Control method and system for a downhole unjamming device

Abstract

The application relates to the technical field of downhole unjamming, and discloses a control method and system for a downhole unjamming device, which receives an unjamming command sent by a control end, and obtains internal pressure of the downhole unjamming device and environmental pressure of the downhole unjamming device according to the unjamming command; whether the downhole unjamming device satisfies unjamming conditions is judged based on the internal pressure and the environmental pressure; when the downhole unjamming device satisfies the unjamming conditions, unjamming factors of the downhole unjamming device are collected; unjamming control instructions of the downhole unjamming device are set according to the unjamming factors, and the downhole unjamming device is controlled according to the unjamming control instructions; the application can intelligently control the downhole unjamming device, effectively reduces operation errors caused by manual participation, timely resolves wellbore risks, avoids causing larger safety accidents, saves working costs, and improves working efficiency.

Description

Technical Field

[0001] This invention relates to the field of downhole unblocking technology, and in particular to a control method and system for a downhole unblocking device. Background Technology

[0002] With rapid economic development, the demand for oil and gas resources has increased dramatically, leading to a surge in oil resource extraction. This has resulted in a growing number of open-hole wells in highly deviated oil and gas fields. In oil logging operations, the limited annular space in small wells restricts tool size. Furthermore, factors such as complex geological structures, wellbore collapse, wellbore diameter reduction, mud viscosity, and operator error frequently cause accidents like logging equipment and cable sticking. To address this urgent need, a downhole unsticking device has been developed for timely and effective unsticking.

[0003] The current method of controlling downhole release devices relies on the experience of the operators. However, with the continuous increase in the lateral extension length of extended reach wells and horizontal wells, downhole conditions are becoming more complex, unpredictable, and difficult to control. Traditional control methods for downhole release devices can no longer meet the work requirements, are prone to control errors, and cause many operational hazards and safety risks.

[0004] Therefore, how to provide a method and system for intelligent control of downhole unblocking devices is a technical problem that needs to be solved. Summary of the Invention

[0005] This invention provides a control method and system for a downhole unblocking device, which solves the technical problems in the prior art that the downhole unblocking device cannot be intelligently controlled, control errors cannot be eliminated, and wellbore risks cannot be mitigated in a timely manner, thus leading to a larger safety accident.

[0006] To achieve the above objectives, the present invention provides a control method for a downhole unblocking device, comprising:

[0007] Receive the card release command sent by the control terminal, and obtain the internal pressure of the downhole card release device and the environmental pressure of the downhole card release device according to the card release command;

[0008] Based on the internal pressure and the environmental pressure, determine whether the downhole unblocking device meets the unblocking conditions;

[0009] When the downhole unblocking device meets the unblocking conditions, the unblocking factors of the downhole unblocking device are collected.

[0010] The unblocking control command of the downhole unblocking device is set according to the unblocking factors, and the downhole unblocking device is controlled according to the unblocking control command.

[0011] Furthermore, before obtaining the internal pressure of the downhole unblocking device and the ambient pressure of the downhole unblocking device according to the unblocking command, the method further includes:

[0012] Obtain the previous command and determine the command category of the previous command;

[0013] The card unlocking command is matched with the command category of the previous command, and it is determined whether the card unlocking command is the same as the previous command.

[0014] If the card unlocking command matches the command category of the previous command, then it is determined that the card unlocking command is the same as the previous command. The first time node of sending the card unlocking command is collected, and the second time node of sending the previous command is also collected. The time node difference between the first time node and the second time node is calculated. Based on the relationship between the time node difference and a preset time node difference, it is determined whether the card unlocking command meets the processing requirements.

[0015] If the time node difference is greater than or equal to the preset time node difference, it is determined that the unblocking command meets the processing requirements, and the internal pressure of the downhole unblocking device and the environmental pressure of the downhole unblocking device are obtained according to the unblocking command.

