阅读说明：本技术 一种深部原位环境高温高压模拟舱 (Deep in-situ environment high-temperature and high-pressure simulation cabin ) 是由 张泽天 谢和平 张茹 任利 陈领 高明忠 张志龙 李怡航 杨阳 李佳南 黄伟 于 2021-09-30 设计创作，主要内容包括：本发明公开了一种深部原位环境高温高压模拟舱,其包括试样保真腔,试样保真腔的下端设置有底部油缸,底部油缸的下端设置在底座上,底部油缸内的活塞杆伸入试样保真内,且活塞杆的上端设置有岩样座,试样保真腔的上端设置有岩样盖,试样保真腔的顶部通过保真腔端盖封装,保真腔端盖的上端设置有若干节取芯钻机腔,最上端的取芯钻机腔与提升油缸连接,若干节取芯钻机腔内设置有取芯钻机,取芯钻机穿过中部端盖伸入试样保真腔内。本方案通过模拟深部岩石的赋存环境特征,将岩样放置在试样保真腔内,通过向岩样施加相应的压力和高温,模拟出地层某一深度所处赋存的环境特征,并能根据地层深度的不同进行调节和长期保持。(The invention discloses a high-temperature and high-pressure simulation cabin for a deep in-situ environment, which comprises a sample fidelity cavity, wherein a bottom oil cylinder is arranged at the lower end of the sample fidelity cavity, the lower end of the bottom oil cylinder is arranged on a base, a piston rod in the bottom oil cylinder extends into sample fidelity, a rock sample seat is arranged at the upper end of the piston rod, a rock sample cover is arranged at the upper end of the sample fidelity cavity, the top of the sample fidelity cavity is packaged through a fidelity cavity end cover, a plurality of sections of core drilling machine cavities are arranged at the upper end of the fidelity cavity end cover, the uppermost core drilling machine cavity is connected with a lifting oil cylinder, a core drilling machine is arranged in the plurality of sections of core drilling machine cavities, and the core drilling machine penetrates through a middle end cover and extends into the sample fidelity cavity. According to the scheme, the occurrence environmental characteristics of deep rocks are simulated, the rock sample is placed in the sample fidelity cavity, corresponding pressure and high temperature are applied to the rock sample, the occurrence environmental characteristics of a certain depth of a stratum are simulated, and the rock sample can be adjusted and maintained for a long time according to the difference of the depth of the stratum.)

1. The deep in-situ environment high-temperature and high-pressure simulation cabin is characterized by comprising a sample fidelity cavity, wherein a bottom oil cylinder is arranged at the lower end of the sample fidelity cavity, the lower end of the bottom oil cylinder is arranged on a base, a piston rod in the bottom oil cylinder extends into the sample fidelity cavity, a rock sample seat is arranged at the upper end of the piston rod, a rock sample cover is arranged at the upper end of the sample fidelity cavity, the top of the sample fidelity cavity is packaged through a fidelity cavity end cover, a plurality of sections of core drilling machine cavities are arranged at the upper end of the fidelity cavity end cover, the uppermost core drilling machine cavity is connected with a lifting oil cylinder, a plurality of sections of core drilling machines are arranged in the core drilling machine cavities, and the core drilling machines penetrate through a middle end cover and extend into the sample fidelity cavity; the upper end of the lifting oil cylinder is sealed through an upper end cover, a lifting rod is arranged in the lifting oil cylinder, a lifting piston is arranged at the lower end of the lifting rod, the lower end of the lifting rod is fixedly connected with the upper end of the core drilling machine, and the upper end of the lifting rod penetrates through the upper end cover.

2. The deep in-situ environment high-temperature and high-pressure simulation cabin according to claim 1, wherein a step for placing an upper end cover is arranged at the upper end of the lifting oil cylinder, the lower end of the upper end cover is inserted into the lifting oil cylinder, a sealing ring is arranged between the lower end of the upper end cover and the side surface of the step, and the upper end cover is clamped with the upper end of the lifting oil cylinder through a C-shaped buckle.

