Wellhead defrosting device for gas recovery well

Abstract

The utility model provides a gas recovery well mouth defrosting device, which belongs to the technical field of energy exploitation, and comprises a well mouth seat, an electric heating tube is embedded in the outer wall of the well mouth seat, the well mouth seat is heated through the electric heating tube, so that the installed well mouth is heated, the inner wall of the well mouth seat is provided with a drainage assembly used for guiding condensate water, and the drainage assembly is provided with a water inlet and a water outlet. The drainage hole corresponds to the water flow tail end of the drainage assembly, condensate water is drained to the outside through the drainage hole, the condensate water is prevented from corroding and damaging the surface of the gas production pipeline, and therefore the gas production pipeline is protected, and frost is formed on the inner wall of the wellhead seat when the gas production wellhead absorbs heat due to pressure reduction, so that the gas production pipeline is protected. The wellhead seat is heated through the electric heating pipe, so that the formed frost is treated, the frost forms condensed water, then the condensed water is discharged to the outside, and the influence of the frost formed at the wellhead on the gas production process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of energy mining, in particular to a defrosting device at the wellhead of a gas production well. Background Art

[0002] Like crude oil, natural gas is also buried in closed geological structures underground. Some are stored in the same layer as crude oil, and some exist separately. For natural gas stored in the same layer as crude oil, it will be mined together with crude oil. Natural gas will absorb heat at the wellhead due to the reduction of pressure, resulting in frost at the wellhead. Therefore, frost treatment is required at the wellhead of natural gas.

[0003] The related technology (publication number: CN214303781U) discloses a natural gas wellhead collection compressor device, and the disclosed technical solution is: an isolation and protection device is composed of a first connecting plate, a top plate, a second connecting plate and a support plate that can be movably assembled to effectively isolate the device from the erosion of external rainwater, extend the service life of the device, improve economic benefits, and increase safety. The movably detachable protection device is convenient for staff to maintain the equipment, and the first connecting plate, the top plate, the second connecting plate and the support plate can also be conveniently transported.

[0004] In the above disclosed technical solutions, the following problems were found in the related technologies: when frost forms at the natural gas wellhead due to pressure changes, it will affect the natural gas extraction, and external rainwater will also affect the gas pipeline at the wellhead. Therefore, it is necessary to remove the frost, and at the same time, it is necessary to avoid condensation and frost. In this regard, we have proposed a new type of gas wellhead defrosting device.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background technology section of this application, and therefore may include prior art information that does not constitute known to ordinary technicians in the field. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology. In order to solve the problem of frost on the wellhead existing in the above-mentioned prior art, the utility model provides a wellhead defrosting device for a gas production well, which adopts a wellhead defrosting component combined with a condensate discharge component to achieve the effect of ensuring the production quality. The specific technical solution is:

[0007] A defrosting device for a gas wellhead comprises a wellhead seat, an outer wall of which is embedded with an electric heating tube, an inner wall of which is provided with a drainage assembly for diverting condensed water, and the inner wall of which is provided with drainage holes circumferentially arranged in sequence, wherein the drainage holes correspond to the water flow ends of the drainage assembly.

[0008] In the above technical solution, the drainage assembly includes a guide member spirally arranged on the inner wall of the wellhead seat, a guide ring seat for condensate discharge is arranged at the bottom of the inner cavity of the wellhead seat, and the guide ring seat is connected to the water flow end of the guide member.

[0009] A plugging piece is embedded in the inner cavity of the drainage hole, and an extrusion driving component for removing the plugging piece is penetrated through the outer wall of the guide ring seat.

[0010] The extrusion drive assembly includes a push rod that passes through the inner cavity of the guide ring seat, and the end of the push rod extending out of the inner wall of the guide ring seat is fixedly installed with an extrusion block, and the other end of the push rod extends to the inner cavity of the drainage hole and is fixedly connected to the blocking member.

[0011] The inner wall of the guide ring seat is provided with a groove for accommodating the extrusion block, and the groove is communicated with the through hole of the push rod.

[0012] An elastic member is arranged between the inner wall of the groove and the extrusion block, and the elastic member is sleeved on the outside of the push rod.

[0013] An annular seat is sleeved on the top of the outer wall of the wellhead seat, and a solar cell panel is arranged in the inner cavity of the annular seat.

[0014] A mounting seat for fixing the wellhead seat is arranged at the bottom of the outer wall of the annular seat, and a mounting hole is arranged in the inner cavity of the mounting seat.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the gas wellhead defrosting device:

[0016] 1. The condensed water enters the water storage cavity formed by the inner wall of the guide ring seat and the wellhead seat, and then is discharged to the outside through the drainage hole, so as to prevent the condensed water from causing corrosion damage to the surface of the gas pipeline, thereby protecting the gas pipeline.

