CN114023124B - In-situ self-triggering film-forming while-drilling quality-guaranteeing coring simulation device and coring method - Google Patents

Abstract

The invention discloses an in-situ self-triggering film-forming and quality-preserving coring simulation device and a coring method, which can simulate the high-temperature and high-pressure coring environment of the in-situ deep bottom layer. It covers evenly and completely, and forms a solid-state sealing film with high barrier properties through the cross-linking and curing reaction, which protects the core from drilling fluid contamination and prevents the material inside the core from escaping, so that the core can truly reflect the in-situ formation state. Provide guidance for deep resource exploration and development operations, and lay the foundation for deep rock science and deep biology exploration and research.

Description

A kind of in-situ self-triggering while drilling film-forming and quality-guaranteed coring simulation device and coring method

technical field

The invention relates to the technical field of scientific drilling of rocks, in particular to an in-situ self-triggering while drilling film-forming and quality-guaranteed coring simulation device and a coring method.

Background technique

During the process of core drilling and core removal, the core will be polluted by bottom-hole formation water or drilling fluid, etc., which will affect the in-situ quality, oil and gas content and humidity of the core. The influence leads to changes in the living environment of microorganisms and affects scientific research; at the same time, the loss of oil and gas resources in the core will lead to distortion of resource evaluation. Therefore, the quality assurance of deep rock drilling and coring basically adopts closed coring technology to achieve in-situ coring with guaranteed quality, namely A polymer-based sealing fluid is used to form a liquid film on the surface of the core to reduce the infiltration of the core by the drilling fluid.

A lot of research has been done on the closed coring technology in the field of rock drilling technology, but the existing rock coring technology cannot achieve complete quality coring. The pin fixes the sealed piston at the bottom of the coring barrel. During the drilling and coring process, the pin is sheared due to the action of the WOB, the sealing fluid is squeezed out, and a protection zone is formed at the bottom of the hole to prevent the core from being polluted by the drilling fluid. It is a liquid film, which cannot guarantee the loss of the core composition; this is very unfavorable for the exploration of the in-situ environment, oil and gas resource exploration, and deep medical research. Therefore, there is an urgent need for a solid sealing film that can form a solid sealing film on the surface of the core while drilling, and seal it in real time. A film-forming-while-drilling simulation device and coring method for quality-preserving original composition information in cores.

SUMMARY OF THE INVENTION

The invention aims to provide an in-situ self-triggering coring-while-drilling film-forming and quality-preserving coring simulation device and coring method, which can simulate the high-temperature and high-pressure coring environment of the in-situ deep bottom layer. Triggered release forms film-forming fluid through static mixing agitator. The film-forming fluid covers the core surface evenly and completely, and forms a solid-state sealing film with high barrier properties through cross-linking and curing, which protects the core from drilling fluid contamination and prevents The material inside the core is lost, so that the core can truly reflect the in-situ stratum state, provide guidance for deep resource exploration and development operations, and lay a foundation for deep rock science and deep biology exploration and research.

Embodiments of the present invention are implemented as follows:

An in-situ self-triggering-while-drilling film-forming and quality-guaranteed coring simulation device, comprising a simulation cabin, a film-forming device arranged in the simulation cabin, and a core base for holding a core, the core base being arranged in the formation At the bottom of the membrane device, there is a coring barrel and a center rod in the film-forming device, the center rod is sealed and telescopically arranged in the coring barrel, and one end of the coring barrel close to the core base is provided with a core for taking the core. There is a compression part fixed on the central rod, the compression part is slidably and sealedly connected with the inner wall of the coring barrel, and then the central rod, the coring barrel and the compression part are enclosed to form an extrusion cavity, the extrusion cavity There are liquid storage coil A and liquid storage coil B respectively used for storing liquid A and liquid B, and the film-forming liquid release mechanism and the mixing coil are also arranged on the coring cylinder, and the film-forming liquid is released. The mechanism includes an adjustment cavity communicated with the mixing coil, the other end of the adjustment cavity is also connected with a liquid storage coil A and a liquid storage coil B, and a spring movable assembly for controlling the opening and closing of the adjustment cavity is arranged in the adjustment cavity; The mixing coil is used to mix liquid A and liquid B to form a mixed film-forming liquid, and output the film-forming liquid to the outer surface of the rock sample; the simulation cabin is also provided with a center rod and a coring cylinder for adjusting the center rod Displacement adjustment device for relative distance.

