A heat preservation and pressure maintaining system capable of realizing square cutting of a core

Abstract

The application discloses a heat and pressure maintaining system capable of realizing square cutting of a core, which is composed of a hydraulic driving gas pressurizing device, a core butt joint transfer cabin, a core circumferential cutting cabin, a core turning cabin, a core axial cutting cabin, a core rotation return cabin, a high-temperature and high-pressure resistant electromagnetic ball valve and a high-temperature and high-pressure resistant connecting flange. The butt joint transfer cabin adopts a double-piston air pressure structure, and the hydraulic driving gas pressurizing device can accurately ensure the accurate control of the pressure of the core during the process of being transferred from a sampler to the heat and pressure maintaining system for square cutting of the core. Under the action of the pressure difference, the transferred core moves to the core circumferential cutting cabin to complete the cutting operation. After the cutting operation, the core reaches the core axial cutting cabin through the core turning cabin to perform square cutting work and cooperate with the core rotation return cabin to finally realize the processing of the square columnar core. The high-temperature and high-pressure resistant electromagnetic ball valve is used for closed-loop control in each movement stage of the core to ensure the stability of the environmental pressure and temperature of the core. The high-temperature and high-pressure resistant connecting flange is used for quick connection of the sampler, the butt joint transfer cabin and the cutting system. In the application, the core circumferential cutting cabin can realize multi-length fixed-length cutting of the heat and pressure maintaining core, and the core axial cutting cabin and the core rotation return cabin can realize square cutting of the heat and pressure maintaining core, thereby making up for the defects that the prior art cannot realize square cutting of the core.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of core sampling processing, and particularly relates to a heat and pressure maintaining system capable of realizing square cutting of a core. BACKGROUND

[0002] With the increasing depth of resource exploitation, the development state of high ground stress, high ground temperature and high permeation pressure gradually emerges. At this time, the basic parameters and laws of rock mass mechanics summarized in shallow resource development are no longer applicable. Related scholars have conducted research to verify the differences in the mechanical properties of deep and shallow exploitation rock masses. With more and more scholars paying attention to deep rock mass mechanics and conducting research on it, the method of conducting basic theoretical research on rock mass mechanics based on ordinary drilling cores is no longer applicable. Some scholars have proposed to take land cores with heat and pressure maintaining, mainly because this technology can ensure that the extracted core always maintains the original pressure and temperature state of the formation. The physical properties of the core under this condition will not be damaged due to pressure release, and the fluid in the core will not evaporate and lose due to changes in temperature and pressure. Related scholars first transplanted the gas hydrate coring technology and continuously improved it, gradually making breakthroughs in land coring research. They also proposed a forward-looking research approach of "five-protection" coring. With the increasing perfection of land coring technology and devices, scholars further proposed to conduct research on heat and pressure maintaining core processing technology.

[0003] After the heat and pressure maintaining core is taken out, it still needs to be processed with professional heat and pressure maintaining to ensure that the core sample can maintain its original state in the formation during subsequent analysis and research. The existing heat and pressure maintaining processing technology has relatively mature level, but still needs to be continuously developed and improved. At present, there are many technologies that can realize the heat and pressure maintaining processing of cores. These technologies cover all aspects from sampling, on-site analysis, transportation to laboratory analysis. For example, during the sampling stage, special sampling tools and techniques can be used to minimize the temperature and pressure changes of the core during the extraction process. In the on-site core testing and analysis, the long core section in the heat and pressure maintaining transfer device is cut into short core sections that meet the length requirements of the testing and analysis, and then the basic parameters of the core are obtained through non-destructive testing technology. During transportation, special heat and pressure maintaining containers are used to effectively maintain the temperature and pressure stability of the core. In the laboratory analysis stage, a series of technologies and equipment are used to ensure that the temperature and pressure conditions of the core during the transfer to the indoor mechanical analysis testing system are accurately controlled.

[0004] However, although the existing heat and pressure maintaining processing technology has relatively mature level, there are still some technical drawbacks, such as:

[0005] (1) the prior art by mechanical gripper to grab the plastic sleeve wrapped around the core and other ways to achieve the movement of the core in the whole heat preservation and pressure transfer system, if the core square cutting cabin design continues to use this technology will lead to the outer covering material to the core lateral cutting obstacles, while the destruction of the outer covering material will cause the core cutting processing precision reduction, broken down material pollution cabin and other drawbacks.

[0006] (2) the prior art currently involved in the cutting process only in nondestructive testing and analysis link, the link cutting core purpose is only to change the length of the core, so the core in the indoor mechanical analysis test can at most be a false triaxial mechanical test, however, the real rock stress situation is true triaxial state, especially in the deep environment can not use the existing shallow law of the case, need to carry out rock true triaxial test can better study the characteristics of deep rock mass, the existing true triaxial experiment needs cubic rock core sample rather than cylindrical rock core.

[0007] Therefore, in order to realize the heat preservation and pressure core can be processed into the shape required by the true triaxial testing machine, ensure the objectivity of deep rock mass mechanics experiment, need to invent a kind of heat preservation and pressure system that can realize the square cutting of core, solve the problem of existing technology grabbing mechanism is not applicable and processing cutting form blank. SUMMARY

[0008] The purpose of the present application is to make up for the blank of the prior art, and a kind of heat preservation and pressure system that can realize the square cutting of core is provided, which solves the problem that the prior art only cuts the heat preservation and pressure core in the circumferential direction, ignores the requirement of square column sample shape for subsequent true triaxial mechanics test of heat preservation and pressure core, and lacks the function of square cutting of core;The present application controls the movement of the core in the system by pressure difference, avoids the problem that the traditional heat preservation and pressure transfer system uses mechanical gripper to grab the core liner, which causes the movement of the core to be blocked due to the damage of the liner in the subsequent square cutting of core, and realizes the square cutting function of fixed length core by adding core axial cutting cabin, finally realizes the processing function of square column core.

[0009] To solve the above technical problems, the present application specifically provides the following technical scheme: a kind of heat preservation and pressure system that can realize the square cutting of core, with:

[0010] Hydraulic drive gas pressurizing device, set up with core docking transfer cabin, core circumferential cutting cabin and core return cabin are connected, the hydraulic drive gas pressurizing device provides power for the movement of the core in the system, while ensuring that the core is in a constant pressure state in the system;

[0011] The core docking transfer cabin is arranged at the end of the hydraulic drive gas pressurizing device, and is used for receiving the heat-preserved and pressure-maintained core sampled by the sampler and providing the same temperature and pressure environment as the sampler for temporarily storing the core.

[0012] The core circumferential cutting cabin is arranged at the downstream end of the core docking transfer cabin, and is used for measuring the length of the required core and performing circumferential cutting of the core according to the length.

[0013] The core turning cabin is arranged at the downstream end of the core circumferential cutting cabin, and is used for turning the direction of the core after the length cutting in the core circumferential cutting cabin, so as to create conditions for axial cutting of the core.

[0014] The core axial cutting cabin is arranged at the downstream end of the core turning cabin and connected with the upstream section of the core rotation return cabin, and is used for cutting the axial surface of the core with the required length, so as to process the cylindrical core into a square column.

[0015] The core rotation return cabin is arranged downstream of the core axial cutting cabin, and is used for rotating the non-standard square column core after the first cutting in the core axial cutting cabin by 90° around the central axis, and then sending the core back to the core axial cutting cabin for the second cutting, so as to finally form a standard square column core.

[0016] The high-temperature and high-pressure electromagnetic ball valve is arranged at the downstream end of the core docking transfer cabin and at the upstream and downstream ends of the core circumferential cutting cabin, the core turning cabin and the core axial cutting cabin, and is used for controlling the opening and closing of each cabin to ensure the pressure stability of the cabin being operated.

[0017] The high-temperature and high-pressure connecting flange is arranged at the downstream side of the high-temperature and high-pressure electromagnetic ball valve at the downstream end of the core docking transfer cabin, and is connected with the upstream side of the high-temperature and high-pressure electromagnetic ball valve at the upstream end of the core circumferential cutting cabin to form an integrated whole, and is used for connecting the heat-preservation and pressure-maintenance cutting function end and the docking transfer end of the system, and serving as the only outlet of the system connected with the outside.

[0018] Further, the heat-preservation and pressure-maintenance system for square cutting of a core is characterized in that the upstream end of the core docking transfer cabin is connected with the downstream end of the hydraulic drive gas pressurizing device through a high-pressure gas transfer port, the core docking transfer cabin is provided with a gas pressure piston rod, an O-shaped gas pressure piston, a driven convex link piston, a piston rod air inlet, a driven piston limiting slot, a driven piston air flow channel, an O-shaped piston sealing element, a driven piston bottom limiting block, a driven piston sealing element and a driven piston front end heating head, a core docking cabin annular heating element and a core docking cabin heat preservation layer.

