Method and system for judging top drive to realize automatic buckling and fastening

Abstract

The invention discloses a method and system for judging that a top drive achieves automatic buckling and fastening, and the method comprises the steps: receiving a top buckling instruction, enabling a drilling platform control system to lower a traveling block carrying a tubular column, and starting an automatic spinning mode when it is detected that the traveling block is lowered to a preset position; acquiring top drive real-time torque data, and based on the top drive real-time torque data, judging whether the current top drive protection joint and the tubular column joint are successfully buckled or not in combination with a position indication signal indicating that the tubular column enters a horn mouth of a top drive back-up wrench and displacement data of a top drive balance oil cylinder; and receiving a fastening instruction after successful fastening, and diagnosing the in-place state of the top drive knob by detecting the clamping state of the top drive back-up wrench and the real-time torque data of the top drive. According to the invention, the information acquisition assembly is additionally arranged at the specified position on the existing ground drilling platform, and the corresponding detection and judgment logic is designed, so that the automatic control of the buckling and spinning operations of the tubular column is effectively realized.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling control, and particularly to a method and system for determining automatic threading and tightening of a top drive. Background Art

[0002] Currently, before lowering the pipe string, it is necessary to connect the protective joint of the top drive to the internal thread of the joint of the drill string (also known as the pipe string or stand). After connection, the internal circulation of the pipe string through which high-pressure mud passes can be established.

[0003] However, the operations of the conventional top drive that require connecting stands for drilling are all manual operations, which not only increases the labor intensity of personnel but also results in low efficiency of the stand connection operation.

[0004] Therefore, the prior art needs to provide a control solution for automatically connecting the top drive to the pipe string. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic control solution for realizing the connection between the top drive and the pipe string.

[0006] To solve the above technical problems, an embodiment of the present invention provides a method for determining automatic threading and tightening of a top drive, including: Step 1, receiving a top threading instruction and lowering the traveling block carrying the pipe string by the drilling platform control system, and when it is detected that the preset position is reached, starting the automatic screwing mode; Step 2, obtaining the real-time torque data of the top drive, and based on this, combining the position indication signal indicating the position where the pipe string enters the back-up tong bell mouth of the top drive and the displacement data of the balance cylinder of the top drive to determine whether the current protective joint of the top drive and the joint of the pipe string are successfully threaded; Step 3, after successful threading, receiving a tightening instruction, and diagnosing the in-place state of the top drive knob by detecting the clamping state of the back-up tong of the top drive and the real-time torque data of the top drive.

[0007] Preferably, Step 2 includes: judging whether the pipe string enters the back-up tong bell mouth of the top drive by detecting the triggering state of the position indication signal in real time; after entering, detecting whether the torque of the top drive reaches the threading position according to the real-time torque data of the top drive and the preset screwing torque threshold, and detecting whether the traveling block reaches the target position according to the displacement data and the preset displacement threshold, so as to determine that the current protective joint of the top drive and the joint of the pipe string are successfully threaded when the torque of the top drive reaches the threading position and the traveling block reaches the target position.

[0008] Preferably, when the position indication signal is not triggered, it is determined that the currently lowered pipe string enters the back-up tong bell mouth of the top drive; otherwise, it is determined that the currently lowered pipe string does not enter the back-up tong bell mouth of the top drive.

[0009] Preferably, it is detected whether the pipe string enters the bell mouth of the top drive back-up tongs through a proximity switch installed on the torque reaction frame of the top drive back-up tongs; the displacement data is detected through a displacement sensor installed in the top drive balance cylinder.

[0010] Preferably, when the automatic make-up mode is turned on, the second step further includes: turning on the pressure control valve for the top drive balance cylinder so that the upward pulling force received by the top drive balance cylinder is less than the gravity of the top drive itself; sending an instruction to the drilling rig control system to continue lowering the traveling block.

