Drying device for gas production wellhead and using method

Abstract

The invention discloses a drying device for a gas production wellhead and a using method, and belongs to the technical field of gas production equipment. Produced gas is introduced into a tubing head four-way body through an extension pipe, and meanwhile, low-temperature water is introduced into a cooling pipe, so that the low-temperature water flows around the outer side of the lower end of the tubing head four-way body through the cooling pipe; when the gas flow passes through, water vapor in the gas flow is condensed and gathered on the inner side wall in the lower end of the tubing head four-way body due to the low temperature, then flows downwards under the action of gravity and then flows into the collecting box through the penetrating holes, and the water vapor content in the gas produced gas is reduced; and the sealing cover can be taken down by regularly rotating the sealing cover, so that the water source in the collecting box is discharged without being disassembled, and the treatment is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of gas production equipment, and in particular relates to a drying device for a gas production wellhead and a use method thereof. Background Art

[0002] During the natural gas extraction process, due to the different water content of the gas layers, some gas layers are high-water gas reservoirs. When the gas extraction equipment is in use, part of the gas extracted from the pipeline is dissolved in the water vapor of the produced gas, making the water vapor acidic. When the gas is used for a long time, the acidic liquid corrodes the pipeline inside the pipeline, which reduces the service life of the pipeline and poses a safety hazard. For this situation, dehydration treatment is generally carried out at the gathering and transportation station, but if certain treatment can be carried out at the wellhead, it can also effectively reduce the damage to the pipeline from the wellhead to the gathering and transportation station. For example, the Chinese patent with application number 201621024846.X provides a device for recovering water at the wellhead, but its structure requires a pipeline to be set inside the wellhead, which is easily damaged by high-speed gas erosion. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a drying device for a gas wellhead and a method of use, so as to solve the technical problem of pipeline damage and corrosion during natural gas extraction in the prior art.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A drying device for a gas wellhead comprises a tubing head quad, an oil pipe hanger is arranged at the upper end of the tubing head quad, a cooling pipe is wound around the outer side of the lower end, wing valves are arranged at both left and right ends, a threaded flange is arranged at one end, a pressure gauge is arranged at the other end, a stop valve is fixedly installed at one end of the pressure gauge away from the tubing head quad, a collecting box is connected to the bottom end of the tubing head quad, and a sealing cover of a drain pipe and its end is arranged on the collecting box.

[0006] Preferably, a connecting plate obliquely upward is fixedly provided at the inner side of the lower end of the tubing head quadrilateral, and an extension pipe vertically downward is fixedly connected to the connecting plate. The extension pipe facilitates the passage of produced gas into the inner position of the tubing head quadrilateral, and a plurality of through holes are evenly opened on the outer side of the connecting plate.

[0007] Preferably, a protruding block for dividing the collection box into left and right parts is provided at the center of the bottom of the collection box, and drainage pipes are horizontally inserted on both sides of the collection box to connect the box body with the outside.

[0008] Preferably, at least two rows of flushing ports are provided on the collection box, and the flushing ports are connected to flushing pipes.

[0009] Preferably, the interior of the collecting box is divided into two parts, left and right, by a protruding block, and the height of the side close to the protruding block is higher than the side close to the drainage pipe.

[0010] Preferably, a heating device is provided on the inner side of the upper surface of the protruding block.

[0011] Preferably, the heating device is a circulating water system, a branch pipe is opened on the side of the cooling pipe, and valves are set on the cooling pipe and the branch pipe. The branch pipe is connected to the circulating water system of the heating device, and the outlet of the circulating water system is connected back to the side of the cooling pipe.

[0012] Preferably, sealing rings are fixedly disposed around the connection between the collecting box and the tubing head quad and the extension tube.

[0013] The present invention also discloses a method for using a drying device for a gas wellhead, comprising the following steps:

[0014] The produced gas from the well enters the tubing head quad through the extension pipe;

[0015] The low-temperature water is introduced into the cooling pipe, and the low-temperature water flows around the outer side of the lower end of the tubing head quadrilateral through the cooling pipe;

[0016] The low-temperature water condenses the water vapor inside the airflow, which gathers on the inner wall at the lower end of the tubing head quadrilateral and flows into the collection box under the action of gravity.