[0017] 2. When the gas wellhead absorbs heat due to pressure reduction, frost forms on the inner wall of the wellhead seat. The wellhead seat is heated by an electric heating pipe to treat the formed frost, so that the frost turns into condensed water, which is then discharged to the outside, thereby preventing the frost formed at the wellhead from affecting the gas production process.

[0018] 3. By means of the spiral guide piece attached to the outer wall of the gas production pipeline, the condensed water formed on the inner wall of the wellhead seat flows through the guide piece to the outer wall inclined surface of the guide ring seat in sequence, so that the condensed water enters the water storage cavity, ensuring the smoothness of the condensed water discharge process, thereby preventing the condensed water from being retained inside the wellhead seat.

[0019] Fourth, when the gas production pipeline moves to the bottom of the wellhead seat, the outer wall of the gas production pipeline applies force to the extrusion drive assembly, so that the extrusion drive assembly discharges the plugging member from the drainage hole to the outside, thereby preventing water accumulation inside the wellhead seat.

[0020] Fifth, the elastic force of the elastic member ensures the stability of the position of the extrusion block, thereby preventing the position of the extrusion block from shifting during the installation of the wellhead seat, thereby ensuring the stability of the relative position of the gas production pipeline and the extrusion block. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a gas wellhead defrosting device of the utility model;

[0022] Figure 2 It is a structural explosion diagram of a gas wellhead defrosting device of the utility model;

[0023] Figure 3 This is a cross-sectional view of the wellhead seat structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the guide ring seat of the utility model;

[0025] Figure 5 for Figure 3 A local enlarged view of point A;

[0026] Figure 6 for Figure 4 A partial enlarged view of point B;

[0027] in, Figures 1 to 6 The correspondence between the reference numerals and the component names is: 1-wellhead seat, 2-guide member, 3-annular seat, 4-guide ring seat, 5-electric heating pipe, 6-blocking member, 7-mounting seat, 8-push rod, 9-drainage hole, 10-mounting hole, 11-solar cell panel, 13-extrusion block, 14-elastic member, 15-groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The following is a combination of specific implementation cases and attached Figure 1-6 The present invention is further described below, but the present invention is not limited to these embodiments.

[0030] A defrosting device for a gas wellhead includes a wellhead seat 1, and an electric heating tube 5 is embedded inside the outer wall of the wellhead seat 1. An installation cavity is circumferentially opened inside the side wall of the wellhead seat 1, and the groove width of the installation cavity corresponds to the specification of the electric heating tube 5, so that the electric heating tube 5 is circumferentially fixedly embedded inside the wellhead seat 1. The wellhead seat 1 is made of a heat-conducting material. The electric heating tube 5 is electrically connected to an external power source through a wire, and the wellhead seat 1 is heated by the electric heating tube 5, thereby heating the installed wellhead. The electric heating tube 5 is electrically connected to a temperature sensor, and when the temperature sensor detects the frost temperature, the temperature sensor transmits a signal to a controller, so that the controller starts the electric heating tube 5.

[0031] The inner wall of the wellhead seat 1 is provided with a drainage assembly for diverting condensed water, and the inner wall of the wellhead seat 1 is provided with drainage holes 9 in a circumferential direction. Drainage holes 9 are continuously opened in a circle on the inner wall of the wellhead seat 1 and at positions corresponding to the guide ring seat 4. The drainage holes 9 penetrate the outer wall of the wellhead seat 1, so that the water storage cavity formed by the guide ring seat 4 and the inner wall of the wellhead seat 1 is connected to the outside through the drainage holes 9. The drainage holes 9 correspond to the water flow end of the drainage assembly. The drainage assembly guides the condensed water formed on the inner wall of the wellhead seat 1 to the bottom of the inner cavity of the wellhead seat 1, so that the condensed water enters the water storage cavity formed by the guide ring seat 4 and the inner wall of the wellhead seat 1, and then is discharged to the outside through the drainage holes 9. It prevents the condensed water from causing corrosion damage to the surface of the gas production pipeline, thereby protecting the gas production pipeline.

[0032] When the gas wellhead absorbs heat due to pressure reduction, frost is formed on the inner wall of the wellhead seat 1. At this time, the temperature sensor embedded in the inner wall of the wellhead seat 1 transmits a signal to the controller, so that the controller starts the electric heating pipe 5, and heats the wellhead seat 1 through the electric heating pipe 5, thereby processing the formed frost and forming condensed water. The condensation is then discharged to the outside, thereby preventing the frost formed at the wellhead from affecting the gas production process.