[0011] Preferably, the method further includes: receiving a bottom make-up instruction, aligning the elevator with the wellhead center by detecting the change state of the elevator inclination angle, so that the current pipe string is supported by the drill floor manipulator and positioned at the wellhead center, and then the traveling block is lowered by the drilling rig control system; receiving and detecting the elevator load signal, after the elevator load signal disappears, generating a first control instruction for controlling the drilling rig control system to lower the traveling block according to a preset first lowering height, and making the drilling rig control system lower the traveling block by the first lowering height under the action of the first control instruction, so as to complete the bottom pipe string make-up task; and feeding back a signal indicating that the top of the pipe string is made up.

[0012] Preferably, the first step includes: after completing the bottom pipe string make-up and obtaining the top make-up instruction, generating a second control instruction for controlling the drilling rig control system to continue lowering the traveling block according to a preset second lowering height, and making the drilling rig control system lower the traveling block to the bell mouth of the top drive under the action of the second control instruction to turn on the automatic make-up mode.

[0013] Preferably, the third step includes: obtaining the top drive back-up tongs pressure data in real time and judging whether the make-up action reaches the clamping state based on this; when reaching the clamping state, detecting whether the top drive and the top of the pipe string are tightly made up according to the top drive real-time torque data and a preset make-up torque threshold, wherein when the top drive real-time torque data reaches or exceeds the preset make-up torque threshold, it is determined that the current top drive and the top of the pipe string reach the tightly made-up state.

[0014] Preferably, according to the top drive back-up tongs pressure data and a preset back-up tongs pressure threshold, it is judged whether the current make-up action reaches the clamping state, wherein when the top drive back-up tongs pressure data reaches or exceeds the preset back-up tongs pressure threshold, it is determined that the clamping state is reached, otherwise, the clamping state is not reached, and the top drive back-up tongs pressure data is obtained through a pressure sensor arranged at the rodless chamber oil port of the top drive back-up tongs.

[0015] On the other hand, an embodiment of the present invention further provides a system for determining automatic coupling and tightening of a top drive. The system is used to implement the method as described above. Wherein, the system includes: an information detection component, which is used to collect in real time the real-time torque data of the top drive, a position indication signal indicating the position where the pipe string enters the bell mouth of the back clamp of the top drive, the displacement data of the balance cylinder of the top drive, and the clamping state of the back clamp of the top drive; a top drive control device, which is used to receive a top coupling instruction and lower the traveling block carrying the pipe string by the drilling platform control system, so as to start the automatic screwing mode when it is detected that the traveling block is lowered to a preset position. After that, the real-time torque data of the top drive is obtained, and based on this, combined with the position indication signal indicating the position where the pipe string enters the bell mouth of the back clamp of the top drive and the displacement data of the balance cylinder of the top drive, it is judged whether the current protection joint of the top drive and the pipe joint are successfully coupled. And, after the coupling is successful, receive a tightening instruction, and diagnose the in-place state of the top drive knob by detecting the clamping state of the back clamp of the top drive and the real-time torque data of the top drive.

[0016] Compared with the prior art, one or more of the above embodiments may have the following advantages or beneficial effects:

[0017] The present invention proposes a method and a system for determining automatic coupling and tightening of a top drive. The method and the system are achieved by installing sensors such as a lifting ring inclination sensor, a back clamp pressure sensor, and a back clamp proximity switch on the top drive, installing a load signal sensor on the elevator, and installing a displacement sensor in the balance cylinder of the top drive. Among them, a pressure sensor is added to the outlet of the rodless cavity of the valve group back clamp to detect the pressure in the rodless cavity of the back clamp and judge whether the back clamp is clamped; the top drive adds a balance cylinder detection (pressure or stroke) or other better methods to judge whether the coupling and screwing are successful; the angle sensor is fixed on the lifting ring to realize the feedback of the inclination angle of the lifting ring. The present invention starts to calculate the lowering height after the traveling block is lowered and the load signal of the elevator is lost, and the top drive starts the screwing mode. If the screwing torque is not reached or the signal of the back clamp proximity switch is triggered, it is determined that the coupling fails; if the screwing torque is reached and the balance cylinder sensor has a signal, it is determined that the screwing is successful. After the screwing is successful, the back clamp is clamped, and after the clamping feedback is obtained, the threading starts, and the threading reaches the set torque and completes the whole operation. In this way, the present invention effectively realizes the automatic control of the pipe string coupling and screwing operations by installing information collection components at designated positions on the existing surface drilling platform and designing corresponding detection and judgment logics, effectively improves the operation efficiency, and reduces the workload of the ground staff.