Preferably, the displacement adjusting device includes an annular piston for pushing the coring barrel to move up and down, the annular piston is sleeved on one end of the central rod extending out of the coring barrel, and the central rod is connected to the coring barrel. The simulation cabin is fixed, and the annular piston is fixedly connected to the coring barrel, the annular piston is slidably connected to the central rod, and the annular piston is connected to a liquid injection pump.

Preferably, the displacement adjusting device includes a push rod for pushing the core barrel to move up and down, one end of the push rod extends out of the simulation cabin, and the other end is connected to the core barrel, and the push rod is connected to the core barrel. The center rod is slidably connected, the push rod is connected with the liquid injection pump, and the center rod is fixed with the simulation cabin.

Preferably, the displacement adjusting device includes a connecting rod for connecting a central rod and a core, the end of the central rod away from the core extends out of the simulation cabin, the central rod is connected to a liquid injection pump, and the coring barrel Fixed with the simulation cabin.

Preferably, the simulation cabin includes a casing, the casing is arranged outside the coring cylinder, an upper flange is arranged on the top of the casing, and a lower flange is arranged at the bottom, and the casing is also sleeved with a Heating jacket for heating the simulation cabin.

Preferably, an end of the casing close to the upper flange is provided with a liquid injection port for injecting medium liquid, and an end of the casing close to the lower flange is provided with a liquid discharge port for discharging the medium liquid.

Preferably, the liquid storage coil A and the liquid storage coil B are alternately and coiled in the extrusion cavity, and the number of the film-forming liquid releasing mechanisms is two, and one is used to communicate with the liquid storage coil A alone. And the mixing coil, the other is used to connect the liquid storage coil B and the mixing coil separately.

Preferably, the film-forming liquid release mechanism is arranged above the extrusion cavity, the bottom of the liquid storage coil A and the liquid storage coil B have no openings, and the tops are provided with openings communicating with the film-forming liquid release mechanism, The mixing coil is arranged at the bottom of the compression part and is fixed on the coring barrel, and the coring barrel is provided with a first infusion pipe for connecting the mixing coil and the adjustment cavity.

Preferably, the spring movable assembly includes a blocking screw, a spring and a floating piston arranged in an adjustment cavity, and one end of the adjustment cavity is provided with a connection to the liquid storage coil A and/or the liquid storage coil B. For the liquid inlet, the side wall of the adjustment chamber is provided with a liquid outlet that communicates with the mixing coil, and the floating piston is used to control the on-off between the liquid inlet and the liquid outlet.

Preferably, the bottom of the coring barrel is further provided with a bottom sealer, and the bottom sealer is enclosed with the central rod and the coring barrel to form a sampling cavity for accommodating rock samples; the bottom sealer is elastic petal-shaped The end of each petal is fixed on the inner wall of the coring barrel, and the other end faces abut against each other to seal the bottom of the coring barrel.

Preferably, the liquid A includes epoxy resins or polydimethylsiloxanes, and the liquid B includes epoxy curing agents or polymethylhydrogensiloxanes.

There is also provided an in-situ self-triggering method for coring with film formation while drilling, comprising the following steps: S1: storing liquid A in liquid storage coil A, storing liquid B in liquid storage coil B, and liquid A and liquid The film-forming liquid after mixing B can be cross-linked and solidified to form a solid protective film; S2: The coring cylinder is used to coring the rock, and the rock is put into the closed space; S3: Liquid A and liquid B are input into the mixing coil Mixing to form a film-forming liquid; S4: Spray the film-forming liquid on the rock surface and fill it into a closed space until the film-forming liquid completely covers the rock surface; S5: After the film-forming liquid is completely solidified on the rock surface, take out the rock.

