Air pressure simulation experiment device for horizontal well cementation

Abstract

The invention provides an air pressure simulation experiment device for well cementation of a horizontal well. The air pressure simulation experiment device comprises a first carrying table and a second carrying table fixedly connected to one side of the first carrying table. The bottom of the supporting pedestal is mounted to the top of the first carrying table through an inclination angle adjusting mechanism; the simulation shaft is arranged on the top surface of the supporting pedestal, and the supporting pedestal is provided with a mounting mechanism used for locking or unlocking the simulation shaft; the device comprises a mounting mechanism, a fluid inlet and outlet mechanism, an air inflation mechanism and a pressure release valve, and the output end of the fluid inlet and outlet mechanism, the output end of the air inflation mechanism and the pressure release valve are fixedly connected with a connecting frame arranged on one side of the mounting mechanism. The simulation shaft is synchronously connected or disconnected with the fluid inlet and outlet mechanism, the inflation mechanism and the pressure release valve. Through the arrangement of an inclination angle adjusting mechanism, a fluid inlet and outlet mechanism, an inflation mechanism and a pressure release valve, different inclination angles and air pressure environments can be provided for the simulation wellbore, and oil and gas exploitation engineering technicians can know and learn.

Description

Technical Field

[0001] This invention relates to the field of horizontal well cementing experiments, and in particular to a gas pressure simulation experimental device for horizontal well cementing. Background Technology

[0002] The horizontal well cementing gas pressure simulation experiment simulates the impact of different gas pressure conditions on the cementing effect during the cementing process of horizontal wells, so as to provide knowledge and learning for oil and gas extraction engineers and technicians to achieve efficient oil and gas resource extraction.

[0003] Currently, in traditional simulation experiments, the simulated well casings used for observation by on-site engineering technicians are mostly made of glass. Their transparency facilitates internal observation. For example, in the existing patent document "CN104863541B An Experimental Method for Simulating Cement Injection During Well Cementing," an inner tube of plexiglass and an outer tube of plexiglass are used to form the simulated well casing. However, in these existing technologies, the simulated well casing may be damaged by collisions or have debris adhering to its walls, affecting its transparency and thus hindering observation. Therefore, the simulated well casing needs to be periodically disassembled for maintenance, replacement, and cleaning to ensure its normal use. Furthermore, horizontal well experiments differ from vertical well experiments. The simulated well casing of a horizontal well has a different tilt angle between the simulation and the horizontal plane. The simulated well casing is generally fixedly installed on an angle adjustment structure, and it connects to numerous experimental pipes, increasing the difficulty of disassembling and assembling the simulated well casing. Summary of the Invention

[0004] In order to solve the technical problem that simulated wellbore is not easy to disassemble and assemble, the present invention provides a gas pressure simulation experimental device for cementing horizontal wells.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions: This invention provides a gas pressure simulation experimental device for horizontal well cementing, including a first platform and a second platform fixed to one side of the first platform; it also includes: a support pad, the bottom of which is installed to the top of the first platform via an angle adjustment mechanism; a simulated wellbore, which is placed on the top surface of the support pad, and the support pad is provided with an installation mechanism for locking or unlocking the simulated wellbore; a fluid inlet / outlet mechanism, an air filling mechanism, and a pressure relief valve, wherein the output ends of the fluid inlet / outlet mechanism, the output ends of the air filling mechanism, and the pressure relief valve are all fixed to a connecting frame provided on one side of the installation mechanism, and the installation mechanism simultaneously connects or disconnects the simulated wellbore from the fluid inlet / outlet mechanism, the air filling mechanism, and the pressure relief valve during the locking or unlocking process of the simulated wellbore.

[0006] In this technical solution, an inflation mechanism and a pressure relief valve are used to adjust the air pressure inside the simulated wellbore, and an inclination adjustment mechanism is used to adjust the angle between the simulated wellbore and the horizontal plane, providing experimental environments with different air pressures and inclination angles.

