Gas production wellhead device with anti-corrosion function

Abstract

The utility model discloses a gas production wellhead device with an anti-corrosion function, which comprises a gas production wellhead structure, a dry anti-corrosion structure is mounted on the gas production wellhead structure, the gas production wellhead structure comprises a tubing head four-way body serving as a foundation, and tube valves are mounted on two sides of the tubing head four-way body. A tubing hanger is installed on the tubing head four-way body, a side wing flange and a pressure gauge are conveniently installed at one end of the tube valve, a stop valve is installed at one end of the tube valve, the drying anti-corrosion structure comprises a flange connecting pipe with the interior of a hollow structure, threaded holes are formed in the surface of the flange connecting pipe, and a hollow cavity disc is fixed in the flange connecting pipe. The gas production wellhead device with the anti-corrosion function comprises a hollow cavity disc, a waterproof coating and an anti-corrosion coating are sprayed in the hollow cavity disc, vent holes are formed in the hollow cavity disc in a penetrating mode, connecting holes are formed in the periphery of the surface of the hollow cavity disc in a penetrating mode, and according to the gas production wellhead device with the anti-corrosion function, installation and connection are achieved through the arranged tubing head four-way body.

Description

Technical Field

[0001] The utility model relates to the technical field of gas production wellhead devices, in particular to a gas production wellhead device with an anti-corrosion function. Background Art

[0002] The H2S, CO2, Cl- and other easily corroded wellhead devices in acid gas wells directly affect the normal production of acid gas fields and even cause major accidents. The commonly used anti-corrosion methods are mainly to paint the inside of the pipe or use special corrosion-resistant alloy materials to prepare the pipe. However, the corrosion resistance effect is not very ideal in actual production. After searching, it was found that the existing public technology has the publication number: CN214303762U, an anti-corrosion type oil and gas wellhead device, including a tubing head quad and a drying mechanism; the drying mechanism is arranged in the horizontal direction of the lower part of the tubing head quad; the drying mechanism includes a connecting pipe, a bottom Plate, gland and pressing piece; both ends of the connecting pipe are provided with connecting flanges so as to be detachably connected to the tubing head quad; a plurality of air vents are provided on the upper surface of the base plate and the upper surface of the gland; the base plate is fixed on the cross section of the connecting pipe, the gland is pressed on the base plate and a cavity for accommodating the desiccant is formed between the two; the pressing piece is provided on the connecting pipe and detachably presses the gland against the base plate; the setting of the drying mechanism dries the gas inside the tubing head quad, and since the acidic gas itself does not have corrosive properties, the acidic gas is prevented from dissolving in water or salt to form carbonic acid after drying, thereby achieving the function of preventing corrosion of the gas wellhead.

[0003] In summary: the desiccant placed in the above case requires the desiccant mechanism and the tubing head quad to be disassembled before the desiccant and the desiccant mechanism can be replaced. However, this replacement method in the above case is not only troublesome but also has cumbersome replacement steps. Utility Model Content

[0004] The purpose of the present invention is to address the deficiencies of the prior art and to provide a gas wellhead device with an anti-corrosion function, so as to solve the problem proposed in the above background technology that the desiccant placed in the above case needs to be replaced by disassembling the drying mechanism and the tubing head quad. However, such a replacement method in the above case is not only troublesome but also has cumbersome replacement steps.

[0005] To achieve the above object, the present invention provides the following technical solutions: a gas wellhead device with an anti-corrosion function, comprising a gas wellhead structure, on which a dry anti-corrosion structure is installed;

[0006] The gas production wellhead structure includes a tubing head quad as a foundation, and pipe valves are installed on both sides of the tubing head quad, and a tubing hanger is installed on the tubing head quad;

[0007] One end of the pipe valve is conveniently equipped with a side flange and a pressure gauge, and one end of the pipe valve is equipped with a stop valve.

[0008] By adopting the above technical solution, the tubing head quad body is provided to achieve installation and connection.

