阅读说明：本技术 一种井下推靠器 (Underground sidewall contact device ) 是由 张嘉伟 蔡池渊 赛芳 陈敬智 王光伟 姜志敏 陈向新 于 2020-06-10 设计创作，主要内容包括：本申请实施例公开了一种井下推靠器,包括：多个推靠臂和推靠单元；多个推靠臂与推靠单元相连；推靠单元与地面系统相连；推靠单元用于控制任意一个或多个推靠臂的打开或关闭,根据推靠臂的张开尺寸计算井径,实时采集推靠臂传递的压力,并将井径和压力传输给地面系统。通过该实施例方案,实现了地面实时控制以及推靠参数的实时监控,实现了推靠臂的灵活控制,具有良好的操控特性和实用性。(The embodiment of the application discloses a sidewall contact device in pit includes: a plurality of backup arms and backup units; the plurality of backup arms are connected with the backup units; the pushing unit is connected with the ground system; the pushing unit is used for controlling the opening or closing of any one or more pushing arms, calculating the well diameter according to the opening size of the pushing arms, collecting the pressure transmitted by the pushing arms in real time, and transmitting the well diameter and the pressure to the ground system. Through the scheme of the embodiment, the ground real-time control and the real-time monitoring of the pushing parameters are realized, the flexible control of the pushing arm is realized, and the pushing arm has good control characteristics and practicability.)

1. A downhole sidewall contact comprising: a plurality of backup arms and backup units; the plurality of backup arms are connected with the backup units; the pushing unit is connected with a ground system;

the pushing unit is used for controlling the opening or closing of any one or more pushing arms, calculating the hole diameter according to the opening size of the pushing arms, collecting the pressure transmitted by the pushing arms in real time, and transmitting the hole diameter and the pressure to the ground system.

2. The downhole sidewall contact of claim 1, wherein the sidewall contact unit comprises: the first control module and the pushing arm drive motor;

the first control module is connected with the ground system through a cable and an internal bus of the underground backup device, receives a control command sent by the ground system, and generates control instructions of the plurality of backup arm driving motors according to the control command;

and the pushing arm driving motor is connected with the plurality of pushing arms and used for driving the plurality of pushing arms to be opened and closed according to the control instruction.

3. The downhole sidewall contact of claim 2, wherein the sidewall contact unit further comprises: the second control module is connected with the first control module;

the second control module is respectively connected with the plurality of pushing arms through a plurality of groups of linkage rods and pull rod potentiometers which are connected with each other, and is used for detecting the pressure transmitted by the pushing arm corresponding to each linkage rod through each linkage rod and sending the pressure to the first control module through an internal bus;

the first control module is further configured to transmit the pressure to the surface system.

4. The downhole sidewall contact of claim 3, wherein the sidewall contact unit further comprises: the third control module is connected with the first control module;

the third control module is connected with each pull rod potentiometer and used for calculating the opening size of the pushing arm corresponding to each pull rod potentiometer according to the resistance value of each pull rod potentiometer and calculating the well diameter according to the opening sizes of the pushing arms; sending the well diameter to the first control module through an internal bus; wherein, the resistance value of each pull rod potentiometer is in direct proportion linear relation with the opening size change of the corresponding push arm;

the first control module is further configured to transmit the caliper to the surface system.

5. The downhole sidewall contact of claim 2, wherein the control command comprises a fishing command; the first control module is further used for controlling the pushing arm driving motor to drive the plurality of pushing arms to be opened according to the fishing command, and measuring the well diameter in real time to serve as reference data of a fishing process;

the downhole sidewall contact further comprises a fishing unit; the fishing unit is connected with the surface system and used for fishing the tools falling into the well under the command and the coordination of the surface system.

