A vibratory direct-push sampling drill and its sampling method

Abstract

This invention relates to a vibratory direct-push sampling drill and its sampling method. The vibratory direct-push sampling drill includes an outer drill pipe, and also includes an inner drill rod and a sampling tube, which can be selectively placed inside the outer drill pipe. When the inner drill rod is placed inside the outer drill pipe, it can close the lower opening of the outer drill pipe. When the sampling tube is placed inside the outer drill pipe, it can connect to the lower opening of the outer drill pipe to form a soil entry channel. It also includes a retrieval and lifting mechanism that can be placed inside the outer drill pipe and detachably connected to the inner drill rod or sampling tube placed inside the outer drill pipe. The retrieval and lifting mechanism is used to lift the inner drill rod or sampling tube to detach it from the outer drill pipe. Its advantages are that it can simultaneously achieve multiple sampling methods. The entire sampling process does not require extracting the outer drill pipe underground, avoiding soil collapse and backfilling of the borehole after extracting the outer drill pipe, which would cause soil layering and affect the accuracy of soil samples obtained during subsequent sampling. It also saves time on multiple extractions and deployments of the sampling tube, as well as multiple connections and disconnections of the sampling tube.

Description

Technical Field

[0001] This invention relates to the field of soil sampling technology, and in particular to a vibratory direct-push sampling drill and its sampling method. Background Technology

[0002] Environmental surveys involve drilling into the soil using a drilling rig to collect samples. Analysis of these samples yields data on soil pollutants to assess the extent of pollution and support the development of environmental remediation plans. The sampling process requires strict control over sample disturbance and chemical interference. Currently, a common method for soil sampling is static pressure direct thrust combined with impact vibration and a non-circulating fluid method.

[0003] Existing sampling drills generally consist of an outer drill pipe and an inner tube placed inside the outer drill pipe. During use, the sampling drill is inserted into the soil, and soil samples are obtained through the inner tube. Due to the limited length of the outer and inner drill pipes, when sampling at greater depths, multiple outer and inner drill pipes must be repeatedly connected to the top of the underground outer and inner drill pipes during the drilling process. At the end of sampling, all multiple outer and inner drill pipes must be raised to the surface to retrieve the soil sample from the inner tube. Furthermore, when continuing to obtain soil samples, it is necessary to repeatedly insert outer and inner drill pipes, one after another, into the borehole. Therefore, existing sampling drills require multiple deployments and connections of the inner and outer drill pipes, and all of the outer and inner drill pipes must be lifted to obtain soil samples. This sampling process is complex, cumbersome, time-consuming, labor-intensive, and inefficient. Moreover, lifting the outer drill pipe to the ground can easily cause soil collapse at the borehole wall, filling the borehole and creating soil layers of different depths, which affects the accuracy of obtaining soil samples when sampling again. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a vibratory direct-push sampling drill and its sampling method, which solves the technical problems of existing sampling drills requiring multiple deployments and connections of inner and outer drill pipes, and the need to lift all outer and inner drill pipes to obtain soil samples. This sampling process is complex, cumbersome, time-consuming, labor-intensive, and inefficient. Furthermore, it addresses the technical problem that lifting the outer drill pipe to the ground can easily lead to soil collapse at the borehole wall, filling the borehole and causing soil mixing at different depths, which affects the accuracy of obtaining soil samples during subsequent sampling.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, embodiments of the present invention provide a vibratory direct-push sampling drill bit, including an outer drill pipe.

[0009] It also includes an optional inner drill pipe and sampling tube placed inside the outer drill pipe;

[0010] When the inner drill pipe is placed inside the outer drill pipe, the inner drill pipe can close the lower opening of the outer drill pipe;

[0011] When the sampling tube is placed inside the outer drill pipe, the sampling tube can connect to the lower opening of the outer drill pipe to form a soil entry channel;

[0012] It also includes a retrieval and lifting mechanism that can be placed inside the outer drill pipe and is detachably connected to the inner drill rod or sampling tube placed inside the outer drill pipe. The retrieval and lifting mechanism is used to lift the inner drill rod or sampling tube to detach it from the outer drill pipe.

[0013] According to the present invention, the inner drill pipe includes a rod body, and a plug cone is provided at the lower end of the rod body. The cone end of the plug cone can extend out of the lower opening of the outer drill pipe.

[0014] According to the present invention, a sealing element is fitted on the circumferential wall of the plugging cone, and the sealing element is used to seal the gap between the circumferential wall of the plugging cone and the inner wall of the lower opening of the outer drill pipe.

[0015] According to the present invention, a tubular external drill bit is provided at the lower end of the external drill pipe, and the inner wall of the external drill bit is stepped.

[0016] The lower part of the sampling tube can extend into the outer drill bit, and the lower end of the sampling tube is fitted with the stepped surface of the inner wall of the outer drill bit.

[0017] The lower end of the sampling tube is equipped with a one-way soil inlet device, which allows soil to enter the sampling tube from the lower opening of the outer drilling tube in one direction and can also seal the lower opening of the sampling tube.

[0018] According to the present invention, the unidirectional soil-feeding component includes a full-claw retaining spring;

[0019] The full claw retaining spring includes a connecting ring coaxially arranged with the sampling tube and located inside the sampling tube, and a plurality of arc-shaped strips spaced circumferentially at the end of the connecting ring and extending toward the inner cavity of the sampling tube.

[0020] Multiple arc-shaped strips can open under soil pressure, allowing soil to enter the sampling tube unidirectionally from the lower opening of the outer drill pipe; and,

[0021] Multiple curved strips can be brought together to close the lower opening of the sampling tube.