[0019] The driven convex link piston is arranged at the downstream end of the O-shaped pneumatic piston, and the driven convex link piston and the O-shaped pneumatic piston move under the action of the pressure difference relying on the pneumatic piston rod arranged at the upstream end of the core butt joint transfer cabin.

[0020] The downstream end of the pneumatic piston rod is provided with a piston rod air inlet channel, when the O-shaped pneumatic piston moves to the maximum stroke, the forward movement is stopped, the high-pressure gas is provided to the driven convex link piston through the piston rod air inlet channel and the driven piston air flow channel to drive the movement of the driven convex link piston;

[0021] The driven piston front end heating head is arranged at the downstream end of the driven convex link piston, and heats the end surface of the core temporarily stored in the core butt joint transfer cabin, the peripheral surface of the core is heated by the core butt joint cabin annular heating member, and the core butt joint cabin annular heating member is covered with a core butt joint cabin heat preservation layer.

[0022] Further, a heat preservation and pressure maintaining system capable of realizing square cutting of a core is characterized in that the O-shaped pneumatic piston is provided with an O-shaped piston sealing member to ensure good air tightness during movement of the O-shaped pneumatic piston.

[0023] The driven convex link piston is provided with a driven piston bottom end limiting block and a driven piston sealing member, the driven piston bottom end limiting block is arranged at the upstream end of the driven convex link piston, cooperates with the driven piston limiting slot to prevent the driven convex link piston from moving forward, the driven piston limiting slot is arranged at the downstream end of the pneumatic piston rod, and the driven piston sealing member ensures good air tightness during movement of the driven convex link piston.

[0024] Further, a heat preservation and pressure maintaining system capable of realizing square cutting of a core is characterized in that the upstream end of the high-temperature and high-pressure resistant electromagnetic ball valve arranged at the upstream end of the core peripheral cutting cabin is connected with the downstream end of the core butt joint transfer cabin through a high-temperature and high-pressure resistant connecting flange, the core peripheral cutting cabin is provided with a peripheral cutter with a chip guide channel, a flip type axial laser receiver, a variable range walking guide rail of the laser receiver, a laser generator and a laser receiver storage groove.

[0025] The peripheral cutter with the chip guide channel is arranged on the movement guide rail at the bottom of the peripheral cutter disc in the middle of the core peripheral cutting cabin, and cooperates with the annular safety guide rail of the cutter disc assembly to perform the peripheral core cutting work.

[0026] The flip axial laser receiver is arranged below the circumferential cutter with the chip guide channel in the initial state, and both are in the same plane. When the core contacts the flip axial laser receiver, the laser generator starts to emit the ranging laser. The moving core pushes the flip axial laser receiver to move forward on the laser receiver variable range walking guide rail. When the preset distance is reached, the axial laser receiver locking valve locks the flip axial laser receiver, the flip axial laser receiver is turned over in the laser receiver receiving groove, the laser generator stops emitting, and the circumferential cutter with the chip guide channel starts to perform circumferential cutting work.

[0027] Further, a heat preservation and pressure maintaining system capable of achieving square cutting of a core is characterized in that the circumferential cutter with the chip guide channel is provided with a circumferential cutter bottom movement motor, a circumferential cutter fixed base and a circumferential cutter depth movement mechanism. The circumferential cutter fixed base is arranged on the upper end of the circumferential cutter depth movement mechanism to ensure the stability of the cutter. The circumferential cutter depth movement mechanism drives the circumferential cutter with the chip guide channel to continuously penetrate into the core inside during circumferential cutting. The circumferential cutter bottom movement motor is arranged on the lower end of the circumferential cutter depth movement mechanism to provide walking power for the circumferential cutter with the chip guide channel.

[0028] The laser receiver locking valve is arranged on the laser receiver variable range walking guide rail and in front of the laser generator. The laser generator is arranged in the laser receiver receiving groove and at the rear end of the core circumferential cutting cabin.

[0029] Further, a heat preservation and pressure maintaining system capable of achieving square cutting of a core is characterized in that the core turning cabin is provided with a turning transmission gear, a turning transmission motor, a turning driven gear, a spherical core turning chamber and a spherical turning chamber annular heating element. The spherical core turning chamber is arranged in the middle of the core turning cabin. The turning driven gear arranged at the center of the upper and lower ends of the spherical core turning chamber completes the turning of the core with the length. The turning driven gear provides power to the turning transmission gear through the turning transmission motor to complete the turning action. The spherical turning chamber annular heating element is coated on the inner wall of the spherical core turning chamber to heat the core with the length.

[0030] Further, a heat preservation and pressure maintaining system for square cutting of a core, characterized in that the core axial cutting cabin is provided with an axial cutter with a chip guide channel, an axial cutting cabin heating element, a core hoop fastening mechanism, a bottom-unloading excess material recycling chamber and a core axial limiting mechanism, the core axial limiting mechanism is arranged downstream of the core axial cutting cabin, starts to rise when a core enters the core axial cutting cabin, limits the forward movement of the core, then the core hoop fastening mechanism locks the core, the axial cutter with a chip guide channel starts to cut the lateral curved surface of the core along the axial direction of the core at the same time, after the cutting is completed, the core hoop fastening mechanism and the core axial limiting mechanism are unlocked in sequence, the core is pushed into the core rotation return cabin, and the cuttings enter the bottom-unloading excess material recycling chamber.

[0031] The axial cutter with a chip guide channel is arranged on the arc-shaped cutter frame and moves axially along the axial movement guide rail of the arc-shaped cutter frame, and the bottom of the arc-shaped cutter frame is provided with an arc-shaped axial cutter frame transverse movement motor to provide power for the arc-shaped axial cutter frame.

[0032] The axial cutting cabin heating element is arranged on the inner wall of the core axial cutting cabin to heat the core.

[0033] Further, a heat preservation and pressure maintaining system for square cutting of a core, characterized in that the arc-shaped cutter frame is arranged at the upstream end of the core axial cutting cabin, the axial movement guide rail of the arc-shaped cutter frame penetrates through the entire core axial cutting cabin, the axial cutter depth movement mechanism is arranged at the bottom of the axial cutter with a chip guide channel to provide power for the axial cutter to penetrate into the core, the core hoop fastening mechanism is arranged on the inner wall of the core axial cutting cabin and is arranged in a spaced manner with the axial cutting cabin heating element, and the bottom-unloading excess material recycling chamber is arranged upstream of the core axial limiting mechanism.

[0034] Further, a heat preservation and pressure maintaining system for square cutting of a core, characterized in that the core rotation return cabin is provided with a core rotation sleeve, a rotation sleeve rotation motor, a rotation sleeve hoop heating element, a rotation sleeve bottom heating element and a rotation sleeve gas channel, the end of the core rotation return cabin is connected with the upstream end of a hydraulic drive gas pressurizing device through a high-pressure gas transfer interface, the core rotation sleeve is arranged at the upper end of the rotation sleeve rotation motor, the rotation sleeve hoop heating element is arranged on the inner wall of the core rotation sleeve, and the rotation sleeve bottom heating element is arranged at the bottom of the core rotation sleeve, and the rotation sleeve gas channel is arranged at the end of the core rotation return cabin and penetrates through the core rotation sleeve, when a core that has been subjected to first axial cutting needs to be returned from the core rotation return cabin to the core axial cutting cabin for second cutting, high-pressure gas pushes the core to the core axial cutting cabin through the rotation sleeve gas channel.

[0035] Further, a core heat preservation and pressure maintaining transfer and storage multifunctional device, characterized in that it comprises the following steps:

[0036] ① Core sampler docking process, the specific steps are as follows:

[0037] The outlet end of the core sampler is connected to the core docking transfer cabin through a high-temperature and high-pressure connection flange, a movable hydraulic drive gas booster device is connected to the other end of the core sampler, then the hydraulic drive gas booster device connected to the upstream end of the core docking transfer cabin is opened, the pressure in the core docking transfer cabin is equal to the pressure in the core sampler, at this time the high-temperature and high-pressure electromagnetic ball valve connected to the downstream end of the core docking transfer cabin is opened, the two systems are connected, then the hydraulic drive gas booster device at the upstream end of the core docking transfer cabin is adjusted, the core is completely moved to the core docking transfer cabin under the action of the pressure difference, then the high-temperature and high-pressure electromagnetic ball valve at the downstream end of the core docking transfer cabin is immediately closed, the hydraulic drive gas booster device at the upstream end of the core docking transfer cabin is controlled, and the gas pressure is restored to the original state, the core sampler is removed, and the high-temperature and high-pressure connection flange is removed and connected to the core circumferential cutting cabin.