[0018] Other features and advantages of the present invention will be described in the subsequent description, and, in part, will be obvious from the description, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures specifically pointed out in the description, the claims, and the drawings. Description of the Drawings

[0019] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the steps of the method for determining the automatic coupling and tightening of the top drive in the embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of the specific process of the method for determining the automatic coupling and tightening of the top drive in the embodiment of the present application.

[0022] Figure 3 It is a schematic diagram of the structure of the system for determining the automatic coupling and tightening of the top drive in the embodiment of the present application. Detailed implementation manners

[0023] The following will describe in detail the implementation manners of the present invention in conjunction with the accompanying drawings and embodiments, so as to fully understand how the present invention uses technical means to solve technical problems and achieve the implementation process of technical effects and implement accordingly. It should be noted that as long as there is no conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0024] In addition, the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0025] The terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms "a" and "an" used herein are also intended to include the plural. It should also be understood that the terms "comprises" and / or "comprising" used herein specify the presence of the stated features, integers, steps, operations, units and / or components, and do not exclude the presence or addition of one or more other features, integers, steps, operations, units, components and / or their combinations.

[0026] In order to solve the technical problems in the above-mentioned background technology, the embodiments of the present application propose a method and a system for determining the automatic coupling and tightening of the top drive. By installing a sling inclination sensor, a back-up tong pressure sensor, a back-up tong proximity switch on the top drive, a load signal sensor on the elevating bail, and a displacement sensor on the top drive balance cylinder, the method and system can automatically realize the entire make-up operation of the stand, including bottom coupling, top coupling and top tightening.

[0027] Figure 1This is a schematic diagram of the steps of the method for determining the automatic buckling and tightening of the top drive in the embodiment of the present application. Figure 1 , the specific steps of the method for determining whether a top drive can achieve automatic fastening and tightening (also referred to as "automatic fastening and tightening method") described in an embodiment of the present invention are described.

[0028] Before the step S110 is implemented, the automatic fastening and tightening method according to the embodiment of the present invention further includes: step S100 (not shown), automatically completing the fastening operation at the bottom of the pipe string to be lowered.

[0029] refer to Figure 2 In step S100, first, the top drive control device receives the (pipe string) bottom fastening instruction, and aligns the elevator with the wellhead center by detecting the change state of the lifting ring inclination, so that the current pipe string is supported by the drilling floor manipulator to position it to the wellhead center, and the drilling platform control system lowers the traveling block; then, the top drive control device receives and detects the elevator load signal, and after the elevator load signal disappears, generates a first control instruction for controlling the drilling platform control system to lower the traveling block according to a preset first lowering height, and enables the drilling platform control system to lower the traveling block to the specified first lowering height under the action of the first control instruction, thereby completing the bottom pipe string fastening task; finally, the top drive control device feeds back the bottom pipe string fastening completion signal to the drilling platform control system.

[0030] In one embodiment, the embodiment of the present invention detects the inclination of the lifting ring in real time by means of an inclination sensor (angle sensor) arranged at the lifting point.

[0031] Specifically, the top drive receives a pipe to be lowered from the manipulator of the second-level platform pipe arrangement device, and the drilling platform control system sends a pipe bottom fastening command to the top drive control device according to the actual working conditions. After receiving the bottom fastening command, the top drive control device detects the real-time change state of the lifting ring inclination angle and controls the lifting ring inclination angle to ensure that the lifting card is aligned with the center of the wellhead (to ensure that the pipe string coupling can enter the top drive bell mouth), and then, when the lifting ring runs to a vertical state, the drilling floor manipulator supports the current pipe to be lowered and accurately positions the pipe to the center of the wellhead, and then the drilling platform control system lowers the traveling block.

