Drilling well gas detection device for gas field exploration

Abstract

The invention discloses a drilling well gas detection device for gas field exploration, and relates to the technical field of gas detection, the drilling well gas detection device comprises a protection cylinder, two ends of the protection cylinder are both shrunk inwards to form mounting holes; the detection tube penetrates through the protection cylinder and is connected with the mounting hole in a sliding manner; the detector is arranged in the detection tube, the detector is provided with a plurality of detection heads, and the detection heads are embedded in the outer surface of the detection tube; the annular groove is formed in the outer surface of the detection pipe, an air inlet sleeve is fixed in the annular groove, a gap exists between the inner surface of the air inlet sleeve and the groove bottom of the annular groove, and the outer surface of the air inlet sleeve is flush with the detection pipe; and the position adjusting assembly at least can drive the detection pipe to move axially so as to adjust the relative position of the detection head according to the impact force of the detected gas, and the detection mode is diversified, so that the detection device can adapt to different detection environments.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection, and particularly to a gas detection device for drilling wells in gas field exploration. Background Art

[0002] In the field of gas field exploration, gas detection in drilling wells is a crucial link, which can provide exploration personnel with important information such as underground gas composition and concentration, and plays a decisive role in accurately evaluating gas field reserves and judging the feasibility of exploitation.

[0003] In terms of gas detection function, existing detection devices lack an effective response mechanism to gas impact forces of different intensities. In a drilling well, the gas impact force is not constant, but fluctuates greatly with various factors such as drilling depth and geological conditions. Among them, when the gas impact force exceeds a certain limit, existing devices lack effective protection measures, and the detection head is easily damaged due to excessive impact force, which not only increases the equipment maintenance and replacement costs, but also seriously affects the normal progress of the detection work. In terms of the function of removing impurities, there are usually a large amount of dust and other impurities in the drilling well. Existing detection devices perform poorly in removing impurities. Most of them lack an effective impurity removal structure, or their removal structure cannot adjust the scraping force in real time according to the actual situation.

[0004] Therefore, it is necessary to provide a gas detection device for drilling wells in gas field exploration to solve the above problems. Summary of the Invention

[0005] To solve the above problems, the present invention provides the following technical solutions: A gas detection device for drilling wells in gas field exploration, comprising:

[0006] A protection cylinder, both ends of which are open and inwardly contracted to form mounting holes;

[0007] A detection tube, which penetrates through the protection cylinder and is slidably connected to the mounting holes;

[0008] A detector, which is built in the detection tube, and the detector has a plurality of detection heads, and the detection heads are embedded in the outer surface of the detection tube;

[0009] A ring groove, which is opened on the outer surface of the detection tube, and an air inlet sleeve is fixed in the ring groove. There is a gap between the inner surface of the air inlet sleeve and the bottom of the ring groove, and the outer surface of the air inlet sleeve is flush with the detection tube;

[0010] A position adjustment assembly, which can at least drive the detection tube to move axially so as to adjust the relative position of the detection head according to the impact force of the detected gas.

[0011] Preferably, when the impact force of the detected gas is greater than the threshold value, the detection head is adjusted to be hidden inside the protection cylinder, and at this time, the intake sleeve is partially extended out of the protection cylinder; when the impact force of the detected gas is less than the threshold value, the detection head is adjusted to extend out of the protection cylinder.

[0012] Preferably, an exhaust device is also embedded in the protection cylinder, and the exhaust device is used to provide gas guidance for the detection head when the detection head is hidden inside the protection cylinder.

[0013] Preferably, when the detection head is hidden inside the protection cylinder, the detection head is arranged facing the exhaust device, and the projection of the detection head facing the exhaust device covers the central axis of the exhaust device.

[0014] Preferably, the exhaust device is arranged near the end of the protection cylinder.

[0015] Preferably, a spiral groove is formed on the outer surface of the detection tube;

[0016] The position adjustment assembly includes:

[0017] A driving wheel, which is fixed to the inner wall of the protection cylinder and is used to drive the detection tube to rotate self - rotatably;

[0018] A nut seat, which is fixed to the inner wall of the protection cylinder and is engaged with the spiral groove of the detection tube, and a through - shaped guiding hole is formed on the nut seat.