Due to the adoption of the above technical solutions, the beneficial effects of the present invention include: an in-situ self-triggering film-forming-while-drilling and quality-preserving coring simulation device and coring method of the present invention, comprising a simulation cabin and a film-forming device arranged in the simulation cabin and a core base for holding the core, the core base is arranged at the bottom of the film-forming device, and the film-forming device is provided with a coring barrel and a center rod, the center rod is sealed and telescopically arranged in the coring barrel, and the coring barrel is close to the One end of the core base is provided with a sampling cavity for taking the core, a compression part is fixed on the central rod, the compression part is slidably and sealedly connected with the inner wall of the coring barrel, and then the central rod, the coring barrel and the compression part are enclosed to form an extrusion cavity, The extrusion chamber is provided with a liquid storage coil A and a liquid storage coil B for storing liquid A and liquid B, respectively, and a film-forming liquid release mechanism and a mixing coil are also provided on the coring barrel. The film-forming liquid release mechanism It includes an adjustment cavity that communicates with the mixing coil, and the other end of the adjustment cavity is also connected with a liquid storage coil A and a liquid storage coil B. The adjustment cavity is provided with a spring movable component for controlling the opening and closing of the adjustment cavity; the mixing coil is used for Mixing liquid A and liquid B forms a mixed film-forming liquid, and outputs the film-forming liquid to the outer surface of the rock sample; a displacement adjusting device for adjusting the relative distance between the center rod and the core barrel is also arranged in the simulation cabin.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be viewed as As a limitation of the scope, for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a structural cross-sectional view of a film forming device of the present invention;

2 is an enlarged view of part A of FIG. 1 of the present invention;

Fig. 3 is the partial B enlarged view of Fig. 1 of the present invention;

Fig. 4 is the A-A sectional view of Fig. 1 of the present invention;

Fig. 5 is the B-B direction sectional view of Fig. 1 of the present invention;

6 is a structural view of the coring state of the film forming device of the present invention;

7 is an enlarged view of part A of FIG. 6 of the present invention;

8 is an enlarged view of part B of FIG. 6 of the present invention;

9 is a structural diagram of the film forming device of the present invention after coring;

FIG. 10 is an enlarged view of part B of FIG. 9 of the present invention;

Fig. 11 is the structure diagram before coring of the first structure of the present invention;

Figure 12 is a structural diagram of the first structural coring core of the present invention;

Figure 13 is a structural diagram of the first structure of the present invention after coring;

Fig. 14 is the structure diagram before coring of the second structure of the present invention;

Fig. 15 is the structure diagram of the second structure core of the present invention;

Fig. 16 is the structure diagram after coring of the second structure of the present invention;

Fig. 17 is the structure diagram before coring of the third structure of the present invention;

Fig. 18 is the structure diagram of the third structural coring core of the present invention;

FIG. 19 is a structural diagram of the third structure of the present invention after coring.

