CN113090260A - Negative pressure integrated drill bit suitable for underground volatile gas collection - Google Patents
Negative pressure integrated drill bit suitable for underground volatile gas collection Download PDFInfo
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- CN113090260A CN113090260A CN202110392770.5A CN202110392770A CN113090260A CN 113090260 A CN113090260 A CN 113090260A CN 202110392770 A CN202110392770 A CN 202110392770A CN 113090260 A CN113090260 A CN 113090260A
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- negative pressure
- drill bit
- main body
- air inlet
- volatile gas
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/081—Obtaining fluid samples or testing fluids, in boreholes or wells with down-hole means for trapping a fluid sample
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1418—Depression, aspiration
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- Environmental & Geological Engineering (AREA)
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Abstract
A negative pressure integrated drill bit suitable for collecting underground volatile gas comprises a drill bit main body, wherein the upper end of the drill bit main body is connected with a cover plate, and more than one deep hole structure for placing a sleeve and a ferromagnetic plunger piston is arranged in the drill bit main body; more than one volatile gas inlet channels on the side surface of the drill bit main body are provided with semipermeable membranes; an electromagnet, a large spring, a piston and a one-way valve are sequentially arranged in a negative pressure cavity in the drill bit main body from top to bottom, and the electromagnet is connected with a cover plate; an air inlet valve is arranged in an air inlet channel in the drill bit main body, and a negative pressure system is formed by a sleeve, a ferromagnetic plunger, an electromagnet, a large spring, a piston, a one-way valve and the air inlet valve; the invention enables the interior of the drill bit to form negative pressure, increases the pressure difference between the interior and the exterior of the drill bit, is beneficial to volatile gas to enter the interior of the drill bit, and has the advantages of high integration degree, convenient control, high gas collection rate and the like.
Description
Technical Field
The invention relates to the technical field of underground drilling, in particular to a negative pressure integrated drill bit suitable for underground volatile gas collection.
Background
The existing drilling device for collecting underground volatile gas is mostly composed of a detector probe, a semipermeable membrane, a heater, a conductivity sensor and nitrogen circulating equipment, when the volatile gas is collected, pressure difference is formed between the inside of a probe and the external environment by means of carrier gas (nitrogen) with high flow velocity to collect the volatile gas, and the collection method often cannot collect underground volatile gas in a large quantity because the pressure difference between the inside and the outside of the probe is small, so that the content of the volatile gas in the carrier gas is low, and the detection sensitivity is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the negative pressure integrated drill bit suitable for collecting underground volatile gas, and the negative pressure integrated drill bit has the advantages of high integration degree, convenience in control, high gas collection rate and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a negative pressure integrated drill bit suitable for collecting underground volatile gas comprises a drill bit main body 3, wherein the upper end of the drill bit main body 3 is connected with a cover plate 1, and more than one deep hole structures 3b for placing a sleeve 4 and a ferromagnetic plunger 5 are arranged in the drill bit main body 3; more than one volatile gas inlet 3c on the side surface of the drill bit main body 3 is provided with a semipermeable membrane 9; an electromagnet 10, a large spring 6, a piston 7 and a one-way valve 8 are sequentially arranged in a negative pressure cavity 3e in the drill bit main body 3 from top to bottom, and the electromagnet 10 is connected with the cover plate 1; an air inlet valve 11 is installed in an air inlet channel 3f in the drill bit main body 3, and a negative pressure system is formed by the sleeve 4, the ferromagnetic plunger 5, the electromagnet 10, the large spring 6, the piston 7, the one-way valve 8 and the air inlet valve 11.
