In-situ stratum spectral measurement device in drill hole

Abstract

The utility model discloses an in-situ stratum spectral measurement device in a drill hole. The device comprises an upper plugging piece and a lower plugging piece, the lower plugging piece and the upper plugging piece are oppositely arranged at an interval; the equipment cabin is connected between the upper plugging piece and the lower plugging piece, and the equipment cabin is used for being lowered into a to-be-measured drill hole so as to perform spectral measurement on the in-situ stratum of the side wall of the to-be-measured drill hole; when the upper plugging piece and the lower plugging piece abut against the side wall of the to-be-detected drill hole, the upper plugging piece and the lower plugging piece cut off communication between the spaces, on the two sides of the upper plugging piece and the lower plugging piece, in the drill hole respectively, and therefore a closed space is formed between the upper plugging piece and the lower plugging piece. The flowable medium discharging assembly is used for discharging the flowable medium in the closed space out of the closed space; and the gas-liquid injection assembly is used for flushing the closed space and displacing air.

Description

Technical Field

[0001] The utility model relates to a stratum testing device, in particular to an in-situ stratum spectrum measuring device in a borehole. Background Art

[0002] Environmental monitoring, water and soil pollution investigations, geological exploration, and detailed geoscience research often require analysis of the composition, location, and content of various substances in strata. For example, environmental monitoring and investigations often require testing for heavy metals, petroleum hydrocarbons, monocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons, organochlorine, and organophosphorus in soil profiles. Geological exploration focuses on the elemental, mineral composition, and structure of soil and rock. Qualitative, quantitative, and localized analysis of these substances requires the use of various physical and chemical testing methods. Existing analytical methods are primarily divided into sampling and in-situ testing. Sampling and testing require drilling to obtain water and soil samples from specific layers and then return them to the laboratory for specialized analysis and testing. This is time-consuming, costly, and requires complex transportation, storage, and pre-processing. In-situ testing, on the other hand, primarily relies on electrochemical indicators such as conductivity and pH, making analysis of substance composition and content more challenging. Rapid spectral analysis techniques and instruments for drill cores have been developed, such as surface feature spectral scanners and core spectral scanners. However, the core needs to be taken out completely for ground testing, which is very difficult for loose and compressible soil strata.

[0003] Existing downhole spectral detection technologies, such as CN106567709A, CN114112990A and CN117005859A, all analyze drilling fluids. These drilling fluids undergo multiple cycles on the surface and underground, mixing substances from various surface and underground layers and cannot represent the material properties of the original formation. Utility Model Content

[0004] Purpose of the utility model: The technical problem to be solved by the utility model is to provide an in-situ stratum spectrum measurement device in a borehole in response to the deficiencies of the existing technology, which can accurately measure the in-situ stratum in the borehole.

[0005] In order to solve the above technical problems, the utility model discloses an in-situ formation spectrum measurement device in a borehole, which includes:

[0006] Upper sealing piece;

[0007] a lower blocking member spaced apart from the upper blocking member;

[0008] an equipment cabin connected between the upper and lower blocking members, the equipment cabin being configured to be lowered into the borehole to be measured to perform in-situ stratum spectral measurement of the sidewall of the borehole to be measured; when the upper and lower blocking members abut against the sidewall of the borehole to be measured, the upper and lower blocking members respectively cut off communication between the borehole spaces on either side thereof, thereby forming a closed space between the upper and lower blocking members;

[0009] a flowable medium discharge component, configured to discharge the flowable medium in the enclosed space to outside the enclosed space;

[0010] and a gas-liquid injection component for flushing the enclosed space and displacing air.

[0011] In some embodiments, the upper blocking member and the lower blocking member are both annular blocking airbags.

[0012] In some embodiments, the device includes an inflation tube for communicating with an external airbag inflation device, and both the upper blocking member and the lower blocking member are in communication with the inflation tube.

[0013] In some embodiments, the equipment cabin includes a middle hollow cabin body, an upper hollow cabin body connected to the upper end of the middle hollow cabin body, and a lower hollow cabin body connected to the lower end of the middle hollow cabin body. The upper sealing piece is mounted on the outside of the upper hollow cabin body, and the lower sealing piece is mounted on the lower hollow cabin body.

[0014] In some embodiments, the equipment cabin includes a spectrometer detector and an optical observation window. The spectrometer detector is equipped with a built-in light source and is used to perform in-situ spectral measurements of the sidewall of the borehole to be measured. The optical observation window is disposed on the sidewall of the central hollow cabin. The optical observation window is located in the optical path of the spectrometer detector.

