Twist joint control method and device for double-shoulder drill rod, electronic equipment and non-transient computer readable storage medium

Abstract

The invention discloses a twisting control method and device for a double-shoulder drill rod, electronic equipment and a non-transient computer readable storage medium. In the process that the male thread drill rod is connected with the female thread drill rod in a twisting mode at the first rotating speed, the value of torque borne by an external thread of the male thread drill rod and the rotating angle of the male thread drill rod are obtained in real time; a torque-rotation angle curve of the double-shoulder drill rod is generated in real time according to the torque value and the rotation angle; a target moment when a sudden change point appears on the torque-corner curve is determined based on a predetermined standard torque-curve, the male buckle drill rod is controlled to twist at a second rotating speed after the target moment, and the second rotating speed is smaller than the first rotating speed; the standard torque-corner curve is a torque-corner curve corresponding to the twisting process of the single-shoulder drill rod; and in the process of twisting the male buckle drill rod at the second rotating speed, the torque value of the male buckle drill rod is compared with a preset torque threshold value in real time, when the torque value of the male buckle drill rod is equal to the preset torque threshold value, twisting of the male buckle drill rod is stopped, and the service life of the double-shoulder drill rod is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of oil drilling equipment, and in particular to a method, device, electronic equipment and non-transitory computer-readable storage medium for controlling the twisting of a double-shouldered drill pipe. Background Art

[0002] In the field of oil and gas exploration and development, drill pipe is the core equipment in drilling operations, and its performance and stability have a direct and critical impact on the efficiency and safety of drilling operations. With the continuous advancement of drilling technology, double-shouldered drill pipe has become the first choice for modern drilling operations due to its excellent tensile and bending resistance and reliable sealing performance. However, the twisting process of double-shouldered drill pipe is a complex and delicate operation link, and its accuracy and stability have a decisive influence on the overall performance and service life of the drill pipe.

[0003] The double shoulder drill pipe joint adopts a special threaded connection method, which sets two bearing surfaces, the main torque shoulder surface and the auxiliary torque shoulder surface. The contact state of the auxiliary torque shoulder surface after the threaded connection is completed plays a vital role in the service life and safety performance of the entire threaded connection, especially when subjected to composite loads such as tension, torsion, and bending, its fatigue life faces severe tests. However, since the auxiliary torque shoulder surface is usually located on the inner surface side of the threaded connection and is difficult to observe directly, it has traditionally relied on manual operation and experience judgment to perform twisting, resulting in the difficulty in effectively guaranteeing the twisting accuracy. Summary of the invention

[0004] The embodiment of the present application provides a twisting control method, device, electronic device and non-transient computer-readable storage medium for a double-shoulder drill pipe. The method can realize precise control of the twisting process and ensure the accuracy and stability of the twisting by real-time monitoring of the torque value and the rotation angle and generating a torque-angle curve. At the same time, the method can also identify the mutation point on the torque-angle curve and adjust the rotation speed in time accordingly, thereby effectively avoiding the problem of poor twisting or damage caused by excessive rotation speed, and further improving the service life and safety of the double-shoulder drill pipe.

[0005] In a first aspect, an embodiment of the present application provides a method for controlling the twisting of a double-shouldered drill pipe, wherein the double-shouldered drill pipe comprises a box drill pipe and a pin drill pipe, wherein the box drill pipe is provided with a first secondary shoulder and an internal thread, and the pin drill pipe is provided with a second secondary shoulder and an external thread matching the first secondary shoulder and the internal thread, and the method comprises: During the process of twisting the male screw drill rod with the female screw drill rod at a first rotation speed, obtaining in real time the torque value applied to the external thread of the male screw drill rod and the rotation angle of the male screw drill rod; Generating a torque-rotation angle curve of the double-shouldered drill pipe in real time according to the torque value and the rotation angle; Determine a target time at which a mutation point appears on the torque-angle curve based on a predetermined standard torque-curve, and control the male drill rod to twist at a second speed after the target time, the second speed being less than the first speed; wherein the standard torque-angle curve is a torque-angle curve corresponding to a twisting process of a single shoulder drill rod; During the process of twisting the male drill rod at the second rotation speed, the torque value of the male drill rod and the preset torque threshold are compared in real time. When the torque value of the male drill rod is equal to the preset torque threshold, the twisting of the male drill rod is stopped.

[0006] In combination with the first aspect, in a possible implementation manner, determining the target time at which a mutation point appears on the torque-angle curve based on a predetermined standard torque-angle curve includes: Determine the current corresponding twisting stage of the double shoulder drill pipe on the torque-angle curve; When the double shoulder drill pipe enters the shoulder surface contact stage, the shoulder surface contact stage on the torque-angle curve is compared with the shoulder surface contact stage on the standard torque-angle curve in real time to determine the target moment when a mutation point appears on the torque-angle curve.