[0032] The load signal sensor (switching value) installed at the elevating bowl is used to collect the signal indicating whether the elevating bowl is bearing the load of the drill string (i.e., the load signal). The top drive control device receives and detects the load signal of the elevating bowl in real time. When the top drive control device detects that the load signal of the elevating bowl is set to 0, it indicates that the load signal of the elevating bowl has disappeared, and it is determined that the bottom thread coupling is successful. The top drive control device will control the drilling platform control system to stop lowering the traveling block when the traveling block is lowered to the first lowering height. At this time, the coupling task between the bottom of the drill string and the drilling platform is completed, thus leaving space for the top drive of the bottom rig to make up the thread. At this time, the iron roughneck goes to the wellhead to make up the thread at the bottom of the drill string. After that, the top drive control device will feedback the signal indicating that the bottom drill string has been made up with the thread to the drilling platform control system.

[0033] In addition, during the process of lowering the traveling block from the start to the first lowering height, the top drive control device detects that the load signal of the elevating bowl received in real time has not disappeared. At this time, the coupling between the bottom of the drill string and the drilling platform is not successful, and the current detection process is ended (i.e., the automatic detection program is stopped and switched to manual operation).

[0034] After making up the thread, the top drive control device will send a signal indicating that the bottom of the drill string has been coupled to the drilling platform control system.

[0035] In one embodiment, after receiving the signal indicating that the bottom of the drill string has been coupled, the drilling platform control system issues a (drill string) top coupling instruction and feeds back the top coupling instruction to the top drive control device.

[0036] After completing the bottom coupling and thread - making operation of the drill string, it enters step S110.

[0037] Step S110: Receive the (drill string) top coupling instruction, and the drilling platform control system lowers the traveling block carrying the drill string to start the automatic thread - spinning mode when it detects that it has been lowered to a preset position (for example: near the bell - mouth).

[0038] In step S110, after completing the bottom coupling of the drill string, the top drive control device will receive the top coupling instruction sent by the drilling platform control system; then, generate a second control instruction for controlling the drilling platform control system to continue lowering the traveling block according to the preset second lowering height, and make the drilling platform control system lower the traveling block to the top drive bell - mouth under the action of the second control instruction to start the automatic thread - spinning mode.

[0039] In one embodiment, the second lowering height represents the distance between the elevating bowl and the top drive bell - mouth, and is calculated based on information such as the current drill string length and the length of the elevator links provided by the drill string management system.

[0040] Specifically, as Figure 2As shown, after the bottom drill string is made up, the drilling rig control system issues an instruction for mating at the top of the pipe string. The drilling rig control system starts to lower the traveling block. Based on the second control instruction generated according to the second lowering height calculated by the top drive control device, under the action of the second control instruction, the drilling rig control system will continue to lower the current pipe string by a set height (the second lowering height), so that when the current pipe string is lowered to near the top drive bell mouth, the top drive control device is set to turn on the automatic make-up mode, and thus enters step S120. After the automatic make-up mode is started, the drilling rig control system will slow down the lowering speed.

[0041] Step S120 (by the top drive control device) obtains the real-time top drive torque data, and based on the real-time top drive torque data, combines the position indication signal indicating that the pipe string enters the top drive back-up tong bell mouth and the displacement data of the top drive balance cylinder to determine whether the current top drive protection joint and the pipe string joint are successfully mated.

[0042] In addition, when the automatic make-up mode is turned on, step S120 also includes: opening the pressure control valve for the top drive balance cylinder, so that the upward pulling force received by the top drive balance cylinder is slightly less than the gravity of the top drive itself, so as to protect the thread compression situation during the automatic make-up process; then, sending an instruction to the drilling rig control system to continue lowering the traveling block.