6. The downhole sidewall contact of claim 5, wherein the fishing unit comprises: the fourth control module and the mechanical gripper;

the fourth control module is connected with the mechanical gripper and used for controlling the mechanical gripper to be opened or closed according to the fishing command so as to grasp or release the fished tool;

wherein the fourth control module controls the opening or closing of the mechanical gripper in the fishing process comprises:

after the ground system sends the fishing command, controlling the mechanical gripper to be opened to a maximum opening angle;

after the ground system lowers the underground backup device to the bottom end of the underground backup device to be contacted with the salvaged tool, the mechanical hand grip is controlled to be closed, so that the mechanical hand grip is contacted with the shell of the salvaged tool and is embedded into the joint groove of the salvaged tool to grip the salvaged tool.

7. The downhole sidewall contact of claim 6, wherein the fishing unit further comprises: an electromagnet; the electromagnet is arranged below the fourth control module;

the fourth control module is electrically connected with the electromagnet and is used for electrifying a coil of the electromagnet according to an electromagnet electrifying instruction issued by the ground system after the mechanical gripper grabs the salvaged tool;

and the electromagnet is used for generating magnetism after being electrified on the coil so as to adsorb the salvaged appliance.

8. The downhole sidewall contact of claim 6, wherein the surface system in cooperation with the fishing unit fishing tool to fish a dropped well comprises:

after the mechanical hand is in contact with the shell of the tool to be salvaged, in the process that the underground backup device is lifted by the ground system, whether the mechanical hand is successfully embedded into the joint groove of the tool to be salvaged is judged by monitoring the change of the lifting force value of the mechanical hand collected in real time in the fourth control module; judging whether the mechanical gripper is closed in place or not according to the change of the power supply current of the ground system;

when the lifting force value of the mechanical hand grip is gradually increased to a numerical value and is stabilized at the numerical value, the mechanical hand grip is judged to be successfully embedded into the joint groove of the salvaged tool; when the power supply current on the surface system is stable it is determined that the mechanical gripper has closed into position and has gripped the tool being fished.

9. The downhole sidewall contact of claim 4, further comprising a drop prevention system; the anti-falling system comprises the pushing unit and a telescopic block; the telescopic block is arranged on the side face of the second control module and is connected with a rotating motor in the second control module;

the second control module is further used for judging that the underground telescoping ram is in a falling state according to the detected pull-down force of the linkage rod, controlling the rotating motor to start, driving the telescopic block to extend outwards and contact with the well wall through the rotating motor, wherein along with the continuation of the falling state, the contact tightness of the telescopic block and the well wall is increased.

10. The downhole sidewall contact device of claim 9, wherein the first control module is further configured to control the backup arm driving motor to be activated when the second control module determines that the downhole sidewall contact device is in a falling state, so that the backup arm driving motor drives one or more backup arms to open, so as to assist in preventing the downhole sidewall contact device from falling due to the resistance between the backup arms and the borehole wall.

Technical Field

The present invention relates to the design technology of underground equipment, and is especially one kind of underground pushing ram.

Background

The sidewall contact device is a device for pressing a downhole logging instrument to a well wall, and the prior logging methods such as density logging require a detector to be attached to the well wall, so the sidewall contact device plays an important role in logging operation.

The existing underground backup device tool is simple in structure and single in function, independent leg opening control cannot be achieved, unfreezing is difficult to achieve when an instrument is blocked, ground real-time control cannot be achieved, and underground hole diameter and leg opening pressure cannot be monitored.

Disclosure of Invention

The embodiment of the application provides a sidewall contact device in pit, can realize ground real-time control and push away by the real time monitoring of parameter, realize the nimble control of pushing back the arm, have good characteristics and the practicality of controlling.

An embodiment of the application provides a downhole sidewall contact device, which may include: a plurality of backup arms and backup units; the plurality of backup arms are connected with the backup units; the pushing unit can be connected with a ground system;

the pushing unit can be used for controlling the opening or closing of any one or more pushing arms, calculating the hole diameter according to the opening size of the pushing arms, collecting the pressure transmitted by the pushing arms in real time, and transmitting the hole diameter and the pressure to the ground system.

In an exemplary embodiment of the present application, the pushing unit may include: the first control module and the pushing arm drive motor;

the first control module can be connected with the ground system through a cable and an internal bus of the underground backup device, receives a control command sent by the ground system, and generates control instructions of the plurality of backup arm driving motors according to the control command;

the pushing arm driving motor is connected with the pushing arms and can be used for driving the pushing arms to be opened and closed according to the control command.

