阅读说明：本技术 一种用于大型率定岩样的高温高压环境模拟舱 (High-temperature and high-pressure environment simulation cabin for large calibration rock sample ) 是由 张泽天 谢和平 张茹 高明忠 陈领 张志龙 杨阳 李佳南 黄伟 任利 李怡航 于 2021-09-30 设计创作，主要内容包括：本发明公开了一种用于大型率定岩样的高温高压环境模拟舱,其包括底部油缸,底部油缸的上端固定设置有岩芯舱,底部油缸的活塞杆伸入岩芯舱内,且活塞杆的端部设置有岩样座,岩芯舱的上端设置有中部端盖,中部端盖的上端依次设置有第一钻杆舱、第二钻杆舱和第三钻杆舱,中部端盖与第一钻杆舱之间、第一钻杆舱与第二钻杆舱之间、第二钻杆舱与第三钻杆舱之间均通过固定卡扣结构连接；第三钻杆舱的上端通过上端盖封装。本方案可以在室内模拟深地高温高压环境,给深部原位保真取芯系统提供模拟岩体样本,实现保真取芯器在模拟试验舱中钻取保真岩芯室内实验模拟。(The invention discloses a high-temperature and high-pressure environment simulation cabin for large-scale calibration rock samples, which comprises a bottom oil cylinder, wherein a core cabin is fixedly arranged at the upper end of the bottom oil cylinder, a piston rod of the bottom oil cylinder extends into the core cabin, a rock sample seat is arranged at the end part of the piston rod, a middle end cover is arranged at the upper end of the core cabin, a first drill rod cabin, a second drill rod cabin and a third drill rod cabin are sequentially arranged at the upper end of the middle end cover, and the middle end cover is connected with the first drill rod cabin, the first drill rod cabin is connected with the second drill rod cabin, and the second drill rod cabin is connected with the third drill rod cabin through fixing buckle structures; the upper end of the third drill rod cabin is packaged through an upper end cover. The scheme can simulate a deep high-temperature high-pressure environment indoors, provides a simulated rock sample for a deep in-situ fidelity coring system, and realizes the indoor experimental simulation of drilling the fidelity rock core by the fidelity coring device in the simulation test cabin.)

1. The high-temperature and high-pressure environment simulation cabin for large-scale calibration rock samples is characterized by comprising a bottom oil cylinder, wherein a core cabin is fixedly arranged at the upper end of the bottom oil cylinder, a piston rod of the bottom oil cylinder extends into the core cabin, a rock sample seat is arranged at the end part of the piston rod, a middle end cover is arranged at the upper end of the core cabin, a first drill rod cabin, a second drill rod cabin and a third drill rod cabin are sequentially arranged at the upper end of the middle end cover, and the middle end cover and the first drill rod cabin, the first drill rod cabin and the second drill rod cabin and the third drill rod cabin are connected through fixing buckle structures;

the upper end of third drilling rod cabin is passed through the upper end cover encapsulation, the lower extreme of middle part end cover is provided with the rock sample briquetting, all set up the pressure testing passageway that switches on with the rock core cabin in rock sample briquetting, first drilling rod cabin, second drilling rod cabin, third drilling rod cabin and the middle part end cover, set up the testing channel with the pressure testing passageway intercommunication on the upper end cover, testing channel's upper end is provided with the connector.

2. The environmental simulation chamber for high temperature and high pressure of large rated rock samples according to claim 1, wherein the side surfaces of the first drill rod chamber and the third drill rod chamber are respectively provided with a water outlet channel and a water inlet channel.

3. The high-temperature high-pressure environment simulation cabin for the large-scale calibration rock sample according to claim 1, wherein a first fixing ring protruding out is arranged at the lower end of the core cabin, a second fixing ring protruding out is arranged at the upper end of the bottom oil cylinder, the first fixing ring and the second fixing ring are connected through a C-shaped first buckle, and an annular limiting groove is formed in the outer side face of the first buckle.

4. The high-temperature and high-pressure environment simulation cabin for the large-scale calibration rock sample as claimed in claim 3, wherein a first limiting block is arranged between the lower surface of the first fixing ring and the upper surface of the second fixing ring, and the first limiting block is arranged in a first clamping groove formed in the lower surface of the first fixing ring and the upper surface of the second fixing ring.

5. The high-temperature high-pressure environment simulation cabin for large-scale calibration rock samples according to claim 1, wherein an annular groove is formed in the lower surface of the upper end cover, a protruding portion is arranged in the middle of the groove and inserted into a slot formed in the upper surface of the rock sample pressing block, a gap is formed between the rock sample pressing block and the inner wall of the rock core cabin, a protruding ring is arranged on the upper surface of the rock core cabin and inserted into the groove, a second limiting block is arranged between the lower surface of the upper end cover and the upper surface of the rock core cabin, and the second limiting block is arranged in a second clamping groove formed in the lower surface of the upper end cover and the upper surface of the rock core cabin.