[0043] In one embodiment, when the automatic make-up mode is turned on, at this time, the top drive starts to make up the thread with a set torque, and the top drive control device will open the secondary pressure reducing valve for reducing the pressure of the top drive balance cylinder to ensure that the upward pulling force is slightly less than the gravity of the top drive body.

[0044] After reducing the pressure of the top drive balance cylinder, the pressure received by the top drive during thread making is maintained within a certain range (not too large and not too small). At this time, the top drive control device will send an instruction to the drilling rig control system to continue lowering the traveling block, so as to continue lowering the traveling block after starting the thread making mode and reducing the pressure of the cylinder to detect whether the top of the pipe string is successfully docked with the top drive protection joint.

[0045] In step S120, the top drive control device judges whether the pipe string enters the top drive back-up tong bell mouth by detecting the triggering state of the above position indication signal in real time; and after the pipe string enters the top drive back-up tong bell mouth, the top drive control device will detect whether the top drive torque reaches the mating position according to the real-time top drive torque data and the preset thread making torque threshold, and detect whether the traveling block reaches the target position according to the displacement data and the preset displacement threshold, so as to determine that the current top drive protection joint and the pipe string joint are successfully mated when the top drive torque reaches the mating position and the traveling block reaches the target position (for example: the thread making end position).

[0046] In one embodiment, when the above position indication signal is not triggered, it is determined that the current pipe string being lowered enters the top drive back-up tong bell mouth. Additionally, after the above position indication signal is triggered, it is determined that the current pipe string being lowered does not enter the top drive back-up tong bell mouth.

[0047] In one embodiment, when the top drive real-time torque data reaches or exceeds the preset make-up torque threshold, it is determined that the current top drive torque reaches the make-up position. Additionally, when the top drive real-time torque data does not reach the preset make-up torque threshold, it is determined that the current top drive torque does not reach the make-up position.

[0048] In one embodiment, when the top drive balance cylinder displacement data reaches or exceeds the preset displacement threshold, it is determined that the top drive cylinder signal is triggered and it is indicated that the current traveling block reaches the target position. Additionally, when the top drive balance cylinder displacement data does not reach the preset displacement threshold, it is determined that the top drive cylinder signal is not triggered and it is indicated that the current traveling block does not reach the target position.

[0049] Finally, when it is determined that the top drive torque reaches the make-up position and the traveling block reaches the target position, it is determined that the current top drive protection joint and the pipe string top joint are successfully made up. Additionally, when it is determined that the top drive torque does not reach the make-up position and / or the traveling block does not reach the target position, it is determined that the current top drive protection joint and the pipe string top joint are not successfully made up. At this time, the current detection process is ended (i.e., the automatic detection program is stopped and switched to manual operation).

[0050] In the embodiment of the present invention, a proximity switch installed on the torque reaction frame of the top drive back-up tong is used to detect whether the pipe string enters the top drive back-up tong bell mouth. Meanwhile, a displacement sensor installed inside the top drive balance cylinder is used to detect the displacement data of the top drive balance cylinder.

[0051] It is realized by adding a proximity switch. During make-up, when lowering the top drive to dock with the pipe string, if the drill string is not introduced into the top drive back-up tong bell mouth, the tong body will move upward. After the movement, it is judged by the proximity switch. When there is a signal from the proximity switch, it indicates that the drill string is not introduced into the back-up tong. When there is no signal from the current proximity switch, it indicates that the drill string is introduced into the back-up tong. Meanwhile, the make-up action and the lowering of the top drive are carried out. The top drive judges that the make-up is completed when the make-up torque reaches the specified value and outputs a signal.

[0052] Then, after the make-up is successful, the top drive control device will also send an instruction to stop lowering the traveling block to the drilling platform control system and notify the drilling platform control system that the current top drive protection joint and the pipe string top joint are successfully made up. Then, the drilling platform control system will feedback a make-up tightness instruction to the top drive control device.

[0053] After determining whether the current top drive protection joint and the pipe string joint are successfully made up, it proceeds to step S130.