[0033] The drainage assembly includes a guide member 2 spirally arranged on the inner wall of the wellhead seat 1, and a guide ring seat 4 for condensed water discharge is arranged at the bottom of the inner cavity of the wellhead seat 1, and the guide ring seat 4 is connected to the water flow end of the guide member 2. The guide member 2 is spirally fixedly embedded in the inner wall of the wellhead seat 1 from top to bottom, and the guide member 2 can be a spiral plate, so that the end of the guide member 2 fits with the top of the guide ring seat 4. The guide ring seat 4 is a hollow annular component, and the guide ring seat 4 is fixedly embedded in the inner cavity of the wellhead seat 1 and is located at the bottom. The circumference of the guide ring seat 4 is set as an inclined surface, and there is a water storage cavity between the inclined surface and the inner wall of the wellhead seat 1.

[0034] By means of the spiral guide piece 2 attached to the outer wall of the gas production pipeline, the condensed water formed on the inner wall of the wellhead seat 1 flows through the guide piece 2 to the outer wall inclined surface of the guide ring seat 4 in sequence, so that the condensed water enters the water storage cavity, thereby ensuring the smoothness of the condensed water discharge process and preventing the condensed water from being retained inside the wellhead seat 1.

[0035] It is worth noting that the inner cavity of the drain hole 9 is embedded with a plugging member 6, and the outer wall of the guide ring seat 4 is penetrated with an extrusion drive assembly for removing the plugging member 6. By embedding the plugging member 6 installed inside the drain hole 9, it is prevented that debris enters the drain hole 9 during the installation of the wellhead seat 1, thereby avoiding clogging of the drain hole 9. After the wellhead seat 1 is fixedly embedded and installed at the gas wellhead, the gas production pipeline is passed through the inner cavity of the wellhead seat 1. When the gas production pipeline moves to the bottom of the wellhead seat 1, the outer wall of the gas production pipeline applies a force to the extrusion drive assembly. The extrusion drive assembly discharges the plugging member 6 from the drain hole 9 to the outside, thereby preventing water from accumulating inside the wellhead seat 1.

[0036] In addition, the extrusion drive assembly includes a push rod 8 that passes through the inner cavity of the guide ring seat 4. The end of the push rod 8 extending out of the inner wall of the guide ring seat 4 is fixedly mounted with an extrusion block 13, and the other end of the push rod 8 extends to the inner cavity of the drain hole 9 and is fixedly connected to the plug 6. The specification of the push rod 8 is smaller than the aperture of the drain hole 9, ensuring that the condensed water can be discharged stably. The push rod 8 slides in the through hole of the guide ring seat 4, and the specification of the plug 6 corresponds to the aperture of the drain hole 9, so that the plug 6 fits on the inner wall of the drain hole 9 and slides. One end of the push rod 8 is vertically fixed to the surface of the plug 6, and the other end of the push rod 8 vertically passes through the guide ring seat 4 and extends from the inner wall to the outside and is fixedly connected to the spherical or hemispherical plug 6.

[0037] When the gas production pipeline is installed inside the wellhead seat 1, when the gas production pipeline slides along the inner wall of the wellhead seat 1 to the position of the extrusion block 13, the outer wall of the gas production pipeline applies a force to the outer wall of the extrusion block 13. The extrusion block 13 drives the push rod 8 to slide in the through hole of the guide ring seat 4, and the end of the push rod 8 located in the inner cavity of the drainage hole 9 drives the blocking member 6 to move out of the wellhead seat 1, so that the drainage hole 9 is connected to the outside. The smoothness of the condensed water discharge process is ensured, thereby preventing the condensed water from accumulating inside the wellhead seat 1.

[0038] In addition, the inner wall of the guide ring seat 4 is provided with a groove 15 for accommodating the extrusion block 13, and the groove 15 is connected with the through hole of the push rod 8. By providing the groove 15 at the inner wall end of the push rod 8 and the through hole of the guide ring seat 4, the extrusion block 13 enters the interior of the groove 15 after being subjected to force. The movable space inside the groove 15 avoids interference with the outer wall of the gas production pipeline.

[0039] Furthermore, an elastic member 14 is provided between the inner wall of the groove 15 and the extrusion block 13, and the elastic member 14 is sleeved on the outside of the push rod 8. The elastic member 14 can be a spring, one end of which is fixedly mounted on the inner wall of the groove 15, and the other end of which is fixed on the surface of the extrusion block 13, and a through hole is provided on the surface of the spring so that the push rod 8 passes through the spring. The elastic force of the elastic member 14 ensures the stability of the position of the extrusion block 13, thereby preventing the position of the extrusion block 13 from shifting during the installation of the wellhead seat 1, thereby ensuring the stability of the relative position between the gas production pipeline and the extrusion block 13.

