Soluble bridge plug for oil industry

Abstract

The present application relates to the technical field of detection of drilling equipment in petroleum industry, and particularly relates to a soluble bridge plug type test device for downhole in petroleum industry, which comprises a ground liquid supply device, an underground test cylinder device, a skid-mounted guide rail device and a moving connection device; the underground test cylinder device comprises a test cylinder body, a heating device, a test oil casing device, a cylinder body sealing device and a clamp device; the test cylinder body is inserted into the heating device, the cylinder body sealing device is installed on the moving connection device, and the moving connection device is linearly and slidingly connected with the skid-mounted guide rail device; the right end of the test oil casing device is detachably and sealingly connected with a high-pressure channel assembly, and the left end is inserted into the test cylinder body; the clamp device is installed on the skid-mounted guide rail device, and the ground liquid supply device comprises a test liquid tank and a test pipe manifold unit. The technical scheme has the advantages of convenient operation and safety, is convenient for cleaning, maintenance and repair, can save time and personnel cost, and achieves the purpose of improving quality and increasing efficiency.

Description

Technical Field

[0001] This invention relates to the field of testing technology for drilling and production equipment in the petroleum industry, and in particular to a type testing device for soluble bridge plugs used in petroleum wells. Background Technology

[0002] In the past decade or so, with the expansion of shale gas extraction, shale gas has become one of the country's main energy sources. Deep shale gas reservoirs undergo multi-stage fracturing operations, sometimes reaching dozens of layers. In traditional drilling techniques, cable-driven pumps are used to temporarily isolate the well section for hydraulic fracturing. After fracturing, the formation is acidized, and then specially formulated sand is injected under high pressure to fill the formation fractures. Shale gas can then enter the main gas well channel through the gaps in the sand. Before production, the composite bridge plug needs to be removed using coiled tubing, increasing costs and processing time. Furthermore, the bridge plug removal operation is highly risky, with risks such as stuck pipe.

[0003] Soluble bridge plugs are materials that, under certain conditions, can transform from a large volume into a particle or molecular state within a certain time through physical changes and / or chemical reactions. With the development of soluble bridge plugs, they are used to plug stratification during hydraulic fracturing. After fracturing, acidizing, and sand-addition operations are completed, the bridge plug dissolves within a certain time under standard-specified temperature and medium conditions, completely unblocking the wellbore. This solves a series of problems encountered when using cable-transmitted pump-driven drillable composite bridge plugs for unblocking after operations, improving work efficiency and significantly reducing costs.

[0004] Before being put into mass production, soluble bridge plugs must undergo design type testing in accordance with the oil and gas industry standard SY / T 7462 "Soluble Bridge Plugs for Oil and Gas Drilling and Production Equipment". The design type testing includes: 1) pressure resistance test; 2) effective sealing time and complete dissolution time verification; 3) drill-free rapid dissolution verification; 4) dimensional and appearance inspection; 5) ultrasonic testing of the metal mandrel and slips; and 6) thread inspection of the connection between the soluble bridge plug and the adapter. Of these, tests 1) to 3) must be completed using specialized testing equipment, while tests 4) to 6) can be completed using general-purpose tools.

[0005] The specialized testing apparatus for performing tests 1) to 3) must meet the following requirements: Figure 37 The table showing the main technical specifications for soluble bridge plugs specifies the required temperature, dimensional, time, and pressure parameters. However, the existing testing apparatus has the following drawbacks:

[0006] 1. Vertical test apparatus, although occupying less space, has a deeper test pit, making equipment maintenance difficult, and the removal and collection of soluble bridge plug residues are also difficult.

[0007] 2. The heat transfer oil in some test devices is heated by a special heating device. The high-temperature oil is pumped to the oil tank containing the test cylinder by an oil pump to heat the test cylinder. This increases the equipment and the possibility of leakage. If the heating device malfunctions, the test cannot be carried out.

[0008] 3. Regardless of whether it is a vertical or horizontal test device, some of the connection parts of the test cylinder are exposed to high-temperature oil. If these connection parts leak, the water-based test fluid will explode in the high-temperature oil, causing an accident. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a simple and practical soluble bridge plug type test device for the petroleum industry, which solves the problems of difficult maintenance, complex operation and safety in the existing technology.

[0010] Specifically, this is achieved through the following technical solutions:

[0011] A soluble bridge plug type testing device for downhole applications in the petroleum industry includes a surface fluid supply device, an underground test cylinder device, a skid-mounted guide rail device, and a movable connecting device. The underground test cylinder device is installed on the top left side of the skid-mounted guide rail device and includes a test cylinder body, a heating device, a test oil casing device, a cylinder sealing device, and a clamping device. The central axis of the test cylinder body is parallel to the top of the skid-mounted guide rail device. The heating device is inserted into the left end of the test cylinder body and is equipped with a low-pressure fluid inlet structure. The right end of the test cylinder body is open, and a fluid outlet structure is located near the right end. The movable connecting device is located on the right side of the test cylinder body and is linearly slidably connected to the skid-mounted guide rail device along the axial direction of the corresponding test cylinder body. The cylinder sealing device is detachably installed on the movable connecting device and is equipped with a high-pressure channel assembly. The test oil casing... The right end of the device is detachably and sealed to the high-pressure channel assembly, and the left end of the test oil casing device is slidably connected to the inner wall of the test cylinder body; the clamp device is fixedly installed on the skid-mounted guide rail device corresponding to the open end of the test cylinder body, for detachably and securely connecting the cylinder sealing device to the test cylinder body; the ground liquid supply device includes a test liquid tank for storing the test liquid and a test manifold unit for controlling the test pressure; the test manifold unit includes a return pipe, a pressure relief pipe, and several pipe fixing seats for fixing the return pipe and the pressure relief pipe; the low-pressure liquid inlet structure and the high-pressure channel assembly are connected to the test liquid tank through the pressure relief pipe; the liquid outlet structure is connected to the test liquid tank through the return pipe.

[0012] Preferably, the heating device includes a heating chamber, inside which a heater is installed, and the outside of the heating chamber is wrapped with a heat insulation device; the left end of the test cylinder body passes through the heating chamber and is inserted into the heat insulation device.

[0013] Preferably, the heating box includes a rectangular box with an open top; the interior of the rectangular box is provided with several heating installation pipes for placing heaters, a drain pipe is connected to the rectangular box, and a drain valve is connected to the drain pipe; cylindrical mounting holes are respectively opened at both ends of the rectangular box; and an annular sealing structure is provided along the cylindrical mounting holes.

[0014] Preferably, the inner wall of the heating chamber and the outer wall of the test cylinder body cooperate to form an annular sealed oil cavity, and the annular sealed oil cavity is filled with heat-conducting oil.

[0015] Preferably, the reflux pipeline includes a main reflux body, and a first low-pressure cannula, a second low-pressure cannula, and a low-pressure overflow pipe inserted into the test liquid tank; one end of the main reflux body is connected to the liquid outlet structure, and the other end is connected to the low-pressure overflow pipe through a right-angle tee; the first low-pressure cannula and the second low-pressure cannula are respectively connected to the main reflux body through a T-shaped tee, and the second low-pressure cannula is located between the first low-pressure cannula and the low-pressure overflow pipe; a first pressure measuring device is connected to the main reflux body, and the first low-pressure cannula is located between the first pressure measuring device and the second low-pressure cannula; a low-pressure pneumatic shut-off valve is connected to the first low-pressure cannula, a low-pressure manual shut-off valve is connected to the second low-pressure cannula, and an overflow valve is connected to the low-pressure overflow pipe.

[0016] Preferably, the pressure relief pipeline includes a main pressure relief pipe, a branch pressure relief pipe, a liquid guide pipe, and a first high-pressure connector and a second high-pressure connector inserted into the test liquid tank; the two ends of the main pressure relief pipe are respectively connected to a high-pressure channel assembly and a low-pressure liquid inlet structure; on the main pressure relief pipe, from the end connected to the low-pressure liquid inlet structure to the end connected to the high-pressure channel assembly, a low-pressure check valve, a low-pressure acid pump, a high-pressure acid pump, and a high-pressure check valve are sequentially connected; one end of the branch pressure relief pipe is connected to the main pressure relief pipe via a T-shaped tee, and the other end of the branch pressure relief pipe is connected via... A right-angle tee connects to the second high-pressure cannula, and the first high-pressure cannula is connected to the pressure relief branch via a T-shaped tee. A second pressure measuring device is connected to the pressure relief branch, and the first high-pressure cannula is positioned between the second pressure measuring device and the second high-pressure cannula. A high-pressure pneumatic shut-off valve is connected to the first high-pressure cannula, and a high-pressure manual shut-off valve is connected to the second high-pressure cannula. One end of the liquid guide tube is connected to the main pressure relief tube via a T-shaped tee, and the other end is connected to the bottom or side of the test liquid tank. A filter and a liquid outlet shut-off valve are connected to the liquid guide tube.

[0017] Preferably, the test liquid tank includes a liquid storage tank body with an open top and a tank cover. An extended platform is circumferentially arranged along the edge of the tank opening of the liquid storage tank body, and platform baffles are arranged around the extended platform. The tank cover is located on the top of the liquid storage tank body and is fastened to the extended platform. The tank cover has a liquid filling port and several insertion holes. The liquid filling port is equipped with a liquid filling cap, and the insertion holes are equipped with orifice caps with axial through holes.

[0018] Preferably, the test casing device includes a casing body and a casing support; the casing body includes a tube for placing the soluble bridge plug to be tested, one end of the tube is provided with a rear cap, the other end of the tube is provided with a high-pressure end cap, the high-pressure end cap is provided with an annular end cap sealing ring inside, and a high-pressure pipe assembly is connected to the high-pressure end cap; the casing support includes a support base, and a number of tube fasteners are provided on the top of the support base.

[0019] Preferably, the mobile connection device includes a vehicle body, and a connecting seat for installing the cylinder sealing device is provided on the top of the vehicle body.

[0020] Preferably, the clamping device includes a lifting support base, and the top of the lifting support base is provided with an operable fastening unit for connecting the cylinder sealing device and the test cylinder body.

[0021] The beneficial effects of this technical solution are:

[0022] 1) The test apparatus disclosed in this invention meets the temperature, size, time, and pressure requirements specified in the main technical specifications table for soluble bridge plugs. Most importantly, the combination of the test oil casing device, cylinder sealing device, clamping device, and movable connection device ensures the ease of operation and safety of the test. In addition, the horizontal structure of this technical solution facilitates the cleaning of residues generated by the test apparatus, effectively avoids residue accumulation, and facilitates maintenance and repair, saving time and personnel costs, thereby achieving the goal of improving quality and efficiency.