The drill bit body 3 is a whole piece and is manufactured by using a non-ferromagnetic material through an additive manufacturing technology; the upper end of the drill bit main body 3 is connected with a feeding system; a grid structure 3a, a deep hole structure 3b, more than one volatile gas inlet channel 3c, an outlet channel 3d, a negative pressure cavity 3e and an inlet channel 3f are designed in the drill bit main body 3; wherein the grid structure 3a is used for arranging sensors; the deep hole structures 3b are equal in number and communicated with the volatile gas inlet channels 3c, the deep hole structures 3b are communicated with the negative pressure cavity 3e through two through holes, and the two through holes are not at the same height; the air outlet channel 3d is L-shaped and is communicated with the negative pressure cavity 3e from the lower part, and the upper end of the air outlet channel 3d extends out of the drill bit main body 3; the air inlet 3f is in a reverse h shape, and the upper end of the air inlet 3f extends out of the drill bit main body 3 and is communicated with the negative pressure cavity 3 e.
The cover plate 1 is provided with round holes with the same diameter and position as the extending parts of the air outlet channel 3d and the air inlet channel 3f of the drill bit main body 3, so that the cover plate 1 is sleeved on the drill bit main body 3.
One half of the sleeve 4 is of a solid structure, the other half of the sleeve is of a hollow structure, and a first through hole 4c and a second through hole 4d which correspond to the volatile air inlet channel 3c and the negative pressure cavity 3e are formed in the hollow structure; a circular truncated cone structure 4b is arranged between the first through hole 4c and the second through hole 4d, and the ferromagnetic plunger 5 controls the connection and disconnection between the first through hole 4c and the second through hole 4d through the circular truncated cone structure 4b, so that the connection and disconnection between the volatile gas inlet channel 3c and the negative pressure cavity 3e are controlled; in order to ensure the correct matching between the volatile gas inlet channel 3c and the negative pressure cavity 3e and the first through hole 4c and the second through hole 4d, the top end of the solid structure of the sleeve 4 is provided with a special-shaped positioning groove 4a, and the special-shaped positioning groove 4a is matched and connected with a special-shaped positioning block 1a on the cover plate 1.
The piston 7 consists of an upper rubber sealing ring 7-1, a lower rubber sealing ring 7-3 and an annular magnet 7-2, wherein the annular magnet 7-2 is arranged between the upper rubber sealing ring 7-1 and the lower rubber sealing ring 7-3, an upper cavity of a negative pressure cavity 3e is arranged above the upper rubber sealing ring 7-1, a lower cavity of the negative pressure cavity 3e is arranged below the lower rubber sealing ring 7-3, and the annular magnet 7-2 is attracted by the electromagnet 10 to drive the whole piston 7 to move up and down; the annular magnet 7-2 also drives the ferromagnetic plunger 5 to move up and down, so that the on-off between the volatile gas inlet channel 3c and the negative pressure cavity 3e is controlled; more than one through hole is formed in each of the upper rubber sealing ring 7-1 and the lower rubber sealing ring 7-3, a one-way valve 8 is installed at the lower end of the through hole formed in the lower rubber sealing ring 7-3, and the one-way valve 8 only enables gas in the negative pressure cavity 3e to enter the lower cavity from the upper cavity.
The check valve 8 consists of a check valve spring 8-1 and a check valve body 8-2, and two ends of the check valve spring 8-1 are respectively connected with the lower rubber sealing ring 7-3 and the check valve body 8-2.
The air inlet valve 11 consists of an air inlet valve spring 11-1, two sealing rubber rings 11-2 and a small magnet 11-3, wherein the small magnet 11-3 is clamped between the two sealing rubber rings 11-2; when the electromagnet 10 is electrified, the air inlet valve 11 is driven by the electromagnetic force of the small magnet 11-3 to move downwards, so that the negative pressure cavity 3e is communicated with the air inlet channel 3 f; when the electromagnet 10 is powered off, the air inlet valve 11 moves upwards under the driving of the air inlet valve spring 11-1, and the communication between the negative pressure cavity 3e and the air inlet channel 3f is blocked.
The invention has the beneficial effects that:
(1) according to the invention, the negative pressure system and the gas circuit are integrated in the drill bit main body 3, so that the drill bit has the advantages of high integration degree and the like.