[0007] In combination with the first aspect, in a possible implementation manner, determining the current corresponding twisting stage of the double-shouldered drill pipe on the torque-angle curve includes: Calculating the slope corresponding to each moment on the torque-angle curve; determining a turning point on the torque-angle curve based on the slope; The torque-angle curve is divided into stages based on the turning point to determine the current twisting stage of the double-shouldered drill rod.

[0008] In combination with the first aspect, in a possible implementation manner, the real-time generation of the torque-angle curve of the double-shouldered drill rod according to the torque value and the rotation angle includes: The torque-angle curve of the double-shoulder drill pipe is generated in real time through the relationship between the torque value and the rotation angle; The relationship between the torque value and the rotation angle when the double shoulder drill pipe enters the shoulder surface contact stage is determined by the following formula:

[0009] In the formula, It is the real-time torque value after entering the shoulder surface contact stage; It is the rotation angle of the pin drill rod relative to the box drill rod when the second main shoulder contacts the shoulder surface of the first main shoulder and the second auxiliary shoulder does not contact the shoulder surface of the first auxiliary shoulder during the twisting process of the pin drill rod and the box drill rod; It is the rotation angle of the male thread drill rod relative to the box thread drill rod when the second main shoulder just contacts the shoulder surface of the first main shoulder; It is the rotation angle of the male thread drill rod relative to the box thread drill rod when the second shoulder just contacts the shoulder surface of the first shoulder; It is the rotation angle of the male thread drill rod relative to the box thread drill rod after the second shoulder contacts the shoulder surface of the first shoulder. If the second shoulder does not contact the shoulder surface of the first shoulder, = ; is the material elastic modulus of the double shoulder drill pipe; is the outer radius of the box of the box drill pipe; The inner diameter of the drill pipe for the male drill pipe; is the average radius of the nth circle of the internal thread; is the pitch of the nth internal thread; is the middle diameter of the external thread of the nth turn; It is the axial length of the incomplete thread where the internal thread and the external thread engage; It is the axial length of the complete thread of the internal and external threads; is the semi-taper of the external thread; The outer diameter of the large end of the external thread; is the average axial length between the large end of the internal thread and the second main shoulder; k is the outer diameter of the second secondary shoulder of the male drill pipe.

[0010] In combination with the first aspect, in a possible implementation, the twist control method of the double-shoulder drill pipe also includes: the rotation angle range proportion of the double-shoulder drill pipe in the shoulder surface contact stage is smaller than the rotation angle range proportion of the single-shoulder drill pipe in the corresponding stage.

[0011] In combination with the first aspect, in a possible implementation, during the process of twisting the male screw drill rod with the female screw drill rod at a first rotation speed, obtaining in real time a torque value applied to the external thread of the male screw drill rod includes: The torque value applied to the external thread of the male drill rod is obtained in real time through a torque sensor.

[0012] In combination with the first aspect, in a possible implementation, during the process of twisting the male screw drill rod with the female screw drill rod at a first rotation speed, obtaining the rotation angle of the male screw drill rod in real time includes: The angular velocity or acceleration of the male drill rod is acquired in real time by at least one of an angular velocity sensor and an acceleration sensor, and the rotation angle of the male drill rod is calculated based on the angular velocity or acceleration of the male drill rod.

[0013] In a second aspect, an embodiment of the present application provides a twist control device for a double-shouldered drill pipe, wherein the double-shouldered drill pipe comprises a box drill pipe and a pin drill pipe, wherein the box drill pipe is provided with a first secondary shoulder and an internal thread, and the pin drill pipe is provided with an external thread matching the internal thread and a second secondary shoulder, wherein the device comprises: A data acquisition module, used for acquiring in real time the torque value applied to the external thread of the male screw drill rod and the rotation angle of the male screw drill rod during the process of twisting the male screw drill rod with the female screw drill rod at a first rotation speed; A data processing module, generating a torque-rotation angle curve of the double-shouldered drill pipe in real time according to the torque value and the rotation angle; A control module, for determining a target time at which a mutation point appears on the torque-angle curve based on a predetermined standard torque-angle curve, and controlling the male drill rod to twist at a second speed after the target time, the second speed being less than the first speed; wherein the standard torque-angle curve is a torque-angle curve corresponding to a twisting process of a single shoulder drill rod; The data comparison module is used to compare the torque value of the male drill rod with a preset torque threshold in real time during the process of the male drill rod being twisted at the second speed, and stop twisting the male drill rod when the torque value of the male drill rod is equal to the preset torque threshold.

[0014] In a third aspect, an embodiment of the present application provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for controlling the twisting of the double-shoulder drill rod as described in the first aspect or any possible method of the first aspect is implemented.

[0015] In a fourth aspect, an embodiment of the present application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the twisting control method of the double-shoulder drill pipe as described in the first aspect or any possible one of the first aspects.