[0023] 2) This technical solution adopts a special heating device structure that integrates heating, pressurization and dissolution functions. It uses an annular oil bath to heat the test solution, which has high heating efficiency and uniform heating. In addition, the test cylinder body passes through the heating box in the heating device. The heating box is equipped with an external heat preservation device, which can not only slow down heat loss and prevent burns, but also effectively reduce the risk of leakage.

[0024] 3) The test cylinder body passes through the heating chamber in the heating device, so that the joint position on the test cylinder body (the position corresponding to the liquid outlet structure and the low-pressure liquid inlet structure) is outside the heating chamber. Even if the test medium leaks during the test, an explosion accident can be avoided. Attached Figure Description

[0025] The foregoing and hereinafter detailed description of the invention becomes clearer when read in conjunction with the following drawings, in which:

[0026] Figure 1 This is a front sectional view of the structure of this technical solution;

[0027] Figure 2 This is a top view and structural schematic diagram of the technical solution;

[0028] Figure 3 A schematic diagram of the front structure for supplying liquid to the ground;

[0029] Figure 4 A schematic diagram of the left-side structure for supplying liquid to the ground;

[0030] Figure 5 A top-view structural diagram of the ground-based liquid supply device;

[0031] Figure 6 This is a schematic diagram of the front cross-sectional structure of the heating box;

[0032] Figure 7 This is a schematic diagram of the left side structure of the heating box;

[0033] Figure 8 This is a top view of the heating chamber.

[0034] Figure 9 This is a schematic diagram of the right side of the heating chamber;

[0035] Figure 10 A schematic diagram of the front structure of the skid-mounted guide rail device;

[0036] Figure 11 A top view of the skid-mounted guide rail device;

[0037] Figure 12 A side view of the skid-mounted guide rail device;

[0038] Figure 13 This is a schematic diagram of the left side structure of the insulation device;

[0039] Figure 14 A top view of the insulation device;

[0040] Figure 15 This is a schematic diagram of the right side structure of the insulation device;

[0041] Figure 16 This is a front sectional view of the insulation device.

[0042] Figure 17 This is a schematic diagram of the front structure of the heater;

[0043] Figure 18 This is a schematic diagram of the front structure of the test cylinder body;

[0044] Figure 19 This is a schematic diagram of the front cross-sectional structure of the test cylinder body;

[0045] Figure 20 This is a schematic diagram of the right side structure of the test cylinder body;

[0046] Figure 21This is a schematic diagram of the left side structure of the test cylinder body;

[0047] Figure 22 This is a schematic diagram of the front structure of the clamp device;

[0048] Figure 23 This is a top view of the clamp device.

[0049] Figure 24 This is a schematic diagram of the right side structure of the clamp device;

[0050] Figure 25 This is a schematic diagram of the front cross-sectional structure of the casing body;

[0051] Figure 26 A schematic diagram of the front structure of the casing support for the casing body;

[0052] Figure 27 A top view of the casing support structure of the casing body;

[0053] Figure 28 This is a schematic diagram of the left side structure of the casing support for the casing body;

[0054] Figure 29 This is a schematic diagram of the right side structure of the casing support for the casing body;

[0055] Figure 30 A schematic diagram of the front structure of the cylinder sealing device;

[0056] Figure 31 This is a schematic diagram of the right side structure of the cylinder sealing device;

[0057] Figure 32 This is a front sectional view of the cylinder sealing device.

[0058] Figure 33 This is a schematic diagram of the left side structure of the cylinder sealing device;

[0059] Figure 34 A schematic diagram of the front structure of a preferred cylindrical sealing device;

[0060] Figure 35 A schematic diagram of the front structure of the mobile connection device;

[0061] Figure 36 A schematic diagram of the left side structure of the mobile connection device;

[0062] Figure 37 Table of main technical specifications for soluble bridge plugs.

[0063] In the picture:

[0064] 1. Skid-mounted guide rail device; 2. Test cylinder body; 2.1 Liquid outlet structure; 2.2 Low-pressure liquid inlet structure; 3. Heating device; 4. Heating chamber; 4.1 Rectangular chamber; 4.2 Heating mounting pipe; 4.3 Drain pipe; 4.4 Drain valve; 4.5 Cylinder mounting hole; 4.6 Annular sealing structure; 5. Heater; 6. Insulation device; 7. Annular sealing oil chamber; 8. Heat transfer oil; 9. Test oil sleeve device; 9.1 Sleeve body; 9.1.1 9.1.1 Pipe body; 9.1.2 Rear cover; 9.1.3 High-pressure end cap; 9.1.4 Annular end cap sealing ring; 9.1.5 High-pressure pipe assembly; 9.2 Sleeve support; 9.2.1 Support base; 9.2.2 Pipe body fasteners; 10. Cylinder sealing device; 10.1 High-pressure channel assembly; 11. Clamping device; 11.1 Lifting support seat; 11.2 Operable fastening unit; 12. Test liquid tank; 12.1 Liquid storage tank body; 12.2 Tank cover 12.3 Extension platform; 12.4 Platform baffle; 12.5 Liquid filling cap; 13. Return pipeline; 13.1 Return main body; 13.2 First low-pressure cannula; 13.3 Second low-pressure cannula; 13.4 First pressure measuring device; 13.5 Low-pressure pneumatic shut-off valve; 13.6 Low-pressure manual shut-off valve; 13.7 Overflow valve; 13.8 Low-pressure overflow pipe; 14. Pressure relief pipeline; 14.1 Pressure relief main body; 14.2 Pressure relief branch pipe 14.3. Liquid guide tube body; 14.4. First high-pressure cannula; 14.5. Second high-pressure cannula; 14.6. Low-pressure check valve; 14.7. Low-pressure acid pump; 14.8. High-pressure acid pump; 14.9. High-pressure check valve; 14.10. Second pressure measuring device; 14.11. High-pressure pneumatic shut-off valve; 14.12. High-pressure manual shut-off valve; 14.13. Filter; 14.14. Liquid outlet shut-off valve; 15. Moving connection device; 16. Tube body fixing seat. Detailed Implementation

[0065] To make the purpose, technical solution and advantages of the invention clearer, the technical solution of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the invention, but not all embodiments.

[0066] Therefore, the following detailed description of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0067] Example 1

[0068] This embodiment provides a type testing device for soluble bridge plugs used in petroleum industry downholes, as a preferred implementation of this technical solution, such as... Figure 1-2 As shown, the device includes a ground-based liquid supply device, an underground test cylinder device, a skid-mounted guide rail device 1, and a movable connecting device 15. The underground test cylinder device is installed on the left side of the top of the skid-mounted guide rail device 1 and includes a test cylinder body 2, a heating device 3, a test oil casing device 9, a cylinder sealing device 10, and a clamping device 11. The central axis of the test cylinder body 2 is parallel to the top of the skid-mounted guide rail device 1. The heating device 3 is inserted into the left end of the test cylinder body 2 and a low-pressure liquid inlet structure 2.2 is provided. The right end of the test cylinder body 2 is open, and a liquid outlet structure 2.1 is provided near the right end of the test cylinder body 2. The movable connecting device 15 is located on the right side of the test cylinder body 2 and is linearly slidably connected to the skid-mounted guide rail device 1 along the axial direction of the corresponding test cylinder body 2. The cylinder sealing device 10 is detachably installed on the movable connecting device 15 and is equipped with a high-pressure... Channel assembly 10.1; the right end of the test oil casing device 9 is detachably and sealed to the high-pressure channel assembly 10.1, and the left end of the test oil casing device 9 is slidably connected to the inner wall of the test cylinder body 2; the clamp device 11 is fixedly installed on the skid-mounted guide rail device 1 corresponding to the open end of the test cylinder body 2, for detachably and securely connecting the cylinder sealing device 10 and the test cylinder body 2; the ground liquid supply device includes a test liquid tank 12 for storing test liquid and a test manifold unit for controlling test pressure; the test manifold unit includes a return pipe 13, a pressure relief pipe 14 and several pipe fixing seats 16 for fixing the return pipe 13 and the pressure relief pipe 14; the low-pressure liquid inlet structure 2.2 and the high-pressure channel assembly 10.1 are connected to the test liquid tank 12 through the pressure relief pipe 14; the liquid outlet structure 2.1 is connected to the test liquid tank 12 through the return pipe 13.

[0069] In the specific implementation process, the test liquid tank 12 contains test liquid and a floating level gauge A-4. The test liquid tank 12 has two outlets at its bottom or side: one for the test liquid flowing to the underground test cylinder device, and the other for wastewater cleaning. The test liquid tank 12 includes a storage tank body 12.1 with an open top and a cover 12.2. An extended platform 12.3 is circumferentially arranged along the edge of the opening of the storage tank body 12.1, and platform baffles 12.4 are arranged around the extended platform 12.3. The cover 12.2 is located on top of the storage tank body 12.1 and is securely connected to the extended platform 12.3. Preferably, bolts are fixed to the extended platform 12.3, and the cover 12.2 is fixed to the bolts of the extended platform 12.3 using connecting nuts. Test liquid appearing on the cover 12.2 can flow back into the storage tank body 12.1. The tank cover 12.2 has a liquid filling port and several insertion holes. A liquid filling cap 12.5 is installed on the liquid filling port, and orifice caps with axial through-holes are installed on the insertion holes. Specifically, there are five insertion holes: three low-pressure pipe inlets and two high-pressure pipe inlets. The diameter of each insertion hole is three times the outer diameter of the pipe passing through it (for easy adjustment of the position via rigid pipe connection). To prevent the test liquid from splashing out of the cover surface during pressure relief and backflow, orifice caps are designed at the orifice openings. The diameter of the axial through-hole on the orifice cap is 0.5 mm larger than the outer diameter of the pipe passing through the insertion hole, and the outer diameter of the orifice cap is twice the diameter of the insertion hole. A level hole is provided on the tank cover 12.2 according to the floating level gauge A-4.