In an exemplary embodiment of the present application, the pushing unit may further include: the second control module is connected with the first control module;

the second control module is respectively connected with the plurality of pushing arms through a plurality of groups of linkage rods and pull rod potentiometers which are connected with each other, can be used for detecting the pressure transmitted by the pushing arm corresponding to each linkage rod through each linkage rod, and sends the pressure to the first control module through an internal bus;

the first control module may be further configured to transmit the pressure to the surface system.

In an exemplary embodiment of the present application, the pushing unit may further include: the third control module is connected with the first control module;

the third control module is connected with each pull rod potentiometer and can be used for calculating the opening size of the pushing arm corresponding to each pull rod potentiometer according to the resistance value of each pull rod potentiometer and calculating the well diameter according to the opening sizes of the pushing arms; sending the well diameter to the first control module through an internal bus; wherein, the resistance value of each pull rod potentiometer is in direct proportion linear relation with the opening size change of the corresponding push arm;

the first control module may also be configured to transmit the caliper to the surface system.

In an exemplary embodiment of the present application, the control command may include a fishing command;

the first control module can be further used for controlling the pushing arm driving motor to drive the plurality of pushing arms to be opened according to the fishing command, and measuring the well diameter in real time to serve as reference data in the fishing process;

the downhole sidewall contact further comprises a fishing unit; the fishing unit is connected with the surface system and used for fishing the tools falling into the well under the command and the coordination of the surface system.

In an exemplary embodiment of the present application, the fishing unit may include: the fourth control module and the mechanical gripper;

and the fourth control module is connected with the mechanical hand grab and can be used for controlling the opening or closing of the mechanical hand grab according to the fishing command so as to realize the grasping or releasing of the fished tool.

In an exemplary embodiment of the present application, the fourth control module controlling the opening or closing of the mechanical gripper during fishing may include:

after the ground system sends the fishing command, controlling the mechanical gripper to be opened to a maximum opening angle;

after the ground system lowers the underground backup device to the bottom end of the underground backup device to be contacted with the salvaged tool, the mechanical hand grip is controlled to be closed, so that the mechanical hand grip is contacted with the shell of the salvaged tool and is embedded into the joint groove of the salvaged tool to grip the salvaged tool.

In an exemplary embodiment of the present application, the fishing unit may further include: an electromagnet; the electromagnet is arranged below the fourth control module;

the fourth control module is electrically connected with the electromagnet and can be used for electrifying a coil of the electromagnet according to an electromagnet electrifying instruction issued by the ground system after the mechanical gripper grabs the salvaged tool;

the electromagnet can be used for generating magnetism after being electrified on the coil so as to adsorb the salvaged appliance.

In an exemplary embodiment of the present application, the tool of the surface system cooperating with the fishing unit to fish a dropped well may comprise:

after the mechanical hand is in contact with the shell of the tool to be salvaged, in the process that the underground backup device is lifted by the ground system, whether the mechanical hand is successfully embedded into the joint groove of the tool to be salvaged is judged by monitoring the change of the lifting force value of the mechanical hand collected in real time in the fourth control module; judging whether the mechanical gripper is closed in place or not according to the change of the power supply current of the ground system;

when the lifting force value of the mechanical hand grip is gradually increased to a numerical value and is stabilized at the numerical value, the mechanical hand grip is judged to be successfully embedded into the joint groove of the salvaged tool; when the power supply current on the surface system is stable it is determined that the mechanical gripper has closed into position and has gripped the tool being fished.

In an exemplary embodiment of the present application, the downhole sidewall contact may further comprise an anti-drop system; the anti-falling system comprises the pushing unit and a telescopic block; the telescopic block can be arranged on the side surface of the second control module and is connected with a rotating motor in the second control module;

the second control module can also be used for judging that the underground sidewall contact device is in a falling state according to the detected pull-down force of the linkage rod, and controlling the rotating motor to start, so that the telescopic block is driven by the rotating motor to extend outwards and contact with the well wall, wherein, along with the continuation of the falling state, the contact tightness between the telescopic block and the well wall is increased.

