Mechanical vertical well deviation monitoring device and method

Abstract

The invention discloses a mechanical vertical well deviation monitoring device and method.The device comprises a main connector, a flow choking component body and a flow choking ring cavity, the flow choking component body and the flow choking ring cavity are arranged on the main connector, and a flow choking ring is arranged in the flow choking ring cavity; an internal thread section is arranged at the top of the main joint, an external thread section is arranged at the bottom of the main joint, and the main joint is connected with a drilling pipe string through the thread sections; a first fluid channel and a second fluid channel which are coaxial and communicated are arranged in the main connector, the first fluid channel is communicated with the internal thread section, the inner diameter of the first fluid channel is larger than that of the second fluid channel, and the second fluid channel penetrates through the bottom of the main connector. The side wall of the main connector is provided with a groove matched with the flow blocking component body, a first flow inlet hole is formed between the groove and the first fluid channel, a first communicating hole is formed between the groove and the second fluid channel, and the flow blocking ring cavity is formed in the groove and communicates with the second fluid channel. According to the invention, tiny pressure variation can be measured on the ground, so that the well deviation range is determined.

Description

Technical Field

[0001] The invention relates to the technical field of oil drilling, and in particular to a mechanical vertical well inclination monitoring device and method. Background Art

[0002] During the drilling process, especially in the upper vertical well section, we hope to have a good wellbore quality, so it is usually necessary to monitor the well inclination. "Well inclination" is a classic problem in the drilling process. The deeper the well, the greater the harm of well inclination. For example, it may cause drill string wear, drill sticking, drill string breakage, cause the wellbore to deviate from the designed well position, and distort the geological data obtained. Ultimately, it affects the cementing quality, prolongs the drilling cycle, and increases the cost of drilling. Domestic and foreign statistics show that drilling costs generally account for about 40% of the total cost of oil and gas exploration and production.

[0003] Inclination measurement technology was developed to solve the problem of oil and gas well inclination measurement. At the beginning, it was mainly used to measure the inclination of vertical wells, that is, to measure the deviation of oil and gas wells from the plumb line to ensure the verticality of the wellbore as much as possible. Later, with the advancement of drilling technology and the need for complex oil and gas reservoir exploitation, special process wells such as directional wells and horizontal wells appeared, and corresponding measuring instruments appeared. Static measurement of well inclination refers to the measurement of the wellbore inclination and azimuth when the drill pipe stops working; dynamic measurement of well inclination refers to the measurement of the wellbore inclination and azimuth during the drilling process of the drill pipe. Compared with static measurement, dynamic measurement has a short cycle, low cost, and can be used for automatic control. It is an inevitable historical result of the development of the drilling industry.

[0004] Since the well inclination problem is inevitable, it is necessary to measure the well inclination to ensure that the well inclination is within the permitted range to avoid underground accidents. Therefore, the measurement of well inclination is an indispensable task in drilling engineering and is of great significance to controlling well inclination and ensuring wellbore quality. Summary of the invention

[0005] In view of the above problems, the present invention aims to provide a mechanical vertical well inclination monitoring device and method.

[0006] The technical solution of the present invention is as follows:

[0007] On the one hand, a mechanical vertical well deviation monitoring device is provided, comprising a main joint, a flow blocking component body and a flow blocking ring cavity arranged on the main joint, wherein a flow blocking ring is arranged in the flow blocking ring cavity;

[0008] The top of the main joint is provided with an internal thread section, and the bottom of the main joint is provided with an external thread section, and the main joint is connected to the drilling pipe string through the internal thread section and the external thread section; the main joint is provided with coaxial and interconnected fluid channel 1 and fluid channel 2, and the fluid channel 1 is connected to the internal thread section, the inner diameter of the fluid channel 1 is larger than the inner diameter of the fluid channel 2, and the fluid channel 2 runs through the bottom of the main joint; the side wall of the main joint is provided with a groove matching the main body of the flow blocking component, and an inlet hole 1 is provided between the groove and the fluid channel 1, and a connecting hole 1 is provided between the groove and the fluid channel 2, and the flow blocking ring cavity is arranged in the groove and is connected to the fluid channel 2;

