Seal face precision detection tubing connection detection device

Abstract

The utility model discloses a sealing surface precision detection oil pipe joint detection device, especially in oil pipe joint detection technical field, including support plate, be provided with the flow guide detection subassembly on the support plate, the flow guide detection subassembly includes the first flow guide box of setting in support plate one side, one side of first flow guide box is provided with the second flow guide box. The utility model discloses through pump machine and pressure sensor cooperation, can accurate simulation downhole high pressure environment, and pressure regulation range adapts different specifications oil pipe joint detection demand, solves the problem that the existing device can not restore actual working condition, leads to the detection result and actual use scene disjunction, avoids the problem of the leakage of the detection, the misjudgment caused by the inaccurate simulation of the working condition.

Description

Technical Field

[0001] This utility model relates to the field of oil pipe joint testing technology, and more specifically, to an oil pipe joint testing device for precision testing of sealing surfaces. Background Technology

[0002] Pipe fittings are components used to connect oil pipes, playing a crucial role in hydraulic systems and oil transmission. Common types include flared fittings, compression fittings, and welded fittings. Flared fittings use the flared end of the pipe to create a seal, suitable for connecting thin-walled pipes. Compression fittings use the deformation of a compression fitting to hold the pipe in place and create a seal, suitable for pipeline systems carrying oil, gas, and generally corrosive media. Welded fittings are connected to the pipe by welding and sealed with an O-ring seal, suitable for pipeline systems carrying oil as the medium.

[0003] In fields such as oil and gas extraction, the downhole environment is complex, and tubing joints are subjected to high pressure, high temperature, and corrosive media for a long time. If there are defects, it may lead to leakage and cause safety accidents such as blowouts. Since tubing joints need to bear the weight of the tubing, internal fluid pressure, and mechanical loads, they need to be tested to ensure their good sealing performance. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a precision testing device for sealing surfaces and oil pipe joints, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a precision testing device for sealing surfaces and oil pipe joints, including a support plate, on which a flow guiding and testing component is provided; The flow guiding detection assembly includes a first flow guiding box disposed on one side of the support plate, a second flow guiding box disposed on one side of the first flow guiding box, a first flow guiding connector disposed on the bottom side of the first flow guiding box, and a second flow guiding connector disposed on the bottom side of the second flow guiding box. A flow meter is installed at the bottom of the first flow guide box, and a pressure sensor is installed on the second flow guide box.

[0006] Optionally, in a possible implementation, the top of the first flow guide box is provided with a pressure relief valve for flow regulation, the top of the second flow guide box is provided with an air inlet pipe, a pump is provided on one side of the top of the support plate, one end of the air inlet pipe extends to the pump and is connected to the pump, a processor is provided on one side of the pump, the processor is mounted on the support plate by bolts, the processor is connected to the pump by wires, the second flow guide box and the second flow guide connector are arranged opposite to each other, and a cavity for placing an oil pipe connector is formed between the second flow guide box and the second flow guide connector, both the first flow guide box and the second flow guide box are mounted on the support plate by bolts, and the flow meter and pressure sensor are both connected to the processor by wires; The technical effects and advantages of this utility model are as follows: By working in conjunction with a pump and a pressure sensor, the system can accurately simulate the downhole high-pressure environment. The pressure adjustment range is adapted to the testing needs of different specifications of tubing joints, solving the problem that existing devices cannot reproduce the actual working conditions, resulting in a disconnect between the test results and the actual use scenario. This avoids missed detections and false detections caused by inaccurate simulation of working conditions.

[0007] Simultaneously collect pressure and flow data, and analyze the correlation between the changes of the two in real time through the processor. Compared with single parameter detection, it greatly improves the accuracy of sealing performance judgment and solves the problem of easy misjudgment due to single parameter in traditional detection. Furthermore, the pressure relief valve can automatically release pressure when overpressured, preventing the system from being damaged due to excessive pressure; the pump has a built-in air filter and drying component to prevent moisture and impurities from interfering with detection or damaging precision components, solving the problem of existing devices lacking protection and being prone to equipment failure due to overpressure or impurities, and extending the service life of the device. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0009] Figure 1 This is a front view of the overall structure of this utility model.

[0010] Figure 2 This is a side view of the overall structure of this utility model.

[0011] Figure 3 This is a schematic diagram of the support plate, first flow guide box, second flow guide box, first flow guide connector, flow meter, pressure sensor and processor of this utility model.

[0012] Figure 4 This utility model Figure 3 Exploded view.

[0013] The attached diagram is labeled as follows: 1. Support plate; 2. First flow guide box; 3. Second flow guide box; 4. First flow guide connector; 5. Inlet pipe; 6. Flow meter; 7. Pressure sensor; 8. Pressure relief valve; 9. Second flow guide connector; 10. Pump; 11. Processor. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] This embodiment discloses a precision testing device for tubing joints with sealing surfaces, which aims to solve the problems of low accuracy, complex operation, difficulty in simulating downhole high-pressure environments, and inability to monitor pressure and flow changes in real time in the prior art, resulting in a high risk of missed detection and false detection.