3. The deep in-situ environment high-temperature and high-pressure simulation cabin according to claim 1, wherein an expansion portion is arranged at the upper end of the core drilling machine, a step-shaped connector is arranged at the upper end of the expansion portion, a connection cavity is arranged at the upper end of the connector, the connector is inserted into the lower end of the connection cavity, and the lower end of the lifting rod is inserted into the connection cavity.

4. The deep in-situ environment high-temperature and high-pressure simulation cabin according to claim 1, wherein a sealing ring matched with the inner wall of the lifting oil cylinder is arranged on the outer circumference of the lifting piston, and the sealing ring is sleeved in a limiting groove on the lifting piston.

5. The deep in-situ environment high-temperature and high-pressure simulation cabin according to claim 1, wherein the upper end and the lower end of the core drill cavity, the upper end of the core drill cavity and the lower end of the lifting cylinder, and the middle end cover and the sample fidelity cavity are clamped and connected through C-shaped buckles.

6. The deep in-situ environment high-temperature and high-pressure simulation cabin according to claim 1, wherein an installation surface is arranged at the upper end of the middle end cover, the lower end of the core drill cavity is fixed on the installation surface, a first convex ring extending into the core drill cavity is arranged in the middle of the installation surface, and a sealing ring is arranged between the side surface of the first convex ring and the inner wall of the core drill cavity.

7. The deep in-situ environment high-temperature and high-pressure simulation cabin according to claim 1, wherein an annular groove is formed in the lower surface of the middle end cover, a second convex ring is arranged in the middle of the annular groove and extends into a limiting groove from the upper end of the rock sample cover, a third convex ring extending into the annular groove is arranged at the upper end of the sample fidelity cavity, and a sealing ring is arranged between the side face of the third convex ring and the side face of the annular groove.

8. The deep in-situ environment high-temperature and high-pressure simulation cabin according to claim 1, wherein a boss is arranged at the upper end of the base and inserted into the bottom oil cylinder, an oil cylinder piston is arranged at the lower end of the piston rod, and sealing rings are arranged between the oil cylinder piston and the inner wall of the bottom oil cylinder and between the boss and the inner wall of the bottom oil cylinder.

9. The deep in-situ environment high-temperature and high-pressure simulation cabin according to claim 1, wherein the upper end of the piston rod is inserted into a slot formed in the lower end of the rock sample seat, and the piston rod is in interference fit with the slot.

10. The deep in-situ environment high-temperature and high-pressure simulation cabin according to claim 1, wherein a plurality of acoustic emission sensors, transverse ultrasonic sensors, longitudinal ultrasonic sensors and deformation monitoring sensors are arranged in the sample fidelity chamber.

Technical Field

The invention relates to the technical field of deep in-situ coring, in particular to a high-temperature and high-pressure simulation cabin in a deep in-situ environment.

Background

Different from the common burial depth of resources in Europe and America which is less than 2000m, more than 70% of resources in China are buried deeper than 2000m and shallow resources are exhausted, and the resources extend to the deep part at the speed of more than 10m per year. The exploitation depth of oil and gas resources reaches 8418m, the external dependence of petroleum in China reaches 67 percent (2017), and the oil and gas resources far exceed the internationally recognized energy safety warning line (50 percent).