[0019] Preferably, a sealing plate corresponding to the guiding hole is fixed on the outer surface of the detection tube, a sealing disc corresponding to the guiding hole is fixed on the sealing plate, and a pressure sensor is also embedded in the sealing plate.

[0020] Preferably, the intake sleeve is a filter structure, and a plurality of support members are installed between the inner surface of the intake sleeve and the bottom of the annular groove for supporting the intake sleeve.

[0021] Preferably, a dust scraping assembly corresponding to the intake sleeve is also arranged outside the protection cylinder, and the dust scraping assembly includes:

[0022] A scraping seat, which is fixed to the outer wall of one end of the protection cylinder, and a limiting plate is fixed in the scraping seat;

[0023] Two symmetrically arranged scraping plates, which are arranged on the limiting plate in a limited - sliding manner;

[0024] An elastic member, which is connected between the scraping seat and the scraping plate;

[0025] Wherein, the two scraping plates form a horn shape.

[0026] Preferably, the elastic member includes two symmetrically arranged elastic seats, a spring is connected between the two elastic seats, and an electromagnetic adjustment member is embedded in each elastic seat.

[0027] Compared with the prior art, the present invention provides a gas detection device for drilling wells in gas field exploration, which has the following beneficial effects:

[0028] In the present invention, when the gas impact force is less than the threshold value, the detection head extends out of the protection cylinder, and gas samples at different positions and directions can be widely collected to achieve comprehensive and accurate sampling and detection; when the impact force exceeds the threshold value, the detection head retracts into the protection cylinder to avoid damage. At the same time, the intake sleeve extends out halfway to form a tortuous gas path, allowing part of the gas to enter the protection cylinder, so that the detection head can still detect the gas while being protected, ensuring the continuous progress of the detection work under the impact of harsh airflows.

[0029] In the present invention, the horn-shaped double-scraper structure cooperates with the electromagnetic adjustment elastic member to adjust the scraping force in real time. During the telescopic process of the intake sleeve, while dynamically removing surface impurities, the contact pressure between the scraper and the sleeve is precisely controlled by electromagnetic force, which not only ensures the dust removal efficiency but also avoids excessive wear, significantly prolongs the service life of key components, and adapts to the high-dust underground environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic cross-sectional structure diagram of a gas detection device for drilling wells in gas field exploration Figure 1 ;

[0031] Figure 2 is a schematic cross-sectional structure diagram of a gas detection device for drilling wells in gas field exploration Figure 2 ;

[0032] Figure 3 is a schematic cross-sectional structure diagram of a gas detection device for drilling wells in gas field exploration Figure 3 ;

[0033] Figure 4 is a schematic cross-sectional structure diagram of the dust scraping assembly in the present invention;

[0034] Figure 5 is a schematic cross-sectional structure diagram of the elastic member in the present invention;

[0035] In the figure: 1, protection cylinder; 2, detection tube; 3, detector; 4, detection head; 5, sealing sleeve; 6, intake sleeve; 7, spiral groove; 8, driving wheel; 9, nut seat; 10, guiding hole; 11, exhaust device; 12, blocking plate; 13, blocking disk; 14, pressure sensor; 15, dust scraping assembly; 151, scraping seat; 152, limiting plate; 153, scraper; 154, elastic member; 1541, elastic seat; 1542, electromagnetic adjustment member; 1543, spring. DETAILED DESCRIPTION OF THE INVENTION

[0036] In the description and claims of this application and the above description of the drawings, terms such as "first" and "second" are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is only a way of distinguishing objects with the same attributes when describing the embodiments of this application. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, so that a process, method, system, product or device including a series of units does not have to be limited to those units, but may include other units not clearly listed or inherent to these processes, methods, products or devices.

[0037] Embodiment: Please refer to Figures 1 - 5 , in an embodiment of the present invention, a gas detection device for drilling wells in gas field exploration is provided, including:

[0038] A protection cylinder 1, both ends of which open inward and contract to form mounting holes;

[0039] A detection tube 2, which penetrates through the protection cylinder 1 and is slidably connected to the mounting holes;

[0040] A detector 3, which is built into the detection tube 2, and the detector 3 has a plurality of detection heads 4, and the detection heads 4 are fitted to the outer surface of the detection tube 2;

[0041] A ring groove is opened on the outer surface of the detection tube 2, and an air intake sleeve 6 is fixed in the ring groove. There is a gap between the inner surface of the air intake sleeve 6 and the bottom of the ring groove, and the outer surface of the air intake sleeve 6 is flush with the detection tube 2;

[0042] A position adjustment assembly, which can at least drive the detection tube 2 to move axially so as to adjust the relative position of the detection head 4 according to the impact force of the detected gas.