[0007] Preferably, the fluid inlet / outlet mechanism includes a storage tank, a return tank, an injection pump, a discharge pipe, a flow meter, a pressure gauge, a first hose, a first valve, a return pump, a return pipe, a second hose, and a second valve; the storage tank, return tank, injection pump, and return pump are all mounted on the top surface of the second platform; the inlet of the injection pump is fixedly connected to the storage tank; the outlet of the injection pump is fixedly connected to the discharge pipe; the discharge pipe is equipped with a flow meter and a pressure gauge; and the end of the discharge pipe furthest from the injection pump is connected to the first hose. The first hose has a first valve installed at the end away from the discharge pipe. The first valve is fixed to the connecting frame and is connected to the inlet located on one side of the simulated well shaft. The discharge port of the return pump is fixedly connected to the return tank, and the inlet of the return pump is fixedly connected to the return pipe. The end of the return pipe away from the return pump is connected to a second hose. The end of the second hose away from the return pipe has a second valve installed. The second valve is fixed to the connecting frame and is connected to the discharge port located on one side of the simulated well shaft.

[0008] In this technical solution, the fluid inlet / outlet mechanism is used to simulate the entry or exit of fluid in the wellbore.

[0009] Preferably, the inflation mechanism includes a high-pressure air pump, an air pipe, a third hose, and a third valve; the high-pressure air pump is installed on the top surface of the second platform, the air outlet of the high-pressure air pump is connected to an air pipe, the end of the air pipe away from the high-pressure air pump is connected to a third hose, the end of the third hose away from the air pipe is connected to a third valve, the third valve is fixed to the connecting frame, and the third valve is connected to an air inlet located on one side of the simulated well.

[0010] In this technical solution, the inflation mechanism is used to simulate the filling of gas into the wellbore, and in conjunction with the pressure relief valve, the pressure inside the simulated wellbore is controlled.

[0011] Preferably, an exhaust port and a pressure gauge are also provided on one side of the simulated wellbore, and the exhaust port is aligned with the pressure relief valve.

[0012] In this technical solution, the exhaust port is used to connect to the pressure relief valve, while the pressure gauge is used to monitor the gas pressure inside the simulated wellbore.

[0013] Preferably, retaining rings are fixedly connected to the port of the pressure relief valve near the simulated well shaft, the port of the first valve near the simulated well shaft, the port of the second valve near the simulated well shaft, and the port of the third valve near the simulated well shaft, and sealing gaskets are fixedly laid on the retaining rings.

[0014] In this technical solution, by designing a retaining ring and a sealing gasket, the sealing gasket is pressed tightly when the above structure is connected to the simulated wellbore, thus providing a seal for the connection.

[0015] Preferably, the tilt adjustment mechanism includes a first side plate, a second side plate, a motor, a screw, a guide rod, a movable block, a connecting rod, a first hinge seat, a second hinge seat, and a flip plate; a through groove is formed on the top surface of the first platform, the flip plate is disposed in the through groove, and one side of the flip plate is hinged to the top of the first platform via a hinge shaft; the first side plate and the second side plate are respectively located on the bottom sides of the through groove, and the tops of the first side plate and the tops of the second side plate are fixedly connected to the bottom surface of the first platform; the screw is rotatably mounted to the first side plate. A guide rod is fixedly connected between the first and second side plates. The movable block has a screw hole and a guide hole. The screw hole is threaded to the screw rod, and the guide hole is clearance-fitted to the guide rod. The motor is fixedly installed on one side of the second side plate, and the output shaft of the motor is fixedly connected to the end of the screw rod. The top of the movable block and the bottom surface of the flip plate away from the hinge axis are respectively fixedly connected to a first hinge seat and a second hinge seat. One end of the connecting rod is hinged to the first hinge seat, and the other end of the connecting rod is hinged to the second hinge seat.

[0016] In this technical solution, the tilt adjustment mechanism is used to adjust the angle between the simulated wellbore and the horizontal plane.

[0017] Preferably, the support pad is fixedly connected to the top surface of the flip plate, and the top of the support pad is provided with an arc surface adapted to simulate the embedding of a well shaft; the support pad has an inner cavity, and the installation mechanism is installed into the inner cavity.

[0018] In this technical solution, the inner cavity provides a mounting position for the mounting mechanism.

[0019] Preferably, the installation mechanism includes a telescopic drive component fixedly installed in the inner cavity, and a movable rod is fixedly connected to the output end of the telescopic drive component. The movable rod passes through a side groove opened on one side of the support pad; the portion of the movable rod outside the support pad is fixedly connected to the connecting frame.

[0020] In this technical solution, the installation mechanism moves a movable rod, which in turn moves a connecting frame, allowing the connected structure to connect or disconnect from multiple interfaces of the simulated wellbore.