[0015] In some embodiments, the equipment cabin includes a detector moving device installed in the central hollow cabin body. The detector moving device is configured to enable the spectrometer detector to move up and down in the central hollow cabin body.

[0016] In some embodiments, the equipment cabin includes a drill rod connecting rod, which is connected to the top of the upper hollow cabin body. The top of the upper hollow cabin body is provided with a threaded connection portion for rigid connection with a rigid drill rod.

[0017] In some embodiments, the flowable medium discharge assembly includes a flowable medium suction pump, a flowable medium discharge pipe, a check valve, and the flowable medium suction pipe. The flowable medium suction pump includes a top outlet and a bottom inlet. One end of the flowable medium suction pipe communicates with the enclosed space, and the other end communicates with the bottom inlet of the flowable medium suction pump. One end of the flowable medium discharge pipe communicates with the top outlet of the flowable medium suction pump, and the other end communicates with the exterior of the enclosed space. The check valve is mounted on the flowable medium discharge pipe.

[0018] In some embodiments, the flowable medium suction pump, the flowable medium discharge pipe, and the check valve are all housed in the upper hollow cabin. The other end of the flowable medium discharge pipe passes through the upper hollow cabin to communicate with the outside of the enclosed space.

[0019] In some embodiments, the gas-liquid injection assembly includes a cleaning nozzle and a water and gas supply pipe. The cleaning nozzle is mounted at the lower end of the upper hollow chamber and is configured to spray the enclosed space in a fan-shaped pattern. One end of the water and gas supply pipe is connected to the cleaning nozzle, and the other end passes through the upper hollow chamber and extends to the ground to connect to corresponding equipment.

[0020] Beneficial effects:

[0021] 1. The present invention provides an in-situ formation spectrum measurement device within a borehole. The device seals the borehole in sections with upper and lower plugging members to form an enclosed space. A flowable medium discharge assembly removes flowable medium, such as mud, from the enclosed space. A gas-liquid injection assembly cleans the enclosed space, such as the sidewalls of the borehole and the surface of the optical observation window, and replenishes water and air to balance the pressure inside and outside the enclosed space. The cleaned sidewalls of the borehole are then scanned longitudinally for in-situ formation detection through an equipment cabin. The present invention discharges mud from the enclosed space during detection, creating an environment where light can freely penetrate, thus satisfying the prerequisites for spectral detection. Furthermore, by cleaning the detected object and the optical observation window, interference from various formation mixtures caused by residual mud is reduced, making the spectral detection results of in-situ formation materials more realistic and accurate.

[0022] 2. One embodiment of the present invention adopts a rigid drill rod for connection and deployment, which has the advantage of more accurate longitudinal positioning compared to cable deployment.

[0023] 3. One embodiment of the present invention uses a detector moving device to move the spectrometer detector up and down in the central hollow cabin, thereby achieving complete and continuous scanning and detection of the side wall of the borehole. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and the above and / or other advantages of the present invention will become more apparent.

[0025] Figure 1 The figure is a schematic diagram of the cross-sectional structure of an in-situ formation spectrum measurement device in a borehole provided by an embodiment of the present invention when the airbag is not inflated.

[0026] Figure 2 The figure is a schematic diagram of the cross-sectional structure of an in-situ formation spectrum measurement device in a borehole provided by an embodiment of the present invention when the air bag is inflated.

[0027] Figure 3 yes Figure 1 Top view of the section passing through line AA.

[0028] Description of the accompanying drawings:

[0029] 1. Drill pipe connecting rod; 2. Upper hollow cabin; 3. Middle hollow cabin; 4. Lower hollow cabin; 5. Upper plugging piece; 6. Inflation pipe; 7. Flowable medium suction pump; 8. Flowable medium discharge pipe; 9. Check valve; 10. Flowable medium suction pipe; 11. Cleaning nozzle; 12. Water and air supply pipe; 13. Screw; 14. Spectrometer detector; 15. Optical observation window; 16. Power and signal lines; 17. Lower plugging piece; 18. Rigid drill pipe. DETAILED DESCRIPTION

[0030] The applicant discovered that various underground in-situ detection technologies have been unable to achieve breakthroughs because the borehole is filled with drilling fluid, primarily mud. Light cannot penetrate the mud, and the mud is mixed with various stratum materials, causing contamination and interference. Therefore, in-situ spectral measurement of the strata inside the borehole wall is impossible.

