A connection device for large size packer setting tools

Abstract

The application is suitable for the technical field of downhole tools, and provides a connecting device for a large-size packer setting tool, which comprises a sleeve, a sealing assembly, a connecting piece and a shear pin provided on one side of the sleeve, further comprises an extrusion assembly for extruding the sealing assembly and the shear pin, a packer lowering monitoring module for monitoring packer state data and fluid data, a shear pin state analysis module for generating an early fracture risk value, a shear pin early fracture risk early warning module for judging whether the shear pin has an early fracture risk, a lowering speed adjustment value generation module for generating a lowering speed adjustment value, and a lowering speed adjustment module for controlling the lowering speed of the packer; the application can conveniently unlock the connecting device through the clamping piece, and can adjust the lowering speed of the packer through the state of the shear pin, so as to prevent the packer from being set early due to the early fracture of the shear pin, thereby improving the positioning accuracy of the packer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of downhole tools, in particular to a connecting device for large-size packer setting tools. BACKGROUND

[0002] In water injection well operations, the main function of the connecting device is to connect the large-size packer with the setting tool and other downhole equipment such as tubing, forming a complete working system to ensure that the large-size packer can be accurately delivered to the predetermined position.

[0003] A shear pin is usually designed on the connecting device, which plays an important role in controlling the timing of setting during the setting process of the large-size packer. When the large-size packer is lowered to the predetermined position and receives sufficient pressure, the shear pin will be sheared, thereby triggering the setting action of the packer.

[0004] However, in actual application, the setting process of the large-size packer often faces many challenges, one of which is the premature setting of the packer caused by the premature fracture of the shear pin. This not only affects the positioning accuracy of the packer, but also may cause damage to the downhole equipment, and even cause safety accidents. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a connecting device for large-size packer setting tools, which aims to solve the problems existing in the background art.

[0006] The connecting device for large-size packer setting tools provided by the present application comprises a sleeve, the sleeve is sleeved on the tubing, one side of the sleeve is provided with a sealing assembly, and further comprises:

[0007] A connecting piece is arranged on one side of the sleeve and is in sliding connection with the sleeve;

[0008] A shear pin is arranged between the connecting piece and the sleeve, one end of the shear pin is in penetrating connection with the connecting piece, and the other end of the shear pin is in penetrating connection with the sleeve;

[0009] An extrusion assembly is arranged for extruding the sealing assembly and the shear pin; a detachable connection structure is arranged between the extrusion assembly and the sealing assembly;

[0010] A packer lowering monitoring module is arranged for monitoring the state data of the packer and the fluid data of the position of the packer in the well in real time; wherein the state data includes lowering speed, lowering depth and temperature value, and the fluid data includes fluid viscosity and fluid pressure;

[0011] The shear pin state analysis module is configured to establish an early fracture risk assessment model of the shear pin, and to input the state data of the packer and the fluid data of the position of the packer in the well into the early fracture risk assessment model to generate an early fracture risk value of the shear pin.

[0012] The shear pin early fracture risk warning module is configured to determine whether the shear pin has a risk of early fracture according to the early fracture risk value of the shear pin.

[0013] The lowering speed adjustment value generation module is configured to generate a lowering speed adjustment value according to the early fracture risk value of the shear pin if the shear pin has a risk of early fracture, wherein the lowering speed adjustment value refers to an adjusted lowering speed of the packer during lowering from the wellhead to the specified depth.

[0014] The lowering speed adjustment module is configured to control the lowering speed of the packer by the packer lowering mechanism according to the lowering speed adjustment value.

[0015] As a preferred embodiment of the present application, the connecting device for the large-size packer setting tool further comprises:

[0016] The four-petal claw is slidingly arranged on one side of the sleeve and is fixedly connected to one end of the connecting piece.

[0017] The lower connecting piece is arranged on one side of the sleeve, and one side of the lower connecting piece is in abutting connection with one end of the four-petal claw.

[0018] As a preferred embodiment of the present application, the extrusion assembly comprises:

[0019] The extrusion piece is slidingly arranged on one side of the sleeve.

[0020] The clamping piece is fixedly arranged on one side of the extrusion piece.

[0021] As a preferred embodiment of the present application, the packer assembly comprises:

[0022] The sealing rubber tube is arranged on one side of the connecting piece.

[0023] The locking ring is arranged on one side of the sealing rubber tube.

[0024] The connecting groove is formed in the locking ring, and the locking ring is in sliding connection with the clamping piece through the connecting groove.

[0025] The magnetic attraction piece is fixedly arranged in the connecting groove.

