Intelligent auxiliary salt layer clamping short section, system and salt layer clamping method

Abstract

The invention discloses an intelligent auxiliary salt bed clamping short section and system and a salt bed clamping method. The short section is used for being connected with a drilling tool and comprises a motor fixing seat and a body which are connected, a valve bottom plate, a valve plate and a valve cover plate which are sequentially arranged in the body from top to bottom, a detector arranged on the outer wall of the body, and a controller and at least one motor which are arranged in the motor fixing seat, wherein the valve bottom plate and the valve cover plate are fixedly connected with the body, and the valve plate is connected with the motor; a first through hole, a second through hole and a third through hole are respectively formed in the valve bottom plate, the valve plate and the valve cover plate; the detector is used for being connected with a power source so as to obtain the voltage of drilling fluid flowing through the detector in the shaft in real time. The controller is used for receiving the voltage transmitted by the detector in real time and controlling the motor to drive the valve plate to rotate based on the difference value between the voltages so that the first through hole, the second through hole and the third through hole can be periodically communicated and closed. And a salt layer can be accurately clamped.

Description

Technical Field

[0001] This invention relates to the fields of geothermal and oil and gas drilling technology, and in particular to an intelligent auxiliary salt layer trapping section, system, and method. Background Technology

[0002] As oilfield exploration and development deepens, deep wells frequently encounter high-pressure salt layers. Due to the strong creep characteristics of salt layers, drilling tools operating in complex salt layers are highly susceptible to necking and stuck drill bits caused by low mud density and well leakage. Therefore, to suppress salt layer necking, higher drilling fluid density is often required for targeted salt layer drilling. Accurately determining whether a salt layer has been encountered is crucial to avoiding downhole complications such as leakage and spillage during oilfield exploration and development. Current technologies generally determine whether a salt layer has been encountered by analyzing the composition of rock cuttings returned from the wellbore; or by observing changes in drilling time during the drilling process. Summary of the Invention

[0003] The inventors of this application have discovered that existing methods for analyzing the composition of rock cuttings returned from the wellbore to determine whether a salt layer has been encountered can lead to inaccurate results because the rock cuttings may be diluted by the drilling fluid, resulting in inaccurate analysis. Furthermore, this method requires waiting for the rock cuttings to be returned to the surface with the drilling fluid before analysis can be performed, causing a significant time delay. Similarly, methods that rely on changes in drilling time during the drilling process to determine whether a salt layer has been encountered can also result in slower drilling times if a section of the target area is not a salt layer but has relatively loose geology. Therefore, methods that rely on changes in drilling time during the drilling process to determine whether a salt layer has been encountered also suffer from low accuracy.

[0004] In view of the above problems, the present invention is proposed to provide an intelligent auxiliary salt layer clipping section, system, and method for overcoming or at least partially solving the above problems.

[0005] The intelligent auxiliary salt layer clip provided in this embodiment of the invention is used to connect with the drilling tool, and includes: a connected motor mounting base and body, a valve base plate, a valve plate, a valve cover plate disposed in the body, a detector disposed on the outer wall of the body, a controller disposed in the motor mounting base, and at least one motor.

[0006] The valve cover plate, valve plate, and valve base plate are arranged sequentially from top to bottom within the main body, and the valve base plate and the valve cover plate are fixedly connected to the main body, while the valve plate is connected to the motor.

[0007] The valve base plate, the valve plate, and the valve cover plate are respectively provided with a first through hole, a second through hole, and a third through hole;

[0008] The detector is used to connect to a power source to acquire, in real time, the voltage of the drilling fluid flowing through the detector in the wellbore;

[0009] The controller is used to receive the voltage transmitted by the detector in real time, and control the motor to drive the valve plate to rotate based on the voltage difference, so that the first through hole, the second through hole and the third through hole are periodically connected and closed.

[0010] In an optional embodiment, the detector includes: a housing, a flow guide plate, and two voltage detection plates;

[0011] The housing is a hollow structure to form a flow channel, and the detector is connected to the outer wall of the main body through the first side wall of the housing.

[0012] The guide tongue is set at a preset angle to the second side wall of the shell so that the drilling fluid in the wellbore flows into the guide groove after being guided by the guide tongue; the first side wall and the second side wall are two side walls that are opposite to each other.

[0013] The voltage detectors are spaced apart on the first sidewall, and the two voltage detectors are respectively connected to the two ends of the power supply to detect the voltage between the two voltage detectors in real time when the drilling fluid in the wellbore flows through the voltage detectors.