[0070] Furthermore, such as Figure 3-4As shown, the return pipeline 13 includes a main return pipe body 13.1, and a first low-pressure insertion tube 13.2, a second low-pressure insertion tube 13.3, and a low-pressure overflow pipe 13.8 inserted into the test liquid tank 12. Specifically, the first low-pressure insertion tube 13.2, the second low-pressure insertion tube 13.3, and the low-pressure overflow pipe 13.8 are inserted into the test liquid tank 12 in a one-to-one correspondence with the three low-pressure pipe inlet holes. One end of the main return pipe body 13.1 is connected to the liquid outlet structure 2.1, and the other end is connected to the low-pressure overflow pipe 13.8 via a right-angle T-junction. The first low-pressure insertion tube 13.2 and the second low-pressure insertion tube 13.3 are respectively... The return main body 13.1 is connected via a T-shaped tee, and the second low-pressure inlet tube 13.3 is located between the first low-pressure inlet tube 13.2 and the low-pressure overflow tube 13.8. A first pressure measuring device 13.4 is connected to the return main body 13.1, and the first low-pressure inlet tube 13.2 is located between the first pressure measuring device 13.4 and the second low-pressure inlet tube 13.3. A low-pressure pneumatic shut-off valve 13.5 is connected to the first low-pressure inlet tube 13.2, a low-pressure manual shut-off valve 13.6 is connected to the second low-pressure inlet tube 13.3, and an overflow valve 13.7 is connected to the low-pressure overflow tube 13.8. In addition, the pressure relief pipeline 14 includes a pressure relief main body 14.1, a pressure relief branch body 14.2, a liquid guide body 14.3, and a first high-pressure insertion tube 14.4 and a second high-pressure insertion tube 14.5 inserted into the test liquid tank 12. Specifically, the first high-pressure insertion tube 14.4 and the second high-pressure insertion tube 14.5 are inserted into the test liquid tank 12 in a one-to-one correspondence with the two high-pressure pipe inlet holes. The two ends of the pressure relief main body 14.1 are respectively connected to the high-pressure channel assembly 10.1 and the low-pressure liquid inlet structure 2.2. On the pressure relief main body 14.1, from the end connected to the low-pressure liquid inlet structure 2.2 to the end connected to the high-pressure channel assembly 10.1, a low-pressure check valve 14.6, a low-pressure acid pump 14.7, a high-pressure acid pump 14.8, and a high-pressure check valve 14.9 are connected in sequence. One end of the pressure relief branch body 14.2 is connected via a T-shaped... The pressure relief main body 14.1 is connected to a T-junction, and the other end of the pressure relief branch body 14.2 is connected to the second high-pressure inlet tube 14.5 via a right-angle T-junction. The first high-pressure inlet tube 14.4 is connected to the pressure relief branch body 14.2 via a T-junction. A second pressure measuring device 14.10 is connected to the pressure relief branch body 14.2, and the first high-pressure inlet tube 14.4 is located between the second pressure measuring device 14.10 and the second high-pressure inlet tube 14.5. A high-pressure pneumatic shut-off valve 14.11 and a high-pressure manual shut-off valve 14.12 are connected to the first high-pressure inlet tube 14.3. One end of the liquid guide tube 14.3 is connected to the pressure relief main body 14.1 via a T-junction, and the other end is connected to the bottom or side of the test liquid tank 12. A filter 14.13 and a liquid outlet shut-off valve 14.14 are connected to the liquid guide tube 14.3.The first pressure measuring device 13.4 and the second pressure measuring device 14.10 have the same structure, both including a pressure gauge and a sensor. The pressure gauge and the sensor are connected to the corresponding pipes through a cross four-way connector. Specifically, sealing copper gaskets are installed in the upper and lower holes of the cross four-way connector, the pressure gauge is installed in the upper hole, and the pressure sensor is installed in the lower hole. The two ends of the cross four-way connector are connected to the corresponding pipes. In addition, the inlet tube of the second low-pressure inlet tube 13.3 is about 50mm above the highest test liquid level, and the inlet tubes of the first low-pressure inlet tube 13.2 and the low-pressure overflow tube 13.8 are about 100mm below the lowest test liquid level. The low-pressure pneumatic shut-off valve 13.5 is used for emergency pressure relief. The function of the overflow valve 13.7 is to allow the high-pressure test liquid to enter the test cylinder body 2 from the soluble bridge plug cavity when the soluble bridge plug dissolves, causing the internal pressure of the test cylinder body 2 to rise. When the pressure rises to the opening pressure of the overflow valve 13.7, the test liquid returns to the test liquid tank 12 through the low-pressure overflow tube 13.8. The function of the low-pressure manual shut-off valve 13.6 on the tank cover 12.2 is to be used when manual operation is required. After the low-pressure manual shut-off valve 13.6 is opened, the test liquid in the test cylinder body 2 can be discharged from the high-pressure channel assembly 10.1 on the cylinder sealing device 10. The first high-pressure cannula 14.4 and the second high-pressure cannula 14.5 are immersed approximately 100 mm below the lowest test liquid level. The high-pressure pneumatic shut-off valve 14.11 controls the pressure value; if the pressure exceeds the set pressure, the system controls the high-pressure pneumatic shut-off valve 14.11 to open. The high-pressure pneumatic shut-off valve 14.11 can also be used for emergency pressure relief. The high-pressure manual shut-off valve 14.12 is used when manual operation is required.

[0071] Furthermore, such as Figure 11-12As shown, the skid-mounted guide rail device 1 is assembled and welded in two parts. The first part is the skid-mounted mounting frame C-1 on the left side, which consists of the heating device 3 placement box support plate C-1-1, skid-mounted longitudinal channel steel C-1-2, heating device 3 placement box bottom plate C-1-3, skid-mounted transverse channel steel C-1-4, liquid receiving box C-1-5, lifting steel pipe end face baffle C-1-6, skid-mounted lifting steel pipe C-1-7, heating device 3 placement box rear horizontal plate C-1-8, heating device 3 placement box longitudinal plate C-1-9, and heating device 3 placement box front horizontal plate C-1-10. It is welded together. Five screw holes are machined on the horizontal plate C-1-8 behind the heating device 3 and the vertical plate C-1-9 on the right side of the heating device 3. A cylindrical head hexagonal screw C-4 is installed in the screw hole, and a hexagonal head nut C-5 is installed on the screw. A vertical push plate C-6 and a horizontal push plate C-7 are placed at the front end of the screw C-4. When the heat preservation device 6 is put in, the screw C-4 is screwed inward to eliminate the gap between the heating device 3 and the heating device 3 placement box. The second part is the track assembly C-2 on the right, which is welded together by light rail C-2-1, light rail mounting channel steel C-2-2, movable stop channel steel seat C-2-3, and fixed stop angle steel C-2-4. The movable stop C-3 is welded together by handle C-3-1, movable stop angle steel C-3-2, positioning pin mounting plate C-3-3, and positioning pin C-3-4. The third part is the movable stop assembly C-3, which is welded together by handle C-3-1, movable stop angle steel C-3-2, positioning pin mounting plate C-3-3, and positioning pin C-3-4. The two positioning pins C-3-4 of the movable stop assembly can be inserted into the two holes of the movable stop channel steel seat C-2-3 to prevent the moving connecting device 15 from moving backward. If the movable stop assembly C-3 is removed, the moving connecting device 15 can run to the fixed stop angle steel C-2-4 to facilitate the collection of residues in the test cylinder body 2.

[0072] Furthermore, such as Figure 18-21As shown, the middle part of the test cylinder body 2 is a through hole. The left end face is machined with a sealing gasket groove and evenly distributed screw holes. The outer circle of the left end step is machined with a sealing ring groove, a positioning groove and a hard-seal conical surface. The right end face is machined with a trapezoidal connecting ring body that connects with the clamp. The outer circle of the right end step is machined with a sealing ring groove, a hard-seal conical surface and a tapered screw hole for connecting the liquid outlet pipe. The tapered screw hole communicates with the inner hole of the test cylinder body 2. The tapered screw hole connects to the lower outlet riser G-1, low-pressure right-angle tee G-2, outlet flat pipe G-3, low-pressure right-angle tee G-2, and outlet upper riser G-4, which is connected to the return pipe 13. High-temperature resistant rubber O-rings G-12 are placed in the outer circular sealing ring grooves on both sides. A test cylinder head sealing gasket G-15 is installed in the sealing gasket groove on the left end face of the test cylinder body 2. Double-ended studs G-10 and nuts G-9 are used to connect the test cylinder head flange G-16 to the left end face of the test cylinder body 2. A test cylinder head flange inlet straight pipe G-17, a test cylinder head flange inlet straight pipe pressure cap G-18, and a temperature sensor are installed in the inlet hole at the lower end of the test cylinder head flange G-16. The sensor has a high-temperature resistant rubber O-ring G-7 and a sealing copper gasket G-8. A flange insulation cover hanging pin G-19 is symmetrically installed at the horizontal position of the circumference of the test cylinder head flange G-16. A low-pressure right-angle tee G-2, a liquid inlet flat pipe G-14, a low-pressure right-angle tee G-2, and a liquid inlet riser G-13 are connected in sequence to the rear end of the liquid inlet riser G-13. The upper outlet of the liquid inlet riser G-13 is connected to the low-pressure end of the pressure relief pipe 14 in the ground liquid supply device. A temperature sensor G-5, a temperature sensor cap G-6, a high-temperature resistant rubber O-ring G-7 (4 pieces), and a sealing copper gasket G-8 are installed in the temperature sensor hole in the middle of the test cylinder head flange G-16.