Before the whole set of deep in-situ coring system is applied to field scientific drilling, experimental simulation needs to be carried out indoors in advance to effectively verify the feasibility of equipment and carry out calibration of relevant parameters. The technology of simulating the characteristics of underground deep in-situ rock on the ground to realize parameter research before scientific drilling and parameter debugging of drilling equipment is still blank at home and abroad at present, and a deep in-situ environment high-temperature and high-pressure simulation cabin needs to be designed to simulate the underground deep environment.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the deep in-situ environment high-temperature and high-pressure simulation cabin with a stable structure.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:

the high-temperature and high-pressure simulation cabin for the deep in-situ environment comprises a sample fidelity cavity, wherein a bottom oil cylinder is arranged at the lower end of the sample fidelity cavity, the lower end of the bottom oil cylinder is arranged on a base, a piston rod in the bottom oil cylinder extends into the sample fidelity cavity, a rock sample seat is arranged at the upper end of the piston rod, a rock sample cover is arranged at the upper end of the sample fidelity cavity, the top of the sample fidelity cavity is packaged through a fidelity cavity end cover, a plurality of core drilling machine cavities are arranged at the upper end of the fidelity cavity end cover, the uppermost core drilling machine cavity is connected with a lifting oil cylinder, a core drilling machine is arranged in the plurality of core drilling machine cavities, and the core drilling machine penetrates through a middle end cover and extends into the sample fidelity; the upper end of the lifting oil cylinder is sealed through the upper end cover, a lifting rod is arranged in the lifting oil cylinder, a lifting piston is arranged at the lower end of the lifting rod, the lower end of the lifting rod is fixedly connected with the upper end of the core drilling machine, and the upper end of the lifting rod penetrates through the upper end cover.

Furthermore, the upper end of the lifting oil cylinder is provided with a step for placing an upper end cover, the lower end of the upper end cover is inserted into the lifting oil cylinder, a sealing ring is arranged between the lower end of the upper end cover and the side face of the step, and the upper end cover is clamped with the upper end of the lifting oil cylinder through a C-shaped buckle.

Further, the upper end of coring drill is provided with the inflation portion, and the upper end of inflation portion is provided with the connector of echelonment, and the upper end of connector is provided with the connection chamber, and the connector inserts the lower extreme of connecting the chamber, and the lower extreme of lifter inserts the connection intracavity.

Furthermore, a sealing ring matched with the inner wall of the lifting oil cylinder is arranged on the outer circumference of the lifting piston, and the sealing ring is sleeved in a limiting groove on the lifting piston.

Furthermore, the upper end and the lower end of the two adjacent sections of core drill machine cavities, the upper end of the core drill machine cavity, the lower end of the lifting oil cylinder, the middle end cover and the sample fidelity cavity are clamped through C-shaped buckles.

Furthermore, the upper end of the middle end cover is provided with an installation surface, the lower end of the core drill cavity is fixed on the installation surface, the middle of the installation surface is provided with a first convex ring extending into the core drill cavity, and a sealing ring is arranged between the side surface of the first convex ring and the inner wall of the core drill cavity.

Furthermore, an annular groove is formed in the lower surface of the middle end cover, a second convex ring is arranged in the middle of the annular groove and extends into a limiting groove formed in the upper end of the rock sample cover, a third convex ring extending into the annular groove is arranged at the upper end of the sample fidelity cavity, and a sealing ring is arranged between the side face of the third convex ring and the side face of the annular groove.

Furthermore, a boss is arranged at the upper end of the base and inserted into the bottom oil cylinder, an oil cylinder piston is arranged at the lower end of the piston rod, and sealing rings are arranged between the oil cylinder piston and the inner wall of the bottom oil cylinder and between the boss and the inner wall of the bottom oil cylinder.

Furthermore, the upper end of the piston rod is inserted into a slot formed in the lower end of the rock sample seat, and the piston rod is in interference fit with the slot.

Furthermore, a plurality of acoustic emission sensors, a transverse ultrasonic sensor, a longitudinal ultrasonic sensor, a temperature sensor and a deformation monitoring sensor are arranged in the sample fidelity cavity.

