Impact load joint airtightness detection equipment

Abstract

The utility model discloses an air tightness detection device for an impact load joint, which is used for testing the sealing performance of a joint under an impact load, and comprises a frame body, a double-seal blocking assembly, a high-pressure air source, a jar, an outer sealing sleeve and an air tightness detection assembly, the joint is arranged on the sleeve; the double-seal blocking assembly extends into the sleeve and seals the upper portion and the lower portion of the inner side of the threaded connection position of the sleeve connector in the axial direction, and a sealed cavity is formed between the double-seal blocking assembly and an inner cavity of the sleeve. The high-pressure gas source is communicated with the sealing cavity through a pipeline, and the high-pressure gas source is suitable for filling high-pressure gas into the sealing cavity; and the jar is installed on the frame body and located above the casing pipe, an impact end is arranged on the jar, and the jar is suitable for applying a downward impact load to the casing pipe through the impact end. According to the utility model, the airtight performance of the sleeve joint under the condition of bearing different impact loads can be tested.

Description

Technical Field

[0001] This utility model relates to an airtightness testing device for impact load joints, belonging to the technical field of testing equipment. Background Technology

[0002] Currently, with the depletion of proven reserves of conventional oil and gas resources, oil and gas extraction is increasingly focusing on unconventional resources. To better adapt to the extraction of unconventional resources such as shale gas, tight gas, and coalbed methane, drilling and production processes and wellbore design have also changed. The continuous promotion of exploration technologies such as ultra-deep wells and horizontal wells, and the extensive application of reservoir stimulation technologies such as acidizing and fracturing, have resulted in wellhead pressures generally exceeding 50 MPa, and even reaching nearly 100 MPa. Therefore, oil and gas fields are placing higher demands on the sealing performance and operational capabilities of casing and tubing used in the field.

[0003] After searching the existing technology, Chinese patent CN203241204U was found to disclose a tool for testing the gas tightness of threaded connections. This patent uses a gas tightness testing method. Theoretically, this tool can be used to verify the sealing performance of oil casing under actual working conditions, such as various influences during transportation or operation, including environmental factors such as micro-corrosion, the selection and use of sealing grease, the tightening torque, and the cleanliness of the threads and sealing surfaces, or operational factors such as unreasonable tightening torque during the installation of oil casing.

[0004] However, in practical applications, the wellbore trajectories of widely used ultra-long horizontal wells are more complex than those of vertical wells, characterized by long inclined depths, long open hole sections, and long horizontal sections. This makes the casing prone to increased resistance or sudden obstruction during running, leading to stuck pipe problems. Typically, rotating the casing or using a shock absorber is used to resolve these issues. The shock absorber releases the stuck pipe by applying a downward impact load, but this instantaneous impact load can adversely affect the sealing of the joints. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an impact load joint air tightness testing device, which can test the air tightness performance of the sleeve joint under different impact loads.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: an impact load joint airtightness testing device, used to test the sealing performance of a joint under impact load, comprising:

[0007] A frame; a sleeve is snapped onto the frame, and the connector is disposed on the sleeve;

[0008] A double-sealing barrier assembly extends into the sleeve and seals both the upper and lower axial portions inside the threaded connection of the sleeve joint, forming a sealed chamber between the double-sealing barrier assembly and the inner cavity of the sleeve.

[0009] A high-pressure gas source is connected to the sealed chamber via a pipeline, and the high-pressure gas source is adapted to fill the sealed chamber with high-pressure gas.

[0010] A shock absorber is mounted on the frame above the sleeve, and the shock absorber is provided with an impact end. The shock absorber is adapted to apply a downward impact load to the sleeve through the impact end.

[0011] An outer sealing sleeve is provided, which seals and covers the threaded connection of the sleeve joint, and an annular sealing cavity is formed between the outer sealing sleeve and the outer wall of the threaded connection of the sleeve joint.

[0012] An airtightness testing component is provided with a testing probe that extends into the annular sealing cavity.

[0013] Furthermore, a specific structure of a frame is provided, the frame comprising:

[0014] A base, wherein the base is provided with a mounting groove suitable for fixing the sleeve, and the sleeve is inserted into the mounting groove;

[0015] A vertical support frame, which is mounted on the base;

[0016] A shock absorber support component is horizontally installed on the upper inner side of the vertical support frame;

[0017] The shock absorber is fixed to the shock absorber support member.

