Intelligent stepless variable-diameter centralizer, tool string and using method of tool string

Abstract

The invention discloses an intelligent stepless reducing centralizer, a tool string and a using method of the tool string. The centralizer comprises a body, a monitoring assembly arranged on the inner wall of the body, a controller arranged on the outer wall of the body and a plurality of centralizing modules. The monitoring assembly is used for monitoring relevant parameters of fluid flowing through the body in real time; the centralizing block assembly is in radial sliding connection with the outer wall of the body; the propelling assembly comprises a motor and a propelling block which are connected; the matching surface of the propelling block and the centralizing block assembly is a conical surface, so that the centralizing block assembly is radially limited under the condition that the centralizing block assembly shrinks along the radial direction under the action of external force; the controller is used for receiving relevant parameters in real time and controlling the motor to drive the propelling block to move in the axial direction based on the relevant parameters so as to adjust the minimum diameter of the centralizer under the condition that the centralizing block assembly contracts in the radial direction. The diameter of the centralizer can be intelligently adjusted, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the fields of geothermal and oil and gas drilling technology, and in particular to an intelligent continuously variable diameter stabilizer, tool string and its usage method. Background Technology

[0002] As oil and gas reservoir exploration and development deepens, the demand for drilling deep and ultra-deep wells gradually increases, leading to the encounter with more and more complex formations, such as steep structural formations, soft formations with insufficient directional support, and hard formations with poor drillability. Furthermore, the current wellbore quality assessment is becoming increasingly stringent, and wellbore trajectory control is becoming increasingly difficult. The near-bit series centralizers in the drill string assembly are crucial for trajectory control. Changing the diameter of the near-bit series centralizers can greatly increase the efficiency of wellbore trajectory control. In existing technologies, the main method for adjusting the diameter of the near-bit centralizers is to replace centralizers of different diameters during tripping. Summary of the Invention

[0003] The inventors of this application have discovered that the existing method of changing the diameter of the stabilizer by changing the stabilizer during drilling is complicated and has low production efficiency.

[0004] In view of the above problems, the present invention is proposed to provide an intelligent continuously variable diameter stabilizer, toolchain and method of using thereof that overcomes or at least partially solves the above problems.

[0005] The intelligent continuously variable diameter straightener provided in this embodiment of the invention includes: a main body, a monitoring component disposed on the inner wall of the main body, a controller disposed on the outer wall of the main body, and multiple straightening modules;

[0006] The monitoring component is used to monitor relevant parameters of the fluid flowing through the body in real time;

[0007] The straightening module includes: a straightening block assembly and two sets of propulsion components disposed at both ends of the straightening block assembly;

[0008] The straightening block assembly is radially slidably connected to the outer wall of the main body;

[0009] The propulsion assembly includes: a connected motor and a propulsion block; the mating surface between the propulsion block and the straightening block assembly is a conical surface, so as to radially limit the straightening block assembly when it contracts radially under the action of external force;

[0010] The controller is used to receive the relevant parameters in real time and control the motor to drive the propulsion block to move axially based on the relevant parameters, so as to adjust the minimum diameter that the straightener can reach when the straightening block assembly is radially contracted.

[0011] In an optional embodiment, the controller is configured to control the motor to drive the propulsion block to move axially based on the relevant parameters, so as to adjust the minimum diameter that the centralizer can achieve when the centralizer assembly contracts radially; including: the controller is configured to,

[0012] When the relevant parameters are within the corresponding first preset parameter range set, based on the relevant parameters and the pre-established correspondence between the first preset parameter range and the motor adjustment amount, the motor is controlled to drive the propulsion block backward, so as to reduce the minimum diameter that the straightener can reach when the straightening block assembly contracts radially; the first preset parameter set includes: multiple first preset parameter ranges;

[0013] When the relevant parameters are within the corresponding set of second preset parameter ranges, based on the relevant parameters and the pre-established correspondence between the second preset parameter ranges and the motor adjustment amount, the motor is controlled to drive the propulsion block forward, so as to increase the minimum diameter that the straightener can reach when the straightening block assembly contracts radially; the second preset parameter set includes: multiple second preset parameter ranges.

[0014] In an optional embodiment, the relevant parameter may be the fluid displacement or the voltage generated when the fluid flows through the monitoring component;

[0015] Accordingly, when the relevant parameter is fluid displacement, the monitoring component is a flow meter;

[0016] When the relevant parameter is the voltage generated when the fluid flows through the monitoring component, the monitoring component includes: two magnetic detection plates and two voltage monitoring plates, the magnetic detection plates and the voltage monitoring plates are alternately arranged on the inner wall of the body, and the lines connecting the magnetic detection plates are perpendicular to the lines connecting the voltage monitoring plates.

[0017] The magnetic detection sheet is used to generate a magnetic field, and the voltage monitoring sheet is used to monitor the voltage generated between the two voltage monitoring sheets when the fluid flows through the magnetic field, and transmit the voltage to the controller.

[0018] In an optional embodiment, anti-slip teeth are provided on the mating surfaces of the push block and the straightening block assembly; a plurality of springs are provided between the straightening block assembly and the outer wall of the main body;

[0019] When the straightening block assembly contracts radially under the action of external force, it compresses the spring. When the external force disappears, it expands radially under the action of the spring's restoring force, and the propelling block separates from the mating surface of the straightening block assembly with anti-slip teeth.