[0014] In an optional embodiment, a flow guiding installation groove is provided on the outer wall of the body; the flow guiding installation groove includes: a first conical section, a planar section and a second conical section connected sequentially from top to bottom;

[0015] The two ends of the planar segment are respectively connected to the smaller diameter ends of the first conical segment and the second conical segment, and the first sidewall is connected to the planar segment.

[0016] In an optional embodiment, the controller is configured to control the motor to rotate the valve plate based on the voltage difference; including:

[0017] The controller is used to control the motor to rotate the valve plate when the difference between the voltage at the previous moment and the voltage at the current moment is greater than a preset difference threshold.

[0018] In one optional embodiment, the detectors are configured as a plurality of detectors, which are distributed circumferentially along the outer wall of the body;

[0019] Accordingly, when the controller controls the motor to drive the valve plate to rotate based on the voltage difference, the voltage used is the average value of the voltages transmitted by multiple detectors.

[0020] In an optional embodiment, a plurality of fixing grooves are provided on the lower end surface of the valve base plate; correspondingly, a plurality of locking keys are provided on the inner wall of the body, and the valve base plate and the body are connected by the locking keys and the fixing grooves.

[0021] In an optional embodiment, a first gear is provided circumferentially on the valve plate; correspondingly, a second gear is provided at the top of the rotating shaft of the motor, so as to drive the valve plate to rotate through the meshing of the second gear and the first gear.

[0022] In an optional embodiment, a first ball groove and a second ball groove are respectively provided on the upper and lower end faces of the valve plate;

[0023] Accordingly, a third ball groove is provided on the lower end face of the valve cover plate, and a fourth ball groove is provided on the upper end face of the valve base plate, so as to install the ball through the cooperation of the first ball groove and the third ball groove, and the cooperation of the second ball groove and the fourth ball groove.

[0024] In an optional embodiment, the smart auxiliary card salt layer section provided in this embodiment of the invention further includes: a power supply;

[0025] The power supply is installed inside the motor mounting bracket and is used to supply power to the motor, detector, and controller.

[0026] In an optional embodiment, the motor mounting base is provided with a motor mounting slot and a power supply mounting slot, and the main body is provided with a motor gear rotation slot;

[0027] When multiple motors are configured, the number of motors, power supplies, motor mounting slots, and motor gear rotation slots are set accordingly, and the controller is set in one of the power supply mounting slots.

[0028] Based on the same inventive concept, this invention also provides an intelligent auxiliary salt layer trapping system, including: a mud pump, a vertical pressure gauge, a drill bit, and the aforementioned auxiliary salt layer trapping section;

[0029] The mud pump is connected to the drill string and is used to inject drilling fluid into the drill string. The vertical pressure gauge is used to detect the pump pressure at the output end of the mud pump.

[0030] The auxiliary salt layer chute is located at the lower end of the drill string.

[0031] Based on the same inventive concept, embodiments of the present invention also provide a method for implementing a salt layer based on the above-described auxiliary salt layer system, comprising:

[0032] Drilling fluid is injected into the drill string through a mud pump, and the voltage of the drilling fluid flowing through the detector in the wellbore is acquired in real time using a detector that assists in locking the salt layer sub.

[0033] The controller receives the voltage in real time and controls the motor to drive the valve plate to rotate based on the voltage difference;

[0034] The rotation of the valve plate causes the first, second, and third through holes to periodically connect and close, thereby causing the drill string water channel to periodically open and close, resulting in fluctuations in the wellhead pump pressure.

[0035] Based on the pump pressure fluctuations, it was determined that the drilling had reached the salt layer.

[0036] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0037] The intelligent auxiliary card salt layer section provided in this embodiment of the invention is equipped with a detector. This detector can acquire the voltage of the drilling fluid flowing through it in real time. When encountering a salt layer, the salt entering the drilling fluid reduces its resistivity. Consequently, the voltage detected by the detector decreases as the fluid flows through it. Therefore, a change in the voltage transmitted from the detector to the controller indicates a change in the resistivity of the drilling fluid flowing through it. In this case, the section provided in this embodiment can use the controller to control a motor to rotate a valve plate based on the voltage difference, periodically connecting the first, second, and third through holes. The system closes, causing the drill string's water inlet to periodically close and open. Since the pump pressure of the injection pump on the surface fluctuates with the opening and closing of the water inlet, surface personnel can determine whether a salt layer has been encountered based on these fluctuations. This short section can assist in securing a salt layer. Compared to existing methods for securing salt layers, this system improves accuracy by using the voltage difference between the drilling fluid readings to determine if a salt layer has been encountered. Furthermore, this device simplifies the process by allowing for judgment based on fluctuations in the wellhead pump pressure. Additionally, the rapid response to pump pressure changes during the periodic opening and closing of the water inlet reduces the time required to secure a salt layer.