[0018] Furthermore, a specific structure for a lifting component is provided, wherein the lifting component is disposed on the vertical support frame, and the lifting component includes:

[0019] A pulley block, which is fixedly installed on the top of the vertical support frame;

[0020] A traction mechanism, which is mounted on the base;

[0021] A steel wire rope, one end of which is connected to the traction mechanism, and the other end extends downward after passing through the pulley block;

[0022] A lifting connector is installed on the other end of the wire rope and is adapted to connect the double-sealed barrier assembly or the sleeve.

[0023] Furthermore, a specific type of high-pressure gas source is provided, wherein the high-pressure gas source is a helium source.

[0024] Furthermore, the airtightness detection component includes a helium detector, which is mounted on the frame, and the detection probe is connected to the helium detector via a pipeline.

[0025] Furthermore, the casing connector is an API threaded oil casing connector.

[0026] Furthermore, the dual-sealing barrier assembly includes:

[0027] Upper packer and lower packer, wherein:

[0028] The upper packer is disposed inside the sleeve, above the threaded connection of the joint;

[0029] The lower packer is disposed inside the sleeve, located below the threaded connection of the joint;

[0030] The upper packer and the lower packer are in sealing contact with the inner wall of the sleeve, together forming the sealed chamber.

[0031] By adopting the above technical solution, this utility model has the following beneficial effects:

[0032] In this invention, firstly, double-sealing barrier components are installed on the upper and lower sides inside the threaded connection of the sleeve joint, forming a sealed chamber between the double-sealing barrier components 2 and the inside of the threaded connection of the sleeve joint. Next, an outer sealing sleeve is used to cover the outside of the threaded connection of the sleeve joint, forming an annular sealed cavity outside the threaded connection of the sleeve joint, and the detection probe of the airtightness testing component is inserted into the annular sealed cavity. Subsequently, high-pressure gas is injected into the sealed cavity from a high-pressure gas source through a pipeline, and airtightness is tested through the detection probe of the airtightness testing component. Simultaneously, a vibrator applies a downward impact load to the sleeve through its impact end, simulating the impact conditions that the joint may suffer under actual working conditions. The entire process realizes the airtightness testing of the joint under impact load and ensures the accuracy and reliability of the test results.

[0033] Furthermore, using a helium source as both the high-pressure gas source and the detection medium not only provides high sensitivity and penetration performance but also significantly improves detection accuracy. The lifting assembly on the frame, along with the pulley system and traction mechanism, facilitates the operation of the sleeve and other components, greatly simplifying the testing process and improving testing efficiency.

[0034] In summary, this invention not only enables accurate airtightness testing under simulated actual working conditions, but also has advantages such as convenient operation, high detection sensitivity, and wide applicability. It is suitable for evaluating the airtightness performance of API threaded oil casing joints under different impact loads. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the impact load joint airtightness testing equipment of this utility model. Detailed Implementation

[0036] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0037] like Figure 1 As shown, an impact load joint airtightness testing device is used to test the sealing performance of a joint under impact load, comprising:

[0038] The frame has a sleeve 1 attached to it, and the connector is set on the sleeve 1.

[0039] The double-sealing barrier component 2 extends into the sleeve 1 and seals the upper and lower axial parts on the inner side of the threaded connection of the sleeve 1 joint, forming a sealed chamber between the double-sealing barrier component 2 and the inner cavity of the sleeve 1.

[0040] A high-pressure gas source is connected to a sealed chamber via a pipeline. The high-pressure gas source is suitable for filling the sealed chamber with high-pressure gas.

[0041] The shock absorber 3 is mounted on the frame and located above the sleeve 1. The shock absorber 3 is provided with an impact end and is adapted to apply a downward impact load to the sleeve 1 through the impact end.

[0042] The outer sealing sleeve 4 seals and covers the threaded connection of the joint of the sleeve 1, and an annular sealing cavity is formed between the outer sealing sleeve 4 and the outer wall of the threaded connection of the joint of the sleeve 1.

[0043] The airtightness testing component 5 is equipped with a testing probe 51, which extends into the annular sealing cavity.