[0020] In an optional embodiment, the straightening block assembly includes: a straightening block and a fixing key;

[0021] The outer side of the straightening block is inlaid with a PDC composite sheet, and the inner side is provided with a first conical surface and a second conical surface. The radial dimension at the connection between the first conical surface and the second conical surface is greater than the radial dimension at both ends. Correspondingly, the propulsion blocks of the two sets of propulsion components are respectively provided with a third conical surface and a fourth conical surface. The first conical surface is used to cooperate with the third conical surface, and the second conical surface is used to cooperate with the fourth conical surface.

[0022] The fixing key is located at the connection between the first conical surface and the second conical surface; correspondingly, a fixing groove is provided on the outer wall of the main body, the fixing key is installed in the fixing groove, and its movement is radially limited by the straightening block and fixing pressure block installed on the main body; and the spring is located between the fixing key and the fixing groove.

[0023] In an optional embodiment, a plurality of the straightening modules are evenly distributed circumferentially along the outer wall of the body.

[0024] In an optional embodiment, the intelligent continuously variable diameter stabilizer provided by the present invention further includes: a power supply;

[0025] The power supply is located on the outer wall of the main body and is used to supply power to the motor and the controller.

[0026] In an optional embodiment, the motor is a stepper motor; the push block has a threaded hole on the side near the motor to cooperate with the screw of the stepper motor, and the rotation of the screw drives the push block to move axially.

[0027] In an optional embodiment, the outer wall of the main body is further provided with a power supply mounting slot and a propulsion component mounting slot;

[0028] The propulsion component is disposed in the corresponding propulsion component mounting slot and is radially positioned by the propulsion component fixing block;

[0029] The power supply is installed in the corresponding power supply mounting slot and is radially positioned by the power supply fixing block;

[0030] When the straightening module is configured in multiple ways, the number of the straightening block component, the propulsion component, the power supply, the power supply mounting slot and the propulsion component mounting slot are set accordingly, and the controller is set in one of the power supply mounting slots.

[0031] Based on the same inventive concept, this embodiment of the invention also provides an intelligent continuously variable diameter stabilizer tool string, including: a drill bit and the above-mentioned intelligent continuously variable diameter stabilizer;

[0032] The two ends of the intelligent continuously variable diameter stabilizer are respectively connected to the drill bit.

[0033] Based on the same inventive concept, embodiments of the present invention also provide a method for using the above-mentioned intelligent continuously variable diameter stabilizer, including:

[0034] Connect the intelligent continuously variable diameter stabilizer to the drill string;

[0035] The fluid flow rate injected into the drill string is changed, and relevant parameters of the fluid flowing through the body are obtained in real time through the monitoring component;

[0036] The controller receives the relevant parameters in real time and controls the motor to move the propulsion block axially based on the relevant parameters, so as to adjust the minimum diameter that the straightener can reach when the straightening block assembly contracts radially.

[0037] In an optional embodiment, the motor is controlled to move the propulsion block axially based on the relevant parameters to adjust the minimum diameter of the centralizer when the centralizer assembly contracts radially; including:

[0038] If the relevant parameters are within the first preset parameter range set, based on the relevant parameters and the pre-established correspondence between the relevant parameters and the motor adjustment amount, the motor is controlled to drive the push block backward, so as to reduce the minimum diameter that the straightener can reach when the straightening block assembly contracts radially under the action of external force;

[0039] If the relevant parameters are within the second preset parameter range set, based on the relevant parameters and the pre-established correspondence between the relevant parameters and the motor adjustment amount, the motor is controlled to drive the propulsion block forward, so as to increase the minimum diameter that the straightener can reach when the straightening block assembly contracts radially.

[0040] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0041] The intelligent continuously variable diameter stabilizer provided in this embodiment of the invention utilizes a monitoring component to monitor relevant parameters of the fluid flowing through the stabilizer body in real time. A controller then controls a motor to move the propulsion block axially based on these parameters. The propulsion block is used to radially position the stabilizer assembly when it contracts radially under external force. Since the mating surface between the propulsion block and the stabilizer assembly is conical, the motor-driven axial movement of the propulsion block allows for different minimum diameters of the stabilizer when the stabilizer assembly contracts radially under external force. In other words, the intelligent continuously variable diameter stabilizer provided in this embodiment of the invention can automatically adjust the minimum diameter of the stabilizer during drilling based on relevant fluid parameters. This avoids situations where the drill string must be pulled out due to the stabilizer diameter not meeting requirements, increases the length of composite drilling sections, improves trajectory control efficiency, and ultimately improves production timeliness.

