CN112525591A - Gas sampling device and rock stratum sample and gas sample corresponding method - Google Patents
Gas sampling device and rock stratum sample and gas sample corresponding method Download PDFInfo
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- CN112525591A CN112525591A CN202011322971.XA CN202011322971A CN112525591A CN 112525591 A CN112525591 A CN 112525591A CN 202011322971 A CN202011322971 A CN 202011322971A CN 112525591 A CN112525591 A CN 112525591A
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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
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
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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
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2294—Sampling soil gases or the like
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a gas sampling device and a corresponding method of a rock stratum sample and a gas sample, comprising a shell sleeved on a drill rod, a gas collecting bag detachably arranged in the shell and a gas pump; the input end of the air pump is communicated with the rock stratum sampler cavity, and the output end of the air pump is communicated with the gas collecting bag. The gas sampling device is additionally arranged on the existing drilling equipment, so that a rock stratum sample and a gas sample can be obtained at the same time, particularly, after the two samples are collected at the same time, the associated information is recorded and stored, a stable corresponding relation is established, and the influence on an analysis result caused by the contrast error of the rock stratum sample and the gas sample in the analysis process is avoided.
Description
Technical Field
The invention belongs to the field of geological exploration, and particularly relates to a gas sampling device and a rock stratum sample and gas sample corresponding method.
Background
The main objective of geological exploration is to obtain samples to analyze the formation structure, determine whether deposits are present or not or to determine whether a building is suitable for construction. The existing drilling equipment adopts a structure that a drill bit, a rock stratum sampler and a drill rod are sequentially connected, the drill rod is jacked into the rock stratum sampler and the drill bit drills downwards, the drill bit separates a columnar rock stratum sample in the drilling process and enters a cavity of the sampler, the drill rod is retracted along with the drilling equipment, the rock stratum sample and the rock stratum sampler are taken out of the ground together, and information of the rock stratum sample is stored and recorded.
Large quantities of gases, such as natural gas and petroleum gas, are also present in the formation as resources for mineral deposits. There are also various chemical component gases formed in the caverns in the subterranean formation. The existing drilling equipment cannot extract a gas sample while acquiring a rock stratum sample, and if rock stratum sample acquisition is performed first and then gas sample acquisition is performed, the problem that the corresponding relation between the rock stratum sample and the gas sample cannot be established easily occurs, and the accuracy of an exploration analysis result cannot be improved through mutual verification of information of the two samples.
In view of the foregoing, there is a need for a gas sampling device that can be installed on existing drilling equipment to obtain a formation sample while simultaneously obtaining a gas sample from a formation; and corresponding relation can be established between the rock stratum sample and the gas sample.
Disclosure of Invention
The invention aims to provide a gas sampling device which is added to the existing drilling equipment and can acquire a gas sample while acquiring a rock stratum sample.
The invention is realized by the following technical scheme:
a gas sampling device comprises a shell sleeved on a drill rod, a gas collecting bag detachably arranged in the shell and a gas pump; the input end of the air pump is communicated with the rock stratum sampler cavity, and the output end of the air pump is communicated with the gas collecting bag.
Through the scheme, the invention at least obtains the following technical effects:
this gas sampling device uses gas collection bag as the splendid attire carrier, and the casing is got the protection of bag with gas collection, avoids gas collection bag to cause the damage with the stratum friction in the drilling to leak. The rock stratum sampler cavity and the gas collecting bag are communicated through two ends of the gas pump, gas in the stratum enters the rock stratum sampler cavity together with the rock stratum sample in the drilling process, the gas in the rock stratum sampler cavity is pumped by the gas pump and then filled into the gas collecting bag for storage, and the purpose of synchronously obtaining the gas sample and the rock stratum sample is achieved.
As an additional device, the gas sampling device is applicable to various drilling equipment, and the structure of the original drilling equipment is minimally changed in the installation process, so that the gas sampling device has very wide applicability and practicability.
Preferably, the input end of the air pump is communicated with the rock stratum sampler cavity through an air guide pipe, an exhaust pipe is arranged on the air guide pipe between the air pump and the rock stratum sampler cavity, one end of the exhaust pipe is communicated with the air guide pipe, and the other end of the exhaust pipe is communicated with a one-way exhaust valve arranged outside the rock stratum sampler.
Preferably, the device also comprises a trigger switch arranged in the rock stratum sampler cavity, and the trigger switch is electrically connected with the air pump; and after entering the rock stratum sampler cavity, the rock stratum sample is contacted with the trigger switch and the air pump is started.
Preferably, the surface of the trigger switch is provided with an elastic sealing layer.
Preferably, a one-way air inlet valve is arranged at an air inlet communicated with the output end of the air pump.
Preferably, the shell is formed by splicing two semi-cylindrical hollow shells which are mirror images of each other.