[0038] ② Core pushing transfer process, the specific steps are as follows:

[0039] After the core docking transfer cabin is docked with the core circumferential cutting cabin, the high-temperature and high-pressure electromagnetic ball valves at the upstream and downstream of the core circumferential cutting cabin are closed, the hydraulic drive gas booster device connected to the core circumferential cutting cabin is opened, the pressure in the core circumferential cutting cabin is equal to the pressure in the core docking transfer cabin, then the high-temperature and high-pressure electromagnetic ball valve at the upstream of the core circumferential cutting cabin and the high-temperature and high-pressure electromagnetic ball valve at the downstream end of the core docking transfer cabin are opened, then the hydraulic drive gas booster device at the upstream end of the core docking transfer cabin is controlled, the O-shaped gas pressure piston and the driven convex link piston are moved in sequence, and the core is pushed and transferred under the action of the pressure difference, after the core is transferred from the core docking transfer cabin to the core circumferential cutting cabin and stabilized, the high-temperature and high-pressure electromagnetic ball valve at the upstream of the core circumferential cutting cabin is closed.

[0040] ③ Core fixed-length circumferential cutting process, the specific steps are as follows:

[0041] When the core is transferred from the core docking transfer cabin to the core circumferential cutting cabin, the front end of the core will contact the flip axial laser receiver, at which time the laser generator starts to work, recording the distance moved by the core (i.e. the core cutting length). When the core moves to the set distance on the laser receiver variable range walking guide rail, the laser receiver locking valve starts to lock, the core is fixed, at which time the hydraulic drive gas pressurizing device on the core circumferential cutting cabin is opened, and after the pressure is stabilized, the circumferential cutter with a chip removal channel starts to cut the core along the circumferential cutter bottom movement guide rail. After the cutting is completed, the high-temperature and high-pressure resistant electromagnetic ball valve downstream of the core circumferential cutting cabin is opened, the high-temperature and high-pressure resistant electromagnetic ball valve downstream of the core turning cabin is closed, and the hydraulic drive gas pressurizing device on the core circumferential cutting cabin is opened, so that the core after completing the fixed-length cutting slowly pushes the flip axial laser receiver to move along the laser receiver variable range walking guide rail. When it reaches the laser receiver storage slot, the flip axial laser receiver is turned over, and the core enters the core turning cabin under the action of the pressure difference. After the core enters the core turning cabin, the high-temperature and high-pressure resistant electromagnetic ball valve downstream of the core circumferential cutting cabin and the hydraulic drive gas pressurizing device on the core circumferential cutting cabin are closed, the hydraulic drive gas pressurizing device at the end of the core return rotation cabin is opened, the pressure of the core return rotation cabin is reached, and then the high-temperature and high-pressure resistant electromagnetic ball valve upstream of the core return rotation cabin is opened. When the pressure reaches the preset value, the high-temperature and high-pressure resistant electromagnetic ball valve downstream of the core turning cabin is opened. At this time, the turning drive motor is opened, and the turning drive motor provides power to the turning driven gear set at the center of the upper and lower ends of the spherical core turning chamber to drive the turning driven gear to complete the turning action. Then adjust the hydraulic drive gas pressurizing device at the end of the core return rotation cabin, so that the core after turning enters the core axial cutting cabin under the action of the pressure difference. After the core enters the core axial cutting cabin, the high-temperature and high-pressure resistant electromagnetic ball valve downstream of the core turning cabin is immediately closed, and the pressure is adjusted.

[0042] ④Core turning process, the specific steps are as follows:

[0043] When the core enters the core turning cabin, the high-temperature and high-pressure resistant electromagnetic ball valve downstream of the core circumferential cutting cabin and the hydraulic drive gas pressurizing device on the core circumferential cutting cabin are closed, the hydraulic drive gas pressurizing device at the end of the core return rotation cabin is opened, the pressure of the core return rotation cabin is reached, and then the high-temperature and high-pressure resistant electromagnetic ball valve upstream of the core return rotation cabin is opened. When the pressure reaches the preset value, the high-temperature and high-pressure resistant electromagnetic ball valve downstream of the core turning cabin is opened. At this time, the turning drive motor is opened, and the turning drive motor provides power to the turning driven gear set at the center of the upper and lower ends of the spherical core turning chamber to drive the turning driven gear to complete the turning action. Then adjust the hydraulic drive gas pressurizing device at the end of the core return rotation cabin, so that the core after turning enters the core axial cutting cabin under the action of the pressure difference. After the core enters the core axial cutting cabin, the high-temperature and high-pressure resistant electromagnetic ball valve downstream of the core turning cabin is immediately closed, and the pressure is adjusted.

[0044] ⑤First axial square cutting process of core, the specific steps are as follows:

[0045] When the core is stable in the core axial cutting cabin, the core axial limiting mechanism is raised, the hydraulic drive gas pressurizing device at the end of the core rotation return cabin is adjusted, the core is slowly moved to the core axial limiting mechanism, then the core annular fastening mechanism is opened to lock the core, then the axial cutter with a chip guide channel is started, the transverse cutting position of the axial cutter with a chip guide channel on the arc-shaped cutter frame is adjusted through the arc-shaped cutter frame transverse movement motor, the cutting work is carried out after the position is determined, the axial cutter with a chip guide channel is axially advanced along the arc-shaped cutter frame axial movement guide rail for cutting work, the axial cutter depth movement mechanism controls the fine process during axial cutting, so that the flatness of the core surface cutting effect is good, after the first cutting is completed, the core axial limiting mechanism and the core annular fastening mechanism are unlocked, the hydraulic drive gas pressurizing device at the end of the core rotation return cabin is adjusted, the core enters the core rotation return cabin, and after the core is transferred, the bottom discharge type excess material recycling chamber is opened to empty the core cuttings generated in the first cutting.

[0046] 6. Core returning process, the specific steps are as follows:

[0047] When the core enters the core rotation return cabin and is stable, the rotation sleeve rotation motor is started, at this time, the core rotates together with the core rotation sleeve, the rotation angle of the core rotation sleeve is 90 degrees clockwise, during the rotation process, the rotation sleeve annular heating part and the rotation sleeve bottom heating part jointly heat the core cut by the first time, after the rotation work is completed, the hydraulic drive gas pressurizing device at the end of the core rotation return cabin is adjusted, at this time, the high-pressure gas pushes the core to the core axial cutting cabin through the rotation sleeve gas channel, and prepares for the second cutting of the core.

[0048] 7. Core second axial square cutting process, the specific steps are as follows:

[0049] When the core is stable in the core axial cutting cabin, the core axial limiting mechanism is raised, the hydraulic drive gas pressurizing device at the end of the core rotation return cabin is adjusted, the core is slowly moved to the core axial limiting mechanism, then the core annular fastening mechanism is opened to lock the core, then the axial cutter with a chip guide channel is started, the transverse cutting position of the axial cutter with a chip guide channel on the arc-shaped cutter frame is adjusted through the arc-shaped cutter frame transverse movement motor, the cutting work is carried out after the position is determined, the axial cutter with a chip guide channel is axially advanced along the arc-shaped cutter frame axial movement guide rail for cutting work, the axial cutter depth movement mechanism controls the fine process during axial cutting, so that the flatness of the core surface cutting effect is good, after the first cutting is completed, the core axial limiting mechanism and the core annular fastening mechanism are unlocked, the hydraulic drive gas pressurizing device at the end of the core rotation return cabin is adjusted, the core enters the core rotation return cabin, and after the core is transferred, the bottom discharge type excess material recycling chamber is opened to empty the core cuttings generated in the first cutting.

[0050] The beneficial effects of the present application are:

[0051] In the application, the docking transfer cabin adopts a double-piston air pressure structure, which can accurately ensure the accurate control of the pressure in the process of transferring the core from the sampler to the square cutting heat preservation and pressure preservation system, and the movement of the core in the system is completed through the pressure difference, solving the problems of the falling and damage of the outer cover sleeve and the inability to perform axial cutting of the core caused by the outer cover sleeve, realizing the rapid transfer of the core and creating favorable conditions for the axial cutting of the core.

[0052] In the application, the core axial cutting cabin is arranged, the double cutters with chip guide channels are arranged on the arc-shaped cutter disc frame in the cabin to cut the core, the double cutters improve the cutting efficiency and ensure the flatness of the two ends of the cutting surface, and the chip guide channels on the cutters discharge the fine cuttings through the pressure in the cabin during the cutting operation, which not only eliminates the secondary damage of the cuttings to the core in the high-pressure cutting environment, but also facilitates the cleaning and maintenance of the system. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0054] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the application.

