CN212479214U

CN212479214U - Sand bed probing sampling drilling tool

Info

Publication number: CN212479214U
Application number: CN202020875486.4U
Authority: CN
Inventors: 谢道新; 张莹; 张毅兰
Original assignee: Fujian Huali Survey And Design Co ltd
Current assignee: Fujian Huali Survey And Design Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-02-05
Anticipated expiration: 2030-05-22

Abstract

The utility model discloses a sand drilling sampling drilling tool in the technical field of geological drilling, which comprises a sampling core pipe, wherein the sampling core pipe is a semi-closed pipe with openings at two ends, and the sampling core pipe is connected with a drill rod through a jetting and sucking joint; inhale the sand pipe and inhale husky connecting pipe, sample core tube cover is established and is being inhaled a double-deck hollow cylinder body of external constitution of sand pipe, inhale the inside pipeline of sand pipe for inhaling husky passageway, inhale the annular cavity between sand pipe and the sample core tube and hold the chamber for the sand sample, can not need carry out quick-freeze soil layer, also need not carry out special operation and just can realize the sample of creeping into of husky to use conventional anti-drilling tool that spouts just can, do not need additionally to operate moreover, only need just accomplish according to normal exploration drilling flow operation, the sand sample of taking out is complete clear, easy operation.

Description

Sand bed probing sampling drilling tool

Technical Field

The utility model relates to a geological drilling technical field especially relates to a sand bed probing sample drilling tool.

Background

When a building is constructed, the modeling and the practicability of the foundation and the ground building of the building are designed, the foundation can be designed according to the needs of reference of underground stratum structures and the stability of the stratum, and the underground stratum structures need to be subjected to drilling sampling to make detailed reports and then judged. Stratum sampling is generally carried out by using a core drill, so that sampling levels are the same as underground conditions, and no deviation exists, but the core drill for sampling and exploration can only be used in a stable and firm geological structure, and when the geological structure in the form of loose soil or quicksand is met, the core drill cannot carry out exploration, drilling and sampling at all. The core drill sampling is a cylindrical rock sample taken out from a hole by using an annular core drill and other coring tools according to the requirements of geological exploration work or engineering. The ore-bearing rock or ore taken from the ore body or layer of the solid mineral product is called the core. The core is an important physical geological data for researching and knowing underground geology and mineral conditions.

The rock core is a cylindrical rock sample and is used for knowing underground strata and ore containing characteristics; in the mineral exploration and development process, the drilling work is carried out according to the stratum horizon and depth of geological design, a coring tool is put into a well, a rock sample taken out by drilling is drilled, a rock core is the most visual and practical data for understanding the underground stratum and the ore containing characteristics, two modes of well wall coring and well drilling coring are provided, the latter is usually taken as the main mode, the condition used in the application is well drilling coring, namely well drilling sampling, and the method is used for understanding the geological structure, is convenient for judging and planning the geological conditions in later construction, is used for pertinently constructing different geological conditions, and avoids the occurrence of danger or unpredictable difficulty.

In core drilling, a section of tubular material attached to the upper portion of a drill bit to contain and protect the core is called a core barrel. It also acts as a pilot drill while drilling. The common core tube is only a seamless steel tube with screw threads at two ends, and the diameter of the common core tube is slightly smaller than that of a drill bit by 2-4 mm. The length of a single core tube is 3-45 m, and several core tubes can be connected to prevent the drill hole from being bent, so that the long and large-diameter drilling tool is formed. Special core barrels are often used in particular formations, such as in drilling unconsolidated, fractured formations. Such as double-layered core tubes, which are drilling tools used to extract and protect cores from unconsolidated, fractured formations or coal seams. The double-layer core barrel has two types of double action and single action. The double-acting core barrel is used in loose or broken stratum. The inner pipe and the outer pipe of the single-acting double-layer rock core pipe are isolated by the bearing, the drill rod is only connected with the outer pipe to drive the drill bit to rotate and crush the rock, and the inner pipe does not rotate, so that mechanical damage to friction, vibration and the like of the rock core is avoided, and the drill rod is used in a relatively serious loose and crushed stratum and can well protect the rock core;

the loose sampling of geological conditions such as quicksand type, people generally use a jet-reverse drilling tool, and need to use a double-layer core tube, when drilling to the stratum needing sampling, firstly pumping high-pressure water by using a pump of the jet-reverse drilling tool to soak the underground soil layer, then pouring liquid nitrogen or fluid with lower temperature into a drill rod, pouring the freezing liquid into the stratum to freeze underground substances in the drill bit to form solid, then pumping out the soil layer sample according to the mode of a core by using the drilling machine to sample, so that the operation is complicated and the sampling is difficult, the drill bit and the drill rod are easily damaged due to thermal expansion and cold contraction, and the drill bit can generate heat during subsequent drilling, and the drill bit of the drill rod can also generate cracks due to the fact that cold and hot alternate leads to cracks in an internal steel structure, and the drill bit and the.