[0042] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0043] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0044] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0045] Figure 1 This is a front view schematic diagram of the intelligent continuously variable diameter straightener in an embodiment of the present invention;

[0046] Figure 2 This is a cross-sectional schematic diagram of the intelligent continuously variable diameter straightener in an embodiment of the present invention;

[0047] Figure 3 This is an isometric schematic diagram of the intelligent continuously variable diameter straightener in an embodiment of the present invention;

[0048] Figure 4 This is a top view of the intelligent continuously variable diameter straightener in an embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of the structure of the body in an embodiment of the present invention;

[0050] Figure 6 This is a cross-sectional view of the main body in an embodiment of the present invention;

[0051] Figure 7This is a schematic diagram of the structure of the straightening block assembly in an embodiment of the present invention;

[0052] Figure 8 This is a top view of the straightening block assembly in an embodiment of the present invention;

[0053] Figure 9 This is a schematic diagram of the propulsion component in an embodiment of the present invention;

[0054] Figure 10 This is a schematic diagram of the power supply and controller in an embodiment of the present invention;

[0055] Figure 11 This is a schematic diagram of the structure of the magnetic detection sheet in an embodiment of the present invention;

[0056] Figure 12 This is a schematic diagram of the power supply fixing block in an embodiment of the present invention;

[0057] Figure 13 A schematic diagram of the structure of the straightening block and the fixing block;

[0058] Figure 14 This is a schematic diagram of the spring structure in an embodiment of the present invention;

[0059] Figure 15 This is a circuit diagram of the intelligent continuously variable diameter straightener in an embodiment of the present invention.

[0060] Explanation of reference numerals in the attached figures:

[0061] 1. Main body; 2. Monitoring component; 3. Controller; 4. Propulsion component; 5. Straightening block component; 6. Power supply; 7. Spring; 8. Propulsion component fixing block; 9. Straightening block fixing block; 10. Power supply fixing block;

[0062] 11. Actuator mounting slot; 12. Power supply fixing block slot; 13. Propulsion assembly fixing block slot; 14. Fixing slot; 21. Detecting magnetic sheet; 22. Voltage monitoring sheet; 41. Motor; 42. Screw; 43. Propulsion block; 51. Straightening block; 52. Fixing key; 53. PDC composite sheet; 54. Anti-slip teeth; 521. Spring mounting slot; 91. First pin hole; 101. Power supply fixing slot; 102. Second pin hole. Detailed Implementation

[0063] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0064] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0065] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0066] To address the problems of complex operation and low production efficiency associated with changing the stabilizer diameter during tripping and tripping in existing technologies, this invention provides an intelligent continuously variable diameter stabilizer, tool string, and its usage method. Drilling engineers can adjust the diameter of the near-bit series stabilizers according to trajectory control requirements, avoiding tripping due to insufficient stabilizer diameter. This also significantly increases the length of composite drilling sections, improves trajectory control efficiency, and enhances production efficiency. It should be noted that in this embodiment, the upper end refers to the end of the body with a female thread, and the lower end refers to the end of the body with a male thread. The diameter of the stabilizer specifically refers to its outer diameter at the stabilizer block. The fluid in this embodiment can be drilling fluid, etc.

[0067] The intelligent continuously variable diameter stabilizer provided in this embodiment of the invention refers to... Figures 1 to 4 As shown, it includes: a main body 1, a monitoring component 2 installed on the inner wall of the main body 1, a controller 3 installed on the outer wall of the main body 1, and multiple straightening modules;

[0068] Monitoring component 2 is used to monitor relevant parameters of the fluid flowing through body 1 in real time;

[0069] The straightening module includes: a straightening block assembly 5 and two sets of propulsion components 4 disposed at both ends of the straightening block assembly 5;

[0070] The straightening block assembly 5 is radially slidably connected to the outer wall of the main body 1;

[0071] The propulsion assembly 4 includes a connected motor 41 and a propulsion block 43; the mating surface between the propulsion block 43 and the centralizing block assembly 5 is a conical surface, so as to radially position the centralizing block assembly 5 when it contracts radially under the action of external force; wherein, the external force mentioned in this embodiment is specifically the wellbore thrust;

[0072] The controller 3 is used to receive relevant parameters in real time and control the motor 41 to drive the propulsion block 43 to move axially based on the relevant parameters, so as to adjust the minimum diameter that the straightener can reach when the straightening block assembly 5 is radially contracted.

[0073] The centralizer provided in this embodiment of the invention utilizes a monitoring component 2 to monitor relevant parameters of the fluid flowing through the centralizer body 1 in real time. A controller 3 then controls a motor 41 to move a propulsion block 43 axially based on these parameters. The propulsion block 43 is used to radially position the centralizer assembly 5 when it contracts radially under external force. Since the mating surface between the propulsion block 43 and the centralizer assembly 5 is conical, the motor 41 can move the propulsion block 43 axially by different distances. This allows the centralizer to have different minimum diameters when the centralizer assembly 5 contracts radially under external force. In other words, when the intelligent continuously variable diameter centralizer provided in this embodiment of the invention is applied, drilling engineers can adjust the minimum diameter of the centralizer by changing the fluid flow rate input from the wellhead according to trajectory control requirements. This avoids situations where the centralizer diameter cannot meet the requirements, increases the length of the composite drilling section, improves trajectory control efficiency, and ultimately improves production efficiency.

[0074] In this embodiment of the invention, the number of straightening modules disposed on the outer wall of the main body 1 is not specifically limited, and can be selected according to actual needs, for example... Figure 4 The diagram shows the structural configuration when three straightening modules are used. Optionally, when multiple straightening modules are used, the multiple straightening modules can be evenly distributed circumferentially along the outer wall of the body 1.

