High-temperature and high-pressure simulation test well device for downhole tool detection

Abstract

The utility model discloses a high-temperature and high-pressure simulation test well device for downhole tool detection, which comprises a shaft, the shaft is connected with a pressurization system and a heating system through a pipeline, the shaft is used for placing a downhole tool to be detected, and the pressurization system and the heating system are respectively used for providing a high-pressure environment and a high-temperature environment for the shaft; the shaft comprises a flange straight pipe, the flange straight pipe is sleeved with a heat conduction oil cylinder, and the flange straight pipe and the heat conduction oil cylinder are both cylindrical and form two layers of shafts through welding. The upper end and the lower end of the flange straight pipe are connected with an upper blind flange and a lower blind flange respectively, a mandrel hanger is connected to the center of the lower end of the upper blind flange, and a coupling is connected to the lower end of the mandrel hanger. A pressure inlet and a liquid inlet hole are further formed in the shaft. The test well device can provide a continuous high-temperature and high-pressure environment, so that the high-temperature and high-pressure performance of an underground tool can be detected on the ground.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil well tool testing and inspection devices, and relates to a high-temperature and high-pressure simulation test well device for testing downhole tools. Background Technology

[0002] High-temperature and high-pressure downhole tool testing systems are mainly used for type testing of components such as downhole packers, verifying the sealing performance of the packers during downhole setting, and checking the sealing performance parameters of the packers under high-temperature conditions. Currently, after the downhole tools are manufactured, they can only undergo internal pressure testing in the factory and cannot simulate actual use. Some existing well simulation devices can only test under normal temperature and pressure environments, and some devices can provide unstable high-pressure and high-temperature environments, but cannot provide a continuous high-temperature and high-pressure environment. Utility Model Content

[0003] The purpose of this invention is to provide a high-temperature and high-pressure simulation test well device for downhole tool testing, which can provide a continuous high-temperature and high-pressure environment, thereby enabling the testing of the high-temperature and high-pressure performance of downhole tools at the surface.

[0004] The technical solution adopted in this utility model is:

[0005] A high-temperature and high-pressure simulation test well device for downhole tool testing includes a well casing. The well casing is connected to a pressurization system and a heating system via pipelines. The well casing is used to place the downhole tool to be tested. The pressurization system and the heating system are used to provide a high-pressure and high-temperature environment for the well casing, respectively.

[0006] The wellbore includes a flanged straight pipe, and a heat transfer oil sleeve is fitted over the flanged straight pipe. Both are cylindrical and are welded together to form a two-layer wellbore. The upper and lower ends of the flanged straight pipe are respectively connected to an upper blind flange and a lower blind flange. An oil pipe hanger is connected to the center of the lower end of the upper blind flange, and a coupling is connected to the lower end of the oil pipe hanger. The wellbore is also equipped with a pressure inlet and a fluid inlet.

[0007] The features of this utility model also include:

[0008] The flange straight pipe is fastened to the upper blind flange by double-foot bolts and nuts; the flange straight pipe is fastened to the lower blind flange by double-foot bolts and nuts; sealing steel rings are provided between the flange straight pipe and the upper blind flange, and between the flange straight pipe and the lower blind flange for sealing.

[0009] The upper blind flange and the oil pipe hanger are tightened and fixed by compression nuts, and the two are sealed by an O-ring.

[0010] The lower blind flange is connected to a base, and the two are welded together to form a whole. The base is fixed to the ground with anchor bolts.

[0011] Two eye bolts are installed at the upper end of the upper blind flange.

[0012] Temperature sensor connection terminals are installed at the upper, middle and lower parts of the side wall of the heat transfer oil cylinder.

[0013] There are three pressure inlets: one through the center of the upper blind flange, and two at the top and bottom of the straight pipe sidewall of the flange; and pressure relief holes are provided on the opposite sidewalls of the two pressure inlets on the straight pipe sidewall of the flange.