[0022] According to the present invention, it further includes a connection component, the connection component comprising:

[0023] The sampling tube connector has a detachable connection at its lower end to the upper end of the sampling tube.

[0024] The salvage and lifting mechanism includes a spring clip bracket joint assembly, which can be mounted on the top of a seat ring located on the inner wall of the outer drill pipe;

[0025] The spring-loaded clip connector assembly can be threaded onto the upper part of the sampling tube connector. Tightening the spring-loaded clip connector assembly can raise or lower the sampling tube via the sampling tube connector; or...

[0026] The spring clip bracket assembly can be threaded onto the upper part of the inner drill pipe, and turning the spring clip bracket assembly can drive the inner drill pipe to rise and fall.

[0027] According to the present invention, the connecting assembly further includes a nut sleeved and threadedly connected to the upper part of the sampling tube connector or the upper part of the inner drill rod, the nut being located below the spring clip connector assembly;

[0028] The connecting assembly also includes a spring washer fitted onto the upper part of the sampling tube connector or the upper part of the inner drill rod, with the spring washer located between the nut and the spring clip connector assembly.

[0029] According to the present invention, the spring clip holder connector assembly includes a spring clip holder connector and a spring clip holder, wherein the spring clip holder connector is sleeved and threadedly connected to the sampling tube connector or the inner drill rod;

[0030] The lower part of the cartridge holder is detachably connected to the upper part of the cartridge holder connector. A suspension ring is sandwiched between the lower peripheral wall of the cartridge holder and the upper peripheral wall of the cartridge holder connector. The suspension ring can be hung on the top of the seat ring.

[0031] The cartridge holder is a hollow cylindrical body. From top to bottom, cartridge holder limiting blocks and cartridge clamps are arranged inside the cartridge holder. The cartridge holder limiting block includes two limiting blocks, which are inserted into the first elongated hole extending axially on the peripheral wall of the cartridge holder by means of pins. The cartridge clamp includes two clamp bodies, which are inserted into the through holes on the peripheral wall of the cartridge holder by means of pins. The free ends of the two limiting blocks are hinged to the free ends of the two clamp bodies respectively.

[0032] The upper end of the spring sleeved on the outer periphery of the spring clip frame abuts against the spring baffle connected to the top of the spring clip frame, and the lower end of the spring abuts against the free ends of the two limiting blocks to drive the free ends of the two limiting blocks to open, so that the free ends of the two clamps can extend out of the second elongated hole located on the peripheral wall of the spring clip frame along its axial direction and extend into the annular spring clip chamber opened on the inner peripheral wall of the outer drill pipe.

[0033] According to the present invention, the salvage and lifting mechanism further includes:

[0034] The retrieval tube is sleeved outside the spring clamp holder. The peripheral wall of the retrieval tube extends axially and has an elongated hole for the free ends of the limit blocks and the spring clamp to extend out. The pins inserted on the two limit blocks are also inserted into the through hole in the upper part of the peripheral wall of the retrieval tube.

[0035] The device includes a spearhead holder connected to the upper part of the recycling pipe and a spearhead extending into and connected to the top groove of the spearhead holder. A positioning pin is provided in the top groove, and a positioning spring is fitted around the outer periphery of the positioning pin. The top end of the positioning spring abuts against the bottom end of the pin of the positioning pin, and the bottom end of the positioning spring abuts against the bottom wall of the top groove. The positioning spring drives the top end of the positioning pin to abut against the bottom plane of the spearhead.

[0036] Secondly, embodiments of the present invention also provide a sampling method for a vibratory direct-push sampling drill.

[0037] When continuous sampling from the ground to the subsurface is required, the following steps are included:

[0038] A1: Connect the salvage and lifting mechanism to the upper part of a sampling tube, and place the salvage and lifting mechanism together with the sampling tube inside the outer drill pipe;

[0039] A2: When drilling with the outer drill pipe, the soil enters the sampling pipe through the lower opening of the outer drill pipe. When the drilling reaches the same depth as the sampling pipe, the sampling pipe is lifted by the retrieval and lifting mechanism to detach from the outer drill pipe. The sampling pipe is then removed from the retrieval and lifting mechanism to obtain the soil sample inside the sampling pipe.

[0040] A3: Drill an external drill pipe into the ground based on the soil sampling depth; or connect one or more external drill pipes to the top of the underground external drill pipe.

[0041] Meanwhile, depending on the soil sampling depth, steps A1 and A2 are performed once or repeatedly to obtain soil samples at the sampling depth.

[0042] When it is necessary to drill underground to take samples, the following steps are included:

[0043] B1: Connect the retrieval and lifting mechanism to the upper part of the inner drill pipe, and place the retrieval and lifting mechanism together with the inner drill pipe inside the outer drill pipe. The inner drill pipe closes the lower opening of the outer drill pipe.

[0044] B2: The outer drill pipe and the inner drill rod are drilled synchronously to the depth to be sampled. After the inner drill rod is lifted off the outer drill pipe by the retrieval and lifting mechanism, the inner drill rod is removed from the retrieval and lifting mechanism.

[0045] B3: Connect the salvage and lifting mechanism to the upper part of a sampling tube, and place the salvage and lifting mechanism together with the sampling tube inside the outer drill pipe;

[0046] B4: When drilling with the outer drill pipe, the soil enters the sampling pipe through the lower opening of the outer drill pipe. When the drilling reaches the same depth as the sampling pipe, the sampling pipe is lifted by the retrieval and lifting mechanism to detach from the outer drill pipe. The sampling pipe is then removed from the retrieval and lifting mechanism to obtain the soil sample inside the sampling pipe.

