Wellhead simulation testing device for operation under pressure

Abstract

The utility model discloses an under-pressure operation wellhead simulation test device which comprises a simulation test frame, the simulation test frame comprises a test frame base, the simulation test frame is used for fixing equipment to be tested, the test frame base is fixedly connected with a simulation test assembly, and the simulation test assembly is arranged in the simulation test frame. And the simulation test assembly is used for carrying out simulation test on the to-be-tested equipment. The simulation test assembly can simulate a part of conditions encountered by a tubular column underground, so that simulation test can be carried out on the under-pressure operation equipment on the ground to obtain related parameters, parameters are provided for operation of the under-pressure operation equipment, the simulation test can be carried out on the ground, and the test does not need to be carried out by digging a well actually. The simulation test jig does not need to use a tubular column with an actual length to carry out simulation test.

Description

Technical Field

[0001] This utility model belongs to the field of live-line operation equipment, and specifically relates to a live-line operation wellhead simulation testing device. Background Technology

[0002] Live pressure operations are a technique that relies on a live pressure operation rig installed at the wellhead to control wellhead pressure and the insertion tubing to achieve live well operations. Although this technique carries higher risks than conventional well control operations, it has been widely adopted due to its advantages such as best protection of oil and gas reservoirs, high efficiency, and low cost. In recent years, live pressure operations have become a relatively advanced operational method for oil and gas field exploration, development, and production.

[0003] Operating live drilling rigs and controlling key wellhead equipment demands higher skill levels from operators compared to conventional drilling rigs and workover rigs. Current operations often lack certain parameters for live drilling equipment, such as control and operational parameters, including the "suspension weight" and "top force" of the tubing string. This can lead to equipment damage, such as the slips damaging the passivation and anti-corrosion layers of the tubing string during live drilling; failure of the blowout preventer's front seal; short lifespan of sealing materials; and low operational efficiency. Furthermore, data acquisition through drilling underground or using actual tubing lengths is not only spatially limited but also costly. Utility Model Content

[0004] The purpose of this invention is to provide a live wellhead simulation testing device to solve the problems of equipment damage caused by the lack of certain parameters in live well operations, as well as the space limitations and high costs associated with obtaining parameters by drilling underground or using actual length tubing.

[0005] To address the aforementioned technical problems, this utility model provides a live wellhead simulation testing device, comprising a simulation testing frame, a testing frame base, and a simulation testing component fixedly connected to the testing frame base. The simulation testing component is disposed inside the simulation testing frame and is used to perform simulation testing on the testing device.

[0006] Furthermore, the simulation test component includes a simulation test cylinder, with one closed end of the simulation test cylinder fixedly connected to the test frame base, and the other telescopic end of the simulation test cylinder connected to a fixed base.

[0007] Furthermore, the cylinder body of the simulation test cylinder is equipped with a cylinder body pipe. One end of the cylinder body pipe is connected to the simulation test cylinder, and the other end of the cylinder body pipe is connected to the cylinder control component. The cylinder control component is used to control the extension and retraction of the simulation test cylinder.

[0008] Furthermore, a simulation test sensor is detachably connected to the side of the fixed base away from the simulation test cylinder. The simulation test sensor is used to provide some data during the simulation test process.

[0009] Furthermore, a column fixing part is provided in the middle of the side of the fixed base away from the simulation test cylinder, and the column fixing part is used to fix the simulation test column.

[0010] Furthermore, a sealing assembly is connected to the side of the simulation test sensor away from the fixed base. The sealing assembly includes a first sealing part, a sealing barrel connected to the first sealing part, one end of the sealing barrel being connected to the first sealing part, and the other end of the sealing barrel being connected to the side of the simulation test frame away from the simulation test cylinder.

[0011] Furthermore, a second sealing part is provided in the inner cavity of the sealed barrel, and the second sealing part is connected to the first sealing part.

[0012] Furthermore, a third sealing part is provided in the inner cavity of the sealed barrel, and the third sealing part is connected to the second sealing part.