[0038] 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.

[0039] 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

[0040] 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:

[0041] Figure 1 This is a schematic diagram of the overall structure of the salt layer short section of the intelligent auxiliary card in an embodiment of the present invention;

[0042] Figure 2 This is a cross-sectional view of the short salt layer section of the intelligent auxiliary card in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the structure of the body in an embodiment of the present invention;

[0044] Figure 4 This is one of the structural schematic diagrams of the motor mounting bracket in an embodiment of the present invention;

[0045] Figure 5 This is another structural schematic diagram of the motor mounting bracket in an embodiment of the present invention;

[0046] Figure 6 This is a schematic diagram of the detector structure of the salt layer short section of the intelligent auxiliary card in an embodiment of the present invention;

[0047] Figure 7 This is a schematic diagram of the flow guide mounting groove in an embodiment of the present invention;

[0048] Figure 8 This is one of the structural schematic diagrams of the valve cover plate in an embodiment of the present invention;

[0049] Figure 9 This is another structural schematic diagram of the valve cover plate in an embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the valve plate structure in an embodiment of the present invention;

[0051] Figure 11 This is one of the structural schematic diagrams of the valve base plate in an embodiment of the present invention;

[0052] Figure 12 This is another structural schematic diagram of the valve base plate in an embodiment of the present invention;

[0053] Figure 13 This is a schematic diagram of the motor structure in an embodiment of the present invention;

[0054] Figure 14 This is a schematic diagram of the controller in the power supply connection state in an embodiment of the present invention;

[0055] Figure 15 This is a circuit diagram of each component of the salt layer section of the intelligent auxiliary card in an embodiment of the present invention.

[0056] Explanation of reference numerals in the attached figures:

[0057] 1. Body; 2. Motor mounting bracket; 3. Valve cover plate; 4. Valve plate; 5. Valve base plate; 6. Motor; 7. Detector; 8. Controller; 9. Ball bearing; 10. Power supply;

[0058] 11. Motor gear rotation groove; 12. Locking key; 13. Valve cover plate fixing threaded hole; 14. Motor mounting base fixing threaded hole; 15. Flow guide mounting groove; 21. Power supply mounting groove; 22. Motor mounting groove; 23. First pin hole; 24. Connecting thread; 31. First through hole; 32. Third ball groove; 33. Second pin hole; 41. First gear; 42. First ball groove; 43. Second through hole; 51. Third through hole; 52. Fixing groove; 53. Fourth ball groove; 61. Rotating shaft; 62. Motor body; 63. Third pin hole; 611. Second gear; 71. Voltage detection plate; 72. Flow guide tongue plate; 73. Housing; 731. First side wall; 732. Second side wall; 151. First conical section; 152. Flat section; 153. Second conical section. Detailed Implementation

[0059] 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.

[0060] 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.

[0061] 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.

[0062] The inventors of this application discovered that when encountering a salt layer, the salt enters the drilling fluid, which reduces the resistivity of the drilling fluid. Therefore, when the drilling fluid flows through a detector connected to a power source, the voltage obtained by the drilling fluid after the resistivity decreases will decrease. In other words, after the salt in the salt layer enters the drilling fluid, the voltage detected by the detector will decrease.

[0063] Based on the above principles, in order to solve the problems of delay and low accuracy in salt layer clamping in existing technologies, this invention provides an intelligent assisted salt layer clamping section, system, and method. It should be noted that in this embodiment, the upper end refers to one end of the motor mounting base 2, and the lower end refers to one end of the body 1.

[0064] The intelligent auxiliary salt layer sub provided in this embodiment of the invention is used to connect to the drill string, as shown in the reference. Figures 1 to 3 As shown, it includes: a motor mounting base 2 and a body 1 connected together, a valve base plate 5, a valve plate 4, a valve cover plate 3 disposed in the body 1, a detector 7 disposed on the outer wall of the body 1, a controller 8 disposed in the motor mounting base 2, and at least one motor 6.