[0044] In this embodiment, as Figure 1As shown, firstly, double-sealing barrier components 2 are installed on the upper and lower sides inside the threaded connection of the sleeve 1 joint, forming a sealed chamber between the double-sealing barrier components 2 and the inside of the threaded connection of the sleeve 1 joint. Next, an outer sealing sleeve 4 is used to cover the outside of the threaded connection of the sleeve 1 joint, forming an annular sealed chamber outside the threaded connection of the sleeve 1 joint. The detection probe 51 of the airtightness detection component 5 is then inserted into the annular sealed chamber. Subsequently, high-pressure gas is injected into the sealed chamber from a high-pressure gas source through a pipeline, and airtightness is tested through the detection probe 51 of the airtightness detection component 5. Simultaneously, the shock absorber 3 applies a downward impact load to the sleeve 1 through its impact end, simulating the impact conditions that the joint may suffer in actual working conditions. The entire process realizes the airtightness detection of the joint under impact load and ensures the accuracy and reliability of the test results. The shock absorber 3 is existing technology and will not be described in detail in this embodiment.

[0045] Specifically, such as Figure 1 As shown, the frame includes:

[0046] The base 61 has a mounting groove suitable for fixing the sleeve 1, and the sleeve 1 is inserted into the mounting groove.

[0047] Vertical support frame 62 is mounted on base 61;

[0048] Shock absorber support member 63 is horizontally installed on the upper side of the interior of the vertical support frame 62;

[0049] The shock absorber 3 is fixed on the shock absorber support member 63.

[0050] In this embodiment, as Figure 1 As shown, the vibrator 3 is mounted on the vertical support frame 62 via the vibrator support member 63, facilitating adjustment and maintenance by operators. Furthermore, a vibration damping pad can be installed at the bottom of the base 61 to further reduce the impact of vibrations generated during testing on the surrounding environment. To accommodate different specifications of sleeves 1, a mounting groove with a mating sleeve can be used to accommodate a range of sleeves 1. The mating sleeve is fitted onto one end of the sleeve 1, and then the sleeve 1 with the mating sleeve is inserted into the mounting groove.

[0051] Specifically, such as Figure 1 As shown, a lifting assembly 7 is provided on the vertical support frame 62. The lifting assembly 7 includes:

[0052] A pulley block is fixedly installed on the top of the vertical support frame 62;

[0053] A traction mechanism is mounted on a base 61.

[0054] The wire rope has one end connected to the traction mechanism and the other end extending downwards after passing through the pulley block.

[0055] The lifting connector is installed on the other end of the wire rope and is suitable for connecting the double-sealed barrier assembly or sleeve 1.

[0056] In this embodiment, as Figure 1 As shown, the lifting assembly 7 facilitates the installation of the double-sealing barrier assembly 2 into the sleeve 1. The pulley system reduces the force required during lifting. The traction mechanism is mounted on the base 61 for easy control and maintenance by operators. The traction mechanism can be a winch, and the lifting assembly 7 can also be used to lift the sleeve 1 or the outer sealing sleeve 4.

[0057] Specifically, the high-pressure gas source is a helium source.

[0058] Specifically, such as Figure 1 As shown, the airtightness testing component 5 includes a helium detector, which is mounted on the frame, and the testing probe is connected to the helium detector through a pipeline.

[0059] In this embodiment, as Figure 1 As shown, using helium as a high-pressure gas source has several advantages. Helium molecules are small and have strong penetrating power, allowing them to seep into even the smallest cracks or defects, which helps improve the sensitivity and accuracy of detection. At the same time, helium is chemically stable and does not easily react with the components being tested, ensuring the safety and reliability of the detection process. Specifically, the helium detector is a high-sensitivity detector.

[0060] Specifically, such as Figure 1 As shown, the connector of the casing 1 is an API threaded oil casing connector, which can be a coupling connector. The connector includes a coupling and casings 1 on both sides. The casings 1 on both sides are threadedly connected to the coupling to form a threaded connection. This is the prior art and will not be described in detail in this embodiment.

[0061] In this embodiment, as Figure 1 As shown, the joint of casing 1 adopts a special sealing coupling design, which features a unique sealing structure and connection method. Special sealing couplings typically offer higher sealing performance and pressure resistance, maintaining a good sealing effect in complex underground environments. The use of this type of coupling helps improve the reliability of casing connections and reduce leakage risks, making it particularly suitable for oil and gas extraction operations in high-pressure, high-temperature, or corrosive environments.

