Automatic measuring device for water yield of coal-bed gas well

Abstract

The utility model provides an automatic measuring device for water yield of a coal-bed gas well, which belongs to the technical field of coal-bed gas drainage and mining and comprises a support, a water pan, a counting transmission shaft, a rotary transmission shaft, a counter, a rotary motor and a controller. The support is provided with a shaft mounting hole used for being connected with a water production shaft. The water pan is located below the shaft mounting hole and rotationally connected with the support through the counting transmission shaft and the rotating transmission shaft. The counting transmission shaft and the rotating transmission shaft are located on the two sides of the water pan and arranged in parallel. The counter is fixed on the bracket; the input shaft is connected with the counting transmission shaft; the rotary motor is fixed on the bracket; an output shaft is connected with the rotary transmission shaft; the controller is connected with the rotary motor and used for controlling the rotary motor to rotate when water in the water pan reaches a preset value. The coal-bed gas well water yield monitoring system realizes long-term monitoring of the coal-bed gas well water yield, and is more suitable for long-term monitoring of low-water-yield wells and even drip wells.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of coal bed gas drainage, and specifically discloses a coal bed gas well water production automatic measuring device. BACKGROUND

[0002] The water production of a coal bed gas well is usually closely related to the gas production. Studying the water production of a coal bed gas well in combination with mine geological conditions can be used to propose an optimal drainage scheme suitable for the coal bed gas well, so that the drainage benefit of the coal bed gas well is maximized, and accurate measurement of the water production has very important significance for efficient and economic drainage of the coal bed gas.

[0003] A commonly used measurement mode is that a well inspection staff member uses a 1L measuring cylinder to calculate daily water production, monthly water production and even annual water production by means of the time for filling the measuring cylinder with water. This measurement mode usually has the following non-ignorable disadvantages:

[0004] 1. The coal bed gas well does not produce water uniformly, and the data of the well inspection staff member in different measurement time periods will often calculate different results, resulting in a large error, and long-term measurement in multiple time periods increases the work intensity of the well inspection staff member;

[0005] 2. For some low water production or even no water wells, the condition of filling a measuring cylinder is not met, and the water production is often recorded as no water or dripping water, which greatly influences the production analysis of the coal bed gas well. CONTENT OF THE UTILITY MODEL

[0006] The utility model provides a coal bed gas well water production automatic measuring device, and at least solves the above-mentioned technical problem.

[0007] The coal bed gas well water production automatic measuring device, including support, water receiving tray, counting transmission shaft, rotary transmission shaft, counter, rotary motor and controller, the well hole mounting hole for being connected with water production well hole is provided on the support, the water receiving tray is located below the well hole mounting hole, and is rotatably connected with the support through the counting transmission shaft and the rotary transmission shaft, the counting transmission shaft and the rotary transmission shaft are located at both sides of the water receiving tray, and are parallelly arranged, the counter is fixed on the support, and the input shaft is connected with the counting transmission shaft, the rotary motor is fixed on the support, and the output shaft is connected with the rotary transmission shaft, the controller is connected with the rotary motor, and is used to control the rotary motor to rotate when the water in the water receiving tray reaches the preset value.

[0008] In the coal bed gas well water production automatic measuring device, a water level sensor is installed in the water receiving tray; the water level sensor is used to measure the water level of the water in the water receiving tray and is connected with the controller.

[0009] In the coal bed gas well water production automatic measuring device, a weight sensor is installed in the water receiving tray; the weight sensor is used to measure the weight of the water in the water receiving tray and is connected with the controller.

[0010] The rotating motor is a one-way rotating motor; the coal bed gas well water production automatic measuring device further comprises a reset torsion spring; the reset torsion spring is sleeved on the rotating transmission shaft, and two ends thereof are connected with the water receiving disc and the support respectively.

[0011] The coal bed gas well water production automatic measuring device further comprises a solar cell panel; the controller and the solar cell panel are fixed on the support; the counter, the rotating motor and the controller are powered by the solar cell panel.

[0012] The support comprises a support I and a support II; the support I is provided with a semicircular groove I; the support II is provided with a semicircular groove II; the support II is connected with the support I through bolts, and the semicircular groove II and the semicircular groove I enclose the wellbore mounting hole.

