Ice-melting and water-removing device for water-gas separator of low-pressure well

Abstract

The utility model discloses an ice-melting and water-removing device of a water-gas separator of a low-pressure well, and belongs to the technical field of ice-melting and water-removing of coal-bed gas well equipment. The ice melting and water removing device can conveniently melt and remove ice in a coal bed gas low-pressure well water-gas separator, and ensures safe operation of a pipeline. According to the technical scheme, a filter screen is vertically installed in the middle of a cavity and divides the cavity into a first cavity and a second cavity, a first water pump is installed in the first cavity, a second water pump is installed in the second cavity, a water drainage pipe and a water suction pipe are both located outside the cavity, and the water inlet end of the water drainage pipe is communicated with a water outlet of the first water pump; the water outlet end of the water suction pipe communicates with the water inlet of the second water pump, the water outlet of the second water pump is connected with one end of a water guide pipe, and the other end of the water guide pipe faces the bottom of the second cavity; the heater is arranged at the bottom in the first cavity, and the thermometer is arranged on the side wall of the first cavity; and a water filling nozzle with a cover is arranged at the top of the cavity. The ice melting and water removing device is used for ice melting and water removing of the low-pressure well water-gas separator.

Description

Technical Field

[0001] The utility model discloses an ice melting and water removal device for a low-pressure well water-gas separator, belonging to the technical field of ice melting and water removal for coalbed methane well equipment. Background Art

[0002] As coalbed methane wells age, the proportion of low-pressure pre-pumping wells gradually increases, and short-range negative pressure extraction is gradually emerging. The water content in the coalbed methane condensate from some individual wells is relatively high, leading to excessive water accumulation in the wellsite water-gas separator and some drainage points in the low-lying U-shaped valleys of the pipelines away from the primary booster station. Liquid carried by the coalbed methane and condensate in the pipelines tend to accumulate here, causing water blockage. When temperatures drop to freezing in winter, some pipelines may freeze, causing blockage and damage, hindering or even blocking gas flow, affecting gas transportation, and shortening the service life of the water-gas separator. Current de-icing devices mainly use ice cones, and de-icing operations are time-consuming and labor-intensive. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of the utility model is to provide an ice melting and water removal device that can conveniently melt and remove ice in the water-gas separator of a coalbed methane low-pressure well to ensure the safe operation of the pipeline.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a low-pressure well water-gas separator ice melting and water removal device, comprising a cavity, a filter screen, a first water pump, a second water pump, a water suction pipe, a drain pipe, a heater, a thermometer and a water injection port;

[0005] The filter screen is vertically installed in the middle of the cavity, dividing the cavity into a first cavity and a second cavity. The first water pump is installed in the first cavity, and the second water pump is installed in the second cavity. The water outlet of the second water pump is connected to one end of the water guide pipe, and the other end of the water guide pipe faces the bottom of the second cavity. The drain pipe and the water suction pipe are both located outside the cavity. The water inlet end of the drain pipe is connected to the water outlet of the first water pump, and the water outlet end of the water suction pipe is connected to the water inlet of the second water pump.

[0006] The heater is arranged at the bottom of the first cavity, a thermometer for measuring the water temperature in the first cavity is arranged on the side wall of the first cavity, and a window for observing the temperature value is opened on the side wall of the first cavity;

[0007] A water inlet with a cover is provided on the top of the cavity.

[0008] Preferably, an overflow port is provided at the upper portion of the side wall of the second cavity, and a sewage outlet is provided at the bottom.

[0009] Preferably, the overflow port is normally open, and the sewage outlet is provided with a sealing cover.

[0010] Preferably, the water outlet end of the drainage pipe and the water inlet end of the suction pipe are connected together by a universal water pipe joint.

[0011] Preferably, the first water pump is a high-temperature resistant self-priming pump, and the second water pump is a negative pressure water pump.

[0012] Preferably, a first ball valve is installed on the drain pipe near the water inlet end, and a second ball valve is installed on the suction pipe near the water outlet end.

[0013] Preferably, the drainage pipe and the water suction pipe are both hoses.