[0009] The flow blocking component body is provided with a second inlet hole, a third inlet hole, a pressure-stop piston chamber, a pressure-stop spring chamber, a blind plug chamber, a movable ring chamber, a pendulum chamber, a fixed ring chamber, and a connecting hole; the pressure-stop piston chamber is provided with an inlet nozzle, a pressure-stop piston connector, and a pressure-stop piston connected in sequence; the pressure-stop spring chamber is provided with a pressure-stop spring; the blind plug chamber is provided with a blind plug; the movable ring chamber is provided with a movable ring and hydraulic oil; the pendulum chamber is provided with a connected pendulum hanger, a pendulum, and a pendulum seat; the fixed ring chamber is provided with a fixed ring; and the connecting hole connects the fixed ring chamber and the second fluid channel;

[0010] The second inlet hole is connected to the first inlet hole, the two ends of the third inlet hole are respectively connected to the second inlet hole and the inlet nozzle, and one end of the stop pressure spring is connected to the stop pressure piston;

[0011] The pressure-stopping piston chamber is connected with the communicating hole 1, and the side wall of the pressure-stopping piston chamber is provided with a communicating hole 2 and a communicating hole 3 on the same axis. The pressure-stopping piston chamber is connected with the blind plug chamber through the communicating hole 2 and the communicating hole 3, and the blind plug chamber, the movable ring chamber, the pendulum chamber, and the fixed ring chamber are coaxially arranged;

[0012] The pendulum hanger is provided with a connecting hole four, the pendulum seat is provided with a flow hole, and the fixing ring is provided with a downward one-way flow hole and an upward one-way flow hole which are arranged in parallel.

[0013] Preferably, a variable diameter fluid channel three is provided between the fluid channel one and the fluid channel two, the end of the fluid channel three with a larger inner diameter is connected to the fluid channel one, and the end of the fluid channel three with a smaller inner diameter is connected to the fluid channel two.

[0014] Preferably, the baffle component body is connected to the main joint by bolts.

[0015] Preferably, bolt holes are provided in the grooves adjacent to the inlet hole three, the connecting hole one and the flow-blocking ring cavity.

[0016] Preferably, the pressure-stop piston comprises a pressure-stop piston section 1, an upper flow ring of the pressure-stop piston, a pressure-stop piston section 2, a lower flow ring of the pressure-stop piston, and a pressure-stop piston section 3 which are connected in sequence; the outer diameters of the pressure-stop piston section 1, the pressure-stop piston section 2, and the pressure-stop piston section 3 are the same, the outer diameters of the upper flow ring of the pressure-stop piston and the lower flow ring of the pressure-stop piston are the same and are smaller than the outer diameter of the pressure-stop piston section 1; the center of the pressure-stop piston section 1 is provided with an upper flow inlet hole of the pressure-stop piston, the center of the pressure-stop piston section 3 is provided with a lower flow outlet hole of the pressure-stop piston, the upper flow ring of the pressure-stop piston is provided with an upper connecting hole of the pressure-stop piston which is connected with the upper flow inlet hole of the pressure-stop piston, and the lower flow ring of the pressure-stop piston is provided with a lower connecting hole of the pressure-stop piston which is connected with the lower flow outlet hole of the pressure-stop piston; the connecting hole 2 is arranged on the side wall of the pressure-stop piston cavity corresponding to the pressure-stop piston section 2, and the connecting hole 3 is arranged on the side wall of the pressure-stop piston cavity corresponding to the pressure-stop piston section 3.

[0017] Preferably, the upper communicating holes of the pressure-stop piston and the lower communicating holes of the pressure-stop piston are each provided with four holes and are evenly distributed.

[0018] Preferably, four connecting holes 4 are provided and are evenly distributed in the same radial direction of the pendulum pendulum.

[0019] Preferably, the pendulum comprises a pendulum upper part and a pendulum lower part which are threadedly connected.

[0020] Preferably, a sealing ring is provided on the pressure-stop piston.