[0026] In a preferred embodiment of the present invention, the method for obtaining the premature breakage risk value of the shear pin is as follows:

[0027] A risk assessment model for premature breakage of the shear pin is established. The lowering speed assessment index, lowering depth assessment index, smoothness influence index, and fluid pressure influence index of the packer are obtained. The lowering speed assessment index, lowering depth assessment index, smoothness influence index, and fluid pressure influence index are substituted into the premature breakage risk assessment model to generate the premature breakage risk value Q of the shear pin.

[0028] The expression for the early fracture risk assessment model is as follows:

[0029] ;

[0030] In the expression, S represents the lowering speed evaluation index, N represents the fluid influence index, C represents the temperature influence index, M represents the smoothness influence index, and a1, a2, and a3 are all weighting coefficients.

[0031] The smoothness influence index is obtained as follows:

[0032] Obtain the minimum radius of the wellbore cross-section at the point where the packer is about to reach, and compare the minimum radius of the wellbore cross-section at the point where the packer is about to reach with the theoretical radius of the wellbore cross-section;

[0033] If the minimum radius of the well wall cross-section is less than the theoretical radius of the well wall cross-section, it is marked as a protrusion; where the theoretical radius of the well wall cross-section refers to the theoretical radius of the well wall cross-section in a smooth state;

[0034] Through formula The width L of the protrusion at the generated protrusion c ; Protrusion width L c This refers to the difference between the minimum radius of the well wall cross-section and the theoretical radius, and this difference is a positive number.

[0035] In the formula, L1 represents the minimum radius of the well wall cross-section, and L0 represents the theoretical radius of the well wall cross-section.

[0036] The protrusion width L c The difference between the value and the protrusion width threshold is used to generate a collision difference value; the protrusion width threshold refers to the maximum width between the outer wall of the packer and the well wall;

[0037] The collision difference is compared with the protrusion width threshold to generate the smoothness influence index of the well wall.

[0038] In a preferred embodiment of the present invention, the method for obtaining the deployment speed evaluation index is as follows:

[0039] The setting-down speed of the packer is compared with a setting-down speed threshold value, and if the setting-down speed is higher than the setting-down speed threshold value, the speed is marked as an overspeed; wherein the setting-down speed threshold value refers to the maximum value of a packer setting-down speed safety range, and the packer setting-down speed safety range refers to a range of stable setting-down speeds that the packer can maintain during the setting-down process;

[0040] The overspeed is subjected to difference processing with the setting-down speed threshold value to generate an overspeed value;

[0041] The overspeed value is subjected to ratio processing with the setting-down speed threshold value to generate an overspeed factor;

[0042] The current setting-down speed is subjected to difference calculation with the latest historical setting-down speed to generate a real-time speed change value of the packer; the historical setting-down speed refers to historical monitoring data acquired by the speed sensor at the latest time point;

[0043] Based on Newton's second law, the acceleration force value of the shear pin is generated according to the real-time speed change value; the acceleration force value refers to the pushing force generated by the connecting piece on the shear pin due to the speed change;

[0044] The acceleration force value is subjected to ratio calculation with the maximum force value of the shear pin to obtain an acceleration factor;

[0045] The overspeed factor and the acceleration factor are subjected to weighted summation to obtain a setting-down speed evaluation index.

[0046] As a preferred embodiment of the present application, the temperature influence index is obtained in the following manner:

[0047] The temperature value is compared with a temperature safety range, and if the temperature value is not within the temperature safety range, the temperature is marked as an overtemperature;

[0048] The overtemperature is subjected to difference processing with the nearest endpoint of the temperature safety range to generate a temperature difference value;

[0049] The temperature difference value is subjected to ratio processing with the nearest endpoint of the temperature safety range to generate a temperature difference factor;

[0050] According to the historical monitoring data, the duration of the overtemperature is obtained and marked as an overtemperature duration;

[0051] The overtemperature duration is subjected to difference processing with an overtemperature bearing safety duration of the shear pin to generate an overtemperature duration difference value;

[0052] The overtemperature duration difference value is subjected to ratio processing with the overtemperature bearing safety duration of the shear pin to generate an overtemperature duration factor;

[0053] The temperature difference factor and the overtemperature duration factor are subjected to weighted summation to generate a temperature influence index.

[0054] As a preferred embodiment of the present application, the fluid influence index is obtained in the following manner:

[0055] According to the depth of the packer, the depth of the packer in the fluid is obtained;

[0056] Based on the hydrostatic pressure theory, the pressure generated by the fluid on the packer is generated according to the depth of the packer in the fluid, and is marked as fluid pressure;

[0057] The fluid pressure is subtracted from the maximum value of the theoretical bearing pressure range of the shear pin to generate a pressure difference;

[0058] The pressure difference is divided by the maximum value of the theoretical bearing pressure range to generate a pressure factor;

[0059] The fluid viscosity at the location of the packer is obtained, and the resistance of the fluid to the packer is generated according to the contact area of the connector and the four-petal claw with the fluid and the packer lowering speed;

[0060] Based on mechanical conversion, the resistance is converted to the force of the connector on the shear pin according to the friction between the connector and the casing;

[0061] The force is subtracted from the maximum value of the theoretical bearing force range of the shear pin to generate a force difference;

[0062] The force difference is divided by the maximum value of the theoretical bearing force range of the shear pin to generate a viscosity factor;

[0063] The pressure factor and the viscosity factor are weighted and summed to generate a fluid influence index.