[0013] The water receiving disc is an inverted trapezoidal structure with a smooth aluminum inner wall, and the inner wall is provided with water level scale lines.

[0014] Compared with the prior art, the coal bed gas well water production automatic measuring device has the following beneficial effects:

[0015] 1. The coal bed gas well water production automatic measuring device improves the traditional coal bed gas well water production measurement mode, realizes long-term monitoring of the coal bed gas well water production, reduces the working intensity of the well inspection personnel, is simple and easy to operate, has no technical requirements for the operator, and is easy to popularize and generalize.

[0016] 2. Especially for the coal bed gas well with low water production or even dripping water, the coal bed gas well water production automatic measuring device can accurately and effectively monitor the water production of the coal bed gas well, is more suitable for long-term monitoring of the low water production well or even the dripping well, can better find whether the low water production well or the dripping well has periodic water production, and provides basic data for coal bed gas well data analysis.

[0017] 3. The coal bed gas well water production automatic measuring device adopts the solar cell panel, and does not need to be connected with a power supply. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 It is a front view of the coal bed gas well water production automatic measuring device;

[0020] Figure 2 It is an axial side view of the coal bed gas well water production automatic measuring device;

[0021] Figure 3 It is a left view of the automatic measuring device for water production of coal bed gas well;

[0022] Figure 4 It is a top view of the automatic measuring device for water production of coal bed gas well.

[0023] In the figure: 1- support I; 2- support II; 3- water receiving tray; 4- counting transmission shaft; 5- rotating transmission shaft; 6- counter; 7- rotating motor; 8- controller; 9- reset torsional spring; 10- solar panel; 100- water production wellbore. DETAILED DESCRIPTION

[0024] The technical scheme of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0025] The present embodiment provides an automatic measuring device for water production of coal bed gas well, which comprises a support, a water receiving tray 3, a counting transmission shaft 4, a rotating transmission shaft 5, a counter 6, a rotating motor 7 and a controller 8. The support is provided with a wellbore mounting hole for connecting with a water production wellbore 100. The water receiving tray 3 is located below the wellbore mounting hole and is rotatably connected with the support through the counting transmission shaft 4 and the rotating transmission shaft 5. The counting transmission shaft 4 and the rotating transmission shaft 5 are located on both sides of the water receiving tray 3 and are arranged in parallel. The counter 6 is fixed on the support, the input shaft is connected with the counting transmission shaft 4, and the counter 6 is provided with a power-on button, a reset button, a data review button and a display screen. The rotating motor 7 is fixed on the support, and the output shaft is connected with the rotating transmission shaft 5. The controller 8 is connected with the rotating motor 7 and is used for controlling the rotating motor 7 to rotate when the water in the water receiving tray 3 reaches a preset value, so as to pour out the water in the water receiving tray 3, and the counter 6 counts once.

[0026] The support comprises a support I 1 and a support II 2. The support I 1 is provided with a semicircular groove I. The support II 2 is in the form of a coupling structure and is provided with a semicircular groove II. The support II 2 is connected with the support I 1 through bolts, and the semicircular groove II and the semicircular groove I enclose the wellbore mounting hole.

[0027] The measurement of the water in the water receiving tray 3 can adopt a water level sensor or a weight sensor. The water level sensor is used for measuring the water level of the water in the water receiving tray 3, and the weight sensor is used for measuring the weight of the water in the water receiving tray 3.

[0028] The water receiving tray 3 is in the form of an inverted trapezoidal structure with smooth inner wall made of aluminum. The inner wall is provided with water level graduation lines, and there is also a highest water level line. The maximum water holding capacity without overturning is 300 ml.

[0029] Compared with the bidirectional rotating motor, the purchase and subsequent maintenance cost of the unidirectional rotating motor is lower, and therefore, in the embodiment, the rotating motor 7 is a unidirectional rotating motor; in order to realize the resetting of the water receiving tray 3, a resetting torsion spring 9 is installed outside the rotating transmission shaft 5; the two ends of the resetting torsion spring 9 are connected with the water receiving tray 3 and the support respectively.

