CN113090260B - 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
- Publication number
- CN113090260B CN113090260B CN202110392770.5A CN202110392770A CN113090260B CN 113090260 B CN113090260 B CN 113090260B CN 202110392770 A CN202110392770 A CN 202110392770A CN 113090260 B CN113090260 B CN 113090260B
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- negative pressure
- drill bit
- air inlet
- volatile gas
- main body
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Classifications
-
- 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
-
- 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
-
- 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
Abstract
The 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 is arranged in the drill bit main body; the semi-permeable membrane is arranged on more than one volatile gas inlet channel on the side surface of the drill bit main body; an electromagnet, a large spring, a piston and a one-way valve are sequentially arranged in the negative pressure cavity in the drill bit main body from top to bottom, and the electromagnet is connected with the 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 can form negative pressure in the drill bit, increase the pressure difference between the inside and the outside of the drill bit, facilitate volatile gas to enter 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 mainly composed of a detector probe, a semipermeable membrane, a heater, a conductivity sensor and nitrogen circulating equipment, when the volatile gas is collected, the volatile gas is collected by forming pressure difference between the inside of a probe and the external environment by means of carrier gas (nitrogen) with high flow rate.
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 underground volatile gas collection, 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 above purpose, the present invention adopts the following technical scheme:
the utility model provides a negative pressure integrated drill bit suitable for underground volatile gas gathers, includes bit body 3, and bit body 3's upper end is connected with apron 1, and bit body 3 is inside to be used for placing casing 4 and ferromagnetic plunger 5's more than one deep hole structure 3b; the semipermeable membrane 9 is arranged on more than one volatile gas inlet channel 3c on the side surface of the drill bit main body 3; 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 arranged in an air inlet channel 3f in the drill bit main body 3, and a negative pressure system is formed by a sleeve 4, a ferromagnetic plunger 5, an electromagnet 10, a large spring 6, a piston 7, a one-way valve 8 and the air inlet valve 11.
The bit body 3 is a single piece and is manufactured by additive manufacturing technology by using nonferromagnetic materials; the upper end of the drill bit main body 3 is connected with a feeding system; the drill bit body 3 is internally provided with a grid structure 3a, a deep hole structure 3b, more than one volatile gas inlet channel 3c, an air outlet channel 3d, a negative pressure cavity 3e and an air inlet channel 3f; wherein the grid structure 3a is used for arranging a sensor; the deep hole structure 3b and the volatile gas inlet channels 3c are equal in number and are communicated, the deep hole structure 3b is 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 body 3 and is communicated with the negative pressure cavity 3 e.
The cover plate 1 is provided with round holes with the same diameters and positions as those of the extension 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.
Half of the sleeve 4 is of a solid structure, and the other half of the sleeve is of a hollow structure, and a first through hole 4c and a second through hole 4d corresponding 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 on-off of the first through hole 4c and the second through hole 4d through the circular truncated cone structure 4b, so as to control the on-off of the volatile gas inlet channel 3c and the negative pressure cavity 3 e; 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, a special-shaped positioning groove 4a is formed at the top end of the solid structure of the sleeve 4, 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 a ring magnet 7-2, wherein the ring magnet 7-2 is arranged between the upper rubber sealing ring 7-1 and the lower rubber sealing ring 7-3, the upper part of the upper rubber sealing ring 7-1 is an upper cavity of the negative pressure cavity 3e, the lower part of the lower rubber sealing ring 7-3 is a lower cavity of the negative pressure cavity 3e, and the ring 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 as to control the on-off between the volatile gas inlet channel 3c and the negative pressure cavity 3 e; 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 arranged at the lower end of the through hole formed in the lower rubber sealing ring 7-3, and the one-way valve 8 can only enable gas in the negative pressure cavity 3e to enter the lower cavity from the upper cavity.
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.
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 drive of the electromagnetic force of the small magnet 11-3, so that the negative pressure cavity 3e is communicated with the air inlet channel 3f; when the electromagnet 10 is powered off, the air inlet valve 11 moves upwards under the drive 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 beneficial effects of the invention are as follows:
(1) The invention integrates the negative pressure system and the air passage in the drill bit main body 3, and 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 are driven by electromagnetic force to move up and down, thereby having the advantages of convenient and sensitive control and the like.
(3) When volatile gas is collected, the invention can generate negative pressure in the drill bit, so that the pressure difference between the inside and the outside of the drill bit is increased, the underground volatile gas is facilitated to enter the drill bit, and then the volatile gas is sent into the detector through the gas outlet channel, so that the detection sensitivity is improved, and the invention has 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 cross-sectional view taken along line A-A of the present invention.