Based on this, the utility model designs a sand bed probing sample drilling tool to solve above-mentioned problem.

Disclosure of Invention

An object of the utility model is to provide a sand bed probing sample drilling tool can not need to carry out quick-freeze soil layer, also need not carry out special operation and just can realize the sample of creeping sand that creeps into to use conventional back-flushing drilling tool just can, do not need extra operation moreover, only need just accomplish according to normal exploration drilling flow operation.

The utility model discloses a realize like this: a sand drilling sampling drilling tool comprises a sampling core pipe, wherein the sampling core pipe is a half-closed pipe with two open ends, and the sampling core pipe is connected with a drill rod through a jetting and sucking joint;

the sand suction pipe and the sand suction connecting pipe are arranged in a sleeved mode, the sampling core pipe is sleeved outside the sand suction pipe to form a double-layer hollow cylindrical pipe body, an internal pipeline of the sand suction pipe is a sand suction channel, an annular cavity between the sand suction pipe and the sampling core pipe is a sand sample containing cavity, the sampling core pipe and the sand suction pipe are not in contact with each other, the sampling core pipe and the sand suction pipe are detachably arranged on one side of the sand suction connecting pipe, the sand suction pipe is arranged in the center of the sand suction connecting pipe, the sampling core pipe is inserted into the outer wall of the sand suction connecting pipe, a connecting cavity is formed in the sand suction connecting pipe and communicated with the sand sample containing cavity through the sand suction channel, one side of the sand sample containing cavity is blocked and isolated by the top of the sand suction connecting pipe, and the other side of the sand sample containing cavity is communicated with the jet suction joint;

the inner-layer drill bit is detachably connected to the other side of the sand suction connecting pipe, a sand sample inlet is formed in the inner-layer drill bit and is communicated with the sand suction channel through a connecting cavity of the sand suction connecting pipe, and the sampling core pipe, the sand suction connecting pipe and the inner-layer drill bit form a hollow cylindrical barrel;

outer core barrel and outer drill bit, the connection that outer drill bit can separate through outer core barrel is on penetrating the outer wall that inhales the joint, the cover that outer core barrel and outer drill bit do not contact is established and is formed an annular clearance outside the hollow cylinder barrel that sample core barrel, inhale husky connecting pipe and inlayer drill bit are constituteed, annular clearance is for going out the liquid ring way.

Furthermore, penetrate the cavity pipeline that suction connection had seted up high-pressure flushing channel for one side, high-pressure flushing channel passes through the drilling rod and is connected with outside high-pressure pump, penetrate suction connection's opposite side and seted up the mounting groove that has the internal thread, the opening of mounting groove passes through the inseparable suit of screw thread at sample core barrel top.

Furthermore, a plurality of mutually separated flow guide diffusion holes are uniformly formed in the side wall of the injection joint, a nozzle is detachably mounted in each flow guide diffusion hole, the inlet of each nozzle is communicated with the high-pressure flushing channel, and the outlet and the flow guide diffusion holes of each nozzle are opposite to the liquid outlet loop.

Furthermore, a plurality of mutually isolated suction channels are arranged in the mounting groove, each suction channel is communicated with the side wall of the bottom of one flow guide diffusion hole, the flow guide diffusion holes are not contacted with the nozzle, and the flow guide diffusion holes are communicated with the sand sample accommodating cavity through the suction channels.

Furthermore, the nozzles and the flow guide diffusion holes are obliquely arranged towards the direction of the sampling core barrel, the high-pressure flushing channel, the jetting and sucking joint and the drill rod are arranged on the same axis, the range of the angle A between the outlet axis of each nozzle and the axis of the high-pressure flushing channel is 25-65 degrees, and the number of the nozzles is 2-4.

Furthermore, the sand sample inlet of the inner drill bit and the connecting cavity of the sand suction connecting pipe are both truncated cone-shaped through holes with small upper parts and large lower parts, the included angle C of the sand sample inlet is the same as the included angle B of the connecting cavity, and the included angle of C and B ranges from 10 degrees to 30 degrees.

Further, the outer end of the inner layer drill bit extends out of the outer end of the outer layer drill bit by a length H, the distance range of the extension of H is 100-300mm, and H is preferably 150-200 mm; the length of the sand suction pipe is not more than 1.5m, and the length range of the sand suction pipe is 0.8-1.2 m.

Further, the both ends of sample core pipe all are the external screw thread, sample core pipe is assembled through the mounting groove and the internal thread locking of inhaling husky connecting pipe and is firmly overall structure.

