Screw pump well completion pipe string pressure testing device

Abstract

The utility model relates to the technical field of screw pump pressure testing, and discloses a screw pump well completion pipe string pressure testing device which comprises a mounting ring, the inner wall of the mounting ring is fixedly connected with a connecting mechanism, the connecting mechanism is used for quickly connecting other structures, the top of the mounting ring is rotatably connected with a filtering mechanism, and the filtering mechanism is used for quickly connecting the other structures. The filtering mechanism can facilitate a user to clean impurities, the connecting mechanism comprises an oil conveying pipe, the oil conveying pipe is fixedly connected to the inner wall of the mounting ring, a connecting pipe is arranged on the outer wall of the oil conveying pipe, and a plurality of hollow blocks are fixedly connected to the position, close to the edge, of the bottom of the mounting ring; positioning assemblies are arranged on the sides, away from each other, of the multiple hollow blocks, and a limiting groove is formed in the top of the connecting pipe. According to the quick connecting device, the sleeve is inserted into the connecting pipe, and then the clamping block is rotated to limit the positions of the hollow block and the connecting pipe, so that the purpose of quick connection is achieved, the practicability is improved, and the mounting efficiency is accelerated.

Description

Technical Field

[0001] This utility model relates to the field of screw pump pressure testing technology, and in particular to a screw pump well completion tubing pressure testing device. Background Technology

[0002] Pressure testing of the screw pump completion string is a crucial step in ensuring the sealing and reliability of the downhole tubing in a screw pump oil production system. It directly impacts the safety and efficiency of subsequent production. If the pressure continuously drops during the test, and visual inspection reveals water backflow at the wellhead, tool connections, or casing, a leak is identified, requiring rectification and retesting. If the pressure fails to rise steadily during the test, it indicates incomplete gas purging within the tubing; the gas must be purged before pressurization. If premature packer setting prevents the pressure from reaching the design value, the setting pressure setting must be checked for rationality, and the testing procedure adjusted. Pressure testing of the screw pump completion string is one of the core procedures in well completion operations. Strict testing procedures and standards effectively ensure the sealing of the tubing and the reliability of downhole tools, laying a safe foundation for subsequent oil production. In practice, the specific oilfield conditions must be considered, and the testing procedures must be executed systematically, with timely handling of any abnormalities to ensure construction quality.

[0003] A search revealed Chinese Patent Publication No. CN212177123U, which discloses a screw pump completion string pressure testing device. The device body includes a first connector connected to a fixed valve. A fixed valve cover is connected to the fixed valve on the side away from the first connector. A valve ball assembly is disposed inside the fixed valve cover, and a valve ball is connected to the valve ball assembly. A movable push rod extending towards the valve ball is also provided on the first connector. A second connector is connected to the fixed valve cover on the side away from the fixed valve. Using this technical solution, when the push rod contacts the valve ball, the valve ball is opened, achieving oil drainage. The device body and the screw pump completion string are simultaneously placed into the well for pressure testing, and oil drainage can be performed when the pressure is qualified, reducing operating costs and shortening the drilling cycle. Although it can drain oil when the pressure is qualified, reducing operating costs, the installation and connection still use screws and flanges for connection, resulting in reduced installation efficiency and decreased practicality. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a screw pump completion string pressure testing device, which aims to improve the problem that the existing screw pump completion string pressure testing device still uses screws and flanges for connection, resulting in reduced installation efficiency and decreased practicality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a screw pump well completion tubing pressure testing device, including an installation ring, a connecting mechanism fixedly connected to the inner wall of the installation ring, the connecting mechanism being used to quickly connect the remaining structures, and a filter mechanism rotatably connected to the top of the installation ring, the filter mechanism enabling users to easily clean impurities;

[0006] The connecting mechanism includes an oil supply pipe, which is fixedly connected to the inner wall of the mounting ring. A connecting pipe is provided on the outer wall of the oil supply pipe. Multiple hollow blocks are fixedly connected to the bottom of the mounting ring near the edge. Positioning components are provided on the opposite sides of the multiple hollow blocks. A limit groove is formed at the top of the connecting pipe. Multiple lead screws are threadedly connected to the inner wall of the connecting pipe. A clamping plate is fixedly connected to an adjacent end of the lead screw. A sealing ring is fixedly connected to the middle of the inner wall of the connecting pipe. A test component is slidably connected to the bottom of the inner wall of the connecting pipe. An auxiliary component is fixedly connected to the outer wall of the lead screw.

