Water distributor simulation pressing device

Abstract

The utility model provides a simulation pressing device for a water distributor. The simulation pressing device comprises a protective cylinder, a fixing mechanism, a pressing bucket, a sealing cover, the water distributor and a pressing pipeline, the protection cylinder is of a cylinder structure with the hollow center and is vertically buried in a preset hole. The fixing mechanism is arranged at a hole opening of the preset ground hole and is fixedly connected with the protective cylinder; the pressurizing water bucket is partially arranged in the protective cylinder in a penetrating manner in the vertical direction and is fixedly connected with the fixing mechanism, and an external thread is arranged at the upper end of the pressurizing water bucket; the bottom of the sealing cover is provided with internal threads, and the sealing cover is in threaded connection with the pressurizing bucket through the internal threads and the external threads; the water distributor is arranged in an inner cavity of the pressurizing bucket; the pressing pipeline comprises a water inlet component and a water drainage component; through special treatment on the thread between the sealing cover and the water distributor and the wall thickness of the pressurizing water barrel and arrangement of the pressurizing pipeline and the fixing mechanism, the standard of simulation detection is finally achieved, and then the simulation experiment of downhole equipment is achieved.

Description

Technical Field

[0001] The utility model relates to the field of downhole separate layer water injection, and more specifically, to a water distributor simulation pressure testing device. Background Technique

[0002] Separate layer water injection means that a packer is lowered into an injection well to separate oil layers with large differences, and then a water distributor is used for separate layer water distribution, so as to control the water injection volume of high-permeability layers, strengthen the water injection of medium and low-permeability oil layers, and enable various oil layers to play their roles. As an important tool for separate layer water injection, the water distributor needs to work at a depth of about 3000 meters underground, which is not convenient for maintenance; at the same time, due to the need to bear huge pressure during operation, if internal leakage occurs, it will cause equipment damage or even scrapping, resulting in major production accidents.

[0003] Therefore, after the separate layer water injection water distributor is assembled, it needs to be sealed and pressurized, and tested on the ground. It can be used only when there is no leakage or component damage. This link cannot be ignored; therefore, in order to detect the pressure-bearing capacity of the water distributor and avoid problems such as equipment damage and scrapping caused by failures underground, it is urgently necessary to conduct simulation pressure testing before production. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a water distributor simulation pressure testing device, so as to at least solve the problem that the separate layer water injection water distributor in the prior art is lowered into the well without being pressure-tested on the ground, resulting in equipment failure and scrapping or major production accidents underground.

[0005] To achieve the above purpose, the utility model provides a water distributor simulation pressure testing device, including: a protection cylinder, which is a cylindrical structure with a hollow center and is vertically buried in a preset underground hole; a fixing mechanism, which is arranged at the entrance of the preset underground hole and fixedly connected with the protection cylinder; a pressure testing water bucket, which is a cylindrical bucket structure with a closed bottom and an open top, and the pressure testing water bucket is partially inserted into the protection cylinder in the vertical direction and fixedly connected with the fixing mechanism. The upper end of the pressure testing water bucket is provided with an external thread; a sealing cover, the bottom of the sealing cover is provided with a counterbore, the center of the bottom surface of the counterbore is provided with a lifting mechanism, and the inner side wall of the counterbore is provided with an internal thread matching the external thread. The sealing cover is screwed with the pressure testing water bucket through the internal thread and the external thread; a water distributor, which is arranged in the internal cavity of the pressure testing water bucket, and the upper end of the water distributor is connected with the lifting mechanism; a pressure testing pipeline, which includes a water inlet component and a water drainage component, and the water inlet component and the water drainage component are oppositely arranged on both sides of the outer side wall of the pressure testing water bucket and are mutually communicated with the inner cavity of the pressure testing water bucket. The pressure testing pipeline is used to control the water inlet and drainage during operation.

[0006] Further, the pitch of both the internal thread and the external thread is 8 mm, and the fit tolerance is 8H / 7f; the surface roughness of the internal thread and the external thread is ≤ 1.6, and both the internal thread and the external thread are quenched and tempered.