[0043] A sealing sleeve 5 is further provided at one end of the detection tube 2 away from the air intake sleeve 6.

[0044] For example, when the impact force of the detected gas is greater than the threshold value, the detection head 4 is adjusted to be hidden inside the protection cylinder 1, and at this time, the air intake sleeve 6 partially extends out of the protection cylinder 1; when the impact force of the detected gas is less than the threshold value, the detection head 4 is adjusted to extend out of the protection cylinder 1.

[0045] Such as Figure 1, when the impact force of the detected gas is less than the threshold value, the position adjustment component adjusts the detection head 4 to extend out of the protection cylinder 1. The detection head 4 is in direct contact with the downhole gas, and can collect gas samples at different positions and in different directions in the downhole more extensively. Due to the absence of the shielding of the protection cylinder 1, the detection head 4 can fully sense the changes in parameters such as gas composition and concentration in the surrounding environment, so as to achieve more comprehensive and accurate sampling detection, and provide rich and reliable data for subsequent gas field exploration and analysis.

[0046] As Figure 2 , when the impact force of the downhole gas exceeds the set threshold value, the position adjustment component responds quickly and drives the detection tube 2 to retract axially. The detection tube 2 moves inward along the axis of the protection cylinder 1, driving the detection head 4 to be completely hidden inside the protection cylinder 1. The protection cylinder 1 plays an important protective role at this time, avoiding damage to the detection head 4 due to excessive impact force and ensuring the safety of the detection head 4.

[0047] At the same time, the intake sleeve 6 extends out of the protection cylinder 1 halfway. There is a gap between the inner surface of the intake sleeve 6 and the bottom of the annular groove on the detection tube 2, and this gap forms a tortuous gas path. Part of the gas can enter the inside of the protection cylinder 1 through the tortuous gas path, so that the detection head 4 can still detect the gas while being protected, ensuring that the gas detection work can continue under harsh gas flow impact conditions.

[0048] Specifically, a wind sensor can be provided on the protection cylinder 1.

[0049] Furthermore, an exhaust device 11 is embedded in the protection cylinder 1, and the exhaust device 11 is used to provide gas guidance for the detection head 4 when the detection head 4 is hidden inside the protection cylinder 1.

[0050] While exhausting the gas, the exhaust device 11 can guide the movement of the gas, orderly guiding the gas entering the inside of the protection cylinder 1 to the area where the detection head 4 is located, so that the detection head 4 can contact a relatively stable and uniform gas flow, thereby continuously and accurately detecting parameters such as gas composition and concentration.

[0051] The exhaust device 11 is any one of a fan and a gas pump.

[0052] In this embodiment, when the detection head 4 is hidden inside the protection cylinder 1, the detection head 4 is arranged facing the exhaust device 11, and the projection of the detection head 4 facing the exhaust device 11 covers the central axis of the exhaust device 11.

[0053] The design that the detection head 4 faces the exhaust device 11 and its projection covers the central axis enables the gas guided by the exhaust device 11 to fully pass through the detection head 4. When the gas passes through the detection head 4, it can fully contact with each detection part of the detection head 4, ensuring that the detection head 4 can accurately sense various parameters of the gas, greatly improving the accuracy of gas detection, reducing the detection error caused by insufficient gas contact, and providing a strong guarantee for the safe and efficient conduct of gas field exploration.

[0054] Further, the exhaust device 11 is arranged near the end of the protective cylinder 1.

[0055] That is to say, the exhaust device 11 is arranged near the end of the protective cylinder 1, so that after the gas enters the protective cylinder 1, a buffer gas turbulence is formed near the end. The gas in the turbulent state contacts the detection head 4 more fully and frequently, enabling the detection head 4 to more sensitively sense the minute changes in the gas composition and concentration.

[0056] In this embodiment, a spiral groove 7 is provided on the outer surface of the detection tube 2;

[0057] The position adjustment assembly includes:

[0058] A driving wheel 8, which is fixed on the inner wall of the protective cylinder 1 and is used to drive the detection tube 2 to rotate self - sufficiently;

[0059] A nut seat 9, which is fixed on the inner wall of the protective cylinder 1 and is matched with the spiral groove 7 of the detection tube 2. A through - shaped guiding hole 10 is provided on the nut seat 9.