In an exemplary embodiment of the application, the first control module may be further configured to control the backup arm driving motor to start to drive one or more backup arms to open through the backup arm driving motor when the second control module determines that the downhole backup is in a falling state, so as to assist in preventing the downhole backup from falling through resistance between the backup arms and a well wall.

In an exemplary embodiment of the present application, a front end of each of the push arms may be provided with a wear-resistant block.

Compared with the related art, the downhole sidewall contact device of the embodiment of the application can comprise: a plurality of backup arms and backup units; the plurality of backup arms are connected with the backup units; the pushing unit can be connected with a ground system; the pushing unit can be used for controlling the opening or closing of any one or more pushing arms, calculating the hole diameter according to the opening size of the pushing arms, collecting the pressure transmitted by the pushing arms in real time, and transmitting the hole diameter and the pressure to the ground system. Through the scheme of the embodiment, the ground real-time control and the real-time monitoring of the pushing parameters are realized, the flexible control of the pushing arm is realized, and the pushing arm has good control characteristics and practicability.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.

Drawings

The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.

FIG. 1 is a block diagram of a downhole sidewall contact assembly according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a downhole sidewall contact device according to an embodiment of the application.

Detailed Description

The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with or instead of any other feature or element in any other embodiment, unless expressly limited otherwise.

The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not limited except as by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.

The embodiment of the application provides a downhole sidewall contact device A, as shown in fig. 1 and 2, which may include: a plurality of backup arms 11 and a backup unit 1; the plurality of backup arms 11 are connected to the backup unit 1; the pushing unit 1 can be connected with a ground system 3;

the pushing unit 1 can be used for controlling the opening or closing of any one or more pushing arms 11, calculating the hole diameter according to the opening size of the pushing arms 11, collecting the pressure transmitted by the pushing arms 11 in real time, and transmitting the hole diameter and the pressure to the ground system 3.

In the exemplary embodiment of the application, the multifunctional intelligent sidewall contact device with a novel structure is provided, the ground real-time control can be realized when the multifunctional intelligent sidewall contact device enters a borehole 9 in a stratum B for operation, the current borehole diameter curve quality and the pressure of a backup arm can be monitored, and the state of the sidewall contact device can be reminded for ground operators in real time; the control function of independent leg opening and combined leg opening can be realized for the backup arm, the backup arm has the function of unfreezing the backup device, and the backup arm has good control characteristics and practicability.

In the exemplary embodiment of the application, as shown in fig. 2, the multifunctional intelligent sidewall contact device can be connected through a cable 6, so that the ground system 3 in the ground test cart 5 can effectively supply power to the multifunctional intelligent sidewall contact device through the cable 6, and meanwhile, the communication and real-time control between the ground system 3 and the multifunctional intelligent sidewall contact device can be ensured in time.

In the exemplary embodiment of the present application, the multifunctional intelligent sidewall contact device with the novel structure is described in detail below.

In an exemplary embodiment of the present application, the pushing unit 1 may include: a first control module 12 (or called a well wall control module) and a pushing arm driving motor 13;

the first control module 12 may be connected to the surface system 3 through a cable 6 and an internal bus of the downhole sidewall contact device, receive a control command sent by the surface system 3, and generate control instructions of the plurality of backup arm driving motors 13 according to the control command;

the armrest driving motor 13 is connected to the plurality of armrest arms 11, and may be configured to drive the plurality of armrest arms 11 to open and close according to the control instruction.

In an exemplary embodiment of the present application, the first control module 12 is connected to the armrest driving motor 13 through an internal bus of an instrument, so that the first control module 12 supplies power to the armrest driving motor 13 and transmits a control command, when the first control module 12 receives a command issued by the ground system 3 through a cable and requests to open or close a certain armrest 11, the first control module 12 sends a related command to the corresponding armrest driving motor 13 through the internal bus, and the armrest driving motor 13 controls opening and closing of the armrest 11 according to the command issued by the ground system 3, where a certain armrest 11 may be opened or closed independently, or a plurality of armrests 11 may be opened or closed simultaneously.