[0014] Preferably, the present invention further comprises a thermostat, which is mounted on the side wall of the first cavity and is connected to the heater.

[0015] Compared with the prior art, the present invention has the following beneficial effects.

[0016] 1. When the condensate water in the water-gas separator pipeline in the coalbed methane low-pressure well freezes due to the temperature dropping to the freezing point in winter, the utility model can conveniently remove the ice, eliminating the problem of pipeline obstruction caused by the freezing of condensate water in winter, and providing a strong guarantee for the smooth operation of the pipeline.

[0017] 2. The utility model is a circulation device, which is simple and easy to carry. It can be assembled according to different freezing conditions of the water discharge pipe of the water-gas separator. It has a wide range of applications and strong adaptability.

[0018] 3. The utility model is convenient and practical, simple and easy to carry. After use, ice can be removed quickly and labor-savingly, which saves ice removal time, simplifies the ice removal process, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of Example 1 of the present utility model.

[0021] Figure 2 This is a structural diagram of the second embodiment of the present utility model.

[0022] Figure 3 This is a connection diagram of the temperature controller in this utility model.

[0023] In the figure: 1 is the cavity, 2 is the filter screen, 3 is the first water pump, 4 is the second water pump, 5 is the drain pipe, 6 is the water suction pipe, 7 is the heater, 8 is the thermometer, 9 is the water inlet, 10 is the first cavity, 11 is the second cavity, 12 is the water guide pipe, 13 is the overflow port, 14 is the sewage outlet, 15 is the universal water pipe joint, 16 is the first ball valve, 17 is the second ball valve, 18 is the thermostat, and 19 is the water discharge pipe of the water-gas separator. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention. It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0026] There are three ways to set up the water-gas separator drain pipe 19 in a coalbed methane pressure well: one is set up above ground, one is buried below ground, and the other is half above ground and half below ground. In all three cases, the present invention can melt ice and remove water. The following different embodiments are provided based on these three cases.

[0027] Example 1

[0028] like Figure 1 As shown, the utility model is a low-pressure well water-gas separator ice melting and water removal device, comprising a cavity 1, a filter screen 2, a first water pump 3, a second water pump 4, a drain pipe 5, a water suction pipe 6, a heater 7, a thermometer 8 and a water injection port 9;

[0029] The filter screen 2 is vertically installed in the middle of the cavity 1, dividing the cavity 1 into a first cavity 10 and a second cavity 11. The first water pump 3 is installed in the first cavity 10, and the second water pump 4 is installed in the second cavity 11. The water outlet of the second water pump 4 is connected to one end of the water guide pipe 12, and the other end of the water guide pipe 12 is toward the bottom of the second cavity 11. The drain pipe 5 and the water suction pipe 6 are both located outside the cavity 1, and the water inlet end of the drain pipe 5 is connected to the water outlet of the first water pump 3, and the water outlet end of the water suction pipe 6 is connected to the water inlet of the second water pump 4;

[0030] The heater 7 is arranged at the bottom of the first cavity 10, and the thermometer 8 for measuring the water temperature in the first cavity 10 is arranged on the side wall of the first cavity 10. A window for observing the temperature value is provided on the side wall of the first cavity 10;

[0031] A water inlet 9 with a cover is provided on the top of the cavity 1 .

[0032] An overflow port 13 is provided at the upper portion of the side wall of the second cavity 11 , and a sewage outlet 14 is provided at the bottom.

[0033] The overflow port 13 is normally open, and the sewage outlet 14 is provided with a sealing cover.

[0034] The water outlet end of the drainage pipe 5 and the water inlet end of the suction pipe 6 are connected together by a universal water pipe joint 15 .

[0035] The first water pump 3 is a high-temperature resistant self-priming pump, and the second water pump 4 is a negative pressure water pump.

[0036] A first ball valve 16 is installed on the drain pipe 5 near the water inlet end, and a second ball valve 17 is installed on the suction pipe 6 near the water outlet end.

[0037] The drainage pipe 5 and the water suction pipe 6 are both hoses.