[0047] B5: Depending on the soil sampling depth, perform or repeat steps B3 and B4 once or multiple times to continuously obtain soil samples at the sampling depth.

[0048] B6: Repeat steps B1-B5 to alternate drilling and sampling underground.

[0049] (III) Beneficial Effects

[0050] The beneficial effects of this invention are as follows: This vibratory direct-push sampling drill can simultaneously achieve continuous sampling operations from the ground to the subsurface, continuously obtain soil samples at a certain depth after drilling, and perform multiple sampling methods, alternating between drilling and sampling after drilling to a certain depth, thus meeting different sampling needs. Furthermore, the external drill pipe does not need to be removed from the ground during the entire sampling process. The external drill pipe continuously supports the borehole wall formed by drilling, preventing soil collapse at the borehole wall after removing the external drill pipe, which could cause soil layering at different depths and affect the accuracy of soil samples obtained during subsequent sampling. It also avoids the low efficiency caused by re-inserting the external drill pipe into the borehole and having to re-drill. Finally, it avoids the need to lift the entire external drill pipe to the surface, remove the sampling tube, and then re-insert it into the borehole after each sampling, thus reducing sampling efficiency. Meanwhile, after sampling is completed, the sampling tube can be easily and quickly lifted by the retrieval and lifting mechanism to obtain soil samples from the sampling tube. When sampling continues, the retrieval and lifting mechanism can place another sampling tube back into the outer drill pipe. This eliminates the need to repeatedly connect one or more sampling tubes to the top of the sampling tube to adapt to the sampling depth, and also eliminates the need to lift multiple sampling tubes to the ground to obtain soil samples and then drop and connect them one by one into the outer drill pipe after sampling. This saves time on lifting and dropping multiple sampling tubes and connecting and disassembling them multiple times, thus simplifying the sampling process, improving sampling efficiency, and shortening sampling time. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the inner drill rod of the vibratory direct-push sampling drill tool of the present invention placed inside the outer drill pipe;

[0052] Figure 2 This is a schematic diagram showing the sampling tube of the vibratory direct-push sampling drill of the present invention placed inside the outer drill pipe;

[0053] Figure 3 for Figure 2 A schematic diagram of the one-way soil inlet component.

[0054] [Explanation of Labels in the Attached Image]

[0055] 1: External drill pipe; 11: External drill bit; 111: Step surface; 12: Seat ring; 13: Spring clip chamber; 14: Spring clip stop; 15: Spring clip chamber component; 16: External drill tool; 17: Seat ring cavity;

[0056] 2: Internal drill pipe; 21: Rod body; 22: Core plug; 23: Seal;

[0057] 3: Sampling tube; 31: One-way soil inlet component; 311: Connecting ring; 312: Arc-shaped strip;

[0058] 4: Salvage and lifting mechanism; 41: Spear clip bracket connector assembly; 411: Spear clip bracket connector; 412: Spear clip bracket; 4121: First elongated hole; 413: Suspension ring; 414: Spear clip limiting block; 4141: Limiting block; 415: Spear clip clamp; 416: Spring baffle; 417: Recovery tube; 4171: Elongated hole in recovery tube; 42: Spear head seat; 421: Top groove; 422: Elongated hole in spear head seat; 423: Spear head seat pin; 43: Spear head; 44: Positioning stop pin; 45: Positioning spring; 46: Spear head pin; 47: Spring;

[0059] 5: Connecting assembly; 51: Sampling tube connector; 52: Nut; 53: Spring washer. Detailed Implementation

[0060] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "upper," "lower," "left," and "right" are used interchangeably. Figure 1 The orientation is used as a reference.

[0061] See Figure 1-3 The present invention provides a vibratory direct-push sampling drill, which includes an outer drill pipe 1, an inner drill rod 2, a sampling pipe 3, and a retrieval and lifting mechanism 4.

[0062] Specifically, the inner drill rod 2 and the sampling tube 3 can be optionally placed inside the outer drill pipe 1. When the inner drill rod 2 is placed inside the outer drill pipe 1, it can close the lower opening of the outer drill pipe 1. When the sampling tube 3 is placed inside the outer drill pipe 1, it can connect to the lower opening of the outer drill pipe 1 to form a soil inlet channel. The retrieval and lifting mechanism 4 can be placed inside the outer drill pipe 1 and is detachably connected to the inner drill rod 2 or the sampling tube 3 placed inside the outer drill pipe 1. The retrieval and lifting mechanism 4 is used to lift the inner drill rod 2 or the sampling tube 3 to detach it from the outer drill pipe 1.

[0063] Furthermore, the sampling method of this vibratory direct-push sampling drill is as follows:

[0064] When continuous sampling from the ground to the subsurface is required, the following steps are included:

[0065] A1: Connect the salvage and lifting mechanism 4 to the upper part of a sampling tube 3, and place the salvage and lifting mechanism 4 together with the sampling tube 3 inside the outer drill pipe 1;

[0066] A2: When the outer drill pipe 1 is drilling, the soil enters the sampling pipe 3 through the lower opening of the outer drill pipe 1. When the outer drill pipe 1 is drilled to the same length depth as the sampling pipe 3, the sampling pipe 3 is lifted by the retrieval and lifting mechanism 4 to get off the outer drill pipe 1. The sampling pipe 3 is then removed from the retrieval and lifting mechanism 4 to obtain the soil sample inside the sampling pipe 3.

[0067] A3: Drill an external drill pipe 1 into the ground according to the soil sampling depth; or, connect one or more external drill pipes 1 to the top of the external drill pipe 1 located underground.

[0068] Meanwhile, depending on the soil sampling depth, steps A1 and A2 are performed once or repeatedly to obtain soil samples at the sampling depth.