[0014] The pressurization system is an ultra-high pressure liquid testing system, which is connected to the wellbore through pipelines to three pressure inlets to control the pressure of the central tubing and the upper and lower end casing pressure of the downhole tool to be tested.

[0015] There are two liquid inlets, located at the upper and lower ends of the side wall of the heat transfer oil cylinder respectively; an exhaust port is provided on the opposite side wall of the upper liquid inlet, and a drain port is provided on the opposite side wall of the lower liquid inlet.

[0016] The heating system is a heat transfer oil heating and circulation insulation system, which is connected to the two inlet ports of the wellbore through pipelines.

[0017] The beneficial effects of this utility model are:

[0018] (1) The wellbore in the test well device of this utility model has a two-layer structure. The internal structure provides a simulated well environment and is designed to withstand a pressure of 140MPa. The external wellbore provides high-temperature heat transfer oil circulation and provides a heat source to the internal wellbore. It can provide a high-temperature and high-pressure simulated environment at the same time.

[0019] (2) The lower end of the upper blind flange of the wellbore of this utility model is connected to the tubing hanger. The downhole tools can be connected to the pressurization system through the tubing hanger. The connection and sealing between the tubing hanger and the upper blind flange is completed by the combination of the compression nut and the sealing ring, which is more stable than the welding method and easier to replace the vulnerable parts. The wellbore base is connected to the pre-embedded cast-in-place foundation, which provides a stable wellbore working environment and reduces the impact of impact and vibration.

[0020] (3) The outer wall of the well is equipped with three sets of temperature sensor connection terminals (upper, middle and lower), which can transmit the temperature of the well in real time and set a constant value for the temperature at the control terminal. Once the temperature rises or falls suddenly, the control terminal can automatically adjust the temperature.

[0021] (4) The outer wall of the well is provided with a liquid inlet and a drain outlet. When the heat transfer oil is replaced regularly, it can be replaced either by circulating the oil through the heating system or by replacing it through the liquid inlet and the drain outlet. The upper blind flange of the well and the upper and lower ends of the well side wall are provided with pressure inlets. The pressure provided by the external pressurization system enters through the pressure inlets. The upper and lower ends of the well side wall are also provided with emergency pressure relief holes. When the well gets stuck, it can be pressured in an emergency.

[0022] (5) The experimental well device of this utility model can provide a continuous high temperature and high pressure simulation environment. After the production of downhole tools is completed, the on-site environment can be simulated to test the quality of the produced products. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the wellbore structure in the experimental well device of this utility model;

[0024] Figure 2 This is a schematic diagram of the wellhead structure of the wellbore in the experimental well device of this utility model.

[0025] In the diagram, 1. Upper blind flange, 2. Base, 3. Heat transfer oil cylinder, 4. Lower blind flange, 5. Compression nut, 6. Oil pipe hanger, 7. Flange straight pipe, 8. Coupling, 9. Eye bolt, 10. O-ring, 11. Sealing steel ring, 12. Double-ended bolt, 13. Nut, 14. Temperature sensor connection end, 15. Pressure inlet, 16. Pressure relief hole, 17. Liquid inlet, 18. Exhaust port, 19. Drain port. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0027] Example 1:

[0028] This utility model relates to a high-temperature and high-pressure simulation test well device for downhole tool testing, comprising three parts: a wellbore, a pressurization system, and a heating system. The wellbore is used to place the downhole tool to be tested, the pressurization system is used to provide a high-pressure environment for the wellbore, and the heating system is used to provide a high-temperature environment for the wellbore.

[0029] The structure of the well shaft is as follows Figure 1 and Figure 2 As shown, it includes a flanged straight pipe 7 for holding the tool to be tested. A heat transfer oil cylinder 3 is fitted over the flanged straight pipe 7. During use, the heat transfer oil circulates within the heat transfer oil cylinder 3 to provide a high-temperature environment. Both the flanged straight pipe 7 and the heat transfer oil cylinder 3 are cylindrical, and they are welded together to form two layers of well casing, constituting the simulated well casing body.