[0021] On the other hand, a mechanical vertical well inclination monitoring method is also provided, which uses any one of the mechanical vertical well inclination monitoring devices described above for monitoring.

[0022] The beneficial effects of the present invention are:

[0023] The present invention can determine the range of well inclination by measuring small pressure changes on the ground. It has the advantages of being easy to operate and use, not being affected by temperature and well depth, and can be applied to vertical wells with special requirements such as deep wells and high temperatures, and is cheaper than the current inclination measurement methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a structural schematic diagram of the main joint of the mechanical vertical well deviation monitoring device of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the main body of the flow blocking component of the mechanical vertical well deviation monitoring device of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the pressure-stop piston of the mechanical vertical well deviation monitoring device of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the pendulum hanger of the mechanical vertical well deviation monitoring device of the present invention;

[0029] Figure 5 It is a schematic structural diagram of a fixing ring of a mechanical vertical well deviation monitoring device of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the flow blocking ring of the mechanical vertical well deviation monitoring device of the present invention.

[0031] Numbers in the figure:

[0032] 100-main joint, 200-blocking component body, 300-blocking ring cavity, 400-blocking ring;

[0033] 1-fluid channel 1, 2-fluid channel 2, 3-groove, 4-inlet hole 1, 5-connecting hole 1, 6-inlet hole 2, 7-inlet hole 3, 8-pressure-stop piston chamber, 9-pressure-stop spring chamber, 10-blind plug chamber, 11-movable ring chamber, 12-pendulum chamber, 13-fixed ring chamber, 14-connecting hole, 15-inlet nozzle, 16-pressure-stop piston connector, 17-pressure-stop piston, 18-pressure-stop spring, 19-blind plug, 20-movable ring, 21-pendulum hanger, 22-pendulum, 23- Pendulum seat, 24-fixing ring, 25-connecting hole two, 26-connecting hole three, 27-connecting hole four, 28-flow hole, 29-downward one-way flow hole, 30-upward one-way flow hole, 31-fluid channel three, 32-bolt hole, 33-pressure-stop piston upper flow ring, 34-pressure-stop piston lower flow ring, 35-pressure-stop piston upper flow inlet hole, 36-pressure-stop piston lower flow outlet hole, 37-pressure-stop piston upper connecting hole, 38-pressure-stop piston lower connecting hole, 39-sealing ring. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the embodiments in this application and the technical features in the embodiments can be combined with each other. It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as those generally understood by those of ordinary skill in the art to which this application belongs. The words "including" or "comprising" and the like used in the disclosure of the present invention mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0035] On the one hand, if Figure 1-6 As shown, the present invention provides a mechanical vertical well deviation monitoring device, comprising a main joint 100 and a flow blocking component body 200 and a flow blocking ring cavity 300 arranged on the main joint 100, wherein a flow blocking ring 400 is arranged in the flow blocking ring cavity 300;

[0036] The top of the main joint 100 is provided with an internal thread section, and the bottom of the main joint 100 is provided with an external thread section, and the main joint 100 is connected to the drilling pipe string through the internal thread section and the external thread section; the main joint 100 is provided with a coaxial and interconnected fluid channel 1 and fluid channel 2 2, and the fluid channel 1 is connected to the internal thread section, the inner diameter of the fluid channel 1 is larger than the inner diameter of the fluid channel 2, and the fluid channel 2 2 runs through the bottom of the main joint 100; the side wall of the main joint 100 is provided with a groove 3 matching the flow blocking component body 200, and an inlet hole 14 is provided between the groove 3 and the fluid channel 1, a connecting hole 15 is provided between the groove 3 and the fluid channel 2 2, and the flow blocking ring cavity 300 is arranged in the groove 3 and is connected to the fluid channel 2 2;

[0037] The flow blocking component body 200 is provided with an inlet hole 2 6, an inlet hole 3 7, a pressure-stop piston chamber 8, a pressure-stop spring chamber 9, a blind plug chamber 10, a movable ring chamber 11, a pendulum chamber 12, a fixed ring chamber 13, and a connecting hole 14. The pressure-stop piston chamber 8 is provided with an inlet nozzle 15, a pressure-stop piston connector 16, and a pressure-stop piston 17 connected in sequence. The pressure-stop spring chamber 9 is provided with a pressure-stop spring 18. The blind plug chamber 10 is provided with a blind plug 19. The movable ring chamber 11 is provided with a movable ring 20 and hydraulic oil. The pendulum chamber 12 is provided with a connected pendulum hanger 21, a pendulum 22, and a pendulum seat 23. The fixed ring chamber 13 is provided with a fixed ring 24. The connecting hole 14 connects the fixed ring chamber 13 with the fluid channel 2 2.