[0069] When it is necessary to drill underground to take samples, the following steps are included:

[0070] B1: Connect the retrieval and lifting mechanism 4 to the upper part of the inner drill rod 2, and place the retrieval and lifting mechanism 4 together with the inner drill rod 2 inside the outer drill pipe 1, with the inner drill rod 2 sealing the lower opening of the outer drill pipe 1;

[0071] B2: The outer drill pipe 1 and the inner drill rod 2 are drilled synchronously to the sampling depth. After the inner drill rod 2 is lifted off the outer drill pipe 1 by the retrieval and lifting mechanism 4, the inner drill rod 2 is removed from the retrieval and lifting mechanism 4.

[0072] B3: Connect the salvage and lifting mechanism 4 to the upper part of a sampling tube 3, and place the salvage and lifting mechanism 4 together with the sampling tube 3 inside the outer drill pipe 1;

[0073] B4: When the outer drill pipe 1 is drilling, the soil enters the sampling pipe 3 through the lower opening of the outer drill pipe 1. When the drilling reaches the same depth as the sampling pipe 3, the sampling pipe 3 is lifted by the retrieval and lifting mechanism 4 to get off the outer drill pipe 1. The sampling pipe 3 is then removed from the retrieval and lifting mechanism 4 to obtain the soil sample inside the sampling pipe 3.

[0074] B5: Depending on the soil sampling depth, perform or repeat steps B3 and B4 once or multiple times to obtain soil samples at the sampling depth.

[0075] B6: Repeat steps B1-B5 to alternate drilling and sampling underground. Drilling here refers to the simultaneous drilling of the outer drill pipe 1 and the inner drill pipe 2 when the inner drill pipe 2 is placed inside the outer drill pipe 1; sampling refers to the simultaneous drilling of the outer drill pipe 1 and sampling of the sampling pipe 3 when the sampling pipe 3 is placed inside the outer drill pipe 1.

[0076] As can be seen from the above, this vibratory direct-push sampling drill can simultaneously achieve continuous sampling operations from the ground to the subsurface, continuously obtain soil samples at a certain depth after drilling to a certain depth, and perform multiple sampling methods such as alternating drilling and sampling after drilling to a certain depth. Furthermore, the outer drill pipe 1 does not need to be removed from the ground during the entire sampling process. The outer drill pipe 1 continuously supports the borehole wall formed by drilling, preventing soil collapse at the borehole wall after removing the outer drill pipe 1, which could cause soil mixing at different depths and affect the accuracy of soil samples obtained during subsequent sampling. It also avoids the low efficiency caused by re-inserting the outer drill pipe 1 into the borehole and having to re-drill, and avoids the need to lift the entire outer drill pipe 1 to the surface, remove the sampling tube 3, and then re-insert it into the borehole after each sampling, thus reducing sampling efficiency. Meanwhile, after sampling is completed in the sampling tube 3, the sampling tube 3 can be easily and quickly lifted by the retrieval and lifting mechanism 4 to obtain soil samples from the sampling tube 3. When sampling continues, the retrieval and lifting mechanism 4 can place the sampling tube 3 and another sampling tube 3 back into the outer drill pipe 1. It is not necessary to repeatedly connect one or more sampling tubes 3 to the top of the sampling tube 3 to adapt to the sampling depth, nor is it necessary to lift all the sampling tubes 3 to the ground to obtain soil samples and then put them into the outer drill pipe 1 one by one and connect them. This saves the time of lifting and placing multiple sampling tubes 3 and connecting and disassembling the sampling tubes 3 multiple times, thereby simplifying the sampling process, improving sampling efficiency, and shortening sampling time.

[0077] Specifically, two adjacent external drill pipes 1 are threaded together.

[0078] Furthermore, the internal drill pipe 2 includes a pipe body 21.

[0079] A plugging cone 22 is provided at the lower end of the rod body 21. The conical end of the plugging cone 22 can extend out of the lower opening of the outer drill pipe 1, and the conical end of the plugging cone 22 can drill synchronously with the outer drill pipe 1. One or more sealing elements 23 are sleeved on the circumferential wall of the plugging cone 22. The sealing elements 23 are used to seal the gap between the circumferential wall of the plugging cone 22 and the inner wall of the lower opening of the outer drill pipe 1, preventing soil from entering the gap between the circumferential wall of the plugging cone 22 and the inner wall of the lower opening of the outer drill pipe 1. Optionally, the sealing element 23 is an O-ring or other sealing element.

[0080] Furthermore, a tubular external drill bit 11 is provided at the lower end of the external drill pipe 1, which is used for drilling. Specifically, the external drill bit 11 is conical, and its upper end extends upward to form an annular connecting portion. The connecting portion is used for detachable connection with the external drill pipe 1 to facilitate maintenance and disassembly.

[0081] Specifically, the connecting part is provided with an external thread, the connecting part is inserted into the lower end of the outer drill pipe 1 and threadedly connected to the lower end of the outer drill pipe 1; or, the connecting part is provided with an internal thread, the connecting part is sleeved on the lower end of the outer drill pipe 1 and threadedly connected to the lower end of the outer drill pipe 1.

[0082] Preferably, the inner wall of the outer drill bit 11 is stepped.

[0083] Preferably, the sampling tube 3 is made of PVC (polyvinyl chloride).

[0084] Furthermore, the lower part of the sampling tube 3 can extend into the outer drill bit 11, and the lower end of the sampling tube 3 and the stepped surface 111 of the inner wall of the outer drill bit 11 are fitted with a clearance to prevent the outer drill bit 11 from transmitting the impact vibration during drilling to the sampling tube 3 when the sampling tube 3 contacts the outer drill bit 11, thus preventing damage to the sampling tube 3.