Symbol description of specific elements: 1- center rod, 2- shell, 3- upper flange, 4- film-forming liquid release mechanism, 5- liquid storage coil A, 6- liquid storage coil B, 7- first infusion Tube, 8-coring barrel, 9-mixing coil, 10-spring clip, 11-core jaw, 12-rock, 13-bottom sealer, 14-lower flange, 15-compression, 16-connector , 17-Second infusion pipe, 18-Third infusion pipe, 19-Push rod, 20-Rod, 21-Ring piston,-22-Injection port, 23-Drain port, 24-Core base, 25- Heating mantle, 41-blocking screw, 42-spring, 43-floating piston, 91-static mixer.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. The following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment 1: Please refer to FIG. 1 to FIG. 19 , an in-situ self-triggering coring-while-drilling film-forming and quality-preserving simulation device of this embodiment includes a simulation cabin and a film-forming device arranged in the simulation cabin and used for storing The core base 24 of the rock core, the core base 24 is arranged at the bottom of the film-forming device, and the film-forming device has a coring barrel 8 and a central rod 1, and the central rod 1 is sealed and telescopically arranged in the coring barrel 8, and the coring barrel 8 is close to the core base. One end of the 24 is provided with a sampling cavity for taking cores, a compression part 15 is fixed on the central rod 1, and the compression part 15 is slidably and sealedly connected with the inner wall of the coring barrel 8, and then the central rod 1, the coring barrel 8 and the compression part 15 are enclosed. Combined to form a squeeze cavity, the squeeze cavity is provided with a liquid storage coil A5 and a liquid storage coil B6 for storing liquid A and liquid B respectively, and the core barrel 8 is also provided with a film-forming liquid release mechanism 4 and a mixing The coil 9 and the film-forming liquid release mechanism 4 include an adjustment cavity that communicates with the mixing coil 9. The other end of the adjustment cavity is also connected with a liquid storage coil A5 and a liquid storage coil B6. The broken spring 42 is a movable component; the mixing coil 9 is used to mix liquid A and liquid B to form a mixed film-forming liquid, and output the film-forming liquid to the outer surface of the rock 12 sample; the simulation cabin is also provided with a center rod 1 for adjusting A displacement adjusting device for the relative distance from the coring barrel 8 . Simulate the high-temperature and high-pressure coring environment in in-situ deep formations, and verify the quality-preserving coring film-forming process and device. During the dynamic process of coring while drilling, the film-forming single liquid is triggered and released through the static mixing agitator to form the film-forming liquid. The surface of the core is evenly and completely covered, and a layer of solid quality-preserving sealing film with high barrier properties is formed through cross-linking and curing, which protects the core from drilling fluid contamination, and prevents the loss of the material inside the core, so that the taken core can truly reflect the in-situ formation state. , providing guidance for deep resource exploration and development operations, and laying a foundation for deep rock science and deep biology exploration and research.

Embodiment 2: The displacement adjusting device of this embodiment includes an annular piston 21 for pushing the coring barrel 8 to move up and down. The annular piston 21 is sleeved on the end of the central rod 1 extending out of the coring barrel 8. The central rod 1 and the simulation cabin are The annular piston 21 is fixedly connected with the coring barrel 8, the annular piston 21 is slidably connected with the central rod 1, and the annular piston 21 is connected with the liquid injection pump. Before coring: the rock core is placed on the upper part of the core base 24, the quality-preserving coring film-forming device is hoisted on the rock core, and the film-forming A/B liquid is pre-stored in the liquid storage coil A5 and the liquid storage coil B6 respectively. The spring 42 pushes the floating piston 43 to block the outlet of the film-forming A/B liquid to prevent the film-forming A/B liquid from leaking before coring. Before coring, fill the medium liquid in the simulation cabin, use the plunger pump to increase the pressure in the cabin to the deep in-situ pressure, and open the heating jacket 25 to raise the cabin temperature to the deep in-situ temperature. During coring, the medium liquid is injected into the cabin through the liquid injection port 22, and the annular piston 21 is pushed to make the quality-preserving coring device move downward to complete the above-mentioned coring process. After the coring footage is completed, the medium liquid is injected from the liquid discharge port 23, so that the coring barrel 8 moves upward as a whole, and the core claw 11 clamps the core, so that the core is separated from the core base 24 and moves upward together, and the bottom sealing device rebounds to seal the core. bottom.

Embodiment 3: The displacement adjustment device of this embodiment includes a push rod 19 for pushing the coring barrel 8 to move up and down. One end of the push rod 19 extends out of the simulation cabin, the other end is connected to the coring barrel 8, and the push rod 19 is connected to the center. The rod 1 is slidably connected, the push rod 19 is connected with the liquid injection pump, and the central rod 1 is fixed with the simulation cabin. Before coring: the rock core is placed on the upper part of the core base 24, the quality-preserving coring film-forming device is hoisted on the rock core, and the film-forming A/B liquid is pre-stored in the liquid storage coil A5 and the liquid storage coil B6 respectively. The spring 42 pushes the floating piston 43 to block the outlet of the film-forming A/B liquid to prevent the film-forming A/B liquid from leaking before coring. Before coring, fill the medium liquid in the simulation cabin, use the plunger pump to increase the pressure in the cabin to the in-situ pressure in the deep part, open the heating jacket 25 to raise the temperature in the cabin to the in-situ temperature in the deep part; during coring, drive the push rod 19 The quality-preserving coring device is moved downward to complete the above-mentioned coring process; after the coring footage is completed, the push rod 19 is pulled up to move the coring barrel 8 upward as a whole, and the core claws 11 are stuck on the core, so that the core is separated from the core base 24, Moving up together, the bottom seal springs back to seal the bottom of the core.