[0073] Furthermore, such as Figure 22-24The clamping device 11 shown includes a lifting support base 11.1, and an operable fastening unit 11.2 is provided on the top of the lifting support base 11.1. In the figure, the part below the lifting solenoid seat H-7-1 belongs to the structure of the lifting support base 11.1, and the part from the lifting solenoid seat H-7-1 to the top belongs to the operable fastening unit 11.2. The clamp support assembly H-26 is welded together from side plate H-26-1 and front panel H-26-2. Eight square holes are machined in front panel H-26-2. A movable roller H-27 for the clamp insulation cover is installed in each square hole using a movable roller shaft H-28, a spring washer H-29, and a nut H-30. The outer surface of the roller protrudes 5mm above front panel H-26-2. A circular hole is located in the center of the clamp support assembly, with four threaded holes evenly distributed around it. A lifting screw assembly mounting base H-10 is installed on the clamp support assembly using cylindrical head socket screws H-25. The mounting base H-10 has an inner and outer through-slot at the round step. A lifting solenoid anti-rotation key H-8 is installed in the slot using a cylindrical head hexagonal screw H-9. When the lifting nut H-12 is rotated, the lifting solenoid assembly H-7 can only move up and down without rotating. A lifting solenoid heat insulation pad H-11 is placed on the upper surface of the mounting base H-10 to minimize heat loss. The lifting solenoid assembly H-7 is welded from the lifting solenoid seat H-7-1 and the lifting solenoid H-7-2. A cylindrical head hexagonal screw H-24 is used to connect the lifting solenoid assembly, passing through the lifting solenoid. The four through holes on the upper part of seat H-7-1 connect to the four threaded holes on the lower end face of the lower clamp body H-13. The lifting screw H-7-2 is inserted downwards into the hole of the lifting screw assembly mounting seat H-10. The lifting screw H-7-2 mates with the lifting screw anti-rotation key H-8. Using the upper clamp connecting pin H-21 in the left end hole of the lower clamp body H-13, the fastening bolt H-1 is connected to the lower clamp body. A cotter pin H-23 is threaded through the connecting pin H-21, and the front end of the pin is bent to prevent it from falling off. Using the buffer spring mounting seat connecting bolt H-5 on the upper end face of the left end of the lower clamp body H-13, the buffer spring mounting seat H-1 is installed. 4. Buffer spring H-6: The function of the buffer spring is to prevent the trapezoidal groove of the upper clamp body H-22-1 from colliding with the right end of the test cylinder body 2 and the trapezoidal step at the left end of the cylinder sealing device 10 when the upper clamp assembly H-22 is closed. The lower clamp anti-rotation connecting pin H-15 is used in the right end hole of the lower clamp body H-13 to install the upper and lower clamp connecting blocks H-14 on the lower clamp body. Keyways are designed on the right end hole of the lower clamp body H-13, the clamp anti-rotation connecting pin H-15, and the upper and lower clamp connecting blocks H-14. The lower clamp anti-rotation key H-16 is installed in the groove to achieve the fixed positioning of the upper and lower clamp connecting blocks H-14.An upper clamp anti-tipping block H-17 is installed on the left end face of the upper clamp connecting block H-14 using an upper clamp anti-tipping block connecting bolt H-18. The function of the anti-tipping block is to prevent the upper clamp assembly H-22 from tilting to the right when it is opened to the right. The width of the upper clamp anti-tipping block H-17 is 5mm smaller than the thickness of the upper clamp connecting block H-14, so that it will not interfere when the upper clamp assembly H-22 is opened to the right. The upper clamp body H-22-1 and the handle H-22-1 are welded together. The upper clamp connecting pin H-21 passes through the through hole at the left end of the upper clamp body H-22-1 and the upper end of the upper clamp connecting block H-14. A cotter pin H-23 is inserted through the upper clamp connecting pin H-21 and the pin is then... To prevent the front end from twisting and falling off, an upper clamp anti-rotation pin H-19 is installed on the right end of the upper clamp body H-22-1 and the upper end of the upper and lower clamp connecting block H-14. An upper clamp anti-rotation pin locking screw H-20 is installed on the upper clamp anti-rotation pin H-19. When the upper clamp assembly H-22 opens to the right, it can be positioned. The right end of the upper clamp body H-22-1 has an opening groove. The fastening bolt H-1 is rotated clockwise to the opening groove, a spherical flat washer H-3 is installed, and a spherical nut H-2 is installed and tightened to complete the clamp's closing connection. The inner circle of the upper and clamp bodies is a trapezoidal groove, which combines with the trapezoidal step at the right end of the test cylinder body 2 and the left end of the cylinder sealing device 10.

[0074] Furthermore, the test casing assembly 9 includes a casing body 9.1 and a casing support 9.2. For example... Figure 25As shown, the casing body 9.1 includes a tube body 9.1.1 for placing the soluble bridge plug to be tested. One end of the tube body 9.1.1 is provided with a rear cover 9.1.2, and the other end of the tube body 9.1.1 is provided with a high-pressure end cap 9.1.3. An annular end cap sealing ring 9.1.4 is provided inside the high-pressure end cap 9.1.3, and a high-pressure pipe assembly 9.1.5 is connected to the high-pressure end cap 9.1.3. In the figure, the high-pressure end cap 9.1.3 includes a test oil casing high-pressure end cap 9.1.3 connector I-6, a high-pressure pipe sleeve I-7 (2 pieces), a high-pressure pipe cap I-8 (2 pieces), and a high-pressure pipe I-9. The tube body 9.1.1 has the same shape at both ends, allowing it to be reversed and reused after use at one end. Both ends of the tube body 9.1.1 are machined with trapezoidal threads, and two O-ring seal grooves are machined at the rear end of the threads. The inner bore and other outer diameters of the tube are not machined. The high-temperature resistant annular end cap seal 9.1.4 is installed in the O-ring seal groove. The rear cover 9.1.2 is a non-pressure-bearing part with two through holes at the rear end. The high-pressure end cap 9.1.3 has a sealing surface and trapezoidal threads machined in its inner bore, and a hard-connection threaded hole is machined at the top of its end. The high-pressure end cap 9.1.3 connector I-6, high-pressure tube I-9, high-pressure tube sleeve I-7, and high-pressure tube cap I-8 are installed in the threaded hole. The other end of the high-pressure tube I-9 is also connected to the high-pressure tube sleeve I-7 and high-pressure tube cap I-8, and this end is connected to the conversion connector K-13 of the end cap body K-10 of the cylinder sealing device 10. The rear cover (9.1.2), tube body (9.1.1), high-pressure end cap (9.1.3), and high-temperature resistant annular end cap sealing ring (9.1.4) are available in 6 specifications according to standard requirements.

[0075] The sleeve support 9.2 includes a support base 9.2.1, and a plurality of pipe fasteners 9.2.2 are provided on the top of the support base 9.2.1. For example... Figure 26-29As shown, the pipe fasteners 9.2.2 include the test oil casing pressure ring J-9, the test oil casing pressure ring double-ended stud J-13, the test oil casing pressure ring double-ended stud connecting plate J-7-2, and the pressure adjustment nut J-7-10; the remaining structure belongs to the support base 9.2.1. Mounting bracket assembly J-7 is welded together from side plate J-7-1, test oil sleeve pressure ring double-ended stud connecting plate J-7-2, rear plate J-7-3, and base plate J-7-4. Mounting bracket assembly J-7 has a groove at its front end. Roller seat assembly J-5 is installed at the front end of mounting bracket assembly J-7 using roller seat connecting cylindrical head hexagonal screws J-2. Roller seat assembly J-5 is welded together from front panel J-5-1, side plate J-5-2, and base plate J-5-3. Roller J-1 is installed on side plate J-5-2 of roller seat assembly J-5 using roller shaft J-4. Threaded holes are designed at the lower part of both side plates J-5-2, and roller shaft locking cylinders are installed in these holes. The head hexagonal screw J-3 restricts the rotation of the roller shaft J-4. The mounting bracket assembly J-7 has three through holes on its base plate J-5-3 to allow the test liquid accumulated on the base plate to drain downwards. Two through-threaded holes are designed at both ends of the base plate J-5-3, into which V-shaped iron lifting adjustment hexagonal studs J-6 are installed. Four through-threaded holes are designed on both side plates, into which V-shaped iron left and right adjustment hexagonal screws J-14 are installed. Test oil sleeve pressure ring double-headed stud connecting plates J-7-2 are welded to the upper end faces of both side plates J-5-2. Test oil sleeve pressure ring nuts J-11 are used to connect and fix the test oil sleeve through the through holes of the connecting plates J-7-2. The pressure ring double-ended stud J-13 and the test oil casing pressure ring double-ended stud connecting plate J-7-2 have elongated slot-shaped through holes. The position of the test oil casing pressure ring double-ended stud J-13 can be adjusted according to the specifications of the soluble bridge plug being tested. A rear plate J-7-3 is welded to the rear of the bottom plate J-5-3 and the side plate J-5-2. A special mounting bracket is installed in the two through holes of the rear plate to connect the cylindrical head hexagonal screws J-8, realizing the connection with the cylinder sealing device 10. The slot at the bottom of the V-shaped iron J-12 is aligned with the V-shaped iron lifting adjustment hexagonal screw J-6. The left and right adjustment hexagonal screws J-14 on both sides of the V-shaped iron are screwed into the slots on both sides of the V-shaped iron J-12. Inside, the position of V-12 is adjusted by adjusting the up and down of the internal hexagonal stud J-6 and the left and right of the internal hexagonal screw J-14. When in use, place the tube body 9.1.1 on the V-12, rotate the tube body 9.1.1 so that the high-pressure tube I-9 is at the top, adjust the up, down, left and right position of the tube body 9.1.1 so that the high-pressure tube I-9 of the tube body 9.1.1 is aligned with the conversion connector K-13 on the cylinder sealing device 10, push it in, screw on and tighten the high-pressure tube cap I-8, then align the hole of the test oil casing pressure ring J-9 with the double-headed stud J-13 of the test oil casing pressure ring and insert it, and then screw on the nut J-11.

[0076] Furthermore, such as Figures 30-34 The diagram shows the structure of the cylinder sealing device 10. The adapter K-13, high-pressure right-angle tee K-8, high-pressure pipe sleeve K-9, high-pressure pipe cap K-10, and high-pressure riser K-11 (high-pressure riser K-20) all belong to the high-pressure channel assembly 10.1. As shown in the diagram, the front end face of the cylinder sealing device 10 has two sealing ring grooves. After placing high-temperature resistant O-ring rubber seals K-12 and K-16, they provide end-face sealing during testing. A right-angle upward channel hole is designed in the upper middle part of the front end face of the main body. The inlet and outlet of the hole are connected to the adapter K-13, and the upper outlet is sequentially connected to the high-pressure riser K-11, high-pressure pipe sleeve K-9, high-pressure pipe cap K-10, high-pressure right-angle tee K-8, horizontal high-pressure flat pipe K-19, and high-pressure right-angle tee. K-8, longitudinal high-pressure flat pipe K-7, plug cap K-6; ​​A square groove is designed in the lower middle part of the front end face of the main body, with two threaded holes at the bottom of the groove. The rear plate of the mounting bracket assembly J-7 is installed in the square groove and connected by a special mounting bracket and cylindrical head hexagonal screw J-8; There is a right-angle channel hole at the bottom of the main body. A filter screen (4 mesh) K-15 is installed at the inlet of the channel hole to prevent debris from clogging the channel hole when discharging the test liquid in the test cylinder body 2. A drain valve connecting pipe K-17 is connected to the outlet of the channel hole. 1. Relief valve K-18, relief valve outlet pipe K-19; A conical step is designed at the front end of the cylinder sealing device 10 to guide the cylinder sealing device 10 to align with the inner hole of the test cylinder body 2; After the test is completed, before opening the cylinder sealing device 10, the test liquid A-3 in the test cylinder body 2 needs to be completely drained; A groove is designed in the middle of the rear end face of the cylinder sealing device 10, and there are two through holes on the upper and lower surfaces of the groove. After inserting the connecting block L-1 of the movable connecting device 15 into the groove, the groove... Inserting the connecting pin K-5 completes the connection between the cylinder sealing device 10 and the movable connecting device 15. Removing the connecting pin K-5 separates the cylinder sealing device 10 from the movable connecting device 15. Adjusting plates K-4 are installed on both sides of the groove using adjusting seat plates and cylindrical head hexagonal screws K-1. Adjusting cylindrical head hexagonal screws K-2 can be used to adjust the lateral position of the connecting block L-1 in the groove to ensure the alignment and fit between the cylinder sealing device 10 and the test cylinder body 2.