The invention has the beneficial effects that: according to the scheme, the rock sample is placed in the sample fidelity cavity by simulating occurrence environmental characteristics of deep rocks, corresponding pressure and high temperature are applied to the rock sample, the occurrence environmental characteristics (in-situ pressure, temperature and pore pressure) of a certain depth of a stratum are simulated, and the rock sample can be adjusted and maintained for a long time according to different depths of the stratum. The coring drill is driven by the lifting oil cylinder to perform coring action on the rock sample, the working condition of the coring drill under the stratum when coring the rock sample is simulated, and the change condition of the coring process of the coring drill is realized in the high-temperature and high-pressure environment. The simulation experiment device can realize indoor experiment simulation of the fidelity coring device in a simulation test cabin, ensure that a deep in-situ coring system is effectively verified and calibrated before being applied to field scientific drilling, and solve the problem of causing disadvantages in exploring deep ground environment and researching deep rock mechanical behavior.

Drawings

FIG. 1 is a structural diagram of a deep in-situ environment high-temperature high-pressure simulation cabin.

Fig. 2 is a block diagram of a sample fidelity chamber.

Fig. 3 is a structural view of the lift cylinder.

Fig. 4 is a connection structure diagram of the coring drill and the lifting rod.

The core drill comprises an upper end cover 1, an upper end cover 2, a lifting oil cylinder 3, a core drill cavity 4, a middle end cover 5, a sample fidelity cavity 6, a rock sample seat 7, a bottom oil cylinder 8, a piston rod 9, a base 10, a slot 11, a rock sample cover 12, a second convex ring 13, a third convex ring 14, a first convex ring 15, a core drill 16, a lifting rod 17, a lifting piston 18, a connecting cavity 19 and an expansion part.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.

As shown in fig. 1 to 4, deep normal position environment high temperature high pressure simulation cabin of this scheme includes sample fidelity chamber 5, the lower extreme in sample fidelity chamber 5 is provided with bottom hydro-cylinder 7, the lower extreme setting of bottom hydro-cylinder 7 is on base 9, in the piston rod 8 in the bottom hydro-cylinder 7 stretched into the sample fidelity, and the upper end of piston rod 8 is provided with rock sample seat 6, the upper end in sample fidelity chamber 5 is provided with rock sample lid 11, the rock sample is placed between rock sample seat 6 and rock sample lid 11, extrude the rock sample through bottom hydro-cylinder 7 drive rock sample seat 6, exert pressure, realize high pressure environment.

The top of the sample fidelity cavity 5 is packaged through a fidelity cavity end cover, a plurality of core drill cavities 3 are arranged at the upper end of the fidelity cavity end cover, the uppermost core drill cavity 3 is connected with a lifting oil cylinder 2, core drills 15 are arranged in the plurality of core drill cavities 3, and the core drills 15 penetrate through the middle end cover 4 and extend into the sample fidelity; the upper end of the lifting oil cylinder 2 is sealed through the upper end cover 1, a lifting rod 16 is arranged in the lifting oil cylinder 2, a lifting piston 17 is arranged at the lower end of the lifting rod 16, the lower end of the lifting rod 16 is fixedly connected with the upper end of the core drilling machine 15, and the upper end of the lifting rod 16 penetrates through the upper end cover 1.

The upper end of the lifting oil cylinder 2 is provided with a step for placing the upper end cover 1, the lower end of the upper end cover 1 is inserted into the lifting oil cylinder 2, a sealing ring is arranged between the lower end of the upper end cover 1 and the side face of the step, and the upper end cover 1 is clamped with the upper end of the lifting oil cylinder 2 through a C-shaped buckle. The sealing of the lifting oil cylinder 2 is realized through the upper end cover 1.

The upper end of the core drilling machine 15 is provided with an expansion part 19, the upper end of the expansion part 19 is provided with a step-shaped connector, the upper end of the connector is provided with a connecting cavity 18, the connector is inserted into the lower end of the connecting cavity 18, and the lower end of the lifting rod 16 is inserted into the connecting cavity 18. The design of the expansion part 19 ensures the connection strength of the connection part, and meanwhile, the connection head is firmly connected with the design of the connection cavity 18.