[0054] In step S130, after successful butt-joint, the top drive control device receives the tightening command, and diagnoses the in-place state of the top drive knob by detecting the clamping state of the top drive back-up tongs and the real-time torque data of the top drive.

[0055] In step S130, the top drive control device obtains the real-time pressure data of the top drive back-up tongs in real time, and judges whether the butt-joint action reaches the clamping state according to the real-time obtained pressure data of the top drive back-up tongs; then, when the clamping state is reached, the top drive control device also detects whether the top drive and the top of the pipe string are tightly fastened according to the real-time torque data of the top drive and the preset tightening torque threshold.

[0056] In one embodiment, the top drive control device judges whether the current top butt-joint action reaches the clamping state according to the pressure data of the top drive back-up tongs and the preset back-up tongs pressure threshold. Among them, when it is detected that the pressure data of the top drive back-up tongs reaches or exceeds the preset back-up tongs pressure threshold, it is determined that the current top butt-joint action reaches the clamping state. When it is detected that the pressure data of the top drive back-up tongs does not reach the preset back-up tongs pressure threshold, it is determined that the current top butt-joint action does not reach the clamping state.

[0057] In the embodiment of the present invention, the pressure sensor arranged at the rodless cavity oil port of the top drive back-up tongs enables the top drive control device to obtain the real-time pressure data of the top drive back-up tongs in real time.

[0058] In one embodiment, when the current top butt-joint action reaches the clamping state, when the top drive control device detects that the real-time torque data of the top drive reaches or exceeds the preset tightening torque threshold, it is determined that the current top drive and the top of the pipe string reach the tightly fastened state (that is, the top drive knob is in place). In addition, when the current top butt-joint action reaches the clamping state, if the top drive control device detects that the real-time torque data of the top drive does not reach the preset tightening torque threshold, the current top drive and the top of the pipe string do not reach the tightly fastened state (that is, the top drive knob is not in place).

[0059] The drilling platform control system issues a tightening command, and the top drive control device evaluates the clamping state of the back-up tongs (a pressure sensor is installed on the back-up tongs). When the pressure of the back-up tongs reaches the set value, it is determined that the clamping is successful; the top drive control device starts to detect according to the set tightening torque value. When the real-time torque value reaches the set tightening torque, it indicates that the top drive knob is in place, and the whole process is automatically completed.

[0060] On the other hand, based on the above automatic butt-joint and tightening method, the embodiment of the present invention also provides a system for determining the automatic butt-joint and tightening of the top drive (also called "automatic butt-joint and tightening system"). This automatic butt-joint and tightening system is used to implement the automatic butt-joint and tightening method as described above.

[0061] Figure 3 It is a schematic structural diagram of the system for determining the automatic butt-joint and tightening of the top drive in the embodiment of the present application. AsFigure 3 As shown in Figure 3 , the automatic buckling and fastening system according to the embodiment of the present invention includes an information detection component 31 and a top drive control device 32.

[0062] The information detection component 31 is used to collect in real time information such as the real-time torque data of the top drive, the position indication signal indicating that the pipe string enters the bell mouth of the back-up tong of the top drive, the displacement data of the balance cylinder of the top drive, and the clamping state of the back-up tong of the top drive. In one embodiment, the information detection component 31 includes, but is not limited to, an inclination sensor provided on the elevating bail, a pressure sensor and a proximity switch provided on the back-up tong, a load signal sensor provided on the elevator, and a displacement sensor provided in the balance cylinder of the top drive.

[0063] The top drive control device 32 is used to receive the top buckling instruction and lower the traveling block carrying the pipe string by the drilling platform control system. When it is detected that the traveling block is lowered to a preset position, the automatic spinning mode is started. After that, the real-time torque data of the top drive is obtained, and based on this, combined with the position indication signal indicating that the pipe string enters the bell mouth of the back-up tong of the top drive and the displacement data of the balance cylinder of the top drive, it is judged whether the current top drive protection joint and the pipe string joint are buckled successfully. And after the buckling is successful, receive the fastening instruction, and diagnose the in-place state of the top drive knob by detecting the clamping state of the back-up tong of the top drive and the real-time torque data of the top drive.