[0065] Valve cover plate 3, valve plate 4 and valve bottom plate 5 are arranged in the body 1 from top to bottom, and valve bottom plate 5 and valve cover plate 3 are fixedly connected to the body 1, and valve plate 4 is connected to motor 6.

[0066] A first through hole 31, a second through hole 43, and a third through hole 51 are respectively provided on the valve base plate 5, the valve plate 4, and the valve cover plate 3;

[0067] The detector 7 is used to connect to a power source so as to obtain the voltage of the drilling fluid in the wellbore as it flows through the detector 7 in real time.

[0068] The controller 8 is used to receive the voltage transmitted by the detector 7 in real time, and control the motor 6 to drive the valve plate 4 to rotate based on the difference between the voltages, so that the first through hole 31, the second through hole 43 and the third through hole 51 are periodically connected and closed.

[0069] The auxiliary salt layer card section provided in this embodiment of the invention is equipped with a detector 7. The detector 7 can acquire the voltage of the drilling fluid flowing through it in real time. When encountering a salt layer, the salt entering the drilling fluid reduces its resistivity. Consequently, the voltage detected by the detector 7 decreases as the fluid flows through it. Therefore, a change in the voltage transmitted from the detector 7 to the controller 8 indicates a change in the resistivity of the drilling fluid flowing through it. In this case, the section provided in this embodiment can utilize the controller 8 to control the motor 6 to rotate the valve plate 4 based on the voltage difference, thereby opening the first through hole 31, the second through hole 43, and the third through hole 51. The system periodically connects and closes the water inlets of the drill string, causing them to periodically close and open. Since the pump pressure of the injection pump on the surface fluctuates with the opening and closing of the water inlets, surface personnel can determine whether a salt layer has been encountered based on these fluctuations. This short section can assist in securing a salt layer. Compared to existing methods for securing salt layers, this method improves accuracy by using the voltage difference between the drilling fluid readings to determine if a salt layer has been encountered. Furthermore, this device simplifies the process by allowing for judgment based on fluctuations in the wellhead pump pressure. Additionally, the rapid response to pump pressure changes during the periodic opening and closing of the water inlets reduces the time required to secure a salt layer.

[0070] Specifically, refer to Figures 2 to 7 As shown, the body 1 and motor mounting base 2 of the salt layer short section in this embodiment can be cylindrical structures. The lower part of the body 1 is threaded for connection with the lower drill bit, and the upper part of the motor mounting base 2 is threaded with a thread 24 for connection with the upper drill bit. Specifically, in application, this embodiment can preferably be located near the drill bit. The top of the body 1 is provided with a motor fixing threaded hole 14 and a valve cover plate fixing threaded hole 13. The motor fixing threaded hole 14 is used to match the first pin hole 23 provided on the motor mounting base 2, and the valve cover plate fixing threaded hole 13 is matched with the second pin hole 33 and the third ball groove provided on the valve cover plate 3, so that the connection between the motor mounting base 2 and the body 1, and the connection between the valve cover plate 3 and the body 1 can be achieved by the pin passing through the corresponding pin hole and threaded hole.

[0071] It should be noted that the embodiments of the present invention do not specifically limit the number and distribution of the first pin hole 23 and the second pin hole 33, and can be selected according to actual needs; such as Figure 8 and Figure 9 As shown, there are three second pin holes 33, which are evenly distributed along the outer circumference of the valve cover plate 3; correspondingly, referring to Figure 3 As shown, the number of valve cover plate fixing threaded holes 13 and the number of second pin holes 33 are the same, and their positions correspond; for example... Figure 4As shown, there are three first pin holes 23, which are evenly distributed circumferentially along the stepped surface of the motor mounting base 2. Correspondingly, referring to... Figure 3 As shown, the number of motor fixing threaded holes 14 and the number of first pin holes 23 are the same, and their positions correspond.

[0072] Among them, reference Figure 6 As shown, the detector 7 may include at least two voltage detection plates 71 spaced apart; wherein the two voltage detection plates 71 are connected to the two ends of a power supply to acquire the voltage between the two voltage detection plates 71 in real time as the drilling fluid flows through the voltage detection plates 71 in the wellbore. Correspondingly, the controller 8 is used to receive the voltage transmitted by the voltage detection plates 71 in real time.

[0073] Furthermore, in one embodiment, reference is made to... Figure 6 As shown, the detector 7 includes: a housing 73, a flow guide plate 72, and two voltage detection plates 71;

[0074] The housing has a hollow structure to form a flow channel, and the detector 7 is connected to the outer wall of the body 1 through the first side wall 731 of the housing; voltage detection plates 71 are spaced apart on the first side wall 731; specifically, the voltage detection plates 71 can be arranged perpendicular to the first side wall.