(2) The invention adopts the electromagnet 10 as a power source for generating negative pressure, and the piston 7, the ferromagnetic plunger 5 and the air inlet valve 11 all move up and down under the driving of electromagnetic force, thereby having the advantages of convenient control, sensitivity and the like.
(3) When volatile gas is collected, the invention can generate negative pressure inside the drill bit, so that the pressure difference inside and outside the drill bit is increased, underground volatile gas can enter the drill bit conveniently, and the volatile gas is sent into the detector through the gas outlet channel, thereby improving the detection sensitivity and having the advantages of high integration degree, high gas collection rate and the like.
Drawings
FIG. 1 is a top view of the present invention.
FIG. 2 is a sectional view taken along line A-A of the present invention.
FIG. 3 is a cross-sectional view taken in the direction of rotation B-B of the present invention.
Fig. 4 is a schematic structural view of the sleeve 4 of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1, 2 and 3, a negative pressure integrated drill bit suitable for collecting underground volatile gas comprises a drill bit body 3, wherein a negative pressure system for collecting volatile gas is integrated in the drill bit body 3, and the upper end of the drill bit body 3 is provided with internal threads for connecting a feeding system, so that the drill bit integrated with the negative pressure system can smoothly reach an underground designated position; a grid structure 3a is arranged in the drill bit main body 3 and can be used for arranging structures such as sensors; the upper end of the drill bit main body 3 is connected with a cover plate 1, the cover plate 1 is provided with round holes with the same diameter and position as the extending parts of the air outlet channel 3d and the air inlet channel 3f of the drill bit main body 3, and the cover plate 1 is sleeved on the drill bit main body 3; more than one volatile gas inlet channels 3c on the side surface of the drill bit main body 3 are provided with semipermeable membranes 9 for preventing gases except volatile gas from entering the negative pressure cavity 3 e;
referring to fig. 2 and 3, the drill bit body 3 is a unitary piece and is integrally machined by an additive manufacturing technique; more than one deep hole structure 3b, more than one volatile gas inlet channel 3c, gas outlet channel 3d, negative pressure cavity 3e and gas inlet channel 3f are designed in the drill bit main body 3; the deep hole structures 3b are communicated with the volatile gas inlet channels 3c in equal quantity, the deep hole structures 3b are communicated with the negative pressure cavity 3e through two through holes, and the two through holes are not at the same height; the air outlet channel 3d is L-shaped and is communicated with the negative pressure cavity 3e from the lower part, and the upper end of the air outlet channel 3d extends out of the drill bit main body 3; the air inlet 3f is in a reverse h shape, and the upper end of the air inlet 3f extends out of the drill bit main body 3 and is communicated with the negative pressure cavity 3 e.
Referring to fig. 2 and 3, a negative pressure system for collecting volatile gas is integrated inside the drill bit body 3, and the action components of the negative pressure system are composed of a sleeve 4 and a ferromagnetic plunger 5 which are placed in a deep hole structure 3b, an electromagnet 10, a large spring 6, a piston 7 and a check valve 8 which are sequentially installed in a negative pressure cavity 3e from top to bottom, and an air inlet valve 11 in an air inlet channel 3 f; the electromagnet 10 is connected with the cover plate 1 through a screw 2.