[0017] Preferably, during use, the sealing cover is opened periodically to discharge condensed water inside the collection box.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention discloses a drying device for a gas production wellhead, in which produced gas is introduced into the inner position of a tubing head quadrilateral through an extension pipe, and low-temperature water is introduced into the inner position of a cooling pipe at the same time, so that the low-temperature water flows around the outer side of the lower end of the tubing head quadrilateral through the cooling pipe, thereby reducing the temperature inside the lower end of the tubing head quadrilateral, and when the airflow passes through, the low temperature causes the water vapor inside the airflow to condense and gather on the inner side wall of the lower end of the tubing head quadrilateral, and then flows downward under the action of gravity, and then flows into a collection box through perforations, thereby reducing the water vapor content in the produced gas; and the sealing cover can be removed by regularly rotating the sealing cover so that the water source inside the collection box is discharged, and there is no need to disassemble for treatment, which is convenient to handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a drying device for a gas wellhead of the present invention;

[0021] Figure 2 It is a front cross-sectional view of a drying device for a gas wellhead of the present invention;

[0022] Figure 3 The present invention is a top view of a cross-sectional view of a collecting box of a drying device for a gas wellhead.

[0023] Among them: 1-oil pipe head four-way body; 2-oil pipe hanger; 3-pressure gauge; 4-stop valve; 5-wing valve; 6-threaded flange; 7-cooling pipe; 8-collection box; 9-drain pipe; 10-sealing cover; 11-sealing ring; 12-connecting plate; 13-extension pipe; 14-protruding block; 15-perforation; 16-flushing port. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments 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 embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0027] The purpose of the present invention is to provide a drying device for a gas wellhead, so that by improving its structure, it can better condense and dry the water-containing natural gas brought about by high temperature underground, thereby reducing damage and corrosion to subsequent pipelines.

[0028] See also Figure 1A drying device for a gas wellhead comprises a tubing head quadrilateral 1, a tubing hanger 2 is arranged at the upper end of the tubing head quadrilateral 1, a cooling pipe 7 is wound around the outer side of the lower end, wing valves 5 are arranged at both ends, a threaded flange 6 is arranged at one end, a pressure gauge 3 is arranged at the other end, a stop valve 4 is fixedly installed at one end of the pressure gauge 3 away from the tubing head quadrilateral 1, a collecting box 8 is connected to the bottom end of the tubing head quadrilateral 1, a drain pipe 9 and a sealing cover 10 at its end are arranged on the collecting box 8. The produced gas is introduced into the inner position of the tubing head tetrahedron 1, and at the same time, low-temperature water is introduced into the inner position of the cooling tube 7, so that the low-temperature water flows around the outer side of the lower end of the tubing head tetrahedron 1 through the cooling tube 7, thereby reducing the temperature inside the lower end of the tubing head tetrahedron 1. When the airflow passes through, the low temperature causes the water vapor inside the airflow to condense and gather on the inner side wall of the lower end of the tubing head tetrahedron 1, and then flows downward under the action of gravity and flows into the collection box 8, thereby reducing the water vapor content in the produced gas; and the sealing cover 10 can be removed by regularly rotating the sealing cover 10 so that the water source inside the collection box 8 is discharged, and there is no need to disassemble for treatment, which is convenient for treatment.

[0029] Directions:

[0030] The produced gas from the well enters the tubing head quad 1 through the extension pipe 13;

[0031] The low temperature water is passed into the cooling pipe 7, and the low temperature water flows around the outer side of the lower end of the tubing head quadrilateral 1 through the cooling pipe 7;

[0032] The low-temperature water condenses the water vapor inside the airflow, which gathers on the inner wall of the lower end of the tubing head quad 1 and flows into the collection box 8 under the action of gravity.

