阅读说明：本技术 配合极地空气钻进取芯式旋喷钻头随钻检测冰芯介电性质的装置 (Device for detecting dielectric property of ice core while drilling by matching with polar air drilling coring type rotary jet drill bit ) 是由 张楠 王亮 范晓鹏 帕维尔达拉拉伊 宫达 刘昀忱 王婷 洪嘉琳 于 2019-11-13 设计创作，主要内容包括：一种配合极地空气钻进取芯式旋喷钻头随钻检测冰芯介电性质的装置,其上部连接体与冰芯管连接；上部连接体具有上轴承座,上轴承座内镶嵌上推力球轴承,上推力球轴承下端安装有轴承挡环,下轴承座上安装下推力球轴承,钻头体与轴承挡环连接,钻头体与轴承挡环能同步转动,冰芯管的内部具有冰芯扶正器；冰芯管具有导线通孔、低位电极、中间环状间隙、高位电极和保护电极；钻头体的壁上具有导流气体凸起、冰芯卡断器、高压空气导流孔、底唇面空气导流孔,刀头固定在钻头体底部。本发明可以随着钻进检测冰芯的介电性质,配合高压空气旋喷钻进避免了液体对测量精度的影响。钻头体单动,上部冰芯管等不转动,增加了钻具的稳定性。(A device for detecting the dielectric property of an ice core while drilling by matching with a polar air drilling coring type rotary jet drill bit is characterized in that an upper connector of the device is connected with an ice core pipe; the upper connecting body is provided with an upper bearing seat, an upper thrust ball bearing is embedded in the upper bearing seat, the lower end of the upper thrust ball bearing is provided with a bearing baffle ring, a lower thrust ball bearing is arranged on a lower bearing seat, a bit body is connected with the bearing baffle ring, the bit body and the bearing baffle ring can synchronously rotate, and an ice core centralizer is arranged in the ice core pipe; the ice core pipe is provided with a lead through hole, a low-level electrode, a middle annular gap, a high-level electrode and a protective electrode; the wall of the drill bit body is provided with a gas guide bulge, an ice core snap, a high-pressure air guide hole and a bottom lip surface air guide hole, and the cutter head is fixed at the bottom of the drill bit body. The invention can detect the dielectric property of the ice core along with drilling, and avoids the influence of liquid on the measurement precision by matching with high-pressure air rotary jet drilling. The drill body is single-acting, and the ice core pipe and the like on the upper part do not rotate, so that the stability of the drilling tool is improved.)

1. The utility model provides a cooperation polar region air drilling coring formula jet drill follow-drilling detects device of ice core dielectric property which characterized in that: the ice core protective device comprises an upper connector (1), an upper bearing seat (2), an upper thrust ball bearing (3), a lower thrust ball bearing (20), a bearing retainer ring (4), a lower bearing seat (5), a bit body (6), a guide gas protrusion (7), an ice core snap (8), a high-pressure air guide hole (9), a bottom lip surface air guide hole (10), a bit (11), a screw (12), an ice core pipe (13), a lead through hole (14), a low-position electrode (15), a middle annular gap (16), a high-position electrode (17), a protective electrode (18) and an ice core centralizer (19);

the upper connector (1) is in threaded connection with the ice core pipe (13);

the lower part of the upper connector (1) is provided with an upper bearing seat (2), an upper thrust ball bearing (3) is embedded in the upper bearing seat (2), the lower end of the upper thrust ball bearing (3) is provided with a bearing retaining ring (4), the lower bearing seat (5) at the lower end of the bearing retaining ring (4) is provided with a lower thrust ball bearing (20), the lower bearing seat (5) is arranged on the drill bit body (6), the drill bit body (6) is in threaded connection with the bearing retaining ring (4), the drill bit body (6) and the bearing retaining ring (4) can synchronously rotate, the upper connector (1) is not in contact with the drill bit body (6) and the bearing retaining ring (4), single-action of the drill bit body (6) is realized due to the arrangement of the upper thrust ball bearing (3) and the lower thrust ball bearing (20), and the upper drilling tool.