[0077] Furthermore, such as Figures 35-36As shown, the mobile connecting device 15 includes a vehicle body, with a connecting seat on the top of the vehicle body. In the figure, the vehicle body includes a roller shaft L-15, roller shaft connecting bolts L-16, roller body connecting bolts L-14, a maintenance-free bearing L-13, a roller body L-12, and a lower panel L-5; the connecting seat includes an upper panel assembly L-4, which is welded from an upper panel L-4-1, a lower stiffening plate L-4-2, a lifting lug plate L-4-3, and a lifting lug plate stiffening plate L-4-4. The upper panel L-4-1 has two through holes at its front end. Connecting blocks L-1 are connected together using connecting block connecting bolts L-2 and connecting block connecting nuts L-3. The front end has two through holes, which can be used to connect with the cylinder sealing device 10 using connecting pin K-5. To increase the rigidity of the upper panel, a lower stiffening plate L-4-2 is welded to the bottom of the front end of the upper panel. For easy hoisting, a lifting lug plate L-4-3 is welded to the upper rear end of the upper panel L-4-1. To facilitate the movement of the movable connecting device 15, push rods L-9 are installed on both sides of the upper panel L-4-1. The middle of the upper panel L-4-1 also has four through holes for the column L-11 to pass through. The lower panel L-5 has 12 threaded holes of three different specifications for use. Six roller shaft connecting bolts L-16 connect roller shaft L-15 to the bottom surface of lower plate L-5. Install counterweight plate connecting studs L-6 in two of the threaded holes. Install counterweight plates L-8 onto counterweight plate connecting studs L-6. Screw counterweight plate connecting nuts L-7 into counterweight plate connecting studs L-6. Install columns L-11 in the remaining four threaded holes. Screw lifting adjustment nuts L-10 into columns L-11. After aligning the four through holes of upper panel L-4-1 with columns L-11 and installing them, adjust the lifting adjustment nuts L-10 to adjust the upper panel... The column is leveled, and the lifting adjustment nut L-10 is screwed into it. The vertical position of the connecting block L-1 can be adjusted by screwing in the lifting adjustment nut L-10. There are three connecting through holes in the middle of the roller shaft L-15. The maintenance-free bearing L-13 and the roller body L-12 are respectively installed at both ends of the roller shaft L-15. The roller body connecting bolts L-14 are installed at both ends of the roller shaft L-15 to prevent the roller body L-12 from falling off during operation. When in use, the operator can push the push rod L-9 to move the moving connecting device 15 back and forth.

[0078] Furthermore, the heating device 3 includes a heating box 4, with a heater 5 installed inside the heating box 4, and an insulation device 6 covering the outside of the heating box 4; the left end of the test cylinder body 2 passes through the heating box 4 and is inserted into the insulation device 6.

[0079] Specifically, the heating box 4 includes a rectangular box 4.1 with an open top; the interior of the rectangular box 4.1 is provided with several heating mounting pipes 4.2 for placing heaters 5; a drain pipe 4.3 is connected to the rectangular box 4.1, and a drain valve 4.4 is connected to the drain pipe 4.3; cylindrical mounting holes 4.5 are respectively opened at both ends of the rectangular box 4.1; an annular sealing structure 4.6 is provided along the cylindrical mounting holes 4.5. Figure 6-9 As shown, the rectangular box 4.1 is welded from lifting lug B-6-1, longitudinal box plate B-6-2, bottom plate B-6-5, and transverse box plate B-6-8; heater 5 placement pipe B-6-3 is the heating installation pipe 4.2; drain valve connector pipe B-6-6 is the drain pipe 4.3 with drain valve 4.4 installed; longitudinal positioning ring plate B-6-4. Before the rectangular box 4.1 is welded, threaded holes are machined along the circumference of the longitudinal positioning ring plate B-6-4. After the rectangular box 4.1 is welded, the threads are tapped once and stress relief treatment is performed. Mounting holes for the test cylinder body 2 are coaxially machined on the two transverse box plates B-6-8, ensuring that the coaxiality and dimensional tolerances meet the design requirements. A 30° guide angle for installing O-ring rubber seals is machined on the right side and right end of the threaded hole in the longitudinal positioning ring plate B-6-4, and on the right side of the mounting hole (i.e., cylinder mounting hole 4.5) in the transverse box plate B-6-8. The outer end ring surfaces of the two transverse box plates B-6-8 are machined according to the design, and several threaded holes for the conical sealing ring clamping studs B-3 are machined, with these threaded holes evenly distributed on the outer end faces of the mounting holes in the transverse box plates B-6-8 at both ends. A drain valve B-7 is installed on the drain valve connector pipe B-6-6 of the heating chamber 4, and the drain valve 4.4 connecting pipe B-8 is connected to the outlet of drain valve B-7. Install the longitudinal positioning cylindrical head hexagonal screw B-5 into the screw hole of the longitudinal positioning ring plate B-6-4, and install all the conical sealing ring clamping studs B-3 into the screw holes on both ends of the rectangular box 4.1.

[0080] Furthermore, such as Figure 11-14The insulation device 6 shown has a structure where the left side is a split flange insulation cover D-2. The split flange insulation cover D-2 is composed of a handle D-2-1, a left cover body D-2-2, a right cover body D-2-3, a locking pin D-2-4, and a locking pin seat D-2-5. The cover is filled with insulation material. The left and right insulation covers have symmetrically designed hanging pin guide holes at horizontal positions around their circumferences. A temperature sensor hole and a liquid inlet straight pipe hole are designed at the middle end face. During use, the hanging pin guide holes of the left and right insulation covers are aligned with the hanging pins G-2 at horizontal positions around the circumference of the cylinder sealing device 10. 19. Insert the insulation cover locking pin D-2-4 into the hole of the insulation cover locking seat D-2-5 to achieve closing and locking during the test; the middle part of the insulation device 6 is the box body, which consists of hinge assembly D-1, left end box plate D-3, box cover D-4, floating level gauge D-5, floating level gauge outer cover D-6, condenser D-7, right end box plate D-8, box cover support rod seat D-9, box cover support rod D-10, box cover support rod locking pin D-11, left guide angle steel D-12, left side box plate D-13, right side box plate D-14, right guide angle steel D-15, and box bottom plate D-16. Composed of -16, the left end box plate D-3 and the right end box plate D-8 each have a large hole in the upper part for the installation of the conical sealing ring circular pressure plate B-1. The left end box plate D-3 has a small hole in the lower left for the passage of the drain valve connector pipe B-6-6 of the heating box 4. The left end box plate D-13 and the right end box plate D-14 have left guide angle steel D-12 and right guide angle steel D-15 respectively installed in the upper part of the right end face. There is a long groove in the middle of the guide angle steel. There are 7 through holes (6 on the right end box plate) on the lower part of the left end box plate, which are 5mm larger than the heating element E-1 of the heater 5, for the heating element to pass through. E-1, bolts are located on both sides of the through hole for installing the split heating device 3 cover D-21. A cover support rod seat D-9 is installed in the middle of the left side panel, and a hinge assembly D-1 is installed on the top. A cover support rod seat D-9 is installed in the middle of cover D-4, and a hinge assembly D-1 is installed on the rear side. A floating level gauge D-5 and a floating level gauge cover D-6 are installed on the bottom surface of the middle left end of cover D-4, and a condenser D-7 is installed on the top of the middle right end. When cover 12.2 is opened, cover support rod D-10 is inserted into the holes of cover support rod seat D-9 from both the top and bottom.2. Insert the locking pin D-11 of the box cover support rod into the small hole at the top of the support rod to open and position the box cover D-4. The function of the floating level gauge outer cover D-6 is to prevent the floating level gauge D-5 from falling down when the box cover D-4 is opened. The right side of the insulation device 6 is a split clamp insulation cover D-17, which is composed of handle D-17-1, locking pin D-17-2, locking pin seat D-17-3, left cover body D-17-4, left bottom plate D-17-5, right bottom plate D-17-6, and right cover body D-17-7. The inside of the cover body is filled with heat insulation material. The inner cavity shape of the split clamp insulation cover D-17 is made according to the outer dimensions of the clamp device 11 and the cylinder sealing device 10. There are openings at the top of the left and right covers for the low-pressure return pipe G-1 and the high-pressure pipe K. The semi-circular hole of -11, and the long groove on the bottom surface of the left bottom plate D-17-5 and right bottom plate D-17-6 of the insulation cover allow movement on the moving roller H-27 of the clamp insulation cover. By using bolts D-18 to pass through the lugs of the left and right clamp insulation covers D-17-4 and D-17-7 and the long grooves of the left guide angle steel D-12 and right guide angle steel D-15, respectively, and installing flat washers D-19 and nuts D-20, the left and right covers D-17-4 and D-17-7 can be pushed and pulled to achieve the positioning of the left cover D-17-4 and right cover D-17-7 of the split clamp insulation cover during movement. By inserting locking pin D-17-2 into the hole of the insulation cover locking seat D-17-3, the left cover D-17-4 and right cover D-17-7 can be closed and locked during the test. The heat preservation device 6 is manufactured by a professional manufacturer and is securely installed on the outside of the heating chamber 4 to prevent heat loss from the heating chamber 4.

[0081] Furthermore, such as Figure 17 The diagram shows the structure of heater 5. Heater 5 is a tubular structure, with the heating element arranged inside the tube body 9.1.1. The middle section is the conductor conduit E-2, which guides the placement of the heater. The rear end is the junction box E-3. This is a mature product. Heaters 5 are inserted into the heater 5 placement tube B-6-3 through the through holes at the lower ends of the left side panel D-13 and the right side panel D-14 of the insulation device 6. The front end of the hole is the longitudinal section of the insulation box, which has no opening, so heaters 5 cannot exit from the front. Heaters 5 are placed in a staggered manner, one on the left and one on the right, for easy wiring. After the heaters 5 are placed, in… The lower end of the through holes on the left side panel D-13 and the right side panel D-14 are fitted with split heating device 3 covers D-21 to prevent heat loss. This design can accommodate 13 heaters 5, and the number of heaters 5 can be increased or decreased according to actual needs. When increasing the number, the corresponding heater 5 placement tubes B-6-3 must also be increased. Double-layer heater 5 placement tubes can be set. The heaters 5 are designed as individual units. When one heater 5 fails, only one heater 5 needs to be stopped, avoiding the situation where the entire heating device 3 fails and cannot work.

[0082] For the experimental setup of this technical solution, a dedicated control system can be set up on the control panel. The control panel is equipped with a display screen, a main power switch knob, an emergency stop button, a start button for heating device 3, a stop button for heating device 3, a start button for high-pressure acid pump 14.8, a stop button for high-pressure acid pump 14.8, a start button for low-pressure acid pump 14.7, a pressure relief button for high-pressure pneumatic shut-off valve 14.11, and a pressure relief button for low-pressure pneumatic shut-off valve 13.5. Additional buttons or knobs can be added as needed. The temperature control software and pressure control software are both mature software.