6. The cabin according to claim 5, wherein a plurality of sealing rings are disposed between the side surface of the protrusion and the side surface of the groove, and between the side surface of the protruding ring and the side surface of the groove.

7. The high-temperature and high-pressure environment simulation cabin for the large-scale rated rock sample according to claim 1, wherein the upper ends of the middle end cover, the first drill rod cabin, the second drill rod cabin and the third drill rod cabin are respectively provided with a convex third fixing ring, the lower ends of the first drill rod cabin, the second drill rod cabin, the third drill rod cabin and the upper end cover are respectively provided with a convex fourth fixing ring, and the third fixing ring and the fourth fixing ring are connected through a C-shaped second buckle; the upper end of the third fixing ring is provided with a boss, the lower surface of the fourth fixing ring is provided with a slot, the boss is inserted into the slot, and the outer side surface of the second buckle is also provided with an annular limiting groove.

8. The high-temperature high-pressure environment simulation cabin for the large-scale calibration rock sample of claim 7, wherein the rock sample seat is of a stepped shaft structure with a large upper part and a small lower part, the upper surface of the rock sample seat is provided with a water seepage port, and the water seepage port is connected with a water outlet at the lower end of the rock sample seat through an L-shaped water seepage channel.

Technical Field

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

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, shallow resources are gradually exhausted, and the resources extend to deep parts at the speed of more than 10m every 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 related parameters, and the technology at home and abroad is still blank at present. When the calibration and test of relevant parameters are carried out on the whole set of deep in-situ coring system on the ground, the rock stratum characteristics of the underground deep in-situ need to be simulated on the ground, and the simulation and calibration precision is ensured. However, when the whole deep in-situ coring system is calibrated and tested, a set of stable simulation cabin needs to be built, so that a rock sample can simulate a real underground environment in the simulation cabin.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the high-temperature and high-pressure environment simulation cabin which is stable in structure and used for large calibration rock samples.

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 environment simulation cabin comprises a bottom oil cylinder, wherein a core cabin is fixedly arranged at the upper end of the bottom oil cylinder, a piston rod of the bottom oil cylinder extends into the core cabin, a rock sample seat is arranged at the end part of the piston rod, a middle end cover is arranged at the upper end of the core cabin, a first drill rod cabin, a second drill rod cabin and a third drill rod cabin are sequentially arranged at the upper end of the middle end cover, and the middle end cover is connected with the first drill rod cabin, the first drill rod cabin is connected with the second drill rod cabin, and the second drill rod cabin is connected with the third drill rod cabin through a fixing buckle structure;

the upper end of the third drill rod cabin is packaged through the upper end cover, the lower end of the middle end cover is provided with a rock sample pressing block, a pressure test channel communicated with the rock core cabin is formed in the rock sample pressing block, the first drill rod cabin, the second drill rod cabin, the third drill rod cabin and the middle end cover, a detection channel communicated with the pressure test channel is formed in the upper end cover, and a connecting port is formed in the upper end of the detection channel.

Furthermore, the side surfaces of the first drill rod cabin and the third drill rod cabin are respectively provided with a water outlet channel and a water inlet channel.

Further, the lower extreme in core cabin is provided with convex first solid fixed ring, and the upper end of bottom hydro-cylinder is provided with the solid fixed ring of outstanding second, connects through the first buckle of C shape between first solid fixed ring and the solid fixed ring of second, and the lateral surface of first buckle is provided with annular spacing groove.

Furthermore, a first limiting block is arranged between the lower surface of the first fixing ring and the upper surface of the second fixing ring, and the first limiting block is arranged in a first clamping groove formed in the lower surface of the first fixing ring and the upper surface of the second fixing ring.

Further, the lower surface of upper end cover is provided with annular recess, and the middle part of recess is provided with the protruding portion, and in the protruding portion inserted rock specimen briquetting upper surface was provided with the slot, be provided with the clearance between the inner wall in rock specimen briquetting and the core cabin, the upper surface in core cabin was provided with the bulge loop, and in the bulge loop inserted the recess, be provided with the second stopper between the lower surface in upper end cover and the upper surface in core cabin, the second stopper set up in the second draw-in groove of seting up on the lower surface in upper end cover and the upper surface in core cabin.

Furthermore, a plurality of sealing rings are arranged between the side surface of the protruding part and the side surface of the groove and between the side surface of the convex ring and the side surface of the groove.