[0055] Figure 2 It is a top view of the overall structure of the application.

[0056] Figure 3 It is a schematic diagram of the system structure of the application.

[0057] Figure 4 It is a schematic diagram of the air pressure propulsion assembly structure of the application.

[0058] Figure 5 It is a schematic diagram of the core turning assembly structure of the application.

[0059] Figure 6 It is a three-dimensional sectional view of the axial cutting assembly of the application.

[0060] Figure 7 It is a schematic diagram of the axial cutting assembly structure of the application.

[0061] The serial numbers in the drawings represent the following:

[0062] 1-hydraulic drive gas pressurizing device, 2-core butt joint transfer cabin, 3-core circumferential cutting cabin, 4-core turning cabin, 5-core axial cutting cabin, 6-core rotary return cabin, 7-high temperature and high pressure resistant electromagnetic ball valve, 8-high temperature and high pressure resistant connecting flange.

[0063] 21-high pressure gas transfer port, 22-gas pressure piston rod, 23-O-shaped gas pressure piston, 24-driven convex connecting rod piston, 25-piston rod air inlet channel, 26-driven piston limiting slot, 27-driven piston air flow channel, 28-O-shaped piston sealing element, 29-driven piston bottom end limiting block, 210-driven piston sealing element, 211-driven piston front section heating head, 212-core butt joint cabin annular heating element, 213-core butt joint cabin heat preservation layer.

[0064] 31-circumferential cutter bottom movement motor, 32-circumferential cutter fixed base, 33-circumferential cutter depth movement mechanism, 34-circumferential cutter with chip removal channel, 35-flap type axial laser receiver, 36-laser receiver variable range walking guide rail, 37-laser generator, 38-laser receiver receiving groove, 39-circumferential cutter bottom movement guide rail, 310-cutter assembly annular safety guide rail, 311-axial laser receiver locking valve.

[0065] 41-turning transmission gear, 42-turning transmission motor, 43-turning driven gear, 44-spherical core turning chamber, 45-spherical turning chamber annular heating element.

[0066] 51-arcuate axial cutter frame transverse movement motor, 52-arcuate cutter frame, 53-arcuate cutter frame axial movement guide rail, 54-axial cutter with chip removal channel, 55-axial cutter depth movement mechanism, 56-axial cutting cabin heating element, 57-core annular fastening mechanism, 58-bottom discharge type excess material recycling chamber, 59-core axial limiting mechanism.

[0067] 61-core rotary sleeve, 62-rotary sleeve rotary motor, 63-rotary sleeve annular heating element, 64-rotary sleeve bottom heating element, 65-rotary sleeve gas channel. DETAILED DESCRIPTION

[0068] The technical solutions of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0069] In the description of the present application, it should be noted that the directions or positional relationships belonging to "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the directions or positional relationships described in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, "first", "second" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0070] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict between them.

[0072] As Figures 1 to 7 As shown in the figure, the present application provides a heat and pressure preservation system capable of realizing square cutting of core, which has a hydraulic drive gas pressurizing device 1, a core butt joint transfer cabin 2, a core circumferential cutting cabin 3, a core turning cabin 4, a core axial cutting cabin 5, a core rotation return cabin 6, a high-temperature and high-pressure resistant electromagnetic ball valve 7, and a high-temperature and high-pressure resistant connecting flange 8.

[0073] The hydraulic drive gas pressurizing device 1 is connected with the core butt joint transfer cabin 2, the core circumferential cutting cabin 3 and the core rotation return cabin 6, and provides power for the movement of the core in the system, while ensuring that the core is in a constant pressure state in the system.

[0074] The core butt joint transfer cabin 2 is arranged at the end of the hydraulic drive gas pressurizing device 1, and is used for receiving the heat and pressure preservation core sampled by the sampler and providing the same temperature and pressure environment as the sampler for temporarily storing the core.

[0075] The core circumferential cutting cabin 3 is arranged at the downstream end of the core butt joint transfer cabin 2, and is used for measuring the length of the required core and performing circumferential cutting of the core according to the length.

[0076] The core turning cabin 4 is arranged at the downstream end of the core circumferential cutting cabin 3, and is used for turning the direction of the core after the core circumferential cutting cabin 3 completes the length cutting work, so as to create conditions for the axial cutting work of the core.

[0077] The core axial cutting cabin 5 is arranged at the downstream end of the core turning cabin 4 and is connected with the upstream section of the core rotation returning cabin 6, and is used for cutting the axial surface of the core with the required length, so as to process the cylindrical core into a square column.

[0078] The core rotation returning cabin 6 is arranged at the downstream end of the core axial cutting cabin 5, and is used for rotating the non-standard square column core which is cut by the core axial cutting cabin 5 by 90 degrees around the central axis, and then sending the core back to the core axial cutting cabin 5 for the second cutting, so as to finally form a standard square column core.

[0079] The high-temperature and high-pressure electromagnetic ball valve 7 is arranged at the downstream end of the core butt joint transfer cabin 2 and the upstream and downstream ends of the core circumferential cutting cabin 3, the core turning cabin 4 and the core axial cutting cabin 5, and is used for controlling the opening and closing of each cabin to ensure the stability of the pressure of the cabin which is working.

[0080] The high-temperature and high-pressure connecting flange 8 is arranged at the downstream side of the high-temperature and high-pressure electromagnetic ball valve 7 at the downstream end of the core butt joint transfer cabin 2, and is connected with the upstream side of the high-temperature and high-pressure electromagnetic ball valve 7 at the upstream end of the core circumferential cutting cabin 3, so as to form an integral whole, and is used for connecting the cutting function end and the butt joint transfer end of the system, and is used as the only outlet of the system which is connected with the outside.

[0081] In the application, the upstream end of the core butt joint transfer cabin 2 is connected with the downstream end of the hydraulic drive gas pressurizing device 1 through the high-pressure gas transfer interface 21, the core butt joint transfer cabin 2 is provided with a gas pressure piston rod 22, an O-shaped gas pressure piston 23, a driven convex link piston 24, a piston rod air inlet channel 25, a driven piston limiting slot 26, a driven piston air flow channel 27, an O-shaped piston sealing element 28, a driven piston bottom end limiting block 29, a driven piston sealing element 210, a driven piston front end heating head 211, a core butt joint cabin annular heating element 212 and a core butt joint cabin heat preservation layer 213.

[0082] The driven convex link piston 24 is arranged at the downstream end of the O-shaped gas pressure piston 23, and the driven convex link piston 24 and the O-shaped gas pressure piston 23 move under the action of the pressure difference relying on the gas pressure piston rod 22 arranged at the upstream end of the core butt joint transfer cabin 2. The gas pressure piston rod 22 is a semi-solid and semi-hollow high-strength surface finishing rod with a solid upper part, an air flow channel in the lower part and a driven piston limiting slot 26 at the dry end, so as to ensure the smooth operation of all moving piston components in the butt joint transfer cabin 2.

[0083] In order to ensure the safety of the movement of the piston member in the core docking transfer chamber 2, the downstream end of the pneumatic piston rod 22 is provided with a piston rod air inlet 25. When the O-shaped pneumatic piston 23 moves to the middle and lower part along the pneumatic piston rod 22, the air flow channel in the piston cavity changes. At this time, the O-shaped pneumatic piston 23 moves to the maximum stroke. High-pressure gas is provided to the driven convex link piston 24 through the piston rod air inlet 25 from the driven piston air flow channel 27 to drive it to move. The cross section of the current air flow channel becomes smaller, which ensures the accurate control of the pressure of the driven convex link piston 24 after it contacts with the core. The driven piston bottom limiting block 29 provided at the upstream end of the driven convex link piston 24 cooperates with the driven piston limiting slot 26 at the end of the pneumatic piston rod 22 to ensure that the piston member will not overtravel. The downstream end of the driven convex link piston 24 is provided with a driven piston front end heating head 211 to heat the end surface of the core temporarily stored in the core docking transfer chamber 2. The peripheral surface of the core is heated by the core docking chamber annular heating member 212. The core docking chamber annular heating member 212 is covered with a core docking chamber heat preservation layer 213.

[0084] In the above embodiment, in order to ensure good air tightness during the movement of the piston member, the O-shaped pneumatic piston 23 is provided with an O-shaped piston sealing member 28, and the driven convex link piston 24 is provided with a driven piston sealing member 210. The movement of the O-shaped pneumatic piston 23 is the first stage piston movement, and the movement of the driven convex link piston 24 is the second stage piston movement. The two-stage piston movement design not only ensures the accuracy of pressure control, but also provides double air tightness protection.