[0007] The above technical solution involves: the outer wall of the mounting ring being designed with reasonable dimensions and shape to facilitate installation and fixation at the wellhead and on the test platform; the oil pipe serving as a fluid transmission channel, being fixedly connected to the inner wall of the mounting ring; one end of the oil pipe being connected to the completion tubing string, and the other end being connected to the test equipment or other related components to ensure smooth fluid transmission during pressure testing; the shape and size of the limiting groove matching the corresponding structure of the component to be connected, playing a positioning and limiting role during the connection process, ensuring the accuracy and stability of the connection; and when the lead screw is rotated, the clamping plate moves along the axial direction of the lead screw, thereby clamping and fixing the component to be connected inserted into the connecting pipe, achieving a reliable connection.

[0008] As a further description of the above technical solution:

[0009] The filtration mechanism includes a rotating shaft rotatably connected to the top of a mounting ring. A rotating ring is fixedly connected to the outer wall of the rotating shaft. A groove is provided on the top of the rotating ring. Multiple sliding blocks are slidably connected to the inner wall of the groove. Filter plates are fixedly connected between adjacent sliding blocks. A pressure-applying component is rotatably connected to the top of the rotating shaft. A fixing component is fixedly connected to the outer wall of the rotating ring.

[0010] Through the above technical solution: the rotating shaft is used to support the rotation of the rotating ring, thereby removing the internal structure; the sliding groove is used to guide the sliding block to slide within it; the filter plate can filter the oil that passes through it, preventing blockage of the device; and the sliding block can drive the filter plate to be inserted into the sliding groove.

[0011] As a further description of the above technical solution:

[0012] The fixing component includes a fixing block, which is fixedly connected to the outer wall of the rotating ring and the mounting ring. A bolt is slidably connected to the inner wall of the rotating ring, and a plurality of nuts are provided on the outer wall of the bolt.

[0013] Through the above technical solution, the bolt can be inserted into multiple fixing blocks to limit its horizontal movement, while the nut can be screwed onto the upper and lower ends of the bolt to limit its vertical movement.

[0014] As a further description of the above technical solution:

[0015] The pressure application assembly includes a connecting pipe rotatably connected to the top of a rotating shaft, a pressure testing pump connected to the top of the connecting pipe, and a pressure relief valve connected to the inner wall of the connecting pipe near its edge.

[0016] The above technical solution involves connecting the top structure with the rest of the mechanism via a connecting pipe, and releasing pressure beyond the device's capacity via a pressure relief valve, thereby preventing damage to the device.

[0017] As a further description of the above technical solution:

[0018] The test assembly includes a column, the outer wall of which is slidably connected to the inner wall of the connecting pipe, a centralizer is provided on the outer wall of the column, and a sleeve is fixedly connected to the outer wall of the centralizer.

[0019] The above technical solution involves: a centralizer used to straighten the column and prevent it from deviating from its intended position, and a sleeve used to guide and install the entire device.

[0020] As a further description of the above technical solution:

[0021] The auxiliary component includes a butterfly handle, which is fixedly connected to the outer wall of the lead screw, and a sealing ring is slidably connected to the outer wall of the lead screw near its edge.

[0022] Through the above technical solution, the butterfly handle can help the user turn the lead screw.

[0023] As a further description of the above technical solution:

[0024] The positioning component includes a slot, which is located on the opposite side of the hollow block. A pin is slidably connected to the inner wall of the slot, and a locking block is fixedly connected to the inner wall of the pin.