[0016] If the time node difference is less than the preset time node difference, it is determined that the card unlocking command does not meet the processing requirements, and a log reminder is generated and sent.

[0017] If the release command does not match the command category of the previous command, it is determined that the release command is different from the previous command, and the internal pressure of the downhole release device and the environmental pressure of the downhole release device are obtained according to the release command.

[0018] Furthermore, when determining whether the downhole unsticking device meets the unsticking conditions based on the internal pressure and the ambient pressure, the following steps are included:

[0019] Calculate the pressure difference between the internal pressure and the ambient pressure;

[0020] The determination of whether the downhole unsticking device meets the unsticking conditions is based on the relationship between the pressure difference value and the preset pressure difference value.

[0021] When the pressure difference is less than the preset pressure difference, it is determined that the downhole release device meets the release conditions.

[0022] When the pressure difference is greater than or equal to the preset pressure difference, it is determined that the downhole unblocking device does not meet the unblocking conditions, and the pressure of the downhole unblocking device is adjusted based on the balance joint of the downhole unblocking device.

[0023] Furthermore, the factors for unblocking include the unblocking depth A of the downhole unblocking device and the formation pressure E where the downhole unblocking device is located.

[0024] Furthermore, when setting the unsticking control command for the downhole unsticking device based on the unsticking factors, it includes:

[0025] The hydraulic oil pressurization pressure of the downhole unblocking device is set according to the unblocking depth A of the downhole unblocking device;

[0026] The hydraulic oil pressurization pressure of the downhole unblocking device is corrected based on the formation pressure E at which the downhole unblocking device is located, to obtain the target hydraulic oil pressurization pressure of the downhole unblocking device.

[0027] Furthermore, when setting the hydraulic oil pressurization pressure of the downhole unsticking device according to the unsticking depth A of the downhole unsticking device, the following is included:

[0028] The first preset card unlocking depth B1, the second preset card unlocking depth B2, the third preset card unlocking depth B3, and the fourth preset card unlocking depth B4 are preset, and B1 < B2 < B3 < B4.

[0029] The first preset hydraulic oil pressure C1, the second preset hydraulic oil pressure C2, the third preset hydraulic oil pressure C3, the fourth preset hydraulic oil pressure C4, and the fifth preset hydraulic oil pressure C5 are preset, and C1 < C2 < C3 < C4 < C5.

[0030] The hydraulic oil pressurization pressure of the downhole unsticking device is set according to the relationship between the unsticking depth A of the downhole unsticking device and each preset unsticking depth:

[0031] When A < B1, the first preset hydraulic oil pressure C1 is selected as the hydraulic oil pressure of the downhole unblocking device;

[0032] When B1≤A<B2, the second preset hydraulic oil pressure C2 is selected as the hydraulic oil pressure of the downhole unblocking device;

[0033] When B2≤A<B3, the third preset hydraulic oil pressure C3 is selected as the hydraulic oil pressure of the downhole unblocking device;

[0034] When B3≤A<B4, the fourth preset hydraulic oil pressure C4 is selected as the hydraulic oil pressure of the downhole unblocking device;

[0035] When B4≤A, the fifth preset hydraulic oil pressure C5 is selected as the hydraulic oil pressure of the downhole unblocking device.

[0036] Furthermore, when correcting the hydraulic oil pressurization pressure of the downhole unsticking device based on the formation pressure E at which the downhole unsticking device is located, to obtain the target hydraulic oil pressurization pressure of the downhole unsticking device, the following steps are included:

[0037] A first preset formation pressure G1, a second preset formation pressure G2, a third preset formation pressure G3, and a fourth preset formation pressure G4 are preset, and G1 < G2 < G3 < G4.

[0038] The first preset hydraulic oil pressure correction coefficient h1, the second preset hydraulic oil pressure correction coefficient h2, the third preset hydraulic oil pressure correction coefficient h3, the fourth preset hydraulic oil pressure correction coefficient h4, and the fifth preset hydraulic oil pressure correction coefficient h5 are preset, and 0.8 < h1 < h2 < h3 < h4 < h5 < 1.2.

