CN212458949U - Oil bath type temperature control fidelity corer experiment platform - Google Patents

Abstract

The utility model relates to an oil bath type temperature control fidelity corer experiment platform, which comprises a box body, a temperature control system and a pressure experiment cabin, wherein the pressure experiment cabin is arranged in the box body, and the box body is provided with a liquid inlet, a liquid outlet and a first preformed hole; the temperature control system comprises a liquid supply system and an electric heater, wherein an outlet of the liquid supply system is connected with an inlet of the electric heater, and an outlet of the electric heater is connected with a liquid inlet of the box body; the pressure experiment cabin comprises a first test piece, a second test piece and an intermediate connecting piece, the first test piece is connected with the second test piece through the intermediate connecting piece, and a liquid injection hole is formed in the wall of the intermediate connecting piece. The utility model can simulate high temperature environment, heat the pressure maintaining experiment chamber, provide high temperature environment for the pressure experiment chamber, make the experiment more complete and objective, and make the data more reliable; the utility model discloses utilize the intermediate junction spare to link up the test piece, can avoid drilling on the test piece, prevent to cause the harm to the test piece, can improve the accuracy of experiment.

Description

Oil bath type temperature control fidelity corer experiment platform

Technical Field

The utility model relates to a coring device test system technical field especially relates to oil bath formula temperature control fidelity corer experiment platform.

Background

The mineral resources in the shallow part of the earth are gradually exhausted, and the marching to the deep part of the earth is an important direction of scientific and technological innovation in China in the near term and in the future. The in-situ rock mechanical behavior law of different deep occurrence terranes is the guiding science and theoretical basis of deep drilling, deep resource development and utilization and earth application science.

The characteristics of deep rock such as physical mechanics, chemical biology and the like are closely related to the in-situ environmental conditions, the in-situ environmental loss in the coring process can cause the distortion and the irreversible change of the physicochemical property and the mechanical property of the rock core, and the key of the attack is how to obtain the in-situ rock core under the deep environmental conditions and carry out real-time loading test and analysis under the in-situ fidelity state.

At present, in-situ fidelity coring devices store rock cores in a core storage tube after the rock cores are drilled by a drilling tool, and realize the simulation of the in-situ environment of the rock cores through a pressure maintaining device, a heat preserving device and a moisture preserving device which are connected with the core storage tube. Before core drilling, the pressure maintaining capacity needs to be verified, so that a pressure resistance testing platform of the pressure maintaining cabin is produced.

The pressure resistance test platform of the pressure holding chamber generally comprises a pressure holding experiment chamber, a hydraulic system and the like, and the pressure holding performance of the pressure holding experiment chamber is verified by injecting high-pressure liquid into the pressure holding experiment chamber through the hydraulic system. The existing pressure resistance test platform can only perform pressure experiments, the real in-situ environment is usually a high-temperature environment, the existing pressure resistance test platform cannot simulate the high-temperature environment, and the pressure resistance of the pressure-maintaining cabin in the high-temperature environment cannot be verified.

In addition, the existing pressure maintaining experiment chamber is connected with a hydraulic pipeline by drilling a hole on the cylinder wall, and the drilling of the drilling machine can damage the pressure maintaining experiment chamber, so that the experiment result is unreliable.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an oil bath formula temperature control fidelity corer experiment platform can simulate high temperature environment, does benefit to integrality and the accuracy that improves the experiment.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the oil bath type temperature control fidelity corer experiment platform comprises a box body, a temperature control system and a pressure experiment chamber for simulating a fidelity chamber of a fidelity corer, wherein the pressure experiment chamber is arranged in the box body, and the box body is provided with a liquid inlet, a liquid outlet and a first reserved hole for an experiment pipeline to pass through;

the temperature control system comprises a liquid supply system and an electric heater, wherein an outlet of the liquid supply system is connected with an inlet of the electric heater, and an outlet of the electric heater is connected with the liquid inlet through a liquid inlet pipeline.

Further, the liquid supply system comprises an oil tank and a pump, wherein an outlet of the oil tank is connected with an inlet of the pump, and an outlet of the pump is connected with an inlet of the electric heater.