In an exemplary embodiment of the present application, a front end of each of the push arms may be provided with a wear block 18.

In the exemplary embodiment of the present application, the front end of the backup arm 11 is designed with a wear-resistant block 18 to reduce the friction loss between the backup arm 11 and the borehole wall 7, and the wear-resistant block 18 may be made of a tungsten-nickel alloy material to ensure hardness and wear resistance.

In an exemplary embodiment of the present application, the pushing unit 1 may further include: a second control module 14 (or pressure detection and rotation motor control module) connected to the first control module 12;

the second control module 14 is connected to the plurality of push arms 11 through a plurality of groups of linkage rods 15 and pull rod potentiometers 16 which are connected to each other, and can be used for detecting pressure transmitted by the push arm 11 corresponding to each linkage rod 15 through each linkage rod 15 and sending the pressure to the first control module 12 through an internal bus;

the first control module 12 may also be configured to transmit the pressure to the surface system 3.

In an exemplary embodiment of the present application, the linkage rod 15 is connected to the second control module 14, and a pressure sensor may be disposed in the second control module 14, and the pressure sensor may monitor the pressure of the leaning arm transmitted by the linkage rod 15 in real time, so as to perform real-time pressure value collection.

In an exemplary embodiment of the present application, the pushing unit 1 may further include: a third control module 17 (or caliper module) connected to the first control module 12;

the third control module 17 is connected with each pull rod potentiometer 16 and can be used for calculating the opening size of the pushing arm 11 corresponding to each pull rod potentiometer 16 according to the resistance value of each pull rod potentiometer 16 and calculating the well diameter according to the opening sizes of a plurality of pushing arms 11; and sends the hole diameter to the first control module 12 via an internal bus; wherein, the resistance value of each pull rod potentiometer 16 is in direct proportion linear relation with the opening size change of the corresponding push arm 11;

the first control module 12 may also be configured to transmit the hole diameter to the surface system 3.

In the exemplary embodiment of the present application, the third control module 17 is connected to the pull rod potentiometer 16, and when the push arm 11 is opened and closed, the pull rod potentiometer 16 and the linkage rod 15 may be driven to move, where a resistance value of the pull rod potentiometer 16 and a change in an opening size of the push arm 11 are in a direct linear relationship, and the third control module 17 directly measures the resistance value of the pull rod potentiometer 16, so as to obtain the opening size of the current push arm 11 in real time, and finally obtain a current well diameter value by calculating the opening sizes of a plurality (e.g., three) push arms 11, so as to provide a well diameter reference for a well depth where the current instrument is located.

In an exemplary embodiment of the present application, the second control module 14 and the third control module 17 respectively transmit the pressure value and the hole diameter value of the backup arm 11, which are acquired in real time, to the first control module 12 through an instrument bus (internal bus), and the first control module 12 may pack the backup parameters (the pressure value and the hole diameter value) and transmit the packed backup parameters back to the surface system 3 through the instrument bus and a cable, and may display the pressure and the hole diameter transmitted by the backup arm 11 in real time through the surface system 3.

In the exemplary embodiment of the application, the underground backup device can be used for independently descending a well or descending the well in combination with other instruments through the functions, so that the functions of real-time measurement of the diameter of the underground well, backup pressure monitoring and the like are realized, meanwhile, the pushing control of the instruments in different directions underground can be realized through the independent control of the backup arms 11, the functions of pushing and releasing the clamp when the underground backup device is easily clamped by mud in a well are effectively solved, and the existing backup device cannot independently realize the independent control of the backup arms 11 at present.

In an exemplary embodiment of the present application, the control command may include a fishing command;

the first control module 12 may be further configured to control the backup arm driving motor 13 to drive the plurality of backup arms 11 to open according to the fishing command, and measure the well diameter in real time as reference data in a fishing process;

the downhole sidewall contact device further comprises a fishing unit 2; the fishing unit 2 may be used to fish a tool 4 that is dropped into the well under the command and coordination of the surface system 3.