[0039] When the hydraulic oil pressurization pressure of the downhole unblocking device is set to the i-th preset hydraulic oil pressurization pressure Ci, where i = 1, 2, 3, 4, 5, the i-th preset hydraulic oil pressurization pressure Ci is corrected according to the relationship between the formation pressure E where the downhole unblocking device is located and each preset formation pressure:

[0040] When E < G1, the first preset hydraulic oil pressure correction coefficient h1 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h1 of the downhole unblocking device.

[0041] When G1≤E<G2, the second preset hydraulic oil pressure correction coefficient h2 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h2 of the downhole unblocking device.

[0042] When G2≤E<G3, the third preset hydraulic oil pressure correction coefficient h3 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h3 of the downhole unblocking device.

[0043] When G3≤E<G4, the fourth preset hydraulic oil pressure correction coefficient h4 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h4 of the downhole unblocking device.

[0044] When G4≤E, the fifth preset hydraulic oil pressure correction coefficient h5 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h5 of the downhole unblocking device.

[0045] To achieve the above objectives, the present invention provides a control system for a downhole unblocking device, comprising:

[0046] The acquisition module is used to receive the card release command sent by the control terminal, and to acquire the internal pressure of the downhole card release device and the environmental pressure of the downhole card release device according to the card release command;

[0047] The judgment module is used to determine whether the downhole unblocking device meets the unblocking conditions based on the internal pressure and the ambient pressure.

[0048] The data acquisition module is used to acquire the factors related to the release of the downhole unblocking device when the release conditions are met.

[0049] The setting module is used to set the unblocking control command of the downhole unblocking device according to the unblocking factors, and to control the downhole unblocking device according to the unblocking control command.

[0050] Furthermore, it also includes:

[0051] The determination module is used to obtain the previous command and determine the command category of the previous command;

[0052] The matching module is used to match the card unlocking command with the command category of the previous command, and to determine whether the card unlocking command is the same as the previous command.

[0053] If the card unlocking command matches the command category of the previous command, then it is determined that the card unlocking command is the same as the previous command. The first time node of sending the card unlocking command is collected, and the second time node of sending the previous command is also collected. The time node difference between the first time node and the second time node is calculated. Based on the relationship between the time node difference and a preset time node difference, it is determined whether the card unlocking command meets the processing requirements.

[0054] If the time node difference is greater than or equal to the preset time node difference, it is determined that the unblocking command meets the processing requirements, and the internal pressure of the downhole unblocking device and the environmental pressure of the downhole unblocking device are obtained according to the unblocking command.

[0055] If the time node difference is less than the preset time node difference, it is determined that the card unlocking command does not meet the processing requirements, and a log reminder is generated and sent.

[0056] If the release command does not match the command category of the previous command, it is determined that the release command is different from the previous command, and the internal pressure of the downhole release device and the environmental pressure of the downhole release device are obtained according to the release command.

[0057] This invention provides a control method and system for a downhole unblocking device, which has the following advantages compared to the prior art:

[0058] This invention discloses a control method and system for a downhole unblocking device. The method receives an unblocking command from a control terminal and acquires the internal pressure and environmental pressure of the downhole unblocking device based on the command. It then determines whether the device meets the unblocking conditions based on these pressures. When the unblocking conditions are met, it collects unblocking factors. Based on these factors, it sets unblocking control instructions and controls the device accordingly. This invention enables intelligent control of the downhole unblocking device, effectively reducing operational errors caused by manual intervention, promptly mitigating wellbore risks, preventing larger safety accidents, saving significant operating costs, and improving work efficiency. Attached Figure Description

[0059] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0060] Figure 1 A flowchart illustrating a control method for a downhole unblocking device according to an embodiment of the present invention is shown;

[0061] Figure 2 A schematic diagram of the structure of a control system for a downhole unblocking device according to an embodiment of the present invention is shown. Detailed Implementation

[0062] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0063] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0064] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

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

[0066] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0067] like Figure 1 As shown, an embodiment of the present invention discloses a control method for a downhole unblocking device, comprising:

[0068] S110: Receives the card release command sent by the control terminal, and obtains the internal pressure of the downhole card release device and the environmental pressure of the downhole card release device according to the card release command.