[0083] Installing a cylinder on the mobile device L enables non-manual movement of the mobile device L. Installing a cylinder on the cover D-4 of the insulation device 6 enables non-manual opening and closing of the cover D-4.

[0084] Since the test solution contains acidic substances, all parts in contact with the test solution must be acid-resistant and can be made of 316 stainless steel. All pipes on the manifold that can be wrapped with insulation material should be wrapped to minimize heat loss.

[0085] Example 2

[0086] This embodiment describes a pressure resistance test of a soluble bridge plug type test device for downhole applications in the petroleum industry based on this technical solution.

[0087] Using hydraulic (mechanical or thermal) methods, the soluble bridge plug I-3 of the test specimen is sealed inside the tube body 9.1.1 and enters a sealed state. The test oil casing rear cover 9.1.2 is installed at the rear end of the tube body 9.1.1. The high-pressure end cap 9.1.3 and the high-temperature resistant annular end cap sealing ring 9.1.4 of the test oil casing are installed in the sealing ring groove. The tube body 9.1.1 is placed upright. The front end of the tube body 9.1.1 is filled with test liquid A-3. The high-pressure end cap 9.1.3 is screwed into the upper end of the tube. The test oil casing high-pressure end cap 9.1.3 connector I-6, high-pressure tube I-9, high-pressure tube sleeve I-7, and high-pressure tube cap I-8 are installed sequentially on the upper end face of the high-pressure end cap 9.1.3.

[0088] The positions of each part of the soluble bridge plug type test device are in Figure 1In the prepared state, use hoisting machinery to lift the assembled test oil casing assembly 9 onto the V-shaped iron J-12 of the casing support 9.2. Rotate the pipe body 9.1.1 to position the high-pressure pipe I-9 at the top. Push the test oil casing assembly 9 toward the cylinder sealing device 10 and stop when it is about 3mm away from the conversion joint K-13. Adjust the V-shaped iron lifting adjustment hexagonal stud J-6 and the V-shaped iron left and right adjustment hexagonal screw J-14 at the bottom of the casing support 9.2 to align the high-pressure pipe I-9 with the threaded hole of the conversion joint K-13 and insert it. Tighten the high-pressure pipe cap I-8. Install the test oil casing pressure ring J-9 on the front and rear test oil casing pressure ring double-headed studs J-13 respectively, and install and tighten the pressure ring nut J-11.

[0089] Remove the cap K-6 from the cylinder sealing device 10 and the plug from the ground liquid supply device. Push the movable connecting device 15 toward the test cylinder body 2. When the tapered guide step at the front end of the casing support 9.2, the test oil casing device 9, and the cylinder sealing device 10 enters the hole of the test cylinder body 2, the longitudinal high-pressure flat pipe K-7 of the cylinder sealing device 10 on the ground also enters the high-pressure pipeline hole at the ground liquid supply device.

[0090] Insert a special steel rod into the hole of the lifting rotating nut H-12 and rotate the nut clockwise to move the clamp assembly upward. Once the trapezoidal groove of the lower clamp body H-13 contacts the lower trapezoidal step of the test cylinder body 2 and the cylinder sealing device 10, stop moving upward. Unscrew the upper clamp anti-rotation pin locking screw H-20, then remove the upper clamp anti-rotation pin H-19. Rotate the upper clamp assembly H-22 counterclockwise to lower it, so that the trapezoidal groove of the upper clamp assembly H-22 contacts the test cylinder body 2 and the cylinder sealing device 10. Contact the upper trapezoidal step, rotate the fastening bolt H-1 clockwise into the groove at the left end of the upper clamp body H-22-1, install the spherical flat washer H-3 on the fastening bolt H-1, screw in and tighten the spherical nut H-2, and again use a special steel rod to insert into the hole of the lifting rotating nut H-12 and tighten the rotating nut H-12 clockwise to eliminate the gap between the rotating nut H-12 and the heat insulation pad H-11 of the lifting screw tube, and tighten the high pressure pipe cap K-10 of the cylinder sealing device 10 to realize the connection between the pit high pressure pipeline and the ground high pressure pipeline.

[0091] Remove the connecting pin K-5 of the cylinder sealing device 10, push the movable connecting device 15 backward, and the cylinder sealing device 10 will separate from the movable connecting device 15. Push the movable connecting device 15 backward to the movable stop C-3 of the skid-mounted guide rail device 1.

[0092] Push the left cover D-2-2 and the right cover D-2-3 of the insulation device 6 from both ends toward the middle. After the cover completely covers the clamp device 11, install the locking pin D-2-4 on the locking pin seat D-2-5.

[0093] Close the high-pressure manual shut-off valve 14.12, and keep the high-pressure pneumatic shut-off valve 14.11 in the normally closed state. The high-pressure pressure sensor A-12 is connected to the data acquisition system on the control panel. Press the start button for the high-pressure acid pump 14.8 on the control panel. The high-pressure acid pump 14.8 inputs pressure test fluid A-3 into the test oil casing device 9. When the pressure rises to half of the rated test pressure, press the stop button for the high-pressure acid pump 14.8, open the high-pressure manual shut-off valve 14.12 (or the high-pressure pneumatic shut-off valve 14.11) to release the pressure. Repeat this process three times (or more). After purging the air from the test oil casing device 9, close the high-pressure manual shut-off valve 14.12 (or the high-pressure pneumatic shut-off valve 14.11).

[0094] Press the button on the control device to turn on the power of the heating device 3 to heat the heat transfer oil 8. The temperature data is collected by the temperature sensor G-5 installed in the test cylinder head G-16 (the temperature at this time is the temperature of the air inside the test cylinder head G-16). When the temperature rises to the upper limit of the set temperature, the system automatically disconnects the circuit to stop heating. When the temperature drops to the lower limit of the set temperature, the system automatically connects the circuit to start heating.

[0095] Press the start button for high-pressure acid pump 14.8 on the control panel. High-pressure acid pump 14.8 will input pressure test fluid A-3 into the test oil casing device 9. After reaching the rated working pressure, press the stop button for high-pressure acid pump 14.8 to stop its operation. The pressure stabilization time should be ≥15 minutes. Retain the pressure curve and temperature curve. Analyze the pressure curve. The test is considered qualified if the pressure drop is not greater than 1% of the rated working pressure. Open the high-pressure manual shut-off valve 14.12 (or the high-pressure pneumatic shut-off valve 14). 11) Release the pressure, press the stop button on the heating device 3 to stop heating, put on heat-resistant gloves, open the cover D-4 of the insulation device, install the cover support rod D-10, insert the cover support rod locking pin D-11 on the support rod, pull the left cover D-2-2 and the right cover D-2-3 of the insulation device 6 to both sides to fully open the clamp device 11, remove the split flange insulation cover D-2, and fully open the test cylinder end flange G-16 to cool down the heat transfer oil 8 inside the chamber.

[0096] Example 3

[0097] This embodiment describes a test device for soluble bridge plugs used in petroleum industry downhole applications based on this technical solution, conducting tests on effective sealing time and complete dissolution time.

[0098] If the pressure resistance test is passed, the positions of all parts of the device remain unchanged. The liquid outlet shut-off valve 12.12 on the tank cover is in the open state, the low-pressure pneumatic shut-off valve 13.5 is in the closed state, and the low-pressure pressure sensor A-16 is connected to the data acquisition system. When the temperature sensor G-5 inside the test cylinder head G-16 collects a temperature of approximately 90°C (under operating temperatures M and H), put on heat-resistant gloves, remove the locking pin D-11 and the support rod D-10 of the tank cover, and close the tank cover 12.2. Press the start button for the low-pressure acid pump 14.7 on the control panel to pump the test solution A-3 into the manifold and the test cylinder body 2 using the low-pressure acid pump 14.7. The test solution A-3 enters the test cylinder body 2 from the test cylinder head inlet straight pipe G-17 at the bottom of the test cylinder head G-16, flows from the upper right end of the test cylinder body 2 to the liquid outlet shut-off valve 12.12 on the tank cover, and then flows back into the test solution tank 12. When the manifold and test cylinder body 2 are filled with test liquid, press the stop button of low-pressure acid pump 14.7 to stop the operation of low-pressure acid pump 14.7, close the liquid outlet shut-off valve 12.12 on the tank cover, and push the left cover D-2-2 and right cover D-2-3 of the insulation device 6 from both ends toward the middle. After the cover completely covers the clamp device 11, install the locking pin D-2-4 on the locking pin seat D-2-5, and install the split flange insulation cover D-2 on the test cylinder end flange G-16.

[0099] Press the button on the control device to turn on the power of the heating device 3 to heat the heat transfer oil 8 in the heating chamber 4. The temperature sensor G-5 installed in the test cylinder head G-16 collects the temperature data of the test liquid A-3. When the temperature rises to the upper limit of the set temperature, the system automatically disconnects the circuit to stop heating. When the temperature drops to the lower limit of the set temperature, the system automatically connects the circuit to start heating.

[0100] Press the start button for high-pressure acid pump 14.8 on the control panel. High-pressure acid pump 14.8 will input pressure test fluid A-3 into the test oil casing device 9. After reaching the rated working pressure, press the stop button for high-pressure acid pump 14.8 to stop its operation and continue pressure stabilization. The control panel data acquisition system records the time interval from the start of pressure stabilization to the occurrence of a sharp pressure drop. This time should meet the requirements of the effective sealing time in the main technical specifications table of the soluble bridge plug. Continue soaking the soluble bridge plug until the required dissolution time in the main technical specifications table of the soluble bridge plug is reached, then stop the dissolution process. The control panel data acquisition system records the test temperature from the start of pressure stabilization to the achievement of the required dissolution time.

[0101] After the test is completed, press the stop button on heating device 3 to stop heating. Open the high-pressure manual shut-off valve 14.12 (or high-pressure pneumatic shut-off valve 14.11) on the cover 12.2 to release the high-pressure manifold pressure. Open the low-pressure manual shut-off valve 13.6 (or low-pressure pneumatic shut-off valve 13.5) to release the low-pressure manifold pressure. Put on heat-resistant gloves, open the insulation box cover D-4, install the insulation box cover D-4 support rod D-10, and insert the support rod locking pin D-11 on the support rod. Pull the left cover D-2-2 and the right cover D-2-3 in the insulation device to both sides to fully open the clamp device 11. Remove the split flange insulation cover D-2 to fully open the test cylinder end flange G-16 and cool the heat transfer oil 8 inside the box.