The ice core centralizer (19) is arranged inside the ice core pipe (13); the ice core pipe (13) is provided with a lead through hole (14), a low-level electrode (15), a middle annular gap (16), a high-level electrode (17) and a protective electrode (18); the wall of the bit body (6) is provided with a gas guide bulge (7), an ice core snap (8), a high-pressure air guide hole (9) and a bottom lip surface air guide hole (10), and a cutter head (11) is fixed at the bottom of the bit body (6) through a screw (12).

2. The device for detecting the dielectric property of the ice core while drilling by matching with the polar air drilling coring type rotary jet drill bit as claimed in claim 1, is characterized in that: the low-level electrode (15) in the ice core tube (13) is insulated by a polytetrafluoroethylene material, and the high-level electrode (17) is fixed on the polytetrafluoroethylene material by an insulating substance; the protective electrode (18) is not connected with the high-position electrode (17) to prevent short circuit; the low-level electrode (15) is fixed in the groove of the protective electrode (18) by using low-temperature-resistant insulating glue, and is integrated with the protective electrode (18) but insulated from the protective electrode (18); a specially-made coaxial cable is led out from the centers of the high-position electrode (17) and the low-position electrode (15) respectively and is connected to the LCR tester; after the high-position electrode (17) and the low-position electrode (15) are electrified, a power line and a data communication line, namely a coaxial cable are uploaded to an LCR detector on the ground surface through the lead through hole (14) to collect ice core detection signals.

3. The device for detecting the dielectric property of the ice core while drilling by matching with the polar air drilling coring type rotary jet drill bit as claimed in claim 1, is characterized in that: the low-position electrode (15) and the high-position electrode (17) are similar to a jump ring type low-position electrode.

4. The device for detecting the dielectric property of the ice core while drilling by matching with the polar air drilling coring type rotary jet drill bit as claimed in claim 1, is characterized in that: the ice core centralizer (19) is a circlip-like elastic device.

Technical Field

The invention relates to a device capable of measuring the dielectric property of an ice core while drilling, in practical application, core-taking type rotary jet drilling can be used for taking the ice core without drilling fluid, and a detection device while drilling can be used for measuring the dielectric property of the ice core without taking the ice core to the ground surface.

Background

The ice core of the Antarctic continent is of great importance to people, and the substance components in the ice core can be analyzed from the obtained ice core, so that the important information of the evolution of the earth ancient climate can be obtained. Since the ice core drilling activity is carried out in the south Pole in 2012 of China, the drilling footage and the ice core drilling amount are greatly advanced, but the technology in the aspects of ice core detection and control analysis is not mature, the defects that the test means is single, foreign equipment is relied on, the in-situ nondestructive test cannot be carried out and the like exist, and a nondestructive and high-resolution ice core test method is urgently needed to be developed by self to quickly and accurately obtain the composition and the content of substances in the ice core. At present, the method for testing the ice core at home and abroad only stays in taking the ice core to the ground surface for measurement, which causes a great deal of distortion of the ice core data. If the ice core drills to a brittle ice area, highly compressed air bubbles are arranged in the ice core and are taken to the ground surface, and the ice core is very easy to break. The ice core can be directly measured by measurement while drilling, and the data distortion of the ice core can not be caused.

Disclosure of Invention

The invention provides a device for detecting the dielectric property of an ice core while drilling by matching with a polar region air drilling coring type rotary jet drill bit.

A device for detecting dielectric properties of an ice core while drilling by matching with a polar region air drilling coring type rotary jet drill bit comprises an upper connector, an upper bearing pedestal, an upper thrust ball bearing, a lower thrust ball bearing, a bearing retainer ring, a lower bearing pedestal, a drill bit body, a diversion gas bulge, an ice core snap, a high-pressure air diversion hole, a bottom lip surface air diversion hole, a cutter head, a screw, an ice core pipe, a lead through hole, a low-level electrode, a middle annular gap, a high-level electrode, a protective electrode and an ice core centralizer;

the upper connector is in threaded connection with the ice core pipe;

the lower part of the upper connecting body is provided with an upper bearing seat, an upper thrust ball bearing is embedded in the upper bearing seat, the lower end of the upper thrust ball bearing is provided with a bearing retaining ring, the lower bearing seat at the lower end of the bearing retaining ring is provided with a lower thrust ball bearing, the lower bearing seat is arranged on the drill bit body, the drill bit body is in threaded connection with the bearing retaining ring, the drill bit body and the bearing retaining ring can synchronously rotate, the upper connecting body is not in contact with the drill bit body and the bearing retaining ring, single action of the drill bit body is realized due to the arrangement of the upper thrust ball bearing and the lower thrust ball bearing.