[0021] Preferably, a locking rod is fixedly connected to the movable rod, a positioning block is fixedly connected to the bottom of the simulated well, a groove for inserting the positioning block is opened on the arc surface of the support pad, and the positioning block is connected to the groove with a clearance fit. A locking hole for inserting the locking rod is opened on the positioning block.

[0022] In this technical solution, when the installation mechanism drives the movable rod to move, the locking rod on it will move along with it, and locking or unlocking can be achieved by inserting into the lock hole or pulling out of the lock hole.

[0023] Preferably, the mounting mechanism further includes a first rack, a first gear, a second rack, a second gear, a timing pulley, a timing belt, and a rotating shaft; there are two rotating shafts, and the two rotating shafts are rotatably mounted to both sides of the inner cavity. Each of the two rotating shafts is fixedly sleeved with two second gears and one timing pulley. A timing belt is wound between the two timing pulleys. A vertical second rack is meshed with the left side of the second gear. The second rack passes through a bottom groove opened at the bottom of the support pad. A guide groove is opened along the length direction on the side of the second rack. A guide block is slidably connected to the guide groove and is fixedly connected to the bottom groove. An arc-shaped bracket is fixedly connected to the top of the second rack. The bracket is embedded in an arc-shaped groove opened on the top surface of the support pad. A first gear is fixedly sleeved on the rotating shaft located on the left side of the inner cavity. A first rack is arranged below the first gear. The first rack is fixedly connected to the movable rod and is arranged horizontally.

[0024] In this technical solution, the installation mechanism, through the transmission action of the first rack, the first gear, the second rack, the second gear, the synchronous pulley, the synchronous belt, and the rotating shaft, can drive the bracket to lift the simulated well shaft during the disassembly of the simulated well shaft, making it convenient to remove the simulated well shaft from the support pad.

[0025] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0026] The positive and progressive effects of this invention are as follows: The aforementioned horizontal well cementing gas pressure simulation experimental device, through the setting of an inclination adjustment mechanism, a fluid inlet / outlet mechanism, a gas filling mechanism, and a pressure relief valve, can provide different inclination angles and different gas pressure environments for the simulated wellbore, thereby generating different experimental phenomena for oil and gas extraction engineering technicians to learn from. Furthermore, through the setting of the installation mechanism, the installation mechanism can automatically lock or unlock the simulated wellbore on the support pad to facilitate the assembly and disassembly of the simulated wellbore and the inclination adjustment mechanism. While unlocking or locking, it simultaneously drives the connecting frame to move, realizing the disconnection or connection of the pipelines on the simulated wellbore and the fluid inlet / outlet mechanism, the gas filling mechanism, and the pressure relief valve, without the need for manual pipeline connection or disconnection operations, further facilitating the assembly and disassembly of the simulated wellbore. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2This is a schematic diagram of the fluid inlet / outlet mechanism and the inflation mechanism of the present invention.

[0029] Figure 3 This is a schematic diagram of the overall bottom structure of the present invention.

[0030] Figure 4 This is a schematic diagram of the tilt adjustment mechanism of the present invention.

[0031] Figure 5 This is a three-dimensional view of the internal structure of the support pad of the present invention.

[0032] Figure 6 For the present invention Figure 5 Enlarged structural diagram of section A in the middle.

[0033] Figure 7 For the present invention Figure 5 Enlarged structural diagram of section B.

[0034] Figure 8 This is a front view of the internal structure of the support pad of the present invention.

[0035] Figure 9 This is a schematic diagram of the installation mechanism of the present invention.

[0036] Figure 10 This is a schematic diagram of the structure of the retaining ring and sealing gasket of the present invention.