[0060] When the driving wheel 8 starts, it will drive the detection tube 2 to rotate self - sufficiently. The spiral groove 7 on the outer surface of the detection tube 2 cooperates with the nut seat 9 fixed on the inner wall of the protective cylinder 1 to form a structure similar to a bolt and nut, pushing the detection tube 2 to move axially and outward along the protective cylinder 1, so that the detection head 4 is completely exposed outside the protective cylinder 1 and directly contacts the downhole gas for comprehensive sampling and detection.

[0061] When the gas impact force exceeds the threshold value, the driving wheel 8 rotates in the reverse direction, driving the detection tube 2 to rotate in the reverse direction. The detection tube 2 moves axially and inward under the cooperation of the spiral groove 7 and the nut seat 9, and the detection head 4 hides into the interior of the protective cylinder 1. At this time, the guiding hole 10 further plays the function of guiding gas. It orderly guides the gas introduced by the intake sleeve 6 to the area where the detection head 4 is located, enabling the gas to fully contact the detection head 4 and ensuring that the detection head 4 can accurately detect parameters such as the composition and concentration of the gas.

[0062] Further, a sealing plate 12 corresponding to the guiding hole 10 is fixed on the outer surface of the detection tube 2. A sealing disk 13 corresponding to the guiding hole 10 is fixed on the sealing plate 12, and a pressure sensor 14 is also embedded in the sealing plate 12.

[0063] As Figure 3

[0064]

[0065]

[0066] In this embodiment, the air inlet sleeve 6 is of a filter structure, and a plurality of support members are installed between the inner surface of the air inlet sleeve 6 and the bottom of the annular groove for supporting the air inlet sleeve 6.

[0067] When the gas impact force exceeds the threshold value, the driving wheel 8 rotates in the reverse direction, the detection tube 2 retracts, and the air inlet sleeve 6 partially extends out of the protection cylinder 1. At this time, the filter structure of the air inlet sleeve 6 is exposed to the downhole gas environment, and the air inlet sleeve 6 filters the gas to remove particulate impurities and some droplets in the gas, etc. The support members continuously provide support for the air inlet sleeve 6 to ensure that the air inlet sleeve 6 will not be damaged or deformed when withstanding the airflow impact and filtering the gas, and ensure that the gas can stably enter the interior of the protection cylinder 1 through the air inlet sleeve 6.

[0068] In this embodiment, a dust scraping assembly 15 corresponding to the air inlet sleeve 6 is further provided outside the protection cylinder 1. The dust scraping assembly 15 includes:

[0069] A scraping seat 151 fixed to the outer wall of one end of the protection cylinder 1, and a limiting plate 152 is fixed in the scraping seat 151;

[0070] Two symmetrically arranged scraping plates 153, and the scraping plates 153 are limited and slidably arranged on the limiting plate 152;

[0071] An elastic member 154 connected between the scraping seat 151 and the scraping plate 153;

[0072] Among them, the two scraping plates 153 form a horn shape.

[0072] The two scraping plates 153 of the dust scraping assembly 15 form a horn shape. This design increases the contact area between the scraping plate 153 and the intake sleeve 6, enabling better coverage of the outer surface of the intake sleeve 6. During the process of the intake sleeve 6 rotating out and rotating back, the scraping plate can effectively scrape off dust, impurities, etc. on the surface of the intake sleeve 6, and the dust removal effect is remarkable. At the same time, the setting of the elastic member 154 ensures that the scraping plate 153 is always in close contact with the intake sleeve 6. Even when the surface of the intake sleeve 6 is uneven or the impurity distribution is uneven, efficient dust removal can be achieved.

[0073] Further, the elastic member 154 includes two symmetrically arranged elastic seats 1541. A spring 1543 is connected between the two elastic seats 1541, and an electromagnetic adjusting member 1542 is embedded in each elastic seat 1541.