The ice core centralizer is arranged inside the ice core pipe; the ice core pipe is provided with a lead through hole, a low-level electrode, a middle annular gap, a high-level electrode and a protective electrode; the low-level electrode in the ice core tube is insulated by a polytetrafluoroethylene material, and the high-level electrode is fixed on the polytetrafluoroethylene material by an insulating substance; the guard electrode 18 is not connected to the upper electrode, thereby preventing a short circuit. The low-level electrode is fixed in the groove of the protective electrode by low-temperature resistant insulating glue, and is integrated with the protective electrode but insulated from the protective electrode. And special coaxial cables are led out from the centers of the high-position electrode and the low-position electrode respectively and are connected to the LCR tester. After the high-level electrode and the low-level electrode are electrified, the power line and the data communication line, namely the coaxial cable, are uploaded to the LCR detector on the ground surface through the lead through hole, and the ice core detection signal is collected.

The wall of the drill bit body is provided with a gas guide bulge, an ice core snap, a high-pressure air guide hole and a bottom lip surface air guide hole, and the cutter head is fixed at the bottom of the drill bit body through a screw.

The low-position electrode and the high-position electrode are similar to a jump ring type low-position electrode.

The ice core centralizer is a circlip-like elastic device.

When the high-pressure air drives the drill bit body to rotate, the cutter head cuts an ice layer, generated ice scraps can be blown to the ground surface by the high-pressure air from the high-pressure air diversion hole on the bottom lip surface, and meanwhile, the high-pressure air can cool the drill bit. The upper thrust ball bearing and the lower thrust ball bearing are limited by an upper bearing seat and a lower bearing seat in the upper connecting body, a bearing retaining ring is arranged between the upper thrust ball bearing and the lower thrust ball bearing to limit the upper thrust ball bearing and the lower thrust ball bearing, the bearing retaining ring is in threaded connection with the drill bit body to realize the single rotation of the drill bit body, and the ice core pipe at the upper part does not rotate.

The equipment can realize drilling into the ice layer without drilling fluid, thereby reducing the influence of the liquid on the dielectric property of the ice core. The ice core measuring device is matched with an air coring type rotary jet drill bit to drill downwards so as to detect the ice core.

The working process of the invention is as follows:

when drilling downwards, firstly, the whole drilling tool is lowered by using an earth surface winch until the drilling tool is contacted with a snow layer or an ice layer, then a high-pressure air pipeline passes through the side wall of the ice core pipe and then passes through an upper connecting body, the side wall of an upper bearing seat and the side wall of a bearing retaining ring, then high-pressure air is sent into the drill bit body, when the high-pressure air passes through a high-pressure gas bulge, the drill bit is driven to rotate clockwise, the high-pressure air is continuously sprayed out of the drill bit from a high-pressure gas guide hole and a bottom lip face air guide hole, the high-pressure air sprayed out of the high-pressure gas guide hole is sprayed to the hole wall and also drives the drill bit body and a cutter head to perform clockwise rotary cutting drilling, the. At the moment, the bit body keeps synchronous rotation due to threaded connection with the bearing retaining ring, the upper connecting body is not in contact with the bit body and the bearing retaining ring, single action of the bit body is realized due to the existence of the upper thrust ball bearing and the lower thrust ball bearing, and an upper drilling tool does not rotate in the drilling process.

After a period of drilling, the ice core can enter the ice core pipe, at the moment, the ice core can prop open the ice core centralizer located on the base, and the upper part of the ice core pipe is protruded to limit the ice core centralizer. At the moment, the ice core measuring device can tightly hold the ice core, so that the high-position electrode and the low-position electrode can be in seamless contact with the ice core, the test precision is improved, and the influence of other media in the middle of the polar plate is eliminated. Due to the presence of the guard electrode, the influence of parasitic capacitance is also eliminated. The low-level electrode in the ice core tube is insulated by polytetrafluoroethylene material, and the high-level electrode is fixed on the polytetrafluoroethylene material by insulating material. The protective electrode is not connected with the high-position electrode, so that short circuit is prevented. The low-level electrode is fixed in the groove of the protective electrode by low-temperature resistant insulating glue, and is integrated with the protective electrode but insulated from the protective electrode. And special coaxial cables are led out from the centers of the high-position electrode and the low-position electrode respectively and are connected to the LCR tester. After the high-low level electrodes are electrified, the power line and the data communication line, namely the coaxial cable, are uploaded to the LCR detector on the ground surface through the lead through hole, and ice core detection signals are collected.