[0037] Explanation of reference numerals in the attached figures 1. First stage; 101. Through slot; 2. Second platform; 3. Casters; 4. Tilt adjustment mechanism; 401. First side plate; 402. Second side plate; 403. Motor; 404. Screw; 405. Guide rod; 406. Movable block; 407. Connecting rod; 408. First hinge seat; 409. Second hinge seat; 410. Flip plate; 5. Support pad; 501. Inner cavity; 502. Side groove; 503. Bottom groove; 6. Simulated well shaft; 601. Air inlet; 602. Exhaust outlet; 603. Discharge outlet; 604. Feed inlet; 605. Positioning block; 7. Fluid inlet / outlet mechanism; 701. Storage tank; 702. Return tank; 703. Feed pump; 704. Discharge pipe; 705. Flow meter; 706. First pressure gauge; 707. First hose; 708. First valve; 7081. Retaining ring; 7082. Sealing gasket; 709. Return pump; 710. Return pipe; 711. Second hose; 712. Second valve; 8. Inflation mechanism; 801. High-pressure air pump; 802. Air hose; 803. Third hose; 804. Third valve; 9. Pressure relief valve; 10. Connecting frame; 11. Mounting mechanism; 1101. Telescopic drive component; 1102. Movable rod; 1103. Locking rod; 1104. First rack; 1105. Rotating shaft; 1106. First gear; 1107. Synchronous pulley; 1108. Synchronous belt; 1109. Second gear; 1110. Second rack; 11101. Guide groove; 1111. Bracket; 12. Second pressure gauge. Detailed Implementation

[0038] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0039] like Figure 1-10 As shown, a horizontal well cementing gas pressure simulation experimental device includes a first platform 1 and a second platform 2 fixed to one side of the first platform 1; casters 3 are installed at the bottom of the first platform 1 and the second platform 2; it also includes: a support pad 5, the bottom of which is installed to the top of the first platform 1 through an angle adjustment mechanism 4; a simulated wellbore 6, which is placed on the top surface of the support pad 5, and the support pad 5 is provided with an installation mechanism 11 for locking or unlocking the simulated wellbore 6; a fluid inlet / outlet mechanism 7, an air filling mechanism 8, and a pressure relief valve 9, the output end of the fluid inlet / outlet mechanism 7, the output end of the air filling mechanism 8, and the pressure relief valve 9 are all fixed to a connecting frame 10 provided on one side of the installation mechanism 11, and the installation mechanism 11 simultaneously connects or disconnects the simulated wellbore 6 from the fluid inlet / outlet mechanism 7, the air filling mechanism 8, and the pressure relief valve 9 during the locking or unlocking process.

[0040] like Figure 2As shown, the fluid inlet / outlet mechanism 7 includes a storage tank 701, a return tank 702, an injection pump 703, an outlet pipe 704, a flow meter 705, a pressure gauge, a first hose 707, a first valve 708, a return pump 709, a return pipe 710, a second hose 711, and a second valve 712. The storage tank 701, return tank 702, injection pump 703, and return pump 709 are all mounted on the top surface of the second platform 2. The inlet 604 of the injection pump 703 is fixedly connected to the storage tank 701, and the outlet 704 of the injection pump 703 is fixedly connected to the outlet pipe 704. A flow meter 705 and a pressure gauge are installed on the outlet pipe 704. The end of the outlet pipe 704 furthest from the injection pump 703 is connected to the first hose 707. The first hose 707 has a first valve 708 installed at the end away from the discharge pipe 704. The first valve 708 is fixedly connected to the connecting frame 10 and is connected to the inlet 604 located on one side of the simulated well shaft 6. The discharge port of the return pump 709 is fixedly connected to the return tank 702, and the inlet 604 of the return pump 709 is fixedly connected to the return pipe 710. The end of the return pipe 710 away from the return pump 709 is connected to a second hose 711. The end of the second hose 711 away from the return pipe 710 is equipped with a second valve 712. The second valve 712 is fixedly connected to the connecting frame 10 and is connected to the discharge port 603 located on one side of the simulated well shaft 6.

[0041] The fluid inlet / outlet mechanism 7 is used to inject fluid into the simulated wellbore 6 and to recover fluid. During injection, the first valve 708 is opened and the second valve 712 is closed. The fluid in the storage tank 701 is drawn out by the injection pump 703, passes through the discharge pipe 704 and the first hose 707, and then enters the simulated wellbore 6 through the inlet 604 to achieve fluid injection. During recovery, the first valve 708 is closed and the second valve 712 is opened. The fluid in the simulated wellbore 6 is drawn out by the return pump 709. After passing through the discharge port 603, the second hose 711, and the return pipe 710, the fluid enters the return pump 709 and then returns to the return tank 702.

[0042] The flow meter 705 and pressure gauge are used to monitor the flow rate and pressure of the injected fluid and provide feedback.

[0043] In actual operation, multiple fluid inlet / outlet mechanisms 7 can be used to inject different fluids, such as cement slurry.