[0038] The second inlet hole 6 is connected to the first inlet hole 4, the two ends of the third inlet hole 7 are respectively connected to the second inlet hole 6 and the inlet nozzle 15, and one end of the pressure stop spring 18 is connected to the pressure stop piston 17;

[0039] The pressure-stop piston chamber 9 is connected with the communication hole 1 5. A communication hole 25 and a communication hole 3 26 are arranged on the same axis of the side wall of the pressure-stop piston chamber 9. The pressure-stop piston chamber 8 is connected with the blind plug chamber 10 through the communication hole 25 and the communication hole 3 26. The blind plug chamber 10, the movable ring chamber 11, the pendulum chamber 12 and the fixed ring chamber 13 are coaxially arranged.

[0040] The pendulum hanger 21 is provided with a connecting hole 27, the pendulum seat 23 is provided with a flow hole 28, and the fixing ring 24 is provided with a downward one-way flow hole 29 and an upward one-way flow hole 30 arranged in parallel.

[0041] In the above embodiment, in order to set the second connecting hole 25 and the third connecting hole 26, a processing hole is also provided on the main body of the baffle component. The second connecting hole 25 and the third connecting hole 26 are provided by drilling holes at the processing holes, and the processing holes are blocked after the processing is completed.

[0042] When the present invention is used, in the initial state of the mechanical vertical well deviation monitoring device, the pressure-stop piston 17 is located at the upper part of the pressure-stop piston chamber. The supporting force of the pressure-stop spring 18 is calculated by the following formula:

[0043] F1=k1 x1 (1)

[0044] In the formula: F1 is the compression force of the spring; k1 is the compression coefficient of the spring; x1 is the compression amount of the spring.

[0045] When the flow rate is throttled due to the reduction in diameter of the center tube during normal circulation, the pressure difference between the upper and lower ends of the stop piston is calculated using the Bernoulli equation:

[0046]

[0047] Where: ΔP1 is the pressure difference between the upper and lower end surfaces of the pressure-stop piston; v1 is the flow velocity on the upper end surface of the pressure piston; v2 is the flow velocity on the lower end surface of the pressure-stop piston.

[0048] The force F2 generated by the pressure difference is calculated by the following formula:

[0049] F2=ΔP1×S1 (3)

[0050] Where: S1 is the pressure-stop piston area.

[0051] During initial installation, the pre-compression amount of the pressure-stop spring 18 is set to ensure that F1 ≥ F2, thereby ensuring that the pressure-stop piston 17 is in the initial state, that is, located at the upper part of the pressure-stop piston chamber.

[0052] In a specific embodiment, a variable diameter fluid channel three 31 is provided between the fluid channel one 1 and the fluid channel two 2, and the end of the fluid channel three 31 with a larger inner diameter is connected to the fluid channel one 1, and the end of the fluid channel three 31 with a smaller inner diameter is connected to the fluid channel two 2.

[0053] In a specific embodiment, the flow blocking component body 200 is connected to the main joint 100 by bolts. Optionally, bolt holes 32 are provided in the grooves adjacent to the inlet hole 37, the connecting hole 15, and the flow blocking ring cavity 300. Optionally, three bolt holes 32 are provided adjacent to the flow blocking ring cavity 300, and are arranged around the flow blocking ring cavity 300. In addition to the bolt setting positions selected in this embodiment, bolt holes can also be provided at other positions to ensure a better fastening effect.