[0016] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects: The twisting control method of the double-shoulder drill pipe provided in the embodiment of the present application can accurately control the twisting process and ensure the twisting accuracy and stability by real-time monitoring of the torque value and the rotation angle and generating a torque-angle curve accordingly. The method can identify the mutation point on the torque-angle curve and adjust the rotation speed in time, effectively avoiding the problem of poor twisting or damage caused by excessive rotation speed, and improving the service life and safety of the double-shoulder drill pipe. The method realizes real-time monitoring and automatic control of the twisting process, significantly reduces manual intervention, and improves the automation level and production efficiency of the production process.

[0017] The twisting control device of the double shoulder drill rod provided by the embodiment of the present application, the data acquisition module can capture the torque value and rotation angle of the male screw drill rod in the twisting process in real time, and provide accurate basic data for subsequent data processing and control. This real-time monitoring capability ensures the controllability and stability of the twisting process. Through the torque-angle curve generated in real time by the data processing module, the control module can intelligently identify the mutation point on the torque-angle curve, which usually marks the contact between the first shoulder and the second shoulder. After identifying the mutation point, the control module can automatically adjust the rotation speed of the male screw drill rod from the higher first speed to the lower second speed, thereby avoiding connection damage or failure caused by excessive twisting. The data comparison module compares the torque value and the preset torque threshold in real time during the twisting of the male screw drill rod at the second speed. Once the torque value reaches the preset torque threshold, it means that the double shoulder drill rod has reached the ideal connection state, and the control module will stop twisting immediately at this time, thereby ensuring the efficiency and safety of the twisting process. Through precise torque control and speed adjustment, the embodiment of the present application can ensure that the double-shoulder drill pipe forms a tight and stable connection during the twisting process, thereby improving the continuity and efficiency of oil exploration operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A flow chart of a method for controlling the twisting of a double-shoulder drill pipe provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a double-shoulder drill rod provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a male drill rod provided in an embodiment of the present application; Figure 4 A schematic structural diagram of a first drill rod of a single shoulder drill rod provided in an embodiment of the present application; Figure 5 A cross-sectional view of a double shoulder drill pipe provided in an embodiment of the present application; Figure 6 A cross-sectional view of a single shoulder drill rod provided in an embodiment of the present application; Figure 7 A schematic diagram of a torque-angle curve provided in an embodiment of the present application; Figure 8 A schematic diagram comparing the torque-angle curve provided in the embodiment of the present application and the standard torque-angle curve.

[0020] Icons: 1-male drill pipe; 11-external thread; 12-second secondary shoulder; 13-second main shoulder; 2-female drill pipe; 3-spinning pliers; 4-punching pliers; 5-clamping pliers; 6-first drill pipe; 61-third main shoulder; 62-third external thread; 7-second drill pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0023] The present application embodiment provides a method for controlling the twist connection of a double-shoulder drill pipe, such as Figures 1 to 8The double shoulder drill pipe comprises a box drill pipe 2 and a pin drill pipe 1, wherein the box drill pipe 2 is provided with a first secondary shoulder and an internal thread, and the pin drill pipe 1 is provided with a second secondary shoulder 12 and an external thread 11 matching the first secondary shoulder and the internal thread. Specifically, the box drill pipe 2 is provided with a first main shoulder, and the pin drill pipe 1 is provided with a second main shoulder 13 matching the first main shoulder.

[0024] The method comprises the following steps: S1: During the process of twisting the male screw drill rod 1 with the female screw drill rod 2 at a first rotation speed, the torque value applied to the external thread 11 of the male screw drill rod 1 and the rotation angle of the male screw drill rod 1 are obtained in real time. These two parameters are key indicators for evaluating the twisting progress and status.

[0025] S2: Generate the torque-angle curve of the double-shoulder drill pipe in real time according to the torque value and the rotation angle. The torque-angle curve can intuitively reflect the relationship between the torque value and the rotation angle during the twisting process, as well as the dynamic changes of the twisting process.

[0026] S3: Determine the target time when a mutation point appears on the torque-angle curve based on a predetermined standard torque-curve, and control the male screw drill rod 1 to twist at a second speed after the target time, the second speed being less than the first speed. The standard torque-angle curve is the torque-angle curve corresponding to the twisting process of the single shoulder drill rod.

[0027] It should be noted that after the target moment, the rotation speed of the male drill pipe 1 is adjusted to a second rotation speed, which is lower than the first rotation speed. The purpose of this adjustment is to slow down the twisting speed, thereby more accurately controlling the twisting process and avoiding poor twisting or damage caused by excessive rotation speed.

[0028] Specifically, the torque-angle curve described in the present application shows the relationship between the torque value on the external thread 11 of the male screw drill rod 1 of the double shoulder drill rod and the rotation angle of the male screw drill rod 1 during the make-up process. This process can be divided into three stages: the first stage is the non-thread interference stage, the second stage is the thread interference stage, and the third stage is the shoulder surface contact stage. Among them, the shoulder surface contact stage of the double shoulder drill rod is further subdivided into the main shoulder surface contact stage and the secondary shoulder surface contact stage.