Furthermore, the liquid outlet is connected with one end of a liquid outlet pipeline, and the other end of the liquid outlet pipeline is connected with the oil tank.

Furthermore, a return pipeline is arranged between the pump and the electric heater, and the return pipeline is communicated with the oil tank.

Further, the outer barrel of the cabin body of the pressure experiment cabin comprises a first test piece, a second test piece and an intermediate connecting piece, the second test piece is located below the first test piece, the intermediate connecting piece connects the first test piece and the second test piece together, and a liquid injection hole is formed in the barrel wall of the intermediate connecting piece.

Preferably, the liquid injection hole is a threaded hole.

Further, the middle connecting piece is in threaded connection with the first test piece and the second test piece.

Further, a flap valve for realizing the sealing closing of the lower end of the pressure experiment chamber is arranged in the second experiment piece; the flap valve comprises a valve seat, a valve clack and an elastic part, one end of the valve clack is movably connected with the outer side wall of the upper end of the valve seat, and the top of the valve seat is provided with a valve port sealing surface matched with the valve clack.

Furthermore, the pressure experiment cabin also comprises a central rod and a core barrel, the lower end of the central rod extends into the core barrel, and a second preformed hole for lifting the central rod is arranged on the box body at a position axially opposite to the central rod;

the lower end of the central rod is provided with an outer step, the upper end of the core barrel is provided with an inner step matched with the outer step, and when the central rod is lifted upwards until the outer step is abutted against the inner step, the central rod can drive the core barrel to synchronously move upwards;

when the core barrel is positioned in the valve seat, the valve clack is opened by 90 degrees and is positioned between the core barrel and the second test piece; when the core barrel is lifted upwards to a certain height through the central rod, the valve clack returns to the top surface of the valve seat under the action of the elastic element and gravity to be in sealing contact with the valve port sealing surface;

when the central rod is lifted to the stroke end, the outer wall of the upper end of the core barrel is in sealing fit with the inner wall of the first test piece.

Further, the oil bath type temperature control fidelity corer experiment platform further comprises a pull rod, and one end of the pull rod is connected with the central rod.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model can simulate high temperature environment, can heat the pressure experiment chamber, can provide high temperature environment for the pressure experiment chamber, and makes the experiment more complete and objective and the data more reliable;

2, the utility model discloses utilize the intermediate junction spare to link up the test piece, can avoid drilling on the test piece, prevent to cause the harm to the test piece, can improve the reliability and the accuracy of experiment.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the interior of the case;

FIG. 3 is a schematic view of the middle pressure experiment chamber of the present invention;

FIG. 4 is a schematic view of the configuration of the holding pressure experiment chamber when the center pole is not lifted;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

FIG. 6 is a schematic view of the configuration of the holding pressure test chamber when the center pole is lifted to the end of travel;

FIG. 7 is a partial enlarged view at B in FIG. 6;

FIG. 8 is a schematic view of the holding pressure experiment chamber when the outer cylinder is disassembled into an upper part and a lower part;

FIG. 9 is a schematic view of the construction of the intermediate link;

FIG. 10 is a schematic view of the pressure experiment chamber with the center pole not lifted;

FIG. 11 is a schematic view of the pressure test chamber with the waveguide lifted to the end of travel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the utility model discloses an oil bath type temperature control fidelity corer experiment platform, which comprises a box body 81, a temperature control system 6 and a pressure experiment chamber 10 for simulating the fidelity cabin of the fidelity corer. The pressure experiment chamber 10 is arranged in a box body 81, a mounting seat 80 is arranged in the box body 81, and the pressure experiment chamber 10 is fixed on the mounting seat 80. Explosion-proof boxes can be selected as the box body 81.

The box 81 is provided with a liquid inlet 812, a liquid outlet 813 and a first preformed hole 810 for the experiment pipeline to pass through. The liquid inlet 812 and the liquid outlet 813 are disposed at opposite sides of the tank 81.