[0030] The lower end of the flange straight pipe 7 is connected to the lower blind flange 4, and the two are fastened together by double anchor bolts 12 and nuts 13. The lower end of the lower blind flange 4 is connected to the base 2, and the two are welded together to form a whole. The base 2 is fixed to the ground by anchor bolts.

[0031] The upper end of the flange straight pipe 7 is connected to the upper blind flange 1, and the two are fastened together by double bolts 12 and nuts 13. At the center of the lower end of the upper blind flange 1, a tubing hanger 6 is connected, and the two are tightened together by a compression nut 5, and sealed together by an O-ring 10. The lower end of the tubing hanger 6 is connected to a coupling 8, which is used to connect the downhole tool to be inspected.

[0032] Two lifting eye bolts 9 are provided at the upper end of the upper blind flange 1 for easy lifting. Sealing steel rings 11 are provided between the flange straight pipe 7 and the upper blind flange 1, and between the flange straight pipe 7 and the lower blind flange 4, for sealing purposes.

[0033] Temperature sensor connection terminals 14 are provided at the upper, middle and lower parts of the side wall of the heat transfer oil cylinder 3, which are used to connect temperature sensors to monitor the heating temperature of the wellbore in real time during detection.

[0034] The upper blind flange 1 has a pressure inlet 15 extending axially through its center. During testing, gas or liquid enters the flange straight pipe 7 through the pressure inlet 15, via the tubing hanger 6, to create the high-pressure environment required for testing. Additionally, pressure inlets 15 are also located at the upper and lower ends of the flange straight pipe 7's sidewall. During testing, gas or liquid enters the flange straight pipe 7 through these two pressure inlets 15. The pressure inlets 15 of the upper blind flange 1 and the pressure inlets 15 at the upper and lower ends of the flange straight pipe 7 correspond to the central tubing pressure and the upper and lower sleeve pressure of the downhole tool to be tested, respectively. Pressure relief holes 16 are also provided on the opposite sidewalls of the two pressure inlets 15 on the flange straight pipe 7's sidewall to discharge gas or liquid when the pressure is too high.

[0035] Both the upper and lower ends of the side wall of the heat transfer oil cylinder 3 are provided with liquid inlet holes 17, through which heat transfer oil enters the heat transfer oil cylinder 3; an exhaust port 18 is provided on the opposite side wall of the upper liquid inlet hole 17, and an exhaust valve is installed at the exhaust port 18 to discharge the gas in the heat transfer oil cylinder 3; a drain port 19 is provided on the opposite side wall of the lower liquid inlet hole 17, and a drain valve is installed at the drain port 19 for replacing the heat transfer oil.

[0036] The pressurization system is an ultra-high pressure liquid testing system, which is connected to the wellbore through three pressure inlets 15 via pipelines. These inlets are used to control the pressure of the central tubing and the upper and lower casing pressures of the downhole tool under test. The ultra-high pressure liquid testing system consists of a drive gas circuit and a pressurization liquid circuit. The gas-driven liquid pump in the drive gas circuit is the core device, using a drive gas source as the power source and heat transfer oil as the working medium. A shut-off valve is installed at the pressurization outlet, and the output pressure is controlled by a manual pressure reducing valve for the drive gas.

[0037] The ultra-high pressure fluid testing system fills the downhole tool under test with the high-pressure fluid required for the test. Once the required pressure in the upper and lower chambers and the central tubing of the downhole tool reaches the set value, the fluid supply valves in the upper and lower chambers and the central tubing are automatically closed, and the booster pump stops working. After the hydraulic test is completed, the fluid is discharged through the pressure relief hole 16.

