexiglass tube, sealing covers are arranged at two ends of the plexiglass tube for sealing, flowing water which can control the temperature and is in the reverse direction of the flowing direction of oil in the oil tube test piece is introduced into an annular space of the plexiglass tube and the oil tube test piece, and the oil tube test piece is connected with the oil supply device after penetrating the sealing covers. When the thermal deformation is tested, the oil tube test piece and the sealing cover at one end are in static sealing, the oil tube test piece and the sealing cover at the other end are in dynamic sealing, and a temperature sensor and a displacement sensor are arranged on the oil tube test piece; when the thermal stress is tested, the oil tube test piece is in static sealing with the sealing covers at two ends, and the temperature sensor and a strain sensor are arranged on the oil tube test piece. The device can measure the deformation and the stress of the string in any size, material and temperature difference, thus providing more accurate guarantee for practical applications.

Description

Simulation test machine for testing thermal deformation and thermal stress of deepwater tubing strings

technical field

The utility model relates to a test device for simulating the deformation behavior of tubular parts, in particular to a simulation test machine for testing the thermal deformation and thermal stress of oil pipe strings in a simulated deep water environment.

Background technique

In deepwater oil and gas well testing operations, the ubiquitous abnormal high temperature problems will lead to operational accidents such as pipe string damage, packer failure, control head upward movement, and wellhead elevation, which will have a serious impact on offshore oil production. Since there is a large temperature difference between the inner and outer walls of the tubing string during operation, and the current research on the thermal deformation of tubing strings with different temperature differences, materials, and sizes is not deep enough, the study of thermal deformation of tubing strings with different temperature differences, materials, and sizes is more valuable and valuable. practical meaning.

At present, the known measuring methods and measuring devices are all used for the measurement of the linear expansion coefficient of materials, and there are the following problems in directly measuring the thermal deformation of the tubing string with them: 1. The shape and size of the measured object are limited: The structure of the measured object is designed on the basis of the standard sample in the national standard for the determination of the material linear expansion coefficient, that is, a slender rod with a minimum length of 25±0.1mm and a radial dimension between 3 and 10mm. , these special-purpose dilatometers are not suitable for measuring mechanical parts with complex shapes; 2. The measurement temperature range is too wide: for the measurement of the thermal deformation of the tubing string, because the temperature range during operation is not large, the measurement and control temperature Measurement instruments with a wide range cannot achieve high-precision measurement; 3. The direction of measurement is single; 4. The working environment of the tubing string cannot be fully simulated.

Therefore, there is an urgent need in the field for a measuring device capable of fully simulating thermal deformation of tubing strings in deep water environments to solve the above problems.

Contents of the invention

In view of the above problems, the purpose of this utility model is to make up for the deficiencies of the existing thermal deformation test devices, and provide a simulation test machine capable of testing the thermal deformation and thermal stress of deep-water tubing strings under different internal and external temperature differences, different materials, and different sizes.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a simulation test machine for testing the thermal deformation of deep water tubing strings, including the main body of the device, oil supply equipment and water supply equipment, characterized in that the main body of the device includes a plexiglass tube , an oil pipe test piece is built in the plexiglass tube, and the two ends of the plexiglass tube are sealed with sealing caps, and a temperature-controllable flow of oil in the oil pipe test piece is introduced into the annular space between the plexiglass tube and the oil pipe test piece. Flowing water in the opposite direction; the oil pipe test piece passes through the sealing cover and is connected to the oil supply equipment, the oil pipe test piece is statically sealed with the sealing cover at one end, and is dynamically sealed with the sealing cover at the other end. The oil pipe test piece is provided with a temperature sensor and a displacement sensor. In this device, the oil pipe test piece and the sealing cover at the other end can be connected through a flange joint, and the flange joint is provided with a combined seal of a guide belt and an O-ring. Here, there may be multiple temperature sensors, which are attached to the surface of the oil pipe test piece at intervals through screws or magnets. The displacement sensor is arranged at the dynamic sealing end of the oil pipe test piece.

A simulation testing machine for testing the thermal stress of a deep-water oil pipe string, including a device main body, oil supply equipment and water supply equipment, characterized in that: the device main body includes a plexiglass tube, and an oil pipe test piece is built in the plexiglass tube. Both ends of the glass tube are sealed with sealing caps, and flowing water with controllable temperature and opposite to the flow direction of the oil in the oil tube test piece is introduced into the annular space between the plexiglass tube and the oil tube test piece; the oil tube test piece passes through The sealing cover is connected with the oil supply equipment, the oil pipe test piece is statically sealed with the two sealing covers, and a temperature sensor and a strain sensor are arranged on the oil pipe test piece. In this device, there are also multiple temperature sensors, which are attached to the surface of the oil pipe test piece at intervals through screws or magnets; there are multiple stress sensors, which are also attached to the surface of the oil pipe test piece at intervals through screws or magnets.