[0075] Furthermore, in this embodiment, the controller 3 is used to control the motor 41 to drive the propulsion block 43 to move axially based on relevant parameters, so as to adjust the minimum diameter that the straightener can reach when the straightening block assembly contracts radially; including: the controller 3 is used to control the motor 41 to drive the propulsion block 43 to move backward based on the relevant parameters and the pre-established correspondence between the relevant parameters and the motor adjustment amount when the relevant parameters are within a first preset parameter range set, so as to reduce the minimum diameter that the straightener can reach when the straightening block assembly 5 contracts radially; wherein, the first preset parameter range set includes: multiple first preset parameter ranges;

[0076] When the relevant parameters are within the set of the second preset parameter range, based on the relevant parameters and the pre-established correspondence between the relevant parameters and the motor adjustment amount, the motor 41 is controlled to drive the propulsion block 43 forward, so as to increase the minimum diameter that the straightener can reach when the straightening block assembly 5 contracts radially; wherein, the first preset parameter set includes: multiple second preset parameter ranges.

[0077] The motor adjustment amount may include: the rotation direction of motor 41 and the number of rotations; correspondingly, a pre-established correspondence between preset parameter ranges and motor adjustment amounts is established, that is, when the relevant parameters fall within the corresponding preset parameter range, the corresponding rotation direction and number of rotations of motor 41 need to be adjusted. Before application, the centralizer of this embodiment can pre-establish the correspondence between relevant parameters and motor adjustment amounts, that is, when the monitored relevant parameters are a certain value, the corresponding rotation direction and rotation amount of motor 41 are how much. Then, when the controller 3 receives the relevant parameters transmitted by the monitoring component 2, it can control the motor 41 to drive the propulsion block 43 forward or backward by the corresponding distance based on the relevant parameters and the pre-established correspondence between relevant parameters and motor adjustment amounts, so as to achieve precise adjustment of the minimum diameter that the centralizer can achieve. It should be noted that the correspondence between relevant parameters and motor adjustment amounts can be designed as needed, and this embodiment of the invention does not limit this. That is, when the intelligent continuously variable diameter centralizer provided in this embodiment of the invention adjusts the minimum diameter of the centralizer, it is only necessary to control the fluid discharge to ensure that the relevant parameters are within the corresponding preset parameter range when the fluid flows through the body 1. The adjustment method is simple and the adjustable range is wide.

[0078] Among them, the relevant parameters used to adjust the minimum diameter that the centralizer can reach can be: fluid displacement or voltage generated when fluid flows through monitoring component 2;

[0079] Accordingly, when the relevant parameter is fluid displacement, the monitoring component 2 installed on the inner wall of the main body 1 is a flow meter;

[0080] When the relevant parameter is the voltage generated when the fluid flows through the monitoring component 2, the monitoring component 2 includes: two magnetic detection plates 21 and two voltage monitoring plates, as referenced. Figure 3 and Figure 4 As shown, the magnetic detection sheet 21 and the voltage monitoring sheet are alternately arranged on the inner wall of the main body 1, and the line connecting the two voltage monitoring sheets is perpendicular to the line connecting the two magnetic detection sheets 21; wherein, reference Figure 11 As shown, the detection magnetic sheet 21 has an arc-shaped structure, and correspondingly, the structure of the voltage monitoring sheet 22 can be the same as that of the detection magnetic sheet 21.

[0081] The magnetic detection plate 21 is used to generate a magnetic field, and the voltage monitoring plate is used to monitor the voltage generated between the two voltage monitoring plates when the fluid flows through the magnetic field, and transmits the voltage to the controller 3.

[0082] Specifically, the relevant parameters used to control the motor adjustment amount in this embodiment of the invention can be: fluid displacement or the voltage generated when the fluid flows through the monitoring component 2. Correspondingly, when the relevant parameter is fluid displacement, the pre-established correspondence between the relevant parameter and the motor adjustment amount is specifically: the correspondence between fluid displacement and motor adjustment amount; when the relevant parameter is the voltage generated when the fluid flows through the monitoring component 2, the pre-established correspondence between the relevant parameter and the motor adjustment amount is specifically: the correspondence between the voltage generated when the fluid flows through the monitoring component 2 and motor adjustment amount. The selection of the relevant parameters can be made according to actual needs, and this embodiment of the invention does not impose specific limitations on this.

[0083] Furthermore, this embodiment of the invention does not specifically limit the number of preset parameter ranges included in each preset parameter range set, nor the specific values ​​of the first and second preset parameter ranges; these can be selected according to actual needs. The preset parameter range included in each preset parameter range set can be a range of values, a specific value, or both; this embodiment of the invention also does not limit this. For example, taking the voltage generated when fluid flows through monitoring component 2 as an example, the first preset parameter range can be a range of values ​​such as 1-3V or 4-5V, or a specific value such as 1V or 3V. Correspondingly, when the preset parameter range is a specific value, the pre-established correspondence between the preset parameter range and the motor adjustment amount is the correspondence between that value and the motor adjustment amount; when the preset parameter range is a range of values, the pre-established correspondence between the preset parameter range and the motor adjustment amount is the correspondence between that range of values ​​and the motor adjustment amount.