[0069] In this embodiment, the unsticking command refers to the command issued by the operator on the control terminal when a stuck drill bit accident occurs in the well.

[0070] In some embodiments of this application, before obtaining the internal pressure of the downhole unblocking device and the ambient pressure of the downhole unblocking device according to the unblocking command, the method further includes:

[0071] Obtain the previous command and determine the command category of the previous command;

[0072] The card unlocking command is matched with the command category of the previous command, and it is determined whether the card unlocking command is the same as the previous command.

[0073] If the card unlocking command matches the command category of the previous command, then it is determined that the card unlocking command is the same as the previous command. The first time point at which the card unlocking command was sent is collected, and the second time point at which the previous command was sent is also collected. The time point difference between the first and second time points is calculated, and based on the relationship between the time point difference and a preset time point difference, it is determined whether the card unlocking command meets the processing requirements.

[0074] If the time node difference is greater than or equal to the preset time node difference, it is determined that the unblocking command meets the processing requirements, and the internal pressure of the downhole unblocking device and the environmental pressure of the downhole unblocking device are obtained according to the unblocking command.

[0075] If the time node difference is less than the preset time node difference, it is determined that the card unlocking command does not meet the processing requirements, and a log reminder is generated and sent.

[0076] If the release command does not match the command category of the previous command, it is determined that the release command is different from the previous command, and the internal pressure of the downhole release device and the environmental pressure of the downhole release device are obtained according to the release command.

[0077] In this embodiment, the previous command may not be an unlock command, but may be a drilling, logging, or well logging command.

[0078] In this embodiment, the preset time node difference can be set according to the actual situation, such as 5 minutes or 10 minutes.

[0079] In this embodiment, if the time difference is less than the preset time difference, it may be that the staff sent the card unlocking command incorrectly. Therefore, a log reminder is generated.

[0080] The beneficial effects of the above technical solution are: the present invention matches the card unlocking command with the command category of the previous command and determines whether the card unlocking command is the same as the previous command, which can ensure the normal progress of the card unlocking work and avoid the phenomenon of repeated card unlocking.

[0081] S120: Determine whether the downhole unblocking device meets the unblocking conditions based on the internal pressure and the ambient pressure.

[0082] In some embodiments of this application, determining whether the downhole unsticking device meets the unsticking conditions based on the internal pressure and the ambient pressure includes:

[0083] Calculate the pressure difference between the internal pressure and the ambient pressure;

[0084] The determination of whether the downhole unsticking device meets the unsticking conditions is based on the relationship between the pressure difference value and the preset pressure difference value.

[0085] When the pressure difference is less than the preset pressure difference, it is determined that the downhole release device meets the release conditions.

[0086] When the pressure difference is greater than or equal to the preset pressure difference, it is determined that the downhole unblocking device does not meet the unblocking conditions, and the pressure of the downhole unblocking device is adjusted based on the balance joint of the downhole unblocking device.

[0087] In this embodiment, the pressure of the downhole unblocking device is regulated based on the balance joint of the downhole unblocking device. Specifically, the piston in the balance joint balances the pressure difference between the environment and the internal pressure.

[0088] The beneficial effects of the above technical solution are: the present invention determines whether the downhole unblocking device meets the unblocking conditions based on the relationship between the pressure difference and the preset pressure difference, thereby achieving a good sealing effect and providing a reliable operating premise for the unblocking operation.

[0089] S130: When the downhole unblocking device meets the unblocking conditions, collect the unblocking factors of the downhole unblocking device.