[0025] The above technical solution involves inserting a pin into a slot, which pushes the card block along the slot into the hollow block, thereby limiting the position of the hollow block as it rotates.

[0026] As a further description of the above technical solution:

[0027] The top of the sealing ring is in contact with the bottom of the oil pipe, and the outer wall of the clamping plate is in contact with the outer wall of the sleeve.

[0028] The above technical solution enables the sealing ring to seal the bottom end of the oil pipeline.

[0029] This utility model has the following beneficial effects:

[0030] 1. By inserting the sleeve into the connecting pipe, and then rotating the screw to clamp the sleeve with the clamping plate, the oil pipe is then inserted into the connecting pipe, which drives the hollow block into the limiting groove. This allows the slot to be inserted from the pin into the hollow block. Then, rotating the clamping block limits the position of the hollow block and the connecting pipe, achieving the purpose of quick connection, improving practicality, and speeding up installation efficiency.

[0031] 2. In this utility model, by rotating the nut, the bolt can be removed from the upper and lower ends. Then, the bolt can be removed from the fixing block. Next, the rotating ring can be rotated along the rotating shaft to expose the filter plate to the outside. Finally, the sliding block and filter plate can be removed along the slide groove for cleaning. This achieves the purpose of quickly cleaning the device, improving its practicality and speeding up maintenance efficiency. Attached Figure Description

[0032] Figure 1 This is a front perspective view of the screw pump well completion tubing pressure testing device proposed in this utility model;

[0033] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0034] Figure 3 This is a partial structural exploded view of the screw pump well completion tubing pressure testing device proposed in this utility model;

[0035] Figure 4 This is a cross-sectional view of the clamping plate of the screw pump well completion tubing pressure testing device proposed in this utility model;

[0036] Figure 5 This is a partial structural breakdown diagram of the slide groove of the screw pump well completion tubing pressure testing device proposed in this utility model;

[0037] Figure 6 This is a partial structural breakdown diagram of the hollow block of the screw pump well completion tubing pressure testing device proposed in this utility model;

[0038] Figure 7 This is a cross-sectional view of the sleeve of the screw pump completion tubing pressure testing device proposed in this utility model.

[0039] Legend:

[0040] 1. Mounting ring; 2. Connecting mechanism; 201. Oil pipe; 202. Connecting pipe; 203. Lead screw; 204. Auxiliary components; 2041. Sealing ring; 2042. Butterfly handle; 205. Limiting groove; 206. Sealing ring; 207. Clamping plate; 208. Positioning component; 2081. Slot; 2082. Locking block; 2083. Pin; 209. Hollow block; 210. Test component; 2 101. Sleeve; 2102. Column; 2103. Centralizer; 3. Filtering mechanism; 301. Rotating shaft; 302. Rotating ring; 303. Slide groove; 304. Filter plate; 305. Sliding block; 306. Fixing assembly; 3061. Nut; 3062. Fixing block; 3063. Bolt; 307. Pressure application assembly; 3071. Pressure relief valve; 3072. Connecting pipe; 3073. Pressure testing pump. Detailed Implementation

[0041] 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.

[0042] Please see the appendix Figure 1 - Appendix Figure 3 The present invention provides an embodiment of a screw pump well completion tubing pressure testing device, including a mounting ring 1, a connecting mechanism 2 fixedly connected to the inner wall of the mounting ring 1, the connecting mechanism 2 being used to quickly connect the remaining structures, and a filter mechanism 3 rotatably connected to the top of the mounting ring 1, the filter mechanism 3 enabling the user to easily clean impurities.