Embodiment 4: The displacement adjusting device of this embodiment includes a connecting rod 20 for connecting the center rod 1 and the core. The end of the center rod 1 away from the core extends out of the simulation cabin, the center rod 1 is connected to the liquid injection pump, and the coring barrel 8 Fixed with mock cabin. Before coring: The core is placed on the upper part of the core base 24, the quality-preserving coring film-forming device is hoisted on the core, and the film-forming A/B liquid is pre-stored in the liquid storage coil A5 and the liquid storage coil B6 respectively. The spring 42 pushes the floating piston 43 to block the outlet of the film-forming A/B liquid to prevent the film-forming A/B liquid from leaking before coring. Before coring, fill the medium liquid in the simulation cabin, use the plunger pump to increase the pressure in the cabin to the in-situ pressure in the deep part, open the heating jacket 25 to raise the temperature in the cabin to the in-situ temperature in the deep part; When fixed, pull the center rod 1 to move the core upwards into the coring barrel 8 to complete the above-mentioned coring process; after the completion of the coring footage, the core claw 11 jams the core, and the bottom sealing device rebounds to seal the bottom of the core.

Embodiment 5: The simulation cabin of this embodiment includes an outer casing 2, the outer casing 2 is arranged outside the coring cylinder 8, the upper flange 3 is arranged on the top of the outer casing 2, and the lower flange 14 is arranged at the bottom, and the outer casing 2 is also sleeved. A heating jacket 25 is provided for heating the simulation cabin. In this embodiment, the end of the casing 2 close to the upper flange 3 is provided with a liquid injection port 22 for injecting medium liquid, and the end of the casing 2 close to the lower flange 14 is provided with a liquid discharge port 23 for discharging the medium liquid. Liquid A in this embodiment includes epoxy resins or polydimethylsiloxanes, and liquid B includes epoxy curing agents or polymethylhydrogensiloxanes.

Embodiment 6: The liquid storage coil A5 and the liquid storage coil B6 of this embodiment are alternately coiled and arranged in the extrusion cavity, and the number of film-forming liquid release mechanisms 4 is two, and one is used to independently communicate with the liquid storage coil A5 And the mixing coil 9, and the other is used to connect the liquid storage coil B6 and the mixing coil 9 separately. The mixing coil 9 of the present embodiment is provided with a static mixer 91, which is arranged at one end near the liquid inlet of the mixing coil 9, and is used to mix different film-forming single liquids to form a mixed film-forming liquid. The movable assembly of the spring 42 in this embodiment includes a blocking screw 41, a spring 42 and a floating piston 43 arranged in the adjustment cavity. The floating piston 43 communicates with the liquid storage coil A5 and/or the liquid storage coil B6. The side of the adjustment cavity is The wall is provided with a liquid outlet that communicates with the mixing coil 9 , and the liquid outlet is within the moving process of the floating piston 43 .

Embodiment 7: The bottom of the coring barrel 8 in this embodiment is further provided with a bottom sealer 13 , and the bottom sealer 13 is enclosed with the central rod 1 and the coring barrel 8 to form a sampling cavity for accommodating the rock 12 samples. The bottom sealer 13 in this embodiment is an elastic petal-shaped structure, and the end of each petal is fixed on the inner wall of the coring barrel 8 , and the other end faces abut against each other to seal the bottom of the coring barrel 8 . The sampling cavity of the coring barrel 8 in this embodiment is further provided with a core claw 11 for fixing the rock 12 , and the core claw 11 is arranged around the inner wall of the coring barrel 8 . The center rod 1 of this embodiment is provided with a retractable elastic clip 10 , and the retractable elastic clip 10 is used to lock the center rod 1 and the core barrel 8 .