FIG. 3 is a B-B side view in rotational section of the present invention.
Fig. 4 is a schematic view of the structure of the sleeve 4 according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples.
Referring to fig. 1, 2 and 3, a negative pressure integrated drill bit suitable for collecting volatile gases underground comprises a drill bit main body 3, a negative pressure system for collecting the volatile gases is integrated in the drill bit main body 3, and an internal thread is processed at the upper end of the drill bit main body 3 and is used for being connected with a feeding system, so that the drill bit integrated with the negative pressure system can smoothly reach an underground designated position; the drill bit body 3 is internally provided with a grid structure 3a which can be used for arranging structures such as a sensor and the like; the upper end of the drill bit main body 3 is connected with a cover plate 1, and the cover plate 1 is provided with round holes with the same diameter and the same position as the extension 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; a semipermeable membrane 9 is arranged on more than one volatile gas inlet channel 3c on the side surface of the drill bit body 3 and is used for preventing gases except volatile gases from entering the negative pressure cavity 3 e;
referring to fig. 2 and 3, the bit body 3 is a single piece and is integrally manufactured by additive manufacturing technology; the drill bit body 3 is internally provided with more than one deep hole structure 3b, more than one volatile gas inlet channel 3c, a gas outlet channel 3d, a negative pressure cavity 3e and a gas inlet channel 3f; the deep hole structures 3b and the volatile gas inlet channels 3c are equal in number and are communicated, 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 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 gases is integrated inside the drill bit body 3, and the action parts of the negative pressure system consist of a sleeve 4 and a ferromagnetic plunger 5 placed in a deep hole structure 3b, an electromagnet 10, a large spring 6, a piston 7 and a one-way valve 8 which are installed in sequence from top to bottom in a negative pressure cavity 3e, and an air inlet valve 11 in an air inlet channel 3f; 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 a ring magnet 7-2, wherein the ring magnet 7-2 is installed between the upper rubber sealing ring 7-1 and the lower rubber sealing ring 7-3, the upper part of the upper rubber sealing ring 7-1 is an upper cavity of the negative pressure cavity 3e, the lower part of the lower rubber sealing ring 7-3 is a lower cavity of the negative pressure cavity 3e, and the ring magnet 7-2 can be attracted by the 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 as to control the on-off between the volatile gas inlet channel 3c and the negative pressure cavity 3 e; 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 intake valve 11 is composed of an 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 the magnetic poles, when the electromagnet 10 is electrified, the air inlet valve 11 moves downwards under the drive of the electromagnetic force of the small magnet 11-3, so that the negative pressure cavity 3e is communicated with the air inlet channel 3f; when the electromagnet 10 is powered off, the air inlet valve 11 moves upwards under the drive 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 of a solid structure, half of the sleeve is of a hollow structure, and a first through hole 4c and a second through hole 4d corresponding 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 on-off of the first through hole 4c and the second through hole 4d through the circular truncated cone structure 4b, so as to control the on-off of the volatile gas inlet channel 3c and the negative pressure cavity 3 e; 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, a special-shaped positioning groove 4a is formed at the top end of the solid structure of the sleeve 4, 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; during integral installation, the ferromagnetic plunger 5 is inserted into the sleeve 4, 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 to work, the electromagnet 10 is electrified, the air inlet valve 11 moves downwards under the action of electromagnetic force, and nitrogen enters the upper cavity of the negative pressure cavity 3 e; simultaneously, the piston 7 moves upwards against the spring force under the action of electromagnetic force and drives the ferromagnetic plunger 5 to move upwards to the round table structure 4b to block the communication between the volatile gas inlet channel 3c and the negative pressure cavity 3 e; at this time, the gas and 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 together 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 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 gravity, gas in the lower cavity of the negative pressure cavity 3e is extruded, the ferromagnetic plunger 5 is driven to move downwards, at the moment, the volatile gas inlet channel 3c is communicated with the negative pressure cavity 3e, and negative pressure is formed in the upper cavity of the negative pressure cavity 3e due to rapid change of the volume of the upper cavity of the negative pressure cavity 3e, so that external volatile gas enters the upper cavity of the negative pressure cavity 3e under the pushing of pressure difference. Through the cyclic operation of the process, the volatile gas collected in the upper cavity of the negative pressure cavity 3e can enter the lower cavity of the negative pressure cavity 3e after the electromagnet 10 is electrified, and is sent into the detection device through the air outlet channel 3d when the electromagnet 10 is powered off, and meanwhile, the upper cavity of the negative pressure cavity 3e can collect new volatile gas, so that the underground volatile gas can be efficiently and periodically detected.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (6)