In an exemplary embodiment of the present application, the fishing unit 2 may include: a fourth control module 21 (which may be referred to as an electromagnet and mechanical gripper control module) and a mechanical gripper 22;

the fourth control module 21, connected to the mechanical gripper 22, may be configured to control the opening or closing of the mechanical gripper 22 according to the fishing command, so as to grasp or release the tool 4 to be fished (i.e. the tool that is dropped into the well).

In an exemplary embodiment of the present application, the fourth control module 21 controlling the opening or closing of the mechanical gripper 22 during fishing may include:

after the fishing command is sent out by the surface system 3, the mechanical gripper 22 is controlled to be opened to the maximum opening angle;

after the surface system 3 lowers the downhole backup tool to the bottom end of the downhole backup tool to contact the tool 4 to be fished, the mechanical gripper 22 is controlled to close, so that the mechanical gripper 22 contacts the casing of the tool 4 to be fished and is embedded into the connector groove 41 of the tool 4 to be fished (i.e. the groove 41 at the tool connector 42 on the tool 4 to be fished), and the tool 4 to be fished is gripped.

In the exemplary embodiment of the application, the fourth control module 21, the mechanical gripper 22 and the electromagnet 23 in the downhole sidewall contact device are characteristic innovative functions of the downhole sidewall contact device, and can realize the fishing function of the downhole sidewall contact device.

In an exemplary embodiment of the present application, the new fishing function provided by the instrument is described as follows: the ground system 3 can send a power supply and a communication command of the ground to the first control module 12 through the cable 6 and a bus inside the multifunctional intelligent sidewall contact device to control the opening and closing operations of the backup arm 11 of the multifunctional intelligent sidewall contact device, when salvaging needs to be realized by means of the underground sidewall contact device, the ground system 3 sends a command to control the first control module 12 to drive the backup arm driving motor 13 to rotate so as to drive the backup arm 11 to open, and the information of the current borehole diameter value detected by the backup arm 11 is obtained in real time through measuring the resistance value of the pull rod potentiometer 16 by the third control module 17, so that real-time borehole diameter data reference is provided for the salvaging process.

In an exemplary embodiment of the present application, the fourth control module 21 may control the opening and closing of the mechanical gripper 22, and meanwhile, a mechanical gripper tension sensor may be disposed inside the fourth control module 21, so as to measure a tension value borne by the mechanical gripper 22 in real time. After a tool is dropped into a well, the multifunctional intelligent push ram can be lowered to the position of a tool 4 to be salvaged in the well through the cable 6, an instruction is sent out through the control of the ground system 3, the instruction is sent to the fourth control module 21 through the cable 6 and the internal bus of the multifunctional intelligent push ram, the fourth control module 21 can control the opening and closing operation of the mechanical gripper 22 according to the received instruction, the mechanical gripper 22 can be opened to the maximum, as drawn by the dotted line at the position of the mechanical gripper 22 in fig. 2, the push ram can be lowered to be in contact with the top of the tool 4 to be salvaged, then the instruction is sent out to close the mechanical gripper 22, and the mechanical gripper 22 is ensured to be in contact with the shell of the tool 4 to be salvaged at the moment.

In an exemplary embodiment of the present application, the tool 4 for fishing a dropped well by the surface system 3 in cooperation with the fishing unit 2 may include:

after the mechanical hand 22 is contacted with the shell of the tool 4 to be salvaged, in the process that the ground system 3 lifts the underground pusher, whether the mechanical hand 22 is successfully embedded into the joint groove 41 of the tool 4 to be salvaged is judged by monitoring the change of the lifting force value of the mechanical hand 22 collected in real time in the fourth control module 21; and judges whether the mechanical gripper 22 is closed in place or not through the change of the power supply current of the ground system 3;

wherein, when the lifting force value of the mechanical gripper 22 gradually increases to a value and is stabilized at the value, the mechanical gripper 22 is judged to be successfully embedded into the joint groove 41 of the salvaged tool 4; when the power supply current on the surface system 3 has stabilised it is determined that the mechanical gripper 22 has closed into position, gripping the tool 4 being fished.