And a sealing ring matched with the inner wall of the lifting oil cylinder 2 is arranged on the outer circumference of the lifting piston 17, and the sealing ring is sleeved in a limiting groove on the lifting piston 17. In order to ensure the bidirectional sealing of the lifting oil cylinder 2 and the core drilling machine cavity 3, namely clear water in the core drilling machine cavity 3 cannot enter the lifting oil cylinder 2, hydraulic oil in the lifting oil cylinder 2 cannot enter the core drilling machine cavity 3, a one-way and two-way sealing structure (called as a static sealing ring for short) with a specially designed clamping groove matched with a fluororubber O-shaped ring and an arc-shaped retaining ring is adopted, wherein one side of the arc-shaped retaining ring is processed into an arc shape, can better adapt to the O-shaped ring, and keeps the shape of the arc-shaped retaining ring unchanged under the action of very high pulsating pressure.

The upper end and the lower end of the core drill machine cavity 3, the upper end of the core drill machine cavity 3 and the lower end of the lifting oil cylinder 2, the middle end cover 4 and the sample fidelity cavity 5 are clamped through C-shaped buckles, so that the quick assembly and disassembly are realized.

The upper end of middle part end cover 4 is provided with the installation face, and the lower extreme in core drill chamber 3 is fixed on the installation face, and the middle part of installation face is provided with the first bulge loop 14 that stretches into in core drill chamber 3, is provided with the sealing washer between the side of first bulge loop 14 side and the inner wall in core drill chamber 3, when realizing the sealed of sample fidelity chamber 5, has ensured sealed shape, makes core drill chamber 3 installation stable simultaneously.

The lower surface of middle part end cover 4 is provided with the annular groove, and the middle part of annular groove is provided with second bulge loop 12, and second bulge loop 12 is provided with the sealing washer between the side of third bulge loop 13 and the side of annular groove in stretching into the third bulge loop 13 in the spacing recess that the sample fidelity chamber 5 upper end began into rock specimen lid 11.

The upper end of the base 9 is provided with a boss which is inserted into the bottom oil cylinder 7, the lower end of the piston rod 8 is provided with an oil cylinder piston, and sealing rings are arranged between the oil cylinder piston and the inner wall of the bottom oil cylinder 7 and between the boss and the inner wall of the bottom oil cylinder 7.

In the slot 10 that the lower extreme was seted up was inserted to the upper end of piston rod 8, piston rod 8 and slot 10 interference fit avoided taking place relative rotation between piston rod 8 and the rock specimen seat 6. A plurality of acoustic emission sensors, transverse ultrasonic sensors, longitudinal ultrasonic sensors and deformation monitoring sensors are arranged in the sample fidelity cavity 5. The sample fidelity chamber 5 can carry out tracking test on various basic physical and mechanical properties of rock samples to be drilled at different depths, and can preliminarily realize the pseudo-triaxial simulation of conditions of deep in-situ stress, temperature and pore pressure in the test process.

According to the scheme, the rock sample is placed in the sample fidelity cavity 5 by simulating occurrence environmental characteristics of deep rocks, and corresponding pressure and high temperature are applied to the rock sample, so that the occurrence environmental characteristics (in-situ pressure, temperature and pore pressure) of a certain depth of a stratum are simulated, and the rock sample can be adjusted and maintained for a long time according to the difference of the depths of the stratum. The coring drilling machine 15 is driven by the lifting oil cylinder 2 to perform coring action on the rock sample, the working condition of the coring drilling machine 15 under the stratum when coring the rock sample is simulated, and the change condition of the coring process of the coring drilling machine 15 in the high-temperature and high-pressure environment is simulated. The simulation experiment device can realize indoor experiment simulation of the fidelity coring device in a simulation test cabin, ensure that a deep in-situ coring system is effectively verified and calibrated before being applied to field scientific drilling, and solve the problem of causing disadvantages in exploring deep ground environment and researching deep rock mechanical behavior.