[0031] Example 1

[0032] Combine Figures 1 to 3As shown, an embodiment of the present utility model discloses an in-situ formation spectral measurement device in a borehole, which includes an upper sealing member 5, a lower sealing member 17, an equipment cabin, a flowable medium discharge assembly, and a gas-liquid injection assembly. The lower sealing member 17 is arranged relative to the upper sealing member 5. The equipment cabin is connected between the upper sealing member 5 and the lower sealing member 17, and the equipment cabin is used to be lowered into the borehole to be measured to perform spectral measurement of the in-situ formation on the side wall of the borehole to be measured. When the upper sealing member 5 and the lower sealing member 17 both abut the side wall of the borehole to be measured, the upper sealing member 5 and the lower sealing member 17 respectively cut off the communication between the spaces in the boreholes on both sides, thereby forming a closed space between the upper sealing member 5 and the lower sealing member 17. The flowable medium discharge assembly is used to discharge the flowable medium in the closed space to the outside of the closed space. The gas-liquid injection assembly is used to flush the closed space and displace air. Displacing air in this application means injecting air into the enclosed space through the gas-liquid injection assembly to maintain pressure balance inside and outside the enclosed space when the flowable medium in the enclosed space is discharged outside the enclosed space.

[0033] This embodiment forms an enclosed space by segmentally sealing the borehole with upper and lower plugging members. A flowable medium, such as mud, is removed from the enclosed space via a flowable medium discharge assembly. A gas-liquid injection assembly cleans the enclosed space, such as the sidewalls of the borehole and the surface of the optical observation window, replenishing water and air to balance the pressure inside and outside the enclosed space. The cleaned sidewalls of the borehole are then longitudinally scanned for in-situ formation detection via an equipment cabin. This utility model discharges mud from the enclosed space during detection, creating an environment where light can freely penetrate, thus satisfying the prerequisites for spectral detection. Furthermore, by cleaning the detected object and the optical observation window, interference from various formation mixtures caused by residual mud is reduced, resulting in more accurate and realistic spectral detection results of in-situ formation materials.

[0034] In some embodiments, combined Figure 1 and Figure 2 As shown, the upper blocking member 5 and the lower blocking member 17 are both annular blocking airbags.

[0035] In some embodiments, combined Figure 1 and Figure 2 As shown, the device includes an inflation tube 6, which is connected to both the upper and lower sealing members 5 and 17. The other end of the inflation tube 6 is connected to an external airbag inflation device to inflate the airbag. Specifically, the lower airbag 17 and the upper sealing member 5 share the inflation tube 6, with a three-way connection for air distribution. In some embodiments, the airbag inflation device is installed on the ground at the borehole entrance.

[0036] In some embodiments, combined Figure 1 and Figure 2As shown, the equipment cabin includes a central hollow cabin body 3, an upper hollow cabin body 2 connected to the upper end of the central hollow cabin body 3, and a lower hollow cabin body 4 connected to the lower end of the central hollow cabin body 3. An upper blocking member 5 is sleeved on the outer side of the upper hollow cabin body 2, and a lower blocking member 17 is sleeved on the lower hollow cabin body 4. In this embodiment, the upper hollow cabin body 2, the central hollow cabin body 3, and the lower hollow cabin body 4 are arranged in sequence from top to bottom and each has an independent inner cavity.

[0037] In some embodiments, combined Figure 1 and Figure 2 As shown, the equipment cabin includes a spectrometer detector 14 and an optical observation window 15. The spectrometer detector 14 is equipped with a built-in light source and is used to perform in-situ spectral measurements of the sidewall of the wellbore to be measured. The optical observation window 15 is located on the sidewall of the central hollow cabin 3. The optical observation window 15 is located in the optical path of the spectrometer detector 14. In a specific embodiment, the central hollow cabin 3 can be a hollow cylindrical structure made of quartz glass, and the optical observation window is a flat quartz glass observation window.

[0038] In some embodiments, the equipment cabin includes a detector moving device, which is installed in the central hollow cabin body 3. The detector moving device is configured to enable the spectrometer detector 14 to move up and down in the central hollow cabin body 3. In a specific embodiment, in combination with Figure 1 and Figure 2 As shown, the detector moving device can be a linear drive mechanism comprising a screw 13 and a motor. In this embodiment, the spectrometer detector 14 is connected to a slider threadedly connected to the screw 13. Driven by the motor, the screw 13 rotates, and the spectrometer detector 14 moves up and down along the screw 13. The detector moving device and the spectrometer detector 14 are respectively connected to corresponding power and signal cables 16. The power and signal cables 16 extend from bottom to top, passing through the middle hollow cabin 3 and the upper hollow cabin 2, respectively, to the ground, where they are connected to the corresponding power supply and control equipment.