[0064] As a preferred embodiment of the present application, the early fracture risk warning module of the shear pin is warned in the following manner:

[0065] The early fracture risk value Q is compared with the early fracture risk threshold value, and if the early fracture risk value Q is greater than or equal to the early fracture risk threshold value, the higher the early fracture risk value Q, the greater the early fracture risk of the shear pin, and a judgment result is generated, which is that the shear pin has a high risk of early fracture; wherein the early fracture risk threshold value refers to the maximum value of the safe range of the early fracture risk of the shear pin.

[0066] As a preferred embodiment of the present application, the lowering speed adjustment value is obtained in the following manner:

[0067] A down-putting speed adjustment analysis model is established, the current down-putting speed and the early fracture risk value Q are substituted into the down-putting speed generation speed adjustment analysis model to generate the down-putting speed adjustment value Ts;

[0068] The expression of the down-putting speed adjustment analysis model is:

[0069] ;

[0070] Wherein, V represents the current down-putting speed of the packer, and Q represents the early fracture risk value of the shear pin.

[0071] The application can make the connection device and the large-size packer and the setting tool be conveniently unlocked through the clamping piece, and can also analyze and warn the state of the shear pin, timely adjust the down-putting speed of the packer through the warning information, prevent the packer from being set early due to the early fracture of the shear pin, and thus improve the positioning accuracy of the packer in the setting process. BRIEF DESCRIPTION OF DRAWINGS

[0072] Figure 1 A perspective view of the connection device for the large-size packer setting tool is provided for the embodiment of the application;

[0073] Figure 2 A sectional view of the connection device for the large-size packer setting tool is provided for the embodiment of the application;

[0074] Figure 3 A schematic view of part of the structure of the connection device for the large-size packer setting tool is provided for the embodiment of the application;

[0075] Figure 4 A Figure 3 enlarged view of a part B in the middle;

[0076] Figure 5 A Figure 2 enlarged view of a part A in the middle.

[0077] In the drawings: 1, a casing; 2, a tubing; 3, an extrusion assembly; 4, a setting tool; 5, a packer assembly; 6, a well wall; 302, an extrusion piece; 303, a clamping piece; 401, a four-petal claw; 402, a lower connecting piece; 403, a connecting piece; 404, a shear pin; 501, a sealing rubber tube; 502, a locking ring; 503, a connecting groove; 504, a magnetic attraction piece. DETAILED DESCRIPTION

[0078] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0079] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0080] like Figure 1 The diagram shown is a structural diagram of a connecting device for a large packer setting tool provided in an embodiment of the present invention. It includes a casing 1, a tubing 2 and a well wall 6. The casing 1 is disposed on one side of the tubing 2 and is slidably connected to the tubing 2. A packer assembly 5 is provided on one side of the tubing 2, a compression assembly 3 is provided on one side of the packer assembly 5, and a setting tool 4 is provided on one side of the packer assembly 5.

[0081] Specifically, the casing 1 is slid along the outer wall of the tubing 2 by the ground equipment. The casing 1 drives the extrusion assembly 3 and the setting tool 4 to move linearly. At the same time, the packer assembly 5 moves linearly with the setting tool 4 due to gravity and friction. When the device reaches the designated position, pressure is applied to the extrusion assembly 3, which slides linearly along the casing 1. While the extrusion assembly 3 is sliding linearly, it pushes the setting tool 4 to slide linearly, so that the setting tool 4 contacts and connects with the well wall 6. Pressure is then applied to the extrusion assembly 3. Since the setting tool 4 no longer moves, the extrusion assembly 3 will compress the packer assembly 5, causing the packer assembly 5 to deform and contact and connect with the well wall 6, thus completing the sealing of the well wall 6.

[0082] It should be explained that the methods of applying pressure to the extrusion assembly 3 include, but are not limited to, setting a threaded rod on the extrusion assembly 3 and driving the extrusion assembly 3 to move linearly by rotating the threaded rod, or dropping a steel ball into the well wall 6 from the wellhead and driving the extrusion assembly 3 to move linearly by gravity.

[0083] like Figure 2 , Figure 4 and Figure 5 As shown, the extrusion assembly 3 includes:

[0084] The extrusion member 302 is slidably disposed on one side of the sleeve 1. The extrusion member 302 is also connected to a lowering mechanism, one end of which is fixedly connected to the extrusion member 302 to maintain the lifting and lowering of the extrusion member 302.