[0044] like Figure 1-2As shown, the inflation mechanism 8 includes a high-pressure air pump 801, an air pipe 802, a third hose 803, and a third valve 804. The high-pressure air pump 801 is installed on the top surface of the second platform 2. The air outlet of the high-pressure air pump 801 is connected to the air pipe 802. The end of the air pipe 802 away from the high-pressure air pump 801 is connected to the third hose 803. The end of the third hose 803 away from the air pipe 802 is connected to the third valve 804. The third valve 804 is fixed to the connecting frame 10 and is connected to the air inlet 601 located on one side of the simulated well shaft 6. An exhaust port 602 and a pressure gauge are also provided on one side of the simulated well shaft 6. The exhaust port 602 is aligned with the pressure relief valve 9.

[0045] The inflation mechanism 8, in conjunction with the pressure relief valve 9, is used to control the air pressure inside the simulated wellbore 6. Gas is injected into the air pipe 802 via the high-pressure air pump 801, and the gas enters the simulated wellbore 6 through the third hose 803 and the air inlet 601. Simultaneously, the pressure relief valve 9 releases pressure to control the air pressure. A pressure gauge is used to monitor the air pressure inside the simulated wellbore 6 and provide feedback. The control can be implemented using a control cabinet, computer, etc.

[0046] like Figure 10 As shown, retaining rings 7081 are fixedly connected to one port of the pressure relief valve 9 near the simulated well 6, one port of the first valve 708 near the simulated well 6, one port of the second valve 712 near the simulated well 6, and one port of the third valve 804 near the simulated well 6. Sealing gaskets 7082 are fixedly laid on the retaining rings 7081.

[0047] The design of the retaining ring 7081 and the sealing gasket 7082 ensures the sealing performance of the connection when the connecting frame 10 drives the above structure to be inserted with the air inlet 601, exhaust port 602, discharge port 603, and feed port 604 on the simulated well 6.

[0048] like Figure 3-4As shown, the tilt adjustment mechanism 4 includes a first side plate 401, a second side plate 402, a motor 403, a screw 404, a guide rod 405, a movable block 406, a connecting rod 407, a first hinge seat 408, a second hinge seat 409, and a flip plate 410; a through groove 101 is formed on the top surface of the platform 1 of the first carrier 1, and the flip plate 410 is disposed in the through groove 101, with one side of the flip plate 410 hinged to the top of the first carrier 1 via a hinge shaft. The first side plate 401 and the second side plate 402 are located on the bottom sides of the through groove 101, and the tops of the first side plate 401 and the second side plate 402 are both fixedly connected to the bottom surface of the platform 1 of the first carrier 1. The screw 404 is rotatably mounted to the first... A guide rod 405 is fixedly connected between the side plate 401 and the second side plate 402, and between the first side plate 401 and the second side plate 402. The movable block 406 is provided with a screw hole and a guide hole. The screw hole is threadedly connected to the screw rod 404, and the guide hole is clearance-fitted to the guide rod 405. The motor 403 is fixedly installed on one side of the second side plate 402, and the output shaft of the motor 403 is fixedly connected to the end of the screw rod 404. The top of the movable block 406 and the bottom surface of the flip plate 410 away from the hinge axis are respectively fixedly connected to the first hinge seat 408 and the second hinge seat 409. One end of the connecting rod 407 is hinged to the first hinge seat 408, and the other end of the connecting rod 407 is hinged to the second hinge seat 409.

[0049] The tilt adjustment mechanism 4 is used to adjust the angle between the simulated wellbore 6 and the horizontal plane. Specifically, the motor 403 drives the screw 404 to rotate, causing the screw 404 to be screwed into the threaded hole in the movable block 406. Combined with the guiding action of the guide rod 405 and the guide hole, this causes the movable block 406 to move left and right. As the movable block 406 moves, it pushes the connecting rod 407, which in turn pushes the tilting plate 410, causing the tilting plate 410 to flip via the hinge shaft, thereby adjusting the angle between the tilting plate 410 and the horizontal plane.