[0029] For a single-shoulder drill rod, it includes a first drill rod 6 and a second drill rod 7. The first drill rod 6 is provided with a third main shoulder 61 and a third external thread 62, while the second drill rod 7 is provided with a fourth main shoulder and a fourth internal thread matching the third main shoulder 61 and the third external thread 62. The standard torque-angle curve describes the relationship between the torque value and the rotation angle of the third external thread 62 of the first drill rod 6 of the single-shoulder drill rod during the make-up process. This process is also divided into three stages: the non-thread interference stage, the thread interference stage, and the shoulder surface contact stage (the shoulder surface contact stage here refers only to the main shoulder surface contact stage).

[0030] In the present application, special attention is paid to the secondary shoulder surface contact stage after the target time. After entering the secondary shoulder surface contact stage, the male thread drill rod 1 is controlled to twist at a second rotation speed.

[0031] like Figure 3 and Figure 4 As shown, the main difference is that a second auxiliary shoulder 12 is added to the end of the male threaded drill pipe 1. The second auxiliary shoulder 12 not only has the functions of assisting the buckle positioning, sharing the load and assisting the sealing, but also can effectively improve the joint's insufficient tensile and bending resistance, severe stress concentration and other problems.

[0032] like Figure 6 As shown, after the twisting of the single-shoulder drill pipe is completed, the maximum torque value is provided by the contact between the third main shoulder 61 and the fourth main shoulder.

[0033] like Figure 5 As shown, compared with the single-shoulder drill pipe, the maximum torque value of the double-shoulder drill pipe after the twisting is completed is provided by the contact between the first auxiliary shoulder and the second auxiliary shoulder 12, and the first main shoulder, the second main shoulder 13 and the first auxiliary shoulder, the second auxiliary shoulder 12 bear the torque at the same time. Therefore, the torque value rises significantly faster than the single-shoulder drill pipe, which is conducive to reaching the required torque value faster during the drilling process and improving the drilling efficiency.

[0034] S4: In the process of twisting the male screw drill rod 1 at the second rotation speed, the torque value of the male screw drill rod 1 and the preset torque threshold are compared in real time. When the torque value of the male screw drill rod 1 is equal to the preset torque threshold, the twisting of the male screw drill rod 1 is stopped.

[0035] The preset torque threshold is derived from a series of carefully designed experiments to determine the optimal torque range required during the twist-off process of double-shouldered drill pipe.

[0036] Specifically, when the torque value of the male screw drill rod 1 reaches a preset torque threshold, it is considered that the twisting process is completed, and the twisting of the male screw drill rod 1 is stopped at this time.

[0037] It should be noted that the twisting control method of the double-shoulder drill pipe provided in the embodiment of the present application can accurately control the twisting process and ensure the twisting accuracy and stability by real-time monitoring of the torque value and the rotation angle and generating a torque-angle curve accordingly. The method can identify the mutation point on the torque-angle curve and adjust the rotation speed in time, effectively avoiding the problem of poor twisting or damage caused by too fast rotation speed, and improving the service life and safety of the double-shoulder drill pipe. The method realizes real-time monitoring and automatic control of the twisting process, significantly reduces manual intervention, and improves the automation level and production efficiency of the production process.

[0038] In actual work, after the basic information is entered, the iron driller starts the connection operation of the double shoulder drill pipe. Generally speaking, the twisting process of the double shoulder drill pipe is as follows: the iron driller first uses the clamping pliers 5 to clamp the box drill pipe 2, and then uses the screwing pliers 3 to quickly screw the external thread 11 of the male drill pipe 1 into the internal thread of the female drill pipe 2 until it can no longer be screwed. At this time, the iron driller uses the punching pliers 4 to act on the second main shoulder 13 of the male drill pipe 1. Generally speaking, the clockwise rotation of the punching pliers 4 is the screwing action, which will drive the external thread 11 and the internal thread to further connect until the two are fully connected.

[0039] Similarly, when breaking out, the iron roughneck first uses the clamping pliers 5 to clamp the box drill pipe 2, and then uses the punching pliers 4 to clamp the pin drill pipe 1. Generally speaking, the counterclockwise rotation of the punching pliers 4 is the breaking out action. When the external threads 11 and internal threads of the pin drill pipe 1 and the box drill pipe 2 begin to loosen and break out, the screwing pliers 3 will drive the pin drill pipe 1 to quickly screw out the internal threads of the box drill pipe 2.

[0040] In the embodiment of the present application, determining the target time when a mutation point appears on the torque-angle curve based on a predetermined standard torque-angle curve includes: Determine the current corresponding twisting stage of the double shoulder drill pipe on the torque-angle curve.