The temperature control system 6 comprises a liquid supply system and an electric heater 611, the liquid supply system comprises an oil tank 61 and a pump 64, an outlet of the oil tank 61 is connected with an inlet of the pump 64, an outlet of the pump 64 is connected with an inlet of the electric heater 611, and an outlet of the electric heater 611 is connected with the liquid inlet 812 through a liquid inlet pipeline 85.

A first filter 63, a first valve 66, and a second valve 67 are installed on a connection pipe between the pump 64 and the electric heater 611. The first valve 66 and the second valve 67 may be pneumatic shut-off valves. The outlet of the pump 64 is provided with a pressure gauge and the outlet of the first filter 63 is provided with a pressure gauge.

The upper side of a connecting pipeline between the pump 64 and the electric heater 611 is connected with a first outer discharge pipeline 68, a second outer discharge pipeline 69 and an emergency pressure relief pipeline, a pneumatic stop valve is installed on the first outer discharge pipeline 68, a manual stop valve is installed on the second outer discharge pipeline 69, a safety valve 612 is installed on the emergency pressure relief pipeline, and when the pressure is too high, the safety valve 612 can be automatically opened, so that the experiment is safer. The emergency pressure relief pipeline is arranged between the first filter 63 and the electric heater 611; first and second outer discharge lines 68, 69 are provided between the pump 64 and the first filter 63.

A second filter 610 and a third valve 62 are installed on a connection pipe between the pump 64 and the oil tank 61, and the third valve 62 can be a manual ball valve. A liquid outlet 813 of the box body 81 is connected with one end of the liquid outlet pipeline 86, and the other end of the liquid outlet pipeline 86 is connected with the oil tank 61.

A return line 65 is provided between the pump 64 and the electric heater 611, one end of the return line 65 is connected to a line between the first valve 66 and the second valve 67, and the other end of the return line 65 opens into the oil tank 61. The pump 64 may alternatively be a variable frequency pump, and the fluid flow rate and hence temperature may be controlled by varying the speed of the pump.

The utility model discloses temperature control's principle:

the oil or water in the oil tank 61 is heated by the pump 64 when flowing through the electric heater 611, then enters the liquid inlet pipeline 85, and enters the box 81 through the liquid inlet 812, so that the pressure experiment chamber 10 in the box 81 is heated externally, and the redundant liquid returns to the oil tank 61 through the liquid outlet 813 and the liquid outlet pipeline 86.

A temperature sensor is arranged in the pressure experiment chamber 10 and/or the box body 81, real-time feedback control of temperature can be carried out, and when the temperature in the pressure experiment chamber 10 reaches the preset temperature, the electric heater 611 is turned off; when the temperature is reduced to a preset value, the electric heater 611 is turned on, so that the temperature of the pressure experiment chamber 10 is maintained within a certain range.

The structure of the pressure experiment chamber in this embodiment will be described in detail.

The pressure experiment chamber 10 has various structures, and can be any pressure chamber structure which can provide a sealed space. The pressure experiment chamber 10 can be a pressure maintaining experiment chamber, and the whole pressure maintaining experiment chamber is a test piece. As shown in fig. 4-7, the pressure-maintaining test chamber in the present embodiment includes an outer cylinder 1, a central rod 2, a core barrel 3, and a flap valve 5 for sealing and closing the lower end of the pressure-maintaining test chamber.

The flap valve 5 comprises a valve seat 51, a valve clack 52 and an elastic part 53, one end of the valve clack 52 is movably connected with the outer side wall of the upper end of the valve seat 51, and the top of the valve seat 51 is provided with a valve port sealing surface matched with the valve clack 52. The elastic member 53 is a spring or a torsion spring.

The lower end of the central rod 2 extends into the core barrel 3, the lower end of the central rod 2 is provided with an outer step 23, the upper end of the core barrel 3 is provided with an inner step 32 matched with the outer step 23, and when the central rod 2 is lifted upwards until the outer step 23 abuts against the inner step 32, the central rod 2 can drive the core barrel 3 to move upwards synchronously. Meanwhile, due to the abutting of the outer step 23 and the inner step 32, sealing can be formed between the outer wall of the central rod 2 and the inner wall of the core barrel 3 at the abutting part.