[0016] Specifically, the precision testing device for sealing surfaces and oil pipe joints includes a support plate 1, on which a flow guiding testing component is integrated.

[0017] The flow guiding and detection assembly is the core detection unit of the device, including a first flow guiding box 2, a second flow guiding box 3, a first flow guiding connector 4, a second flow guiding connector 9, a flow meter 6, a pressure sensor 7, a pressure relief valve 8, and an air inlet pipe 5. The specific structure is as follows: First guide box 2 and second guide box 3: Both are rectangular hollow structures, integrally die-cast from aviation aluminum alloy. First guide box 2 and second guide box 3 are symmetrically mounted on support plate 1 by bolts, and second guide box 3 and second guide connector 9 are arranged opposite to each other, forming a cavity between them, which is used to place the oil pipe connector to be tested, such as compression fitting or flared fitting, to ensure the initial seal between the connector to be tested and the guide box, and to avoid testing interference.

[0018] The first flow guide connector 4 and the second flow guide connector 9 are both threaded connectors. The first flow guide connector 4 is welded and fixed to one side of the bottom of the first flow guide box 2 and communicates with the inside of the first flow guide box 2. It is used to discharge the fluid during the testing process. The second flow guide connector 9 is welded and fixed to one side of the bottom of the second flow guide box 3 and communicates with the inside of the second flow guide box 3. The connector core can be replaced according to the specifications of the connector to be tested.

[0019] Flow meter 6: Model LZD-15 is a metal tube float structure. Flow meter 6 is connected to the bottom outlet end of the first flow guide box 2 through a flange. Its signal output end is connected to the processor 11 through a shielded wire. Its core function is to monitor the instantaneous flow rate and cumulative flow rate of the fluid in the first flow guide box 2 in real time. When there is a defect in the sealing surface of the joint to be tested, fluid leakage will cause abnormal changes in flow rate. The flow fluctuation is captured and the data is transmitted to the processor 11.

[0020] Pressure sensor 7: Model PT124G-210 diffused silicon piezoresistive principle, installed on the side of the second flow box 3, its detection end extends into the inside of the second flow box 3 and is in direct contact with the fluid. Its core function is to collect the pressure value in the second flow box 3 in real time, simulate the downhole high pressure condition, and transmit the pressure data synchronously to the processor 11. When the pressure drops suddenly or continues to drop, it can be determined that the joint under test has a sealing failure.

[0021] Pressure relief valve 8: A spring-loaded micro-opening safety valve of model A28H-16C. Pressure relief valve 8 is installed on the top of the first flow guide box 2 and is connected to the inside of the first flow guide box 2. Its core function is to regulate the pressure inside the first flow guide box 2. When the system pressure exceeds the set threshold, pressure relief valve 8 automatically opens to relieve pressure and prevent the first flow guide box 2 from being damaged due to overpressure. At the same time, the flow rate can be finely adjusted by manually adjusting the valve opening to meet the testing needs of different specifications of oil pipe joints.

[0022] Air inlet pipe 5: It is connected to the air inlet at the top of the second guide box 3 via a quick-connect fitting, and the other end extends to the air outlet of the pump 10 and is connected by a threaded seal. Its core function is to deliver the compressed air generated by the pump 10 to the second guide box 3 to provide a high-pressure air source for testing.

[0023] Pump 10, a screw air compressor model GA-55VSD, is fixed to the top side of the support plate 1 with anchor bolts. Its control terminal is connected to the processor 11 via wires. Its core function is to output compressed air at a stable pressure according to the instructions of the processor 11, and inject it into the second guide box 3 through the air inlet pipe 5 to simulate the high-pressure environment downhole and provide a power source for sealing performance testing. At the same time, pump 10 has a built-in air filter and dryer to remove moisture and impurities from the compressed air, avoiding interference with the test results or damage to precision components such as the pressure sensor 7.

[0024] The processor 11 is a Siemens PLC controller with the model S7-1200 CPU 1214C. The processor 11 is mounted on the top of the support plate 1 on the side close to the pump 10 by bolts. Its core function is receiving data transmitted by the flowmeter 6 and the pressure sensor 7 through the analog input module, converting the analog signals into digital signals and storing the data in real time. According to a preset detection program, that is, a three-stage detection process consisting of pressure boosting, pressure holding and pressure reducing, the processor 11 sends control instructions to the pump 10 to adjust the start / stop and output pressure of the pump 10; meanwhile, it monitors the working status of the pressure relief valve 8, and controls the pressure relief valve 8 to open for pressure relief when the system pressure is abnormal.