[0041] When the double-shouldered drill pipe enters the shoulder surface contact stage, the shoulder surface contact stage on the torque-rotation angle curve is compared with the shoulder surface contact stage on the standard torque-rotation angle curve in real time to determine the target moment when the mutation point appears on the torque-rotation angle curve.

[0042] It should be noted that the shoulder surface contact stage of the double shoulder drill pipe includes the main shoulder surface contact stage and the subsequent secondary shoulder surface contact stage. In the connection operation, the double shoulder drill pipe first experiences the main shoulder surface contact stage and then enters the secondary shoulder surface contact stage. The intersection of these two stages, that is, the moment when the main shoulder is about to reach full contact and the secondary shoulder begins to contact, marks the appearance of the mutation point on the torque-angle curve, which is the target moment we need to pay attention to.

[0043] This application only needs to compare the main shoulder surface contact stage on the torque-angle curve with the corresponding stage on the predetermined standard torque-angle curve in real time. In view of the fact that the torque-angle curve and the standard curve usually show a high degree of consistency in the non-thread interference stage and the thread interference stage before the main shoulder surface contact stage, this application avoids redundant comparisons in non-critical stages by focusing on the changes after the main shoulder surface contact stage, thereby significantly improving the efficiency of the entire comparison process.

[0044] In the embodiment of the present application, determining the current corresponding twisting stage of the double shoulder drill pipe on the torque-angle curve includes: Calculate the slope corresponding to each moment on the torque-angle curve to obtain the slope change of the torque-angle curve at different stages; The turning point on the torque-angle curve is determined based on the slope. The turning point marks a significant change in the slope and is an important basis for dividing different torsion stages.

[0045] The torque-angle curve is divided into stages based on the turning points to determine the current twisting stage of the double-shouldered drill pipe.

[0046] It should be noted that, during the twisting process of the double-shouldered drill pipe, when the first main shoulder and the second main shoulder 13 are in contact, it indicates that the twisting of the male buckle drill pipe 1 and the female buckle drill pipe 2 has entered the shoulder surface contact stage. At this time, the torque-angle curve will show certain characteristics. When the first secondary shoulder and the second secondary shoulder 12 are in contact, the slope of the torque-angle curve will rise significantly due to the additional resistance added by the contact of the two secondary shoulders, and this slope will be greater than the slope before this stage. This feature provides an important basis for accurately judging the current corresponding twisting stage of the double-shouldered drill pipe. Therefore, the present application can accurately identify the characteristics of the double-shouldered drill pipe at different twisting stages by accurately calculating and analyzing the slope changes of the torque-angle curve, and provide real-time connection status feedback to the operator, which not only helps to optimize the connection process, improve the connection efficiency and quality, but also provides strong data support for subsequent fault analysis and diagnosis.

[0047] Specifically, Figure 7 As shown, the torque value in the non-thread interference stage changes slightly with the rotation angle of the male screw drill rod 1 as the male screw drill rod 1 is screwed in.

[0048] When entering the thread interference stage, as the rotation angle of the male screw drill rod 1 changes in real time, the external threads 11 and internal threads of the male screw drill rod 1 and the box screw drill rod 2 begin to undergo extrusion deformation, thereby generating stress between the threads. This stress is converted into friction force and reflected in the torque value of the male screw drill rod 1. As the male screw drill rod 1 twists, the shoulder surface of the second main shoulder 13 of the male screw drill rod 1 continuously approaches the shoulder surface of the first main shoulder of the box screw drill rod 2.

[0049] Since the present application focuses on the last stage - the shoulder surface contact stage, it is mainly necessary to explain the relationship between the torque value and the rotation angle in this stage.

[0050] In the embodiment of the present application, the torque-angle curve of the double-shouldered drill pipe is generated in real time according to the torque value and the rotation angle, including: The torque-angle curve of the double-shouldered drill pipe is generated in real time through the relationship between the torque value and the rotation angle; The relationship between the torque value and the rotation angle of the double shoulder drill pipe entering the shoulder surface contact stage is determined by the following formula:

[0051] In the formula, It is the real-time torque value after entering the shoulder surface contact stage; It is the rotation angle of the pin drill rod 1 relative to the box drill rod 2 when the second main shoulder 13 contacts the shoulder surface of the first main shoulder and the second auxiliary shoulder 12 does not contact the shoulder surface of the first auxiliary shoulder during the twisting process of the pin drill rod 1 and the box drill rod 2; is the rotation angle of the male thread drill rod 1 relative to the box thread drill rod 2 when the second main shoulder 13 just contacts the shoulder surface of the first main shoulder; is the rotation angle of the male thread drill rod 1 relative to the box thread drill rod 2 when the second secondary shoulder 12 just contacts the shoulder surface of the first secondary shoulder; is the rotation angle of the male thread drill rod 1 relative to the box thread drill rod 2 after the second shoulder 12 contacts the shoulder surface of the first shoulder. If the second shoulder 12 does not contact the shoulder surface of the first shoulder, = ; is the material elastic modulus of the double shoulder drill pipe; is the outer radius of the box of the box drill rod 2; is the inner diameter of the drill rod of the male drill rod 1; is the average radius of the nth circle of the internal thread; is the pitch of the nth internal thread; is the middle diameter of the external thread 11 of the nth turn; is the axial length of the incomplete thread of the internal thread and the external thread 11; is the axial length of the complete thread of the internal thread and the external thread 11; is the half taper of the external thread 11; is the outer diameter of the large end of the external thread 11; is the average axial length between the large end of the internal thread and the second main shoulder 13; k is the outer diameter of the second secondary shoulder 12 of the male drill pipe 1.