[0043] The connecting mechanism 2 includes an oil delivery pipe 201, which is fixedly connected to the inner wall of the mounting ring 1. A connecting pipe 202 is provided on the outer wall of the oil delivery pipe 201. The oil delivery pipe 201 is used to transport oil. A plurality of hollow blocks 209 are fixedly connected to the bottom of the mounting ring 1 near the edge. Positioning components 208 are provided on the opposite sides of the plurality of hollow blocks 209. A limiting groove 205 is formed on the top of the connecting pipe 202, and the hollow blocks 209 can be inserted into the limiting groove 205. A plurality of lead screws 203 are threadedly connected to the inner wall of the connecting pipe 202. A clamping plate 207 is fixedly connected to an adjacent end of the lead screw 203. A sealing ring 206 is fixedly connected to the middle of the inner wall of the connecting pipe 202. A test component 210 is slidably connected to the bottom of the inner wall of the connecting pipe 202. The lead screw 203 can drive the clamping plate 207 to clamp in the center as it rotates. An auxiliary component 204 is fixedly connected to the outer wall of the lead screw 203. The positioning component 208 includes a slot 2081. The slot 2081 is located on the side away from the hollow block 209. A pin 2083 is slidably connected to the inner wall of the slot 2081. A block 2082 is fixedly connected to the inner wall of the pin 2083. The pin 2083 can drive the block 2082 to be inserted into the slot 2081.

[0044] Specifically, during the connection process, the hollow block 209 can be inserted into the limiting groove 205 to achieve initial positioning. Subsequently, the pin 2083 drives the locking block 2082 to insert into the slot 2081, further fixing the connection position and ensuring the accuracy and stability of the connection. The slot 2081 matches the pin 2083 and the locking block 2082. When the lead screw 203 is rotated, the lead screw 203 will move along the thread direction, thereby driving the clamping plate 207 to clamp towards the center, tightly fixing the part to be connected inserted into the connecting tube 202, and realizing a reliable connection. During the connection process, the hollow block 209 can be accurately inserted into the limiting groove 205, playing a preliminary positioning role, ensuring that the connection position between the connecting tube 202 and the mounting ring 1 is accurate. When the part to be connected is inserted into the connecting tube 202 and clamped by the clamping plate 207, the sealing ring 206 will be squeezed and undergo elastic deformation, tightly fitting between the outer wall of the part to be connected and the inner wall of the connecting tube 202, forming a reliable seal and preventing fluid leakage during the pressure test.

[0045] Please see the appendix Figure 4 - Appendix Figure 6The filter mechanism 3 includes a rotating shaft 301, which is rotatably connected to the top of the mounting ring 1. A rotating ring 302 is fixedly connected to the outer wall of the rotating shaft 301. The rotating shaft 301 supports the rotation of the rotating ring 302. A groove 303 is provided on the top of the rotating ring 302. Multiple sliding blocks 305 are slidably connected to the inner wall of the groove 303. Filter plates 304 are fixedly connected between adjacent sliding blocks 305. The groove 303 can guide the sliding blocks 305 to engage within it. A pressure-applying component 307 is rotatably connected to the top of the rotating shaft 301. A fixing component 306 is fixedly connected to the outer wall of the rotating ring 302. A sliding block 305 can guide the filter plate 304 to slide and install. The fixing component 306 includes a fixing block 3062, which is fixedly connected to the outer wall of the rotating ring 302 and the mounting ring 1. A bolt 3063 is slidably connected to the inner wall of the rotating ring 302. The bolt 3063 can be inserted into multiple fixing blocks 3062 to limit its position. Multiple nuts 3061 are provided on the outer wall of the bolt 3063, which can limit the position of the bolt 3063.

[0046] Specifically, during the pressure test, fluid flows through one side of the filter plate 304. Impurities are intercepted on the surface of the filter plate 304, while clean fluid passes through the filter plate 304 and enters the device, thus ensuring the quality of the fluid entering the device. When the filter plate 304 needs to be installed, the user only needs to slide the sliding block 305 along the slide groove 303 to fix the filter plate 304 on the rotating ring 302. When the filter plate 304 needs to be removed for cleaning, the filter plate 304 can be easily removed by sliding the sliding block 305 in the opposite direction. The fixing block 3062 has through holes that match the bolts 3063 for inserting the bolts 3063. When fixing the filter mechanism 3, the bolts 3063 are passed through the through holes of the fixing blocks 3062 on the rotating ring 302 and the mounting ring 1 in sequence, so that the bolts 3063 are inserted into multiple fixing blocks 3062, thereby limiting the rotation of the rotating ring 302 and preventing it from rotating.