Because the utility model adopts the above technical scheme, it has the following advantages: 1. The utility model is provided with a sealed outer tube-plexiglass tube to hold simulated seawater and simulate the water environment; To simulate the state of the oil pipe in the water environment. 2. Fix both ends of the oil pipe test piece, and install stress sensors and temperature sensors on the outer surface of the oil pipe. By controlling the water temperature and oil temperature, the thermal stress of the oil pipe can be measured in real time. 3. One end of the oil pipe test piece is fixed, and the other end is set as a floating end. A displacement sensor is installed at the floating end. By controlling the water temperature and oil temperature, the thermal deformation of the oil pipe can be measured in real time, especially the axial deformation. 4. The length and thickness of the main body of this simulation device can be changed at will, that is, the oil pipe test piece can simulate various sizes. From this point, the deformation and stress measurement functions of any size pipe string can be realized. 5. Because the external water environment matrix is ordinary water, the requirements for the material of the tubing are far less than that of seawater, and more tubing materials can be tested, which greatly facilitates the measurement of the test. In short, the device can measure the deformation and stress of pipe strings of any size, material, and temperature difference, providing a more accurate guarantee for practical applications.

Description of drawings

Fig. 1 is a working principle diagram of the utility model

Fig. 2 is the entity structure schematic diagram of the present utility model

Figure 3 is a structural schematic diagram of the floating end of the tubing test piece

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is described in detail.

The utility model provides a deep-water oil pipe string thermal deformation simulation testing machine which can measure the thermal deformation and thermal stress of the deep-water oil pipe string under the conditions of different internal and external temperature differences, different materials, and different sizes, and can especially identify the axial thermal deformation of the oil pipe string.

The testing machine mainly includes important component systems such as circulation, support, control and detection, and realizes their respective functions through combination. As shown in Figure 1, it mainly includes the main body of the device 1, oil supply equipment 2, and water supply equipment 3. The central principle is: the main body of the device 1 simulates the state of the oil pipe in seawater, and the oil supply equipment 2 passes oil into the oil pipe test piece. The water supply equipment 3 creates a water environment around the oil pipe. Adjust the temperature difference inside and outside the oil pipe by controlling the oil temperature and water temperature; set various sensors around the oil pipe to measure the deformation characteristics of the oil pipe. Various valves, pumps and flow meters are installed in the oil supply and water supply systems to control the flow direction and flow rate of the fluid.

In a specific embodiment, as shown in FIGS. 1 and 2 , the device main body 1 includes a plexiglass tube 4 , and an oil pipe test piece 5 is built in the plexiglass tube 4 . Both ends of the plexiglass tube 4 are sealed with sealing covers 6 and 7, and the oil pipe test piece 5 passes through the sealing covers 6 and 7 to connect with the pipeline 8 of the external oil supply equipment. When the oil pipe is too long, support 9 can be set at the middle part, so as to avoid damaging the seals at both ends due to the excessive length of the oil pipe test piece, and facilitate the loading and unloading of the oil pipe test piece. The pipeline 10 connected to the water supply equipment 3 is also connected to the outside through the sealing covers 6 and 7, and the temperature-controllable oil pipe is connected to the annular space between the plexiglass tube 4 and the oil pipe test piece 5 from the water supply equipment 3. The flowing water in the opposite direction of oil flow in specimen 5 simulates seawater.

When performing thermal deformation and thermal stress simulation tests, the sealing forms of the oil pipe test piece 5 and the sealing covers 6 and 7 are different. In the thermal stress measurement test, the seals between the oil pipe test piece 5 and the sealing covers 6 and 7 are all static seals, and the seals that can be adopted include gasket seals or adhesive seals. In the thermal deformation measurement test, the seal between the oil pipe test piece 5 and the sealing cover (seal cover 6 shown in the figure) at one end is a static seal, while the other end of the oil pipe test piece 5 must be a floating end, that is, it is connected to the other end. A contact dynamic seal is used between the sealing covers (such as the sealing cover 7 ) at one end to ensure the thermal deformation of the oil pipe test piece 5 . In some embodiments, a flange joint 11 is welded to the floating end of the oil pipe test piece 5, as shown in FIG.

When performing a thermal stress measurement test, it is necessary to attach a plurality of temperature detection sensors 14 and a plurality of stress detection sensors 15 on the outer surface of the oil pipe test piece 5 through screws or magnet partitions.