[0052] The standard torque-angle curve is obtained in the same manner as above, and will not be described in detail in this application.

[0053] In the embodiment of the present application, the rotation angle range ratio of the double-shouldered drill pipe in the shoulder surface contact stage is smaller than the rotation angle range ratio of the single-shouldered drill pipe in the corresponding stage.

[0054] When the torque value of the male thread drill pipe 1 reaches the preset torque threshold, it usually means that the first secondary shoulder and the second secondary shoulder 12 have contacted each other. In the three stages (non-thread interference stage, thread interference stage and shoulder surface contact stage) experienced by the double shoulder drill pipe, the contact between the first secondary shoulder and the second secondary shoulder 12 adds additional resistance, resulting in the torque value accumulating a large value before reaching the preset torque threshold, thereby reducing the amount of rotation required for the subsequent shoulder surface contact stage. Therefore, the rotation angle range of the double shoulder drill pipe in the shoulder surface contact stage accounts for a smaller proportion than the rotation angle range of the single shoulder drill pipe in the corresponding stage.

[0055] In addition, if the first and second secondary shoulders 12 are still not in contact when the torque reaches the preset torque threshold, the rotation angle range ratio of the double shoulder drill pipe in the shoulder surface contact stage will be the same as the rotation angle range ratio of the single shoulder drill pipe in the corresponding stage. The rotation angle range ratio of the single shoulder drill pipe in the corresponding stage is obtained through theoretical calculation, which serves as an important reference value for evaluating whether the connection state of the double shoulder drill pipe meets expectations.

[0056] In the embodiment of the present application, during the process of twisting the male screw drill rod 1 with the female screw drill rod 2 at the first rotation speed, the torque value of the external thread 11 of the male screw drill rod 1 is obtained in real time, including: The torque value applied to the external thread 11 of the male drill rod 1 is obtained in real time through the torque sensor.

[0057] It should be noted that, firstly, a torque sensor is used to obtain in real time the torque value at the external thread 11 of the male drill rod 1. The torque sensor can accurately capture the change of torque during the twisting process, providing reliable data support for subsequent analysis and control.

[0058] However, the implementation of the present application is not limited to the use of torque sensors. In order to expand the means of acquisition and enhance the flexibility of the system, other types of sensors, such as pressure sensors and mechanical sensors, may also be considered.

[0059] The pressure sensor can obtain the pressure change of the male drill rod 1 during the twisting process. There is a certain relationship between this pressure change and the torque value. By analyzing the pressure data, the torque value can be indirectly calculated, thereby realizing the monitoring of the twisting process.

[0060] The mechanical sensor can more comprehensively capture the mechanical behavior of the male drill rod 1 during the twisting process. It can not only obtain the torque value, but also other mechanical parameters, such as axial force, shear force, etc. The acquisition of these parameters is crucial for researchers because they help to more deeply understand the mechanical characteristics of the twisting process and provide strong data support for subsequent optimization and improvement.

[0061] In the embodiment of the present application, in the process of twisting the male screw drill rod 1 with the female screw drill rod 2 at a first rotation speed, the rotation angle of the male screw drill rod 1 is obtained in real time, including: The angular velocity or acceleration of the male drill rod 1 is acquired in real time by at least one of an angular velocity sensor and an acceleration sensor, and the rotation angle of the male drill rod 1 is calculated based on the angular velocity or acceleration of the male drill rod 1 .

[0062] The embodiment of the present application provides a twisting control device for a double-shoulder drill pipe, the double-shoulder drill pipe comprises a box drill pipe 2 and a pin drill pipe 1, the box drill pipe 2 is provided with a first secondary shoulder and an internal thread, the pin drill pipe 1 is provided with an external thread 11 matching the internal thread and a second secondary shoulder 12, the device comprises: The data acquisition module is used to obtain the torque value applied to the external thread 11 of the male screw drill rod 1 and the rotation angle of the male screw drill rod 1 in real time during the process of twisting the male screw drill rod 1 with the female screw drill rod 2 at a first rotation speed.

[0063] The data processing module generates the torque-angle curve of the double-shouldered drill pipe in real time according to the torque value and the rotation angle.