[0033] In some embodiments, a drying device for a gas wellhead includes a tubing head spool 1, a tubing hanger 2 is fixedly connected to the center of the upper end of the tubing head spool 1, wing valves 5 are fixedly installed on both side ends of the tubing head spool 1, the wing valve 5 is convenient for sharing the internal pressure of the tubing head spool 1, a threaded flange 6 is fixedly installed on the right side end of the wing valve 5 on the right, a pressure gauge 3 is fixedly installed on the left side end of the wing valve 5 on the left, the pressure gauge 3 is convenient for detecting the internal pressure value of the tubing head spool 1, a stop valve 4 is fixedly installed on the left side end of the pressure gauge 3, a cooling pipe 7 is fixedly installed around the outer side of the lower end of the tubing head spool 1, low-temperature water is convenient for passing into the cooling pipe 7, and the low-temperature water is used to reduce the pressure of the tubing head spool The internal temperature of the lower end of the body 1, a collecting box 8 is sleeved at the outer position of the lower end of the tubing head four-way body 1, and a protruding block 14 is integrally formed at the center of the collecting box 8. The protruding block 14 is convenient for separating the collecting box 8 into two left and right blocks. Drain pipes 9 are horizontally inserted and fixedly arranged at both side ends of the collecting box 8, and a sealing cover 10 is fixedly arranged at the outer end of the drainage pipe 9 by threaded connection. The sealing cover 10 is convenient for sealing the drainage pipe 9. A connecting plate 12 is welded and fixedly arranged at the inner position of the lower end of the tubing head four-way body 1, and an extension pipe 13 is welded and fixedly arranged at the center of the connecting plate 12 vertically downward. The extension pipe 13 is convenient for the produced gas to pass into the internal position of the tubing head four-way body 1, and a plurality of through holes 15 are evenly opened on the outside of the connecting plate 12.

[0034] Directions:

[0035] The produced gas from the well is introduced into the inner position of the tubing head quad body 1 through the extension pipe 13, and low-temperature water is introduced into the inner position of the cooling pipe 7, so that the low-temperature water flows around the outer side of the lower end of the tubing head quad body 1 through the cooling pipe 7, thereby reducing the temperature inside the lower end of the tubing head quad body 1;

[0036] When the air flows through, the low temperature causes the water vapor inside the air flow to condense and gather on the inner wall of the lower end of the tubing head quad body 1, and then flows downward under the action of gravity, and then flows into the collection box 8 through the perforation 15;

[0037] The user regularly operates the sealing cover 10 to open it, so that the condensed water inside the collecting box 8 is discharged, which is convenient for handling and has the advantages of simple structure, convenient use and good use effect.

[0038] In some embodiments, at least two rows of flushing ports 16 are provided on the collection box 8, and the flushing ports 16 are connected to flushing pipes.

[0039] In some embodiments, a sealing ring 11 is fixedly disposed around the connection between the collecting box 8 and the tubing head spool 1 , and the sealing ring 11 facilitates sealing the connection between the collecting box 8 and the tubing head spool 1 .

[0040] In some embodiments, the height of the side of the collecting box 8 close to the protruding block 14 is higher than the side close to the drain pipe 9 , so that the collected water source gathers to the side of the drain pipe 9 under the action of gravity.

[0041] In some embodiments, a heating device is provided on the inner side of the upper surface of the protruding block, and a circulating water system is preferably used in the heating device. A branch pipeline is opened on the side of the cooling pipe 7, and valves are set on the cooling pipe 7 and the branch pipeline. The branch pipeline is connected to the circulating water system of the heating device, and the outlet of the circulating water system is connected back to the side of the cooling pipe 7.