[0025] The processor 11 can be externally connected with a touch screen, through which detection parameters can be set, such as target pressure, pressure holding time, flow threshold, starting / stopping the detection program, viewing real-time detection data, pressure curves, flow curves and historical detection records. When it is detected that the oil pipe joint is unqualified in sealing, a red warning box will pop up on the touch screen and display the reason for unqualification.

[0026] The specific working principle is as follows: an operator places a to-be-detected oil pipe joint, for example, a ferrule type pipe joint with the model GB / T 3733-2008, in the cavity between the second diversion box 3 and the second diversion joint 9, ensures that both ends of the joint are closely attached to the elastic sealing gaskets on the inner wall of the cavity, then starts the detection program through the touch screen, and sets the target detection pressure, pressure holding time and qualified flow threshold on the touch screen.

[0027] Pressure boosting stage: the processor 11 sends a start instruction to the pump 10, the pump 10 starts working, outputs compressed air, and delivers the compressed air into the second diversion box 3 through the air inlet pipe 5. Meanwhile, the pressure sensor 7 collects the pressure value in the second diversion box 3 in real time and transmits the data to the processor 11. The processor 11 adjusts the rotating speed of the variable frequency motor of the pump 10 according to the feedback data from the pressure sensor 7, so that the pressure in the second diversion box 3 slowly rises to the set target pressure, which avoids impact damage to the to-be-detected joint caused by too fast pressure boosting.

[0028] Pressure holding detection stage: when the pressure in the second diversion box 3 reaches the target pressure, the processor 11 controls the pump 10 to enter the pressure holding mode to maintain stable pressure. In this stage, the pressure sensor 7 continuously monitors the pressure change. If the pressure does not drop within the pressure holding time, the pressure index is determined to be qualified; meanwhile, the flowmeter 6 monitors the flow change in the first diversion box 2 in real time. If the flow value is always within a certain range, the flow index is determined to be qualified. If the pressure drops or the flow value exceeds the threshold, the processor 11 immediately triggers an audible and visual alarm, displays the unqualified information on the touch screen, and records abnormal data points such as the moment of sudden pressure drop and the corresponding flow value.

[0029] Depressurization Phase: After the pressure holding test is completed, if the oil pipe joint sealing performance is qualified, the processor 11 controls the pump 10 to stop working and simultaneously controls the pressure relief valve 8 to open, slowly releasing the pressure in the first guide box 2 and the second guide box 3 to atmospheric pressure, avoiding negative pressure in the system due to excessively rapid depressurization. After depressurization is completed, the operator can remove the qualified oil pipe joint and proceed to the next joint for testing; if the test fails, the operator can check the sealing surface of the oil pipe joint according to the abnormal information displayed on the touch screen, such as whether there are scratches, deformation, or damage to the sealing ring, and after repair, the test can be repeated.

[0030] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A precision testing device for sealing surfaces of oil pipe joints, comprising a support plate (1), characterized in that: A flow guiding detection component is provided on the support plate (1); The flow guiding detection component includes a first flow guiding box (2) disposed on one side of the support plate (1), a second flow guiding box (3) disposed on one side of the first flow guiding box (2), a first flow guiding connector (4) disposed on one side of the bottom of the first flow guiding box (2), and a second flow guiding connector (9) disposed on one side of the bottom of the second flow guiding box (3). A flow meter (6) is installed at the bottom of the first flow guide box (2), and a pressure sensor (7) is installed on the second flow guide box (3).

2. The precision testing device for sealing surfaces and oil pipe joints according to claim 1, characterized in that: The top of the first flow guide box (2) is provided with a pressure relief valve (8) for flow regulation, and the top of the second flow guide box (3) is provided with an air inlet pipe (5).

3. The precision testing device for sealing surfaces and oil pipe joints according to claim 2, characterized in that: A pump (10) is provided on one side of the top of the support plate (1), and one end of the air inlet pipe (5) extends to the pump (10) and is connected to the pump (10).

4. The precision testing device for sealing surfaces and oil pipe joints according to claim 3, characterized in that: A processor (11) is provided on one side of the pump (10). The processor (11) is mounted on the support plate (1) by bolts. The processor (11) is connected to the pump (10) by wires.

5. The precision testing device for sealing surfaces and oil pipe joints according to claim 1, characterized in that: The second flow guide box (3) and the second flow guide joint (9) are arranged opposite to each other, and a cavity for placing the oil pipe joint is formed between the second flow guide box (3) and the second flow guide joint (9).

6. The precision testing device for sealing surfaces and oil pipe joints according to claim 4, characterized in that: The first flow guide box (2) and the second flow guide box (3) are both mounted on the support plate (1) by bolts, and the flow meter (6) and the pressure sensor (7) are both connected to the processor (11) by wires.

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