1. Negative pressure integrated drill bit suitable for underground volatile gas gathers, including 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 (3 b) for placing a sleeve (4) and a ferromagnetic plunger (5) is arranged in the drill bit main body (3); the semipermeable membrane (9) is arranged on more than one volatile gas inlet channel (3 c) on the side surface of the drill bit main body (3); an electromagnet (10), a large spring (6), a piston (7) and a one-way valve (8) are sequentially arranged in a negative pressure cavity (3 e) 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 arranged in an air inlet channel (3 f) in the drill bit main body (3), and a sleeve (4), a ferromagnetic plunger (5), an electromagnet (10), a large spring (6), a piston (7), a one-way valve (8) and the air inlet valve (11) form a negative pressure system;
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 provided with an internal thread for connecting a feeding system; the drill bit body (3) is internally provided with a grid structure (3 a), a deep hole structure (3 b), more than one volatile gas inlet channel (3 c), an air outlet channel (3 d), a negative pressure cavity (3 e) and an air inlet channel (3 f); wherein the grid structure (3 a) is used for arranging the sensor; the deep hole structures (3 b) are equal in number and communicated with the volatile gas inlet channels (3 c), the deep hole structures (3 b) are communicated with the negative pressure cavity (3 e) through two through holes, and the two through holes are not at the same height; the air outlet channel (3 d) is L-shaped and is communicated with the negative pressure cavity (3 e) from the lower part, and the upper end of the air outlet channel (3 d) extends out of the drill bit main body (3); the air inlet channel (3 f) is in an inverted h shape, and the upper end of the air inlet channel (3 f) extends out of the drill bit main body (3) and is communicated with the negative pressure cavity (3 e).
2. 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 the same position as the extension parts of the air outlet channel (3 d) and the air inlet channel (3 f) of the drill bit main body (3), so that the cover plate (1) is sleeved on the drill bit main body (3).
3. The negative pressure integrated drill bit suitable for underground volatile gas collection according to claim 1, wherein: half of the sleeve (4) is of a solid structure, half of the sleeve is of a hollow structure, and a first through hole (4 c) and a second through hole (4 d) which correspond to the volatile gas inlet channel (3 c) and the negative pressure cavity (3 e) are formed in the hollow structure; a round table structure (4 b) is arranged between the first through hole (4 c) and the second through hole (4 d), and the ferromagnetic plunger (5) controls the on-off of the first through hole (4 c) and the second through hole (4 d) through the round table structure (4 b), so as to control the on-off of the volatile gas inlet channel (3 c) and the negative pressure cavity (3 e); in order to ensure the correct matching between the volatile gas inlet channel (3 c) and the negative pressure cavity (3 e) and the first through hole (4 c) and the second through hole (4 d), the top end of the solid structure of the sleeve (4) is provided with a special-shaped positioning groove (4 a), and the special-shaped positioning groove (4 a) is matched and connected with a special-shaped positioning block (1 a) on the cover plate (1).
4. 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 a ring magnet (7-2), wherein the ring magnet (7-2) is arranged between the upper rubber sealing ring (7-1) and the lower rubber sealing ring (7-3), the upper part of the upper rubber sealing ring (7-1) is an upper cavity of a negative pressure cavity (3 e), the lower part of the lower rubber sealing ring (7-3) is a lower cavity of the negative pressure cavity (3 e), and the ring 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 as to control the on-off between the volatile gas inlet channel (3 c) and the negative pressure cavity (3 e); 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 arranged at the lower end of the through hole formed in the lower rubber sealing ring (7-3), and the one-way valve (8) can only enable gas in the negative pressure cavity (3 e) to enter the lower cavity from the upper cavity.
5. The negative pressure integrated drill bit suitable for underground volatile gas collection according to claim 4, 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).
6. 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 drive of the electromagnetic force of the small magnet (11-3), so that the negative pressure cavity (3 e) 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 drive of the air inlet valve spring (11-1) to block the communication between the negative pressure cavity (3 e) and the air inlet channel (3 f).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN113090260A CN113090260A (en) | 2021-07-09 |
| CN113090260B true CN113090260B (en) | 2023-09-26 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113090260A (en) | 2021-07-09 |
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