[0064] The control module is used to determine the target time when a mutation point appears on the torque-angle curve based on a predetermined standard torque-angle curve, and control the male screw drill rod 1 to twist at a second speed after the target time, and the second speed is less than the first speed. The standard torque-angle curve is the torque-angle curve corresponding to the twisting process of the single shoulder drill rod.

[0065] The data comparison module is used to compare the torque value of the male drill rod 1 and the preset torque threshold in real time when the male drill rod 1 is twisted at the second speed, and stop twisting the male drill rod 1 when the torque value of the male drill rod 1 is equal to the preset torque threshold.

[0066] It should be noted that the data acquisition module can capture the torque value and rotation angle of the male drill rod 1 in real time during the twisting process, providing accurate basic data for subsequent data processing and control. This real-time monitoring capability ensures the controllability and stability of the twisting process. Through the torque-angle curve generated in real time by the data processing module, the control module can intelligently identify the mutation point on the torque-angle curve, which usually marks the contact between the first and second shoulder 12. After identifying the mutation point, the control module can automatically adjust the rotation speed of the male drill rod 1 from the higher first speed to the lower second speed, thereby avoiding connection damage or failure caused by excessive twisting. The data comparison module compares the torque value and the preset torque threshold in real time during the twisting of the male drill rod 1 at the second speed. Once the torque value reaches the preset torque threshold, it indicates that the double shoulder drill rod has reached the ideal connection state. At this time, the control module will immediately stop twisting, thereby ensuring the efficiency and safety of the twisting process. Through precise torque control and speed adjustment, the embodiment of the present application can ensure that the double-shoulder drill pipe forms a tight and stable connection during the twisting process, thereby improving the continuity and efficiency of oil exploration operations.

[0067] An embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned method for controlling the twisting connection of a double-shoulder drill rod is implemented.

[0068] It should be noted that the electronic device can automatically execute the twisting control method of the double-shoulder drill pipe without manual intervention, thereby improving the degree of automation of the twisting process. At the same time, through the built-in algorithm and logical judgment, the electronic device can intelligently adjust the twisting strategy to ensure the stability and reliability of the twisting process.

[0069] An embodiment of the present application provides a non-transitory computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the above-mentioned method for controlling the twisting connection of a double-shoulder drill rod is implemented.

[0070] It should be noted that the present application realizes the automatic control of the twisting process of the double-shoulder drill pipe through the execution of the computer program, avoiding the tediousness and errors of manual operation and improving work efficiency. The computer program can accurately control various parameters in the twisting process, such as torque, angle, etc., to ensure the stability and reliability of the twisting process.

[0071] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0072] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present application.

Claims

1. A method for controlling the twisting of a double-shoulder drill pipe, characterized in that: The double-shouldered drill rod comprises a box drill rod (2) and a pin drill rod (1), the box drill rod (2) being provided with a first secondary shoulder and an internal thread, and the pin drill rod (1) being provided with a second secondary shoulder (12) and an external thread (11) matching the first secondary shoulder and the internal thread, and the method comprising: During the process of the male screw drill rod (1) and the female screw drill rod (2) being twisted together at a first rotation speed, the torque value applied to the external thread (11) of the male screw drill rod (1) and the rotation angle of the male screw drill rod (1) are obtained in real time; Generating a torque-rotation angle curve of the double-shouldered drill pipe in real time according to the torque value and the rotation angle; Based on a predetermined standard torque-rotation curve, a target time at which a mutation point appears on the torque-rotation angle curve is determined, and after the target time, the male drill rod (1) is controlled to twist at a second rotation speed, the second rotation speed being less than the first rotation speed; wherein the standard torque-rotation angle curve is a torque-rotation angle curve corresponding to a twisting process of a single shoulder drill rod; In the process of twisting the male drill rod (1) at the second rotation speed, the torque value of the male drill rod (1) and the preset torque threshold are compared in real time; when the torque value of the male drill rod (1) is equal to the preset torque threshold, the twisting of the male drill rod (1) is stopped.

2. The method for controlling the twisting of a double-shoulder drill pipe according to claim 1, characterized in that: The step of determining the target time when a mutation point appears on the torque-angle curve based on a predetermined standard torque-angle curve comprises: Determine the current corresponding twisting stage of the double shoulder drill pipe on the torque-angle curve; When the double shoulder drill pipe enters the shoulder surface contact stage, the shoulder surface contact stage on the torque-angle curve is compared with the shoulder surface contact stage on the standard torque-angle curve in real time to determine the target moment when a mutation point appears on the torque-angle curve.

3. The method for controlling the twisting of a double-shoulder drill pipe according to claim 2, characterized in that: The step of determining the current corresponding twisting stage of the double-shouldered drill pipe on the torque-angle curve comprises: Calculating the slope corresponding to each moment on the torque-angle curve; determining a turning point on the torque-angle curve based on the slope; The torque-angle curve is divided into stages based on the turning point to determine the current twisting stage of the double-shouldered drill pipe.