[0007] Further, multiple groups of O-ring rubber seals are also provided on the outer side wall and the end face of the upper end head of the pressure test water bucket. The following proportional relationship exists between the wall thickness of the pressure test water bucket and the outer diameter of the pressure test water bucket:

[0008] δ = (P * D) / (σ * γ + P) + C

[0009] Wherein, δ is the wall thickness of the pressure test water bucket (mm)

[0010] P is the design pressure of the pressure test water bucket (MPa)

[0011] D is the outer diameter of the pressure test water bucket (mm)

[0012] σ is the allowable stress of the pressure test water bucket (MPa)

[0013] γ is the welding coefficient, defaulting to 1

[0014] C is the sum of the thickness allowances, that is, C = C1 + C2 + C3; C1 - thickness reduction compensation (mm), defaulting to 1 (mm); C2 - corrosion allowance (mm), defaulting to 0.2 (mm); C3 - thread machining depth (mm), and the thread depth is taken as 9.8 (mm).

[0015] Further, the fixing mechanism includes: a fixing plate with a hole in the center. The fixing plate is fixed to the ground plane by expansion bolts, and the protection cylinder is welded to the fixing plate; a fixing frame welded to the outer side wall of the pressure test water bucket along the circumferential direction of the pressure test water bucket, and the fixing frame is fixed to the fixing plate by bolts.

[0016] Further, the sealing cover further includes: a top cover with a counterbore opened on the bottom end face. The lifting mechanism is fixedly connected to the bottom end of the counterbore of the top cover; multiple force - adding rods evenly spaced along the circumferential direction of the top cover; a lifting ring fixedly arranged on the top end face of the top cover.

[0017] Further, the lifting mechanism includes: a lifting eye bolt arranged at the bottom end of the counterbore; a lifting tooling with two parallel and spaced - apart lifting rings at the upper end. The upper end of the lifting tooling is hinged to the lifting eye bolt, and the lower end of the lifting tooling is connected to the upper end head of the water distributor; a lifting rod passing through the lifting eye bolt and the lifting rings of the lifting tooling; wherein, the lifting ring of the lifting eye bolt is inserted into the space between the two lifting rings of the lifting tooling, and the lifting rod passes through the three lifting rings to enable the lifting tooling and the lifting eye bolt to be hinged.

[0018] Furthermore, the water inlet component includes: a water inlet pipe, which is arranged on the outer wall of the pressure water bucket and is connected to the interior of the pressure water bucket; a stop valve, which is arranged above the pipe body of the water inlet pipe to control the flow of water entering; a pressure gauge, which is arranged at the upper end of the stop valve; and a one-way valve, which is arranged at the connection between the water inlet pipe and the pressure water bucket.

[0019] Furthermore, the drainage component includes: a drainage pipe, which is arranged on the outer wall of the pressure bucket and connected to the interior of the pressure bucket; and a pressure relief valve, which is arranged above the pipe body of the drainage pipe to control water discharge.

[0020] A water distributor simulation pressure-pressing device using the technical solution of the utility model comprises: a protective tube, which is a cylindrical structure with a hollow center and is vertically buried in a preset underground hole; a fixing mechanism, which is arranged at the hole mouth of the preset underground hole and is fixedly connected to the protective tube; a pressure-pressing water bucket, which is a cylindrical barrel structure with a closed lower end and an open upper end, which is partially penetrated in the protective tube along the vertical direction and is fixedly connected to the fixing mechanism, and the upper end of the pressure-pressing water bucket is provided with an external thread; a sealing cover, which is provided with a countersunk hole at the bottom of the sealing cover, a lifting mechanism is provided at the center of the bottom surface of the countersunk hole, an internal thread matching the external thread is provided on the inner side wall of the countersunk hole, and the sealing cover is screwed to the pressure-pressing water bucket through the internal thread and the external thread; a water distributor, which is arranged in the internal cavity of the pressure-pressing water bucket, and the upper end of the water distributor is connected to the lifting mechanism; a pressure-pressing pipeline, which comprises a water inlet part The water inlet and the water outlet components are arranged on both sides of the outer wall of the pressure bucket and are connected with the inner cavity of the pressure bucket. The pressure pipeline is used to control the water inlet and water outlet during work. The device is stabilized as a whole by the fixing mechanism. The setting of the pressure pipeline can monitor the pressure in real time and control the water pressure to avoid accidents, and can also perform accurate detection. The threads that have been quenched and tempered can play a good sealing role to avoid danger caused by leakage pressure. At the same time, the 8H / 7f thread groups cooperate with each other, and the 8mm pitch avoids the self-locking caused by too fine pitch, which is more convenient for the staff to tighten and disassemble. By special treatment of the threads between the sealing cover and the water distributor and the wall thickness of the pressure bucket, the pressure pipeline and the fixing mechanism are set at the same time, and finally the standard of simulation detection is met, thereby realizing the simulation experiment of the downhole equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0022] Figure 1 It is a cross-sectional view of a water distributor simulation pressure device which can be selected according to an embodiment of the utility model.