[0085] In the application, the upstream end of the high-temperature and high-pressure electromagnetic ball valve 7 on the core circumferential cutting cabin 3 is connected to the downstream of the core butt joint transfer cabin 2 through a high-temperature and high-pressure connecting flange 8, the core circumferential cutting cabin 3 is provided with a circumferential cutter 34 with a chip guide channel, a flip axial laser receiver 35, a laser receiver variable range walking guide rail 36, a laser generator 37 and a laser receiver receiving groove 38; the circumferential cutter 34 with a chip guide channel is arranged on the circumferential cutter bottom movement guide rail 39 in the middle part of the core circumferential cutting cabin 3, and cooperates with the circumferential safety guide rail 310 of the cutter disc assembly to perform circumferential core cutting work; the flip axial laser receiver 35 is arranged directly below the circumferential cutter 34 with a chip guide channel in the initial state, and the two are in the same plane; when the core contacts the flip axial laser receiver 35, the laser generator 37 starts to emit ranging laser, the moving core pushes the flip axial laser receiver 35 to move forward on the laser receiver variable range walking guide rail 36, and after reaching the preset distance, the axial laser receiver locking valve 311 locks the flip axial laser receiver 35, the flip axial laser receiver 35 is turned over in the laser receiver receiving groove 38, the laser generator 37 stops emitting, and the circumferential cutter 34 with a chip guide channel starts to perform circumferential cutting work; the laser receiver locking valve 311 is arranged on the laser receiver variable range walking guide rail 36 and in front of the laser generator 37, and the laser generator 37 is arranged in the laser receiver receiving groove 38 and located in the middle and rear end of the core circumferential cutting cabin 3.

[0086] The circumferential cutter 34 with a chip guide channel is provided with a circumferential cutter disc bottom movement motor 31, a circumferential cutter disc fixed base 32 and a circumferential cutter disc depth movement mechanism 33; the circumferential cutter disc fixed base 32 is arranged on the upper end of the circumferential cutter disc depth movement mechanism 33 to ensure the stability of the cutter; the circumferential cutter disc depth movement mechanism 33 drives the circumferential cutter 34 with a chip guide channel to continuously penetrate into the core inside during circumferential cutting; and the circumferential cutter disc bottom movement motor 31 is arranged on the lower end of the circumferential cutter disc depth movement mechanism 33 to provide walking power for the circumferential cutter 34 with a chip guide channel.

[0087] In the application, the core turning cabin 4 is provided with a turning transmission gear 41, a turning transmission motor 42, a turning driven gear 43, a spherical core turning chamber 44 and a spherical turning chamber annular heating element 45; the spherical core turning chamber 44 is arranged in the middle part of the core turning cabin 4, and the turning driven gear 43 arranged at the center of the upper and lower ends of the spherical core turning chamber 44 is used to complete the turning of the core with a certain length; the turning driven gear 43 provides power for the turning transmission gear 41 through the turning transmission motor 42 to complete the turning action; and the spherical turning chamber annular heating element 45 is coated on the inner wall of the spherical core turning chamber 44 to heat the core with a certain length.

[0088] In the present application, the core axial cutting cabin 5 is provided with an axial cutter 54 with a chip guide channel, an axial cutting cabin heating element 56, a core hoop fastening mechanism 57, a bottom-unloading excess material recycling chamber 58, and a core axial limiting mechanism 59 arranged downstream of the core axial cutting cabin 5 and starting to rise when a core enters the core axial cutting cabin 5, limiting the core from continuing to move forward, and then the core hoop fastening mechanism 57 locks the core, the axial cutter 54 with a chip guide channel starts to cut the lateral curved surface of the core in the axial direction at the same time, and after the cutting is completed, the core hoop fastening mechanism 57 and the core axial limiting mechanism 59 are unlocked in sequence, the core is pushed into the core rotation return cabin 6, and the cuttings enter the bottom-unloading excess material recycling chamber 58; the axial cutter 54 with a chip guide channel is arranged on the arc-shaped cutter frame 52 and moves axially along the arc-shaped cutter frame axial movement guide rail 53, the arc-shaped cutter frame 52 is arranged at the upstream end of the core axial cutting cabin 5, and the arc-shaped cutter frame 52 is provided with an arc-shaped cutter frame transverse movement motor 51 at the bottom to provide power for it; the axial cutting cabin heating element 56 is arranged on the inner wall of the core axial cutting cabin 5 to heat the core.

[0089] In the above embodiment, the arc-shaped cutter frame axial movement guide rail 53 penetrates through the entire core axial cutting cabin 5, the axial cutter depth movement mechanism 55 is arranged at the bottom of the axial cutter 54 with a chip guide channel to provide power for its deep penetration into the core; the core hoop fastening mechanism 57 is arranged on the inner wall of the core axial cutting cabin 5 and is arranged in a spaced manner with the axial cutting cabin heating element 56; and the bottom-unloading excess material recycling chamber 58 is arranged upstream of the core axial limiting mechanism 59.

[0090] In the present application, the core rotation return cabin 6 is provided with a core rotation sleeve 61, a rotation sleeve rotation motor 62, a rotation sleeve hoop heating element 63, a rotation sleeve bottom heating element 64, and a rotation sleeve gas channel 65, and the end of the core rotation return cabin 6 is connected to the upstream end of the hydraulic drive gas pressurizing device 1 through the high-pressure gas transfer interface 21; the core rotation sleeve 61 is arranged at the upper end of the rotation sleeve rotation motor 62, the rotation sleeve hoop heating element 63 is arranged on the inner wall of the core rotation sleeve 61, and the rotation sleeve bottom heating element 64 is arranged at the bottom of the core rotation sleeve 61; the rotation sleeve gas channel 65 is arranged at the end of the core rotation return cabin 6 and penetrates through the core rotation sleeve 61, and when the core that has been subjected to the first axial cutting needs to be returned from the core rotation return cabin 6 to the core axial cutting cabin 5 for the second cutting, the high-pressure gas pushes the core to the core axial cutting cabin 5 through the rotation sleeve gas channel 65.

[0091] In summary, a heat preservation and pressure maintaining system capable of realizing square cutting of a core mainly includes the following steps in the implementation process:

[0092] ① Core sampler docking process, the specific steps are as follows:

[0093] The outlet end of the core sampler is connected to the core docking transfer cabin 2 through a high-temperature and high-pressure connecting flange 8, and a movable hydraulic drive gas pressurizing device 1 is connected to the other end of the core sampler. Then, the hydraulic drive gas pressurizing device 1 connected to the upstream end of the core docking transfer cabin 2 is opened, so that the pressure in the core docking transfer cabin 2 is equal to the pressure in the core sampler. At this time, the high-temperature and high-pressure electromagnetic ball valve 7 connected to the downstream end of the core docking transfer cabin 2 is opened, and the two systems are connected. Then, the hydraulic drive gas pressurizing device 1 at the upstream end of the core docking transfer cabin 2 is adjusted, so that the core moves to the core docking transfer cabin 2 under the action of the pressure difference. Then, the high-temperature and high-pressure electromagnetic ball valve 7 at the downstream end of the core docking transfer cabin 2 is immediately closed, the hydraulic drive gas pressurizing device 1 at the upstream end of the core docking transfer cabin 2 is controlled, and the gas pressure is restored to the original state. The core sampler is removed through the high-temperature and high-pressure connecting flange 8 and is docked with the core circumferential cutting cabin 3.

[0094] ②Core pushing and transferring process, the specific steps are as follows:

[0095] After the core docking transfer cabin 2 is docked with the core circumferential cutting cabin 3, the high-temperature and high-pressure electromagnetic ball valves 7 at the upstream and downstream of the core circumferential cutting cabin 3 are closed, the hydraulic drive gas pressurizing device 1 connected to the core circumferential cutting cabin 3 is opened, so that the pressure in the core circumferential cutting cabin 3 is the same as the pressure in the core docking transfer cabin 2. Then, the high-temperature and high-pressure electromagnetic ball valve 7 at the upstream of the core circumferential cutting cabin 3 and the high-temperature and high-pressure electromagnetic ball valve 7 at the downstream end of the core docking transfer cabin 2 are opened. Then, the hydraulic drive gas pressurizing device 1 at the upstream end of the core docking transfer cabin 2 is controlled, so as to sequentially drive the O-shaped gas pressure piston 23 and the driven convex link piston 24 to move, and the core is pushed and transferred under the action of the pressure difference. After the core is transferred from the core docking transfer cabin 2 to the core circumferential cutting cabin 3 and stabilized, the high-temperature and high-pressure electromagnetic ball valve 7 at the upstream of the core circumferential cutting cabin 3 is closed.