[0102] Close the outlet valve 12.12 at the left end of the test liquid tank 12 (to prevent the test liquid in the storage tank 12.1 from flowing down when discharging the test liquid A-3 from the test cylinder body 2), put on heat-resistant gloves, connect a container to the lower end of the outlet pipe K-19 of the relief valve, open the relief valve K-18, discharge the test liquid A-3 from the test cylinder body 2 into the container, and then pour the liquid in the container onto a 4mm×4mm filter screen for filtration, leaving the residue.

[0103] Push the movable connecting device 15 forward so that the connecting block L-1 is inserted into the groove at the rear end of the cylinder sealing device 10. Insert the connecting pins K-5 respectively, so that the movable connecting device 15 is connected to the test cylinder sealing device K-. Use the container to connect to the high-pressure right-angle two-way valve at the ground, loosen the high-pressure pipe cap K-10, and realize the connection and disconnection between the high-pressure pipeline in the pit and the high-pressure pipeline on the ground.

[0104] Wearing heat-resistant gloves, loosen the spherical nut H-2, turn the fastening bolt H-1 counterclockwise away from the slot at the left end of the upper clamp body H-22-1 and lower it, turn the upper clamp assembly H-22 clockwise to 90°, put on the clamp anti-rotation pin H-19, screw on the upper clamp anti-rotation pin locking screw H-20, use a special steel rod to insert into the hole of the lifting rotating nut H-12 and rotate the lifting rotating nut H-12 counterclockwise to move the clamp assembly downward. After the trapezoidal groove of the lower clamp body H-13 is completely away from the lower trapezoidal step of the test cylinder body 2 and the cylinder sealing device 10, stop rotating the steel rod.

[0105] Push the movable connecting device 15 backward to the movable stop C-3 of the skid-mounted guide rail device 1, use the plug to block the high-pressure right-angle two-way threaded hole of the high-pressure pipe connection on the ground, use the plug cap K-6 to block the outlet of the high-pressure pipe K-7, disassemble and remove the test oil casing device 9, remove the movable stop C-3, and then push the movable connecting device 15 backward to the fixed stop angle steel C-2-4.

[0106] Use a container connected to the outlet of the test cylinder body 2 to collect the residue inside the cylinder cavity, and then collect the residue in the liquid receiving box C-1-5. Place it on a 4mm×4mm filter screen for sieving, and weigh all the filtered residue. The proportion of its mass to the total mass of the soluble bridge plug should not be greater than 5% to be considered qualified.

[0107] If water replenishment is required during the test, heating must be interrupted. Pull the left cover D-2-2 and right cover D-2-3 of the insulation device 6 to both sides, fully opening the clamp device 11. Remove the split flange insulation cover D-2, fully opening the test cylinder end flange G-16. Open the insulation box cover D-4 for heat dissipation. The test can only proceed if the temperature sensor G-5 detects that the temperature of the test liquid inside the test cylinder G-16 is below 95°C (if the temperature of the test liquid is ≥100°C, the test liquid will boil). Open the liquid filling cap 12.5 on the ground supply device tank cover 12.2, and add water through this opening. After adding water, replace the liquid filling cap 12.5 on 9.1.2, and then begin the circulation of test liquid A-3 inside the test cylinder G-16.

[0108] Implementation 4

[0109] This embodiment describes a type testing device for soluble bridge plugs used in petroleum industry downhole applications, based on this technical solution, for non-drilling rapid dissolution testing:

[0110] Drain all the test liquid from the ground supply device, prepare a new drill-free quick-dissolving test liquid A-3, and put the drill-free quick-dissolving test liquid A-3 into the test liquid tank 12.

[0111] Using hydraulic (mechanical or thermal) methods, the soluble bridge plug I-3 of the test specimen is sealed inside the tube body 9.1.1 on the ground and enters a sealed state. The test oil casing rear cover 9.1.2 is installed at the rear end of the tube body 9.1.1. The high-pressure end cap 9.1.3 and the high-temperature resistant annular end cap sealing ring 9.1.4 of the test oil casing are installed in the sealing ring groove. The tube body 9.1.1 is placed upright. The front end of the tube body 9.1.1 is filled with the drill-free quick-dissolving test liquid A-3. The high-pressure end cap 9.1.3 is screwed into the upper end of the tube. The test oil casing high-pressure end cap 9.1.3 connector I-6, high-pressure tube I-9, high-pressure tube sleeve I-7, and high-pressure tube cap I-8 are installed sequentially on the upper end face of the high-pressure end cap 9.1.3.

[0112] The positions of each part of the soluble bridge plug type test device are in Figure 1In the prepared state, use hoisting machinery to lift the assembled test oil casing assembly 9 onto the V-shaped iron J-12 of the casing support 9.2. Rotate the pipe body 9.1.1 to position the high-pressure pipe I-9 at the top. Push the test oil casing assembly 9 toward the cylinder sealing device 10 and stop when it is about 3mm away from the conversion joint K-13. Adjust the V-shaped iron lifting adjustment hexagonal stud J-6 and the V-shaped iron left and right adjustment hexagonal screw J-14 at the bottom of the casing support 9.2 to align the high-pressure rigid pipe I-9 with the conversion joint K-13 and install it. Tighten the high-pressure pipe pressure cap I-8. Install the test oil casing pressure ring J-9 on the front and rear test oil casing pressure ring double-headed studs J-13 respectively, and install and tighten the pressure ring nut J-11.

[0113] Remove the cap K-6 from the cylinder sealing device 10 and the plug from the ground liquid supply device. Push the movable connecting device 15 toward the test cylinder body 2. When the tapered guide step at the front end of the casing support 9.2, the test oil casing device 9, and the cylinder sealing device 10 enters the hole of the test cylinder body 2, the longitudinal high-pressure flat pipe K-7 of the cylinder sealing device 10 on the ground also enters the pressure relief pipeline at the ground liquid supply device.

[0114] Insert a special steel rod into the hole of the lifting rotating nut H-12 and rotate the nut clockwise to move the clamp assembly upward. Once the trapezoidal groove of the lower clamp body H-13 contacts the lower trapezoidal step of the test cylinder body 2 and the cylinder sealing device 10, stop moving upward. Unscrew the upper clamp anti-rotation pin locking screw H-20, then remove the upper clamp anti-rotation pin H-19. Rotate the upper clamp assembly H-22 counterclockwise to lower it, so that the trapezoidal groove of the upper clamp assembly H-22 contacts the test cylinder body 2 and the cylinder sealing device 10. Contact the upper trapezoidal step, rotate the fastening bolt H-1 clockwise into the groove at the left end of the upper clamp body H-22-1, install the spherical flat washer H-3 on the fastening bolt H-1, screw in and tighten the spherical nut H-2, and again use a special steel rod to insert into the hole of the lifting rotating nut H-12 and tighten the rotating nut H-12 clockwise to eliminate the gap between the rotating nut H-12 and the heat insulation pad H-11 of the lifting screw tube, and tighten the high pressure pipe cap K-10 of the cylinder sealing device 10 to realize the connection between the pit high pressure pipeline and the ground high pressure pipeline.

[0115] Remove the connecting pin K-5 of the cylinder sealing device 10, push the movable connecting device 15 backward, and the cylinder sealing device 10 will separate from the movable connecting device 15. Push the movable connecting device 15 backward to the movable stop C-3 of the skid-mounted guide rail device 1.

[0116] Push the left cover D-2-2 and the right cover D-2-3 of the insulation device 6 from both ends toward the middle. After the cover completely covers the clamp device 11, install the locking pin D-2-4 on the locking pin seat D-2-5.

[0117] Close the high-pressure manual shut-off valve 14.12 on the tank cover, and keep the high-pressure pneumatic shut-off valve 14.11 in the normally closed state. The high-pressure pressure sensor A-12 is connected to the data acquisition system on the control panel. Press the start button for the high-pressure acid pump 14.8 on the control panel. The high-pressure acid pump 14.8 inputs pressure test fluid A-3 into the test oil casing device 9. When the pressure rises to half of the rated test pressure, press the stop button for the high-pressure acid pump 14.8 and open the high-pressure manual shut-off valve 14.12 (or the high-pressure pneumatic shut-off valve 14.11) to release the pressure. Repeat this process three times (or more). After the air in the test oil casing device 9 is expelled, close the high-pressure manual shut-off valve 14.12 (or the high-pressure pneumatic shut-off valve 14.11).

[0118] Press the button on the control device to turn on the power of the heating device 3 to heat the heat transfer oil 8. The temperature data is collected by the temperature sensor G-5 installed in the test cylinder head G-16 (the temperature at this time is the temperature of the air inside the test cylinder head G-16). When the temperature rises to the upper limit of the set temperature, the system automatically disconnects the circuit to stop heating. When the temperature drops to the lower limit of the set temperature, the system automatically connects the circuit to start heating.

[0119] Press the start button for high-pressure acid pump 14.8 on the control panel. High-pressure acid pump 14.8 will input pressure test fluid A-3 into the test oil casing device 9. After reaching the rated working pressure, press the stop button for high-pressure acid pump 14.8 to stop its operation and maintain pressure stabilization. The control panel data acquisition system records the time interval from the start of the rapid dissolution method to the occurrence of pressure unsealing. When the soluble bridge plug unsealing occurs, the rapid dissolution test is terminated. The rapid dissolution test should meet the requirement that unsealing does not exceed 24 hours.

[0120] After the test is completed, press the stop button on heating device 3 to stop heating. Open the high-pressure manual shut-off valve 14.12 (or high-pressure pneumatic shut-off valve 14.11) on the cover 12.2 to release the high-pressure manifold pressure. Open the low-pressure manual shut-off valve 13.6 (or low-pressure pneumatic shut-off valve 13.5) on the cover 12.2 to release the low-pressure manifold pressure. Put on heat-resistant gloves, open the insulation device cover D-4, install the cover support rod D-10, and insert the cover support rod locking pin D-11 on the support rod. Pull the left cover D-2-2 and right cover D-2-3 of the insulation device 6 to both sides to fully open the clamp device 11. Remove the split flange insulation cover D-2 to fully open the test cylinder end flange G-16 and cool the heat transfer oil 8 in the heating chamber.

[0121] Close the outlet valve 12.12 at the left end of the test liquid tank 12 (to prevent the test liquid A-3 in the storage tank 12.1 from flowing down when discharging the test liquid A-3 in the test cylinder body 2), put on heat-resistant gloves, connect a container to the lower end of the outlet pipe K-19 of the relief valve, open the relief valve K-18, discharge the test liquid A-3 in the test cylinder body 2 into the container, and then pour the liquid in the container onto a 4mm×4mm filter screen for filtration, leaving the residue.

[0122] Push the movable connecting device 15 forward so that the connecting block L-1 is inserted into the groove at the rear end of the cylinder sealing device 10. Insert the connecting pins K-5 respectively, so that the movable connecting device 15 is connected to the test cylinder sealing device K-. Use the container to connect to the high-pressure right-angle two-way valve at the ground, loosen the high-pressure pipe cap K-10, and realize the connection and disconnection between the high-pressure pipeline in the pit and the high-pressure pipeline on the ground.