In the exemplary embodiment of the present application, during the closing process of the mechanical gripper 22, whether the mechanical gripper 22 is in contact with the outer shell of the fishing tool 4 can be determined by determining whether the ground power supply current changes to a stable state, the multifunctional intelligent sidewall contact device is lifted while the mechanical gripper 22 is closed, the ground system 3 can determine whether the mechanical gripper 22 is successfully inserted into the joint groove 41 of the fishing tool 4 by monitoring the change of the pulling force value on the mechanical gripper 22 collected in real time in the fourth control module 21, if the pulling force value on the uploaded mechanical gripper 22 is significantly increased, it is determined that the mechanical gripper 22 is successfully inserted into the joint groove 41 of the fishing tool 4, at this time, it can be determined whether the mechanical gripper 22 is already closed in place by the change of the ground system 3 power supply current, it is determined that the mechanical gripper 22 is already closed in place after the power supply current on the ground system 3 is stable, illustrating that the mechanical gripper 22 of the multi-function intelligent pusher has firmly gripped the fishing tool 4 at this time.

In an exemplary embodiment of the present application, the fishing unit 2 may further include: an electromagnet 23; the electromagnet 23 may be disposed below the fourth control module 21;

the fourth control module 21 may be electrically connected to the electromagnet 23, and may be configured to power up a coil of the electromagnet 23 according to a power-up instruction of the electromagnet 23 issued by the ground system 3 after the mechanical gripper 22 grips the salvaged tool 4;

the electromagnet 23 can be used for generating magnetism after the coil is electrified so as to adsorb the tool 4 to be fished.

In the exemplary embodiment of the present application, after it is determined that the mechanical gripper 22 has firmly gripped the salvaged tool 4, the surface system 3 may issue another instruction to the fourth control module 21, and control the output current to the coil on the electromagnet 23 in time, so as to ensure that the electromagnet 23 works effectively and strongly grips the salvaged tool 4. So far, the salvaged tool 4 is fixed by the multifunctional intelligent sidewall contact device through two ways of mechanical grab 22 and electromagnet 23 adsorption, so that the fixation is ensured firmly in a double-insurance mode, and then the salvaged tool is lifted to the wellhead through the cable 6 to complete the salvage work.

In an exemplary embodiment of the present application, the downhole sidewall contact may further comprise an anti-drop system; the fall prevention system may comprise the pushing unit 1 and a telescoping block 8; the telescopic block 8 can be arranged on the side surface of the second control module 14 and is connected with a rotating motor in the second control module 14;

the second control module 14 may be further configured to determine that the downhole sidewall contact device is in a falling state according to the detected pulling force of the linkage rod 15, and control the rotating motor to start, so that the rotating motor drives the telescopic block 8 to extend outwards and contact with the well wall 7, wherein the contact tightness between the telescopic block 8 and the well wall 7 is increased along with the continuation of the falling state.

In an exemplary embodiment of the present application, the first control module 12 may be further configured to control the backup arm driving motor 13 to start to drive one or more backup arms 11 to open through the backup arm driving motor 13 when the second control module 14 determines that the downhole backup is in a falling state, so as to assist in preventing the downhole backup from falling through the resistance between the backup arms 11 and the well wall 7.

In an exemplary embodiment of the application, the downhole sidewall contact device provides a new function for ensuring the safety of the salvage and lifting process, for example, in the salvage and lifting process, the surface system 3 may issue a command to the first control module 12 to open the backup arm 11, and simultaneously, the open size of the backup arm 11 is collected and processed in real time through the third control module 17, so as to obtain the downhole diameter value in the salvage process in real time, and know the downhole diameter value condition. The front end of the leaning arm 11 can be provided with a wear-resistant block 18 to reduce the friction loss between the leaning arm 11 and the well wall 7, and the wear-resistant block 18 can be made of tungsten-nickel alloy materials to ensure the hardness and the wear resistance.