[0096] ③Core fixed-length circumferential cutting process, the specific steps are as follows:

[0097] When the core is transferred from the core docking transfer cabin 2 to the core circumferential cutting cabin 3, the front end of the core will contact the flip axial laser receiver 35, at which time the laser generator 37 starts to work, recording the distance moved by the core (i.e. the core cutting length), when the core moves to the set distance on the laser receiver variable range walking guide rail 36, the laser receiver locking valve 311 starts to lock, the core is fixed, at which time the hydraulic drive gas booster 1 on the core circumferential cutting cabin 3 is opened, and after the pressure is stabilized, the circumferential cutter 34 with a chip removal channel starts to cut the core along the circumferential cutter bottom movement guide rail 39, after the cutting is completed, the high-temperature and high-pressure resistant electromagnetic ball valve 7 downstream of the core circumferential cutting cabin 3 is opened, and the high-temperature and high-pressure resistant electromagnetic ball valve 7 downstream of the core turning cabin 4 is closed, the hydraulic drive gas booster 1 on the core circumferential cutting cabin 3 is opened, so that the core after completing the fixed-length cutting is slowly pushed to flip the flip axial laser receiver 35 along the laser receiver variable range walking guide rail 36, when it reaches the laser receiver storage slot 38, the flip axial laser receiver 35 is turned over, and the core enters the core turning cabin 4 under the action of pressure difference, after the core enters the core turning cabin 4, the high-temperature and high-pressure resistant electromagnetic ball valve 7 downstream of the core circumferential cutting cabin 3 is closed.

[0098] ④Core turning process, the specific steps are as follows:

[0099] When the core enters the core turning cabin 4, the high-temperature and high-pressure resistant electromagnetic ball valve 7 downstream of the core circumferential cutting cabin 3 and the hydraulic drive gas booster 1 on the core circumferential cutting cabin 3 are closed, the hydraulic drive gas booster 1 at the end of the core return cabin 6 is opened, so that the pressure of the core return cabin 6 reaches the preset value, then the high-temperature and high-pressure resistant electromagnetic ball valve 7 upstream of the core return cabin 6 is opened, when the pressure reaches the preset value, the high-temperature and high-pressure resistant electromagnetic ball valve 7 downstream of the core turning cabin 4 is opened, at which time the turning drive motor 42 is started, the turning drive gear 41 is powered by the turning drive motor 42 to drive the turning driven gear 43 arranged at the center of the upper and lower ends of the spherical core turning chamber 44 to complete the turning action, then the hydraulic drive gas booster 1 at the end of the core return cabin 6 is adjusted, so that the turned core enters the core axial cutting cabin 5 under the action of pressure difference, after the core enters the core axial cutting cabin 5, the high-temperature and high-pressure resistant electromagnetic ball valve 7 downstream of the core turning cabin 4 is immediately closed, and the pressure is adjusted.

[0100] ⑤First axial square cutting process of core, the specific steps are as follows:

[0101] When the core is stable in the core axial cutting cabin 5, the core axial limiting mechanism 59 is raised, the hydraulic drive gas pressurizing device 1 at the end of the core rotation return cabin 6 is adjusted, the core is slowly moved to the core axial limiting mechanism 59, then the core annular fastening mechanism 57 is opened to lock the core, then the axial cutter 54 with a chip guide channel is started, the transverse cutting position of the axial cutter 54 with a chip guide channel on the arc-shaped cutter frame 52 is adjusted through the arc-shaped cutter frame transverse movement motor 51, after the position is determined, cutting work is carried out, the axial cutter 54 with a chip guide channel is axially advanced along the arc-shaped cutter frame axial movement guide rail 53 for cutting work, the axial cutter depth movement mechanism 55 controls the fine progress during axial cutting, so as to achieve excellent flatness of the core surface cutting effect, after the first cutting is completed, the core axial limiting mechanism 59 and the core annular fastening mechanism 57 are unlocked, the hydraulic drive gas pressurizing device 1 at the end of the core rotation return cabin 6 is adjusted, the core enters the core rotation return cabin 6, after the core is transferred, the bottom discharge type excess material recycling chamber 58 is opened to empty the core cuttings generated in the first cutting.

[0102] ⑥Core return process, the specific steps are as follows:

[0103] When the core enters the core rotation return cabin 6 and is stable, the rotation sleeve rotation motor 62 is started, at this time, the core rotates together with the core rotation sleeve 61, the rotation angle of the core rotation sleeve 61 is 90° clockwise rotation, during the rotation process, the rotation sleeve annular heating element 63 and the rotation sleeve bottom heating element 64 jointly heat the core cut by the first cutting, after the rotation work is completed, the hydraulic drive gas pressurizing device 1 at the end of the core rotation return cabin 6 is adjusted, at this time, the high-pressure gas pushes the core to the core axial cutting cabin 5 through the rotation sleeve gas passage 65, preparing for the second cutting of the core.

[0104] ⑦Core second axial square cutting process, the specific steps are as follows:

[0105] When the core is stable in the core axial cutting cabin 5, the core axial limiting mechanism 59 is raised, the hydraulic drive gas pressurizing device 1 at the end of the core rotation return cabin 6 is adjusted, the core is slowly moved to the core axial limiting mechanism 59, then the core annular fastening mechanism 57 is opened to lock the core, then the axial cutter 54 with a chip guide channel is started, the transverse cutting position of the axial cutter 54 with a chip guide channel on the arc-shaped cutter frame 52 is adjusted through the arc-shaped cutter frame transverse movement motor 51, after the position is determined, cutting work is carried out, the axial cutter 54 with a chip guide channel is axially advanced along the arc-shaped cutter frame axial movement guide rail 53 for cutting work, the axial cutter depth movement mechanism 55 controls the fine progress during axial cutting, so as to achieve excellent flatness of the core surface cutting effect, when the cutting work is completed, the core second cutting is completed, and the core finally becomes a square column core.

[0106] Obviously, the above-mentioned embodiments are only examples for clearly illustrating the present application, and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be enumerated. The obvious changes or variations derived from the above description are still within the protection scope of the present application.

Claims

1. A thermal insulation and pressure-maintaining system capable of achieving square core cutting, characterized in that, have: The hydraulically driven gas booster device (1) is configured to be connected to the core docking and transfer chamber (2), the core circumferential cutting chamber (3) and the core rotation return chamber (6). The hydraulically driven gas booster device (1) provides power for the movement of the core in the system, while ensuring that the core is in a constant pressure state in the system. The core docking and transfer chamber (2) is located at the end of the hydraulically driven gas pressurization device (1). The core docking and transfer chamber (2) is used to receive the heat-insulated and pressure-insulated core sampled by the sampler and provide the core with the same temperature and pressure environment as the sampler for temporary storage. The core circumferential cutting chamber (3) is located at the downstream end of the core docking and transfer chamber (2). The core circumferential cutting chamber (3) is used to measure the length of the required core and to perform circumferential cutting of the core around the perimeter based on the length. The core turning chamber (4) is located at the downstream end of the core circumferential cutting chamber (3). The core turning chamber (4) is used to turn the core direction after the core circumferential cutting chamber (3) has completed the fixed-length cutting work, so as to create conditions for the core axial cutting work. The core axial cutting chamber (5) is located at the downstream end of the core turning chamber (4) and connected to the upstream section of the core rotation return chamber (6). The core axial cutting chamber (5) is used to cut the axial curved surface of the core that meets the length requirements and process the cylindrical core into a square column. The core rotation return chamber (6) is located downstream of the core axial cutting chamber (5). The core rotation return chamber (6) is used to rotate the non-standard square columnar core that has been cut for the first time by the core axial cutting chamber (5) 90° around the central axis and then send it back to the core axial cutting chamber (5) for a second cut, and finally form a standard square columnar core. High temperature and high pressure electromagnetic ball valve (7) is installed at the downstream end of the core docking and transfer chamber (2) and at the upstream and downstream ends of the core circumferential cutting chamber (3), core turning chamber (4), and core axial cutting chamber (5). The high temperature and high pressure electromagnetic ball valve (7) is used to control the opening and closing of each chamber to ensure the pressure stability of the working chamber. The high-temperature and high-pressure resistant connecting flange (8) is located downstream of the high-temperature and high-pressure resistant electromagnetic ball valve (7) at the downstream end of the core docking and transfer chamber (2), and can be connected to the upstream end of the high-temperature and high-pressure resistant electromagnetic ball valve (7) at the upstream end of the core circumferential cutting chamber (3) to form an integral unit. The high-temperature and high-pressure resistant connecting flange (8) is used to connect the heat preservation and pressure preservation cutting function end of the system with the docking and transfer end, and serves as the only outlet of the system that connects to the outside world.