Furthermore, the upper ends of the middle end cover, the first drill rod cabin, the second drill rod cabin and the third drill rod cabin are respectively provided with a convex third fixing ring, the lower ends of the first drill rod cabin, the second drill rod cabin, the third drill rod cabin and the upper end cover are respectively provided with a convex fourth fixing ring, and the third fixing rings are connected with the fourth fixing rings through C-shaped second buckles; the upper end of the third fixing ring is provided with a boss, the lower surface of the fourth fixing ring is provided with a slot, the boss is inserted into the slot, and the outer side surface of the second buckle is provided with an annular limiting groove.

Furthermore, the rock sample seat is of a stepped shaft structure with a large upper part and a small lower part, the upper surface of the rock sample seat is provided with a water seepage port, and the water seepage port is connected with a water outlet at the lower end of the rock sample seat through an L-shaped water seepage channel.

The invention has the beneficial effects that: the scheme can simulate a deep high-temperature high-pressure environment indoors, provides a simulated rock sample for the deep in-situ fidelity coring system, realizes the indoor experimental simulation of the fidelity coring device in the simulation test chamber, ensures that the deep in-situ coring system is effectively verified and calibrated before being applied to field scientific drilling, and solves the problems of disadvantages in exploring the deep environment and researching the mechanical behavior of the deep rock.

According to the scheme, the rock sample is arranged in the rock core cabin, and the proper pressure and temperature environment is applied to the rock core cabin, so that reconstruction, automatic adjustment and long-term maintenance of the environmental characteristics (in-situ pressure, temperature and pore pressure) of a certain depth of the stratum are realized in the rock core cabin, and the preset depth environment (temperature, pressure and the like) has the uniformity and the balance and controllability on the time scale on the internal space scale of the rock sample.

Drawings

Fig. 1 is a sectional view of a high-temperature and high-pressure environment simulation cabin for a large calibration rock sample.

Fig. 2 is a block diagram of a core compartment.

Fig. 3 is a connection structure diagram of the first drill pipe compartment and the second drill pipe compartment.

Fig. 4 is a structural view of the third drill rod compartment and the upper end cover.

The drilling machine comprises a drilling machine body, a drilling machine core, a drilling machine body, a drilling machine core, a positioning block, a water inlet channel, a water outlet channel, a water inlet channel, a drilling machine body, a third drilling rod cabin, a fourth fixing ring, a second drilling rod cabin, a water outlet channel, a first drilling rod cabin, a middle end cover, a rock sample pressing block, a rock sample seat, a rock core cabin, a bottom oil cylinder, a first limiting block, a first buckle, a limiting groove, a water seepage port, a gap, a protruding portion, a protruding ring, a third fixing ring, a protruding plate and a base, wherein the upper end cover, the water inlet channel, the third drilling rod cabin, the fourth fixing ring, the second drilling rod cabin, the water inlet channel, the fourth fixing ring, the fourth drilling rod cabin, the second drilling rod cabin, the water outlet channel, the water inlet channel, the fourth water inlet, the fourth water channel, the fourth water inlet channel, the fourth water channel, the.

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, the high-temperature and high-pressure environment simulation cabin for large-scale calibration of rock samples in the scheme comprises a bottom oil cylinder 12, a core cabin 11 is fixedly arranged at the upper end of the bottom oil cylinder 12, a piston rod of the bottom oil cylinder 12 extends into the core cabin 11, a rock sample seat 10 is arranged at the end of the piston rod, a middle end cover 8 is arranged at the upper end of the core cabin 11, a first drill rod cabin 7, a second drill rod cabin 5 and a third drill rod cabin 3 are sequentially arranged at the upper end of the middle end cover 8, the middle end cover 8 is arranged between the first drill rod cabin 7 and the second drill rod cabin 5, and the second drill rod cabin 5 is connected with the third drill rod cabin 3 through a fixing buckle structure.

The upper end of third drilling rod cabin 3 is passed through the encapsulation of upper end cover 1, the lower extreme of middle part end cover 8 is provided with rock sample briquetting 9, first drilling rod cabin 7, second drilling rod cabin 5, the pressure testing passageway that switches on with rock core cabin 11 all is seted up in third drilling rod cabin 3 and the middle part end cover 8, set up the detection passageway with the pressure testing passageway intercommunication on the upper end cover 1, the upper end of detection passageway is provided with the connector, the detection passageway is used for connecting pressure test sensor, examine pressure.

The scheme can simulate a deep high-temperature high-pressure environment indoors, provides a simulated rock sample for the deep in-situ fidelity coring system, realizes the indoor experimental simulation of the fidelity coring device in the simulation test chamber, ensures that the deep in-situ coring system is effectively verified and calibrated before being applied to field scientific drilling, and solves the problems of disadvantages in exploring the deep environment and researching the mechanical behavior of the deep rock.