[0013] Furthermore, an injection pipe is connected to the side wall of the sealing barrel. The injection pipe is used to inject liquid and / or gas into the inner cavity of the sealing barrel. The injection pipe is connected to the side wall of the sealing barrel at a location inside the sealing barrel where no sealing component is connected. A pressure gauge and an injection valve are also connected to the injection pipe.

[0014] Furthermore, the simulation test sensor is electrically connected to the control device, which is used to acquire data from the simulation test sensor.

[0015] The beneficial effects of the live wellhead simulation testing device provided by this utility model are as follows: Due to the design of the simulation testing frame, a simulation testing component is fixedly connected to the base of the frame. This component can perform simulation testing on the equipment under test, simulating some of the conditions encountered by the tubing string downhole. This allows for simulation testing of the live wellhead equipment on the surface to obtain relevant parameters, providing parameters for the operation of the live wellhead equipment. Since simulation testing can be performed on the surface, there is no need for actual well drilling. Furthermore, this simulation testing frame does not require the use of a tubing string of actual length for simulation testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a wellhead simulation testing device for live operation.

[0017] Figure 2 A schematic diagram of the wellhead simulation test device and slip assembly assembly for live operation;

[0018] Figure 3 A schematic diagram of the assembly of a live wellhead simulation testing device and a working gate.

[0019] Figure 4 This is a cross-sectional schematic diagram of the assembly of the sealed barrel, sealing components, and simulation test sensors. Detailed Implementation

[0020] To better understand the purpose, structure, and function of this utility model, the following description is in conjunction with the appendix. Figures 1 to 4 The present invention provides a more detailed description of a wellhead simulation testing device for pressurized operations.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a live wellhead simulation testing device, including a simulation testing frame 100 and a testing frame base 110. The testing frame base 110 is located at the bottom of the simulation testing frame 100. The simulation testing frame 100 is used to fix the device under test, which is fixed to the top of the simulation testing frame 100. A simulation testing component is fixedly connected to the testing frame base 110. The simulation testing component is disposed inside the simulation testing frame 100 and is used to perform simulation testing on the device under test.

[0022] In this invention, the simulation testing component includes a simulation testing cylinder 210. One closed end of the simulation testing cylinder 210 is fixedly connected to the test frame base 110, and the telescopic end of the simulation testing cylinder 210 is connected to a fixed base 220. A cylinder body pipe 211 is provided on the cylinder body of the simulation testing cylinder 210. One end of the cylinder body pipe 211 is connected to the simulation testing cylinder 210, and the other end is connected to a cylinder control component 500. The cylinder control component 500 is used to control the telescopic movement of the simulation testing cylinder 210. An oil pipe can be installed in the cylinder body pipe 211 to transport the oil required for the telescopic movement of the simulation testing cylinder 210. A communication pipe can also be installed in the cylinder body pipe 211 for monitoring the status of the simulation testing cylinder.

[0023] A simulation test sensor 230 is detachably connected to the side of the fixed base 220 away from the simulation test cylinder 210. The simulation test sensor 230 is used to provide some data during the simulation test. A column fixing part is provided in the middle of the side of the fixed base 220 away from the simulation test cylinder 210. The column fixing part is used to fix the simulation test column 400.

[0024] In actual operations, the tubing string length used is typically 9 to 10 meters, which is quite long. However, the tubing string 400 used in this live-line wellhead simulation testing device does not require the actual length; its length is reduced to approximately 1 meter. There is a hole at the top of the simulation testing frame 100 for the tubing string to pass through. During simulation testing, the tubing string 400 is first passed through the top of the simulation testing frame 100, extending all the way to the simulation testing sensor 230. The sensor used in the live-line wellhead simulation testing device can be a sensor with a channel in the middle, or it can be attached to the outer wall of the tubing string 400. After passing through the sensor, the tubing string 400 is detachably and fixedly connected to the fixed base 220.

[0025] After installing the tubing column 400, install the equipment to be simulated and tested on the top of the simulation test rack 100, and insert the tubing column 400 into the equipment to be simulated and tested.