[0050] like Figure 5-9As shown, the support pad 5 is fixedly connected to the top surface of the flip plate 410, and the top of the support pad 5 is provided with an arc surface adapted to the embedding of the simulated well shaft 6; the support pad 5 has an inner cavity 501, and the mounting mechanism 11 is installed in the inner cavity 501; the mounting mechanism 11 includes a telescopic drive component 1101 fixedly installed in the inner cavity 501, and a movable rod 1102 is fixedly connected to the output end of the telescopic drive component 1101. The movable rod 1102 passes through a side groove 502 opened on one side of the support pad 5; the part of the movable rod 1102 outside the support pad 5 is connected to... The connecting frame 10 is fixedly connected; a locking rod 1103 is fixedly connected to the movable rod 1102; a positioning block 605 is fixedly connected to the bottom of the simulated well shaft 6; a groove for inserting the positioning block 605 is provided on the arc surface of the support pad 5, and the positioning block 605 is clearance-fitted with the groove; a locking hole for inserting the locking rod 1103 is provided on the positioning block 605; the mounting mechanism 11 also includes a first rack 1104, a first gear 1106, a second rack 1110, a second gear 1109, a synchronous pulley 1107, a synchronous belt 1108, and a rotating shaft 1. 105; There are two rotating shafts 1105, and the two rotating shafts 1105 are respectively rotatably installed on both sides of the inner cavity 501. Each of the two rotating shafts 1105 is fixedly sleeved with two second gears 1109 and a synchronous pulley 1107. A synchronous belt 1108 is wound between the two synchronous pulleys 1107. A vertical second rack 1110 is meshed with the left side of the second gear 1109. The second rack 1110 passes through the bottom groove 503 opened at the bottom of the support pad 5. A guide groove 11101 is opened on the side of the second rack 1110 along the length direction. The guide groove 11101 is slidably connected to a guide block, and the guide block is fixedly connected to the bottom groove 503. The top end of the second rack 1110 is fixedly connected to an arc-shaped bracket 1111. The bracket 1111 is embedded in an arc-shaped groove opened on the top surface of the support pad 5, and the bottom surface of the bracket 1111 is supported by the arc-shaped groove. A first gear 1106 is fixedly sleeved on the rotating shaft 1105 located on the left side of the inner cavity 501. A first rack 1104 is arranged below the first gear 1106. The first rack 1104 is fixedly connected to the movable rod 1102, and the first rack 1104 is arranged laterally.

[0051] Mounting mechanism 11 is used to simulate the installation of wellbore 6; such as Figure 5-9As shown, this is the simulated installation state of the well shaft 6. There is a gap between the first gear 1106 and the first rack 1104. During the disassembly operation of the simulated well shaft 6, the telescopic drive 1101 extends, causing the movable rod 1102 to move to the left. The first rack 1104, locking rod 1103, and connecting frame 10 on the movable rod 1102 all move together. The connecting frame 10 drives the first valve 708, second valve 712, third valve 804, and pressure relief valve 9 to move together, separating them from the air inlet 601, exhaust outlet 602, discharge outlet 603, and feed inlet 604. Simultaneously, the locking rod 1103 on the movable rod 1102 is pulled out of the lock hole, unlocking the shaft. After this process, the first gear 1106 and the first rack 1104 engage. Subsequently, the movable rod 1102 continues to move to the left, and the first rack 1104 moves along with the movable rod 1102. Through the meshing transmission between the first rack 1104 and the first gear 1106, the first gear 1106, the rotating shaft 1105, the synchronous pulley 1107, and the second gear 1109 on one side of the inner cavity 501 rotate together. Further through the transmission of the synchronous belt 1108, the first gear 1106, the rotating shaft 1105, the synchronous pulley 1107, and the second gear 1109 on the other side of the inner cavity 501 rotate together, so that all the second gears 1109 rotate synchronously together, driving all the second racks 1110 to move upward synchronously. The upward movement of the second racks 1110 is guided by the guide block and the guide groove 11101. The upward movement of the second racks 1110 also drives the bracket 1111 to move upward. The bracket 1111 lifts the simulated well shaft 6, so that a gap is formed between the simulated well shaft 6 and the support pad 5, which facilitates manual lifting of the bottom of the simulated well shaft 6 and its removal.

