Hydraulic setting detection device and method

Abstract

The invention discloses a hydraulic setting detection device and method. The hydraulic setting detection device comprises a supporting sleeve and an oil cylinder. A front oil cylinder cover and an oil cylinder rear cover are respectively mounted at two ends of the oil cylinder; one end of the supporting sleeve is connected with the front oil cylinder cover, and the piston is arranged in the front oil cylinder cover for sealing and sliding connection; the supporting sleeve is used for being connected with the push cylinder, the connecting screw rod is installed in the supporting sleeve, and the connecting screw rod is connected with the piston; a sealing cover plate is installed at the end of the piston, and a cavity is formed in the piston. A gap is formed between the outside of the piston and the oil cylinder; a through hole is formed in the side wall of the piston; an oil guide plunger is arranged in a cavity of the piston; a through hole is formed in the oil guide plunger, and one end of the through hole is communicated with a laboratory high-pressure pipeline; the other end of the through hole communicates with an inner cavity of the piston; the oil cylinder rear cover is provided with a through hole communicated with a laboratory high-pressure pipeline. High-pressure liquid acts on the piston to generate stable thrust, and then the bridge plug / ball seat is driven by the connecting screw rod to complete setting and releasing.

Description

Technical Field

[0001] The invention belongs to the technical field of downhole tool detection, and in particular to a hydraulic setting detection device and method. Background Art

[0002] In the existing technology, with the large-scale application of ultra-low permeability and shale oil horizontal wells, the process technology concept has been continuously developed, and the horizontal well has realized the transformation from single-stage single-slit fracturing to multi-stage volume fracturing. In order to improve the fracturing efficiency and reduce the fracturing cost, with the goal of pursuing the same diameter, unlimited stages and large displacement, the current horizontal well staged fracturing tools mainly rely on bridge plugs or soluble ball seats to achieve unlimited stage volume fracturing.

[0003] The common bridge plug / ball seat setting test method generally uses a gunpowder setting tool, which has a complicated setting procedure and can only be performed in a specific outdoor venue. This method has the following main problems:

[0004] 1. The gunpowder column of the gunpowder setting tool is a non-standard part and needs to be customized. Therefore, the thrust generated by the combustion of the gunpowder column is not stable enough and is greatly affected by the workers' technical level and mold;

[0005] 2. Gunpowder is a controlled item, and the transportation approval procedures are complicated. The custom processing cycle is long, and it cannot be produced and stored in large quantities, which makes it difficult to flexibly organize testing;

[0006] 3. The cost of the gunpowder column is high, which increases the cost of the setting tool;

[0007] 4. The use of gunpowder produces a lot of gunpowder combustion residues, which are very sticky and difficult to clean. It is also inconvenient to release and recover the seal.

[0008] The above shortcomings limit the use of gunpowder setting tools in indoor testing experiments, so that the bridge plug / ball seat setting test requires full-time personnel to use gunpowder setting tools to perform setting tests, which is time-consuming and labor-intensive and is also not conducive to the factory inspection of the ball seat.

[0009] In summary, the bridge plug / ball seat setting detection method in the prior art has the disadvantages of long detection time and high cost. Summary of the invention

[0010] In order to solve the problems existing in the prior art, the present invention provides a hydraulic setting detection device and method, which generates a stable thrust by high-pressure liquid on the piston, and then drives the bridge plug / ball seat to complete the setting and release through the connecting screw. The present invention has the advantages of simple structure, reliable operation, low cost, and easy operation, and does not require special tools such as gunpowder, which solves the shortcomings of long time and high cost of bridge plug / ball seat setting detection. The flexibility of bridge plug / ball seat setting detection is greatly improved.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A hydraulic setting detection device comprises a support sleeve, a connecting screw, a piston, a front oil cylinder cover, an oil cylinder, an oil guide plunger, a sealing cover plate, and an oil cylinder rear cover;

[0013] The two ends of the oil cylinder are respectively installed with a front oil cylinder cover and a rear oil cylinder cover; one end of the support sleeve is connected to the front oil cylinder cover, and the piston is arranged inside the front oil cylinder cover for sealing and sliding connection;

[0014] The support sleeve is used to connect with the push cylinder, and a connecting screw is installed inside the support sleeve, and the connecting screw is connected with the piston;

[0015] A sealing cover plate is installed at the end of the piston, and a cavity is arranged inside the piston; a gap is arranged between the outside of the piston and the oil cylinder, and a through hole is arranged on the side wall of the piston;

[0016] An oil guide plunger is arranged inside the cavity of the piston, and the oil guide plunger is sealed and slidably connected with the sealing cover plate; a through hole is arranged inside the oil guide plunger, one end of the through hole is connected to the laboratory high-pressure pipeline; the other end of the through hole is connected to the inner cavity of the piston; a through hole is arranged on the rear cover of the oil cylinder to connect to the laboratory high-pressure pipeline.