[0084] Taking the voltage generated when fluid flows through monitoring component 2 as an example, the process of using controller 3 to control motor 41 to drive propulsion block 43 to move axially based on relevant parameters, in order to adjust the minimum diameter of the straightening block component 5 when it contracts radially, is illustrated as follows: The first preset parameter range includes the following: voltage ranges: 3-3.5V, 3.6-4V, 4.1-4.5V. Correspondingly, the relationship between the established first preset parameter range and the motor adjustment amount includes: when the voltage is 3-3.5V, control motor 41 to rotate forward three times; when the voltage is 3.6-4V, control motor 41 to rotate forward four times; when the voltage is 4.1-4.5V, control motor 41 to rotate forward five times. The second preset parameter range includes the following: voltage ranges ... The voltage is 1-1.5V, 1.6-2V, and 2.6-2.9V. Correspondingly, the relationship between the established second preset parameter range and the motor adjustment amount includes: when the voltage is 1-1.5V, the motor 41 is controlled to reverse three revolutions; when the voltage is 1.6-2V, the motor 41 is controlled to reverse four revolutions; when the voltage is 2.6-2.9V, the motor 41 is controlled to reverse five revolutions. In actual application, the drilling fluid discharge rate injected into the drill string connected to the stabilizer is changed as needed so that the drilling fluid generates a corresponding voltage value when flowing through the magnetic detection plate, thereby enabling the voltage monitoring plate to monitor the voltage value in real time. If the controller 3 receives a voltage of 3.2V from the voltage monitoring plate, the motor 41 is controlled to rotate forward three revolutions; if the controller 3 receives a voltage of 2.8V from the voltage monitoring plate, the motor 41 is controlled to reverse five revolutions.

[0085] In one embodiment, anti-slip teeth 54 are provided on the mating surface of the push block 43 and the straightening block assembly 5; a plurality of springs 7 are provided between the straightening block assembly 5 and the outer wall of the body 1.

[0086] When the straightening block assembly 5 contracts radially under the action of external force, it compresses the spring 7. When the external force disappears, it expands radially under the action of the restoring force of the spring 7. The propelling block and the mating surface of the straightening block assembly with anti-slip teeth separate. At this time, the propelling block can move up and down under the driving action of the motor.

[0087] To prevent the centralizing block assembly 5 from squeezing the two sides of the propeller block 43 and pushing it towards both ends of the body 1 when the wellbore thrust is large during the radial limiting process of the propeller block 43 on the centralizing block assembly 5, thus causing adjustment errors, anti-slip teeth 54 can be provided on the mating surface of the two to ensure adjustment accuracy through the engagement of the anti-slip teeth 54; at the same time, to ensure that the propeller block 43 can still move axially relative to the centralizing block assembly 5 even with the anti-slip teeth 54 provided, multiple springs can also be provided between the centralizing block assembly 5 and the outer wall of the body 1. When the centralizing block assembly 5 contracts radially under external force, the spring 7 is compressed. During the drilling process as the centralizer rotates with the drill string, when the centralizing block is not in contact with the well wall, i.e., when the external force disappears, the centralizing block assembly 5 can expand radially to the maximum displacement under the restoring force of the spring 7. When the centralizing block assembly 5 expands radially to the maximum position, the push block separates from the conical surface of the centralizing block assembly with anti-slip teeth. At this time, the motor can drive the push block 43 to move axially, thereby enabling the adjustment of the minimum diameter that the centralizer can reach.

[0088] In one embodiment, refer to Figure 7 As shown, the straightening block assembly 5 includes: a straightening block 51 and a fixing key 52;

[0089] The straightening block 51 has a PDC composite sheet 53 embedded on its outer side and a first conical surface and a second conical surface on its inner side. The radial dimension at the connection between the first and second conical surfaces is larger than the radial dimensions at both ends. Correspondingly, the propulsion blocks 43 of the two sets of propulsion assemblies 4 are respectively provided with a third conical surface and a fourth conical surface. The first conical surface is used to cooperate with the third conical surface, and the second conical surface is used to cooperate with the fourth conical surface, so as to adjust the minimum diameter that the straightener can achieve by the cooperation of each conical surface. The PDC composite sheet 53 embedded on the outer side of the straightening block 51 can improve the wear resistance of the straightener.

[0090] The first conical surface of the straightening block 51 is provided with a first anti-slip tooth 54; correspondingly, the third conical surface is provided with a matching third anti-slip tooth 54; the second conical surface is provided with a second anti-slip tooth 54, and correspondingly, the fourth conical surface is provided with a matching fourth anti-slip tooth 54; specifically, refer to... Figure 9 As shown, the propulsion block 43 is wedge-shaped with anti-slip teeth 54.

[0091] Furthermore, refer to Figure 7 and Figure 8 As shown, a fixing key 52 is provided at the connection between the first and second conical surfaces of the straightening block;

[0092] Accordingly, refer to Figure 5 and Figure 6As shown, a fixing groove 14 is provided on the outer wall of the main body 1, and a fixing key 52 is installed in the fixing groove 14. The movement of the fixing key 52 is radially limited by the straightening block fixing pressure block 9 installed on the main body 1. Optionally, the structure of the straightening block fixing pressure block 9 can refer to Figure 13 As shown, it has a cuboid structure with two first pin holes 91 on both sides, which cooperate with the fixing key 52 of the straightening block 51 and are fixed to the outer wall of the body 1 by the pins, thereby controlling the radial movement of the straightening block 51 and preventing the straightening block 51 from falling off.

[0093] The spring 7 is specifically positioned between the fixing key 52 and the fixing groove 14. Specifically, the bottom of the fixing key 52 has a spring mounting groove 521 for mounting the spring 7. Under the pushing force of the spring 7, the straightening block 51 can expand to its maximum displacement, leaving sufficient clearance for the forward and backward movement of the pushing block 43, preventing the pushing block 43 from being unable to move due to the meshing of the anti-slip teeth 54. The structure of the spring 7 can be as follows: Figure 14 As shown.