Embodiment 8: The film-forming liquid release mechanism 4 of this embodiment is arranged above the extrusion cavity, the bottom of the liquid storage coil A5 and the liquid storage coil B6 have no openings, and the top is provided with an opening that communicates with the film-forming liquid release mechanism 4 , the mixing coil 9 is arranged at the bottom of the compression part 15 and is fixed on the coring barrel 8, and the outer drill pipe 2 is provided with a first infusion pipe 7 for connecting the mixing coil 9 and the adjustment cavity. The film-forming single liquid includes A and B. If more than two film-forming single liquids are required, more liquid storage coils need to be added. The number of film-forming single liquids and liquid storage coils is not limited to two; Stored in liquid storage coil A5 and liquid storage coil B6. The spring 42 pushes the floating piston 43 to block the outlet of the film-forming A/B liquid to prevent the film-forming A/B liquid from leaking before coring; during coring: the center rod 1 is stationary, the film-forming liquid release mechanism 4 and the coring barrel 8 In the downward movement, the core passes through the bottom seal 13 and enters the coring barrel 8 while drilling. The relative movement of the central rod 1, the film-forming liquid release mechanism 4 and the coring barrel 8 reduces the liquid storage space, and exerts an axial compressive force on the liquid storage coil A5 and the liquid storage coil B6 to deform and discharge them respectively. Film-forming A/B solution. The film-forming A/B liquid squeezes the floating piston 43 and the spring 42 to expose the liquid outlet. The film-forming A/B liquid flows downward through the infusion pipe, collects in the mixing coil 9, and is fully mixed by the static mixer 91 built in the bottom of the mixing coil 9 to form a film-forming liquid with solidifying ability. The film-forming liquid flows out through the inner liquid outlet hole in the upper part of the mixing coil 9 and covers the surface of the newly drilled core. The cross-linking and curing reaction occurs rapidly during film formation, and a solid-state quality-preserving sealing film is formed on the surface of the core. After coring: After completing the coring footage, the elastic clip 10 pops out, so that the relative position between the center rod 1 and the coring barrel 8 is fixed. After the drilling tool is lifted up and the core claw 11 holds the core tightly, the bottom sealer 13 is closed again to prevent a large amount of leakage of the film-forming liquid from the bottom of the core barrel 8 . The film-forming liquid undergoes a cross-linking and solidification reaction in the annular space between the core and the coring barrel 8 and in the space at the top and bottom of the core to form a solid quality-preserving sealing film.