[0040] An annular seat 3 is sleeved on the top of the outer wall of the wellhead seat 1, and a solar panel 11 is arranged in the inner cavity of the annular seat 3. The annular seat 3 is fixedly sleeved on the outer surface of the wellhead seat 1, and a circumferential accommodating cavity is opened in the inner cavity of the annular seat 3. A plurality of inclined solar panels 11 are fixedly installed in the circumferential direction in the interior of the accommodating cavity, and the solar panels 11 are electrically connected to the photovoltaic inverter, and the electric heating tube 5 is powered by the photovoltaic inverter. The photovoltaic inverter can convert the variable DC voltage generated by the photovoltaic solar panel into an inverter of AC power with a mains frequency, which can be fed back to the commercial power transmission system or used for off-grid power grids. The annular seat 3 is made of colorless and transparent material, and sunlight shines on the solar panel 11 through the transparent annular seat 3, thereby powering the electronic components on the device.

[0041] A mounting seat 7 for fixing the wellhead seat 1 is provided at the bottom of the outer wall of the annular seat 3, and a mounting hole 10 is provided in the inner cavity of the mounting seat 7. A part of the wellhead seat 1 is embedded in the gas well, and the top of the wellhead seat 1 is clamped at the wellhead of the gas well along with multiple mounting seats 7 in the circumferential direction. Then, the bolts are passed through the mounting holes 10 to fix the wellhead seat 1 on the ground, thereby ensuring the stability of the position of the wellhead seat 1.

[0042] The present embodiment is a defrosting device for the wellhead of a gas production well, and its working principle is as follows: first, the top of the wellhead seat 1 is clamped at the wellhead of the gas production well along with multiple circumferential mounting seats 7. Then, the wellhead seat 1 is fixed to the ground after the bolts are passed through the mounting holes 10. When the gas production pipeline slides along the inner wall of the wellhead seat 1 to the position of the extrusion block 13. The outer wall of the gas production pipeline applies a force to the outer wall of the extrusion block 13, so that the extrusion block 13 drives the push rod 8 to slide in the through hole of the guide ring seat 4. The end of the push rod 8 located in the inner cavity of the drainage hole 9 drives the blocking member 6 to move out of the wellhead seat 1, so that the drainage hole 9 is connected to the outside.

[0043] When the gas wellhead absorbs heat due to pressure reduction, frost forms on the inner wall of the wellhead seat 1. At this time, the temperature sensor embedded in the inner wall of the wellhead seat 1 transmits a signal to the controller. The controller starts the electric heating pipe 5, and the wellhead seat 1 is heated by the electric heating pipe 5, so that the frost forms condensed water. The condensed water is then discharged to the outside from the drainage hole 9 through the guide member 2 and the guide ring seat 4.

[0044] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0046] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas wellhead defrosting device, comprising a wellhead seat (1), characterized in that: An electric heating pipe (5) is embedded inside the outer wall of the wellhead seat (1), and a drainage component for diverting condensed water is provided on the inner wall of the wellhead seat (1). Drain holes (9) are sequentially opened circumferentially on the inner wall of the wellhead seat (1), and the drainage holes (9) correspond to the water flow ends of the drainage component.

2. A gas wellhead defrosting device according to claim 1, characterized in that: The drainage assembly comprises a guide member (2) spirally arranged on the inner wall of the wellhead seat (1); a guide ring seat (4) for condensate water discharge is arranged at the bottom of the inner cavity of the wellhead seat (1), and the guide ring seat (4) is connected to the water flow end of the guide member (2).

3. A gas wellhead defrosting device according to claim 2, characterized in that: A blocking member (6) is embedded in the inner cavity of the drainage hole (9), and an extrusion drive component for removing the blocking member (6) is penetrated through the outer wall of the guide ring seat (4).

4. A gas wellhead defrosting device according to claim 3, characterized in that: The extrusion drive assembly comprises a push rod (8) penetrating the inner cavity of the guide ring seat (4); an extrusion block (13) is fixedly mounted on the end of the push rod (8) extending out of the inner wall of the guide ring seat (4); the other end of the push rod (8) extends to the inner cavity of the drainage hole (9) and is fixedly connected to the blocking member (6).

5. A gas wellhead defrosting device according to claim 4, characterized in that: The inner wall of the guide ring seat (4) is provided with a groove (15) for accommodating the extrusion block (13), and the groove (15) is connected to the through hole of the push rod (8).

6. A gas wellhead defrosting device according to claim 5, characterized in that: An elastic member (14) is provided between the inner wall of the groove (15) and the extrusion block (13), and the elastic member (14) is sleeved on the outside of the push rod (8).

7. A gas wellhead defrosting device according to claim 1, characterized in that: An annular seat (3) is sleeved on the top of the outer wall of the wellhead seat (1), and a solar cell panel (11) is arranged in the inner cavity of the annular seat (3).

8. A gas wellhead defrosting device according to claim 7, characterized in that: A mounting seat (7) for fixing the wellhead seat (1) is provided at the bottom of the outer wall of the annular seat (3), and a mounting hole (10) is provided in the inner cavity of the mounting seat (7).

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