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 10. Protection cylinder; 20. Fixing mechanism; 30. Pressurizing water bucket; 32. External thread; 33. O-ring rubber seal; 40. Sealing cover; 41. Lifting mechanism; 42. Internal thread; 50. Water distributor; 60. Pressurizing pipeline; 61. Water inlet component; 62. Drainage component; 21. Fixed plate; 22. Fixed bracket; 43. Top cover; 44. Force increasing rod; 45. Suspension ring; 411. Eye bolt; 412. Lifting tooling; 413. Lifting rod; 611. Water inlet pipe; 612. Globe valve; 613. Pressure gauge; 614. Check valve; 621. Drain pipe; 622. Pressure relief valve. Detailed implementation manners

[0025] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail the present utility model.

[0026] According to the first embodiment of the present invention, a water distributor simulation pressurizing device is disclosed. As Figure 1 shown, it includes a protection cylinder 10, a fixing mechanism 20, a pressurizing water bucket 30, a sealing cover 40, a water distributor 50 and a pressurizing pipeline 60. The protection cylinder 10 is a cylindrical structure with a hollow center and is vertically buried in a preset underground hole. Such a design ensures the stability of the device in the formation and reduces the influence of the external environment on the simulation experiment. The fixing mechanism 20 is arranged at the opening of the preset underground hole and is fixedly connected to the protection cylinder 10, ensuring the stability and reliability of the entire system. The pressurizing water bucket 30 is a cylindrical bucket structure with a closed bottom and an open top. Part of it is vertically penetrated in the protection cylinder 10 and is fixedly connected to the fixing mechanism 20. The upper end of the pressurizing water bucket 30 is provided with an external thread 32. Such a structural design facilitates quick installation and disassembly and improves the experimental efficiency. The bottom of the sealing cover 40 is provided with a counterbore. The center of the bottom surface of the counterbore is provided with a lifting mechanism 41. The inner side wall of the counterbore is provided with an internal thread 42 that matches the external thread 32. The sealing cover 40 is screwed onto the pressurizing water bucket 30 through the internal thread 42 and the external thread 32, with good sealing effect and preventing water pressure leakage. The water distributor 50 is arranged in the internal cavity of the pressurizing water bucket 30, and its upper end is connected to the lifting mechanism 41. Such a design facilitates the installation and disassembly of the water distributor 50 and improves the operability of the device. The pressurizing pipeline 60 includes a water inlet component 61 and a drainage component 62, which are respectively arranged on both sides of the outer side wall of the pressurizing water bucket 30 and are communicated with the inner cavity of the pressurizing water bucket 30 for controlling water inlet and drainage, facilitating precise water pressure adjustment.

[0027] Furthermore, the pitch of both the internal thread 42 and the external thread 32 is [X] millimeters, the fit tolerance is H / f, the surface roughness is ≤1.6, and both have been quenched and tempered. Such machining accuracy and surface treatment improve the firmness and sealing performance of the threaded connection, effectively preventing leakage problems.

[0028] Furthermore, multiple O-ring rubber seals 33 are provided on the outer sidewall and end face of the upper end of the pressure test bucket 30. These seals 33 enhance the sealing performance of the system and prevent water pressure leakage. The ratio of the wall thickness to the outer diameter of the pressure test bucket 30 is as follows:

[0029] δ = (P * D) / (σ * γ + P) + C

[0030] Where, δ is the wall thickness of the pressure test bucket (mm)

[0031] P is the design pressure of the pressure test bucket (MPa)

[0032] D is the outer diameter of the pressure test bucket (mm)

[0033] σ is the allowable stress of the pressure test bucket (MPa)

[0034] γ is the welding coefficient, defaulting to 1

[0035] C is the sum of the thickness allowances, including the thickness reduction compensation (default 1 millimeter), the corrosion allowance (default 0.2 millimeter), and the threaded machining depth (thread depth 9.8 millimeters). This design of the ratio ensures the structural strength and safety of the pressure test bucket 30 in a high-pressure environment.

[0036] Furthermore, the fixing mechanism 20 includes a fixing plate 21 and a fixing frame 22. A hole is opened in the center of the fixing plate 21, and it is fixed to the ground plane by expansion screws and welded to the protection cylinder 10. This design provides additional structural support and increases the stability and durability of the overall system. The fixing frame 22 is welded to the outer sidewall of the pressure test bucket 30 along the circumferential direction and fixed to the fixing plate 21 by bolts, ensuring the stability of the bucket 30 during the pressure test and preventing any displacement.