[0017] Preferably, the sealing cover plate is fixed to the end of the piston by means of hexagon socket bolts.

[0018] Preferably, the support sleeve and the front cylinder cover are fixedly connected via threads.

[0019] Preferably, a first O-ring is installed on the contact surface between the piston and the front cylinder cover for sealing.

[0020] Preferably, a second O-ring is installed on the contact surface between the oil cylinder and the front oil cylinder cover for sealing.

[0021] Preferably, a third O-ring is installed on the contact surface between the sealing cover plate and the piston for sealing.

[0022] Preferably, a fourth O-ring is installed on the contact surface between the oil guide plunger and the rear cover of the oil cylinder for sealing.

[0023] Preferably, a threaded buckle is provided at the upper end of the connecting screw, which is connected to the bridge plug or the ball seat through a conversion joint with a nut and is pressed and fixed with the push cylinder.

[0024] A hydraulic setting detection method, characterized in that, based on any one of the above-mentioned hydraulic setting detection devices, the method comprises the following steps:

[0025] Connect the push tube to the support sleeve, connect the center tube of the experimental bridge plug to the connecting screw through the conversion joint, and put it into the casing after the connection;

[0026] The B port of the oil guide plunger is connected to the laboratory high-pressure pipeline. The laboratory high-pressure pump injects high-pressure liquid into the cylinder through the high-pressure pipeline to push the piston to operate. The piston drives the connecting screw and the bridge plug center tube to move axially, and the bridge plug is in close contact with the push cylinder. The bridge plug center tube and the body move relatively to complete the setting and release of the bridge plug / ball seat. The bridge plug is set and released in the casing, and the success rate of the bridge plug setting and release is tested.

[0027] Check whether the setting status of the bridge plug meets the design requirements, so as to facilitate the next step of pressure testing after the bridge plug is set.

[0028] Preferably, the A port of the oil cylinder rear cover is connected to the laboratory high-pressure pipeline. The laboratory high-pressure pump injects high-pressure liquid into the oil cylinder through the high-pressure pipeline to push the piston to run. The piston drives the connecting screw to run, and the hydraulic sealing detection device returns to the position before startup for the next test.

[0029] Compared with the prior art, the present invention has the following beneficial technical effects:

[0030] The present invention provides a hydraulic sealing detection device, which generates a stable thrust through the action of high-pressure liquid on the piston, and then drives the bridge plug / ball seat to complete the sealing and releasing through the connecting screw. It has the advantages of simple structure, reliable operation, low cost, and easy operation, and does not require special tools such as gunpowder, which greatly improves the flexibility of bridge plug / ball seat sealing detection. It is used for indoor sealing and releasing performance detection and evaluation experiments of bridge plugs / ball seats. It solves the shortcomings of long time and high cost of bridge plug / ball seat sealing detection. It can be connected to any laboratory high-pressure pump through a high-pressure pipeline, and the high-pressure liquid of the experiment can be oil or water, which is convenient for laboratory indoor environment detection. The detection device of the present invention is low in cost, easy to store, transport and recycle, and has versatility, which meets the needs of batch and large-scale detection of bridge plugs / ball seats of staged fracturing tools in the bridge-shooting joint operation process.

[0031] The bridge plug / ball seat hydraulic setting detection device of the present invention has the performance of similar gunpowder setting tools used in oil and gas fields, and has low processing cost, which can greatly reduce the cost of detection tools and has great advantages for the economical and effective development of low permeability and tight oil and gas reservoirs; the setting detection device adopts a hydraulic setting mechanism with a simple structure and stable setting force. Unlike gunpowder, there is no need to adjust the gunpowder column according to different tools, which can effectively improve the adaptability of the setting detection tool to bridge plugs and ball seats of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the hydraulic sealing detection device before startup.