[0085] The snap-fit ​​component 303 is fixedly disposed on one side of the extrusion component 302.

[0086] The sealing component 5 includes:

[0087] A sealing rubber sleeve 501 is disposed on the outer wall of the oil pipe 2;

[0088] A locking ring 502 is arranged on one side of the sealing rubber sleeve 501, and a limiting ring is arranged on one side of the locking ring 502, and a rotation limiting piece is arranged between the locking ring 502 and the connecting piece 403;

[0089] A connecting groove 503 is arranged on the locking ring 502, and the locking ring 502 is connected with the clamping piece 303 through the connecting groove 503;

[0090] A magnetic attraction piece 504 is fixedly arranged in the connecting groove 503;

[0091] The clamping piece 303 and the connecting groove 503 are in a detachable connection structure, and when the rotation angle of the extrusion piece 302 reaches a set angle, the extrusion piece 302 is pulled in the vertical direction, and the extrusion piece 302 drives the clamping piece 303 to be separated from the connecting groove 503, so that the clamping piece 303 and the connecting groove 503 are detachable;

[0092] Specifically, when the extrusion assembly 3 is subjected to pressure, the extrusion piece 302 in the extrusion assembly 3 moves linearly, the extrusion piece 302 pushes the locking ring 502 to move linearly, when the locking ring 502 moves linearly, the locking ring 502 extrudes one side of the sealing rubber sleeve 501, so that the sealing rubber sleeve 501 is deformed, and finally the sealing rubber sleeve 501 is in contact with the well wall 6, so that the well wall 6 is sealed; when the well wall 6 is sealed, the extrusion piece 302 is rotated by the lowering mechanism, the extrusion piece 302 drives the clamping piece 303 to slide along the connecting groove 503, and then the extrusion piece 302 is subjected to linear motion in the vertical direction by the lowering mechanism, so that the extrusion piece 302 drives the clamping piece 303 to be separated from the connecting groove 503, and the recovery function of the extrusion assembly 3 is completed. The operation can quickly recover the extrusion assembly 3, and improve the working efficiency of the device;

[0093] In addition, one side of the magnetic attraction piece 504 arranged in the connecting groove 503 is a magnetic attraction surface, one side of the clamping piece 303 is magnetically connected with the magnetic attraction piece 504, and the magnetic force can prevent the clamping piece 303 from sliding in the connecting groove 503, when the extrusion piece 302 is rotated by the lowering mechanism, and the rotation force is greater than the magnetic attraction force of the magnetic attraction piece 504, the magnetic attraction connection between the clamping piece 303 and the magnetic attraction piece 504 is disconnected, and the recovery of the extrusion assembly 3 is completed.

[0094] As shown in Figure 2 and Figure 5 The setting tool 4 comprises:

[0095] The four-petal claw 401 is slidably arranged on one side of the casing 1, and one end of the four-petal claw 401 is fixedly connected with the connecting piece 403;

[0096] lower connector 402 is arranged on one side of the sleeve 1, and one side of the lower connector 402 is in abutting connection with one end of the four-petal claw 401;

[0097] connector 403 is arranged on one side of the sleeve 1 and is in sliding connection with the sleeve 1;

[0098] shear pin 404 is arranged between the connector 403 and the sleeve 1, one end of the shear pin 404 is in penetrating connection with the connector 403, and the other end of the shear pin 404 is in penetrating connection with the sleeve 1;

[0099] Specifically, when the extrusion piece 302 is subjected to linear motion under pressure, the extrusion piece 302 will apply an action force in the same motion direction to the connector 403, so that the connector 403 applies pressure to the shear pin 404, and when the pressure applied by the connector 403 to the shear pin 404 is greater than the limit pressure that the shear pin 404 can withstand, the shear pin 404 will be broken, ending the support of the shear pin 404 to the connector 403, and the connector 403 will continue to slide along the outer wall of the sleeve 1 due to gravity, and the connector 403 drives the four-petal claw 401 to slide along the outer wall of the sleeve 1, when the four-petal claw 401 slides, one end of the four-petal claw 401 is in abutting connection with the lower connector 402, and if pressure is continuously applied to the extrusion piece 302, the extrusion piece 302 will continue to push the connector 403 to slide, and the connector 403 drives the four-petal claw 401 to slide, and since one side of the lower connector 402 is a slope, the claw head of the four-petal claw 401 will continue to slide along the slope, at this time, the four-petal claw 401 will continue to deform, so that the width of the four-petal claw 401 on one side from the well wall 6 continues to decrease, until the claw head of the four-petal claw 401 is in abutting connection with the well wall 6, and due to the friction between the four-petal claw 401 and the well wall 6, the four-petal claw 401 will stop sliding; at the same time, continuous pressure applied to the extrusion piece 302 will drive the extrusion piece 302 to slide the locking ring 502, the locking ring 502 compresses the sealing rubber cylinder 501, and the sealing of the well wall 6 is completed.