Furthermore, the axes of the injection and suction joint, the outer core tube, the outer drill bit, the sampling core tube, the sand suction connecting tube and the inner drill bit are all the same straight line.

The utility model has the advantages that: the utility model sprays the cooling liquid by using the jet pump of the jet-propelled reverse drilling tool, then the sprayed liquid is sprayed into the liquid outlet loop channel through the diversion diffusion holes by a plurality of nozzles, the cooling liquid is sprayed on the outer drill bit and the inner drill bit to cool the drill bit for drilling, meanwhile, the cooling liquid fluid sprayed at high speed can generate negative pressure when passing through the diversion diffusion holes, the negative pressure enables sand samples to be left in the sand sample accommodating cavity, the sand samples are observed and sampled when the drill bit is kept and taken out conveniently, the operation is very convenient, the operation such as freezing is not carried out, the very troublesome operation is carried out during the freezing operation, the damage to people and equipment is easily caused, and places with deeper distance are more difficult to be frozen, the device is very inconvenient, the operation is simple and practical, the sampling operation is completed when the sand samples are normally drilled, after the sand sample accommodating tube is taken out, only the sand sample accommodating tube which is taken as a semi-closed tube needs to be broken off, the distribution of, need not strike the sample, the husky appearance that takes out also can not mix the chaos that flows, the sample is swift more rapidly, be difficult for makeing mistakes, and this device has used the nozzle of more quantity in addition, just increased suction, make this device suction sufficient, can absorb fine sand, also can absorb comparatively soft soil layer, application scope is wider, and the inlayer drill bit of this device will stretch out longer moreover, drilling flush fluid and original state sand bed have been kept apart, avoid drilling mud to pollute the sample, this device flush fluid closes on the hole bottom, be difficult to cause drilling accidents such as buried drill.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

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

FIG. 2 is a schematic view of the structure of the injection and suction joint of the present invention;

FIG. 3 is a cross-sectional view of the injection and suction joint of the present invention;

FIG. 4 is a schematic view of the utility model of the sampling core tube assembly;

FIG. 5 is a schematic view of the combination of the sampling core tube and the sand suction tube of the present invention;

FIG. 6 is a top view of the sampling core tube and sand suction tube of the present invention;

fig. 7 is a bottom view of the inner layer drill bit and the outer layer drill bit of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-jetting and sucking joint, 11-sucking channel, 12-nozzle, 13-flow guide and diffusion hole, 14-high pressure flushing channel, 15-mounting groove, 2-sampling core tube, 21-sand sample containing cavity, 3-sand sucking tube, 31-sand sucking channel, 4-outer core tube, 5-outer drill bit, 51-liquid outlet loop, 6-inner drill bit, 61-sand sample inlet, 62-drill bit water gap, 63-cutting edge, 7-sand sucking connecting tube and 71-connecting cavity.

Detailed Description

Referring to fig. 1 to 7, the present invention provides a technical solution: a sand drilling sampling drilling tool comprises a sampling core tube 2, wherein the sampling core tube 2 is a half-closed tube with two open ends, and the sampling core tube 2 is connected with a drill rod through a jetting and sucking joint 1;

a sand suction pipe 3 and a sand suction connecting pipe 7, wherein the sampling core pipe 2 is sleeved outside the sand suction pipe 3 to form a double-layer hollow cylindrical pipe body, the inner pipeline of the sand suction pipe 3 is a sand suction channel 31, the annular cavity between the sand suction pipe 3 and the sampling core tube 2 is a sand sample accommodating cavity 21, the sampling core tube 2 and the sand suction tube 3 are not contacted with each other, the sampling core tube 2 and the sand suction tube 3 are both detachably arranged on one side of the sand suction connecting tube 7, the sand suction pipe 3 is arranged at the center of the sand suction connecting pipe 7, the sampling core pipe 2 is inserted in the outer wall of the sand suction connecting pipe 7, a connecting cavity 71 is arranged in the sand suction connecting pipe 7, the connecting cavity 71 is communicated with the sand sample accommodating cavity 21 through a sand suction channel 31, one side of the sand sample accommodating cavity 21 is blocked and isolated by the top of the sand suction connecting pipe 7, and the other side of the sand sample accommodating cavity 21 is communicated with the ejection and suction connector 1;

the inner drill bit 6 is detachably connected to the other side of the sand suction connecting pipe 7, a sand sample inlet 61 is formed in the inner drill bit 6, the sand sample inlet 61 is communicated with the sand suction channel 31 through a connecting cavity 71 of the sand suction connecting pipe 7, and the sampling core barrel 2, the sand suction pipe 3, the sand suction connecting pipe 7 and the inner drill bit 6 form a hollow cylindrical barrel;

outer core barrel 4 and outer drill bit 5, the connection that outer drill bit 5 can separate through outer core barrel 4 is on penetrating the outer wall that inhales joint 1, the cover that outer core barrel 4 and outer drill bit 5 do not contact is established and is being taken a sample core barrel 2, inhale the hollow cylinder barrel that husky connecting pipe 7 and inlayer drill bit 6 constitute and form an annular gap outward, annular gap is out liquid ring way 51, can not need to carry out quick-freeze soil layer, also need not carry out special operation and just can realize the sample of creeping into of quicksand to use conventional anti-drilling tool that spouts just can, need not additionally operate moreover, only need just accomplish according to normal exploration drilling flow operation, the husky appearance of taking out is complete clear, easy operation.