[0085] Specifically, a one-way soil inlet 31 is provided in the lower cavity of the sampling tube 3. The one-way soil inlet 31 allows soil to enter the sampling tube 3 from the lower opening of the outer drill pipe 1 in one direction and can also seal the lower opening of the sampling tube 3. After the sampling tube 3 has finished sampling and has been lifted out of the outer drill pipe 1, the one-way soil inlet 31 can seal the lower opening of the sampling tube 3 to prevent the soil in the sampling tube 3 from being discharged when the sampling tube 3 is removed.

[0086] More specifically, the one-way soil-entry component 31 includes a full-claw retaining spring.

[0087] The full-claw retaining spring includes a connecting ring 311 coaxially arranged with and located inside the sampling tube 3, and a plurality of arc-shaped strips 312 circumferentially spaced at the ends of the connecting ring 311 and extending toward the inner cavity of the sampling tube 3. The plurality of arc-shaped strips 312 can be opened by soil compression to allow soil to enter the sampling tube 3 unidirectionally through the lower opening of the outer drill pipe 1. Furthermore, the plurality of arc-shaped strips 312 can be retracted to close the lower opening of the sampling tube 3.

[0088] More specifically, the interference fit between the connecting ring 311 of the one-way soil inlet component 31 and the inner wall of the sampling tube 3 facilitates maintenance and disassembly.

[0089] Furthermore, the vibratory direct-push sampling drill bit also includes a connecting assembly 5, which is used to connect the sampling tube 3 and the retrieval and lifting mechanism 4, or, the connecting assembly 5 is used to connect the inner drill pipe 2 and the retrieval and lifting mechanism 4. The connecting assembly 5 includes a sampling tube connector 51. The lower end of the sampling tube connector 51 is detachably connected to the upper end of the sampling tube 3.

[0090] Specifically, the lower end of the sampling tube connector 51 is provided with an external thread, and the upper end of the sampling tube 3 is provided with an internal thread. The lower end of the sampling tube connector 51 is inserted into and threadedly connected to the upper end of the sampling tube 3; or, the lower end of the sampling tube connector 51 is provided with an internal thread, and the upper end of the sampling tube 3 is provided with an external thread. The lower end of the sampling tube connector 51 is sleeved on and threadedly connected to the upper end of the sampling tube 3.

[0091] Furthermore, the salvage and lifting mechanism 4 includes a spring clip bracket connector assembly 41, which can be hung on the top of the seat ring 12 located on the inner wall of the outer drill pipe 1.

[0092] The spring clip connector assembly 41 can be threaded to the upper part of the sampling tube connector 51. Tightening the spring clip connector assembly 41 can drive the sampling tube 3 to rise and fall through the sampling tube connector 51, so as to adjust the gap between the lower end of the sampling tube 3 and the stepped surface 111 of the inner wall of the outer drill bit 11; or, the spring clip connector assembly 41 can be threaded to the upper part of the inner drill rod 2. Tightening the spring clip connector assembly 41 can drive the inner drill rod 2 to rise and fall, so as to adjust the length of the cone end of the plug cone 22 of the inner drill rod 2 extending out of the lower opening of the outer drill tube 1.

[0093] Specifically, the upper part of the sampling tube connector 51 is provided with an external thread, and the lower part of the spring clip connector assembly 41 is provided with an internal thread. The spring clip connector assembly 41 can be sleeved and threadedly connected to the upper part of the sampling tube connector 51; or, the upper part of the sampling tube connector 51 is provided with an internal thread, and the lower part of the spring clip connector assembly 41 is provided with an external thread. The spring clip connector assembly 41 can be inserted into and threadedly connected to the upper part of the sampling tube connector 51. The upper part of the inner drill rod 2 is provided with an external thread, and the spring clip connector assembly 41 can be sleeved and threadedly connected to the upper part of the inner drill rod 2; or, the upper part of the inner drill rod 2 is provided with an internal thread, and the lower part of the spring clip connector assembly 41 is provided with an external thread. The spring clip connector assembly 41 can be inserted into and threadedly connected to the upper part of the inner drill rod 2.

[0094] Preferably, for ease of processing and loading / unloading, external threads are provided on the upper part of the sampling tube connector 51 and the upper part of the inner drill rod 2, and the outer diameters of the upper part of the sampling tube connector 51 and the upper part of the inner drill rod 2 are kept consistent, and an internal thread is correspondingly provided on the lower part of the spring clip connector assembly 41; or, internal threads are provided on the upper part of the sampling tube connector 51 and the upper part of the inner drill rod 2, and the inner diameters of the upper part of the sampling tube connector 51 and the upper part of the inner drill rod 2 are kept consistent, and an external thread is correspondingly provided on the lower part of the spring clip connector assembly 41, so that the spring clip connector assembly 41 can simultaneously adapt to connect the sampling tube connector 51 and the inner drill rod 2.

[0095] Furthermore, the connecting assembly 5 also includes a nut 52 that is sleeved and threaded onto the upper part of the sampling tube connector 51 or the upper part of the inner drill rod 2. The nut 52 is located below the spring clip bracket connector assembly 41 and is used to prevent the spring clip bracket connector assembly 41 from reversing and loosening when connected to the sampling tube connector 51 or the inner drill rod 2.

[0096] Specifically, the connecting assembly 5 also includes a spring washer 53 sleeved on the upper part of the sampling tube connector 51 or the upper part of the inner drill rod 2. The spring washer 53 is located between the nut 52 and the spring clip connector assembly 41, and the spring washer 53 is used to prevent the nut 52 and the spring clip connector assembly 41 from loosening.