[0042] [Example 1]

[0043] See also Figure 2 , 3 The present invention discloses a drying device for a gas wellhead, comprising a tubing head spool 1, a tubing hanger 2 is fixedly connected to the center of the upper end of the tubing head spool 1, wing valves 5 are fixedly installed at both ends of the tubing head spool 1, the wing valves 5 are convenient for distributing the internal pressure of the tubing head spool 1, a threaded flange 6 is fixedly installed at the right end of the right wing valve 5, a pressure gauge 3 is fixedly installed at the left end of the left wing valve 5, the pressure gauge 3 is convenient for detecting the internal pressure value of the tubing head spool 1, and the pressure gauge 3 is fixedly installed at the left end A stop valve 4 is provided, and a cooling pipe 7 is fixed around the outer side of the lower end of the tubing head quad body 1. Low-temperature water is conveniently introduced into the cooling pipe 7. The inlet of the cooling pipe 7 is connected to a cooling water tank (not shown in the figure). Low-temperature water is transported by a pump and circulated. The low-temperature water is used to reduce the internal temperature of the lower end of the tubing head quad body 1. A collecting box 8 is sleeved on the outer side of the lower end of the tubing head quad body 1. A sealing ring 11 is fixed around the connection between the collecting box 8 and the tubing head quad body 1. The sealing ring 11 is convenient for sealing the connection between the collecting box 8 and the tubing head quad body 1. A protruding block 14 is integrally formed at the center of the collecting box 8, and the protruding block 14 is convenient for dividing the collecting box 8 into two parts, and drainage pipes 9 are horizontally inserted and fixed at both ends of the collecting box 8. The height of the side close to the protruding block 14 inside the collecting box 8 is higher than the side close to the drainage pipe 9, so that the collected water source gathers to the side of the drainage pipe 9 under the action of gravity. A sealing cover 10 is fixed to the outer end of the drainage pipe 9 by threaded connection. The sealing cover 10 is a ball valve of an electric switch structure, and its outside can be connected to other pipelines. The sealing cover 10 is convenient for sealing the drain pipe 9. A connecting plate 12 is welded and fixed to the inner side of the lower end of the tubing head quadrilateral 1. The outer end of the connecting plate 12 is tilted downward by 45 degrees. An extension pipe 13 is welded and fixed vertically downward at the center of the connecting plate 12. The extension pipe 13 is convenient for the produced gas to pass into the inner position of the tubing head quadrilateral 1. A sealing ring 11 is fixed at the connection between the extension pipe 13 and the collecting box 8. The sealing ring 11 is convenient for sealing the connection between the collecting box 8 and the extension pipe 13. A plurality of through holes 15 are evenly opened on the outer side of the connecting plate 12.

[0044] Directions:

[0045] The produced gas from the well is introduced into the inner position of the tubing head quad body 1 through the extension pipe 13, and low-temperature water is introduced into the inner position of the cooling pipe 7, so that the low-temperature water flows around the outer side of the lower end of the tubing head quad body 1 through the cooling pipe 7, thereby reducing the temperature inside the lower end of the tubing head quad body 1;

[0046] When the air flows through, the low temperature causes the water vapor inside the air flow to condense and gather on the inner wall of the lower end of the tubing head quad body 1, and then flows downward under the action of gravity, and then flows into the collection box 8 through the perforation 15;

[0047] The user regularly operates the sealing cover 10 to open it, so that the condensed water inside the collecting box 8 is discharged, which is convenient for handling and has the advantages of simple structure, convenient use and good use effect.

[0048] [Example 2]