The injection and suction joint 1 is a hollow pipeline with a high-pressure flushing channel 14 formed in one side, the high-pressure flushing channel 14 is connected with an external high-pressure pump through a drill rod, an installation groove 15 with internal threads is formed in the other side of the injection and suction joint 1, the opening of the installation groove 15 is tightly sleeved on the top end of the sampling core tube 2 through threads, the sampling core tube 2 of a half-closed tube is conveniently locked, and the sampling core tube 2 is completely combined when in use;

the side wall of the injection and suction connector 1 is also uniformly provided with a plurality of mutually separated flow guide diffusion holes 13, each flow guide diffusion hole 13 is internally provided with a nozzle 12 in a detachable way, the inlet of each nozzle 12 is communicated with the high-pressure flushing channel 14, the outlet of each nozzle 12 and the flow guide diffusion holes 13 are just opposite to the liquid outlet ring channel 51, the number of the nozzles 12 is increased, the nozzles are uniformly distributed, the rotation stability of a drill bit during high-pressure injection is increased, and the negative pressure suction force in the sampling core barrel 2 is increased;

a plurality of mutually isolated suction channels 11 are also formed in the mounting groove 15, each suction channel 11 is communicated with the side wall of the bottom of one flow guide diffusion hole 13, the flow guide diffusion holes 13 are not contacted with the nozzles 12, the flow guide diffusion holes 13 are communicated with the sand sample accommodating cavity 21 through the suction channels 11, the number of negative pressure channels is increased, namely the overall negative pressure of the sampling core-tube 2 is increased, and more viscous and some loose soil can be sampled;

the nozzles 12 and the diversion diffusion holes 13 are obliquely arranged towards the direction of the sampling core barrel 2, the high-pressure flushing channel 14, the jetting and sucking joint 1 and the drill rod are coaxial, the angle A between the outlet axis of the nozzles 12 and the axis of the high-pressure flushing channel 14 ranges from 25 degrees to 65 degrees, the number of the nozzles 12 is 2 to 4, the strength of negative pressure is increased, if the negative pressure exceeds the range, the negative pressure can be small or is reduced to be difficult to suck quicksand, or the quicksand is difficult to fall and is absorbed into the suction channel 11, and difficulty is caused in sampling;

the sand sample inlet 61 of the inner layer drill bit 6 and the connecting cavity 71 of the sand suction connecting pipe 7 are both truncated cone-shaped through holes with small upper parts and large lower parts, the included angle C of the sand sample inlet 61 is the same as the included angle B of the connecting cavity 71, and the included angle of C and B ranges from 10 degrees to 30 degrees, so that the inner layer drill bit 6 can block cooling liquid, a sand sample is prevented from being polluted by the cooling liquid, the original shape and the integrity of the sample are kept to help, the accuracy of the sand sample is improved, better observation is facilitated, and the suction force is more easily transmitted to the sand at the angle;

the outer end of the inner layer drill bit 6 extends out of the outer end of the outer layer drill bit 5 by a length H, wherein the extending distance range of H is 100-300mm, and H is preferably 150-200 mm; the length of the sand suction pipe 3 is not more than 1.5m, the optimal length range of the sand suction pipe 3 is 0.8-1.2m, drilling holes are not influenced, enough sand samples can be reserved, and sampling is facilitated;

the two ends of the sampling core tube 2 are provided with external threads, the sampling core tube 2 is locked and assembled into a firm integral structure through the mounting groove 15 and the internal threads of the sand suction connecting tube 7, the sampling core tube 2 can be locked into a whole after the installation is finished due to the structure, the sampling core tube 2 can be completely assembled, and sand samples can be completely reserved;

the axes of the injection and suction joint 1, the outer core barrel 4, the outer drill bit 5, the sampling core barrel 2, the sand suction pipe 3, the sand suction connecting pipe 7 and the inner drill bit 6 are all the same straight line, so that the drill bit can not deflect when rotating and can keep uniform and stable rotation.