[0094] In one embodiment, the intelligent continuously variable diameter stabilizer of the present invention may further include: a power supply 6;

[0095] Power supply 6 is located on the outer wall of the main body and is used to power motor 41 and controller 3; specifically, power supply 6 can be a battery, and its structure can be found in [reference needed]. Figure 10 As shown.

[0096] In one embodiment, the motor 41 used in this embodiment of the invention is a stepper motor, which rotates a specified number of revolutions according to the control command of the controller 3;

[0097] Correspondingly, the push block 43 is provided with a threaded hole on the side near the motor 41 to cooperate with the screw 42 of the stepper motor, and the push block 43 is driven to move axially by the rotation of the screw 42.

[0098] Furthermore, the intelligent continuously variable diameter stabilizer provided in this embodiment of the invention also has a power supply mounting slot and a propulsion component mounting slot on the outer wall of the main body 1.

[0099] Reference Figure 1 As shown, the propulsion component 4 is installed in the corresponding propulsion component mounting slot and is radially positioned by the propulsion component fixing block 8; the power supply 6 is installed in the corresponding power supply mounting slot and is radially positioned by the power supply fixing block 10.

[0100] When multiple straightening modules are set, the number of straightening block components 5, propulsion components 4, power supply 6, power supply mounting slots and propulsion component mounting slots are set accordingly, and the controller 3 is set in one of the power supply mounting slots.

[0101] Specifically, refer to Figure 5As shown, the power supply mounting slot, the centering block mounting slot, and the propulsion component mounting slot are interconnected to form the actuator mounting slot 11. Within the actuator mounting slot 11, the power supply 6, propulsion component 4, centering block 51, and propulsion component 4 are installed sequentially from top to bottom, and each component is radially positioned by a corresponding fixing block. Optionally, the structure of the power supply 6 fixing block is as follows: Figure 12 As shown, it has a cuboid structure with multiple second pin holes 102 machined on both sides, for example, two on each side. It also has a power supply fixing groove 101 machined inside, which cooperates with the power supply 6 and is installed in the power supply fixing pressure block groove 12 on the body 1 by pins to control the radial movement of the power supply 6 and prevent the power supply 6 from falling off. Correspondingly, the structure of the propulsion component fixing pressure block 8 is similar to that of the power supply fixing pressure block 10. It can also be a cuboid structure with multiple pin holes machined on both sides, for example, two on each side. It also has a motor fixing groove machined inside, which cooperates with the motor 41 and is installed in the propulsion component fixing pressure block groove 13 on the body 1 by pins to control the radial movement of the propulsion component 4 and prevent it from falling off.

[0102] Furthermore, in this embodiment, the body 1 of the intelligent continuously variable diameter stabilizer is cylindrical, with connecting threads at its upper and lower ends for connecting to the upper and lower drilling tools, respectively. In this embodiment, the stabilizer can preferably be placed near the drill bit during application.

[0103] In one embodiment, the core of the controller provided in this embodiment may be a 51 microcontroller. In another embodiment, the detector used by the centralizer in this embodiment includes a structure comprising a detection magnetic sheet and a voltage monitoring sheet. When the motor used is a stepper motor, the circuit diagram of the intelligent continuously variable diameter centralizer is as follows: Figure 15As shown, the system includes: a voltage monitoring chip module 100, a controller data conversion module (ADC0832) 200, a controller microcontroller (80C51) 300, a Darlington array chip module (ULN2003A) 400, and a motor execution module 500. Specifically, the voltage monitoring chip module 100 monitors the voltage and transmits the analog voltage signal to the data conversion module. The data conversion module converts the received analog voltage signal into a digital signal that the microcontroller can process and transmits the digital signal to the microcontroller 300. The microcontroller 300 processes the received digital signal, generates a corresponding control signal, and transmits the control signal to the Darlington array chip module 400. The motor execution module receives the control signal transmitted by the Darlington array chip module 400 and outputs a corresponding voltage through the corresponding interface of the motor execution module to control the motor execution module 500 to perform corresponding operations. The number of voltage monitoring chip modules, data conversion modules, and motor execution modules can be set to one or more, and the number of voltage monitoring chip modules and data conversion modules are set accordingly. That is, each data conversion module is used to process the voltage data transmitted by the voltage monitoring chip module that is set with it.

[0104] Furthermore, the voltage monitoring chip module 100, data conversion module 200, microcontroller 300, Darlington array chip module 400, and motor actuation module 500 are connected via corresponding connection interfaces for data transmission and reception; for example: refer to Figure 15 As shown, the A1.1 and A1.2 interfaces of the detector module 100 are connected to the corresponding A1.1 and A1.2 interfaces of the data conversion module 200, respectively. The P2^0, P2^1, and P2^2 interfaces of the data conversion module 201 are connected to the corresponding P2^0, P2^1, and P2^2 interfaces of the microcontroller 300, respectively. The P1^0, P1^1, P1^2, and P1^3 interfaces of the microcontroller are connected to the corresponding P1^0, P1^1, P1^2, and P1^3 interfaces of the Darlington array chip module 400. The U1, U2, U3, and U4 interfaces of the Darlington array chip module 400 are connected to the corresponding U1, U2, U3, and U4 interfaces of the motor actuation module 500.