[0090] In some embodiments of this application, the unblocking factors include the unblocking depth A of the downhole unblocking device and the formation pressure E where the downhole unblocking device is located.

[0091] S140: Set the unblocking control command for the downhole unblocking device according to the unblocking factors, and control the downhole unblocking device according to the unblocking control command.

[0092] In some embodiments of this application, when setting the unblocking control command of the downhole unblocking device according to the unblocking factors, the following are included:

[0093] The hydraulic oil pressurization pressure of the downhole unblocking device is set according to the unblocking depth A of the downhole unblocking device.

[0094] The hydraulic oil pressurization pressure of the downhole unblocking device is corrected according to the formation pressure E at which the downhole unblocking device is located, so as to obtain the target hydraulic oil pressurization pressure of the downhole unblocking device.

[0095] In some embodiments of this application, when setting the hydraulic oil pressurization pressure of the downhole unsticking device according to the unsticking depth A of the downhole unsticking device, the following is included:

[0096] The first preset card unlocking depth B1, the second preset card unlocking depth B2, the third preset card unlocking depth B3, and the fourth preset card unlocking depth B4 are preset, and B1 < B2 < B3 < B4.

[0097] The first preset hydraulic oil pressure C1, the second preset hydraulic oil pressure C2, the third preset hydraulic oil pressure C3, the fourth preset hydraulic oil pressure C4, and the fifth preset hydraulic oil pressure C5 are preset, and C1 < C2 < C3 < C4 < C5.

[0098] The hydraulic oil pressurization pressure of the downhole unsticking device is set according to the relationship between the unsticking depth A of the downhole unsticking device and each preset unsticking depth:

[0099] When A < B1, the first preset hydraulic oil pressure C1 is selected as the hydraulic oil pressure of the downhole unblocking device;

[0100] When B1≤A<B2, the second preset hydraulic oil pressure C2 is selected as the hydraulic oil pressure of the downhole unblocking device;

[0101] When B2≤A<B3, the third preset hydraulic oil pressure C3 is selected as the hydraulic oil pressure of the downhole unblocking device;

[0102] When B3≤A<B4, the fourth preset hydraulic oil pressure C4 is selected as the hydraulic oil pressure of the downhole unblocking device;

[0103] When B4≤A, the fifth preset hydraulic oil pressure C5 is selected as the hydraulic oil pressure of the downhole unblocking device.

[0104] The beneficial effects of the above technical solution are as follows: The present invention sets the hydraulic oil pressurization pressure of the downhole unsticking device according to the relationship between the unsticking depth A of the downhole unsticking device and each preset unsticking depth. By setting the hydraulic oil pressurization pressure of the downhole unsticking device, the unsticking efficiency can be improved, wellbore risks can be resolved in a timely manner, and the stable operation of downhole work can be ensured.

[0105] In some embodiments of this application, when correcting the hydraulic oil pressurization pressure of the downhole unsticking device based on the formation pressure E at which the downhole unsticking device is located, to obtain the target hydraulic oil pressurization pressure of the downhole unsticking device, the following steps are included:

[0106] A first preset formation pressure G1, a second preset formation pressure G2, a third preset formation pressure G3, and a fourth preset formation pressure G4 are preset, and G1 < G2 < G3 < G4.

[0107] The first preset hydraulic oil pressure correction coefficient h1, the second preset hydraulic oil pressure correction coefficient h2, the third preset hydraulic oil pressure correction coefficient h3, the fourth preset hydraulic oil pressure correction coefficient h4, and the fifth preset hydraulic oil pressure correction coefficient h5 are preset, and 0.8 < h1 < h2 < h3 < h4 < h5 < 1.2.

[0108] When the hydraulic oil pressurization pressure of the downhole unblocking device is set to the i-th preset hydraulic oil pressurization pressure Ci, where i = 1, 2, 3, 4, 5, the i-th preset hydraulic oil pressurization pressure Ci is corrected according to the relationship between the formation pressure E where the downhole unblocking device is located and each preset formation pressure:

[0109] When E < G1, the first preset hydraulic oil pressure correction coefficient h1 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h1 of the downhole unblocking device.