[0064] The present invention discloses a method and a system for determining the automatic buckling and fastening of a top drive. The method and the system are achieved by installing sensors such as an inclination sensor on the elevating bail, a pressure sensor on the back-up tong, and a proximity switch on the back-up tong on the top drive, installing a load signal sensor on the elevator, and installing a displacement sensor in the balance cylinder of the top drive. Among them, a pressure sensor is added to the outlet of the rodless cavity of the valve group back-up tong to detect the pressure in the rodless cavity of the back-up tong and judge whether the back-up tong is clamped; the top drive adds a balance cylinder detection (pressure or stroke) or other better methods to judge whether the buckling and spinning are successful; the angle sensor is fixed on the elevating bail to realize the feedback of the inclination angle of the elevating bail. The present invention starts to calculate the lowering height after the traveling block is lowered and the load signal of the elevator is lost, and the top drive starts the spinning mode. If the spinning torque is not reached or the proximity switch signal of the back-up tong is triggered, it is determined that the buckling fails; if the spinning torque is reached and the balance cylinder sensor has a signal, it is determined that the spinning is successful. After the spinning is successful, the back-up tong is clamped, and after the clamping has a feedback, the threading starts. When the set torque is reached, the whole operation is completed. In this way, the present invention effectively realizes the automatic control of the buckling and spinning operations of the pipe string by installing information collection components at designated positions on the existing land drilling platform and designing corresponding detection and judgment logics, effectively improves the operation efficiency, and reduces the workload of ground staff.

[0065] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

[0066] In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention 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 thus cannot be construed as a limitation of the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0067] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected to" 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 directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] It should be understood that the embodiments disclosed by the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should extend to equivalent alternatives of these features understood by those of ordinary skill in the relevant art. It should also be understood that the terms used herein are only for the purpose of describing specific embodiments and do not mean to limit.

[0069] The "one embodiment" or "embodiment" mentioned in the specification means that the specific features, structures or characteristics described in connection with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" that appear throughout the specification do not necessarily all refer to the same embodiment.

[0070] Although the embodiments disclosed by the present invention are as above, the content described is only the embodiment adopted for the convenience of understanding the present invention and is not used to limit the present invention. Any person skilled in the art within the technical field to which the present invention pertains can make any modifications and changes in the form of implementation and details without departing from the spirit and scope disclosed by the present invention. However, the patent protection scope of the present invention shall still be subject to the scope defined by the appended claims.

Claims

1. A method for determining the automatic coupling and tightening of a top drive, characterized in that, Including: Step 1: Receive the top coupling instruction and lower the traveling block carrying the pipe string by the drilling rig control system. When it is detected that the traveling block is lowered to a preset position, the automatic screwing mode is activated. Step 2: Obtain the real-time torque data of the top drive. Based on this, in combination with the position indication signal indicating that the pipe string enters the bell mouth of the top drive back-up tong and the displacement data of the top drive balance cylinder, determine whether the current top drive protection joint and the pipe string joint are successfully coupled. Step 3: After successful coupling, receive the tightening instruction, and diagnose the in-place state of the top drive knob by detecting the clamping state of the top drive back-up tong and the real-time torque data of the top drive.

2. The method according to claim 1, characterized in that, The said Step 2 includes: Judge whether the pipe string enters the bell mouth of the top drive back-up tong by detecting the triggering state of the position indication signal in real time. After entering, detect whether the top drive torque reaches the coupling position according to the real-time torque data of the top drive and the preset screwing torque threshold, and detect whether the traveling block reaches the target position according to the displacement data and the preset displacement threshold. Thus, when the top drive torque reaches the coupling position and the traveling block reaches the target position, it is determined that the current top drive protection joint and the pipe string joint are successfully coupled.