[0039] In some embodiments, combined Figure 1 and Figure 2 As shown, the equipment cabin includes a drill rod connecting rod 1, which is connected to the top of the upper hollow cabin body 2. The top of the upper hollow cabin body 2 is provided with a threaded connection part for rigid connection with the rigid drill rod 18.

[0040] In some embodiments, combined Figure 1 and Figure 2As shown, the flowable medium discharge assembly includes a flowable medium suction pump 7, a flowable medium discharge pipe 8, a check valve 9, and a flowable medium suction pipe 10. The flowable medium suction pump 7 includes a top outlet and a bottom inlet. One end of the flowable medium suction pipe 10 communicates with the enclosed space, and the other end communicates with the bottom inlet of the flowable medium suction pump 7. One end of the flowable medium discharge pipe 8 communicates with the top outlet of the flowable medium suction pump 7, and the other end communicates with the outside of the enclosed space, thereby discharging the flowable medium, such as slurry, pumped out of the enclosed space by the flowable medium suction pump 7. Figure 1 and Figure 2 The middle curved arrow represents the flow direction of the mud. The check valve 9 is installed on the flowable medium discharge pipe 8.

[0041] It should be understood that the number of flowable medium discharge assemblies can be adjusted according to actual needs, for example Figure 3 The device is provided with two sets of flowable medium discharge components.

[0042] In some embodiments, combined Figure 1 and Figure 2 As shown, a flowable medium suction pump 7, a flowable medium discharge pipe 8, and a check valve 9 are all housed within the upper hollow chamber 2. The other end of the flowable medium discharge pipe 8 extends through the upper hollow chamber 2 to communicate with the exterior of the enclosed space. In a specific embodiment, the flowable medium suction pump 7 is disposed outside the middle hollow chamber 3 and extends to near the bottom of the middle hollow chamber 3, communicating with the enclosed space, for extracting flowable medium such as slurry from the bottom of the enclosed space.

[0043] In some embodiments, combined Figure 1 and Figure 2 As shown, the gas-liquid injection assembly includes a cleaning nozzle 11 and a water and air supply pipe 12. The cleaning nozzle 11 is mounted at the lower end of the upper hollow chamber 2 and is configured to spray the enclosed space in a fan-shaped pattern. One end of the water and air supply pipe 12 is connected to the cleaning nozzle 11, and the other end passes through the upper hollow chamber 2 and extends to the ground to connect to corresponding equipment. This is used to supply cleaning water and displacement air to the cleaning nozzle 11.

[0044] In some embodiments, the interior of the lower hollow cabin 4 can be used to place counterweights and serve as redundant space for future upgrades and integration of other components.

[0045] When in use, the device provided by the present invention is connected to the rigid drill rod 18. The power and signal lines 16, the water and air pipes 12, and the inflation pipe 6 are arranged together and then lowered along with the rigid drill rod 18 to the position in the borehole where measurement is required.

[0046] Once the lower section is in place, the upper and lower airbags are inflated using the inflation tube 6. Once the airbags are pressed against the borehole sidewall, a closed space is formed. The flowable medium suction pump 7 is then activated to extract the slurry from the closed section and transport it outside the upper hollow chamber 2. The check valve 9 prevents backflow. Simultaneously, air is delivered through the water and air pipes 12 to replenish the vacuum created by the suction of the slurry in the closed space and balance the internal and external pressures. Once the slurry is completely extracted, the water and air pipes 12 are used to spray water to clean the borehole sidewall surface to be measured and the outer wall of the equipment compartment on the same side as the quartz glass observation window. Simultaneously, the mud suction pump 7 is activated to remove the cleaning wastewater. Once cleaning is complete, the spectrometer detector 14 can be activated, moving up and down along the screw 13 to scan the soil cross-section of the borehole sidewall surface to be measured.

[0047] Furthermore, the ground-facing portions of the water and air supply pipes 12 and the inflation pipe 6 can be combined if necessary, with a switching valve providing switching between water and air supply to save volume and weight. The airbags can also be inflated with water to reduce buoyancy and counterweight. The water source can be local well water, requiring a filtration device, or clean water delivered by the combined water and air supply pipes.

[0048] This utility model provides a concept and method for an in-situ formation spectrum measurement device within a borehole. There are numerous methods and approaches for implementing this technical solution. The above description is merely a preferred embodiment of the utility model. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the utility model, and such improvements and modifications should be considered within the scope of protection of the utility model. Any components not specified in this embodiment may be implemented using existing technologies.