2. The heat-insulating and pressure-maintaining system for achieving square core cutting according to claim 1, characterized in that, The upstream end of the core docking transfer chamber (2) is connected to the downstream end of the hydraulically driven gas booster device (1) through a high-pressure gas adapter (21). The core docking transfer chamber (2) is equipped with a pneumatic piston rod (22), an O-shaped pneumatic piston (23), a driven convex connecting rod piston (24), a piston rod air inlet (25), a driven piston limiting slot (26), a driven piston airflow channel (27), an O-shaped piston seal (28), a driven piston bottom limiting block (29), a driven piston seal (210), a driven piston front heating head (211), a core docking chamber annular heating element (212), and a core docking chamber insulation layer (213). The driven convex connecting rod piston (24) is located at the downstream end of the O-shaped pneumatic piston (23). The driven convex connecting rod piston (24) and the O-shaped pneumatic piston (23) move under the action of pressure difference by relying on the pneumatic piston rod (22). The pneumatic piston rod (22) is located at the upstream end of the core docking and transfer chamber (2). The downstream end of the pneumatic piston rod (22) is provided with a piston rod air inlet (25). When the O-shaped pneumatic piston (23) moves to the maximum stroke, it stops moving forward. The high-pressure gas provides power to the driven convex connecting rod piston (24) through the piston rod air inlet (25) and the driven piston airflow channel (27), thus driving it to move. The driven piston front heating head (211) is located at the downstream end of the driven convex connecting rod piston (24) to heat the end face of the core temporarily stored in the core docking transfer chamber (2). The periphery of the core is heated by the annular heating element (212) of the core docking chamber. The annular heating element (212) of the core docking chamber is covered with a core docking chamber insulation layer (213).

3. The heat-insulating and pressure-maintaining system for achieving square core cutting according to claim 2, characterized in that, The O-shaped pneumatic piston (23) is provided with an O-shaped piston seal (28) to ensure good airtightness when the O-shaped pneumatic piston (23) moves. The driven convex connecting rod piston (24) is provided with a driven piston bottom end limiting block (29) and a driven piston seal (210). The driven piston bottom end limiting block (29) is located at the upstream end of the driven convex connecting rod piston (24) and cooperates with the driven piston limiting groove (26) to prevent the driven convex connecting rod piston (24) from moving ahead. The driven piston limiting groove (26) is located at the downstream end of the pneumatic piston rod (22). The driven piston seal (210) ensures good airtightness when the driven convex connecting rod piston (24) moves.

4. The heat-insulating and pressure-maintaining system for achieving square core cutting according to claim 3, characterized in that, The upstream end of the high temperature and high pressure resistant electromagnetic ball valve (7) of the core circumferential cutting chamber (3) is connected to the downstream of the core docking and transfer chamber (2) through the high temperature and high pressure resistant connecting flange (8). The core circumferential cutting chamber (3) is equipped with a circumferential cutter (34) with a chip guide channel, a flip-top axial laser receiver (35), a laser receiver variable travel guide rail (36), a laser generator (37), and a laser receiver storage slot (38). The circumferential cutter (34) with chip guide channel is set on the bottom motion guide rail (39) of the circumferential cutter head in the middle of the core circumferential cutting chamber (3), and works together with the circumferential safety guide rail (310) of the cutter head assembly to carry out circumferential core cutting work. The flip-type axial laser receiver (35) is positioned directly below the circumferential cutter (34) with a chip guide channel in the initial state, and the two are on the same plane. When a rock core contacts the flip-type axial laser receiver (35), the laser generator (37) starts to emit a ranging laser. The moving rock core pushes the flip-type axial laser receiver (35) forward on the laser receiver variable travel guide rail (36). After reaching a preset distance, the axial laser receiver locking valve (311) locks the flip-type axial laser receiver (35), and the flip-type axial laser receiver (35) flips over into the laser receiver storage slot (38). The laser generator (37) stops emitting, and the circumferential cutter (34) with a chip guide channel begins to perform circumferential cutting.

5. The heat-insulating and pressure-maintaining system for achieving square core cutting according to claim 4, characterized in that, The circumferential cutter (34) with chip guide channel is equipped with a circumferential cutter head bottom motion motor (31), a circumferential cutter head fixed base (32), and a circumferential cutter head in-depth motion mechanism (33). The circumferential cutter head fixed base (32) is located at the upper end of the circumferential cutter head in-depth motion mechanism (33) to ensure the stability of the cutter. The circumferential cutter head in-depth motion mechanism (33) drives the circumferential cutter (34) with chip guide channel to continuously penetrate into the core during circumferential cutting. The circumferential cutter head bottom motion motor (31) is located at the lower end of the circumferential cutter head in-depth motion mechanism (33) to provide walking power for the circumferential cutter (34) with chip guide channel. The laser receiver locking valve (311) is located on the variable travel guide rail (36) of the laser receiver and at the front end of the laser generator (37). The laser generator (37) is located in the laser receiver storage slot (38) and at the rear end of the core circumferential cutting chamber (3).

6. The heat-insulating and pressure-maintaining system for achieving square core cutting according to claim 5, characterized in that, The core steering chamber (4) is equipped with a steering transmission gear (41), a steering transmission motor (42), a steering driven gear (43), a spherical core steering chamber (44), and a spherical steering chamber annular heating element (45). The spherical core steering chamber (44) is located in the middle of the core steering chamber (4). The steering driven gear (43) located at the center of the upper and lower ends of the spherical core steering chamber (44) completes the steering of the core of the required length. The steering driven gear (43) provides power to the steering transmission gear (41) through the steering transmission motor (42) to complete the steering action. The spherical steering chamber annular heating element (45) is covered inside the inner wall of the spherical core steering chamber (44) to heat the core of the required length.

7. The heat-insulating and pressure-maintaining system for achieving square core cutting according to claim 6, characterized in that, The core axial cutting chamber (5) is equipped with an axial cutter (54) with a chip guide channel, an axial cutting chamber heating element (56), a core circumferential fastening mechanism (57), a bottom discharge residual material recovery chamber (58), and a core axial restriction mechanism (59). The core axial restriction mechanism (59) is located downstream of the core axial cutting chamber (5). When a core enters the core axial cutting chamber (5), it begins to rise, restricting the core from continuing to move forward. Subsequently, the core circumferential fastening mechanism (57) locks the core, and the axial cutter (54) with the chip guide channel begins to cut the lateral curved surface of the core along the core axial direction. After the cutting is completed, the core circumferential fastening mechanism (57) and the core axial restriction mechanism (59) are unlocked in sequence, and the core is pushed into the core rotary return chamber (6). The cut-off rock chips enter the bottom discharge residual material recovery chamber (58). The axial cutter (54) with chip guide channel is set on the bow-shaped cutter head frame (52) and moves axially along the axial motion guide rail (53) of the bow-shaped cutter head frame. The bottom of the bow-shaped cutter head frame (52) is provided with a bow-shaped axial cutter head frame transverse motion motor (51) to provide power for it. The heating element (56) of the axial cutting chamber is installed on the inner wall of the core axial cutting chamber (5) to heat the core.

8. The heat-insulating and pressure-maintaining system for achieving square core cutting according to claim 7, characterized in that, The bow-shaped cutter head frame (52) is located at the upstream end of the core axial cutting chamber (5); the bow-shaped cutter head frame axial motion guide rail (53) runs through the entire core axial cutting chamber (5); the axial cutter head depth motion mechanism (55) is located at the bottom of the axial cutter (54) with chip guide channel, providing power for it to penetrate into the core; the core circumferential fastening mechanism (57) is located on the inner wall of the core axial cutting chamber (5), and is arranged at intervals with the axial cutting chamber heating element (56); the bottom discharge residual material recovery chamber (58) is located upstream of the core axial restriction mechanism (59).

9. The heat-insulating and pressure-maintaining system for achieving square core cutting according to claim 8, characterized in that, The core rotary return chamber (6) is equipped with a core rotary sleeve (61), a rotary sleeve rotary motor (62), a rotary sleeve circumferential heating element (63), a rotary sleeve bottom heating element (64), and a rotary sleeve gas channel (65). The end of the core rotary return chamber (6) is connected to the upstream end of the hydraulically driven gas booster device (1) through a high-pressure gas adapter (21). The core rotary sleeve (61) is located at the upper end of the rotary sleeve rotary motor (62), and the rotary sleeve circumferential heating element (63) is located at the upper end of the rotary sleeve rotary motor (62). The core rotating sleeve (61) is installed on the inner wall of the core rotating sleeve (61), and the bottom heating element (64) of the rotating sleeve is installed at the bottom of the core rotating sleeve (61); the gas channel (65) of the rotating sleeve is installed at the end of the core rotating return chamber (6) and passes through the core rotating sleeve (61). When the core that has completed the first axial cut needs to return from the core rotating return chamber (6) to the core axial cutting chamber (5) for the second cut, the high pressure gas pushes the core to the core axial cutting chamber (5) through the gas channel (65) of the rotating sleeve.