[0105] In one embodiment, the installation steps of each component of the intelligent continuously variable diameter centralizer provided by the present invention are illustrated as follows: 1. Install the voltage monitoring plate and the detection magnetic plate into the voltage monitoring plate mounting slot and the detection magnetic plate mounting slot respectively using screws; 2. Write the relevant program into the controller; 3. Install the power supply in the designated position in the power supply mounting slot, and install the controller and one of the power supplies together in the corresponding power supply mounting slot of the device, and fix them to the main body with the power supply fixing block and pins; 4. Install the propulsion component in the designated position of the propulsion component mounting slot and fix it with the motor fixing block and pins; 5. Install the centralizing block in the designated position of the centralizing block mounting slot and fix it with the centralizing block fixing block and pins.

[0106] Based on the same inventive concept, this embodiment of the invention also provides an intelligent continuously variable diameter stabilizer tool string, including: a drill bit and the above-mentioned intelligent continuously variable diameter stabilizer;

[0107] The two ends of the intelligent continuously variable diameter stabilizer are connected to the drilling tools.

[0108] Regarding the toolchain in the above embodiments, the specific structure and usage method of its intelligent continuously variable diameter centralizer have been described in detail in the embodiments related to the centralizer, and will not be elaborated here.

[0109] Based on the same inventive concept, embodiments of the present invention also provide a method for using the above-mentioned intelligent continuously variable diameter stabilizer, comprising:

[0110] Connect the intelligent continuously variable diameter stabilizer to the drill string;

[0111] The fluid flow rate injected into the drill string is changed, and relevant parameters of the fluid flowing through the body are obtained in real time through the monitoring component;

[0112] The controller receives relevant parameters in real time and controls the motor to move the propulsion block axially based on these parameters, thereby adjusting the minimum diameter that the centralizer can achieve when the centralizer block assembly contracts radially.

[0113] Furthermore, in the method of using the intelligent continuously variable diameter centralizer according to the embodiments of the present invention, the motor is controlled to move the propulsion block axially based on relevant parameters to adjust the minimum diameter that the centralizer can achieve when the centralizer block assembly contracts radially; including:

[0114] If the relevant parameters are within the first preset parameter range set, based on the relevant parameters and the pre-established correspondence between the relevant parameters and the motor adjustment amount, the motor is controlled to drive the propulsion block backward, so as to reduce the minimum diameter that the straightener can reach when the straightening block assembly contracts radially under the action of external force;

[0115] If the relevant parameters are within the second preset parameter range set, based on the relevant parameters and the pre-established correspondence between the relevant parameters and the motor adjustment amount, the motor is controlled to drive the propulsion block forward, so that the straightening block assembly expands radially under the action of the propulsion block, thereby increasing the minimum diameter that the straightener can reach when the straightening block assembly contracts radially.

[0116] The specific process of using the intelligent continuously variable diameter stabilizer in the above embodiments has been described in detail in the embodiments related to the stabilizer, and will not be elaborated here.

[0117] The intelligent continuously variable diameter stabilizer, tool string, and method of use described in this invention embodiment include components connected together by threads or pins. When applied, the stabilizer can intelligently adjust the outer diameter of the near-bit series stabilizers by changing the displacement of the fluid injected into the body, avoiding tripping due to the stabilizer's outer diameter not meeting requirements. It can also greatly increase the length of composite drilling sections, improve trajectory control efficiency, and increase production timeliness.

[0118] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process may be rearranged without departing from the scope of this disclosure. The appended method claims provide elements of various steps in an exemplary order and are not intended to limit the scope to the specific order or hierarchy described.

[0119] In the detailed description above, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0120] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

Claims

1. An intelligent stepless variable-diameter centralizer, characterized in that, The application relates to a centralizer for a pipe string, which comprises a body, a monitoring assembly arranged on the inner wall of the body, a controller arranged on the outer wall of the body and a plurality of centralizer modules. The monitoring assembly is used for monitoring the related parameters of the fluid flowing through the body in real time. The centralizer module comprises a centralizer block assembly and two groups of propelling assemblies arranged at the two ends of the centralizer block assembly. The centralizer block assembly is radially slidably connected with the outer wall of the body. The propelling assembly comprises an electric motor and a propelling block connected with each other; the matching surface of the propelling block and the centralizer block assembly is a conical surface, so that the centralizer block assembly is radially limited when the centralizer block assembly is radially contracted under the action of external force. The controller is used for receiving the related parameters in real time, and controlling the electric motor to drive the propelling block to move along the axial direction based on the related parameters, so as to adjust the minimum diameter that can be reached by the centralizer under the condition that the centralizer block assembly is radially contracted. The controller is used for controlling the electric motor to drive the propelling block to move along the axial direction based on the related parameters, so as to adjust the minimum diameter that can be reached by the centralizer under the condition that the centralizer block assembly is radially contracted; the controller is used for 2. The intelligent constant-diameter centralizer of claim 1, wherein, When the related parameters are within a corresponding first preset parameter range set, the controller controls the electric motor to drive the propelling block to retreat based on the related parameters and the corresponding relationship between the first preset parameter range and the adjustment amount of the electric motor, so as to reduce the minimum diameter that can be reached by the centralizer under the condition that the centralizer block assembly is radially contracted; the first preset parameter set comprises a plurality of first preset parameter ranges. When the related parameters are within a corresponding second preset parameter range set, the controller controls the electric motor to drive the propelling block to move forward based on the related parameters and the corresponding relationship between the second preset parameter range and the adjustment amount of the electric motor, so as to increase the minimum diameter that can be reached by the centralizer under the condition that the centralizer block assembly is radially contracted; the second preset parameter set comprises a plurality of second preset parameter ranges. The related parameters can be the displacement of the fluid or the voltage generated when the fluid flows through the monitoring assembly.