[0033] Figure 2 It is a schematic diagram of the structure of the hydraulic sealing detection device after startup.

[0034] Figure 3 It is a schematic diagram of the push cylinder structure.

[0035] In the accompanying drawings: 1 is a support sleeve; 2 is a connecting screw; 3 is a piston; 4 is a front cylinder cover; 5 is a first O-ring; 6 is a second O-ring; 7 is a cylinder; 8 is an oil guide plunger; 9 is a third O-ring; 10 is a hexagon socket bolt; 11 is a sealing cover plate; 12 is a cylinder rear cover; 13 is a fourth O-ring; 14 is a nut. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0037] A hydraulic sealing detection device according to an embodiment of the present invention includes a support sleeve 1, a connecting screw 2, a piston 3, a front cylinder cover 4, a first O-ring 5, a second O-ring 6, a cylinder 7, an oil guide plunger 8, a third O-ring 9, a hexagon socket bolt 10, a sealing cover plate 11, a cylinder rear cover 12, a fourth O-ring 13, and a nut 14.

[0038] The support sleeve 1 is connected to the push cylinder, and a connecting screw 2 is installed inside the support sleeve 1, and the connecting screw 2 is connected to the piston 3; a threaded buckle is provided on the upper end of the connecting screw 2, which is connected to the bridge plug or the ball seat by a conversion joint and is pressed and fixed to the push cylinder.

[0039] The front cylinder cover 4 and the cylinder rear cover 12 are respectively installed at both ends of the cylinder 7; one end of the support sleeve 1 is connected to the front cylinder cover 4, and the piston 3 is arranged inside the front cylinder cover 4 for sealed sliding connection; the sealing cover plate 11 is installed and fixed to the end of the piston 3 by the hexagon socket bolt 10.

[0040] A first O-ring 5 is installed on the contact surface between the piston 3 and the front oil cylinder cover 4 for sealing. A second O-ring 6 is installed on the contact surface between the oil cylinder 7 and the front oil cylinder cover 4 for sealing. A third O-ring 9 is installed on the contact surface between the sealing cover plate 11 and the piston 3 for sealing. A fourth O-ring 13 is installed on the contact surface between the oil guide plunger 8 and the oil cylinder rear cover 12 for sealing.

[0041] The B port of the oil guide plunger 8 is connected to the laboratory high-pressure pipeline. The laboratory high-pressure pump injects high-pressure liquid into the oil cylinder through the high-pressure pipeline to push the piston 3 to run. The piston 3 drives the connecting screw 2 and the center tube of the bridge plug / ball seat to move axially, and the bridge plug / ball seat body is in close contact with the push cylinder, causing the center tube and the body to move relative to each other, thereby completing the sealing and releasing of the bridge plug / ball seat.

[0042] After the above-mentioned hydraulic sealing detection device is connected to the bridge plug / ball seat, it can be placed in the casing of the corresponding specifications in advance according to the specifications of the bridge plug and the ball seat. After the sealing is completed, it can be directly sealed in the casing to facilitate the next step of pressure bearing test after the bridge plug / ball seat is set.

[0043] The hydraulic setting detection device has a setting stroke of 200mm and a maximum setting tension of 10,000kg. It can be connected to bridge plugs and ball seats of different specifications by replacing push tubes and conversion joints of different specifications, so as to use various bridge plugs and ball seats for setting and release detection.

[0044] The above-mentioned hydraulic sealing detection device can be connected to any laboratory high-pressure pump through a high-pressure pipeline. The high-pressure liquid in the experiment can be oil or water, which is convenient for laboratory indoor environment detection.

[0045] The bridge plug / ball seat hydraulic setting detection device of the present invention has the performance of similar gunpowder setting tools used in oil and gas fields; and the setting detection device has low processing cost, which can greatly reduce the cost of detection tools, and has great advantages for the economical and effective development of low-permeability dense oil and gas reservoirs.

[0046] The setting detection device of the present invention adopts a hydraulic setting mechanism with a simple structure and stable setting force. It does not need to adjust the gunpowder column according to different tools like gunpowder, and can effectively improve the adaptability of the setting detection tool to bridge plugs and ball seats of different specifications.