4. The method for controlling the twist connection of a double-shoulder drill pipe according to claim 2, characterized in that: The method of generating the torque-rotation angle curve of the double-shouldered drill pipe in real time according to the torque value and the rotation angle comprises: The torque-angle curve of the double-shoulder drill pipe is generated in real time through the relationship between the torque value and the rotation angle; The relationship between the torque value and the rotation angle when the double shoulder drill pipe enters the shoulder surface contact stage is determined by the following formula: In the formula, It is the real-time torque value after entering the shoulder surface contact stage; The invention relates to a rotation angle of the pin drill rod (1) relative to the box drill rod (2) when the second main shoulder (13) contacts the shoulder surface of the first main shoulder and the second auxiliary shoulder (12) does not contact the shoulder surface of the first auxiliary shoulder during the twisting process of the pin drill rod (1) and the box drill rod (2); is the rotation angle of the male threaded drill rod (1) relative to the female threaded drill rod (2) when the second main shoulder (13) just contacts the shoulder surface of the first main shoulder; is the rotation angle of the male thread drill rod (1) relative to the female thread drill rod (2) when the second secondary shoulder (12) just contacts the shoulder surface of the first secondary shoulder; is the rotation angle of the male thread drill rod (1) relative to the female thread drill rod (2) after the second secondary shoulder (12) contacts the shoulder surface of the first secondary shoulder. If the second secondary shoulder (12) does not contact the shoulder surface of the first secondary shoulder, = ; is the material elastic modulus of the double shoulder drill pipe; is the outer radius of the box of the box drill rod (2); is the inner diameter of the male drill rod (1); is the average radius of the nth circle of the internal thread; is the pitch of the nth internal thread; is the median diameter of the external thread (11) of the nth turn; is the axial length of the incomplete thread of the internal thread and the external thread (11); The axial length of the complete thread of the internal thread and the external thread (11); is the semi-taper of the external thread (11); The outer diameter of the large end of the external thread (11); is the average axial length between the large end of the internal thread and the second main shoulder (13); and k is the outer diameter of the second secondary shoulder (12) of the male drill rod (1).

5. The method for controlling the twisting of a double-shouldered drill pipe according to claim 1, characterized in that: Also includes: The rotation angle range ratio of the double-shouldered drill pipe in the shoulder surface contact stage is smaller than the rotation angle range ratio of the single-shouldered drill pipe in the corresponding stage.

6. The method for controlling the twist connection of a double-shouldered drill pipe according to claim 1, characterized in that: During the process of twisting the male thread drill rod (1) with the female thread drill rod (2) at a first rotation speed, the torque value applied to the external thread (11) of the male thread drill rod (1) is obtained in real time, including: The torque value applied to the external thread (11) of the male drill rod (1) is obtained in real time through a torque sensor.

7. The method for controlling the twisting of a double-shoulder drill pipe according to claim 1, characterized in that: During the process of twisting the male screw drill rod (1) with the female screw drill rod (2) at a first rotation speed, obtaining the rotation angle of the male screw drill rod (1) in real time, comprising: The angular velocity or acceleration of the male drill rod (1) is acquired in real time by at least one of an angular velocity sensor and an acceleration sensor, and the rotation angle of the male drill rod (1) is calculated based on the angular velocity or acceleration of the male drill rod (1).

8. A twist control device for a double-shoulder drill pipe, characterized in that: The double-shoulder drill rod comprises a box drill rod (2) and a pin drill rod (1), the box drill rod (2) being provided with a first secondary shoulder and an internal thread, and the pin drill rod (1) being provided with an external thread (11) matching the internal thread and a second secondary shoulder (12), the device comprising: A data acquisition module, used for acquiring in real time the torque value applied to the external thread (11) of the male screw drill rod (1) and the rotation angle of the male screw drill rod (1) during the process of the male screw drill rod (1) being twisted with the female screw drill rod (2) at a first rotation speed; A data processing module, generating a torque-rotation angle curve of the double-shouldered drill pipe in real time according to the torque value and the rotation angle; A control module is used to determine a target time at which a mutation point appears on the torque-angle curve based on a predetermined standard torque-angle curve, and control the male drill rod (1) to twist at a second speed after the target time, the second speed being less than the first speed; wherein the standard torque-angle curve is a torque-angle curve corresponding to a twisting process of a single shoulder drill rod; The data comparison module is used to compare the torque value of the male drill rod (1) and a preset torque threshold in real time when the male drill rod (1) is twisted at the second rotation speed, and to stop twisting the male drill rod (1) when the torque value of the male drill rod (1) is equal to the preset torque threshold.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the twist-connection control method for the double-shoulder drill rod according to any one of claims 1 to 7 is implemented.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the twist-connection control method of a double-shouldered drill pipe as claimed in any one of claims 1 to 7 is implemented.

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