During drilling, high-pressure air passes through the bottom lip surface of the drill bit, ice chips at the bottom of the hole can be removed, and the ice chips can return upwards along a gap between the drill rod and the hole wall. The device for collecting ice scraps is omitted, a large amount of space is saved, a large amount of ice cores can be collected, and then a large amount of ice cores are detected.

The invention has the beneficial effects that:

the ice core can be obtained by driving the drill bit body to rotate by using high-pressure air, wherein the drill bit is a core bit. During drilling, the high-low electrodes arranged in the ice core pipe can realize measurement of the ice core while drilling. The dielectric property of the ice core is detected and is transmitted to an LCR instrument on the ground surface for display through 485 bus communication. Therefore, measurement while drilling is realized, the ice core does not need to be taken to the ground surface for measurement, and the influence of drilling liquid on the measurement precision is avoided. A large amount of working strength is reduced, and the working precision is also improved.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a perspective view of the ice core tube of the present invention.

Fig. 4 is a cross-sectional view of an ice core tube of the present invention.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, a device for detecting dielectric properties of an ice core while drilling by matching with a polar region air drilling coring type rotary jet drill bit, comprises an upper connecting body 1, an upper bearing seat 2, an upper thrust ball bearing 3, a lower thrust ball bearing 20, a bearing baffle ring 4, a lower bearing seat 5, a drill body 6, a guide gas protrusion 7, an ice core blocking device 8, a high-pressure air guide hole 9, a bottom lip surface air guide hole 10, a cutter head 11, a screw 12, an ice core pipe 13, a lead through hole 14, a low-level electrode 15, a middle annular gap 16, a high-level electrode 17, a protective electrode 18 and an ice core centralizer 19;

the upper connector 1 is in threaded connection with the ice core pipe 13;

the lower part of the upper connector 1 is provided with an upper bearing seat 2, an upper thrust ball bearing 3 is embedded in the upper bearing seat 2, the lower end of the upper thrust ball bearing 3 is provided with a bearing retaining ring 4, the lower bearing seat 5 at the lower end of the bearing retaining ring 4 is provided with a lower thrust ball bearing 20, the lower bearing seat 5 is arranged on the drill bit body 6, the drill bit body 6 is in threaded connection with the bearing retaining ring 4, the drill bit body 6 and the bearing retaining ring 4 can synchronously rotate, the upper connector 1 is not in contact with the drill bit body 6 and the bearing retaining ring 4, single action of the drill bit body 6 is realized due to the arrangement of the upper thrust ball bearing 3 and the lower thrust ball bearing 20, and an.

The ice core tube 13 is internally provided with an ice core centralizer 19; the ice core pipe 13 is provided with a lead through hole 14, a low-level electrode 15, a middle annular gap 16, a high-level electrode 17 and a protective electrode 18; the low-level electrode 15 in the ice core pipe 13 is insulated by polytetrafluoroethylene materials, and the high-level electrode 17 is fixed on the polytetrafluoroethylene materials by insulating substances; the guard electrode 18 and the high-potential electrode 17 are not connected to each other, and short-circuiting is prevented. The low-level electrode 15 is fixed in the groove of the protective electrode 18 by low-temperature resistant insulating glue, and is integrated with the protective electrode 18 but insulated from the protective electrode 18. A special coaxial cable is led out from the center of each of the high-position electrode 17 and the low-position electrode 15 and connected to the LCR tester. After the high-position electrode 17 and the low-position electrode 15 are electrified, a power line and a data communication line, namely a coaxial cable are uploaded to an LCR detector on the ground surface through the lead through hole 14, and ice core detection signals are collected.