In order to inject high-pressure liquid into the pressure-holding experimental cabin, a hole needs to be drilled on the outer cylinder 1, which can damage a test piece, so that a split type pressure experimental cabin structure is adopted in another embodiment, the cabin body of the pressure-holding experimental cabin is divided into two parts, the two parts are connected together by using an intermediate connecting piece to form a split type cabin body structure, and then an opening is formed in the intermediate connecting piece to connect an external hydraulic source, so that the test piece is prevented from being drilled and damaged. The detailed structure is as follows:

as shown in fig. 3, the pressure experiment chamber 10 in this embodiment includes a first experiment piece 11, a second experiment piece 12 and an intermediate connection piece 13, the intermediate connection piece 13 is a tubular structure, a liquid injection hole 14 is formed in a tubular wall of the intermediate connection piece 13, and the liquid injection hole 14 is used for externally connecting a hydraulic source, so that a hole can be prevented from being drilled in the experiment piece, and the experiment piece can be prevented from being damaged. To facilitate connection to the fluid line, the fluid injection port 14 is a threaded hole.

The utility model discloses utilize intermediate junction spare 13 to link up the test piece, can avoid drilling on the test piece, prevent to cause the harm to the test piece, therefore can restore the pressure environment of test piece for the test result is more reliable.

As shown in FIG. 1, when the pressure experiment chamber 10 is installed in the housing 81, the liquid injection hole 14 is aligned with the first reserved hole 810 of the housing 81.

In this embodiment, the first test piece 11 is the upper end of the outer cylinder of the holding pressure test chamber, and the second test piece 12 is the lower end of the outer cylinder of the holding pressure test chamber.

As shown in fig. 4 and 6, the outer cylinder 1 is formed by assembling a plurality of threaded sleeves and is used for simulating a drilling machine outer cylinder of an in-situ fidelity coring device. As shown in fig. 8, in the present embodiment, the outer cylinder 1 of the holding pressure test chamber is separated into a first test piece 11 and a second test piece 12 from the screw connection of the outer cylinder 1. One end of the intermediate connecting piece 13 is an internal thread, and the other end is an external thread, so as to realize the threaded connection with the first test piece 11 and the second test piece 12. And a sealing ring 22 is arranged between the middle connecting piece 13 and the first test piece 11 and the second test piece 12, and the sealing performance can be improved by the thread sealing and the sealing ring sealing.

As shown in fig. 4, 5 and 10, in the initial state, the core barrel 3 is positioned at the lower end of the outer cylinder 1 and in the valve seat 51. When the core barrel 3 is located in the valve seat 51, the valve flap 52 opens 90 ° and is located between the core barrel 3 and the second test piece 12; when the core barrel 3 is lifted upwards to a certain height by the central rod 2, the valve clack 52 returns to the top surface of the valve seat 51 under the action of the elastic element 53 and gravity to be in sealing contact with the valve port sealing surface, and the closing of the regulating valve is realized.

As shown in fig. 6, 7 and 11, when the central rod 2 continues to be lifted upward to the end of the stroke, the outer wall of the upper end of the core barrel 3 is in sealing engagement with the inner wall of the first test piece 11.

Two sealing rings 22 are arranged on the outer wall of the upper end of the core barrel 3 to realize sealing with the barrel wall of the first test piece 11. At this time, the outer wall of the central rod 2 and the inner wall of the core barrel 3 form a seal at the abutting part of the outer step 23 and the inner step 32, thereby completing the sealing of the upper end of the outer barrel 1. The lower end of the outer cylinder 1 is closed by a flap valve 5, so that a sealed space for storing a rock core is formed in the outer cylinder 1.

The inner wall of the first test piece 11 is provided with a first limit step 16 for axially limiting the core barrel 3, and when the upper end surface 21 of the core barrel abuts against the first limit step 16, the center rod 2 is lifted to the stroke end.