[0054] In a specific embodiment, the pressure-stop piston 17 includes a pressure-stop piston segment 1, an upper pressure-stop piston flow ring 33, a pressure-stop piston segment 2, a lower pressure-stop piston flow ring 34, and a pressure-stop piston segment 3 which are connected in sequence; the outer diameters of the pressure-stop piston segment 1, the pressure-stop piston segment 2, and the pressure-stop piston segment 3 are the same, the outer diameters of the upper pressure-stop piston flow ring and the lower pressure-stop piston flow ring are the same and smaller than the outer diameter of the pressure-stop piston segment 1; an upper pressure-stop piston flow inlet hole 35 is provided in the center of the pressure-stop piston segment 1, and the pressure-stop piston A lower outlet hole 36 of the pressure-stop piston is provided at the center of section three, an upper connecting hole 37 of the pressure-stop piston connected with the upper inlet hole 35 of the pressure-stop piston is provided on the upper flow ring 33 of the pressure-stop piston, and a lower connecting hole 38 of the pressure-stop piston connected with the lower outlet hole 36 of the pressure-stop piston is provided on the lower flow ring 34 of the pressure-stop piston; the connecting hole two 25 is provided on the side wall of the pressure-stop piston cavity 8 corresponding to the pressure-stop piston section two, and the connecting hole three 26 is provided on the side wall of the pressure-stop piston cavity 8 corresponding to the pressure-stop piston section three.

[0055] In a specific embodiment, four of the upper communicating holes 37 and the lower communicating holes 38 of the pressure-stopping piston are provided and are evenly distributed.

[0056] In a specific embodiment, four connecting holes 27 are provided and are evenly distributed in the same radial direction of the pendulum hanging 21.

[0057] In a specific embodiment, the pendulum 22 includes a pendulum upper portion and a pendulum lower portion which are threadedly connected.

[0058] In a specific embodiment, a sealing ring 39 is provided on the pressure-stop piston 17. In this embodiment, the sealing performance of the present invention can be enhanced by providing the sealing ring 39. In addition, in order to further enhance the sealing performance of the present invention, a sealing groove can be provided at the inlet hole 14, etc., and a sealing ring can be provided in the sealing groove.

[0059] On the other hand, a mechanical vertical well inclination monitoring method is also provided, which uses any one of the mechanical vertical well inclination monitoring devices described above for monitoring.

[0060] In a specific embodiment, the vertical well inclination monitoring device of the present invention is used to monitor the vertical well inclination, which specifically includes the following steps:

[0061] (1) A high-precision vertical pressure gauge is installed on the ground, and at least one mechanical vertical well inclination monitoring device is installed on the drilling pipe string.

[0062] (2) Stop the pump and raise the mechanical vertical well inclination monitoring device on the drilling tool to the well section to be measured. The mechanical vertical well inclination monitoring device is in the initial state. At this time, the initial position of the pressure stop piston 17 is as follows: Figure 2 As shown, the pressure-stop spring 18 pushes the pressure-stop piston 17 to the pressure-stop piston connector 16. Due to the pressure difference between the upper and lower end surfaces of the pressure-stop piston 17, it will quickly move downward to the lower end of the pressure-stop spring chamber 9. The connecting hole 25 is not connected to the blind plug chamber 10, and the connecting hole 3 26 is connected to the blind plug chamber 10. Because the movable ring 20 is restricted by the blind plug 19 and will not move, there is no fluid flow inside the tool at this time. At this time, the pressure difference between the upper and lower ends of the pressure-stop piston 17 is the pressure difference between the inlet hole 14 and the pressure-stop spring chamber 9 (the pressure-stop spring chamber 9 is connected to the center tube through the connecting hole 15).