According to the scheme, the rock sample is arranged in the rock core cabin 11, and by applying a proper pressure and temperature environment to the rock core cabin 11, reconstruction, automatic adjustment and long-term maintenance of the existing environmental characteristics (in-situ pressure, temperature and pore pressure) of a certain depth of the stratum are realized in the rock core cabin 11, so that the preset depth environment (temperature, pressure and the like) has the uniformity and the balance and controllability on the time scale on the internal space scale of the rock sample.

The side surfaces of the first drill rod cabin 7 and the third drill rod cabin 3 are respectively provided with a water outlet channel 6 and a water inlet channel 2.

12 high-temperature-resistant built-in acoustic emission sensors, 2 groups of high-temperature-resistant ultrasonic longitudinal and transverse wave sensors, a fluid outflow pipeline and a fluid inflow pipeline (the working pressure of a fluid injection pump is 140MP), a LVDT axial deformation monitor (the measuring range is 0.1-4 inches, the repetition error is less than 0.6 micron) and other various testing tools can be arranged in the core cabin 11,

the lower extreme of core cabin 11 is provided with convex first solid fixed ring, and the upper end of bottom hydro-cylinder 12 is provided with the solid fixed ring of outstanding second, connects through the first buckle 14 of C shape between first solid fixed ring and the solid fixed ring of second, and the lateral surface of first buckle 14 is provided with annular spacing groove 15.

The sectional design of the four sections of drill rod cabins is an optimal design scheme which is convenient for realizing the quick disassembly after the fidelity coring on the premise of ensuring the enough strength of the whole structure. It should be noted that, a water inlet channel 2 is designed in the middle section of the third drill rod cabin 3, a water outlet channel 6 is designed in the middle section of the first drill rod cabin 7, the two are communicated with each other through the inside of the drill rod cabin, and water flows through a pipeline, so that on one hand, the upper and lower pressure difference can be controlled to provide power for driving the fidelity coring device to drill a rock core, and on the other hand, rock debris generated in the process of drilling the rock core can be flushed away, and the safety of the test is improved.

A first limiting block 13 is arranged between the lower surface of the first fixing ring and the upper surface of the second fixing ring, and the first limiting block 13 is arranged in a first clamping groove formed in the lower surface of the first fixing ring and the upper surface of the second fixing ring, so that relative rotation is avoided.

The lower surface of upper end cover 1 is provided with annular recess, the middle part of recess is provided with protruding portion 18, protruding portion 18 inserts in rock sample briquetting 9 upper surface is provided with the slot, be provided with clearance 17 between the inner wall of rock sample briquetting 9 and core cabin 11, the upper surface of core cabin 11 is provided with bulge loop 19, bulge loop 19 inserts in the recess, be provided with the second stopper between the lower surface of upper end cover 1 and the upper surface of core cabin 11, the second stopper sets up in the second draw-in groove of seting up on the lower surface of upper end cover 1 and the upper surface of core cabin 11.

Sealing rings are arranged between the side surface of the protruding part 18 and the side surface of the groove and between the side surface of the convex ring 19 and the side surface of the groove, so that sufficient sealing is provided.

The upper ends of the middle end cover 8, the first drill rod cabin 7, the second drill rod cabin 5 and the third drill rod cabin 3 are all provided with a convex third fixing ring 20, the lower ends of the first drill rod cabin 7, the second drill rod cabin 5, the third drill rod cabin 3 and the upper end cover 1 are all provided with a convex fourth fixing ring 4, and the third fixing ring 20 is connected with the fourth fixing ring 4 through a C-shaped second buckle; the upper end of the third fixing ring 20 is provided with a boss 21, the lower surface of the fourth fixing ring 4 is provided with a slot, the boss 21 is inserted into the slot, the outer side surface of the second buckle is provided with an annular limiting groove 15, and when enough structural strength is ensured, quick assembly and disassembly are realized.

The rock sample seat 10 is of a stepped shaft structure with a large upper part and a small lower part, the upper surface of the rock sample seat 10 is provided with a water seepage port 16, and the water seepage port 16 is connected with a water outlet at the lower end of the rock sample seat 10 through an L-shaped water seepage channel. The whole rock sample seat 10 adopts the design that the diameter of the upper part is large and the diameter of the lower part is small, and the diameter change is realized structurally. Wherein the lower part adopts cladding structure design, makes the structure firm, reaches the effect of preventing changeing when coring really, and upper surface design has infiltration mouth 16 for rock specimen lower surface pore pressure and other surfaces keep balance in the test process.