[0052] When the simulated wellbore 6 is reinstalled, by placing the simulated wellbore 6 on the bracket 1111 and aligning the positioning block 605 with the groove on the arc surface of the support pad 5, the telescopic drive 1101 is retracted, driving the movable rod 1102 to move to the right. The first rack 1104 provides meshing drive for the first gear 1106. Then, through the transmission action of the synchronous pulley 1107, synchronous belt 1108, rotating shaft 1105, second gear 1109, and second rack 1110, the bracket 1111 can be lowered until the bracket 1111 is embedded in the arc-shaped groove on the top surface of the support pad 5. The bracket 1111 is supported by the bottom surface of the arc-shaped groove. At this time, the first... The rack 1104 disengages from the first gear 1106, and the first rack 1104 is positioned to provide a meshing position when it approaches again. The simulated well shaft 6 is placed on the support pad 5, and the positioning block 605 is inserted into the groove. The subsequent moving rod 1102 continues to move to the right, so that the locking rod 1103 is inserted into the lock hole. At the same time, the connecting frame 10 is moved closer to the simulated well shaft 6, so that the first valve 708, the second valve 712, the third valve 804 and the pressure relief valve 9 are respectively connected to the feed port 604, the discharge port 603, the air inlet 601 and the exhaust port 602, and the sealing gasket 7082 is pressed to form a connection seal.

[0053] The telescopic drive component 1101 is preferably a pneumatic cylinder or a hydraulic cylinder.

[0054] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A gas pressure simulation experimental device for cementing horizontal wells, comprising a first platform (1) and a second platform (2) fixed to one side of the first platform (1); characterized in that, Also includes: Support pad (5), the bottom of which is installed to the top of the first platform (1) via tilt adjustment mechanism (4); The simulated well shaft (6) is placed on the top surface of the support pad (5), and the support pad (5) is provided with an installation mechanism (11) for locking or unlocking the simulated well shaft (6). The fluid inlet / outlet mechanism (7), the air filling mechanism (8), and the pressure relief valve (9) are all fixedly connected to the connecting frame (10) located on one side of the installation mechanism (11). During the locking or unlocking of the simulated wellbore (6), the installation mechanism (11) simultaneously connects or disconnects the simulated wellbore (6) from the fluid inlet / outlet mechanism (7), the air filling mechanism (8), and the pressure relief valve (9).

2. The gas pressure simulation experimental device for horizontal well cementing as described in claim 1, characterized in that: The fluid inlet / outlet mechanism (7) includes a storage tank (701), a return tank (702), a feed pump (703), a discharge pipe (704), a flow meter (705), a pressure gauge (706), a first hose (707), a first valve (708), a return pump (709), a return pipe (710), a second hose (711), and a second valve (712); the storage tank (701), the return tank (702), and the feed pump... (703) and the return pump (709) are both installed on the top surface of the second platform (2). The inlet (604) of the injection pump (703) is fixedly connected to the storage tank (701). The outlet of the injection pump (703) is fixedly connected to the discharge pipe (704). A flow meter (705) and a pressure gauge (706) are installed on the discharge pipe (704). The end of the discharge pipe (704) away from the injection pump (703) is connected to A first hose (707) is connected to the first hose (707). A first valve (708) is installed at the end of the first hose (707) away from the discharge pipe (704). The first valve (708) is fixed to the connecting frame (10) and is connected to the inlet (604) on one side of the simulated well (6). The discharge port of the return pump (709) is fixedly connected to the return tank (702). The inlet (604) of the return pump (709) is fixedly connected to the return pipe (710). A second hose (711) is connected at the end of the return pipe (710) away from the return pump (709). A second valve (712) is installed at the end of the second hose (711) away from the return pipe (710). The second valve (712) is fixed to the connecting frame (10) and is connected to the discharge port (603) on one side of the simulated well (6).

3. The gas pressure simulation experimental device for horizontal well cementing as described in claim 2, characterized in that: The inflation mechanism (8) includes a high-pressure air pump (801), an air pipe (802), a third hose (803), and a third valve (804). The high-pressure air pump (801) is installed on the top surface of the second platform (2). The air outlet of the high-pressure air pump (801) is connected to the air pipe (802). The end of the air pipe (802) away from the high-pressure air pump (801) is connected to the third hose (803). The end of the third hose (803) away from the air pipe (802) is connected to the third valve (804). The third valve (804) is fixed to the connecting frame (10) and is connected to the air inlet (601) located on one side of the simulated well (6).

4. The gas pressure simulation experimental device for horizontal well cementing as described in claim 3, characterized in that: The simulated wellbore (6) is also provided with an exhaust port (602) and a pressure gauge (12) on one side, and the exhaust port (602) is aligned with the pressure relief valve (9).