When carrying out the thermal deformation measurement test, it is necessary to attach a plurality of temperature detection sensors 14 on the surface of the oil pipe test piece 5 through screws or magnet partitions, and to arrange a displacement detection sensor 16 at the floating end of the oil pipe test piece 5 . Arranging the displacement detection sensor 16 at the floating end can measure the deformation of the plexiglass tube and the oil tube relative to the plexiglass tube under different temperature differences.

In the present invention, the oil pipe test piece 5 can select test pieces with different sizes and different materials for testing.

A main frame 17 is provided at the bottom of the plexiglass tube 4 to reduce damage caused by stress concentration of the plexiglass tube 4 and ensure the safety and reliability of the test equipment. The middle support 9 can ensure the convenience of installation and disassembly of the test piece, reduce the influence of the downward force of the oil pipe test piece 5 on the sealing performance of both ends, and improve the installation accuracy of the oil pipe test piece 5 .

In the above-mentioned oil supply equipment 2 and water supply equipment 3, a thermometer 18, a flow meter 19, a pump 20, an on-off valve 21, a one-way valve 22, a regulating valve 23, etc. are correspondingly provided, and these are all conventionally equipped devices of fluid equipment. It is a conventional technology, so it will not be introduced too much here. Also connect a drainpipe at the bottom of the plexiglass tube 4, the drainpipe is connected to the pool 24, and after the water supply equipment stops working, the water in the equipment is discharged into the pool, which can avoid the corrosion of the equipment and the waste of water; The water will not get dirty and can be reused for the next experiment or for other purposes.

Through the oil supply equipment 2, the high-temperature oil with a set temperature is introduced into the oil pipe test piece 5, and the simulated seawater opposite to the oil is introduced into the plexiglass tube 4 through the water supply equipment 3. During the test, the temperature, stress, and deformation The measurement of other parameters can be controlled by a computer, and the sensors installed in each part can be used for real-time collection.

Although the utility model has been disclosed in detail by using the aforementioned specific embodiments, it is not used to limit the scope of protection of the utility model, and those skilled in the art shall be responsible for the various changes made without departing from the technical solution of the utility model. Protection is within the protection scope of the present utility model.

Claims (7)

1. simulation test machine of testing the thermal deformation of deep water tubing string, comprise apparatus main body, oil servicing facitities and supply equipment, it is characterized in that: described apparatus main body comprises a plexi-glass tubular, a built-in oil pipe test specimen in plexi-glass tubular, there is gland bonnet sealing at the two ends of plexi-glass tubular, in the annular space of plexi-glass tubular and oil pipe test specimen, feed Controllable Temperature, with the oil pipe test specimen in the oily opposite circulating water of flow direction; Described oil pipe test specimen passes described gland bonnet and is connected with oil servicing facitities, is static seal between a described oil pipe test specimen and the end gland bonnet, and is motive seal between the other end gland bonnet, and described oil pipe test specimen is provided with temperature sensor and displacement transducer.

2. the simulation test machine of test deep water tubing string as claimed in claim 1 thermal deformation is characterized in that: described oil pipe test specimen is connected by bump joint with other end gland bonnet, and described bump joint is provided with guidance tape and O type circle combination sealing.

3. the simulation test machine of test deep water tubing string as claimed in claim 1 thermal deformation is characterized in that: described temperature sensor is a plurality of, is sticked at interval in the appearance of described oil pipe test specimen by screw or magnet.

4. the simulation test machine of test deep water tubing string as claimed in claim 1 thermal deformation is characterized in that: described displacement transducer is arranged on the motive seal end of oil pipe test specimen.

5. simulation test machine of testing deep water tubing string thermal stress, comprise apparatus main body, oil servicing facitities and supply equipment, it is characterized in that: described apparatus main body comprises a plexi-glass tubular, a built-in oil pipe test specimen in plexi-glass tubular, there is gland bonnet sealing at the two ends of plexi-glass tubular, in the annular space of plexi-glass tubular and oil pipe test specimen, feed Controllable Temperature, with the oil pipe test specimen in the oily opposite circulating water of flow direction; Described oil pipe test specimen passes described gland bonnet and is connected with oil servicing facitities, is static seal between described oil pipe test specimen and two gland bonnets, and described oil pipe test specimen is provided with temperature sensor and strain transducer.

6. as a kind of simulation test machine of testing deep water tubing string thermal stress as described in the claim 5, it is characterized in that: described temperature sensor is a plurality of, is sticked at interval in the appearance of oil pipe test specimen by screw or magnet.

7. as a kind of simulation test machine of testing deep water tubing string thermal stress as described in the claim 5, it is characterized in that: described strain gauge is a plurality of, is sticked at interval in the appearance of oil pipe test specimen by screw or magnet.

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