[0047] Gunpowder columns are dangerous items commonly used in bridge shooting operations. They are inconvenient to store, transport and use. They can only be carried out in specific outdoor locations and require dedicated personnel to use gunpowder setting tools for setting tests. The setting test tool only requires technicians to complete the test at any time in the laboratory, making it easier for technicians to organize tests flexibly.

[0048] After the gunpowder setting tool is set, it needs to be cleaned and recycled immediately on site for reuse to reduce costs. However, a large amount of sticky and hard residue is produced when the gunpowder column burns, which is very difficult to clean and takes a long time. The hydraulic setting detection device can be directly reused and is more convenient to recycle.

[0049] Embodiment 1:

[0050] In order to simplify the current bridge plug / ball seat setting detection and evaluation method, thereby improving the reliability of bridge plug / ball seat setting, this embodiment provides a Figure 1 , Figure 2 , Figure 3The hydraulic setting detection device shown in the figure includes a support sleeve 1, a connecting screw 2, a piston 3, a front oil cylinder cover 4, an O-ring 5, an O-ring 6, an oil cylinder 7, an oil guide plunger 8, an O-ring 9, a hexagon socket bolt 10, a sealing cover plate 11, an oil cylinder rear cover 12, an O-ring 13, and a nut 14. Its maximum outer diameter is 80mm; the maximum setting stroke is 200mm, and the maximum setting tension is 10000kg.

[0051] Support sleeve 1 and push cylinder Figure 3 The upper end of the connecting screw 2 has a threaded buckle, which is connected to the bridge plug or ball seat with a conversion joint and pressed and fixed with the push tube. The oil guide plunger 8B port is connected to the laboratory high-pressure pipeline. The laboratory high-pressure pump injects high-pressure liquid into the cylinder 7 through the high-pressure pipeline to push the piston 3 to operate. The piston drives the connecting screw 2 and the center tube of the bridge plug / ball seat to move axially, and the bridge plug / ball seat body and the push tube Figure 3 The close contact causes the center tube of the bridge plug / ball seat to move relative to the body, thereby completing the setting and releasing of the bridge plug / ball seat.

[0052] Embodiment 2:

[0053] On the basis of Example 1, this example takes an experiment of setting and releasing a bridge plug in a casing with an inner diameter of Φ124.3 mm as an example to further explain the present invention in detail. The specific experimental method and steps are as follows:

[0054] The first step is to connect the push tube to Figure 1 On the support sleeve 1, connect the experimental bridge plug center pipe with the connecting screw 2 through the conversion joint, and then put it into the casing with an inner diameter of Φ124.3mm;

[0055] In the second step, the oil guide plunger 8B port is connected to the laboratory high-pressure pipeline. The laboratory high-pressure pump injects high-pressure liquid into the oil cylinder 7 through the high-pressure pipeline to push the piston 3 to operate. The piston 3 drives the connecting screw 2 and the center tube of the bridge plug / ball seat to move axially, and the bridge plug / ball seat body and the push cylinder Figure 3 Close contact causes the center tube of the bridge plug / ball seat to move relative to the body, thereby completing the setting and release of the bridge plug / ball seat;

[0056] In the third step, the bridge plug is set and released in the casing, and the success rate of setting and releasing the bridge plug can be tested;

[0057] The fourth step is to check whether the setting status of the bridge plug meets the design requirements, so as to facilitate the next step of pressure testing after the bridge plug / ball seat is set.

[0058] The fifth step is to connect the 12A port of the cylinder rear cover to the laboratory high-pressure pipeline. The laboratory high-pressure pump injects high-pressure liquid into the cylinder 7 through the high-pressure pipeline to push the piston 3 to run. The piston drives the connecting screw to run. The hydraulic sealing detection device returns to the position before startup, and the next test can be carried out.

[0059] The present invention utilizes a hydraulic setting test device to quickly test the setting and release performance of the bridge plug in the laboratory, saving time for the next step of pressure testing after the bridge plug / ball seat is set, ensuring that the entire setting, release and pressure testing of the bridge plug can be quickly completed in the laboratory.

[0060] Embodiment 3:

[0061] When testing the soluble ball seat setting and release test, the corresponding specifications of the push cylinder ( Figure 3 ) and the conversion joint are connected to the corresponding ball seat. After completing the above steps, the setting and release performance tests of the ball seat can be completed. The test device can be replaced by replacing the corresponding specifications of the push tube Figure 3 And conversion joints can be used for various specifications of bridge plugs and ball seat setting and loss detection.