The wall of the bit body 6 is provided with a gas guide bulge 7, an ice core snap 8, a high-pressure air guide hole 9 and a bottom lip surface air guide hole 10, and a cutter head 11 is fixed at the bottom of the bit body 6 through a screw 12.

The low electrode 15 and the high electrode 17 are similar to a jump ring type low electrode.

The ice core centralizer 19 is a circlip-like elastic device.

When the high-pressure air drives the drill bit body 6 to rotate, the cutter head 11 cuts an ice layer, the generated ice scraps are blown to the ground surface by the high-pressure air from the high-pressure air diversion holes 9 on the bottom lip surface, and meanwhile, the high-pressure air can cool the drill bit. The upper thrust ball bearing 3 and the lower thrust ball bearing 20 are limited by the upper bearing seat 2 and the lower bearing seat 5 in the upper connecting body 1, a bearing retaining ring 4 is arranged between the upper thrust ball bearing 3 and the lower thrust ball bearing 20 to limit the upper thrust ball bearing and the lower thrust ball bearing, and meanwhile, the bearing retaining ring 4 is in threaded connection with the bit body 6, so that the single rotation of the bit body 6 can be realized, and the upper ice core tube 13 does not rotate.

The equipment can realize drilling into the ice layer without drilling fluid, thereby reducing the influence of the liquid on the dielectric property of the ice core. The ice core measuring device is matched with an air coring type rotary jet drill bit to drill downwards so as to detect the ice core.

The working process of the embodiment:

when the drilling tool drills downwards, the whole drilling tool is firstly lowered by using a surface winch until the drilling tool is contacted with a snow layer or an ice layer, then a high-pressure air pipeline passes through the side wall of an ice core pipe 13 and then passes through the upper connecting body 1, the side wall of an upper bearing seat 2 and the side wall of a bearing retaining ring 4, then high-pressure air is sent into a drill bit body 6, when the high-pressure air passes through a high-pressure gas bulge 7, the drill bit is driven to rotate clockwise, the high-pressure air is continuously sprayed out of the drill bit from a high-pressure gas guide hole 9 and a bottom lip surface air guide hole 11, the high-pressure air sprayed out of the high-pressure gas guide hole 9 is sprayed to the hole wall, the drill bit body 6 and a cutter head 11 are also driven to perform clockwise rotary cutting drilling. At the moment, the bit body 6 keeps synchronous rotation due to threaded connection with the bearing retaining ring 4, the upper connecting body 1 is not in contact with the bit body 6 and the bearing retaining ring 4, single action of the bit body 6 is realized due to the existence of the upper thrust ball bearing 3 and the lower thrust ball bearing 20, and an upper drilling tool does not rotate in the drilling process.

After a period of drilling, the ice core enters the ice core tube 13, at the moment, the ice core can prop open the ice core centralizer 19 located on the base, and the upper part of the ice core tube protrudes to limit the ice core centralizer 19. At the moment, the ice core measuring device can tightly hold the ice core, so that the high-position electrode 17 and the low-position electrode 15 can be in seamless contact with the ice core, the test precision is improved, and the influence of other media in the middle of the polar plate is eliminated. The influence of parasitic capacitance is also eliminated due to the presence of the guard electrode 18. The low electrode 15 in the ice core tube is insulated by polytetrafluoroethylene material, and the high electrode 17 is fixed on the polytetrafluoroethylene material by insulating material. The guard electrode 18 and the high-potential electrode 17 are not connected to each other, and short-circuiting is prevented. The low-level electrode 15 is fixed in the groove of the protective electrode 18 by low-temperature resistant insulating glue, and is integrated with the protective electrode 18 but insulated from the protective electrode 18. A special coaxial cable is led out from the center of each of the high-position electrode 17 and the low-position electrode 15 and connected to the LCR tester. After the high-low level electrodes are electrified, the power line and the data communication line, namely the coaxial cable, are uploaded to the LCR detector on the ground surface through the lead through hole 14, and ice core detection signals are collected.

During drilling, high-pressure air passes through the bottom lip surface of the drill bit, ice chips at the bottom of the hole can be removed, and the ice chips can return upwards along a gap between the drill rod and the hole wall. The device for collecting ice scraps is omitted, a large amount of space is saved, a large amount of ice cores can be collected, and then a large amount of ice cores are detected.