[0075] The guide tongue 73 is set at a preset angle to the second side wall 723 of the housing 73 so that the drilling fluid in the wellbore flows into the guide groove after being guided by the guide tongue 73; the first side wall 731 and the second side wall 732 are two side walls with opposite positions.

[0076] In one embodiment, refer to Figure 3 and Figure 7 As shown, a flow guide installation groove 15 is provided on the outer wall of the main body 1; the flow guide installation groove 15 includes: a first conical section 151, a flat section 152 and a second conical section 153 connected sequentially from top to bottom;

[0077] The two ends of the planar section 152 are respectively connected to the smaller diameter ends of the first conical section 151 and the second conical section 153. The first sidewall 731 is connected to the planar section 152. Specifically, the first sidewall 731 of the detector 7 can be fixed to the planar section 152 of the guide installation groove 15 by a pin. After the drilling fluid enters the wellbore and flows upward, the drilling fluid enters the guide groove of the detector 7 after being guided by the second conical section 153 and the guide tongue 72. Then, the drilling fluid flowing out of the guide groove merges with the drilling fluid in the wellbore under the guiding action of the first conical section 151.

[0078] In one embodiment, the controller 8 is used to control the motor 6 to rotate the valve plate 4 based on the voltage difference; including:

[0079] The controller 8 is used to control the motor 6 to rotate the valve plate 4 when the difference between the voltage at the previous moment and the voltage at the current moment is greater than a preset difference threshold. In this embodiment of the invention, the preset difference threshold is not specifically limited and can be selected according to actual needs. For example, the preset difference threshold can be 30% of the voltage at the previous moment. That is, when the voltage at the current moment is 30% or more lower than the voltage at the previous moment, the controller 8 will send a control signal, and the motor 6 will start working after receiving the control signal to rotate the valve plate 4.

[0080] In an optional embodiment, the detector 7 may be configured as a plurality of detectors, specifically, the plurality of detectors 7 are distributed circumferentially along the outer wall of the body 1.

[0081] Accordingly, when the controller 8 controls the motor 6 to drive the valve plate 4 to rotate based on the voltage difference, the voltage used is the average value of the voltages transmitted by multiple detectors 7; that is, after the controller 8 receives the voltages transmitted by each detector 7 in real time, it first calculates the average value of each voltage and uses the calculated average value as the real-time voltage. Then, it controls the motor 6 to drive the valve plate 4 to rotate based on the difference between the real-time voltage at the previous moment and the real-time voltage at the current moment.

[0082] In this embodiment, the auxiliary salt layer trapping sub is generally difficult to maintain in the center of the drilled wellbore during drilling. With only one detector 7, the voltage measured by the sub rotating with the drill bit may have some deviation. Therefore, this auxiliary salt layer trapping sub preferably uses multiple detectors 7. The controller uses the average voltage transmitted by multiple detectors to control the motor movement, thereby improving control accuracy. The number and distribution of detectors 7 are not specifically limited in this embodiment and can be selected according to actual needs. For example, three detectors 7 can be used, evenly distributed along the circumference of the outer wall of the body 1. Correspondingly, when the controller 8 controls the motor 6 to rotate the valve plate 4 based on the voltage difference, the voltage used is the average voltage transmitted by the three detectors 7.

[0083] In an optional embodiment, refer to Figure 11 and Figure 12 As shown, a plurality of fixing grooves 52 are provided on the lower end surface of the valve base plate 5; correspondingly, referring to Figure 3 As shown, multiple locking keys 12 are provided on the inner wall of the main body 1, and the valve base plate 5 is connected to the main body 1 through the engagement of the locking keys 12 and the fixing groove 52.

[0084] The present invention does not specifically limit the number and distribution of the fixing slots 52 and the locking keys 12 (e.g., they can be uniformly distributed or non-uniformly distributed), and can select them according to actual needs. For example, refer to... Figure 11As shown, six fixing grooves are evenly machined on the lower circumference of the valve base plate 5. Correspondingly, six locking keys 12 that are adapted to the fixing grooves are provided on the body 1 so that the connection between the valve base plate 5 and the body 1 can be realized through the mutual cooperation of the six fixing grooves and the six locking keys 12.