[0123] Wearing heat-resistant gloves, loosen the spherical nut H-2, turn the fastening bolt H-1 counterclockwise away from the slot at the left end of the upper clamp body H-22-1 and lower it, turn the upper clamp assembly H-22 clockwise to 90°, put on the clamp anti-rotation pin H-19, screw on the upper clamp anti-rotation pin locking screw H-20, use a special steel rod to insert into the hole of the lifting rotating nut H-12 and rotate the lifting rotating nut H-12 counterclockwise to move the clamp assembly downward. After the trapezoidal groove of the lower clamp body H-13 is completely away from the lower trapezoidal step of the test cylinder body 2 and the cylinder sealing device 10, stop rotating the steel rod.

[0124] Push the movable connecting device 15 backward to the movable stop C-3 of the skid-mounted guide rail device 1, use the plug to block the high-pressure right-angle two-way threaded hole of the high-pressure pipe connection on the ground, use the plug cap K-6 to block the outlet of the high-pressure pipe K-7, disassemble and remove the test oil casing device 9, remove the movable stop C-3, and then push the movable connecting device 15 backward to the fixed stop angle steel C-2-4.

[0125] Use a container connected to the outlet of the test cylinder body 2 to collect the residue inside the cylinder cavity, and then collect the residue in the liquid receiving box C-1-5. Place it on a 4mm×4mm filter screen for sieving, and weigh all the filtered residue. The proportion of its mass to the total mass of the soluble bridge plug should not be greater than 5% to be considered qualified.

[0126] If water replenishment is required during the test, heating must be interrupted. Pull the left cover D-2-2 and right cover D-2-3 of the insulation device 6 to both sides, fully opening the clamp device 11. Remove the split flange insulation cover D-2, fully opening the test cylinder end flange G-16. Open the insulation box cover D-4 for heat dissipation. The test can only proceed if the temperature sensor G-5 detects that the temperature of the test liquid inside the test cylinder G-16 is below 95°C (if the temperature of the test liquid is ≥100°C, the test liquid will boil). Open the liquid filling cap 12.5 on the ground supply device tank cover 12.2, and add water through this opening. After adding water, replace the liquid filling cap 12.5 on 9.1.2, and then begin the circulation of test liquid A-3 inside the test cylinder G-16.

Claims

1. A type testing device for soluble bridge plugs used in petroleum industry downholes, characterized in that: Includes a ground-based liquid supply device, an underground test cylinder device, a skid-mounted guide rail device (1), and a mobile connection device (15). The underground test cylinder device is installed on the left side of the top of the skid-mounted guide rail device (1), including the test cylinder body (2), heating device (3), test oil casing device (9), cylinder sealing device (10) and clamp device (11); the central axis of the test cylinder body (2) is parallel to the top of the skid-mounted guide rail device (1); the heating device (3) is inserted into the left end of the test cylinder body (2), and a low-pressure liquid inlet structure (2.2) is provided; the right end of the test cylinder body (2) is open, and a liquid outlet structure (2.1) is provided near the right end of the test cylinder body (2). The heating device (3) includes a heating box (4), a heater (5), and a heat preservation device (6); the heating box (4) includes a rectangular box (4.1) with an open top, and several heating installation pipes (4.2) are arranged inside the rectangular box (4.1), and the heater (5) is arranged in the heating installation pipes (4.2); the inner wall of the heating box (4) and the outer wall of the test cylinder body (2) cooperate to form an annular sealed oil cavity (7), and the annular sealed oil cavity (7) is filled with heat transfer oil (8); the heat preservation device (6) is wrapped around the outside of the heating box (4), and the left end of the test cylinder body (2) passes through the heating box (4) and is inserted into the heat preservation device (6); The movable connecting device (15) is located on the right side of the test cylinder body (2) and is linearly slidably connected to the skid-mounted guide rail device (1) along the axial direction of the corresponding test cylinder body (2); the cylinder sealing device (10) is detachably installed on the movable connecting device (15), and a high-pressure channel assembly (10.1) is provided on the cylinder sealing device (10). The right end of the test oil casing device (9) is detachably and sealed to the high-pressure channel assembly (10.1), and the left end of the test oil casing device (9) is slidably connected to the inner wall of the test cylinder body (2); the clamp device (11) is fixedly installed on the skid-mounted guide rail device (1) corresponding to the open end of the test cylinder body (2) to make the cylinder sealing device (10) and the test cylinder body (2) detachably and securely connected. The ground-based liquid supply device includes a test liquid tank (12) for storing the test liquid and a test manifold unit for controlling the test pressure; the test manifold unit includes a return pipe (13), a pressure relief pipe (14) and several pipe body fixing seats (16) for fixing the return pipe (13) and the pressure relief pipe (14); the low-pressure liquid inlet structure (2.2) and the high-pressure channel assembly (10.1) are connected to the test liquid tank (12) through the pressure relief pipe (14); the liquid outlet structure (2.1) is connected to the test liquid tank (12) through the return pipe (13).

2. The soluble bridge plug type testing device for petroleum industry downhole applications as described in claim 1, characterized in that: A drain pipe (4.3) is connected to the rectangular box (4.1), and a drain valve (4.4) is connected to the drain pipe (4.3).

3. The soluble bridge plug type testing device for petroleum industry downhole applications as described in claim 1, characterized in that: The rectangular box (4.1) has cylindrical mounting holes (4.5) at both ends; an annular sealing structure (4.6) is provided along the cylindrical mounting holes (4.5).

4. The soluble bridge plug type testing device for downhole applications in the petroleum industry as described in claim 1, characterized in that: The return pipeline (13) includes a return main body (13.1), and a first low-pressure cannula (13.2), a second low-pressure cannula (13.3), and a low-pressure overflow pipe (13.8) inserted into the test liquid tank (12). One end of the reflux main body (13.1) is connected to the liquid outlet structure (2.1), and the other end is connected to the low-pressure overflow pipe (13.8) through a right-angle two-way valve. The first low-pressure cannula (13.2) and the second low-pressure cannula (13.3) are respectively connected to the return main body (13.1) through a T-shaped tee, and the second low-pressure cannula (13.3) is located between the first low-pressure cannula (13.2) and the low-pressure overflow pipe (13.8); A first pressure measuring device (13.4) is connected to the main return pipe (13.1), and a first low-pressure intubation tube (13.2) is located between the first pressure measuring device (13.4) and the second low-pressure intubation tube (13.3); A low-pressure pneumatic shut-off valve (13.5) is connected to the first low-pressure intubation tube (13.2), a low-pressure manual shut-off valve (13.6) is connected to the second low-pressure intubation tube (13.3), and an overflow valve (13.7) is connected to the low-pressure overflow pipe (13.8).

5. The soluble bridge plug type testing device for downhole applications in the petroleum industry as described in claim 1, characterized in that: The pressure relief pipeline (14) includes a pressure relief main body (14.1), a pressure relief branch body (14.2), a liquid guide body (14.3), and a first high-pressure insertion tube (14.4) and a second high-pressure insertion tube (14.5) inserted into the test liquid tank (12). The two ends of the pressure relief main body (14.1) are respectively connected to the high-pressure channel assembly (10.1) and the low-pressure liquid inlet structure (2.2); on the pressure relief main body (14.1), from the end connected to the low-pressure liquid inlet structure (2.2) to the end connected to the high-pressure channel assembly (10.1), a low-pressure check valve (14.6), a low-pressure acid pump (14.7), a high-pressure acid pump (14.8) and a high-pressure check valve (14.9) are connected in sequence. One end of the pressure relief branch pipe (14.2) is connected to the pressure relief main pipe (14.1) via a T-shaped tee, and the other end of the pressure relief branch pipe (14.2) is connected to the second high-pressure inlet pipe (14.5) via a right-angle tee. The first high-pressure inlet pipe (14.4) is connected to the pressure relief branch pipe (14.2) via a T-shaped tee. The pressure relief branch pipe (14.2) is connected to a second pressure measuring device (14.10), and the first high-pressure inlet tube (14.4) is located between the second pressure measuring device (14.10) and the second high-pressure inlet tube (14.5); A high-pressure pneumatic shut-off valve (14.11) is connected to the first high-pressure inlet tube (14.4), and a high-pressure manual shut-off valve (14.12) is connected to the second high-pressure inlet tube (14.5). One end of the liquid guide tube (14.3) is connected to the pressure relief main tube (14.1) via a T-shaped tee, and the other end is connected to the bottom or side of the test liquid tank (12); a filter (14.13) and a liquid outlet shut-off valve (14.14) are connected to the liquid guide tube (14.3).

6. The petroleum industry downhole soluble bridge plug type testing device as described in claim 1, characterized in that: The test liquid tank (12) includes a liquid storage tank body (12.1) with an open top and a tank cover (12.2). An extended platform (12.3) is arranged circumferentially along the edge of the tank opening of the liquid storage tank body (12.1), and a platform baffle (12.4) is arranged around the extended platform (12.3). The cover (12.2) is located on the top of the liquid storage tank (12.1) and is securely connected to the extended platform (12.3); The box cover (12.2) has a liquid filling port and several tube insertion holes. The liquid filling port is equipped with a liquid filling cap (12.5), and the tube insertion holes are equipped with a hole cap with a central tube through hole.

7. The soluble bridge plug type testing device for downhole applications in the petroleum industry as described in claim 1, characterized in that: The test oil casing device (9) includes a casing body (9.1) and a casing support (9.2). The cannula body (9.1) includes a tube for placing the soluble bridge plug being tested. 9.1.1) One end of the pipe body (9.1.1) is provided with a rear cover (9.1.2), and the other end of the pipe body (9.1.1) is provided with a high-pressure end cap (9.1.3). The high-pressure end cap (9.1.3) is provided with an annular end cap sealing ring (9.1.4), and a high-pressure pipe assembly (9.1.5) is connected to the high-pressure end cap (9.1.3); the sleeve support (9.2) includes a support base (9.2.1), and a number of pipe fasteners (9.2.2) are provided on the top of the support base (9.2.1).

8. The soluble bridge plug type testing device for petroleum industry downhole applications as described in claim 1, characterized in that: The mobile connection device (15) includes a vehicle body, and a connecting seat for installing the cylinder sealing device (10) is provided on the top of the vehicle body.

9. The soluble bridge plug type testing device for downhole applications in the petroleum industry as described in claim 1, characterized in that: The clamp device (11) includes a lifting support (11.1), and the top of the lifting support (11.1) is provided with an operable fastening unit (11.2) for connecting the cylinder sealing device (10) and the test cylinder body (2).

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