Referring to fig. 2, the piston 7 is composed of an upper rubber sealing ring 7-1, a lower rubber sealing ring 7-3 and an annular magnet 7-2, wherein the annular magnet 7-2 is installed between the upper rubber sealing ring 7-1 and the lower rubber sealing ring 7-3, an upper cavity of a negative pressure cavity 3e is arranged above the upper rubber sealing ring 7-1, a lower cavity of the negative pressure cavity 3e is arranged below the lower rubber sealing ring 7-3, and the annular magnet 7-2 can be attracted by an electromagnet 10 to drive the whole piston 7 to move up and down, so that the volume of the upper cavity and the lower cavity of the negative pressure cavity 3e is changed; the annular magnet 7-2 can also drive the ferromagnetic plunger 5 to move up and down, so that the on-off between the volatile gas inlet channel 3c and the negative pressure cavity 3e is controlled; more than one through hole is formed in each of the upper rubber sealing ring 7-1 and the lower rubber sealing ring 7-3, and a one-way valve 8 is arranged at the lower end of the through hole formed in the lower rubber sealing ring 7-3; the one-way valve 8 consists of a one-way valve spring 8-1 and a one-way valve body 8-2, and two ends of the one-way valve spring 8-1 are respectively connected with the lower rubber sealing ring 7-3 and the one-way valve body 8-2, so that the one-way valve 8 can only enable gas in the negative pressure cavity 3e to enter the lower cavity from the upper cavity.
Referring to fig. 3, the air intake valve 11 is composed of an air intake valve spring 11-1, two sealing rubber rings 11-2 and a small magnet 11-3, wherein the small magnet 11-3 is sandwiched between the two sealing rubber rings 11-2; through the arrangement of magnetic poles, when the electromagnet 10 is electrified, the air inlet valve 11 is driven by the electromagnetic force of the small magnet 11-3 to move downwards, so that the negative pressure cavity 3e is communicated with the air inlet 3 f; when the electromagnet 10 is powered off, the air inlet valve 11 moves upwards under the driving of the air inlet valve spring 11-1, and the communication between the negative pressure cavity 3e and the air inlet channel 3f is blocked.
Referring to fig. 2 and 4, half of the sleeve 4 is a solid structure, and half is a hollow structure, and a first through hole 4c and a second through hole 4d corresponding to the volatile air inlet 3c and the negative pressure cavity 3e are formed in the hollow structure; a circular truncated cone structure 4b is arranged between the first through hole 4c and the second through hole 4d, and the ferromagnetic plunger 5 controls the connection and disconnection between the first through hole 4c and the second through hole 4d through the circular truncated cone structure 4b, so that the connection and disconnection between the volatile gas inlet channel 3c and the negative pressure cavity 3e are controlled; in order to ensure the correct matching of the volatile gas inlet channel 3c and the negative pressure cavity 3e with the first through hole 4c and the second through hole 4d, the top end of the solid structure of the sleeve 4 is provided with a special-shaped positioning groove 4a, and the special-shaped positioning groove 4a is matched and connected with a special-shaped positioning block 1a on the cover plate 1 so as to ensure the correct installation position; when the integral installation is carried out, the ferromagnetic plunger 5 is firstly inserted into the sleeve 4, then the sleeve 4 is integrally inserted into the deep hole structure 3b, and finally the sleeve 4 is positioned through the special-shaped positioning block 1a and the special-shaped positioning groove 4 a.
The working principle of the invention is as follows:
when the integrated drill bit of the invention goes deep into an underground target position and starts working, the electromagnet 10 is electrified, at the moment, the air inlet valve 11 moves downwards under the action of the electromagnetic force, and nitrogen enters the upper cavity of the negative pressure cavity 3 e; meanwhile, the piston 7 overcomes the spring force to move upwards under the action of electromagnetic force, and drives the ferromagnetic plunger 5 to move upwards to the round platform structure 4b, so that the communication between the volatile gas inlet 3c and the negative pressure cavity 3e is blocked; at the moment, the gas and the nitrogen in the upper cavity of the negative pressure cavity 3e can only enter the lower cavity of the negative pressure cavity 3e through the one-way valve 8 and are discharged through the gas outlet channel 3 d; when the electromagnet 10 is powered off, the air inlet valve 11 moves upwards under the action of the spring force to block the connection between the air inlet channel 3f and the negative pressure cavity 3e, the piston 7 moves downwards under the action of the large spring 6 and the self gravity to extrude the gas in the lower cavity of the negative pressure cavity 3e and drive the ferromagnetic plunger 5 to move downwards, at the moment, the volatile gas