Preferably, the gas collection bag is constructed of a rubber material.
The invention also aims to: the method for establishing the corresponding relation between the rock stratum sample and the gas sample is provided, and the rock stratum sample and the gas sample obtained in the same drilling process are correspondingly recorded and stored.
A method for establishing a corresponding relation between a rock stratum sample and a gas sample comprises a drill bit, a rock stratum sampler, a drill rod and a gas sampling device; the gas sampling device is the gas sampling device in the scheme, and the specific method comprises the following steps:
the drill rod pushes the rock stratum sampler and a drill bit arranged at the bottom of the rock stratum sampler to drill towards the stratum, and the gas sampling device is hung on the drill rod and is communicated with a rock stratum sampler cavity; during drilling, the drill bit sends the separated rock stratum sample into a rock stratum sampler cavity, and the gas sample along with the rock stratum sample is filled into a gas collecting bag by a gas pump; and after recovery, taking out the rock stratum sample and the gas collecting bag filled with the gas sample, recording the correlated information and then storing.
Through the scheme, the invention at least obtains the following technical effects:
the drilling equipment combined with the gas sampling device can obtain rock stratum samples and gas samples at the same depth in one drilling process, the sampling parameters of the rock stratum samples and the gas samples are the same, and after the correlated information is recorded and stored, the influence on the analysis result caused by the corresponding error of the rock stratum samples and the gas samples can be effectively avoided.
The invention has the beneficial effects that:
the gas sampling device is additionally arranged on the existing drilling equipment, so that a rock stratum sample and a gas sample can be obtained at the same time, particularly, after the two samples are collected at the same time, the associated information is recorded and stored, a stable corresponding relation is established, and the influence on an analysis result caused by the contrast error of the rock stratum sample and the gas sample in the analysis process is avoided.
Drawings
Fig. 1 is a schematic view of an overall structure of a gas sampling apparatus according to an embodiment of the present invention.
Fig. 2 is a partially enlarged schematic structural diagram of an air pump according to an embodiment of the present invention.
Fig. 3 is a partially enlarged structural schematic view of a trigger switch and an elastic sealing layer according to an embodiment of the present invention.
Legend:
1, a shell; 2, a gas collection bag; 3, an air pump; 4, drilling a drill pipe; 5, a rock stratum sampler; 6, an air duct; 7, a drill bit; 8 formation sample
21 a one-way intake valve;
31 triggering a switch; 32 an elastomeric sealing layer;
61 an exhaust pipe; 62 one-way exhaust valve.
Detailed Description
The invention is further illustrated by the following figures and examples.
Example 1:
as shown in fig. 1, convex 2 and fig. 3, the present embodiment provides a gas sampling device, which is composed of a housing 1, a gas collecting bag 2 and a gas pump 3; on drilling rod 4 was located to casing 1 cover, gaseous collection bag 2 detachably accomodates in casing 1, 3 inputs of air pump pass through air duct 6 and 5 cavity intercommunications of stratum sampler, the output of air pump 3 then with set up the one-way admission valve 21 intercommunication on gaseous collection bag 2, form the gas circuit of gathering bag 2 air feed by 5 cavities of stratum sampler to gas, at the in-process that acquires stratum sample 8, can fill the gaseous sample that gets into 5 cavities of stratum sampler along with stratum sample 8 and preserve in gaseous collection bag 2.
Because the air tightness of the cavity of the conventional rock stratum sampler 5 is poor, the vacuum pumping treatment cannot be carried out before the drilling down to remove the interference gas. Therefore, an exhaust pipe 61 and a one-way exhaust valve 62 are required to be additionally arranged on the gas guide pipe 6, and as the rock formation sample 8 enters the cavity of the rock formation sampler 5, the interference gas originally existing in the cavity of the rock formation sampler 5 is extruded, and the interference gas is exhausted from the one-way exhaust valve 62 through the exhaust pipe 61 in the state that the gas pump 3 is not opened. After the air pump 3 is opened, the gas sample in the rock stratum sampler 5 is pumped to fill the gas collection bag 2, and the gas path of the exhaust pipe 61 is in a closed state due to the one-way passing effect of the one-way exhaust valve 62, so that the external interference gas cannot flow back into the gas collection bag 2.
During drilling, the formation sample 8 gradually enters the cavity of the formation sampler 5 as the drilling depth increases. In order to further remove the interference gas in the cavity of the rock stratum sampler 5, a trigger switch 31 is arranged on the inner wall of the rock stratum sampler 5, and the trigger switch 31 is electrically connected with the air pump 3 to be used as a trigger device for starting the air pump 3. When the rock formation sample 8 enters the rock formation sampler 5 for a sufficient length and contacts the trigger switch 31, the gas pump 3 starts to pump the gas sample from the rock formation sampler 5 into the gas collection bag 2. Since the interference gas in the formation sampler 5 is mostly squeezed by the formation sample 8, the influence of the residual small amount of interference gas on the gas sample is greatly reduced.