[0062] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope of the present invention.

[0063] The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry and are not described one by one here.

Claims

1. A hydraulic setting detection device, characterized in that: It comprises a support sleeve (1), a connecting screw (2), a piston (3), a front oil cylinder cover (4), an oil cylinder (7), an oil guide plunger (8), a sealing cover plate (11), and an oil cylinder rear cover (12); The two ends of the oil cylinder (7) are respectively installed with a front oil cylinder cover (4) and a rear oil cylinder cover (12); one end of the support sleeve (1) is connected to the front oil cylinder cover (4), and the piston (3) is arranged inside the front oil cylinder cover (4) for sealing and sliding connection; The support sleeve (1) is used to connect with the push cylinder, and a connecting screw (2) is installed inside the support sleeve (1), and the connecting screw (2) is connected with the piston (3); A sealing cover plate (11) is installed at the end of the piston (3), and a cavity is arranged inside the piston (3); a gap is arranged between the outside of the piston (3) and the oil cylinder (7), and a through hole is arranged on the side wall of the piston (3); An oil guide plunger (8) is arranged inside the cavity of the piston (3), and the oil guide plunger (8) is in sealing and sliding connection with the sealing cover plate (11); a through hole is arranged inside the oil guide plunger (8), one end of the through hole is connected to the laboratory high-pressure pipeline; the other end of the through hole is connected to the inner cavity of the piston (3); and a through hole is arranged on the oil cylinder rear cover (12) to connect to the laboratory high-pressure pipeline.

2. A hydraulic setting detection device according to claim 1, characterized in that: The sealing cover plate (11) is fixed to the end of the piston (3) by means of a hexagon socket bolt (10).

3. A hydraulic setting detection device according to claim 1, characterized in that: The support sleeve (1) and the front oil cylinder cover (4) are fixedly connected via threads.

4. A hydraulic setting detection device according to claim 1, characterized in that: A first O-type sealing ring (5) is installed on the contact surface between the piston (3) and the front cylinder cover (4) for sealing.

5. The hydraulic setting detection device according to claim 1, characterized in that: A second O-type sealing ring (6) is installed on the contact surface between the oil cylinder (7) and the front oil cylinder cover (4) for sealing.

6. The hydraulic setting detection device according to claim 1, characterized in that: A third O-ring (9) is installed on the contact surface between the sealing cover plate (11) and the piston (3) for sealing.

7. The hydraulic setting detection device according to claim 1, characterized in that: A fourth O-type sealing ring (13) is installed on the contact surface between the oil guide plunger (8) and the oil cylinder rear cover (12) for sealing.

8. The hydraulic setting detection device according to claim 1, characterized in that: The upper end of the connecting screw rod (2) is provided with a threaded buckle, which is connected to the bridge plug or the ball seat through a nut (14) with a conversion joint and is pressed and fixed with the push cylinder.

9. A hydraulic setting detection method, characterized in that: A hydraulic setting detection device according to any one of claims 1 to 8, comprising the following process: Connect the push tube to the support sleeve (1), connect the center tube of the experimental bridge plug to the connecting screw (2) through a conversion joint, and put it into the casing after the connection; The B port of the oil guide plunger (8) is connected to the laboratory high-pressure pipeline. The laboratory high-pressure pump injects high-pressure liquid into the oil cylinder (7) through the high-pressure pipeline to push the piston (3) to operate. The piston (3) drives the connecting screw (2) and the bridge plug center tube to move axially, and the bridge plug is in close contact with the push cylinder. The bridge plug center tube and the body move relatively to complete the setting and release of the bridge plug / ball seat. The bridge plug is set and released in the casing, and the success rate of the setting and release of the bridge plug is tested. Check whether the setting status of the bridge plug meets the design requirements, so as to facilitate the next step of pressure testing after the bridge plug is set.

10. A hydraulic setting detection method according to claim 9, characterized in that: The port A of the oil cylinder rear cover (12) is connected to the laboratory high-pressure pipeline. The laboratory high-pressure pump injects high-pressure liquid into the oil cylinder (7) through the high-pressure pipeline to push the piston (3) to operate. The piston drives the connecting screw (2) to operate. The hydraulic sealing detection device returns to the position before starting and performs the next detection.

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