[0047] Please see the appendix Figure 3 - Appendix Figure 5 The auxiliary component 204 includes a butterfly handle 2042, which is fixedly connected to the outer wall of the lead screw 203. The butterfly handle 2042 is used to help the user rotate the lead screw 203. A sealing ring 2041 is slidably connected to the outer wall of the lead screw 203 near the edge. The test component 210 includes a column 2102. The sealing ring 2041 can improve the sealing of the connection of the lead screw 203. The outer wall of the column 2102 is slidably connected to the inner wall of the connecting pipe 202. A straightener 2103 is provided on the outer wall of the column 2102. A sleeve 2101 is fixedly connected to the outer wall of the straightener 2103. The straightener 2103 can straighten the position of the column 2102.

[0048] Specifically, the sleeve 2101 further protects the centralizer 2103 and the column 2102 from damage caused by external factors. The main function of the centralizer 2103 is to straighten the position of the column 2102 and prevent it from shifting or shaking within the connecting pipe 202, thereby ensuring the accuracy of the test data. The main function of the sealing ring 2041 is to improve the sealing performance of the connection between the screw 203 and the connecting pipe 202, preventing high-pressure fluid from leaking out from the gap between the screw 203 and the connecting pipe 202 during the pressure test.

[0049] Please see the appendix Figure 5 - Appendix Figure 7 The top of the sealing ring 206 is fitted with the bottom of the oil pipe 201, and the outer wall of the clamping plate 207 is fitted with the outer wall of the sleeve 2101. The fitting of the sealing ring 206 and the bottom of the oil pipe 201 can seal the connection. The pressure application assembly 307 includes a connecting pipe 3072, which is rotatably connected to the top of the rotating shaft 301. The top of the connecting pipe 3072 is connected to a pressure testing pump 3073, which is used to provide pressure for the entire device. The inner wall of the connecting pipe 3072 is connected to a pressure relief valve 3071 near the edge. The pressure relief valve 3071 can release excess pressure to prevent damage to the structure.

[0050] Specifically, the pressure relief valve 3071 is a safety protection device for the pressure application component 307. It can release excess pressure to prevent damage to the structure and avoid serious accidents such as rupture or explosion of the device due to excessive pressure, thus ensuring the safety of operators and equipment. During the pressure test, the pressure test pump 3073 draws in low-pressure fluid, compresses the fluid into high-pressure fluid through the reciprocating motion of the internal piston or plunger, and delivers it to other components of the pressure test device through the connecting pipe 3072.

[0051] Working principle: When connecting sleeve 2101 and oil pipe 201, first insert column 2102 into sleeve 2101, then use stabilizer 2103 to limit the position of column 2102, then insert sleeve 2101 into connecting pipe 202, rotate screw 203 to move clamping plate 207 to the center, thereby clamping sleeve 2101. At the same time, ensure that the top of sleeve 2101 fits against the bottom of sealing ring 206 during installation. Then insert oil pipe 201 into the top of connecting pipe 202, and at the same time drive installation ring 1 and hollow block 209 into limiting groove 205. Then insert pin 2083 into slot 2081, and simultaneously drive block 2082 into hollow block 209. Rotate block 2082 to make slot 2081 rotate synchronously, thereby limiting the connection between hollow block 209 and connecting pipe 202.