[0009] Preferably, the dry anti-corrosion structure includes a flange connecting pipe with a hollow structure inside, and threaded holes are opened on the surface of the flange connecting pipe. At the same time, a hollow cavity disk is fixed inside the flange connecting pipe, and the inside of the hollow cavity disk is sprayed with a waterproof coating and an anti-corrosion coating.

[0010] By adopting the above technical solution, the waterproof coating is provided to prevent corrosion.

[0011] Preferably, the hollow cavity disk is provided with ventilation holes, and the surface of the hollow cavity disk is provided with connection holes, and the connection holes are aligned with the threaded holes and are connected therewith.

[0012] By adopting the above technical solution, gas transportation is achieved through the provided air holes.

[0013] Preferably, the hollow cavity disk is equipped with a through-hole placement column through the connecting hole, and a placement groove for placing the desiccant is provided above the through-hole placement column. At the same time, one end of the through-hole placement column is rotatably connected to the threaded recess through an installation bearing.

[0014] By adopting the above technical solution, a rotational connection is achieved through the provided mounting bearing.

[0015] Preferably, a handle is fixed on the surface of the threaded recess, and the handle is arranged in a cross shape.

[0016] By adopting the above technical solution, the provided handle can be used for gripping and rotating adjustment.

[0017] Preferably, there are four threaded holes, and the threaded holes are arranged in a ring array about the flange connection pipe.

[0018] By adopting the above technical solution, threaded connection is achieved through the threaded holes.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the gas wellhead device with anti-corrosion function,

[0020] (1) This case solves the problem that the desiccant placed in the above case needs to be replaced by disassembling the drying mechanism and the tubing head quadrilateral by means of the threaded hole, through-hole placement column, placement groove, threaded recess and handle provided in the drying anti-corrosion structure. However, the replacement method in the above case is not only troublesome but also has complicated replacement steps. When the desiccant needs to be replaced, the operator uses the handle to rotate the threaded recess and the threaded hole to separate it. After the threaded recess and the threaded hole are separated by force, the through-hole placement column and the flange connection pipe are separated to remove the desiccant inside the placement groove for replacement.

[0021] (2) The following problems are solved by setting up the flange connecting pipe, hollow cavity disk, waterproof coating, anti-corrosion coating and air vents in the dry anti-corrosion structure: the gas cannot be transported dry and the gas easily contains moisture and easily corrodes the hollow cavity disk. During the gas transportation process, the gas is transported through the air vents, and the gas passing through the air vents is dried by the hollow cavity disk and then transported to the inside of the tubing head quad again. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the gas production wellhead structure of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the flange connection pipe, threaded hole, handle and threaded recess of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the waterproof coating and anti-corrosion coating of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the hollow cavity disk, ventilation holes, connecting holes, through-hole placement columns, placement grooves, handles and threaded recesses of the utility model.

[0027] In the figure: 1. Gas wellhead structure; 101. Tubing head quadrilateral; 102. Pipe valve; 103. Tubing hanger; 104. Flange; 105. Pressure gauge; 106. Stop valve; 2. Dry and anti-corrosion structure; 201. Flange connecting pipe; 202. Threaded hole; 203. Hollow cavity disc; 204. Waterproof coating; 205. Anti-corrosion coating; 206. Breathing hole; 207. Connecting hole; 208. Through-hole placement column; 209. Placement groove; 2010. Handle; 2011. Threaded recess. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-5 The utility model provides a technical solution: a gas wellhead device with anti-corrosion function, such as Figure 1 and Figure 2 As shown, the gas production wellhead structure 1 includes a tubing head spool 101 as a base, and pipe valves 102 are installed on both sides of the tubing head spool 101. At the same time, a tubing hanger 103 is installed on the tubing head spool 101.

[0030] One end of the pipe valve 102 is conveniently installed with a side flange 104 and a pressure gauge 105, and a stop valve 106 is installed at one end of the pipe valve 102. Among them, the above-mentioned components all adopt the component installation settings in the comparative document, and the normal connection and transportation between the components are guaranteed when the components in the comparative document are installed in the same manner.