It should be mentioned that the trigger switch 31 may be a plate-like switch structure with one end hinged to the inner wall of the rock layer sampler 5, the trigger switch 31 is in an off state when protruding out of the inner wall of the rock layer sampler 5, and the air pump 3 is in standby; when the trigger switch 31 is turned over and attached to the inner wall surface of the rock stratum sampler 5 by the top pressure contact of the rock stratum sample 8, the state is switched to the closed state, and the air pump 3 is started.
Because the formation environment is complex, the sample form collected in the rock stratum sampler 5 can have forms of mud, liquid and the like besides solid columnar form, and in order to prevent the trigger switch 31 from being affected with damp or being soaked to be out of order, the surface of the trigger switch 31 is covered with the elastic sealing layer 32, so that the trigger switch 31 can be ensured to move freely and simultaneously has the sealing effect. The elastic sealing layer 32 may be made of waterproof, insulating grass having high heat resistance.
The drill bit 7, the rock stratum sampler 5 and the drill rod 4 are mostly of cylindrical structures, so the shell 1 is also cylindrical and is formed by butting two half cylindrical hollow shells, and the two half cylindrical hollow shells are formed by sectioning the same hollow cylinder into two halves along the plane of the central axis. The butt joint part of the two half cylindrical shells extends out of the mounting lug and is fixedly connected through the bolt, so that the mounting and the dismounting are convenient. Offer in the center of casing 1 and dodge the hole with adaptation drilling rod 4, form annular storage space between the inner chamber of casing 1 and drilling rod 4, gaseous collection bag 2 is accomodate in this annular storage space.
The gas collection bag 2 is made of a rubber material, and the inside thereof is in a vacuum state when not filled with a gas sample.
Example 2:
as shown in fig. 1, convex 2 and fig. 3, this embodiment provides a method for establishing a correspondence relationship between a formation sample and a gas sample based on embodiment 1, and the method includes a drill bit 7, a formation sampler 5, a drill rod 4 and a gas sampling device; the gas sampling device in example 1 is a specific method as follows:
the drill pipe 4 pushes the rock layer sampler 5 and a drill bit 7 arranged at the bottom of the rock layer sampler 5 to drill towards the stratum, and the gas sampling device is hung on the drill pipe 4 and is communicated with a cavity of the rock layer sampler 5; in the drilling process, the drill 7 sends the separated rock stratum sample 8 into a cavity of the rock stratum sampler 5, and the gas along with the rock stratum sample 8 is filled into the gas collecting bag 2 by the gas pump 3 for storage; after the drill pipe 4 is recovered, the rock formation sample 8 and the gas collection bag 2 containing the gas sample are taken out, and the information correlated with each other is recorded and stored.
The core of the method is that the rock stratum sample 8 and the gas sample are collected in the same batch, the collected information of the same batch is recorded, and the same batch is stored. And the corresponding relation between the two samples is established according to the same acquisition sequence, the associated recording information and the same storage sequence, so that the influence on the analysis result of geological exploration caused by disorder of the corresponding relation between the two samples is avoided.
Various technical features in the above embodiments may be arbitrarily combined as long as there is no conflict or contradiction in the combination between the features, but is limited to the space and is not described one by one.
The present invention is not limited to the above-described embodiments, and various changes and modifications of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.
Claims (8)
1. A gas sampling device is characterized by comprising a shell sleeved on a drill rod, a gas collecting bag detachably arranged in the shell and a gas pump; the input end of the air pump is communicated with the rock stratum sampler cavity, and the output end of the air pump is communicated with the gas collecting bag.
2. The gas sampling device according to claim 1, wherein the input end of the air pump is communicated with the rock stratum sampler cavity through an air guide pipe, an exhaust pipe is arranged on the air guide pipe between the air pump and the rock stratum sampler cavity, one end of the exhaust pipe is communicated with the air guide pipe, and the other end of the exhaust pipe is communicated with a one-way exhaust valve arranged outside the rock stratum sampler.
3. The gas sampling device of claim 1, further comprising a trigger switch disposed in the formation sampler chamber, the trigger switch being electrically connected to the gas pump; and after entering the rock stratum sampler cavity, the rock stratum sample is contacted with the trigger switch and the air pump is started.
4. A gas sampling device according to claim 3 wherein the trigger switch surface is provided with an elastomeric sealing layer.
5. The gas sampling device according to claim 1, wherein a one-way air inlet valve is arranged at an air inlet of the gas collection bag communicated with the output end of the air pump.