[0097] Furthermore, the spring clip holder assembly 41 includes a spring clip holder connector 411 and a spring clip holder 412. The spring clip holder connector 411 is sleeved and threaded onto the sampling tube connector 51 or the inner drill rod 2.

[0098] The lower part of the spring clip holder 412 is detachably connected to the upper part of the spring clip holder connector 411. A suspension ring 413 is sandwiched between the lower peripheral wall of the spring clip holder 412 and the upper peripheral wall of the spring clip holder connector 411. The suspension ring 413 can be hung on the top of the seat ring 12 on the inner wall of the outer drill pipe 1 to restrict the downward movement of the retrieval and lifting mechanism 4.

[0099] The spring clip holder 412 is a hollow cylindrical body. From top to bottom, spring clip limiting blocks 414 and spring clip clamps 415 are sequentially arranged within the spring clip holder 412. The spring clip limiting block 414 includes two limiting blocks 4141, which are inserted into the first elongated hole 4121 extending axially on the peripheral wall of the spring clip holder 412 via pins. The spring clip clamp 415 includes two clamp bodies, which are inserted into through holes on the peripheral wall of the spring clip holder 412 via pins. The free ends of the two limiting blocks 4141 are hinged to the free ends of the two clamp bodies, forming a four-bar linkage.

[0100] The upper end of the spring 47, which is sleeved on the outer periphery of the spring clip holder 412, abuts against the spring baffle 416 at the top of the spring clip holder 412. The lower end of the spring 47 abuts against the free ends of the two limiting blocks 4141 to drive the free ends of the two limiting blocks 4141 to open, so that the free ends of the two clamps can extend out of the second elongated hole located on the peripheral wall of the spring clip holder 412 along its axial direction and extend into the annular spring clip chamber 13 opened on the inner peripheral wall of the outer drill pipe 1. When the spring clip 415 is located in the spring clip chamber 13, the spring clip chamber 13 can restrict the upward movement of the spring clip 415, thereby restricting the upward movement of the retrieval and lifting mechanism 4, and preventing the inner drill rod 2 from pressing upward on the retrieval and lifting mechanism 4 during drilling, causing the retrieval and lifting mechanism 4 to shift and detach from the outer drill pipe 1.

[0101] Thus, the downward movement of the salvage and lifting mechanism 4 is restricted by the suspension ring 413, and the upward movement of the salvage and lifting mechanism 4 is restricted by the top wall of the spring clip chamber 13, so as to achieve the upper and lower limits of the salvage and lifting mechanism 4 in the axial direction.

[0102] Specifically, the spring baffle 416 is detachably connected to the top of the spring clip holder 412 by bolts.

[0103] Furthermore, the salvage and lifting mechanism 4 also includes a recovery pipe 417.

[0104] The recovery tube 417 is sleeved outside the spring clip holder 412. The peripheral wall of the recovery tube 417 extends axially and has an elongated hole 4171 for the free ends of the limiting block 4141 and the spring clip 415 to extend out. The pins inserted on the two limiting blocks 4141 are also inserted into the first through hole in the middle of the peripheral wall of the recovery tube 417.

[0105] Furthermore, the salvage and lifting mechanism 4 also includes a spearhead base 42 and a spearhead 43.

[0106] The spearhead holder 42 is connected to the upper part of the recovery pipe 417. The lower part of the spearhead 43 extends into and connects to the top groove 421 of the spearhead holder 42. A positioning pin 44 is provided in the top groove 421, and the top of the positioning pin 44 abuts against the bottom plane of the spearhead 43, so that the spearhead 43 can move vertically when the lifting mechanism 4 is lifted, preventing the spearhead 43 from rotating left and right, thereby improving the success rate of lifting the lifting mechanism 4.

[0107] Specifically, a positioning spring 45 is fitted around the outer periphery of the positioning pin 44. The top end of the positioning spring 45 abuts against the bottom end of the pin head of the positioning pin 44, and the bottom end of the positioning spring 45 abuts against the bottom wall of the top groove 421. The positioning pin 44 is in a pre-tightened state, which can apply an upward pre-tightening force to the positioning pin 44 so that the top end of the positioning pin 44 abuts against the bottom plane of the spearhead 43.

[0108] Specifically, the lower part of the spearhead 43 extends into the top groove 421 of the spearhead holder 42 and is connected by a pin.

[0109] Specifically, the lower peripheral wall of the spearhead holder 42 has an elongated hole 422 extending axially, and the upper peripheral wall of the recovery tube 417 has a second through hole. After the lower part of the spearhead holder 42 is inserted into the upper part of the recovery tube 417, the elongated hole 422 of the spearhead holder and the second through hole on the recovery tube 417 are aligned, and a spearhead holder pin 423 is inserted to connect the spearhead holder 42 to the upper part of the recovery tube 417.

[0110] When the spearhead 43 is lifted upward, the spearhead 43 drives the spearhead seat 42 to move upward. After the spearhead seat pin 423 abuts against the elongated hole 422, the spearhead seat 42 drives the recovery tube 417 to move upward simultaneously.

[0111] Furthermore, the outer drill pipe 1 comprises, from top to bottom, a spring-loaded stop head 14, a spring-loaded chamber 15, and an outer drill string 16, all of which are annular and connected by threads. The lower end of the spring-loaded stop head 14 and the inner peripheral wall of the spring-loaded chamber 15 form an annular spring-loaded chamber 13. The lower end of the spring-loaded chamber 15 and the inner peripheral wall of the outer drill string 16 form an annular seat ring cavity 17 for accommodating the seat ring 12.