3. The method according to claim 2, characterized in that, When the position indication signal is not triggered, it is determined that the currently lowered pipe string enters the bell mouth of the top drive back-up tong; otherwise, it is determined that the currently lowered pipe string does not enter the bell mouth of the top drive back-up tong.

4. The method according to claim 2 or 3, characterized in that, Detect whether the pipe string enters the bell mouth of the top drive back-up tong through a proximity switch installed on the anti-torque frame of the top drive back-up tong. Detect the displacement data through a displacement sensor installed in the top drive balance cylinder.

5. The method according to any one of claims 2 to 4, characterized in that, When the automatic screwing mode is activated, the said Step 2 further includes: Open the pressure control valve for the top drive balance cylinder, so that the upward pulling force received by the top drive balance cylinder is less than the gravity of the top drive itself. Send an instruction to the drilling rig control system to continue lowering the traveling block.

6. The method according to any one of claims 1 to 5, characterized in that, The said method further includes: Receive the bottom coupling instruction, make the elevating bail align with the wellhead center by detecting the change state of the elevating bail inclination angle, so that the current pipe string is supported by the drill floor manipulator and positioned at the wellhead center, and then the drilling rig control system lowers the traveling block. Receive and detect the elevating bail load signal. After the elevating bail load signal disappears, generate a first control instruction for controlling the drilling rig control system to lower the traveling block according to the preset first lowering height, and make the drilling rig control system lower the traveling block by the first lowering height under the action of the first control instruction, so as to complete the bottom pipe string coupling task. Feed back the signal indicating that the top coupling of the pipe string is completed.

7. The method according to claim 6, characterized in that, The said Step 1 includes: After completing the bottom pipe string coupling and obtaining the top coupling instruction, generate a second control instruction for controlling the drilling rig control system to continue lowering the traveling block according to the preset second lowering height, and make the drilling rig control system lower the traveling block to the bell mouth of the top drive under the action of the second control instruction to activate the automatic screwing mode.

8. The method according to any one of claims 1 to 7, characterized in that, The said Step 3 includes: Obtain the real-time pressure data of the top drive back-up tong in real time, and based on this, judge whether the screwing action reaches the clamping state. When reaching the clamping state, detect whether the top drive and the top of the pipe string are tightly fastened according to the real-time torque data of the top drive and the preset tightening torque threshold, where When the real-time torque data of the top drive reaches or exceeds the preset make-up torque threshold value, it is determined that the current top drive and the top of the pipe string reach the make-up state.

9. The method according to claim 8, characterized in that, According to the back-up tong pressure data of the top drive and the preset back-up tong pressure threshold value, it is judged whether the current threading operation reaches the clamping state. Among them, when the back-up tong pressure data of the top drive reaches or exceeds the preset back-up tong pressure threshold value, it is determined that the clamping state is reached; otherwise, the clamping state is not reached. Among them, The back-up tong pressure data of the top drive is obtained by a pressure sensor arranged at the rodless cavity oil port of the back-up tong of the top drive.

10. A system for determining the automatic coupling and tightening of a top drive, characterized in that, The system is used to implement the method described in any one of claims 1 to 9, wherein the system includes: An information detection component, which is used to collect in real time the real-time torque data of the top drive, the position indication signal indicating that the pipe string enters the bell mouth of the back-up tong of the top drive, the displacement data of the balance cylinder of the top drive, and the clamping state of the back-up tong of the top drive; A top drive control device, which is used to receive the top threading instruction and lower the traveling block carrying the pipe string by the drilling platform control system, so as to start the automatic make-up mode when it is detected that it is lowered to the preset position. After that, the real-time torque data of the top drive is obtained, and based on this, combined with the position indication signal indicating that the pipe string enters the bell mouth of the back-up tong of the top drive and the displacement data of the balance cylinder of the top drive, it is judged whether the current protection joint of the top drive and the pipe joint are successfully threaded. And, after the threading is successful, receive the make-up instruction, and diagnose the in-place state of the top drive knob by detecting the clamping state of the back-up tong of the top drive and the real-time torque data of the top drive.

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