5. The gas pressure simulation experimental device for horizontal well cementing as described in claim 4, characterized in that: A retaining ring (7081) is fixedly connected to one port of the pressure relief valve (9) near the simulated well shaft (6), one port of the first valve (708) near the simulated well shaft (6), one port of the second valve (712) near the simulated well shaft (6), and one port of the third valve (804) near the simulated well shaft (6). A sealing gasket (7082) is fixedly laid on the retaining ring (7081).

6. The gas pressure simulation experimental device for horizontal well cementing as described in claim 1, characterized in that: The tilt adjustment mechanism (4) includes a first side plate (401), a second side plate (402), a motor (403), a screw (404), a guide rod (405), a movable block (406), a connecting rod (407), a first hinge seat (408), a second hinge seat (409), and a flip plate (410). A through groove (101) is provided on the top surface of the platform (1). The flip plate (410) is located within the through groove (101), and one side of the flip plate (410) is hinged to the top of the first platform (1) via a hinge shaft. The first side plate (401) and the second side plate (402) are located on opposite sides of the bottom of the through groove (101), and the top of the first side plate (401) and the top of the second side plate (402) are both fixedly connected to the bottom surface of the platform (1). The screw (404) is rotatably mounted to... A guide rod (405) is fixed between the first side plate (401) and the second side plate (402), and between the first side plate (401) and the second side plate (402). The movable block (406) is provided with a screw hole and a guide hole. The screw hole is threadedly connected to the screw rod (404), and the guide hole is clearance-fitted to the guide rod (405). The motor (403) is fixedly installed on one side of the second side plate (402), and the output shaft of the motor (403) is fixedly connected to the end of the screw rod (404). The top of the movable block (406) and the bottom surface of the flip plate (410) away from the hinge axis are respectively fixedly connected to the first hinge seat (408) and the second hinge seat (409). One end of the connecting rod (407) is hinged to the first hinge seat (408), and the other end of the connecting rod (407) is hinged to the second hinge seat (409).

7. The gas pressure simulation experimental device for horizontal well cementing as described in claim 1, characterized in that: The support pad (5) is fixed to the top surface of the flip plate (410), and the top of the support pad (5) is provided with an arc surface adapted to the embedding of the simulated well shaft (6); the support pad (5) has an inner cavity (501) inside, and the installation mechanism (11) is installed in the inner cavity (501).

8. The gas pressure simulation experimental device for horizontal well cementing as described in claim 7, characterized in that: The installation mechanism (11) includes a telescopic drive (1101) fixedly installed in the inner cavity (501). The output end of the telescopic drive (1101) is fixedly connected to a movable rod (1102). The movable rod (1102) passes through a side groove (502) opened on one side of the support pad (5). The part of the movable rod (1102) outside the support pad (5) is fixedly connected to the connecting frame (10).

9. The gas pressure simulation experimental device for horizontal well cementing as described in claim 8, characterized in that: A locking rod (1103) is fixedly connected to the movable rod (1102), a positioning block (605) is fixedly connected to the bottom of the simulated well (6), a groove for the positioning block (605) to be inserted is provided on the arc surface of the support pad (5), and the positioning block (605) is connected to the groove with a clearance fit, and a locking hole for the locking rod (1103) to be inserted is provided on the positioning block (605).

10. The gas pressure simulation experimental device for horizontal well cementing as described in claim 9, characterized in that: The mounting mechanism (11) further includes a first rack (1104), a first gear (1106), a second rack (1110), a second gear (1109), a synchronous pulley (1107), a synchronous belt (1108), and a rotating shaft (1105). There are two rotating shafts (1105), each rotatably mounted on both sides of the inner cavity (501). Each of the two rotating shafts (1105) is fixedly fitted with two second gears (1109) and one synchronous pulley (1107). A synchronous belt (1108) is wound between the two synchronous pulleys (1107). A vertical second rack (1110) is meshed with the left side of the second gear (1109). The second rack (1110) passes through the... The bottom groove (503) of the support pad (5) has a guide groove (11101) on the side of the second rack (1110) along the length direction. The guide groove (11101) is slidably connected to a guide block, and the guide block is fixed to the bottom groove (503). The top of the second rack (1110) is fixed to an arc-shaped bracket (1111), and the bracket (1111) is embedded in the arc-shaped groove on the top surface of the support pad (5). The first gear (1106) is fixedly sleeved on the rotating shaft (1105) located on the left side of the inner cavity (501). The first rack (1104) is provided below the first gear (1106). The first rack (1104) is fixed to the movable rod (1102), and the first rack (1104) is arranged horizontally.

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