[0110] When G1≤E<G2, the second preset hydraulic oil pressure correction coefficient h2 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h2 of the downhole unblocking device.

[0111] When G2≤E<G3, the third preset hydraulic oil pressure correction coefficient h3 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h3 of the downhole unblocking device.

[0112] When G3≤E<G4, the fourth preset hydraulic oil pressure correction coefficient h4 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h4 of the downhole unblocking device.

[0113] When G4≤E, the fifth preset hydraulic oil pressure correction coefficient h5 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h5 of the downhole unblocking device.

[0114] The beneficial effects of the above technical solution are as follows: When the hydraulic oil pressurization pressure of the downhole unblocking device is set to the i-th preset hydraulic oil pressurization pressure Ci, i = 1, 2, 3, 4, 5, the i-th preset hydraulic oil pressurization pressure Ci is corrected according to the relationship between the formation pressure E where the downhole unblocking device is located and each preset formation pressure. By correcting the i-th preset hydraulic oil pressurization pressure Ci, the phenomenon of formation leakage, which makes the drill string stick tighter and increases the unblocking time, can be avoided.

[0115] To further illustrate the technical concept of this invention, the technical solution of this invention will now be described in conjunction with specific application scenarios.

[0116] Correspondingly, such as Figure 2 As shown, this application also provides a control system for a downhole unsticking device, comprising:

[0117] The acquisition module is used to receive the card release command sent by the control terminal, and to acquire the internal pressure of the downhole card release device and the environmental pressure of the downhole card release device according to the card release command;

[0118] The judgment module is used to determine whether the downhole unblocking device meets the unblocking conditions based on the internal pressure and the ambient pressure.

[0119] The data acquisition module is used to acquire the factors related to the release of the downhole unblocking device when the release conditions are met.

[0120] The setting module is used to set the unblocking control command of the downhole unblocking device according to the unblocking factors, and to control the downhole unblocking device according to the unblocking control command.

[0121] In some embodiments of this application, it also includes:

[0122] The determination module is used to obtain the previous command and determine the command category of the previous command;

[0123] The matching module is used to match the card unlocking command with the command category of the previous command, and to determine whether the card unlocking command is the same as the previous command.

[0124] If the card unlocking command matches the command category of the previous command, then it is determined that the card unlocking command is the same as the previous command. The first time node of sending the card unlocking command is collected, and the second time node of sending the previous command is also collected. The time node difference between the first time node and the second time node is calculated. Based on the relationship between the time node difference and a preset time node difference, it is determined whether the card unlocking command meets the processing requirements.

[0125] If the time node difference is greater than or equal to the preset time node difference, it is determined that the unblocking command meets the processing requirements, and the internal pressure of the downhole unblocking device and the environmental pressure of the downhole unblocking device are obtained according to the unblocking command.

[0126] If the time node difference is less than the preset time node difference, it is determined that the card unlocking command does not meet the processing requirements, and a log reminder is generated and sent.

[0127] If the release command does not match the command category of the previous command, it is determined that the release command is different from the previous command, and the internal pressure of the downhole release device and the environmental pressure of the downhole release device are obtained according to the release command.