[0112] Specifically, the principle by which the salvage and lifting mechanism 4 drives the inner drill rod 2 or the sampling tube 3 to detach from the outer drill tube 1 is as follows:

[0113] First, the rope on the hoisting and lowering rope retrieval device of the drilling rig is wound and fixed to the retrieval spearhead 43. Then, the hoisting and lowering rope retrieval device pulls the rope upward, and the rope lifts the retrieval spearhead 43. The retrieval spearhead 43 drives the retrieval spearhead seat 42 to move upward. After the retrieval spearhead seat pin 423 abuts against the elongated hole 422 of the retrieval spearhead seat, the retrieval spearhead seat 42 drives the recovery pipe 417 to move upward simultaneously. At the same time as the recovery pipe 417 moves upward, it drives the two limiting blocks 4141, which are inserted into the first through hole on the peripheral wall of the recovery pipe 417 through the pin, to move upward. The free ends of the two limiting blocks 4141 retract inward under the gravity of the two clamps, and the free ends of the two clamps rotate and disengage from the spring clamp chamber 13. Then, the spring clamp clamp 415 drives the spring clamp frame 412, the spring clamp frame connector 411, and the inner drill rod 2 or sampling tube 3 connected to the spring clamp frame connector 411 to move upward simultaneously to disengage from the outer drill pipe 1. Therefore, the hoisting device of the drilling rig lowers the rope to lift the retrieval mechanism 4, so as to conveniently and quickly detach the inner drill rod 2 or the sampling tube 3 from the outer drill pipe 1. Compared with the method of continuously lifting and unscrewing multiple sampling tubes 3, the sampling efficiency is greatly improved, and the sampling tube 3 or the inner drill rod 2 can be conveniently and quickly put back into the outer drill pipe 1.

[0114] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0115] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0116] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A vibrating direct push sampling drill, comprising an outer drill pipe (1), characterized in that, further comprising an inner drill rod (2) and a sampling pipe (3) which are selectively placed in the outer drill pipe (1); when the inner drill rod (2) is placed in the outer drill pipe (1), the inner drill rod (2) can close the lower opening of the outer drill pipe (1), and the outer drill pipe (1) and the inner drill rod (2) can be simultaneously drilled into the ground to the sampling depth; when the sampling pipe (3) is placed in the outer drill pipe (1), the sampling pipe (3) can communicate with the lower opening of the outer drill pipe (1) to form a soil inlet channel, and when the outer drill pipe (1) is drilled, soil can enter the sampling pipe (3) from the lower opening of the outer drill pipe (1); further comprising a fishing and lifting mechanism (4) which can be placed in the outer drill pipe (1) and can be detached, and which is connected to the inner drill rod (2) or the sampling pipe (3) placed in the outer drill pipe (1), and is used to lift the inner drill rod (2) or the sampling pipe (3) to separate from the outer drill pipe (1); the inner drill rod (2) comprises a rod body (21), and a plug core cone (22) is arranged at the lower end of the rod body (21), and the tapered end of the plug core cone (22) can protrude out of the lower opening of the outer drill pipe (1); further comprising a connecting assembly (5), which comprises: a sampling pipe connector (51), the lower end of which is detachably connected to the upper end of the sampling pipe (3); the fishing and lifting mechanism (4) comprises a snap frame connector assembly (41), which can be hung on the top of a seat ring (12) located on the inner wall of the outer drill pipe (1); the snap frame connector assembly (41) can be threadedly connected to the upper part of the sampling pipe connector (51), and rotating the snap frame connector assembly (41) can drive the sampling pipe (3) to rise and fall through the sampling pipe connector (51); or, the snap frame connector assembly (41) can be threadedly connected to the upper part of the inner drill rod (2), and rotating the snap frame connector assembly (41) can drive the inner drill rod (2) to rise and fall.

2. The vibratory drag bit of claim 1, wherein, a sealing element (23) is sleeved on the circumferential wall of the plug core cone (22), and the sealing element (23) is used to seal the gap between the circumferential wall of the plug core cone (22) and the inner wall of the lower opening of the outer drill pipe (1).

3. The vibratory drag bit of claim 1, wherein, a tubular outer drill bit (11) is arranged at the lower end of the outer drill pipe (1), and the inner wall of the outer drill bit (11) is stepped; the lower part of the sampling pipe (3) can protrude into the outer drill bit (11), and the lower end of the sampling pipe (3) is in clearance fit with the stepped surface (111) of the inner wall of the outer drill bit (11); a one-way soil inlet element (31) is arranged in the cavity of the lower end of the sampling pipe (3), which can allow soil to enter the sampling pipe (3) from the lower opening of the outer drill pipe (1) in one direction, and can close the lower opening of the sampling pipe (3).

4. The vibratory drag bit sampling tool of claim 3, wherein, the one-way soil inlet element (31) comprises a full-claw blocking spring; The full-claw blocking spring comprises a connecting ring (311) coaxially arranged in the sampling tube (3) and located in the sampling tube (3), and a plurality of arc-shaped strips (312) arranged at the end of the connecting ring (311) in a circumferential direction and extending towards the inner cavity of the sampling tube (3); The plurality of arc-shaped strips (312) can be expanded by soil extrusion to allow soil to enter the sampling tube (3) from the lower opening of the outer drill pipe (1) in one direction; and The plurality of arc-shaped strips (312) can be folded to close the lower opening of the sampling tube (3).

5. The vibratory drag bit sampling tool of claim 1, wherein, The connecting assembly (5) further comprises a nut (52) sleeved and threadedly connected to the upper part of the sampling tube connector (51) or the upper part of the inner drill rod (2), and the nut (52) is located below the spring clamp connector assembly (41); The connecting assembly (5) further comprises a spring washer (53) sleeved on the upper part of the sampling tube connector (51) or the upper part of the inner drill rod (2), and the spring washer (53) is located between the nut (52) and the spring clamp connector assembly (41).