[0062] Specifically, such as Figure 1 As shown, the dual-sealing barrier assembly 2 includes:

[0063] Upper packer and lower packer, wherein:

[0064] The upper packer is located inside sleeve 1, above the inner side of the threaded connection of the joint;

[0065] The lower packer is located inside the sleeve 1, below the inner side of the threaded connection of the joint;

[0066] The upper and lower packers are in sealing contact with the inner wall of the sleeve 1, forming a sealed chamber together.

[0067] In this embodiment, as Figure 1 As shown, firstly, the lower packer is hoisted into the casing 1 from above using the lifting assembly 7. It is then spread open below the inner side of the threaded connection of the joint, locking the inner wall of the casing 1. Next, the upper packer is hoisted into the casing 1 using the lifting assembly 7. It is then spread open above the inner side of the threaded connection of the joint, locking the inner wall of the casing 1. The upper and lower packers form a sealed chamber between the inner wall of the casing 1 and the inner cavity of the casing 1 through setting. Then, high-pressure helium is injected into this chamber. The annular sealed chamber is then detected using a detection probe of a high-sensitivity detector. If a helium leak triggers an alarm, it indicates that the gas seal is not qualified.

[0068] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An impact load joint airtightness testing device, used to test the sealing performance of a joint under impact load, characterized in that, include: A frame, on which a sleeve (1) is snapped, and the connector is disposed on the sleeve (1); A double-sealing barrier assembly (2) extends into the sleeve (1) and seals the upper and lower axial parts on the inner side of the threaded connection of the sleeve (1) joint. A sealed chamber is formed between the double-sealing barrier assembly (2) and the inner cavity of the sleeve (1). A high-pressure gas source is connected to the sealed chamber via a pipeline, and the high-pressure gas source is adapted to fill the sealed chamber with high-pressure gas. Shocker (3), the shocker (3) is installed on the frame and located above the sleeve (1), the shocker (3) is provided with an impact end, the shocker (3) is adapted to apply a downward impact load to the sleeve (1) through the impact end; An outer sealing sleeve (4) is provided, which seals and covers the threaded connection of the joint of the sleeve (1), and an annular sealing cavity is formed between the outer sealing sleeve (4) and the outer wall of the threaded connection of the joint of the sleeve (1). An airtightness testing component (5) is provided with a testing probe (51) which extends into the annular sealing cavity.

2. The impact load joint airtightness testing equipment according to claim 1, characterized in that, The frame includes: A base (61) is provided with a mounting groove suitable for fixing the sleeve (1), and the sleeve (1) is inserted into the mounting groove; A vertical support frame (62) is mounted on the base (61); Shock absorber support member (63), which is horizontally installed on the upper side of the interior of the vertical support frame (62); The shock absorber (3) is fixed on the shock absorber support member (63).

3. The impact load joint airtightness testing equipment according to claim 2, characterized in that, The vertical support frame (62) is provided with a lifting assembly (7), the lifting assembly (7) comprising: A pulley block, which is fixedly installed on the top of the vertical support frame (62); A traction mechanism, which is mounted on the base (61); A steel wire rope, one end of which is connected to the traction mechanism, and the other end extends downward after passing through the pulley block; A lifting connector is installed on the other end of the wire rope and is adapted to connect the double-sealed barrier assembly or the sleeve (1).

4. The impact load joint airtightness testing equipment according to claim 1, characterized in that, The high-pressure gas source is a helium source.

5. The impact load joint airtightness testing equipment according to claim 1, characterized in that, The airtightness testing component (5) includes a helium detector, which is mounted on the frame, and the testing probe is connected to the helium detector via a pipeline.

6. The impact load joint airtightness testing equipment according to claim 1, characterized in that, The fitting of the casing (1) is an API threaded oil casing fitting.

7. The impact load joint airtightness testing equipment according to claim 1, characterized in that, The dual-sealing barrier assembly (2) includes: an upper packer and a lower packer, wherein: The upper packer is disposed inside the sleeve (1), located above the inner side of the threaded connection of the joint; The lower packer is disposed inside the sleeve (1), located below the inner side of the threaded connection of the joint; The upper packer and the lower packer are in sealing contact with the inner wall of the sleeve (1) to form the sealed chamber.

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