In order to increase the sealing specific pressure of the flap valve 5, the pressure experiment chamber 10 further comprises a trigger mechanism 4, the trigger mechanism 4 comprises a trigger inner cylinder 41, a trigger block 42 and a trigger spring 43, a through hole is formed in the side wall of the trigger inner cylinder 41, the trigger block 42 is placed in the through hole, and a protruding part 31 matched with the trigger block 42 is arranged on the outer side wall of the bottom of the core cylinder 3; the inner wall of the second test piece 12 is provided with a bypass opening 15 matched with the trigger block 42, the trigger block 42 is positioned above the valve clack 52, and the bypass opening 15 is positioned above the trigger block 42. The bottom of the avoiding opening 15 is provided with a guiding inclined plane which is convenient for the trigger block 42 to slide into the avoiding opening 15 from bottom to top and is also convenient for the trigger block 42 to slide out of the avoiding opening 15 from top to bottom.

The trigger spring 43 is sleeved outside the trigger inner cylinder 41, a shoulder 44 is arranged on the outer wall of the trigger inner cylinder 41, the trigger spring 43 is compressed between the shoulder 44 and the step surface of the inner wall of the second test piece 12, and the trigger spring 43 is positioned above the trigger block 42;

when the core barrel 3 is positioned in the valve seat 51, the trigger inner barrel 41 is positioned between the core barrel 3 and the second test piece 12, the lower end of the trigger inner barrel 41 is matched with a spigot of the valve seat 51, and the trigger block 42 protrudes out of the inner side wall of the trigger inner barrel 41;

when the core barrel 3 is lifted upwards to the first height, the convex part 31 of the core barrel 3 supports against the trigger block 42, so that the trigger inner barrel 41 can be driven to move upwards synchronously;

when the core barrel 3 is continuously lifted upwards to the second height, the trigger block 42 is pushed into the avoidance port 15 by the convex portion 31, so that the trigger block 42 avoids the convex portion 31;

when the core barrel 3 is lifted up to the bottom of the core barrel 3 to cross the avoidance port 15, the trigger block 42 loses the acting force of the core barrel 3, and the trigger inner cylinder 41 drives the trigger block 42 to fall back to press the closed valve clack 52 under the action of gravity and the trigger spring 43.

As shown in fig. 1 and 2, a second prepared hole 811 for pulling the center rod 2 is provided on the case 81 at a position axially opposite to the center rod 2. During the test, be connected pull rod 7 one end with well core rod 2, the pull rod 7 other end passes through second preformed hole 811 and can be connected with outside well core rod actuating mechanism, can test well core rod 2 and flap valve 5 action reliably through promoting well core rod 2. The driving mechanism can be selected from a hydraulic cylinder or an air cylinder, and a piston rod of the hydraulic cylinder or the air cylinder is connected with the pull rod 7.

In use, a high-pressure pipeline of an external pressure supply system is connected with the liquid injection hole 14 on the intermediate connecting member 13 through the first reserved hole 810 on the box body 81.

Lifting the central rod 2 to the stroke end point through a driving mechanism, sealing the inner wall of the core barrel 3 and the central rod 2, and sealing and matching the outer wall of the core barrel 3 and the first test piece 11 to complete the sealing of the upper end of the outer barrel 1; the lower end flap valve 5 realizes the sealing closing of the bottom of the outer cylinder 1, so that a closed environment is formed in the pressure maintaining experiment chamber; then, the center rod 2 is kept at the end of the upper stroke;

then, injecting high-pressure liquid into the closed environment through an external pressure supply system, wherein high-pressure oil or water provided by the external pressure supply system enters an annular space between the outer barrel 1 and the core barrel 3 through a liquid injection hole 14 on the intermediate connecting piece 13, so that the whole closed environment is gradually filled, and the in-situ pressure environment is simulated;

meanwhile, the temperature control system 6 is started to externally heat the pressure experiment chamber 10, and the in-situ temperature environment is simulated.

After the specified time of pressurize heat preservation, the system carries out safe pressure release and cooling, and the specified time of pressurize heat preservation sets up according to the experiment needs.