[0085] In one embodiment, refer to Figure 10 As shown, a first gear 41 is circumferentially arranged on the valve plate 4; correspondingly, referring to... Figure 13 As shown, the motor 6 includes a motor body 62 and a rotating shaft 61. A second gear 611 is provided at the top of the rotating shaft 61 of the motor 6, so as to drive the valve plate 4 to rotate through the meshing of the second gear 611 with the first gear 41, thereby providing power to the valve plate 4.

[0086] Reference Figures 8 to 12 As shown, the valve plate 4 has a first ball groove 42 and a second ball groove (not shown in the figure) respectively on its upper and lower end faces;

[0087] Correspondingly, a third ball groove 32 is provided on the lower end surface of the valve cover plate 3, and a fourth ball groove 53 is provided on the upper end surface of the valve base plate 5, so that the ball 9 can be installed through the cooperation of the first ball groove 42 and the third ball groove 32, and the cooperation of the second ball groove and the fourth ball groove 53. The structure of providing ball grooves and ball 9 can reduce the friction between the three during the rotation of the valve plate 4 relative to the valve base plate 5 and the valve cover plate 3.

[0088] Furthermore, refer to Figures 8 to 12 As shown, the valve base plate 5, valve plate 4, and valve cover plate 3 can specifically be disc-shaped structures. It should be noted that the embodiments of the present invention do not limit the number, shape (e.g., circular, square, etc.), or specific location of the first, second, and third through holes, as long as they can achieve the goal of not affecting the circulation of drilling fluid during normal drilling operations, and that the three through holes can periodically close and open during the rotation of the valve plate 4 driven by the motor 6. For example: Figures 8 to 12 In the valve cover plate 3, the number of the first through hole, the number of the second through hole on the valve plate 4, and the number of the third through hole on the valve base plate 5 are each set to two, and the shape of each through hole is circular.

[0089] Furthermore, the smart auxiliary card salt layer section provided in this embodiment of the invention, such as... Figure 14 As shown, it may also include: power supply 10;

[0090] Specifically, the power supply 10 is installed in the motor mounting base 2 and is used to supply power to the motor 6, the detector 7 and the controller 8. In one embodiment, the power supply connected to the detector 7 can be the power supply 10 installed in the motor mounting base 2. Optionally, when the power supply 10 supplies power to the motor 6, the detector 7 and the controller 8, it can supply power to them separately in parallel. The specific power supply can be a battery.

[0091] In an optional embodiment, the motor mounting base 2 is provided with a motor mounting slot 22 and a power supply mounting slot 21, and the main body 1 is provided with a motor gear rotation slot 11; specifically, refer to Figure 12 As shown, the motor body 1 is provided with a third pin hole 63 so as to fix the motor body 1 into the motor mounting slot 22 by means of a pin;

[0092] When multiple motors 6 are configured, the number of motors 6, power supplies 10, motor mounting slots 22, and motor gear rotation slots 11 are set accordingly. The controller 8 is installed in one of the power supply mounting slots 21. For details, please refer to [reference needed]. Figure 14 As shown, the power supply 10 and controller 8 can be arranged sequentially from the inside to the outside. When multiple motors 6 are used, this avoids the situation where a single motor 6 can cause the short section to malfunction due to damage, thus affecting the salt layer coating effect.

[0093] The core of the controller provided in this embodiment can be a 51 microcontroller. In one embodiment, the circuit diagram of the smart auxiliary card salt layer short section is as follows: Figure 15 As shown, the system includes: a voltage detection module 101, a data conversion module 201 of the controller, a microcontroller 300 of the controller, and a motor execution module 401. Specifically, the voltage detection module 101 acquires analog voltage signals and transmits them to the data conversion module 201. The data conversion module 201 converts the received analog voltage signals into digital signals that the microcontroller 300 can process, and transmits these digital signals to the microcontroller 300. The microcontroller 300 processes the received digital signals, generates corresponding control signals, and transmits these control signals to the motor execution module 401. The motor execution module 401 receives the control signals transmitted by the microcontroller and controls the motor to operate based on these control signals. The number of voltage detection modules 101, data conversion modules 201, and motor execution modules 401 can be set to one or more, and the number of voltage detection modules 101 and data conversion modules 201 are correspondingly set, meaning each data conversion module 201 processes the voltage data transmitted by its corresponding voltage detection module 101. Specifically, refer to... Figure 15 The diagram shows the circuit diagrams for three different configurations of the voltage detection module, data conversion module, and motor execution module. In the diagram, 101, 102, and 103 represent the voltage detection module, 201, 202, and 203 represent the data conversion module, and 401, 402, and 403 represent the motor execution module.