[0100] Preferably, the locking ring 502 and one side of the connector 403 are respectively provided with convex strips that mutually engage, when the extrusion assembly 3 is recycled, the locking ring 502 relies on the friction force generated by the mutually engaging convex strips to offset the pushing force generated by the sealing rubber cylinder 501 on the locking ring 502 due to its elasticity, so that the sealing rubber cylinder 501 can continuously abut against the well wall 6 and maintain the sealing property of the sealed part.

[0101] The connecting device for the large-size packer setting tool provided by the application further comprises:

[0102] The packer lowering monitoring module is used for monitoring state data of the packer and fluid data of a position of the packer in the well in real time; wherein the state data comprises lowering speed, lowering depth and temperature value, and the fluid data comprises fluid viscosity and fluid pressure;

[0103] The shear pin state analysis module is used for establishing an early fracture risk assessment model of the shear pin 404, substituting the state data of the packer and the fluid data of the position of the packer in the well into the early fracture risk assessment model, and generating an early fracture risk value of the shear pin 404;

[0104] The shear pin early fracture risk warning module is used for judging whether the shear pin 404 has a risk of early fracture according to the early fracture risk value of the shear pin 404;

[0105] The lowering speed adjustment value generation module is used for generating a lowering speed adjustment value according to the early fracture risk value of the shear pin 404 if the shear pin 404 has a risk of early fracture; the lowering speed adjustment value refers to an adjusted lowering speed of the packer during lowering from the wellhead to a specified depth;

[0106] The lowering speed adjustment module is used for controlling the lowering speed of the packer lowering mechanism according to the lowering speed adjustment value;

[0107] Specifically, the shear pin state analysis module is used for predicting the fracture risk of the shear pin 404, and the shear pin early fracture risk warning module is used for judging the fracture risk of the shear pin 404 during lowering of the packer; if the shear pin 404 has a risk of early fracture, the lowering speed of the packer is adjusted, which can effectively prevent the packer from being prematurely set due to early fracture of the shear pin 404, thereby improving the positioning accuracy of the packer during setting.

[0108] Preferably, the early fracture risk value of the shear pin 404 is obtained in the following manner:

[0109] The early fracture risk assessment model of the shear pin 404 is established, lowering speed evaluation index, lowering depth evaluation index, smoothness influence index and fluid pressure influence index of the packer are obtained, and the lowering speed evaluation index, the lowering depth evaluation index, the smoothness influence index and the fluid pressure influence index are substituted into the early fracture risk assessment model to generate the early fracture risk value Q of the shear pin 404;

[0110] Wherein, the expression of the early fracture risk assessment model is:

[0111] ;

[0112] In the expression, S represents a lowering speed evaluation index, N represents a fluid influence index, C represents a temperature influence index, M represents a smoothness influence index, a1, a2, a3 are weight coefficients;

[0113] The smoothness influence index is obtained in the following manner:

[0114] The minimum radius of the well wall 6 cross section at the position where the packer is about to arrive is obtained, and the minimum radius of the well wall 6 cross section at the position where the packer is about to arrive is compared with the theoretical radius of the well wall 6 cross section;

[0115] If the minimum radius of the well wall 6 cross section is greater than the theoretical radius of the well wall 6 cross section, it is marked as a concave position;

[0116] If the minimum radius of the well wall 6 cross section is equal to the theoretical radius of the well wall 6 cross section, it is marked as a smooth position;

[0117] If the minimum radius of the well wall 6 cross section is less than the theoretical radius of the well wall 6 cross section, it is marked as a convex position;

[0118] The theoretical radius of the well wall 6 cross section refers to the theoretical radius of the well wall 6 cross section in a smooth state;

[0119] The convex width L c of the convex position is generated by the formula The convex width L c refers to the difference between the minimum radius of the well wall 6 cross section and the theoretical radius, and the difference is taken as a positive number;

[0120] In the formula, L1 represents the minimum radius of the well wall 6 cross section, and L0 represents the theoretical radius of the well wall 6 cross section;

[0121] The convex width L c is difference processed with a convex width threshold to generate a collision difference; the convex width threshold refers to the maximum width of the outer wall of the packer from the well wall 6;

[0122] The collision difference is ratio processed with the convex width threshold to generate the smoothness influence index of the well wall 6.