3. The intelligent constant-diameter centralizer of claim 1, wherein, Correspondingly, when the related parameters are the displacement of the fluid, the monitoring assembly is a flow meter. When the related parameters are the voltage generated when the fluid flows through the monitoring assembly, the monitoring assembly comprises two detection magnetic force sheets and two voltage monitoring sheets; the detection magnetic force sheets and the voltage monitoring sheets are alternately arranged on the inner wall of the body, and the connecting lines between the detection magnetic force sheets and the connecting lines between the voltage monitoring sheets are perpendicular to each other. The detection magnetic force sheets are used for generating a magnetic field, and the voltage monitoring sheets are used for monitoring the voltage generated between the two voltage monitoring sheets when the fluid flows through the magnetic field, and transmitting the voltage to the controller. Anti-skid teeth are arranged on the matching surface of the propelling block and the centralizer block assembly; a plurality of springs are arranged between the centralizer block assembly and the outer wall of the body.

4. The intelligent constant-diameter centralizer of claim 1, wherein, ​ The righting block assembly is contracted along the radial direction under the action of external force, the spring is compressed, and the righting block assembly is expanded along the radial direction under the action of the restoring force of the spring when the external force disappears.

5. The intelligent constant-diameter centralizer of claim 4, wherein, The righting block assembly comprises a righting block and a fixing key. The outer side of the righting block is inlaid with a PDC composite sheet, the inner side is provided with a first taper surface and a second taper surface, and the radial dimension of the connection between the first taper surface and the second taper surface is greater than the radial dimension of the two ends; correspondingly, the pushing blocks of the two groups of pushing assemblies are respectively provided with a third taper surface and a fourth taper surface; the first taper surface is used for cooperating with the third taper surface, and the second taper surface is used for cooperating with the fourth taper surface. The fixing key is arranged at the connection between the first taper surface and the second taper surface; correspondingly, a fixing groove is arranged on the outer wall of the body, the fixing key is installed in the fixing groove, and the movement of the fixing key is radially limited by the righting block fixing pressing block installed on the body; and the spring is arranged between the fixing key and the fixing groove.

6. The intelligent constant-diameter centralizer of claim 1, wherein, A plurality of righting modules are uniformly distributed along the circumference of the outer wall of the body.

7. The intelligent constant-diameter centralizer of claim 1, wherein, Further comprising: a power supply; The power supply is arranged on the outer wall of the body and is used for supplying power to the motor and the controller.

8. The intelligent constant-diameter centralizer of any one of claims 1-7, wherein, The motor is a stepping motor; a threaded hole is arranged on the side of the pushing block close to the motor, so as to cooperate with the screw rod of the stepping motor, and the pushing block is driven to move along the axial direction through the rotation of the screw rod.

9. The intelligent constant-diameter centralizer of claim 7, wherein, The outer wall of the body is further provided with a power supply installation groove and a pushing assembly installation groove; The pushing assembly is arranged in the corresponding pushing assembly installation groove and is radially positioned by the pushing assembly fixing pressing block; The power supply is arranged in the corresponding power supply installation groove and is radially positioned by the power supply fixing pressing block; When the righting module is arranged in a plurality of cases, the number of righting block assemblies, pushing assemblies, power supplies, power supply installation grooves and pushing assembly installation grooves is correspondingly arranged, and the controller is arranged in one of the power supply installation grooves.

10. An intelligent, stepless variable diameter centralizer tool string, characterized by, Including: a drilling tool and the intelligent stepless variable-diameter centralizer according to any one of claims 1-9; The two ends of the intelligent stepless variable-diameter centralizer are respectively connected with the drilling tool.

11. A method of using the intelligent stepless variable diameter centralizer according to any one of claims 1-8, characterized in that, Including: connecting the intelligent stepless variable-diameter centralizer with the drilling tool; changing the fluid displacement injected into the drilling tool, and acquiring the related parameters of the fluid flowing in the body in real time through the monitoring assembly; controlling the motor to drive the pushing block to move along the axial direction in real time based on the related parameters, so as to adjust the minimum diameter that the centralizer can reach under the condition that the righting block assembly is contracted along the radial direction.

12. The method of using the intelligent stepless variable diameter centralizer of claim 11, wherein, controlling the motor to drive the pushing block to move along the axial direction based on the related parameters, so as to adjust the minimum diameter of the centralizer under the condition that the righting block assembly is contracted along the radial direction; including: if the related parameters are within the first preset parameter range, controlling the motor to drive the pushing block to retreat based on the related parameters and the corresponding relationship between the related parameters and the motor adjustment amount, so as to reduce the minimum diameter that the centralizer can reach when the righting block assembly is contracted along the radial direction under the action of external force; If the relevant parameter is within the second preset parameter range set, based on the relevant parameter and a pre-established corresponding relationship between the relevant parameter and the motor adjustment amount, the motor is controlled to drive the propelling block to move forward to increase the minimum diameter that the centralizer can reach under the condition that the centralizer block assembly is radially contracted.

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