[0049] See also Figure 2 , 3The present invention discloses a drying device for a gas wellhead, comprising a tubing head spool 1, a tubing hanger 2 is fixedly connected to the center of the upper end of the tubing head spool 1, wing valves 5 are fixedly installed at both ends of the tubing head spool 1, the wing valves 5 are convenient for distributing the internal pressure of the tubing head spool 1, a threaded flange 6 is fixedly installed at the right end of the right wing valve 5, a pressure gauge 3 is fixedly installed at the left end of the left wing valve 5, the pressure gauge 3 is convenient for detecting the internal pressure value of the tubing head spool 1, and the pressure gauge 3 is fixedly installed at the left end A stop valve 4 is provided, and a cooling pipe 7 is fixed around the outer side of the lower end of the tubing head quad body 1. Low-temperature water is conveniently introduced into the cooling pipe 7. The inlet of the cooling pipe 7 is connected to a cooling water tank (not shown in the figure). Low-temperature water is transported by a pump and circulated. The low-temperature water is used to reduce the internal temperature of the lower end of the tubing head quad body 1. A collecting box 8 is sleeved on the outer side of the lower end of the tubing head quad body 1. A sealing ring 11 is fixed around the connection between the collecting box 8 and the tubing head quad body 1. The sealing ring 11 is convenient for sealing the connection between the collecting box 8 and the tubing head quad body 1. A protruding block 14 is integrally formed at the center of the collecting box 8, and the protruding block 14 is convenient for dividing the collecting box 8 into two parts, and drainage pipes 9 are horizontally inserted and fixed at both ends of the collecting box 8. The height of the side close to the protruding block 14 inside the collecting box 8 is higher than the side close to the drainage pipe 9, so that the collected water source gathers to the side of the drainage pipe 9 under the action of gravity. A sealing cover 10 is fixed to the outer end of the drainage pipe 9 by threaded connection. The sealing cover 10 is a ball valve of an electric switch structure, and its outside can be connected to other pipelines. The sealing cover 10 is convenient for sealing the drain pipe 9. A connecting plate 12 is welded and fixed to the inner side of the lower end of the tubing head quadrilateral 1. The outer end of the connecting plate 12 is tilted downward by 45 degrees. An extension pipe 13 is welded and fixed vertically downward at the center of the connecting plate 12. The extension pipe 13 is convenient for the produced gas to pass into the inner position of the tubing head quadrilateral 1. A sealing ring 11 is fixed at the connection between the extension pipe 13 and the collecting box 8. The sealing ring 11 is convenient for sealing the connection between the collecting box 8 and the extension pipe 13. A plurality of through holes 15 are evenly opened on the outer side of the connecting plate 12.

[0050] The collection box is provided with two rows of flushing ports 16, and the flushing ports 16 are connected to a flushing pipe. Each row is provided with 5-10 small ports, and the flushing ports 16 are connected to a unified external flushing pipe, which is used to flush the collection box 8. Because part of the condensed water contains solid phase or crude oil, paraffin, etc., it is easy to cause the drain pipe 9 to be blocked if it is in the collection box 8 for a long time. When necessary, alkaline substances can be added to the flushing water used in the flushing pipe to synthesize the acidic condensed water. The inner surface of the collection box 8 is also provided with an anti-corrosion coating.

[0051] Directions:

[0052] The produced gas from the well is introduced into the inner position of the tubing head quad body 1 through the extension pipe 13, and low-temperature water is introduced into the inner position of the cooling pipe 7, so that the low-temperature water flows around the outer side of the lower end of the tubing head quad body 1 through the cooling pipe 7, thereby reducing the temperature inside the lower end of the tubing head quad body 1;

[0053] When the air flows through, the low temperature causes the water vapor inside the air flow to condense and gather on the inner wall of the lower end of the tubing head quad body 1, and then flows downward under the action of gravity, and then flows into the collection box 8 through the perforation 15;

[0054] The user regularly operates the sealing cover 10 to open it, so that the condensed water inside the collecting box 8 is discharged, which is convenient for handling and has the advantages of simple structure, convenient use and good use effect.

[0055] [Example 3]