[0052] When the filter plate 304 needs to be regularly maintained and cleaned, first rotate the nuts 3061 on the upper and lower sides so that they can move along the bolts 3063 to both ends until they are completely away from the bolts 3063 and then stop. Then remove the bolts 3063 from the fixing block 3062, thereby releasing the limit between the rotating ring 302 and the mounting ring 1. Then rotate the rotating ring 302 along the rotating shaft 301 so that it can rotate out of the contact with the connecting pipe 3072, exposing the filter plate 304. Then remove the filter plate 304 and the sliding block 305 from the slide along the slide groove 303 and then reinstall them.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw pump completion tubing pressure testing device, including a mounting ring (1), characterized in that: The inner wall of the mounting ring (1) is fixedly connected to a connecting mechanism (2), which is used to quickly connect the remaining structures. The top of the mounting ring (1) is rotatably connected to a filter mechanism (3), which allows the user to easily clean impurities. The connecting mechanism (2) includes an oil supply pipe (201), which is fixedly connected to the inner wall of the mounting ring (1). A connecting pipe (202) is provided on the outer wall of the oil supply pipe (201). Multiple hollow blocks (209) are fixedly connected to the bottom of the mounting ring (1) near the edge. Positioning components (208) are provided on the opposite sides of the multiple hollow blocks (209). A limiting groove (205) is opened on the top of the connecting pipe (202). Multiple screw rods (203) are threadedly connected to the inner wall of the connecting pipe (202). A clamping plate (207) is fixedly connected to the adjacent end of the screw rod (203). A sealing ring (206) is fixedly connected to the middle of the inner wall of the connecting pipe (202). A test component (210) is slidably connected to the bottom of the inner wall of the connecting pipe (202). An auxiliary component (204) is fixedly connected to the outer wall of the screw rod (203).

2. The screw pump completion tubing pressure testing device according to claim 1, characterized in that: The filtration mechanism (3) includes a rotating shaft (301), which is rotatably connected to the top of the mounting ring (1). A rotating ring (302) is fixedly connected to the outer wall of the rotating shaft (301). A sliding groove (303) is provided on the top of the rotating ring (302). A plurality of sliding blocks (305) are slidably connected to the inner wall of the sliding groove (303). A filter plate (304) is fixedly connected between adjacent sliding blocks (305). A pressure application component (307) is rotatably connected to the top of the rotating shaft (301). A fixing component (306) is fixedly connected to the outer wall of the rotating ring (302).

3. The screw pump completion tubing pressure testing device according to claim 2, characterized in that: The fixing component (306) includes a fixing block (3062), which is fixedly connected to the outer wall of the rotating ring (302) and the mounting ring (1). The inner wall of the rotating ring (302) is slidably connected with a bolt (3063), and the outer wall of the bolt (3063) is provided with a plurality of nuts (3061).

4. The screw pump completion tubing pressure testing device according to claim 2, characterized in that: The pressure application assembly (307) includes a connecting pipe (3072) which is rotatably connected to the top of the rotating shaft (301). The top end of the connecting pipe (3072) is connected to a pressure testing pump (3073), and the inner wall of the connecting pipe (3072) near the edge is connected to a pressure relief valve (3071).

5. The screw pump completion tubing pressure testing device according to claim 1, characterized in that: The test assembly (210) includes a column (2102), the outer wall of the column (2102) is slidably connected to the inner wall of the connecting pipe (202), a stabilizer (2103) is provided on the outer wall of the column (2102), and a sleeve (2101) is fixedly connected to the outer wall of the stabilizer (2103).

6. The screw pump completion tubing pressure testing device according to claim 1, characterized in that: The auxiliary component (204) includes a butterfly handle (2042), which is fixedly connected to the outer wall of the lead screw (203), and a sealing ring (2041) is slidably connected to the outer wall of the lead screw (203) near the edge.

7. The screw pump completion tubing pressure testing device according to claim 1, characterized in that: The positioning component (208) includes a slot (2081) located on the opposite side of the hollow block (209). A pin (2083) is slidably connected to the inner wall of the slot (2081), and a block (2082) is fixedly connected to the inner wall of the pin (2083).

8. The screw pump completion tubing pressure testing device according to claim 1, characterized in that: The top of the sealing ring (206) is in contact with the bottom of the oil pipe (201), and the outer wall of the clamping plate (207) is in contact with the outer wall of the sleeve (2101).

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