inlet channel 3c and the negative pressure cavity 3e are communicated, and negative pressure is formed in the upper cavity of the negative pressure cavity 3e due to the rapid change of the volume of the upper cavity of the negative pressure cavity 3e, so that the external volatile gas enters the upper cavity of the negative pressure cavity 3e under the pushing of the pressure difference. Through above process cycle operation, the volatile gas that collects in the intracavity can get into negative pressure chamber 3e cavity of resorption after electro-magnet 10 circular telegram in negative pressure chamber 3e to when electro-magnet 10 outage, send into detection device through gas outlet channel 3d, meanwhile, new volatile gas can be collected to negative pressure chamber 3e cavity of resorption, realize high-efficient, the periodic detection underground volatile gas.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides an integrated drill bit of negative pressure suitable for gaseous collection of underground volatility, includes drill bit main part (3), its characterized in that: the upper end of the drill bit main body (3) is connected with a cover plate (1), and more than one deep hole structure (3b) for placing a sleeve (4) and a ferromagnetic plunger (5) is arranged in the drill bit main body (3); more than one volatile gas inlet channel (3c) on the side surface of the drill bit main body (3) is provided with a semipermeable membrane (9); an electromagnet (10), a large spring (6), a piston (7) and a one-way valve (8) are sequentially arranged in a negative pressure cavity (3e) in the drill bit main body (3) from top to bottom, and the electromagnet (10) is connected with the cover plate (1); an air inlet valve (11) is installed in an air inlet channel (3f) in the drill bit main body (3), and a negative pressure system is formed by the sleeve (4), the ferromagnetic plunger (5), the electromagnet (10), the large spring (6), the piston (7), the one-way valve (8) and the air inlet valve (11).
2. The negative pressure integrated drill bit suitable for underground volatile gas collection according to claim 1, wherein: the drill bit main body (3) is an integral piece and is manufactured by using a non-ferromagnetic material through an additive manufacturing technology; the upper end of the drill bit main body (3) is provided with an internal thread for connecting a feeding system; a grid structure (3a), a deep hole structure (3b), more than one volatile gas inlet channel (3c), an outlet channel (3d), a negative pressure cavity (3e) and an inlet channel (3f) are designed in the drill bit main body (3); wherein the grid structure (3a) is used for arranging sensors; the deep hole structures (3b) are equal in number and communicated with the volatile gas inlet channels (3c), the deep hole structures (3b) are communicated with the negative pressure cavity (3e) through two through holes, and the two through holes are not at the same height; the air outlet channel (3d) is L-shaped and is communicated with the negative pressure cavity (3e) from the lower part, and the upper end of the air outlet channel (3d) extends out of the drill bit main body (3); the air inlet channel (3f) is of an inverted h shape, and the upper end of the air inlet channel (3f) extends out of the drill bit main body (3) and is communicated with the negative pressure cavity (3 e).
3. The negative pressure integrated drill bit suitable for underground volatile gas collection according to claim 1, wherein: the cover plate (1) is provided with round holes with the same diameter and position as those of the extending parts of the air outlet channel (3d) and the air inlet channel (3f) of the drill main body (3), so that the cover plate (1) is sleeved on the drill main body (3).
4. The negative pressure integrated drill bit suitable for underground volatile gas collection according to claim 1, wherein: one half of the sleeve (4) is of a solid structure, the other half of the sleeve is of a hollow structure, and a first through hole (4c) and a second through hole (4d) which correspond to the volatile air inlet channel (3c) and the negative pressure cavity (3e) are formed in the hollow structure; a circular truncated cone structure (4b) is arranged between the first through hole (4c) and the second through hole (4d), and the ferromagnetic plunger (5) controls the connection and disconnection between the first through hole (4c) and the second through hole (4d) through the circular truncated cone structure (4b), so that the connection and disconnection between the volatile gas inlet channel (3c) and the negative pressure cavity (3e) are controlled; in order to ensure the correct matching between the volatile gas inlet channel (3c) and the negative pressure cavity (3e) as well as the first through hole (4c) and the second through hole (4d), the top end of the solid structure of the sleeve (4) is provided with a special-shaped positioning groove (4a), and the special-shaped positioning groove (4a) is matched and connected with a special-shaped positioning block (1a) on the cover plate (1).