In a specific embodiment of the present invention:

the embodiment of the utility model provides a through providing a sand bed probing sample drilling tool, the utility model discloses the technical problem that meets is: 1. the core drill is only suitable for harder or more complete geological conditions such as hard rock minerals, soil layers with cohesive property and the like, when sampling is carried out under the geological condition of quicksand, the core drill is very difficult to sample, direct sampling is not basically carried out, a drill bit of the core drill reaches an underground layer needing sampling, when the sampling cavity is filled with fine sand samples, when the drill rod drives the drill bit to lift up for sampling, the flowing sand can flow away, the core samples can not be retained in the sampling space of the drilling tool by the clamping device like rocks, the traditional core drilling machine cannot sample the fine sand, even in loose soil layers, a common drilling machine cannot sample, and in fact many geological conditions are loose, therefore, only the geological condition can be estimated, but the sample cannot be directly observed and the thickness level of the sample cannot be calculated; 2. at present, some methods are used for sampling the solid geological conditions with fluidity, and the current method is that when a sampling cavity of a drilling machine is underground, a sand sample in the sampling cavity of a drill rod is frozen by a quick freezing method, such as liquid nitrogen infusion, the sand sample is not flowed, and then the sample is quickly taken out from the underground, so that the operation is very troublesome, because the sampling is not only one but also needs to be explored at multiple points and is known in detail, and the depth of some drill holes reaches, a large amount of frozen substances are needed to be used for freezing the underground sample, the sample can be thawed and loosened when the sample is taken out, and the freezing liquid flows downwards during freezing, so that the drill bit is also frozen, and when the drilling machine rotates, the drill bit generates heat, so that the cold and hot alternation easily occurs the situation of quenching, and the drill bit and the drill rod are easily damaged; 3. the sampling rate of the rock core can be properly increased by using the jet type reverse circulation drilling tool, the jet type reverse circulation drilling tool can also be used for loose soil, the sampling rate can be greatly reduced, the sampling accuracy is reduced, fluid solid matters such as quicksand and a mud layer with more solid matters cannot be sampled, the cooling water of the jet type reverse circulation drilling tool is flushed from the outside and cooled, and the internal samples are flushed away basically and cannot be sampled.

The utility model discloses followed the operating principle that injection formula reverse circulation drilling tool has an internal suction when drilling, injection formula reverse circulation drilling tool, jet reverse drilling tool for short is one kind and can form local reverse circulation at the bottom of the hole in the rock core probing to improve the drilling tool of rock core rate of taking. It is mounted on the upper end of the core tube, and the main working elements are the spray head and the diffuser. During drilling, flushing fluid is pumped along the drill pipe to the spray head and injected into the diffuser at high speed. This high velocity flow causes a negative pressure to be formed around the eductor finger nozzle 12 and the diffuser. Under the action of pressure difference, the flushing liquid at the bottom of the hole is pumped and ascended and is guided by the bent pipe or the water distribution joint to form local reverse circulation at the bottom of the hole. In 4-6 levels of loose and broken strata and 7-8 levels of hard, brittle and broken strata, the core sampling rate can be improved by drilling with a jet-reverse drilling tool. According to different structures, the jet back drilling tool is divided into a bent pipe type and a water diversion joint type, wherein each type is divided into a single pipe type and a double pipe type. The rinse liquid is sprayed at high velocity into the mixing chamber as it passes through the nozzle 12, creating a low pressure region near the mixing chamber orifice. The flushing fluid at the bottom of the hole rises through the core barrel to the area to compensate for the imbalance, thus forming a reverse circulation effect. The flushing liquid flowing in from the water diversion connector partially flows along the space between the drilling tool and the hole wall and partially flows out of the hole and has a reverse circulation function.

This device has just utilized the reverse circulation suction that the injection formula reverse circulation drilling tool is being washed the production, absorb the fine sand sample through the negative pressure and get into in inhaling husky pipe 3, then because the space that the husky appearance held in chamber 21 is great, suction transform direction flow direction is to suction channel 11 all around, and suction holds the chamber 21 interior buffering reduction at the husky appearance in bigger space, so the husky appearance can drop to the bottom that the husky appearance held chamber 21 because suction is not enough, it catches to be inhaled husky connecting pipe 7, just can simply take a sample.

The realized technical effects are as follows: 1. the device emits high-pressure water flow beams through a high-pressure nozzle 12, the water flow beams pass through a flow guide diffusion hole 13 and enter a liquid outlet loop 51, negative pressure is generated at the flow guide diffusion hole 13 and is transmitted to a sand sample inlet 61 through a suction channel 11, fluid sand samples directly pass through the sand sample inlet 61 and a connecting cavity 71 and are upward under the action of the negative pressure and fall into a sand sample accommodating cavity 21 through a sand suction channel 31, so that sampling is finished, extra operation is not needed at all, irrigation and freezing are not needed and then waiting is needed, the device can be used for geological conditions such as fine sand, flowing solids, loose soil layers and the like, sampling is accurate, sampling is finished while drilling, samples cannot flow away when a drill bit and a drill rod are taken out, and the operation is very convenient and more reliable;