[0123] Preferably, the lowering speed evaluation index is obtained in the following manner:

[0124] The lowering speed of the packer is compared with a lowering speed threshold, and if the lowering speed is lower than the lowering speed threshold, the speed is marked as a non-super speed;

[0125] If the running-in speed is higher than the running-in speed threshold, the speed is marked as an overspeed speed; wherein the running-in speed threshold refers to the maximum value of the packer running-in speed safety range, and the packer running-in speed safety range refers to a range of stable running-in speed that the packer can maintain during the running-in process;

[0126] The overspeed speed is subjected to difference processing with the running-in speed threshold to generate an overspeed value;

[0127] The overspeed value is subjected to ratio processing with the running-in speed threshold to generate an overspeed factor;

[0128] The current running-in speed is subjected to difference calculation with the latest historical running-in speed to generate a real-time speed change value of the packer; the historical running-in speed refers to historical monitoring data acquired by the speed sensor at the latest time point;

[0129] Based on Newton's second law, the acceleration force value of the shear pin 404 is generated according to the real-time speed change value; the acceleration force value refers to a pushing force generated by the connecting piece 403 on the shear pin 404 due to the speed change;

[0130] It should be noted that the speed change value and the time difference are substituted into the acceleration formula to derive the acceleration of the packer, and then the acceleration and the mass of the connecting piece 403 are substituted into Newton's second law to obtain the acceleration force value;

[0131] The acceleration force value is subjected to ratio calculation with the maximum force value of the shear pin 404 to obtain an acceleration factor;

[0132] The overspeed factor and the acceleration factor are subjected to weighted summation to obtain a running-in speed evaluation index.

[0133] Preferably, the temperature influence index is obtained in the following manner:

[0134] The temperature value is compared with the temperature safety range, and if the temperature value is within the temperature safety range, the temperature is marked as a normal temperature;

[0135] If the temperature value is not within the temperature safety range, the temperature is marked as an over-temperature temperature;

[0136] The over-temperature temperature is subjected to difference processing with the nearest endpoint of the temperature safety range to generate a temperature difference value; the nearest endpoint of the temperature safety range refers to the temperature safety range endpoint closest to the over-temperature temperature, which is the maximum value or the minimum value of the temperature safety range;

[0137] The temperature difference value is subjected to ratio processing with the nearest endpoint of the temperature safety range to generate a temperature difference factor;

[0138] According to historical monitoring data, the duration of the over-temperature temperature is obtained, and is marked as an over-temperature duration;

[0139] The over-temperature duration is subtracted from the over-temperature bearing safety duration of the shear pin 404 to generate an over-temperature duration difference; the over-temperature bearing safety duration refers to the maximum duration that the shear pin 404 can bear the over-temperature temperature without affecting its performance;

[0140] The over-temperature duration difference is divided by the over-temperature bearing safety duration of the shear pin 404 to generate an over-temperature duration factor;

[0141] The temperature difference factor and the over-temperature duration factor are weighted and summed to generate a temperature influence index.

[0142] Preferably, the fluid influence index is obtained in the following manner:

[0143] According to the lowering depth of the packer, the depth of the packer in the fluid is obtained;

[0144] Based on the hydrostatic pressure theory, the pressure generated by the fluid on the packer is generated according to the depth of the packer in the fluid, and is marked as fluid pressure;

[0145] The fluid pressure is subtracted from the maximum value of the theoretical bearing pressure range of the shear pin 404 to generate a pressure difference;

[0146] The pressure difference is divided by the maximum value of the theoretical bearing pressure range to generate a pressure factor;

[0147] The fluid viscosity at the position of the packer is obtained, and the fluid resistance to the packer is generated according to the contact area of the connecting piece 403 and the four-petal claw 401 with the fluid and the packer lowering speed;

[0148] Based on mechanical conversion, the resistance is converted into the acting force of the setting tool 4 on the shear pin 404 according to the friction between the setting tool 4 and the casing 1;

[0149] The acting force is subtracted from the maximum value of the theoretical bearing force range of the shear pin 404 to generate an acting force difference; the maximum value of the theoretical bearing force range of the shear pin 404 refers to the maximum acting force that the shear pin 404 can bear while remaining unbroken;

[0150] The acting force difference is divided by the maximum value of the theoretical bearing force range of the shear pin 404 to generate a viscosity factor;

[0151] The pressure factor and the viscosity factor are weighted and summed to generate a fluid influence index.

[0152] Preferably, the early fracture risk warning mode of the early fracture risk warning module is:

[0153] The early fracture risk value Q is compared with the early fracture risk threshold value, if the early fracture risk value Q is greater than or equal to the early fracture risk threshold value, the higher the early fracture risk value Q, the greater the early fracture risk of the shear pin 404, and a judgment result is generated, and the judgment result is that the shear pin 404 has a too high risk of early fracture; wherein the early fracture risk threshold value refers to the maximum value of the safe range of the early fracture risk of the shear pin 404.