[0038] The heating system is a heat transfer oil heating and circulation insulation system, which is connected to the wellbore through two inlet ports 17 via pipelines. The system mainly consists of an expansion tank, a pipeline heater, a high-temperature circulating oil pump, and an electrical control system, forming a closed-loop circulation system. Heat transfer oil is injected into the system through the high-level expansion tank, then pumped into the electric heater via the main circulation pipeline. After heating, it is sent to the wellbore and then back into the electric heater via the main circulation pipeline, thus forming a closed-loop circulation to achieve the purpose of heating and insulating the simulated test wellbore to reach the required test temperature. The heating temperature and heating rate can be set according to the process requirements. Once the set temperature is reached, the heating system enters an automatic insulation program.

[0039] Example 2:

[0040] This embodiment of a high-temperature and high-pressure simulation test well device for downhole tool testing includes a well casing. The well casing is connected to a pressurization system and a heating system through pipelines. The well casing is used to place the downhole tool to be tested. The pressurization system and the heating system are used to provide a high-pressure and high-temperature environment for the well casing, respectively.

[0041] The wellbore includes a flanged straight pipe 7, and a heat transfer oil cylinder 3 is sleeved on the flanged straight pipe 7. Both are cylindrical and are welded together to form a two-layer wellbore. The upper and lower ends of the flanged straight pipe 7 are respectively connected to an upper blind flange 1 and a lower blind flange 4. An oil pipe hanger 6 is connected at the center of the lower end of the upper blind flange 1, and a coupling 8 is connected to the lower end of the oil pipe hanger 6. The wellbore is also equipped with a pressure inlet 15 and a fluid inlet 17.

[0042] Example 3:

[0043] This embodiment of a high-temperature and high-pressure simulation test well device for downhole tool testing includes a well casing. The well casing is connected to a pressurization system and a heating system through pipelines. The well casing is used to place the downhole tool to be tested. The pressurization system and the heating system are used to provide a high-pressure and high-temperature environment for the well casing, respectively.

[0044] The wellbore includes a flanged straight pipe 7, and a heat transfer oil cylinder 3 is sleeved on the flanged straight pipe 7. Both are cylindrical and are welded together to form a two-layer wellbore. The upper and lower ends of the flanged straight pipe 7 are respectively connected to an upper blind flange 1 and a lower blind flange 4. An oil pipe hanger 6 is connected at the center of the lower end of the upper blind flange 1, and a coupling 8 is connected to the lower end of the oil pipe hanger 6. The wellbore is also equipped with a pressure inlet 15 and a fluid inlet 17.

[0045] The flange straight pipe 7 is fastened to the upper blind flange 1 by double bolts 12 and nuts 13; the flange straight pipe 7 is fastened to the lower blind flange 4 by double bolts 12 and nuts 13; sealing steel rings 11 are provided between the flange straight pipe 7 and the upper blind flange 1 and between the flange straight pipe 7 and the lower blind flange 4 for sealing.

[0046] Example 4:

[0047] This embodiment of a high-temperature and high-pressure simulation test well device for downhole tool testing includes a well casing. The well casing is connected to a pressurization system and a heating system through pipelines. The well casing is used to place the downhole tool to be tested. The pressurization system and the heating system are used to provide a high-pressure and high-temperature environment for the well casing, respectively.

[0048] The wellbore includes a flanged straight pipe 7, and a heat transfer oil cylinder 3 is sleeved on the flanged straight pipe 7. Both are cylindrical and are welded together to form a two-layer wellbore. The upper and lower ends of the flanged straight pipe 7 are respectively connected to an upper blind flange 1 and a lower blind flange 4. An oil pipe hanger 6 is connected at the center of the lower end of the upper blind flange 1, and a coupling 8 is connected to the lower end of the oil pipe hanger 6. The wellbore is also equipped with a pressure inlet 15 and a fluid inlet 17.

[0049] The flange straight pipe 7 is fastened to the upper blind flange 1 by double bolts 12 and nuts 13; the flange straight pipe 7 is fastened to the lower blind flange 4 by double bolts 12 and nuts 13; sealing steel rings 11 are provided between the flange straight pipe 7 and the upper blind flange 1 and between the flange straight pipe 7 and the lower blind flange 4 for sealing.