In the exemplary embodiment of the application, the pushing arm 11 is connected with the corresponding pull rod potentiometer 16 and the linkage rod 15 to realize linkage in the multifunctional intelligent sidewall contact device, the linkage rod 15 and the second control module 14 will work in coordination and cooperation to play a role of preventing the instrument from falling into the well, if the multifunctional intelligent sidewall contact device falls down, the pushing arm 11 can rub against the well wall 7 to generate an upward friction force to drive the linkage rod 15 to move downward, the second control module 14 can be connected with the linkage rod 15 through a pressure sensor to sense and collect the pulling force or pressure applied to the linkage rod 15, so as to determine whether the linkage rod 15 moves upward or downward, at this time, if the sidewall contact device falls down, the second control module 14 will sense the downward movement of the linkage rod 15, and simultaneously, the motor in the second control module 14 is started to work to drive the telescopic block 8 to extend outward, when the multifunctional intelligent sidewall contact device falls down, the sidewall contact arm 11 drives the connected internal linkage rod 15 to move down, the second control module 14 senses the movement and starts an internal motor to operate so as to drive the telescopic block 8 to extend out, the internal linkage rod 15 continuously moves down along with the falling process of the multifunctional intelligent sidewall contact device, the telescopic block 8 is in contact with the well wall 7 and is closer and closer until the multifunctional intelligent sidewall contact device is completely blocked, the multifunctional intelligent sidewall contact device is prevented from continuously falling, meanwhile, the sidewall contact arm 11 also has a transverse opening process in the falling process, and therefore the multifunctional intelligent sidewall contact device is prevented from being blocked in an auxiliary mode, the instrument is prevented from falling into the well, and the risk that the sidewall contact device falls down through two acting forces of the sidewall contact arm 11 and the telescopic block 8 is avoided.

In the exemplary embodiment of the present application, the expansion block 8 may also be made of a tungsten-nickel alloy material, ensuring hardness and wear resistance.

In the exemplary embodiment of the application, after the cable 6 drives the multifunctional intelligent sidewall contact device to lift, the backup arm 11 will restore to the initial open state, the internal linkage rod 15 will move upward, at this time, the second control module 14 will sense the direction of the movement, and control the internal motor of the second control module 14 to operate to contract the telescopic block 8 toward the center direction of the sidewall contact device until the internal linkage rod stops 15 to stop moving, thereby ensuring that the telescopic block 8 is separated from the well wall 7, avoiding lifting and blocking, and ensuring that the fishing process can be smoothly lifted. Therefore, the multifunctional intelligent sidewall contact device has the functions of smoothly lifting and salvaging and preventing self from falling down and falling into the well. After the multifunctional intelligent sidewall contact device is successfully lifted out of a wellhead by the fishing tool 4, the chuck can be installed to clamp the fishing tool 4, meanwhile, the ground system 3 can send an instruction to the first control module 12 to close the leaning arm 11, send an instruction to the fourth control module 21, cut off the power supply of the electromagnet 23, finish the adsorption of the electromagnet 23, send an instruction to open the mechanical gripper 22, and finish the whole fishing process.

In the exemplary embodiment of this application, this application has mainly proposed the multi-functional intelligent sidewall contact device of a new and novel structure, has realized ground real time control, and current well diameter curve quality and sidewall contact device arm pressure are monitored simultaneously, can realize opening the leg alone and make up the leg control function to the wall contact device, and possess the instrument and unfreeze and prevent the well function from the screens, have fine control characteristic and good be the practicality. The fixed salvage mode of the fixed dual fail-safe of machinery tongs 22 can be considered simultaneously to realize that electro-magnet 23 adsorbs in salvaging the instrument in-process, possesses motor drive simultaneously and prevents falling the well function from the screens. The hole diameter curve and the pressure of the sidewall contact arm are monitored in real time during fishing, real-time hole diameter and sidewall contact pressure information is provided for ground fishing control, and operation safety is greatly improved.

It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.