[0128] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0129] Although the invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, features in the embodiments disclosed herein can be combined with each other in any manner, provided there is no structural conflict. The omission of all such combinations in this specification is merely for brevity and resource conservation. Therefore, the invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0130] It will be understood by those skilled in the art that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control method for a downhole unblocking device, characterized in that, include: Receive the card release command sent by the control terminal, and obtain the internal pressure of the downhole card release device and the environmental pressure of the downhole card release device according to the card release command; Based on the internal pressure and the environmental pressure, determine whether the downhole unblocking device meets the unblocking conditions; When the downhole unblocking device meets the unblocking conditions, the unblocking factors of the downhole unblocking device are collected. The unblocking control command of the downhole unblocking device is set according to the unblocking factors, and the downhole unblocking device is controlled according to the unblocking control command; The factors for unblocking include the unblocking depth A of the downhole unblocking device and the formation pressure E where the downhole unblocking device is located; When setting the unsticking control command of the downhole unsticking device according to the unsticking factors, it includes: The hydraulic oil pressurization pressure of the downhole unblocking device is set according to the unblocking depth A of the downhole unblocking device; The hydraulic oil pressurization pressure of the downhole unblocking device is corrected according to the formation pressure E at which the downhole unblocking device is located, so as to obtain the target hydraulic oil pressurization pressure of the downhole unblocking device. When setting the hydraulic oil pressurization pressure of the downhole unsticking device according to the unsticking depth A of the downhole unsticking device, the following is included: The first preset card unlocking depth B1, the second preset card unlocking depth B2, the third preset card unlocking depth B3, and the fourth preset card unlocking depth B4 are preset, and B1 < B2 < B3 < B4. The first preset hydraulic oil pressure C1, the second preset hydraulic oil pressure C2, the third preset hydraulic oil pressure C3, the fourth preset hydraulic oil pressure C4, and the fifth preset hydraulic oil pressure C5 are preset, and C1 < C2 < C3 < C4 < C5. The hydraulic oil pressurization pressure of the downhole unsticking device is set according to the relationship between the unsticking depth A of the downhole unsticking device and each preset unsticking depth: When A < B1, the first preset hydraulic oil pressure C1 is selected as the hydraulic oil pressure of the downhole unblocking device; When B1≤A<B2, the second preset hydraulic oil pressure C2 is selected as the hydraulic oil pressure of the downhole unblocking device; When B2≤A<B3, the third preset hydraulic oil pressure C3 is selected as the hydraulic oil pressure of the downhole unblocking device; When B3≤A<B4, the fourth preset hydraulic oil pressure C4 is selected as the hydraulic oil pressure of the downhole unblocking device; When B4≤A, the fifth preset hydraulic oil pressure C5 is selected as the hydraulic oil pressure of the downhole unblocking device.

2. The control method for the downhole unblocking device according to claim 1, characterized in that, Before obtaining the internal pressure of the downhole release device and the ambient pressure of the downhole release device according to the release command, the process also includes: Obtain the previous command and determine the command category of the previous command; The card unlocking command is matched with the command category of the previous command, and it is determined whether the card unlocking command is the same as the previous command. If the card unlocking command matches the command category of the previous command, then it is determined that the card unlocking command is the same as the previous command. The first time node of sending the card unlocking command is collected, and the second time node of sending the previous command is also collected. The time node difference between the first time node and the second time node is calculated. Based on the relationship between the time node difference and a preset time node difference, it is determined whether the card unlocking command meets the processing requirements. If the time node difference is greater than or equal to the preset time node difference, it is determined that the unblocking command meets the processing requirements, and the internal pressure of the downhole unblocking device and the environmental pressure of the downhole unblocking device are obtained according to the unblocking command. If the time node difference is less than the preset time node difference, it is determined that the card unlocking command does not meet the processing requirements, and a log reminder is generated and sent. If the release command does not match the command category of the previous command, it is determined that the release command is different from the previous command, and the internal pressure of the downhole release device and the environmental pressure of the downhole release device are obtained according to the release command.

3. The control method for the downhole unblocking device according to claim 1, characterized in that, When determining whether the downhole unsticking device meets the unsticking conditions based on the internal pressure and the ambient pressure, the following steps are included: Calculate the pressure difference between the internal pressure and the ambient pressure; The determination of whether the downhole unsticking device meets the unsticking conditions is based on the relationship between the pressure difference value and the preset pressure difference value. When the pressure difference is less than the preset pressure difference, it is determined that the downhole release device meets the release conditions. When the pressure difference is greater than or equal to the preset pressure difference, it is determined that the downhole unblocking device does not meet the unblocking conditions, and the pressure of the downhole unblocking device is adjusted based on the balance joint of the downhole unblocking device.