2. each nozzle 12 can generate negative pressure when passing through the flow guide diffusion hole 13 through high-pressure fluid injection, so that the suction force generated by the plurality of nozzles 12 is increased integrally, and the suction effect can be ensured to be absorbed and sucked into the sand sample accommodating cavity 21 even if a viscous sample and a heavy sample are absorbed;

3. utilize inlayer drill bit 6 than outer drill bit 5 more convex design, from going out the inside that liquid ring way 51 spun coolant liquid can not enter into inlayer drill bit 6 like this, the coolant liquid is kept apart in the outside of inlayer drill bit 6 to the coolant liquid can also directly spout and cool down on the inlayer drill bit 6, thereby kept apart drilling flush fluid and original state sand bed, avoided drilling mud to pollute the sample, sample that can be more accurate.

4. Increased layer connecting tube 4 and inhale husky connecting pipe 7, made the flush fluid close on the hole bottom, be difficult to cause drilling accidents such as buried drill, it is more convenient when changing easy wearing and tearing spare inlayer drill bit 6 and outer drill bit 5 moreover.

The embodiment of the utility model provides an in technical scheme for solving above-mentioned problem, the general thinking is as follows:

for better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the embodiments.

The utility model discloses when the preparation installation, with the joint of general injection formula reverse circulation drilling tool, need use double-deck drilling tool to connect, then at the inlayer that connects, from last to cooperating the sample core pipe 2 of this device of installation in proper order down, inhale husky connecting pipe 7 and inlayer drill bit 6, and inhale husky pipe 3 covers and lock together and install and inhale husky connecting pipe 7 top at sample core pipe 2 inner chambers, inhale husky connecting pipe 7 and all have the cylindrical pipeline of annular step for both ends, the one end annular step that inhales husky connecting pipe 7 passes through screw suit locking on sample core pipe 2, the locking that other end annular step that inhales husky connecting pipe 7 can be dismantled has inlayer drill bit 6

The sand suction pipe 3 is locked at the center of the sand suction connecting pipe 7 through threads, the sand suction pipe 3 is further inserted into the inner cavity of the sampling core pipe 2, the sampling core pipe 2 is not in contact with the sand suction pipe 3, the sand suction pipe 3 isolates the whole inner cavity of the sampling core pipe 2 into a sand sample accommodating cavity 21 of an outer ring and a sand suction channel 31 of an inner ring, one end of the sand sample accommodating cavity 21 is completely closed and blocked by an annular step of the sand suction connecting pipe 7, and the other end of the sand sample accommodating cavity 21 is communicated with the ejection and suction connector 1;

the lengths of the sand suction pipe 3 and the sampling core pipe 2 are determined according to the pumping pressure and the pumping quantity used for drilling, and the lengths are not suitable to be too long so as not to influence the sampling effect. In general, the length of the sand suction pipe is not more than 1.5m, preferably 0.8-1.2 m;

the outer layer of the joint is formed by sequentially mounting an outer core barrel 4 and an outer drill bit 5 from top to bottom, ensuring that the outer core barrel 4 and the outer drill bit 5 are sleeved outside the sampling core barrel 2, the sand suction connecting pipe 7 and the inner drill bit 6 in a non-contact manner and are coaxial, completing the mounting, all the connections are locked through threads, an annular sand sample accommodating cavity 21 with an open top is formed among the sampling core barrel 2, the sand suction connecting pipe 7 and the sand suction pipe 3, the top of the sand sample accommodating cavity 21 is communicated with the top of the sand suction pipe 3, the bottom of the sand sample accommodating cavity 21 is blocked and sealed by a top step of the sand suction connecting pipe 7, wherein the sampling core barrel 2 is a semi-closed barrel, as shown in figure 4, when the taken sand sample is observed, the sampling core barrel 2 is horizontally placed, then the sampling core barrel 2 is broken off, the sample is exposed, and the sand sample is required to be inverted, the sand sample holding cavity 21 is a geological sample close to the ground on the side contacting with the sand suction connecting pipe 7, the sample close to one side of the injection and suction joint 1 in the sand sample holding cavity 21 is a geological sample in a deeper position, if the device can be matched with the injection and suction joint 1 to have better use effect, the number of the nozzles 12 in the injection and suction joint 1 of the device is more, and the nozzles are uniformly distributed along the vertical axis of the injection and suction joint 1, so that the whole suction force is larger, the uniform distribution does not influence the rotation of the drill bit, the deflection condition under high-pressure flushing is avoided, each flow guide diffusion hole 13 does not influence each other, the fluid environment is not influenced, the inner angle C of the sand sample inlet 61 is the same as the opening inner angle B of the connecting cavity 71 and ranges from 10 degrees to 30 degrees, and the nozzle 12 of the injection and the inner wall edges of the flow guide diffusion holes 13 of the injection and the sand sample holding cavity 1 are parallel, and the included angle A of the axes of the nozzle 12 and the high-pressure flushing channel 14 is 25-65 degrees, otherwise the flow guide diffusion holes 13 cannot generate negative pressure under the flushing of high-speed water flow.