[0026] like Figure 2 As shown, in some embodiments, a live wellhead simulation testing device is used to simulate the slip assembly 700. To test the slip assembly 700's holding state, the slip assembly 700 and its associated device need to be installed on the top of the simulation testing frame 100, away from the simulation testing cylinder 210. During simulation testing, the slip assembly 700 first holds the tubing string 400, and then the cylinder control component 500 controls the extension and retraction of the simulation testing cylinder 210. This allows the fixed base 220 to simulate some conditions inside the well, such as simulating the suspension weight on the actual downhole tubing string by pulling the tubing string 400 down towards the simulation testing cylinder 210, and simulating the upward force on the actual downhole tubing string by pushing the tubing string 400 up towards the simulation testing cylinder 210. Simultaneously, the sliding distance parameter of the tubing string 400 is obtained through simulation testing sensors, thereby obtaining the current working pressure parameters and engagement parameters of the slip assembly 700 and the tubing string 400.

[0027] Data on the gripping action of the slip assembly 700 on different slip strings can be obtained by replacing the 400 with different steel grades and diameters. This allows for the acquisition of the maximum gripping load of the slip assembly 700 on different steel grades of slip strings under the measurable maximum shut-off hydraulic force. This enables operators to calibrate the rated load of the slip assembly 700, providing reliable parameter support for subsequent practical operations.

[0028] like Figure 3 and Figure 4As shown, in some embodiments, a live wellhead simulation testing device is used to simulate the working gate 800. This type of test requires simulating different casing pressures to test the critical dynamic and static closing pressures of the working gate 800, determine the sealing status, and measure leakage parameters. Therefore, the simulation testing assembly also needs to have a certain degree of sealing performance. A sealing assembly is also connected to the side of the simulation testing sensor 230 away from the fixed base 220. The sealing assembly includes a first sealing part 240, on which a sealing barrel 270 is connected. One end of the sealing barrel 270 is connected to the first sealing part 240, and the other end of the sealing barrel 270 is connected to the side of the simulation testing frame 100 away from the simulation testing cylinder 210. An injection pipe 271 is connected to the side wall of the sealing barrel 270. The injection pipe 271 is used to inject liquid and / or gas into the inner cavity of the sealing barrel 270. The injection pipe 271 is connected to the side wall of the sealing barrel 270 at a place inside the sealing barrel 270 where no sealing component is connected. A pressure gauge 272 and an injection valve 273 are also connected to the injection pipe 271.

[0029] When simulating the working gate 800, a sealing barrel 270 needs to be installed. After the sealing barrel 270 is connected to the fixed base 220, a first sealing part 240 is also provided above the simulation test sensor 230. The purpose of this design is to prevent gas and / or liquid from intruding into the simulation test sensor 230 and causing damage when gas and / or liquid are subsequently injected into the sealing barrel 270, or even overflowing from the connection between the sealing barrel 270 and the fixed base 220, thus causing inaccurate simulation test results. After the end of the sealing barrel 270 away from the fixed base 220 is installed on the side of the simulation test frame 100 away from the simulation test cylinder 210, the working gate 800 is installed on the sealing barrel 270. After installation, gas and / or liquid are injected into the sealing barrel 270 through the injection pipe 271, and the opening and closing of the injection valve 273, and even the degree of opening and closing, are adjusted by the pressure display of the pressure gauge 272, so that the pressure of the sealing barrel 270 meets the requirements, thereby simulating the casing pressure in a real well.

[0030] This process can test the closing pressure of the working gate 800 under critical dynamic and static conditions under different sleeve pressures. When the working gate 800 is in a sealed state, the leakage parameters of the working gate 800 are measured. These leakage parameters are then used as hydraulic adjustment control parameters for other similar working gates under the same conditions in subsequent automatic control operations. Furthermore, by combining the simulation test of the extension and retraction of the hydraulic cylinder 210, the relative frictional force between the sealing material in the simulation test string 400 and the working gate 800 under different control pressures of the working gate 800 can be obtained. Simulation tests can also be conducted to obtain the pressure on the upper and lower end faces of the working gate 800 without activating the balancing system, and without causing the opening pressure difference in the state of front seal failure of the working gate 800. This allows for the estimation of the service life of the sealing assembly of the working gate 800 under certain pressure difference conditions.