[0154] Preferably, the acquisition mode of the lowering speed adjustment value is:

[0155] The lowering speed adjustment analysis model is established, the current lowering speed and the early fracture risk value Q are substituted into the lowering speed generation speed adjustment analysis model to generate the lowering speed adjustment value Ts;

[0156] The expression of the lowering speed adjustment analysis model is:

[0157] ;

[0158] Wherein, V represents the current lowering speed of the packer, and Q represents the early fracture risk value of the shear pin 404.

[0159] Preferably, the adjustment mode of the lowering speed adjustment module comprises:

[0160] When receiving the lowering speed adjustment value Ts, the lowering speed of the packer is adjusted according to the lowering speed adjustment value Ts, that is, the lowering speed of the casing 1 is adjusted;

[0161] The lowering of the casing 1 by the lowering mechanism is carried out by the conveying member arranged on one side of the casing 1, and the lowering speed of the packer can be adjusted by controlling the movement speed of the conveying member;

[0162] The form of the conveying member includes but is not limited to threaded rods, ropes and the like.

[0163] As a preferred embodiment of the present application, the type of the packer includes but is not limited to

[0164] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A connecting device for a large-size packer setting tool, comprising a sleeve fitted onto a tubing, wherein a packer assembly is provided on one side of the sleeve, characterized in that, Also includes: A connector, wherein the connector is disposed on one side of the sleeve and is slidably connected to the sleeve; A shear pin is provided between the connector and the sleeve, with one end of the shear pin inserted into the connector and the other end of the shear pin inserted into the sleeve. An extrusion assembly is used to extrude the sealing assembly and the shear pin; a detachable connection structure is provided between the extrusion assembly and the sealing assembly; The packer lowering monitoring module is used to monitor the status data of the packer and the fluid data of the packer's location in the well in real time. The status data includes the lowering speed, lowering depth and temperature value, and the fluid data includes fluid viscosity and fluid pressure. The shear pin status analysis module is used to establish a risk assessment model for premature breakage of the shear pin. It substitutes the status data of the packer and the fluid data of the packer's location in the well into the premature breakage risk assessment model to generate the risk value of premature breakage of the shear pin. The shear pin premature breakage risk warning module is used to determine whether there is a risk of premature breakage of the shear pin based on the premature breakage risk value of the shear pin; The descent speed adjustment value generation module generates a descent speed adjustment value based on the risk value of the premature breakage of the shear pin if there is a risk of premature breakage of the shear pin. The descent speed adjustment value refers to the descent speed that needs to be adjusted during the process of lowering the packer from the wellhead to the specified depth. The lowering speed adjustment module is used to control the lowering speed of the packer lowering mechanism according to the lowering speed adjustment value; Also includes: The four-lobed claw is slidably disposed on one side of the sleeve and one end is fixedly connected to the connector. The lower connector is disposed on one side of the sleeve, and one side of the lower connector is in contact with one end of the four-lobed claw. The extrusion assembly includes: An extrusion member, which is slidably disposed on one side of the sleeve; A snap-fit ​​connector, which is fixedly disposed on one side of the extruded component; The sealing assembly includes: A sealing rubber sleeve is disposed on one side of the connector; A locking ring is disposed on one side of the sealing rubber cylinder; A connecting groove is formed on the locking ring, and the locking ring is slidably connected to the snap-fit ​​member through the connecting groove; A magnetic suction element is fixedly disposed within the connecting groove.

2. The connecting device for a large-size packer setting tool according to claim 1, characterized in that, The method for obtaining the premature breakage risk value of the shear pin is as follows: A risk assessment model for premature breakage of the shear pin is established. The lowering speed assessment index, lowering depth assessment index, smoothness influence index, and fluid pressure influence index of the packer are obtained. The lowering speed assessment index, lowering depth assessment index, smoothness influence index, and fluid pressure influence index are substituted into the premature breakage risk assessment model to generate the premature breakage risk value Q of the shear pin. The expression for the early fracture risk assessment model is as follows: ； In the expression, S represents the lowering speed evaluation index, N represents the fluid influence index, C represents the temperature influence index, M represents the smoothness influence index, and a1, a2, and a3 are all weighting coefficients. The smoothness influence index is obtained as follows: Obtain the minimum radius of the wellbore cross-section at the point where the packer is about to reach, and compare the minimum radius of the wellbore cross-section at the point where the packer is about to reach with the theoretical radius of the wellbore cross-section; If the minimum radius of the well wall cross-section is less than the theoretical radius of the well wall cross-section, it is marked as a protrusion; where the theoretical radius of the well wall cross-section refers to the theoretical radius of the well wall cross-section in a smooth state; Through formula The width L of the protrusion at the generated protrusion c ; Protrusion width L c This refers to the difference between the minimum radius of the well wall cross-section and the theoretical radius, and this difference is a positive number. In the formula, L1 represents the minimum radius of the well wall cross-section, and L0 represents the theoretical radius of the well wall cross-section. The protrusion width L c The difference between the value and the protrusion width threshold is used to generate a collision difference value; the protrusion width threshold refers to the maximum width between the outer wall of the packer and the well wall; The collision difference is compared with the protrusion width threshold to generate the smoothness influence index of the well wall.