When the utility model is used, the cooling liquid is sent into the high-pressure flushing channel 14 through the inner hole of the drill rod of the drilling tool by pumping, then the cooling liquid is blocked in the high-pressure flushing channel 14, the pumping of the upper side is ceaselessly pressurized, so that the internal pressure of the high-pressure flushing channel 14 is larger, then the cooling liquid is sprayed out through the nozzles 12 under high pressure, the number of the nozzles 12 is multiple, 2-4 optimal effects are achieved, then the cooling liquid passes through the diversion diffusion holes 13 and cannot stop, the stop can be realized only by the internal blocking of the outer core tube 4 because the high pressure can be forcibly pushed, at the moment, because an annular liquid outlet loop 51 is arranged between the outer core tube 4 and the injection suction connector 1, the high-pressure water flow can continuously downwards pass through the outlet of the liquid outlet loop 51, namely, the gap between the outer drill bit 5 and the inner drill bit 6 flows out, and the negative pressure generated by the diversion, thus, the sand sample accommodating cavity 21 generates suction force, the bottom of the outer ring of the sand sample accommodating cavity 21 is sealed, the sand sample inlet 61 and the connecting cavity 71 are connected in a sealing manner through threads, so that negative pressure is only transmitted from the fine sand channel 31 of the sand suction pipe 3 to the sand sample inlet 61 at the lowest part, the underground flowing sand sample is sucked up by the negative pressure, the sample inside the inner layer drill 6 is not washed by cooling liquid and is in the original state of the soil layer, the cooling liquid is not mixed, the original state is maintained, the fine sand scattered by the inner layer drill 6 flows upwards along the inner channel, as shown in fig. 1, the direction shown by the arrow is the negative pressure direction, the sand sample is remained at the bottom of the sand sample accommodating cavity 21, the outer layer drill 5 and the inner layer drill 6 continue to drill downwards, the sand at the lower layer is continuously sucked upwards, the deep layer sand sample falls in the sand sample accommodating cavity 21 and covers the shallow layer sand sample, along with the continuous deep drilling of the drill bit, deep sand samples can be continuously covered above a shallow layer, so the sand samples are reserved without additional operation, namely the deep drilling is carried out like the original core sampling, the operation is simple, the effect is better, the samples are not easy to mix with cooling liquid to become turbid and sticky, the sampling is more real, the length of the sand suction pipe 3 is not more than 1.5m, the more preferable length range of the sand suction pipe 3 is 0.8-1.2m, after the sand suction pipe 3 is filled with the samples, the drill bit and the drill rod are taken out, the injection and suction connector 1 is detached, the sampling core pipe 2 is separated from the internal thread of the mounting groove 15, the sand suction connecting pipe 7 is turned, the sampling core pipe 2 and the sand suction pipe 3 are separated, then the sampling core pipe 2 is flatly placed, the sampling core pipe 2 is broken, the sand samples are displayed in the sand sample accommodating cavity 21, the operation is clear and the sampling is convenient, refrigeration is not necessary.

The half-closed pipe belongs to common equipment in drilling, as shown in figure 4, a complete pipe is cut along the axis of the circular pipe in a vertical symmetrical mode, then the circular pipe which can be split along the central line is formed by splicing the whole circular pipe and is spliced for use, when the half-closed pipe is broken off, a sample in the half-closed pipe does not need to be moved, so that the original layers of the sample can be kept not to flow, the completeness and the accuracy of the sample are ensured, the core pipe does not need to be like a complete core pipe, the core pipe can only be used in a hard rock layer, the rock needs to be knocked and taken out during sampling, sand is taken out and scattered, the layered distribution of underground sand cannot be identified, and the half-closed pipe needs to be used.

Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.