The utility model discloses can heat the pressure experiment cabin, through simulation high pressure high temperature environment, can test pressurize experiment cabin pressure resistance under high temperature high pressure environment, make the experiment more complete, objective, data are more reliable. The deformation conditions of the cylinder walls of the first test piece 11 and the second test piece 12 can be monitored in the experimental process, and the strength design of the cylinder walls of the first test piece 11 and the second test piece 12 can be verified, so that the fidelity core drilling machine can be structurally and materially improved.

Of course, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and that such changes and modifications are intended to be included within the scope of the appended claims.

Claims (10)

1. Oil bath formula temperature control fidelity corer experiment platform, including the pressure experiment cabin that is used for simulating the fidelity cabin of fidelity corer, its characterized in that: the pressure experiment chamber is arranged in the box body, and a liquid inlet, a liquid outlet and a first preformed hole for an experiment pipeline to pass through are arranged on the box body;

the temperature control system comprises a liquid supply system and an electric heater, wherein an outlet of the liquid supply system is connected with an inlet of the electric heater, and an outlet of the electric heater is connected with the liquid inlet through a liquid inlet pipeline.

2. The oil bath temperature control fidelity corer experimental platform of claim 1, characterized in that: the liquid supply system comprises an oil tank and a pump, wherein an outlet of the oil tank is connected with an inlet of the pump, and an outlet of the pump is connected with an inlet of the electric heater.

3. The oil bath temperature control fidelity corer experimental platform of claim 2, characterized in that: the liquid outlet is connected with one end of a liquid outlet pipeline, and the other end of the liquid outlet pipeline is connected with the oil tank.

4. The oil bath temperature control fidelity corer experimental platform of claim 2, characterized in that: a return pipeline is arranged between the pump and the electric heater and is communicated with the oil tank.

5. The oil bath temperature control fidelity corer experimental platform of claim 1, characterized in that: the outer barrel of the cabin body of the pressure experiment cabin comprises a first test piece, a second test piece and an intermediate connecting piece, wherein the second test piece is positioned below the first test piece, the intermediate connecting piece connects the first test piece and the second test piece together, and a liquid injection hole is formed in the barrel wall of the intermediate connecting piece.

6. The oil bath temperature control fidelity corer experimental platform of claim 5, characterized in that: the liquid injection hole is a threaded hole.

7. The oil bath temperature control fidelity corer experimental platform of claim 5, characterized in that: the middle connecting piece is in threaded connection with the first test piece and the second test piece.

8. The oil bath temperature control fidelity corer experimental platform of claim 5, characterized in that: a flap valve used for realizing the sealing closing of the lower end of the pressure experiment cabin is arranged in the second experiment piece; the flap valve comprises a valve seat, a valve clack and an elastic part, one end of the valve clack is movably connected with the outer side wall of the upper end of the valve seat, and the top of the valve seat is provided with a valve port sealing surface matched with the valve clack.

9. The oil bath temperature control fidelity corer experimental platform of claim 8, characterized in that: the pressure experiment cabin also comprises a central rod and a core barrel, the lower end of the central rod extends into the core barrel, and a second reserved hole for lifting the central rod is arranged on the box body at a position axially opposite to the central rod;

the lower end of the central rod is provided with an outer step, the upper end of the core barrel is provided with an inner step matched with the outer step, and when the central rod is lifted upwards until the outer step is abutted against the inner step, the central rod can drive the core barrel to synchronously move upwards;

when the core barrel is positioned in the valve seat, the valve clack is opened by 90 degrees and is positioned between the core barrel and the second test piece; when the core barrel is lifted upwards to a certain height through the central rod, the valve clack returns to the top surface of the valve seat under the action of the elastic element and gravity to be in sealing contact with the valve port sealing surface;

when the central rod is lifted to the stroke end, the outer wall of the upper end of the core barrel is in sealing fit with the inner wall of the first test piece.

10. The oil bath temperature control fidelity corer experimental platform of claim 9, wherein: the pull rod is connected with the central rod at one end.

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