3. The connecting device for a large-size packer setting tool according to claim 2, characterized in that, The method for obtaining the decentralization speed evaluation index is as follows: The packer's descent speed is compared with a descent speed threshold. If the descent speed is higher than the descent speed threshold, the speed is marked as an overspeed. The descent speed threshold refers to the maximum value of the packer's descent speed within a safe range, and the safe range of the packer's descent speed refers to the range within which the packer can maintain a stable descent speed during the descent process. The difference between the overspeed speed and the lowering speed threshold is processed to generate the overspeed value; The overspeed value is compared with the lowering speed threshold to generate an overspeed factor; The difference between the current deployment speed and the most recent historical deployment speed is calculated to generate the real-time speed change value of the packer; the historical deployment speed refers to the historical monitoring data of the most recent time point obtained by the speed sensor; Based on Newton's second law, the acceleration force value of the shear pin is generated according to the real-time velocity change value; the acceleration force value refers to the thrust generated by the connector on the shear pin due to the velocity change. The acceleration factor is obtained by calculating the ratio of the acceleration force value to the maximum force value of the shear pin. The overspeed factor and acceleration factor are weighted and summed to obtain the decentralization speed evaluation index.

4. The connecting device for a large-size packer setting tool according to claim 2, characterized in that, The temperature influence index is obtained as follows: The temperature value is compared with the safe temperature range. If the temperature value is not within the safe temperature range, the temperature is marked as an over-temperature. The temperature difference value is generated by taking the difference between the over-temperature and the nearest endpoint of the safe temperature range. The temperature difference factor is generated by comparing the temperature difference value with the nearest endpoint of the safe temperature range. Based on historical monitoring data, the duration of the temperature exceeding the limit is obtained and marked as the temperature exceeding the limit duration; The difference between the over-temperature duration and the over-temperature withstand safety duration of the shear pin is processed to generate an over-temperature duration difference value. The over-temperature duration difference is compared with the over-temperature withstand safety duration of the shear pin to generate an over-temperature duration factor. The temperature difference factor and the over-temperature duration factor are weighted and summed to generate the temperature influence index.

5. A connecting device for a large-size packer setting tool according to claim 2, characterized in that, The fluid influence index is obtained as follows: The depth of the packer in the fluid is obtained based on the packer's descent depth. Based on the hydrostatic pressure theory, the pressure exerted by the fluid on the packer is generated according to the depth of the packer in the fluid, and is denoted as the fluid pressure. The pressure difference is generated by taking the difference between the fluid pressure and the maximum value of the theoretical pressure range that the shear pin can withstand. The pressure factor is generated by comparing the pressure difference with the maximum value of the theoretically withstand pressure range. Obtain the fluid viscosity at the location of the packer, and generate the fluid resistance to the packer based on the contact area between the connector and the four-lobed claw and the fluid, and the packer lowering speed. Based on mechanical transformation, the resistance is converted into the force exerted by the connector on the shear pin according to the friction between the connector and the sleeve. The difference between the applied force and the maximum value of the theoretical bearing capacity range of the shear pin is processed to generate the applied force difference value; The viscosity factor is generated by comparing the difference in force with the maximum value of the theoretical bearing capacity range of the shear pin. The pressure factor and viscosity factor are weighted and summed to generate the fluid influence index.

6. A connecting device for a large-size packer setting tool according to claim 2, characterized in that, The warning method of the early warning module for the premature breakage risk of the shear pin is as follows: The premature breakage risk value Q is compared with the premature breakage risk threshold. If the premature breakage risk value Q is greater than or equal to the premature breakage risk threshold, it means that the higher the premature breakage risk value Q is, the greater the risk of premature breakage of the shear pin. A judgment result is then generated, which indicates that the risk of premature breakage of the shear pin is too high. The premature breakage risk threshold refers to the maximum value of the safe range of premature breakage risk of the shear pin.

7. A connecting device for a large-size packer setting tool according to claim 1, characterized in that, The method for obtaining the lowering speed adjustment value is as follows: A decommissioning speed adjustment analysis model is established. The current decommissioning speed and the risk value of premature breakage Q are substituted into the decommissioning speed generation speed adjustment analysis model to generate the decommissioning speed adjustment value Ts. The expression for the analysis model of adjusting the lowering speed is as follows: ； Where V represents the current lowering speed of the packer, and Q represents the risk value of premature breakage of the shear pin.

Images