[0074] Through the combined design of the electromagnetic adjusting member 1542 and the spring 1543, the elastic member 154 can achieve precise control of the elastic force. The electromagnetic adjusting member 1542 can adjust the magnitude of the elastic force of the elastic member 154 in real time according to the actual working condition requirements, so that the scraping plate 153 can always contact the surface of the intake sleeve 6 with an appropriate force, which not only ensures the dust scraping effect but also avoids excessive wear of the scraping plate 153 and the intake sleeve 6 caused by excessive elastic force, and extends the service life of the scraping plate 153 and the intake sleeve 6.

[0075] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered within the protection scope of the present invention.

Claims

1. A gas detection device for drilling wells in gas field exploration, characterized in that, Comprising: A protection cylinder (1) with both ends of the opening contracting inward to form mounting holes; A detection tube (2) passing through the protection cylinder (1) and slidably connected to the mounting holes; A detector (3) built into the detection tube (2), and the detector (3) has a plurality of detection heads (4) which are fitted to the outer surface of the detection tube (2); A ring groove is formed on the outer surface of the detection tube (2), and an air intake sleeve (6) is fixed in the ring groove. There is a gap between the inner surface of the air intake sleeve (6) and the bottom of the ring groove, and the outer surface of the air intake sleeve (6) is flush with the detection tube (2); A position adjustment assembly capable of at least driving the detection tube (2) to move axially to adjust the relative position of the detection head (4) according to the impact force of the detected gas.

2. The gas detection device for drilling wells in gas field exploration according to claim 1, characterized in that, When the impact force of the detected gas is greater than the threshold, the detection head (4) is adjusted to be hidden inside the protection cylinder (1), and at this time, the air intake sleeve (6) partially extends out of the protection cylinder (1); when the impact force of the detected gas is less than the threshold, the detection head (4) is adjusted to extend out of the protection cylinder (1).

3. The gas detection device for drilling wells in gas field exploration according to claim 1, characterized in that, An exhaust device (11) is also embedded in the protection cylinder (1), and the exhaust device (11) is used to provide gas guidance for the detection head (4) when the detection head (4) is hidden inside the protection cylinder (1).

4. The gas detection device for drilling wells used in gas field exploration according to claim 3, characterized in that, When the detection head (4) is hidden inside the protection cylinder (1), the detection head (4) is arranged towards the exhaust device (11), and the projection of the detection head (4) towards the exhaust device (11) covers the central axis of the exhaust device (11).

5. The gas detection device for drilling wells used in gas field exploration according to claim 3, wherein, The exhaust device (11) is arranged close to the end of the protection cylinder (1).

6. The gas detection device for drilling wells in gas field exploration according to claim 1, characterized in that, A spiral groove (7) is formed on the outer surface of the detection tube (2); The position adjustment assembly includes: A driving wheel (8) fixed to the inner wall of the protection cylinder (1) for driving the detection tube (2) to rotate; A nut seat (9) fixed to the inner wall of the protection cylinder (1) and cooperating with the spiral groove (7) of the detection tube (2). A through guide hole (10) is formed on the nut seat (9).

7. The gas detection device for drilling wells in gas field exploration according to claim 6, characterized in that, A sealing plate (12) corresponding to the guide hole (10) is fixed on the outer surface of the detection tube (2), and a sealing disc (13) corresponding to the guide hole (10) is fixed on the sealing plate (12). A pressure sensor (14) is also embedded in the sealing plate (12).

8. The gas detection device for drilling wells used in gas field exploration according to claim 1, wherein, The air intake sleeve (6) is a filter structure, and a plurality of support members are installed between the inner surface of the air intake sleeve (6) and the bottom of the ring groove to support the air intake sleeve (6).

9. The gas detection device for drilling wells in gas field exploration according to claim 8, characterized in that, A dust scraping assembly (15) corresponding to the air intake sleeve (6) is also arranged outside the protection cylinder (1), and the dust scraping assembly (15) includes: A scraping seat (151) fixed to the outer wall of one end of the protection cylinder (1), and a limiting plate (152) is fixed in the scraping seat (151); Two symmetrically arranged scraping plates (153) are slidably arranged on the limiting plate (152) in a limited manner; An elastic member (154) is connected between the scraping base (151) and the scraping blade (153); Wherein, the two scraping blades (153) form a flared shape.

10. A gas detection device for drilling wells in gas field exploration according to claim 9, characterized in that, The elastic member (154) includes two symmetrically arranged elastic seats (1541), a spring (1543) is connected between the two elastic seats (1541), and an electromagnetic adjusting member (1542) is embedded in each elastic seat (1541).

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