6. The vibratory drag bit of claim 5, wherein, The spring clamp connector assembly (41) comprises a spring clamp connector (411) and a spring clamp (412), and the spring clamp connector (411) is sleeved and threadedly connected to the sampling tube connector (51) or the inner drill rod (2); The lower part of the spring clamp (412) is detachably connected to the upper part of the spring clamp connector (411), a hanging ring (413) is clamped between the lower part of the spring clamp (412) and the upper part of the spring clamp connector (411), and the hanging ring (413) can be hung on the top of the seat ring (12); The spring clamp (412) is a hollow column, and a spring clamp limiting block (414) and a spring clamp clamp (415) are sequentially arranged in the spring clamp (412) from top to bottom; the spring clamp limiting block (414) comprises two limiting blocks (4141), and the two limiting blocks (4141) are inserted into a first long-shaped hole (4121) extending in an axial direction on the peripheral wall of the spring clamp (412) through a latch; the spring clamp clamp (415) comprises two clamp bodies, and the two clamp bodies are inserted into through holes on the peripheral wall of the spring clamp (412) through a latch; the free ends of the two limiting blocks (4141) are hingedly connected to the free ends of the two clamp bodies one by one; The upper end of a spring (47) sleeved on the outer periphery of the spring clamp (412) abuts against a spring baffle (416) connected to the top of the spring clamp (412), and the lower end of the spring (47) abuts against the free ends of the two limiting blocks (4141) to drive the free ends of the two limiting blocks (4141) to expand, so that the free ends of the two clamp bodies can extend out of a second long-shaped hole extending in an axial direction on the peripheral wall of the spring clamp (412) and into a spring clamp chamber (13) formed in the annular peripheral wall of the outer drill pipe (1).

7. The vibratory drag bit sampling tool of claim 6, wherein, The fishing and lifting mechanism (4) further comprises: A recovery pipe (417) is sleeved outside the elastic clamping frame (412), and a circumferential wall of the recovery pipe (417) extends in the axial direction and is provided with a recovery pipe elongated hole (4171) for the free end of the limiting block (4141) and the free end of the elastic clamping jaw (415) to extend out; the latch inserted into the two limiting blocks (4141) is also inserted into a first through hole in the middle of the circumferential wall of the recovery pipe (417); and a lance head seat (42) connected to the upper part of the recovery pipe (417) and a lance head (43) extending into and connected to a top recess (421) of the lance head seat (42), the top recess (421) is provided with a positioning stop pin (44), the outer circumference of the positioning stop pin (44) is sleeved with a positioning spring (45), the top end of the positioning spring (45) abuts against the bottom end of the pin head of the positioning stop pin (44), the bottom end of the positioning spring (45) abuts against the bottom wall of the top recess (421), and the positioning spring (45) drives the top end of the positioning stop pin (44) to abut against the bottom end plane of the lance head (43).

8. A sampling method of the vibrating direct-push sampling drill according to any one of claims 1-7, characterized in that, when continuous sampling from the ground to the underground is needed, the method comprises the following steps: A1: connecting the fishing lifting mechanism (4) to the upper part of the sampling pipe (3), and placing the fishing lifting mechanism (4) and the sampling pipe (3) in the outer drill pipe (1); A2: when the outer drill pipe (1) is drilled, soil enters the sampling pipe (3) from the lower opening of the outer drill pipe (1), and when the drilling depth reaches the length of the sampling pipe (3), the sampling pipe (3) is lifted by the fishing lifting mechanism (4) to separate from the outer drill pipe (1), then the sampling pipe (3) is detached from the fishing lifting mechanism (4) to obtain the soil sample in the sampling pipe (3); A3: according to the sampling depth of the soil, drilling one outer drill pipe (1) into the underground; or connecting one or more outer drill pipes (1) to the top of the outer drill pipe (1) located in the underground; Meanwhile, according to the sampling depth of the soil, performing step A1 and step A2 once or repeatedly to obtain the soil sample of the sampling depth; when drilling into the underground and then sampling is needed, the method comprises the following steps: B1: connecting the fishing lifting mechanism (4) to the upper part of the inner drill pipe (2), and placing the fishing lifting mechanism (4) and the inner drill pipe (2) in the outer drill pipe (1), and the inner drill pipe (2) closes the lower opening of the outer drill pipe (1); B2: the outer drill pipe (1) and the inner drill pipe (2) are drilled synchronously to the sampling depth, the inner drill pipe (2) is lifted by the fishing lifting mechanism (4) to separate from the outer drill pipe (1), and then the inner drill pipe (2) is detached from the fishing lifting mechanism (4); B3: connecting the fishing lifting mechanism (4) to the upper part of the sampling pipe (3), and placing the fishing lifting mechanism (4) and the sampling pipe (3) in the outer drill pipe (1); B4: when the outer drill pipe (1) is drilling, the soil enters the sampling pipe (3) through the lower opening of the outer drill pipe (1), and when the drilling reaches the length of the sampling pipe (3), the sampling pipe (3) is lifted by the fishing lifting mechanism (4) to separate from the outer drill pipe (1), then the sampling pipe (3) is detached from the fishing lifting mechanism (4) to obtain the soil sample in the sampling pipe (3); B5: according to the sampling depth of the soil, steps B3 and B4 are performed once or repeatedly to continuously obtain the soil sample at the sampling depth; B6: repeat steps B1-B5 to alternately drill and sample underground.

Images