[0050] The upper blind flange 1 and the oil pipe hanger 6 are tightened and fixed by the clamping nut 5, and the two are sealed by the O-ring seal 10.

[0051] Example 5:

[0052] This embodiment of a high-temperature and high-pressure simulation test well device for downhole tool testing includes a well casing. The well casing is connected to a pressurization system and a heating system through pipelines. The well casing is used to place the downhole tool to be tested. The pressurization system and the heating system are used to provide a high-pressure and high-temperature environment for the well casing, respectively.

[0053] The wellbore includes a flanged straight pipe 7, and a heat transfer oil cylinder 3 is sleeved on the flanged straight pipe 7. Both are cylindrical and are welded together to form a two-layer wellbore. The upper and lower ends of the flanged straight pipe 7 are respectively connected to an upper blind flange 1 and a lower blind flange 4. An oil pipe hanger 6 is connected at the center of the lower end of the upper blind flange 1, and a coupling 8 is connected to the lower end of the oil pipe hanger 6. The wellbore is also equipped with a pressure inlet 15 and a fluid inlet 17.

[0054] The flange straight pipe 7 is fastened to the upper blind flange 1 by double bolts 12 and nuts 13; the flange straight pipe 7 is fastened to the lower blind flange 4 by double bolts 12 and nuts 13; sealing steel rings 11 are provided between the flange straight pipe 7 and the upper blind flange 1 and between the flange straight pipe 7 and the lower blind flange 4 for sealing.

[0055] The upper blind flange 1 and the oil pipe hanger 6 are tightened and fixed by the clamping nut 5, and the two are sealed by the O-ring seal 10.

[0056] The lower blind flange 4 is connected to the base 2 at its lower end. The two are welded together to form a whole. The base 2 is fixed to the ground by anchor bolts.

[0057] Two eye bolts 9 are provided at the upper end of the upper blind flange 1.

[0058] Example 6:

[0059] This embodiment of a high-temperature and high-pressure simulation test well device for downhole tool testing includes a well casing. The well casing is connected to a pressurization system and a heating system through pipelines. The well casing is used to place the downhole tool to be tested. The pressurization system and the heating system are used to provide a high-pressure and high-temperature environment for the well casing, respectively.

[0060] The wellbore includes a flanged straight pipe 7, and a heat transfer oil cylinder 3 is sleeved on the flanged straight pipe 7. Both are cylindrical and are welded together to form a two-layer wellbore. The upper and lower ends of the flanged straight pipe 7 are respectively connected to an upper blind flange 1 and a lower blind flange 4. An oil pipe hanger 6 is connected at the center of the lower end of the upper blind flange 1, and a coupling 8 is connected to the lower end of the oil pipe hanger 6. The wellbore is also equipped with a pressure inlet 15 and a fluid inlet 17.

[0061] The flange straight pipe 7 is fastened to the upper blind flange 1 by double bolts 12 and nuts 13; the flange straight pipe 7 is fastened to the lower blind flange 4 by double bolts 12 and nuts 13; sealing steel rings 11 are provided between the flange straight pipe 7 and the upper blind flange 1 and between the flange straight pipe 7 and the lower blind flange 4 for sealing.

[0062] The upper blind flange 1 and the oil pipe hanger 6 are tightened and fixed by the clamping nut 5, and the two are sealed by the O-ring seal 10.

[0063] The lower blind flange 4 is connected to the base 2 at its lower end. The two are welded together to form a whole. The base 2 is fixed to the ground by anchor bolts.

[0064] Two eye bolts 9 are provided at the upper end of the upper blind flange 1.

[0065] Temperature sensor connection terminals 14 are provided at the upper, middle and lower parts of the side wall of the heat transfer oil cylinder 3.