[0037] Furthermore, the sealing cover 40 includes a top cover 43, multiple force-applying rods 44, and a lifting ring 45. A counterbore is opened at the bottom end of the top cover 43, and the lifting mechanism 41 is fixedly connected to the bottom end of the counterbore of the top cover 43, ensuring the stability of the top cover 43 during the pressure test. Multiple force-applying rods 44 are evenly spaced along the circumferential direction of the top cover 43. This design makes the force applied to the top cover 43 more uniform and improves the sealing effect. The lifting ring 45 is fixed to the top end of the top cover 43, facilitating lifting and operation.

[0038] Further, the lifting mechanism 41 includes a lifting eye bolt 411, a lifting tooling 412, and a lifting rod 413. The lifting eye bolt 411 is arranged at the bottom end of the counterbore. The upper end of the lifting tooling 412 has two parallel and spaced-apart lifting eyes, which are hinged to the lifting eye bolt 411, and the lower end is connected to the upper end head of the water distributor 50. This design facilitates the installation and disassembly of the water distributor 50. The lifting rod 413 passes through the lifting eye bolt 411 and the lifting eye of the lifting tooling 412 to hinge the two, improving the safety and convenience of the lifting operation.

[0039] Further, the water inlet component 61 includes a water inlet pipe 611, a stop valve 612, a pressure gauge 613, and a check valve 614. The water inlet pipe 611 is arranged on the outer side wall of the pressure test water bucket 30 and is internally connected. The stop valve 612 controls the water flow into it. The pressure gauge 613 is arranged above the stop valve 612 to facilitate real-time monitoring of the water pressure. The check valve 614 is arranged at the connection between the water inlet pipe 611 and the pressure test water bucket 30 to prevent water from flowing back, ensuring the safety and reliability of the system.

[0040] Further, the drainage component 62 includes a drainage pipe 621 and a pressure relief valve 622. The drainage pipe 621 is arranged on the outer side wall of the pressure test water bucket 30 and is internally connected. The pressure relief valve 622 is arranged above the drainage pipe 621 to control the water flow discharge, facilitating rapid pressure relief when needed and ensuring the safety of the operation.

[0041] In specific implementation, first, the protection cylinder 10 and the fixing plate 21 are welded. Then, the protection cylinder 10 is placed into the ground hole, and the fixing plate 21 is fixed to the ground with expansion bolts. Such a design ensures the stability of the device. After the fixing plate 21 is completely fixed, the fixing frame 22 is placed above the protection cylinder 10 and fixed to the fixing plate 21 with expansion bolts. At the same time, the pressure test water bucket 30 is passed through the fixing frame 22 and the fixing plate 21 and extends into the protection cylinder 10. After reaching the appropriate depth, the lowering is stopped, and the outer wall of the pressure test water bucket 30 and the fixing frame 22 are welded, ensuring the sealing and stability of the system. The eyebolt 411 is installed at the bottom of the top cover 43. Then, the lifting tooling 412 is clamped on both sides of the eyebolt 45, and the lifting rod 413 passes through the three eyebolts 45, making the lifting tooling 412 hinged with the eyebolt 411, ensuring the safety and stability of the lifting process. After the lifting mechanism 41 and the top cover 43 are installed, the water distributor 50 is assembled with the lifting tooling 412 and placed into the pressure test water bucket 30. By rotating the top cover 43 through multiple force increasing rods 44, under the cooperation of the internal thread 42 and the external thread 32, the sealing cover 40 is screwed to the pressure test water bucket 30. The multiple groups of O-ring rubber seals 33 arranged on the end face and the outer side wall of the pressure test water bucket 30 ensure the sealing effect. Finally, the water inlet component 61 and the drain component 62 are respectively installed on both sides of the pressure test water bucket 30. When simulating the pressure test, observe the pressure gauge 613, and control the stop valve 612 and the pressure relief valve 622 to ensure the safe and effective pressure test simulation experiment. This design and operation method improve the accuracy and safety of the experiment and ensure the reliability of the experimental results.