[0031] In some embodiments, a second sealing part 250 is further provided in the inner cavity of the sealing barrel 270, and the second sealing part 250 is connected to the first sealing part 240. This second sealing part 250 can be made of a flexible sealing material. This allows for further simulation of real downhole conditions.

[0032] In some embodiments, a third sealing part 260 is provided in the inner cavity of the sealing barrel 270, and the third sealing part 260 is connected to the second sealing part 250. This design can further improve the airtightness of the simulation test component.

[0033] Understandably, the simulation test sensor 230 is electrically connected to the control device 600, and the control device 600 is used to acquire data from the simulation test sensor 230.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A simulated testing device for a wellhead under pressure, characterized in that, The simulation test frame (100) comprises a test frame base (110) for fixing a device under test, and a simulation test assembly fixedly connected to the test frame base (110) and arranged in the simulation test frame (100) and used for simulating test on the device under test.

2. The simulated test device for a wellhead operating under pressure according to claim 1, characterized in that, The simulation test assembly comprises a simulation test oil cylinder (210) having one end fixedly connected to the test frame base (110) and the other end connected to a fixed base (220).

3. The simulated test device for a wellhead operating under pressure according to claim 2, characterized in that, A cylinder pipe (211) is arranged on the cylinder body of the simulation test oil cylinder (210), one end of the cylinder pipe (211) is connected to the simulation test oil cylinder (210), and the other end of the cylinder pipe (211) is connected to an oil cylinder control assembly (500) used for controlling the simulation test oil cylinder (210) to extend and retract.

4. The simulated test device for a wellhead under pressure according to claim 2, characterized in that, The fixed base (220) is detachably connected to a simulation test sensor (230) on the side away from the simulation test oil cylinder (210), and the simulation test sensor (230) is used for providing part of data in the simulation test process.

5. The simulated test device for a wellhead operating under pressure according to claim 3, characterized in that, A pipe column fixing portion is arranged in the middle of the side of the fixed base (220) away from the simulation test oil cylinder (210), and the pipe column fixing portion is used for fixing a simulation test pipe column (400).

6. The simulated test device for a wellhead operating under pressure according to claim 4, characterized in that, The side of the simulation test sensor (230) away from the fixed base (220) is further connected to a sealing assembly, the sealing assembly comprises a first sealing portion (240), a sealing barrel (270) is connected to the first sealing portion (240), one end of the sealing barrel (270) is connected to the first sealing portion (240), and the other end of the sealing barrel (270) is connected to the side of the simulation test frame (100) away from the simulation test oil cylinder (210).

7. The simulated test device for a wellhead operating under pressure according to claim 6, characterized in that, A second sealing portion (250) is further arranged in the inner cavity of the sealing barrel (270), and the second sealing portion (250) is connected to the first sealing portion (240).

8. The simulated test device for a wellhead under pressure according to claim 7, characterized in that, A third sealing portion (260) is further arranged in the inner cavity of the sealing barrel (270), and the third sealing portion (260) is connected to the second sealing portion (250).

9. The simulated test device for a wellhead under pressure according to claim 6, characterized in that, An injection pipe (271) is connected to the side wall of the sealing barrel (270), the injection pipe (271) is used for injecting liquid and / or gas into the inner cavity of the sealing barrel (270), the injection pipe (271) is connected to the side wall of the sealing barrel (270) at a position away from the sealing assembly in the sealing barrel (270), and a pressure gauge (272) and an injection valve (273) are further connected to the injection pipe (271).

10. The simulated test device for a wellhead operating under pressure according to claim 9, characterized in that, The simulation test sensor (230) is electrically connected to a control device (600), and the control device (600) is used for acquiring data of the simulation test sensor (230).

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