Claims

1. An in-situ formation spectrum measurement device in a borehole, characterized in that: include: Upper sealing member (5); a lower blocking member (17) spaced apart from the upper blocking member (5); an equipment cabin connected between the upper blocking member (5) and the lower blocking member (17), the equipment cabin being used to be lowered into the borehole to be measured to perform spectral measurement of the in-situ formation on the side wall of the borehole to be measured; when the upper blocking member (5) and the lower blocking member (17) both abut against the side wall of the borehole to be measured, the upper blocking member (5) and the lower blocking member (17) respectively cut off the communication between the spaces in the boreholes on both sides thereof, thereby forming a closed space between the upper blocking member (5) and the lower blocking member (17); a flowable medium discharge component, configured to discharge the flowable medium in the enclosed space to outside the enclosed space; and a gas-liquid injection component for flushing the enclosed space and displacing air.

2. The in-situ formation spectrum measurement device in a borehole according to claim 1, characterized in that: The upper blocking piece (5) and the lower blocking piece (17) are both annular blocking airbags.

3. The in-situ formation spectrum measurement device in a borehole according to claim 2, characterized in that: It comprises an inflation tube (6) for communicating with an external airbag inflation device, and the upper blocking member (5) and the lower blocking member (17) are both in communication with the inflation tube (6).

4. The in-situ formation spectrum measurement device in a borehole according to claim 3, characterized in that: The equipment cabin comprises a middle hollow cabin body (3), an upper hollow cabin body (2) connected to the upper end of the middle hollow cabin body (3), and a lower hollow cabin body (4) connected to the lower end of the middle hollow cabin body (3); the upper sealing member (5) is sleeved on the outer side of the upper hollow cabin body (2), and the lower sealing member (17) is sleeved on the lower hollow cabin body (4).

5. The in-situ formation spectrum measurement device in a borehole according to claim 4, characterized in that: The equipment cabin comprises a spectrometer detector (14) and an optical observation window (15); the spectrometer detector (14) is provided with a self-contained light source, and the spectrometer detector (14) is used to perform spectral measurement on the in-situ formation of the side wall of the borehole to be measured; the optical observation window (15) is provided on the side wall of the middle hollow cabin body (3); and the optical observation window (15) is located on the optical path of the spectrometer detector (14).

6. The in-situ formation spectrum measurement device in a borehole according to claim 5, characterized in that: The equipment cabin comprises a detector moving device, which is installed in the middle hollow cabin body (3); the detector moving device is configured to enable the spectrometer detector (14) to move up and down in the middle hollow cabin body (3).

7. The in-situ formation spectrum measurement device in a borehole according to claim 5, characterized in that: The equipment cabin comprises a drill rod connecting rod (1), the drill rod connecting rod (1) is connected to the top end of the upper hollow cabin body (2), and the top end of the upper hollow cabin body (2) is provided with a threaded connection portion for rigid connection with a rigid drill rod (18).

8. The in-situ formation spectrum measurement device in a borehole according to claim 4, characterized in that: The flowable medium discharge assembly comprises a flowable medium suction pump (7), a flowable medium discharge pipe (8), a check valve (9) and a flowable medium suction pipe (10), wherein the flowable medium suction pump (7) comprises a top outlet and a bottom inlet; one end of the flowable medium suction pipe (10) is connected to the closed space, and the other end is connected to the bottom inlet of the flowable medium suction pump (7); one end of the flowable medium discharge pipe (8) is connected to the top outlet of the flowable medium suction pump (7), and the other end is connected to the outside of the closed space; the check valve (9) is installed on the flowable medium discharge pipe (8).

9. The in-situ formation spectrum measurement device in a borehole according to claim 8, characterized in that: The flowable medium suction pump (7), the flowable medium discharge pipe (8) and the check valve (9) are all housed in the upper hollow cabin (2); the other end of the flowable medium discharge pipe (8) passes through the upper hollow cabin (2) and communicates with the outside of the enclosed space.

10. The in-situ formation spectrum measurement device in a borehole according to claim 4, characterized in that: The gas-liquid injection assembly comprises a cleaning nozzle (11) and a water and air supply pipe (12); the cleaning nozzle (11) is installed at the lower end of the upper hollow cabin (2) and is configured to spray the enclosed space in a fan-shaped manner; one end of the water and air supply pipe (12) is connected to the cleaning nozzle (11), and the other end passes through the upper hollow cabin (2) and extends to the ground to be connected to corresponding equipment.

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