[0031] like Figure 3 、 Figure 4 and Figure 5 As shown, a dry anti-corrosion structure 2 is installed on the gas wellhead structure 1, and the dry anti-corrosion structure 2 includes a flange connecting pipe 201 with a hollow structure inside, and a threaded hole 202 is opened on the surface of the flange connecting pipe 201. There are 4 threaded holes 202, and the threaded holes 202 are arranged in a circular array about the flange connecting pipe 201. When there are 4 threaded holes 202 opened by the above structure, it not only reflects the equidistant distribution of the above structure, but also reflects the threaded installation and disassembly of the above structure. When there are 4 threaded holes opened by the above structure, it also reflects the practicality of the above structure and the aesthetics of the symmetrical opening. At the same time, a hollow cavity disk 203 is fixed inside the flange connecting pipe 201, and a waterproof coating 204 and an anti-corrosion coating 205 are sprayed inside the hollow cavity disk 203.

[0032] Furthermore, the hollow cavity disc 203 is provided with a ventilation hole 206 , and the surface of the hollow cavity disc 203 is provided with connecting holes 207 . The connecting holes 207 are aligned with and connected to the threaded holes 202 .

[0033] Furthermore, the hollow cavity disc 203 is provided with a through-hole placement column 208 through the connecting hole 207, and a placement groove 209 for placing the desiccant is provided above the through-hole placement column 208. At the same time, one end of the through-hole placement column 208 is rotatably connected to the threaded recess 2011 through an installation bearing.

[0034] Furthermore, in the above solution, a handle 2010 is fixed on the surface of the threaded recess 2011, and the handle 2010 is arranged in a cross shape.

[0035] In the above solution, when the desiccant needs to be replaced, the operator uses the handle 2010 to rotate the threaded recess 2011 and the threaded hole 202 to separate them. When the threaded recess 2011 and the threaded hole 202 are separated by force, the through-hole placement column 208 is separated from the flange connecting pipe 201 to remove the desiccant inside the placement groove 209 and replace it.

[0036] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the protection content of the present invention.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas wellhead device with an anti-corrosion function, comprising a gas wellhead structure (1), characterized in that: A dry anti-corrosion structure (2) is installed on the gas production wellhead structure (1); The gas production wellhead structure (1) includes a tubing head quad (101) as a foundation, and pipe valves (102) are installed on both sides of the tubing head quad (101), and a tubing hanger (103) is installed on the tubing head quad (101); One end of the pipe valve (102) is conveniently mounted with a side flange (104) and a pressure gauge (105), and one end of the pipe valve (102) is mounted with a stop valve (106); The dry anti-corrosion structure (2) comprises a flange connection pipe (201) with a hollow structure inside, and a threaded hole (202) is opened on the surface of the flange connection pipe (201). At the same time, a hollow cavity disk (203) is fixed inside the flange connection pipe (201), and the interior of the hollow cavity disk (203) is sprayed with a waterproof coating (204) and an anti-corrosion coating (205); The hollow cavity disc (203) is provided with a through-hole placement column (208) via a connection hole (207), and a placement groove (209) for placing a desiccant is provided above the through-hole placement column (208). At the same time, one end of the through-hole placement column (208) is rotatably connected to the threaded recess (2011) via a mounting bearing.

2. The gas wellhead device with anti-corrosion function according to claim 1, characterized in that: The hollow cavity disc (203) is provided with a ventilation hole (206) extending therethrough, and connection holes (207) are provided on the periphery of the surface of the hollow cavity disc (203), and the connection holes (207) are aligned with and connected to the threaded holes (202).

3. The gas wellhead device with anti-corrosion function according to claim 1, characterized in that: A handle (2010) is fixed on the surface of the threaded recess (2011), and the handle (2010) is arranged in a cross shape.

4. The gas production wellhead device with anti-corrosion function according to claim 1, characterized in that: Four threaded holes (202) are provided, and the threaded holes (202) are arranged in a ring array with respect to the flange connection pipe (201).

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