[0094] Furthermore, the voltage detection module, data conversion module, microcontroller, and motor execution module are connected through corresponding connection interfaces to transmit and receive data. For example, the A1.0 and A1.1 interfaces of the voltage detection module 101 are connected to the corresponding A1.0 and A1.1 interfaces of the data conversion module 201 to transmit analog voltage signals; the P1.1, P1.2, and P1.3 interfaces of the data conversion module 201 are connected to the corresponding P1.1, P1.2, and P1.3 interfaces of the microcontroller 300 to transmit digital signals; and the P2.0 interface of the microcontroller is connected to the corresponding P2.0 interface of the motor execution module 401 to transmit control signals.

[0095] In one embodiment, refer to Figure 1 and Figure 2 As shown, the installation steps of each component of the intelligent auxiliary card salt layer short section provided in this embodiment of the invention are illustrated below: 1. The valve base plate is embedded into the valve base plate key through the fixing groove to connect the valve base plate to the body; 2. The valve plate is placed on the valve base plate and connected to the valve base plate through ball bearings; 3. The valve cover plate is placed on the valve plate through ball bearings and connected to the body through pins to axially fix the valve base plate and the valve plate; 4. The relevant program code is written into the microcontroller; 5. The motor and controller are connected to the motor mounting base through pins and the power lines are connected; 6. The motor mounting base is connected to the body through pins; 7. The detector is installed in the flow guide mounting groove of the short section body.

[0096] Based on the same inventive concept, this invention also provides an intelligent auxiliary salt layer trapping system, including: a mud pump, a vertical pressure gauge, a drill bit, and the aforementioned auxiliary salt layer trapping section;

[0097] The mud pump is connected to the drill string and is used to inject drilling fluid into the drill string. A vertical pressure gauge is installed between the mud pump and the wellhead to detect the pump pressure at the output end of the mud pump.

[0098] The auxiliary salt layer chute is located at the lower end of the drill string.

[0099] Based on the same inventive concept, embodiments of the present invention also provide a smart auxiliary card salt layer method, implemented based on the above-described auxiliary card salt layer system, comprising:

[0100] Drilling fluid is injected into the drill string through a mud pump, and the voltage of the drilling fluid flowing through the detector in the wellbore is acquired in real time using a detector that assists in locking the salt layer.

[0101] The controller receives the voltage transmitted by the detector in real time and controls the motor to drive the valve plate to rotate based on the voltage difference.

[0102] The rotation of the valve plate causes the first, second, and third through holes to periodically connect and close, thereby causing the drill string water channel to periodically open and close, resulting in fluctuations in the wellhead pump pressure.

[0103] Based on the pump pressure fluctuations, it was determined that the drilling had reached the salt layer.

[0104] The above-described intelligent auxiliary salt layer trapping section, system, and method of this invention, comprising a body, a valve base plate, a valve plate, a valve cover plate, a motor, a controller, a motor mounting base, and a detector, wherein the components of the section are connected together by pins or threads to form a structure that, when encountering a salt layer, causes the resistivity of the drilling fluid to decrease due to the salt entering the fluid, resulting in a decrease in the detection voltage, and the controller controls the motor to rotate based on the voltage change, periodically closing and opening the drill string water channel, causing pump pressure fluctuations, and alerting the surface engineer that the drill has reached the top and bottom of the salt layer, thus assisting in accurately trapping the salt layer.

[0105] 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.

[0106] 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.

[0107] 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 auxiliary card salt layer short section, characterized in that, A device for connecting with a drilling tool, comprising: a motor fixing seat and a body connected with each other, a valve bottom plate arranged in the body, a valve plate, a valve cover plate, a detector arranged on the outer wall of the body, and a controller and at least one motor arranged in the motor fixing seat; The valve cover plate, the valve plate and the valve bottom plate are sequentially arranged in the body from top to bottom, and the valve bottom plate and the valve cover plate are fixedly connected with the body, and the valve plate is connected with the motor; First, second and third through holes are respectively arranged on the valve bottom plate, the valve plate and the valve cover plate; The detector is connected with a power supply, so as to obtain the voltage of the drilling fluid flowing through the detector in real time; The controller is used for receiving the voltage transmitted by the detector in real time, and controlling the motor to drive the valve plate to rotate based on the difference between the voltages, so as to periodically connect and close the first, second and third through holes.