Claims

1. A sand drilling sampling drilling tool, characterized in that: the sampling core tube (2) is a half-closed tube with openings at two ends, and the sampling core tube (2) is connected with a drill rod through an injection-suction joint (1);

inhale husky pipe (3) and inhale husky connecting pipe (7), sample core tube (2) cover is established and is constituteed a double-deck hollow cylinder body outside inhaling husky pipe (3), the inner tube way of inhaling husky pipe (3) is for inhaling husky passageway (31), inhale annular cavity between husky pipe (3) and sample core tube (2) and hold chamber (21) for the sand sample, sample core tube (2) and inhale husky pipe (3) non-contact, sample core tube (2), inhale that sand tube (3) can all be dismantled install in the one side of inhaling husky connecting pipe (7), inhale the center department that husky pipe (3) were installed and are inhaling husky connecting pipe (7), sample core tube (2) are inserted and are being established in the outer wall of inhaling husky connecting pipe (7), connect chamber (71) have been seted up to the inside of inhaling husky connecting pipe (7), connect chamber (71) hold chamber (21) intercommunication through inhaling husky passageway (31) and sand sample, one side of the sand sample accommodating cavity (21) is blocked and isolated by the top of the sand suction connecting pipe (7), and the other side of the sand sample accommodating cavity (21) is communicated with the ejection and suction joint (1);

the inner drill bit (6) is detachably connected to the other side of the sand suction connecting pipe (7), a sand sample inlet (61) is formed in the inner drill bit (6), the sand sample inlet (61) is communicated with the sand suction channel (31) through a connecting cavity (71) of the sand suction connecting pipe (7), and the sampling core barrel (2), the sand suction pipe (3), the sand suction connecting pipe (7) and the inner drill bit (6) form a hollow cylindrical barrel;

outer core barrel (4) and outer drill bit (5), outer drill bit (5) can separate through outer core barrel (4) and connect on the outer wall of penetrating suction joint (1), the cover that outer core barrel (4) and outer drill bit (5) are contactless forms an annular gap outside the hollow cylinder barrel that sample core barrel (2), inhale husky connecting pipe (7) and inlayer drill bit (6) are constituteed, the annular gap is out liquid circuit (51).

2. A sand drilling sampling drill tool according to claim 1, wherein: penetrate suction connector (1) and seted up the cavity pipeline that high pressure washed passageway (14) for one side, high pressure washed passageway (14) is connected with outside high-pressure pump through the drilling rod, the opposite side that penetrates suction connector (1) has seted up mounting groove (15) that have the internal screw thread, the opening of mounting groove (15) passes through the inseparable suit of screw thread on sample core barrel (2) top.

3. A sand drilling sampling drill tool according to claim 2, wherein: the side wall of the injection and suction connector (1) is also uniformly provided with a plurality of mutually separated flow guide diffusion holes (13), each flow guide diffusion hole (13) is internally provided with a nozzle (12) in a detachable manner, the inlet of each nozzle (12) is communicated with the high-pressure flushing channel (14), and the outlet of each nozzle (12) and the flow guide diffusion holes (13) are opposite to the liquid outlet loop (51).

4. A sand drilling sampling drill tool according to claim 3, wherein: the sand sample accommodating device is characterized in that a plurality of mutually isolated suction channels (11) are further formed in the mounting groove (15), each suction channel (11) is communicated with the side wall of the bottom of one flow guide diffusion hole (13), the flow guide diffusion holes (13) are not in contact with the nozzles (12), and the flow guide diffusion holes (13) are communicated with the sand sample accommodating cavity (21) through the suction channels (11).

5. A sand drilling sampling drill tool according to claim 3, wherein: the nozzles (12) and the flow guide diffusion holes (13) are obliquely arranged towards the direction of the sampling core barrel (2), the high-pressure flushing channel (14), the jetting and sucking joint (1) and the drill rod are arranged on the same axis, the range of the angle A between the outlet axis of the nozzles (12) and the axis of the high-pressure flushing channel (14) is 25-65 degrees, and the number of the nozzles (12) is 2-4.

6. A sand drilling sampling drill tool according to claim 1, wherein: the sand sample inlet (61) of the inner drill bit (6) and the connecting cavity (71) of the sand suction connecting pipe (7) are both truncated cone-shaped through holes with small upper parts and large lower parts, the included angle C of the sand sample inlet (61) is the same as the included angle B of the connecting cavity (71), and the included angle C and the included angle B range from 10 degrees to 30 degrees.

7. A sand drilling sampling drill tool according to claim 1, wherein: the outer end of the inner layer drill bit (6) extends out of the outer end of the outer layer drill bit (5) by a length H, the extending distance range of H is 100-300mm, and H is preferably 150-200 mm; the length of the sand suction pipe (3) is not more than 1.5m, and the length range of the sand suction pipe (3) is 0.8-1.2 m.

8. A sand drilling sampling drill tool according to claim 2, wherein: the both ends of sample core pipe (2) all are the external screw thread, sample core pipe (2) are assembled through mounting groove (15) and the internal thread locking of inhaling husky connecting pipe (7) and are firm overall structure.

9. A sand drilling sampling drill tool according to claim 1, wherein: the axis of the injection and suction joint (1), the outer core barrel (4), the outer drill bit (5), the sampling core barrel (2), the sand suction pipe (3), the sand suction connecting pipe (7) and the inner drill bit (6) are all the same straight line.