[0063] (3) Turn on the pump to a certain designed small displacement cycle. The pressure-stop piston 17 moves downward as a whole under the action of the pressure difference until the second connecting hole 25 is connected with the blind plug cavity 10; the displacement is maintained and the connecting position remains relatively stable; if there is a well deviation, the pendulum 22 cannot completely cover the pendulum seat flow hole 28 of the pendulum seat 23, that is, the pendulum cavity 12 is connected with the fixed ring cavity 13. Enter the following action:

[0064] After the drilling fluid enters the blind plug cavity 10, it pushes the mobile ring 20 downward, and the hydraulic oil in the mobile ring cavity 11 enters the pendulum cavity 12 through the connecting hole 27 on the pendulum hanger 21, and then enters the fixed ring cavity 13 through the flow hole 28 on the pendulum seat 23, and then enters the connecting hole 14 through the downward one-way flow hole 29 of the fixed ring 24, and then enters the blocking ring cavity 300, pushing the blocking ring 400 into the center pipe. After the blocking ring 400 enters the center pipe, the flow area of ​​the center pipe becomes smaller, generating throttling pressure, so that the pressure of the surface pressure gauge changes. Through the corresponding pressure change, the well inclination at this time is measured.

[0065] (4) After measuring the well inclination, stop the pump and perform a large displacement cycle. At this time, the flow impact of the central pipe will cause the flow blocking ring 400 to shrink back, so that the fluid in the flow blocking ring cavity 300 will enter the upward one-way flow hole 30 of the fixed ring 24 through the connecting hole 14, and then enter the fixed ring cavity 13, the pendulum cavity 12 and the blind plug cavity 10, and enter the central pipe through the connecting hole 3 26, so that the flow blocking ring 400 is recovered to the initial state.

[0066] In addition, the following experiments can be conducted in the laboratory to obtain the relationship between the number of mechanical vertical well inclination monitoring devices and the well inclination range of the present invention. Specifically: install 6 mechanical vertical well inclination monitoring devices on the pipe string, circulate at a displacement of Q1 for 3-5 minutes, and record the vertical pressure P1; circulate at a displacement of Q2 for 5-10 minutes, and the displacement Q2 is less than the displacement Q1, thereby turning on the mechanical vertical well inclination monitoring device. After the mechanical vertical well inclination monitoring device is turned on, it will block the flow of the central pipe, resulting in an increase in the circulation pressure loss. Then increase the circulation displacement to Q1, record the vertical pressure P2; compare the changes in vertical pressure, and confirm the well inclination range. When the well inclination is in a certain range, the number of tools that can be opened is shown in Table 1:

[0067] Table 1 Number of tools and well deviation range

[0068] Number of tools 1 2 3 4 5 6 Well deviation range 0°-0.5° 0.5°-1.0° 1.0°-1.5° 1.5°-2.0° 2.0°-2.5° 2.5°-3.0°

[0069] It should be noted that when the well inclination reaches 3.0°, it means that the well inclination may exceed 3.0°.

[0070] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A mechanical vertical well inclination monitoring device, characterized in that: It comprises a main joint, a flow-blocking component body and a flow-blocking ring cavity arranged on the main joint, wherein a flow-blocking ring is arranged in the flow-blocking ring cavity; The top of the main joint is provided with an internal thread section, and the bottom of the main joint is provided with an external thread section, and the main joint is connected to the drilling pipe string through the internal thread section and the external thread section; the main joint is provided with coaxial and interconnected fluid channel 1 and fluid channel 2, and the fluid channel 1 is connected to the internal thread section, the inner diameter of the fluid channel 1 is larger than the inner diameter of the fluid channel 2, and the fluid channel 2 runs through the bottom of the main joint; the side wall of the main joint is provided with a groove matching the main body of the flow blocking component, and an inlet hole 1 is provided between the groove and the fluid channel 1, and a connecting hole 1 is provided between the groove and the fluid channel 2, and the flow blocking ring cavity is arranged in the groove and is connected to the fluid channel 2; The flow blocking component body is provided with a second inlet hole, a third inlet hole, a pressure-stop piston chamber, a pressure-stop spring chamber, a blind plug chamber, a movable ring chamber, a pendulum chamber, a fixed ring chamber, and a connecting hole; the pressure-stop piston chamber is provided with an inlet nozzle, a pressure-stop piston connector, and a pressure-stop piston connected in sequence; the pressure-stop spring chamber is provided with a pressure-stop spring; the blind plug chamber is provided with a blind plug; the movable ring chamber is provided with a movable ring and hydraulic oil; the pendulum chamber is provided with a connected pendulum hanger, a pendulum, and a pendulum seat; the fixed ring chamber is provided with a fixed ring; and the connecting hole connects the fixed ring chamber and the second fluid channel; The second inlet hole is connected to the first inlet hole, the two ends of the third inlet hole are respectively connected to the second inlet hole and the inlet nozzle, and one end of the pressure stop spring is connected to the pressure stop piston; The pressure-stopping piston chamber is connected with the communicating hole 1, and the side wall of the pressure-stopping piston chamber is provided with a communicating hole 2 and a communicating hole 3 on the same axis. The pressure-stopping piston chamber is connected with the blind plug chamber through the communicating hole 2 and the communicating hole 3, and the blind plug chamber, the movable ring chamber, the pendulum chamber, and the fixed ring chamber are coaxially arranged; The pendulum hanger is provided with a connecting hole four, the pendulum seat is provided with a flow hole, and the fixing ring is provided with a downward one-way flow hole and an upward one-way flow hole which are arranged in parallel.