[0042] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water distributor simulation pressure device, characterized in that: include: A protective tube (10), the protective tube (10) being a cylindrical structure with a central hollow, and the protective tube (10) being vertically buried in a preset underground cave; A fixing mechanism (20), the fixing mechanism (20) being arranged at the opening of the preset ground hole and fixedly connected to the protection tube (10); A pressure water bucket (30), the pressure water bucket (30) is a cylindrical barrel structure with a closed lower end and an open upper end, the pressure water bucket (30) is partially vertically inserted into the protective tube (10) and is fixedly connected to the fixing mechanism (20), and the upper end of the pressure water bucket (30) is provided with an external thread (32); A sealing cover (40), wherein a countersunk hole is formed at the bottom of the sealing cover (40), a lifting mechanism (41) is provided at the center of the bottom surface of the countersunk hole, an internal thread (42) matching the external thread (32) is formed on the inner side wall of the countersunk hole, and the sealing cover (40) and the water-pressing bucket (30) are screwed together via the internal thread (42) and the external thread (32); a water distributor (50), the water distributor (50) being arranged in the internal cavity of the water-pressing bucket (30), the upper end of the water distributor (50) being connected to the lifting mechanism (41); A pressure pipeline (60), the pressure pipeline (60) comprising a water inlet component (61) and a water discharge component (62), the water inlet component (61) and the water discharge component (62) being arranged opposite to each other on two sides of the outer wall of the pressure water bucket (30) and being in communication with the inner cavity of the pressure water bucket (30), the pressure pipeline (60) being used to control water inlet and water discharge during operation.

2. The water distributor simulation pressure device according to claim 1, characterized in that: The surface roughness of the internal thread (42) and the external thread (32) is ≤1.6, and both the internal thread (42) and the external thread (32) are subjected to quenching and tempering treatment.

3. The water distributor simulation pressure device according to claim 2, characterized in that: A plurality of groups of O-type rubber sealing rings (33) are also provided on the outer side wall and end surface of the upper end of the pressure water bucket (30).

4. The water distributor simulation pressure device according to claim 1, characterized in that: The fixing mechanism (20) comprises: A fixing plate (21), wherein a hole is opened at the center of the fixing plate (21), the fixing plate (21) is fixed to the ground plane by expansion screws, and the protection tube (10) and the fixing plate (21) are welded together; A fixing frame (22), the fixing frame (22) being welded to the outer wall of the water-pressing bucket (30) along the circumference of the water-pressing bucket (30), and the fixing frame (22) being fixed to the fixing plate (21) by bolts.

5. The water distributor simulation pressure device according to claim 1, characterized in that: The sealing cover (40) further comprises: A top cover (43), wherein the countersunk hole is formed on a bottom end surface of the top cover (43), and the lifting mechanism (41) is fixedly connected to the bottom end of the countersunk hole of the top cover (43); A plurality of force-adding rods (44), wherein the plurality of force-adding rods (44) are evenly spaced along the circumference of the top cover (43); A lifting ring (45) is fixedly arranged on the top end surface of the top cover (43).

6. The water distributor simulation pressure device according to claim 5, characterized in that: The lifting mechanism (41) comprises: An eye bolt (411), the eye bolt (411) being arranged at the bottom end of the countersunk hole; A lifting fixture (412), wherein the upper end of the lifting fixture (412) has two lifting rings arranged in parallel and at intervals, the upper end of the lifting fixture (412) is hinged to the lifting ring bolt (411), and the lower end of the lifting fixture (412) is connected to the upper end of the water distributor (50); A lifting rod (413), the lifting rod (413) passing through the lifting eye bolt (411) and the lifting eye of the lifting tool (412); The lifting eye of the lifting eye bolt (411) is inserted into the interval between two lifting eyes of the lifting tool (412), and the lifting rod (413) passes through three lifting eyes so that the lifting tool (412) and the lifting eye bolt (411) are hinged.

7. The water distributor simulation pressure device according to claim 1, characterized in that: The water inlet component (61) comprises: a water inlet pipe (611), the water inlet pipe (611) being arranged on the outer side wall of the water-pressing bucket (30) and being in communication with the interior of the water-pressing bucket (30); A stop valve (612), the stop valve (612) being arranged above the pipe body of the water inlet pipe (611) and used for controlling water flow entering; a pressure gauge (613), the pressure gauge (613) being arranged at an upper end of the stop valve (612); A one-way valve (614) is provided at the connection between the water inlet pipe (611) and the water pressure bucket (30).

8. The water distributor simulation pressure device according to claim 1, characterized in that: The drainage component (62) comprises: a drainage pipe (621), the drainage pipe (621) being arranged on the outer side wall of the water-pressing bucket (30) and being in communication with the interior of the water-pressing bucket (30); A pressure relief valve (622), the pressure relief valve (622) being arranged above the pipe body of the drainage pipe (621) and used for controlling water discharge.

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