6. The gas sampling device of claim 1, wherein the housing is formed by two half-cylindrical shells that are mirror images of each other.
7. The gas sampling device of claim 1, wherein the gas collection bag is constructed of a rubber material.
8. A method for establishing a corresponding relation between a rock stratum sample and a gas sample is characterized by comprising a drill bit, a rock stratum sampler, a drill rod and a gas sampling device; the gas sampling device is the gas sampling device of claim 1, and the specific method is as follows:
the drill rod pushes the rock stratum sampler and a drill bit arranged at the bottom of the rock stratum sampler to drill towards the stratum, and the gas sampling device is hung on the drill rod and is communicated with a rock stratum sampler cavity; during drilling, the drill bit sends the separated rock stratum sample into a rock stratum sampler cavity, and the gas sample along with the rock stratum sample is filled into a gas collecting bag by a gas pump; and after recovery, taking out the rock stratum sample and the gas collecting bag filled with the gas sample, recording the correlated information and then storing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011322971.XA CN112525591A (en) | 2020-11-23 | 2020-11-23 | Gas sampling device and rock stratum sample and gas sample corresponding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011322971.XA CN112525591A (en) | 2020-11-23 | 2020-11-23 | Gas sampling device and rock stratum sample and gas sample corresponding method |
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| CN112525591A true CN112525591A (en) | 2021-03-19 |
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| CN202305283U (en) * | 2011-10-17 | 2012-07-04 | 河南龙宇煤化工有限公司 | Gas sampling bag with non-return valves |
| CN104897431A (en) * | 2015-05-12 | 2015-09-09 | 中国石油天然气集团公司 | Free hydrocarbon and soil sample collecting device and collecting method |
| CN105403439A (en) * | 2015-12-21 | 2016-03-16 | 河北工程大学 | Coal seam gas sampling device |
| CN205228864U (en) * | 2015-12-17 | 2016-05-11 | 余裕超 | Portable ground sampling device |
| CN206020118U (en) * | 2016-08-30 | 2017-03-15 | 云南坤发环境科技有限公司 | A kind of multichannel atmosphere sampler |
| CN207231845U (en) * | 2017-09-08 | 2018-04-13 | 孔祥成 | A kind of Sewage Sampler |
| CN207423609U (en) * | 2017-11-16 | 2018-05-29 | 天津市环境保护科学研究院 | Soil gas detection device |
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| CN111024452A (en) * | 2020-01-09 | 2020-04-17 | 中国科学院武汉岩土力学研究所 | Novel water-gas synchronous sampling probe for rock-soil stratum |
| CN210893730U (en) * | 2019-11-01 | 2020-06-30 | 高凯 | Geotechnical engineering reconnaissance sampling device |
| CN211013719U (en) * | 2019-11-19 | 2020-07-14 | 华晋焦煤有限责任公司 | Coal mine mountain gas sampling device |
-
2020
- 2020-11-23 CN CN202011322971.XA patent/CN112525591A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202305283U (en) * | 2011-10-17 | 2012-07-04 | 河南龙宇煤化工有限公司 | Gas sampling bag with non-return valves |
| CN104897431A (en) * | 2015-05-12 | 2015-09-09 | 中国石油天然气集团公司 | Free hydrocarbon and soil sample collecting device and collecting method |
| CN205228864U (en) * | 2015-12-17 | 2016-05-11 | 余裕超 | Portable ground sampling device |
| CN105403439A (en) * | 2015-12-21 | 2016-03-16 | 河北工程大学 | Coal seam gas sampling device |
| CN206020118U (en) * | 2016-08-30 | 2017-03-15 | 云南坤发环境科技有限公司 | A kind of multichannel atmosphere sampler |
| CN207231845U (en) * | 2017-09-08 | 2018-04-13 | 孔祥成 | A kind of Sewage Sampler |
| CN207423609U (en) * | 2017-11-16 | 2018-05-29 | 天津市环境保护科学研究院 | Soil gas detection device |
| WO2019140975A1 (en) * | 2018-01-16 | 2019-07-25 | 河南理工大学 | Reciprocating sampling method and device for use in fixed-point sampling of gas content |
| CN110726582A (en) * | 2019-11-01 | 2020-01-24 | 磐安叶层煤矿设备有限公司 | Coal field geological exploration sampling device |
| CN210893730U (en) * | 2019-11-01 | 2020-06-30 | 高凯 | Geotechnical engineering reconnaissance sampling device |
| CN211013719U (en) * | 2019-11-19 | 2020-07-14 | 华晋焦煤有限责任公司 | Coal mine mountain gas sampling device |
| CN111024452A (en) * | 2020-01-09 | 2020-04-17 | 中国科学院武汉岩土力学研究所 | Novel water-gas synchronous sampling probe for rock-soil stratum |
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Application publication date: 20210319 |