5. The negative pressure integrated drill bit suitable for underground volatile gas collection according to claim 1, wherein: the piston (7) consists of an upper rubber sealing ring (7-1), a lower rubber sealing ring (7-3) and an annular magnet (7-2), wherein the annular magnet (7-2) is arranged between the upper rubber sealing ring (7-1) and the lower rubber sealing ring (7-3), an upper cavity of a negative pressure cavity (3e) is arranged above the upper rubber sealing ring (7-1), a lower cavity of the negative pressure cavity (3e) is arranged below the lower rubber sealing ring (7-3), and the annular magnet (7-2) is attracted by an electromagnet (10) to drive the whole piston (7) to move up and down; the annular magnet (7-2) also drives the ferromagnetic plunger (5) to move up and down, so that the on-off between the volatile gas inlet channel (3c) and the negative pressure cavity (3e) is controlled; more than one through hole is formed in each of the upper rubber sealing ring (7-1) and the lower rubber sealing ring (7-3), a one-way valve (8) is installed at the lower end of the through hole formed in the lower rubber sealing ring (7-3), and the one-way valve (8) only enables gas in the negative pressure cavity (3e) to enter the lower cavity from the upper cavity.
6. The negative pressure integrated drill bit suitable for underground volatile gas collection according to claim 5, wherein: the one-way valve (8) consists of a one-way valve spring (8-1) and a one-way valve body (8-2), and two ends of the one-way valve spring (8-1) are respectively connected with the lower rubber sealing ring (7-3) and the one-way valve body (8-2).
7. The negative pressure integrated drill bit suitable for underground volatile gas collection according to claim 1, wherein: the air inlet valve (11) consists of an air inlet valve spring (11-1), two sealing rubber rings (11-2) and a small magnet (11-3), wherein the small magnet (11-3) is clamped between the two sealing rubber rings (11-2); when the electromagnet (10) is electrified, the air inlet valve (11) moves downwards under the driving of the electromagnetic force of the small magnet (11-3), so that the negative pressure cavity (3e) is communicated with the air inlet channel (3 f); when the electromagnet (10) is powered off, the air inlet valve (11) moves upwards under the driving of the air inlet valve spring (11-1), and the communication between the negative pressure cavity (3e) and the air inlet channel (3f) is blocked.
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| CN202110392770.5A CN113090260B (en) | 2021-04-13 | 2021-04-13 | Negative pressure integrated drill bit suitable for underground volatile gas collection |
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| CN202110392770.5A CN113090260B (en) | 2021-04-13 | 2021-04-13 | Negative pressure integrated drill bit suitable for underground volatile gas collection |
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| CN206862697U (en) * | 2017-05-13 | 2018-01-09 | 湖南省金顶实业有限公司 | Sealed electromagnetic formula sampler is used in a kind of soy sauce processing |
| CN108361320A (en) * | 2018-04-12 | 2018-08-03 | 吉林大学 | The two-way main shaft buffer device of binary channels built using nitrogen gas spring |
| CN108956217A (en) * | 2018-09-28 | 2018-12-07 | 四川省天晟源环保股份有限公司 | A kind of novel SOIL GAS collection and detection device |
| CN110644983A (en) * | 2018-11-08 | 2020-01-03 | 李文欣 | Water-locking type drilling sampling device for loose and broken stratum |
| CN212359741U (en) * | 2020-06-10 | 2021-01-15 | 郝书洁 | Portable groundwater sampling device |
| CN111896308A (en) * | 2020-08-14 | 2020-11-06 | 郝栋 | Sampling device and sampling method for oil field geological exploration |
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