4. The control method for the downhole unblocking device according to claim 1, characterized in that, When correcting the hydraulic oil pressurization pressure of the downhole unblocking device based on the formation pressure E at which the downhole unblocking device is located, to obtain the target hydraulic oil pressurization pressure of the downhole unblocking device, the following steps are included: A first preset formation pressure G1, a second preset formation pressure G2, a third preset formation pressure G3, and a fourth preset formation pressure G4 are preset, and G1 < G2 < G3 < G4. The first preset hydraulic oil pressure correction coefficient h1, the second preset hydraulic oil pressure correction coefficient h2, the third preset hydraulic oil pressure correction coefficient h3, the fourth preset hydraulic oil pressure correction coefficient h4, and the fifth preset hydraulic oil pressure correction coefficient h5 are preset, and 0.8 < h1 < h2 < h3 < h4 < h5 < 1.

2. When the hydraulic oil pressurization pressure of the downhole unblocking device is set to the i-th preset hydraulic oil pressurization pressure Ci, i = 1, 2, 3, 4, 5, the i-th preset hydraulic oil pressurization pressure Ci is corrected according to the relationship between the formation pressure E where the downhole unblocking device is located and each preset formation pressure: When E < G1, the first preset hydraulic oil pressure correction coefficient h1 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h1 of the downhole unblocking device. When G1≤E<G2, the second preset hydraulic oil pressure correction coefficient h2 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h2 of the downhole unblocking device. When G2≤E<G3, the third preset hydraulic oil pressure correction coefficient h3 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h3 of the downhole unblocking device. When G3≤E<G4, the fourth preset hydraulic oil pressure correction coefficient h4 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h4 of the downhole unblocking device. When G4≤E, the fifth preset hydraulic oil pressure correction coefficient h5 is selected to correct the i-th preset hydraulic oil pressure Ci, so as to obtain the target hydraulic oil pressure Ci*h5 of the downhole unblocking device.

5. A control system for a downhole unsticking device, applied to the control method for the downhole unsticking device as described in any one of claims 1-4, characterized in that, include: The acquisition module is used to receive the card release command sent by the control terminal, and to acquire the internal pressure of the downhole card release device and the environmental pressure of the downhole card release device according to the card release command; The judgment module is used to determine whether the downhole unblocking device meets the unblocking conditions based on the internal pressure and the ambient pressure. The data acquisition module is used to acquire the factors related to the release of the downhole unblocking device when the release conditions are met. The setting module is used to set the unblocking control command of the downhole unblocking device according to the unblocking factors, and to control the downhole unblocking device according to the unblocking control command.

6. The control system for the downhole unblocking device according to claim 5, characterized in that, Also includes: The determination module is used to obtain the previous command and determine the command category of the previous command; The matching module is used to match the card unlocking command with the command category of the previous command, and to determine whether the card unlocking command is the same as the previous command. If the card unlocking command matches the command category of the previous command, then it is determined that the card unlocking command is the same as the previous command. The first time node of sending the card unlocking command is collected, and the second time node of sending the previous command is also collected. The time node difference between the first time node and the second time node is calculated. Based on the relationship between the time node difference and a preset time node difference, it is determined whether the card unlocking command meets the processing requirements. If the time node difference is greater than or equal to the preset time node difference, it is determined that the unblocking command meets the processing requirements, and the internal pressure of the downhole unblocking device and the environmental pressure of the downhole unblocking device are obtained according to the unblocking command. If the time node difference is less than the preset time node difference, it is determined that the card unlocking command does not meet the processing requirements, and a log reminder is generated and sent. If the release command does not match the command category of the previous command, it is determined that the release command is different from the previous command, and the internal pressure of the downhole release device and the environmental pressure of the downhole release device are obtained according to the release command.

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