[0038] like Figure 3 As shown, the present invention further includes a temperature controller 18 , which is mounted on the side wall of the first cavity 10 and is connected to the heater 7 .

[0039] The method of using this embodiment is as follows.

[0040] The first step is to go to the pressure gauge at the wellhead of the pre-pumping well and read the casing pressure value.

[0041] The second step is to slightly open the ball valve of the water-gas separator outlet. If there is no water or gas outflow, the wellhead pressure is less than 0.015MPa and there is no backflow, tap the exposed drain pipe 19 on the ground of the water-gas separator with a wooden stick to determine whether the water in the upper pipe is frozen.

[0042] Step 3: Keep the drain outlet 14, the first ball valve 16 and the second ball valve 17 closed, and tightly wrap the suction pipe 6 (or the drain pipe 5, or the suction pipe 6 and the drain pipe 5 together) around the outside of the water-gas separator drain pipe 19 at the location where ice forms inside.

[0043] Step 4: Open the water inlet 9 and inject hot water into the water until the water level reaches 1 / 2-2 / 3, then close the water inlet 9.

[0044] Step 5. Turn on the first water pump 3, the second water pump 4, the first ball valve 16 and the second ball valve 17 to circulate the hot water in the utility model. Observe the value of the thermometer 8 or the thermostat 18 automatically controls the water temperature. When the water temperature is lower than 50°C, start the heater 7 to heat the water. When the water temperature exceeds 80°C, stop heating the water. Repeat this process until all the ice cubes are melted.

[0045] Step 6. Turn off the first water pump 3, the second water pump 4, the first ball valve 16, the second ball valve 17 and the heater 7, remove the universal water pipe joint 15, separate the drain pipe 5 and the suction pipe 6, extend the suction pipe 6 into the melted water in the water discharge pipe 19 of the water vapor separator, and the drain pipe 5 faces the ground. Turn on the first water pump 3, the second water pump 4, the first ball valve 16 and the second ball valve 17 to drain the water in the water discharge pipe 19 of the water vapor separator.

[0046] Step 7: After the water in the water discharge pipe 19 of the water-gas separator is drained, the first water pump 3 and the second water pump 4 are turned off, and the drain port 14 is opened to drain the water in the cavity 1.

[0047] This embodiment and method of use are aimed at the situation where the water vapor separator drain pipe 19 is located on the ground or the part of the water vapor separator drain pipe 19 located above the ground is frozen. The water suction pipe 6 is tightly wrapped around the water vapor separator drain pipe 19, which can be quickly heated to quickly melt the ice inside. After the ice is completely melted, the utility model can be used to pump out the water in the water vapor separator drain pipe 19, which is convenient and practical.

[0048] Example 2

[0049] like Figure 2 As shown, the structure of the second embodiment is basically the same as that of the first embodiment, except that the water outlet end of the drain pipe 5 and the water inlet end of the suction pipe 6 are free ends and are not connected together.

[0050] The method of using this embodiment is as follows.

[0051] The first step is to go to the pressure gauge at the wellhead of the pre-pumping well and read the casing pressure value.

[0052] The second step is to slightly open the ball valve at the water-gas separator outlet. If there is no water or gas outflow, the wellhead pressure is less than 0.015MPa and there is no backflow, remove the upper elbow of the ball valve at the water-gas separator outlet.

[0053] Step 3: Keep the drain outlet 14, the first ball valve 16 and the second ball valve 17 closed, and insert the drain pipe 5 and the suction pipe 6 into the drain pipe 19 of the frozen water vapor separator. The end of the suction pipe 6 is lower than the end of the drain pipe 5 and higher than the ice surface.

[0054] Step 4: Inject an appropriate amount of hot water from the water inlet 9 until the water level reaches 1 / 2-2 / 3, and then close the water inlet 9.

[0055] Step 5. Turn on the first water pump 3, the second water pump 4, the first ball valve 16 and the second ball valve 17 to circulate the hot water in the utility model, maintain a dynamic balance between the amount of water discharged and the amount of water absorbed, observe the value of the thermometer 8 or automatically control it by the thermostat 18, start the heater 7 to heat when the water temperature is lower than 50°C, and stop heating when it exceeds 80°C, and repeat this process until all the ice cubes are melted.