[0056] See also Figure 2 , 3The present invention discloses a drying device for a gas wellhead, comprising a tubing head spool 1, a tubing hanger 2 is fixedly connected to the center of the upper end of the tubing head spool 1, wing valves 5 are fixedly installed at both ends of the tubing head spool 1, the wing valves 5 are convenient for distributing the internal pressure of the tubing head spool 1, a threaded flange 6 is fixedly installed at the right end of the right wing valve 5, a pressure gauge 3 is fixedly installed at the left end of the left wing valve 5, the pressure gauge 3 is convenient for detecting the internal pressure value of the tubing head spool 1, and the pressure gauge 3 is fixedly installed at the left end A stop valve 4 is provided, and a cooling pipe 7 is fixed around the outer side of the lower end of the tubing head quad body 1. Low-temperature water is conveniently introduced into the cooling pipe 7. The inlet of the cooling pipe 7 is connected to a cooling water tank (not shown in the figure). Low-temperature water is transported by a pump and circulated. The low-temperature water is used to reduce the internal temperature of the lower end of the tubing head quad body 1. A collecting box 8 is sleeved on the outer side of the lower end of the tubing head quad body 1. A sealing ring 11 is fixed around the connection between the collecting box 8 and the tubing head quad body 1. The sealing ring 11 is convenient for sealing the connection between the collecting box 8 and the tubing head quad body 1. A protruding block 14 is integrally formed at the center of the collecting box 8, and the protruding block 14 is convenient for dividing the collecting box 8 into two parts, and drainage pipes 9 are horizontally inserted and fixed at both ends of the collecting box 8. The height of the side close to the protruding block 14 inside the collecting box 8 is higher than the side close to the drainage pipe 9, so that the collected water source gathers to the side of the drainage pipe 9 under the action of gravity. A sealing cover 10 is fixed to the outer end of the drainage pipe 9 by threaded connection. The sealing cover 10 is a ball valve of an electric switch structure, and its outside can be connected to other pipelines. The sealing cover 10 is convenient for sealing the drain pipe 9. A connecting plate 12 is welded and fixed to the inner side of the lower end of the tubing head quadrilateral 1. The outer end of the connecting plate 12 is tilted downward by 45 degrees. An extension pipe 13 is welded and fixed vertically downward at the center of the connecting plate 12. The extension pipe 13 is convenient for the produced gas to pass into the inner position of the tubing head quadrilateral 1. A sealing ring 11 is fixed at the connection between the extension pipe 13 and the collecting box 8. The sealing ring 11 is convenient for sealing the connection between the collecting box 8 and the extension pipe 13. A plurality of through holes 15 are evenly opened on the outer side of the connecting plate 12.

[0057] The collection box is provided with two rows of flushing ports 16, and the flushing ports 16 are connected to a flushing pipe. Each row is provided with 5-10 small ports, and the flushing ports 16 are connected to a unified external flushing pipe, which is used to flush the collection box 8. Because part of the condensed water contains solid phase or crude oil, paraffin, etc., it is easy to cause the drain pipe 9 to be blocked if it is in the collection box 8 for a long time. When necessary, alkaline substances can be added to the flushing water used in the flushing pipe to synthesize the acidic condensed water. The inner surface of the collection box 8 is also provided with an anti-corrosion coating.

[0058] A valve is provided on the extension tube 13 , and when the water needs to be discharged, the extension tube 13 can be closed to prevent the high-pressure gas from flowing out of the drainage pipe 9 .

[0059] If a connecting pipe is provided at the sealing cover 10 , the connecting pipe is communicated to an external recovery area.

[0060] Directions:

[0061] The produced gas from the well is introduced into the inner position of the tubing head quad body 1 through the extension pipe 13, and low-temperature water is introduced into the inner position of the cooling pipe 7, so that the low-temperature water flows around the outer side of the lower end of the tubing head quad body 1 through the cooling pipe 7, thereby reducing the temperature inside the lower end of the tubing head quad body 1;

[0062] When the air flows through, the low temperature causes the water vapor inside the air flow to condense and gather on the inner wall of the lower end of the tubing head quad body 1, and then flows downward under the action of gravity, and then flows into the collection box 8 through the perforation 15;

[0063] The user regularly operates the sealing cover 10 to open it, so that the condensed water inside the collecting box 8 is discharged, which is convenient for handling and has the advantages of simple structure, convenient use and good use effect.

[0064] [Example 4]