10. The heat-insulating and pressure-maintaining system for achieving square core cutting according to claim 9, characterized in that: The implementation process includes the following steps: ①The core sampler docking process, the specific steps are as follows: The outlet end of the core sampler is connected to the core docking and transfer chamber (2) via a high-temperature and high-pressure resistant connecting flange (8). A movable hydraulically driven gas booster device (1) is connected to the other end of the core sampler. Then, the hydraulically driven gas booster device (1) connected to the upstream end of the core docking and transfer chamber (2) is turned on to make the pressure inside the core docking and transfer chamber (2) equal to the pressure inside the core sampler. At this time, the high-temperature and high-pressure resistant electromagnetic ball valve (7) connected to the downstream end of the core docking and transfer chamber (2) is turned on to connect the two systems. Then adjust the hydraulically driven gas pressurizing device (1) at the upstream end of the core docking and transfer chamber (2) so that the core moves completely to the core docking and transfer chamber (2) under the action of pressure difference. Then immediately close the high temperature and high pressure electromagnetic ball valve (7) at the downstream end of the core docking and transfer chamber (2) and control the hydraulically driven gas pressurizing device (1) at the upstream end of the core docking and transfer chamber (2) to restore the gas pressure to the original state. Remove the core sampler and dock it with the core circumferential cutting chamber (3) through the high temperature and high pressure connecting flange (8). ②The core pushing and transfer process involves the following steps: After the core docking transfer chamber (2) and the core circumferential cutting chamber (3) are docked, the high temperature and high pressure electromagnetic ball valves (7) upstream and downstream of the core circumferential cutting chamber (3) are closed, and the hydraulic drive gas booster device (1) connected to the core circumferential cutting chamber (3) is opened so that the pressure in the core circumferential cutting chamber (3) is the same as the pressure in the core docking transfer chamber (2). Then, the high temperature and high pressure electromagnetic ball valve (7) upstream of the core circumferential cutting chamber (3) and the high temperature and high pressure electromagnetic ball valve (7) downstream of the core docking transfer chamber (2) are opened. Then, the hydraulic drive gas booster device (1) upstream of the core docking transfer chamber (2) is controlled so that it pushes the O-shaped pneumatic piston (23) and the driven convex connecting rod piston (24) in sequence, and completes the core push transfer under the action of pressure difference. After the core is transferred from the core docking transfer chamber (2) to the core circumferential cutting chamber (3) and stabilized, the high temperature and high pressure electromagnetic ball valve (7) upstream of the core circumferential cutting chamber (3) is closed. ③ The specific steps of the core circumferential cutting process are as follows: When the core is transferred from the core docking transfer chamber (2) to the core circumferential cutting chamber (3), the front end of the core will contact the flip-top axial laser receiver (35). At this time, the laser generator (37) starts working and records the distance the core moves, i.e. the core cutting length. When the core moves to the set distance on the variable travel guide rail (36) of the laser receiver, the locking valve (311) of the laser receiver starts to lock and the core is fixed. At this time, the hydraulic drive gas booster device (1) on the core circumferential cutting chamber (3) is turned on. After the pressure stabilizes, the circumferential cutter (34) with the chip guide channel starts to cut the core circumferentially along the bottom movement guide rail (39) of the circumferential cutter head. After the cutting is completed, the opening is turned on. The high-temperature and high-pressure electromagnetic ball valve (7) downstream of the core circumferential cutting chamber (3) is closed, and the high-temperature and high-pressure electromagnetic ball valve (7) downstream of the core turning chamber (4) is opened. The hydraulically driven gas booster device (1) on the core circumferential cutting chamber (3) is opened, so that the core that has completed the fixed-length cutting slowly pushes the flip-top axial laser receiver (35) to move along the laser receiver variable-range travel guide rail (36). When it reaches the laser receiver storage slot (38), the flip-top axial laser receiver (35) flips over, and the core enters the core turning chamber (4) under the action of pressure difference. After the core enters the core turning chamber (4), the high-temperature and high-pressure electromagnetic ball valve (7) downstream of the core circumferential cutting chamber (3) is closed. ④ The core reversal process involves the following steps: After the core enters the core turning chamber (4), close the high-temperature and high-pressure electromagnetic ball valve (7) downstream of the core circumferential cutting chamber (3) and the hydraulically driven gas pressurizing device (1) on the core circumferential cutting chamber (3), and open the hydraulically driven gas pressurizing device (1) at the end of the core rotating return chamber (6) to make the pressure of the core rotating return chamber (6) reach the pre-value. Then open the high-temperature and high-pressure electromagnetic ball valve (7) upstream of the core rotating return chamber (6). When the pressure reaches the pre-value, open the high-temperature and high-pressure electromagnetic ball valve (7) downstream of the core turning chamber (4). At this time, the turning chamber is turned on. The drive motor (42) provides power to the steering drive gear (41) through the steering drive motor (42) to drive the steering driven gear (43) set at the center of the upper and lower ends of the spherical core steering chamber (44) to complete the steering action. Then, the hydraulic drive gas booster device (1) at the end of the core rotation return chamber (6) is adjusted so that the core that has turned enters the core axial cutting chamber (5) under the action of pressure difference. After the core enters the core axial cutting chamber (5), the high temperature and high pressure electromagnetic ball valve (7) downstream of the core steering chamber (4) is immediately closed, and the pressure is adjusted at the same time. ⑤ The first axial square cutting process of the core is as follows: After the core is stabilized in the core axial cutting chamber (5), the core axial limiting mechanism (59) is raised, and the hydraulic drive gas booster device (1) at the end of the core rotation return chamber (6) is adjusted to slowly move the core to the core axial limiting mechanism (59). Then, the core circumferential fastening mechanism (57) is opened to lock the core. Subsequently, the axial cutter (54) with chip guide channel is started. First, the transverse cutting position of the axial cutter (54) with chip guide channel on the bow-shaped cutter head frame (52) is adjusted by the transverse motion motor (51) of the bow-shaped axial cutter head frame. After the position is determined, the cutting work is carried out. The axial cutter (54) of the chip channel moves along the axial movement guide rail (53) of the bow-shaped cutter head frame to perform axial cutting. The axial cutter head depth movement mechanism (55) controls the fine process of axial cutting to achieve a smoothness with excellent cutting effect on the core surface. After the first cutting is completed, the core axial restriction mechanism (59) and the core circumferential fastening mechanism (57) are unlocked. The hydraulic drive gas booster device (1) at the end of the core rotary return chamber (6) is adjusted to allow the core to enter the core rotary return chamber (6). After the core is transferred, the bottom discharge residual material recovery chamber (58) is opened to clear the rock chips generated by the first cutting. ⑥ The core return process involves the following steps: After the core enters the core return chamber (6) and stabilizes, the rotary sleeve rotary motor (62) is turned on. At this time, the core rotates together with the core rotary sleeve (61). The rotation angle of the core rotary sleeve (61) is 90° clockwise. During the rotation, the rotary sleeve circumferential heating element (63) and the rotary sleeve bottom heating element (64) heat the core that has been cut for the first time. After the rotation is completed, the hydraulic drive gas booster device (1) at the end of the core return chamber (6) is adjusted. At this time, the high pressure gas pushes the core to the core axial cutting chamber (5) through the rotary sleeve gas channel (65) to prepare for the second cutting of the core. ⑦ The second axial square cutting process of the core is as follows: After the core is stabilized in the core axial cutting chamber (5), the core axial limiting mechanism (59) is raised, and the hydraulic drive gas pressurization device (1) at the end of the core rotation return chamber (6) is adjusted so that the core slowly moves to the core axial limiting mechanism (59). Then, the core circumferential fastening mechanism (57) is opened to lock the core. Subsequently, the axial cutter (54) with chip guide channel is started. First, the transverse motion motor (51) of the bow-shaped axial cutter head frame adjusts the transverse cutting position of the axial cutter (54) with chip guide channel on the bow-shaped cutter head frame (52). After the position is determined, the cutting work is carried out. The axial cutter (54) with chip guide channel performs axial advance cutting work along the axial motion guide rail (53) of the bow-shaped cutter head frame. The axial cutter head depth motion mechanism (55) controls the fine process of axial cutting to achieve a smoothness with excellent cutting effect on the core surface. After the cutting work is completed, the second cutting of the core is completed, and the core finally becomes a square column core.

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