[0056] Step 6: Pull out the drain pipe 5 and point it toward the ground to drain the water in the water-gas separator drain pipe 19.

[0057] Step 7: After the water in the water discharge pipe 19 of the water-gas separator is drained, the first water pump 3 and the second water pump 4 are turned off, and the drain port 14 is opened to drain the water in the cavity 1.

[0058] This embodiment and method of use are aimed at the situation where the water-gas separator drain pipe 19 is completely buried under the ground, or the frozen part in the water-gas separator drain pipe 19 is located under the ground. The ice is quickly melted by hot water contacting the ice surface. After the ice is completely melted, the water in the water-gas separator drain pipe 19 can be pumped out by the utility model, which is convenient and practical.

[0059] In the case where the water-gas separator drain pipe 19 is half located above the ground and half buried below the ground, and the frozen part is also half located above the ground and half located below the ground, the structure and method in Example 1 can be used first to melt the ice on the ground and drain the water, and then the structure and method in Example 2 can be used to melt the ice below the ground and drain the water.

[0060] Based on the above embodiments and usage methods, the utility model is applicable to the water-gas separator drain pipe 19 in various settings, has strong practicality, a wide range of applications, and is simple and convenient to operate.

[0061] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A low-pressure well water-gas separator ice melting and water removal device, characterized by: It comprises a cavity (1), a filter (2), a first water pump (3), a second water pump (4), a drain pipe (5), a water suction pipe (6), a heater (7), a thermometer (8) and a water inlet (9); The filter screen (2) is vertically installed in the middle of the cavity (1), dividing the cavity (1) into a first cavity (10) and a second cavity (11). The first water pump (3) is installed in the first cavity (10), and the second water pump (4) is installed in the second cavity (11). The water outlet of the second water pump (4) is connected to one end of the water guide pipe (12), and the other end of the water guide pipe (12) faces the bottom of the second cavity (11). The drain pipe (5) and the water suction pipe (6) are both located outside the cavity (1). The water inlet end of the drain pipe (5) is connected to the water outlet of the first water pump (3), and the water outlet end of the water suction pipe (6) is connected to the water inlet of the second water pump (4). The heater (7) is arranged at the bottom of the first cavity (10), a thermometer (8) for measuring the water temperature in the first cavity (10) is arranged on the side wall of the first cavity (10), and a window for observing the temperature value is provided on the side wall of the first cavity (10); A water inlet (9) with a cover is provided on the top of the cavity (1).

2. The low-pressure well water-gas separator ice melting and water removal device according to claim 1, characterized in that: An overflow port (13) is provided at the upper portion of the side wall of the second cavity (11), and a sewage outlet (14) is provided at the bottom.

3. The low-pressure well water-gas separator ice melting and water removal device according to claim 2, characterized in that: The overflow port (13) is normally open, and the sewage outlet (14) is provided with a sealing cover.

4. The low-pressure well water-gas separator ice melting and water removal device according to claim 1 or 2, characterized in that: The water outlet end of the drainage pipe (5) and the water inlet end of the suction pipe (6) are connected together by a universal water pipe joint (15).

5. The low-pressure well water-gas separator ice melting and water removal device according to claim 1 or 2, characterized in that: The first water pump (3) is a high-temperature resistant self-priming pump, and the second water pump (4) is a negative pressure water pump.

6. The low-pressure well water-gas separator ice melting and water removal device according to claim 1 or 2, characterized in that: A first ball valve (16) is installed on the drainage pipe (5) near the water inlet end, and a second ball valve (17) is installed on the suction pipe (6) near the water outlet end.

7. The low-pressure well water-gas separator ice melting and water removal device according to claim 1 or 2, characterized in that: The drainage pipe (5) and the water suction pipe (6) are both hoses.

8. The ice melting and water removal device for a low-pressure well water-gas separator according to claim 1 or 2, characterized in that: The invention also comprises a temperature controller (18), which is installed on the side wall of the first cavity (10) and is connected to the heater (7).

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