[0065] See also Figure 2 , 3The present invention discloses a drying device for a gas wellhead, comprising a tubing head spool 1, a tubing hanger 2 is fixedly connected to the center of the upper end of the tubing head spool 1, wing valves 5 are fixedly installed at both ends of the tubing head spool 1, the wing valves 5 are convenient for distributing the internal pressure of the tubing head spool 1, a threaded flange 6 is fixedly installed at the right end of the right wing valve 5, a pressure gauge 3 is fixedly installed at the left end of the left wing valve 5, the pressure gauge 3 is convenient for detecting the internal pressure value of the tubing head spool 1, and the pressure gauge 3 is fixedly installed at the left end A stop valve 4 is provided, and a cooling pipe 7 is fixed around the outer side of the lower end of the tubing head quad body 1. Low-temperature water is conveniently introduced into the cooling pipe 7. The inlet of the cooling pipe 7 is connected to a cooling water tank (not shown in the figure). Low-temperature water is transported by a pump and circulated. The low-temperature water is used to reduce the internal temperature of the lower end of the tubing head quad body 1. A collecting box 8 is sleeved on the outer side of the lower end of the tubing head quad body 1. A sealing ring 11 is fixed around the connection between the collecting box 8 and the tubing head quad body 1. The sealing ring 11 is convenient for sealing the connection between the collecting box 8 and the tubing head quad body 1. A protruding block 14 is integrally formed at the center of the collecting box 8, and the protruding block 14 is convenient for dividing the collecting box 8 into two parts, and drainage pipes 9 are horizontally inserted and fixed at both ends of the collecting box 8. The height of the side close to the protruding block 14 inside the collecting box 8 is higher than the side close to the drainage pipe 9, so that the collected water source gathers to the side of the drainage pipe 9 under the action of gravity. A sealing cover 10 is fixed to the outer end of the drainage pipe 9 by threaded connection. The sealing cover 10 is a ball valve of an electric switch structure, and its outside can be connected to other pipelines. The sealing cover 10 is convenient for sealing the drain pipe 9. A connecting plate 12 is welded and fixed to the inner side of the lower end of the tubing head quadrilateral 1. The outer end of the connecting plate 12 is tilted downward by 45 degrees. An extension pipe 13 is welded and fixed vertically downward at the center of the connecting plate 12. The extension pipe 13 is convenient for the produced gas to pass into the inner position of the tubing head quadrilateral 1. A sealing ring 11 is fixed at the connection between the extension pipe 13 and the collecting box 8. The sealing ring 11 is convenient for sealing the connection between the collecting box 8 and the extension pipe 13. A plurality of through holes 15 are evenly opened on the outer side of the connecting plate 12.

[0066] The collection box is provided with two rows of flushing ports 16, and the flushing ports 16 are connected to a flushing pipe. Each row is provided with 5-10 small ports, and the flushing ports 16 are connected to a unified external flushing pipe, which is used to flush the collection box 8. Because part of the condensed water contains solid phase or crude oil, paraffin, etc., it is easy to cause the drain pipe 9 to be blocked if it is in the collection box 8 for a long time. When necessary, alkaline substances can be added to the flushing water used in the flushing pipe to synthesize the acidic condensed water. The inner surface of the collection box 8 is also provided with an anti-corrosion coating.

[0067] A valve is provided on the extension tube 13 , and when the water needs to be discharged, the extension tube 13 can be closed to prevent the high-pressure gas from flowing out of the drainage pipe 9 .

[0068] If a connecting pipe is provided at the sealing cover 10 , the connecting pipe is communicated to an external recovery area.

[0069] A heating device is provided on the inner side of the upper surface of the protruding block 14, and a circulating water system is preferably used in the heating device. A branch pipeline can be opened on the side of the cooling pipe 7, and valves are set on the cooling pipe 7 and the branch pipeline. The branch pipeline is connected to the circulating water system of the heating device. The energy used by the geothermal heat of the natural gas itself to heat the cooling pipe 7 is used to heat the collecting box 8 where the condensed water is located again, thereby avoiding problems such as condensation of the early paraffin in the collecting box 8. The circulated water returns to the cooling water tank again for repeated use.

[0070] Directions:

[0071] Directions:

[0072] The produced gas from the well is introduced into the inner position of the tubing head quad body 1 through the extension pipe 13, and low-temperature water is introduced into the inner position of the cooling pipe 7, so that the low-temperature water flows around the outer side of the lower end of the tubing head quad body 1 through the cooling pipe 7, thereby reducing the temperature inside the lower end of the tubing head quad body 1;

[0073] When the air flows through, the low temperature causes the water vapor inside the air flow to condense and gather on the inner wall of the lower end of the tubing head quad body 1, and then flows downward under the action of gravity, and then flows into the collection box 8 through the perforation 15;

[0074] The user regularly operates the sealing cover 10 to open it, so that the condensed water inside the collecting box 8 is discharged, which is convenient for handling and has the advantages of simple structure, convenient use and good use effect.