[0030] The coal bed gas well water production automatic measuring device further comprises a solar panel 10; the controller 8 and the solar panel 10 are both fixed on the support; the counter 6, the rotating motor 7 and the controller 8 are all powered by the solar panel 10. In the embodiment, the solar panel 10 adopts a micro solar panel.

[0031] The functions and roles of each part of the coal bed gas well water production automatic measuring device are introduced as follows.

[0032] 1) Water production wellbore 100: the coal bed gas well promotes desorption by drainage pressure reduction to facilitate the exploitation and utilization of gas in the coal bed, the coal bed gas well water is discharged to the ground through a tee on the wellhead flange via the oil pipe, and the coal bed gas well water outlet is the water production wellbore 100 in the embodiment.

[0033] 2) Water receiving tray 3: it is the main working part of the device, has scales and a highest water level line, and is mainly used to receive the coal bed gas well water for measurement. Since it is mainly aimed at low-yield wells and almost no water wells, in order to ensure the accuracy of data and reduce the weight and energy consumption of the device, the maximum water receiving capacity of the water receiving tray 3 is 300 ml.

[0034] 3) Controller 8: used for controlling the operation of the whole device.

[0035] 4) Counter 6: when the water receiving tray 3 is emptied once, the counter 6 counts once. The counter 6 can review the last 5 data.

[0036] 5) Solar panel 10: provides the operation power for the whole device.

[0037] In use, the device is fixed below the coal bed gas well water outlet by the support, and the wellhead water is directly dripped into the water receiving tray 3 below. When the water in the water receiving tray 3 reaches the full line, the controller 8 controls the rotating motor 7 to empty all the water, and at the same time, the counter 6 counts the number of times of emptying, and then the resetting torsion spring 9 resets the empty water receiving tray 3 to continue receiving the wellbore water; if the water receiving tray 3 below is not full, the water production can be directly read through the internal scales of the water receiving tray 3. The solar panel 10 provides power for the whole device.

[0038] Further, the well inspection staff can calculate the daily water production, monthly water production and even annual water production of the well by using the formula V = (300C + H) / T according to the counter reading C, the scale H corresponding to the water stored in the water receiving tray 3 and the working time T of the device this time.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A coal bed methane well water production automatic measuring device, characterized in that, The device comprises a support, a water pan, a counting transmission shaft, a rotating transmission shaft, a counter, a rotating motor and a controller. The support is provided with a wellbore mounting hole for connecting with a water production wellbore. The water pan is located below the wellbore mounting hole and is rotationally connected with the support through the counting transmission shaft and the rotating transmission shaft. The counting transmission shaft and the rotating transmission shaft are located on both sides of the water pan and are arranged in parallel. The counter is fixed on the support and an input shaft is connected with the counting transmission shaft. The rotating motor is fixed on the support and an output shaft is connected with the rotating transmission shaft. The controller is connected with the rotating motor and is used for controlling the rotating motor to rotate when the water in the water pan reaches a preset value.

2. The coal bed gas well water production automatic measuring device according to claim 1, characterized in that, A water level sensor is installed in the water pan. The water level sensor is used for measuring the water level of the water in the water pan and is connected with the controller.

3. The coal bed gas well water production automatic measuring device according to claim 1, characterized in that, A weight sensor is installed in the water pan. The weight sensor is used for measuring the weight of the water in the water pan and is connected with the controller.

4. The coal bed gas well water production automatic measuring device according to claim 1, characterized by, The rotating motor is a one-way rotating motor. The device further comprises a reset torsion spring. The reset torsion spring is sleeved on the rotating transmission shaft and is connected with the water pan and the support at two ends.

5. The coal bed gas well water production automatic measuring device according to claim 1, characterized in that, The device further comprises a solar panel. The controller and the solar panel are fixed on the support. The counter, the rotating motor and the controller are powered by the solar panel.

6. The coal bed gas well water production automatic measuring device according to claim 1, characterized in that, The support comprises a support I and a support II. The support I is provided with a semicircular groove I. The support II is provided with a semicircular groove II. The support II is connected with the support I through bolts, and the semicircular groove II and the semicircular groove I enclose the wellbore mounting hole.

7. The coal bed gas well water production automatic measuring device according to claim 1, characterized by, The water pan is an aluminum inverted trapezoidal structure with smooth inner wall, and the inner wall is provided with water level scale lines.

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