2. The intelligent auxiliary card salt section of claim 1, wherein, The detector comprises a shell, a flow guide tongue plate and two voltage detection pieces; The shell is a hollow structure to form a flow guide groove, and the detector is connected with the outer wall of the body through a first side wall of the shell; The flow guide tongue plate is arranged at a preset angle with a second side wall of the shell, so that the drilling fluid in the wellbore flows into the flow guide groove after being guided by the flow guide tongue plate; the first side wall and the second side wall are two opposite side walls; The voltage detection pieces are arranged on the first side wall in a spaced manner, and the two voltage detection pieces are respectively connected with two ends of the power supply, so as to detect the voltage between the two voltage detection pieces when the drilling fluid in the wellbore flows through the voltage detection pieces in real time.

3. The intelligent auxiliary card salt section of claim 2, wherein, The outer wall of the body is provided with a flow guide installation groove; the flow guide installation groove comprises a first conical section, a flat section and a second conical section connected in sequence from top to bottom; The two ends of the flat section are respectively connected with the smaller diameter ends of the first conical section and the second conical section, and the first side wall is connected with the flat section.

4. The intelligent auxiliary card salt section of claim 1, wherein, The controller is used for controlling the motor to drive the valve plate to rotate based on the difference between the voltages; comprising: The controller is used for controlling the motor to work to drive the valve plate to rotate when the difference between the voltage at the last moment and the voltage at the current moment is greater than a preset difference threshold.

5. The intelligent auxiliary card salt section of claim 1, wherein, The detector is provided as a plurality of detectors, and the plurality of detectors are distributed circumferentially along the outer wall of the body; Correspondingly, when the controller controls the motor to drive the valve plate to rotate based on the difference between the voltages, the voltage used is the average value of the voltages transmitted by the plurality of detectors.

6. The intelligent auxiliary card salt section of claim 1, wherein, A plurality of fixing grooves are arranged on the lower end surface of the valve bottom plate; correspondingly, a plurality of clamping keys are arranged on the inner wall of the body, and the valve bottom plate and the body are connected through the cooperation of the clamping keys and the fixing grooves.

7. The intelligent auxiliary card salt section of claim 1, wherein the salt section is formed from a plurality of layers of salt. A first gear is arranged circumferentially on the valve plate; correspondingly, a second gear is arranged at the top end of the rotating shaft of the motor, so as to drive the valve plate to rotate through the meshing of the second gear and the first gear.

8. The intelligent auxiliary card salt section of claim 1, wherein, First and second ball grooves are respectively arranged on the upper and lower end surfaces of the valve plate; Correspondingly, the lower end surface of the valve cover plate is provided with a third ball groove, and the upper end surface of the valve bottom plate is provided with a fourth ball groove, so as to install the ball through the cooperation of the first ball groove and the third ball groove and the cooperation of the second ball groove and the fourth ball groove.

9. The intelligent auxiliary card salt section of any one of claims 1-8, wherein, Also comprising: a power supply; The power supply is installed in the motor fixing seat for powering the motor, the detector and the controller.

10. The intelligent auxiliary card salt section of claim 9, wherein, The motor fixing seat is provided with a motor installation groove and a power supply installation groove, and the body is provided with a motor gear rotation groove; When the motor is provided in multiple, the number of the motor, the power supply, the motor installation groove and the motor gear rotation groove are correspondingly provided, and the controller is arranged in one of the power supply installation grooves.

11. An intelligent auxiliary card salt layer system, characterized by, Including: a mud pump, a stand pressure gauge, drilling tools and the auxiliary salt layer blocking section as claimed in any one of claims 1-10; The mud pump is connected with the drilling tools for injecting drilling fluid into the drilling tools, and the stand pressure gauge is used for detecting the pump pressure of the output end of the mud pump; The auxiliary salt layer blocking section is arranged at the lower end of the drilling tools.

12. A carded salt layer method characterized by, Based on the auxiliary salt layer blocking system as claimed in claim 11, comprising: injecting drilling fluid into the drilling tools through the mud pump, and using the detector of the auxiliary salt layer blocking section to obtain the voltage in the state that the drilling fluid in the wellbore flows through the detector in real time; The controller receives the voltage in real time, and controls the motor to drive the valve plate to rotate based on the difference between the voltages; Through the rotation of the valve plate, the first through hole, the second through hole and the third through hole are periodically connected and closed, so as to periodically open and close the water eye channel of the drilling tools, and make the wellhead pump pressure fluctuate; Based on the pump pressure fluctuation, the drilling to the salt layer is determined.

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