[0075] As a preferred embodiment, the low-temperature water used for cooling can be set at a temperature according to demand, or it can be replaced with a coolant with additives, and the constant temperature of the cooling water tank can be maintained to ensure that the cooling water (liquid) temperature meets the set requirements.

[0076] As a preferred embodiment, the sealed box cover 10 can be arranged underground or on the ground, and has a high-pressure sealing ring inside. The pressure resistance of the entire drying and recovery area is 50MPa, which meets the mining needs of most natural gas fields.

[0077] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A drying device for a gas wellhead, characterized in that: The invention comprises a tubing head quadrilateral (1), wherein an oil pipe hanger (2) is arranged at the upper end of the tubing head quadrilateral (1), a cooling pipe (7) is wound around the outer side of the lower end, wing valves (5) are arranged at both left and right ends, a threaded flange (6) is arranged at one end, a pressure gauge (3) is arranged at the other end, a stop valve (4) is fixedly installed at one end of the pressure gauge (3) away from the tubing head quadrilateral (1), a collecting box (8) is connected to the bottom end of the tubing head quadrilateral (1), and a drain pipe (9) and a sealing cover (10) at its end are arranged on the collecting box (8).

2. A drying device for a gas wellhead according to claim 1, characterized in that: A connecting plate (12) which is inclined upward is fixedly provided at the inner side of the lower end of the tubing head quadrilateral (1), and an extension pipe (13) which is vertically downward is fixedly connected to the connecting plate (12). The extension pipe (13) facilitates the passage of produced gas into the inner position of the tubing head quadrilateral (1), and a plurality of through holes (15) are evenly provided on the outer side of the connecting plate (12).

3. A drying device for a gas wellhead according to claim 1, characterized in that: A protruding block (14) for dividing the collection box (8) into two left and right parts is arranged at the center of the bottom of the collection box (8), and a drainage pipe (9) is horizontally inserted on both sides of the collection box (8) to connect the box body with the outside.

4. A drying device for a gas wellhead according to claim 3, characterized in that: The collection box (8) is provided with at least two rows of flushing ports (16), and the flushing ports (16) are connected to flushing pipes.

5. A drying device for a gas wellhead according to claim 3, characterized in that: The interior of the collecting box (8) is divided into two parts, left and right, by a protruding block (14), and the height of the side close to the protruding block (14) is higher than the side close to the drainage pipe (9).

6. A drying device for a gas wellhead according to claim 3, characterized in that: A heating device is provided on the inner side of the upper surface of the protruding block (14).

7. A drying device for a gas wellhead according to claim 6, characterized in that: The heating device is a circulating water system, a branch pipeline is opened on the side of the cooling pipe (7), valves are arranged on the cooling pipe (7) and the branch pipeline, the branch pipeline is connected to the circulating water system of the heating device, and the outlet of the circulating water system is connected back to the side of the cooling pipe (7).

8. A drying device for a gas wellhead according to claim 1, characterized in that: Sealing rings (11) are fixedly provided around the connection points between the collecting box (8), the tubing head quad (1) and the extension pipe (13).

9. A method for using a drying device for a gas wellhead, characterized in that: The following steps are involved: The produced gas from the well is passed into the tubing head quad (1) through an extension pipe (13); Low-temperature water is introduced into the cooling pipe (7), and the low-temperature water flows around the outer side of the lower end of the tubing head quadrilateral (1) through the cooling pipe (7); The low-temperature water causes the water vapor inside the airflow to condense and gather on the inner wall of the lower end of the tubing head quad (1), and flows into the collection box (8) under the action of gravity.

10. The method for using a drying device for a gas wellhead according to claim 9, characterized in that: When in use, the sealing cover (10) is opened regularly to discharge the condensed water inside the collecting box (8).

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