[0066] There are three pressure inlets 15: the center of the upper blind flange 1 has a pressure inlet 15 that runs through its axis, the upper and lower ends of the side wall of the flange straight pipe 7 also have pressure inlets 15; and pressure relief holes 16 are also provided on the opposite side walls of the two pressure inlets 15 on the side wall of the flange straight pipe 7.

[0067] The pressurization system is an ultra-high pressure liquid testing system, which is connected to the wellbore through pipelines to three pressure inlets 15, so as to control the pressure of the central tubing and the upper and lower end casing pressure of the downhole tool to be tested.

Claims

1. A high temperature high pressure analog test well device for downhole tool detection, characterized in that, The well shaft is connected with a pressurizing system and a heating system through pipelines, and is used for placing a downhole tool to be detected, and the pressurizing system and the heating system are respectively used for providing a high-pressure and high-temperature environment for the well shaft. The flange straight pipe (7) is connected with the heat conducting oil cylinder (3) through welding, and both of them are cylindrical, and the flange straight pipe (7) is connected with the upper blind plate flange (1) and the lower blind plate flange (4) through welding, the upper blind plate flange (1) is connected with the tubing hanger (6) through welding, and the tubing hanger (6) is connected with the coupling (8) through welding, and the well shaft is further provided with the pressure inlet (15) and the liquid inlet (17).

2. The high temperature high pressure analog test well apparatus for downhole tool detection of claim 1, wherein, The flange straight pipe (7) is connected with the upper blind plate flange (1) and the lower blind plate flange (4) through the double foot bolt (12) and the nut (13), and the sealing steel ring (11) is arranged between the flange straight pipe (7) and the upper blind plate flange (1) and between the flange straight pipe (7) and the lower blind plate flange (4) to seal.

3. The high temperature high pressure analog test well apparatus for downhole tool detection of claim 1, wherein, The upper blind plate flange (1) is connected with the tubing hanger (6) through the pressing nut (5), and the O-shaped sealing ring (10) is arranged between the upper blind plate flange (1) and the tubing hanger (6) to seal.

4. The high temperature high pressure analog test well apparatus for downhole tool detection of claim 1, wherein, The lower blind plate flange (4) is connected with the base (2) through welding, and the base (2) is fixed to the ground through the anchor bolt.

5. The high temperature high pressure analog test well apparatus for downhole tool detection of claim 1, wherein, The upper end of the upper blind plate flange (1) is provided with two lifting ring screws (9).

6. The high temperature high pressure analog test well apparatus for downhole tool detection of claim 1, wherein, The temperature sensor connecting end (14) is arranged on the upper, middle and lower parts of the side wall of the heat conducting oil cylinder (3).

7. The high temperature high pressure analog test well apparatus for downhole tool detection of claim 1, wherein, The pressure inlet (15) is arranged on the center of the upper blind plate flange (1) and penetrates the axial direction, and the pressure inlets (15) are arranged on the upper and lower ends of the side wall of the flange straight pipe (7).

8. The high temperature high pressure analog test well apparatus for downhole tool detection of claim 7, wherein, The pressurizing system is an ultrahigh pressure liquid test system, which is connected with the three pressure inlets (15) of the well shaft through pipelines to control the tubing pressure and the upper and lower end sleeve pressures of the downhole tool to be tested.

9. The high temperature high pressure analog test well apparatus for downhole tool detection of claim 1, wherein, The liquid inlets (17) are arranged on the upper and lower ends of the side wall of the heat conducting oil cylinder (3), and the exhaust port (18) is arranged on the opposite side wall of the upper liquid inlet (17), and the sewage outlet (19) is arranged on the opposite side wall of the lower liquid inlet (17).

10. The high temperature high pressure analog test well apparatus for downhole tool detection of claim 9, wherein, The heating system is a heat conducting oil heating and circulating heat preservation system, which is connected with the two liquid inlets (17) of the well shaft through pipelines.

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