Embodiment 9: This embodiment also provides an in-situ self-triggering method for coring while drilling with film formation and quality assurance, including the following steps: S1: storing liquid A in the liquid storage coil A5, and storing the liquid in the liquid storage coil B6 B, and the film-forming liquid mixed with liquid A and liquid B can be cross-linked and solidified to form a solid protective film; S2: the coring cylinder 8 cores the rock 12, and puts the rock 12 into the closed space; S3: the liquid A and liquid B are input into the mixing coil 9 for mixing to form a film-forming liquid; S4: spray the film-forming liquid on the surface of the rock 12 and fill it into the closed space until the film-forming liquid completely covers the surface of the rock 12; S5: After the film-forming liquid is completely solidified on the surface of the rock 12, the rock 12 is taken out.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. an in-situ self-triggering while drilling film-forming coring simulation device, characterized in that, comprising a simulation cabin and a film-forming device arranged in the simulation cabin and a core base for holding a core, the core The base is arranged at the bottom of the film-forming device, and the film-forming device is provided with a coring barrel and a central rod, the central rod is sealed and telescopically arranged in the coring barrel, and the coring barrel is close to the core base. One end is provided with a sampling cavity for taking cores, a compression part is fixed on the central rod, the compression part is slidably and sealedly connected with the inner wall of the coring barrel, and then the central rod, the coring barrel and the compression part are enclosed to form an extrusion cavity , the extrusion cavity is provided with a liquid storage coil A and a liquid storage coil B for storing liquid A and liquid B, respectively, and a film-forming liquid release mechanism and a mixing coil are also provided on the coring barrel, The film-forming liquid release mechanism includes an adjustment cavity that communicates with the mixing coil, the other end of the adjustment cavity is also connected with a liquid storage coil A and a liquid storage coil B, and the adjustment cavity is provided with a channel for controlling the adjustment cavity. The broken spring movable assembly; the mixing coil is used to mix liquid A and liquid B to form a mixed film-forming liquid, and output the film-forming liquid to the outer surface of the rock sample; Displacement adjustment device for the relative distance between the center rod and the coring barrel; The film-forming liquid release mechanism is arranged above the extrusion cavity, the bottom of the liquid storage coil A and the liquid storage coil B have no openings, and the tops are provided with openings that communicate with the film-forming liquid release mechanism. The coil tube is arranged at the bottom of the compression part and is fixed on the coring barrel, and the coring barrel is provided with a first infusion tube for connecting the mixing coil tube and the adjustment cavity. 2. The in-situ self-triggering coring simulation device for film-forming while drilling with guaranteed quality according to claim 1, wherein the displacement adjusting device comprises an annular piston for pushing the coring barrel to move up and down, and the annular The piston is sleeved on one end of the central rod extending out of the coring barrel, the central rod is fixed with the simulation cabin, and the annular piston is fixedly connected with the coring barrel, and the annular piston is fixed with the coring barrel. The central rod is slidably connected, and the annular piston is connected with the liquid injection pump. 3 . The in-situ self-triggering coring simulation device for film-forming while drilling with guaranteed quality according to claim 1 , wherein the displacement adjusting device comprises a push rod for pushing the coring barrel to move up and down, and the pushing One end of the rod protrudes out of the simulation cabin, the other end is connected with the coring cylinder, the push rod is slidably connected with the central rod, the push rod is connected with the liquid injection pump, and the central rod is fixed with the simulation cabin . 4 . The in-situ self-triggering film-forming-while-drilling quality-preserving coring simulation device according to claim 1 , wherein the displacement adjusting device comprises a connecting rod for connecting a center rod and a core, and the center rod is far away from the core. 5 . One end of the core sticks out of the simulation cabin, the central rod is connected with a liquid injection pump, and the coring barrel is fixed with the simulation cabin. 5. The in-situ self-triggering film-forming-while-drilling quality-preserving coring simulation device according to claim 1, wherein the simulation cabin comprises a casing, the casing is arranged outside the coring barrel, and the top of the casing is arranged There is an upper flange plate, a lower flange plate is arranged at the bottom, and a heating jacket for heating the simulation cabin is also sleeved on the outer shell. 6. The in-situ self-triggering film-forming-while-drilling quality-preserving coring simulation device according to claim 5, wherein an end of the casing close to the upper flange is provided with a liquid injection port for injecting medium liquid, One end of the casing close to the lower flange is provided with a liquid discharge port for discharging the medium liquid. 7 . The in-situ self-triggering film-forming-while-drilling quality-preserving coring simulation device according to claim 1 , wherein the liquid storage coil A and the liquid storage coil B are interlaced and arranged in the extrusion cavity. 8 . , the number of the film-forming liquid release mechanism is two, one is used to connect the liquid storage coil A and the mixing coil independently, and the other is used to independently connect the liquid storage coil B and the mixing coil. 8 . The in-situ self-triggered film-forming-while-drilling quality-preserving coring simulation device according to claim 1 , wherein the liquid A comprises epoxy resins or polydimethylsiloxanes, and the liquid B comprises annular Oxygen curing agent or polymethyl hydrogen siloxane. 9. An in-situ self-triggering method for coring while drilling film-forming quality assurance using the device according to any one of claims 1 to 8, wherein the method comprises the following steps: S1: liquid A is stored in liquid storage coil A, liquid B is stored in liquid storage coil B, and the film-forming liquid after liquid A and liquid B are mixed can be cross-linked and solidified to form a solid protective film; S2: Coring the rock with the coring barrel, and put the rock into the closed space; S3: Input liquid A and liquid B into the mixing coil for mixing to form a film-forming liquid; S4: Spray the film-forming liquid on the rock surface and fill it into the closed space until the film-forming liquid completely covers the rock surface; S5: After the film-forming liquid is completely solidified on the rock surface, the rock is taken out.

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