2. The mechanical vertical well deviation monitoring device according to claim 1 is characterized in that: A variable-diameter fluid channel three is provided between the fluid channel one and the fluid channel two. The end of the fluid channel three with a larger inner diameter is connected to the fluid channel one, and the end of the fluid channel three with a smaller inner diameter is connected to the fluid channel two.

3. The mechanical vertical well deviation monitoring device according to claim 1 is characterized in that: The flow blocking component body is connected to the main joint through bolts.

4. The mechanical vertical well deviation monitoring device according to claim 3 is characterized in that: Bolt holes are arranged in the grooves adjacent to the inlet hole three, the connecting hole one and the flow blocking ring cavity.

5. The mechanical vertical well deviation monitoring device according to claim 1 is characterized in that: The pressure-stop piston includes a pressure-stop piston section 1, an upper flow ring of the pressure-stop piston, a pressure-stop piston section 2, a lower flow ring of the pressure-stop piston, and a pressure-stop piston section 3 which are connected in sequence; the outer diameters of the pressure-stop piston section 1, the pressure-stop piston section 2, and the pressure-stop piston section 3 are the same, the outer diameters of the upper flow ring of the pressure-stop piston and the lower flow ring of the pressure-stop piston are the same and are smaller than the outer diameter of the pressure-stop piston section 1; the center of the pressure-stop piston section 1 is provided with an upper flow inlet hole of the pressure-stop piston, the center of the pressure-stop piston section 3 is provided with a lower flow outlet hole of the pressure-stop piston, the upper flow ring of the pressure-stop piston is provided with an upper connecting hole of the pressure-stop piston connected with the upper flow inlet hole of the pressure-stop piston, and the lower flow ring of the pressure-stop piston is provided with a lower connecting hole of the pressure-stop piston connected with the lower flow outlet hole of the pressure-stop piston; the connecting hole 2 is arranged on the side wall of the pressure-stop piston cavity corresponding to the pressure-stop piston section 2, and the connecting hole 3 is arranged on the side wall of the pressure-stop piston cavity corresponding to the pressure-stop piston section 3.

6. The mechanical vertical well deviation monitoring device according to claim 5 is characterized in that: The upper communicating holes of the pressure-stopping piston and the lower communicating holes of the pressure-stopping piston are each provided with four and are evenly distributed.

7. The mechanical vertical well deviation monitoring device according to claim 1 is characterized in that: The communicating holes 4 are arranged in four and are evenly distributed in the same radial direction of the pendulum.

8. The mechanical vertical well deviation monitoring device according to claim 1 is characterized in that: The pendulum comprises a pendulum upper part and a pendulum lower part which are connected by threads.

9. The mechanical vertical well deviation monitoring device according to any one of claims 1 to 8, characterized in that: A sealing ring is arranged on the pressure-stopping piston.

10. A mechanical vertical well deviation monitoring method, characterized in that: The monitoring is performed using the mechanical vertical well inclination monitoring device described in any one of claims 1 to 9.

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