CN212249951U

CN212249951U - Large-drift-diameter high-pressure wellhead valve

Info

Publication number: CN212249951U
Application number: CN202020340038.4U
Authority: CN
Inventors: 刘伟; 丁明娟; 胡亮
Original assignee: Yancheng Jinlongda Machinery Manufacturing Co ltd
Current assignee: Yancheng Jinlongda Machinery Manufacturing Co ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-12-29
Anticipated expiration: 2030-03-11

Abstract

The utility model relates to a big latus rectum high pressure well head valve, include: the valve comprises a tail cover, a lower guide rod, a lower packing gland, a packing gasket, packing, a screw-loading bolt, a grease injection valve, a lower valve cover, a sealing gasket ring, a valve body, a gate plate, a valve seat, an inner sealing ring, an outer sealing ring, an upper valve cover, a set screw, a support, a grease nozzle, an upper packing gland, a needle bearing, a support sleeve, a valve rod, a cylindrical pin, a ball screw, an inner hexagon bolt, a valve cover, a hand wheel pin, a hand wheel, a locking screw and a pressure release valve, wherein the well head valve is an open-stem flange type flat gate valve, the main drift diameter is not less than phi 180mm, the working pressure is not less than 70MPa, the valve body and the valve cover of the valve are made of high-strength alloy steel materials, the gate plate, the valve seat and the valve rod are made of anti-corrosion stainless steel materials, nickel-based alloy materials.

Description

Large-drift-diameter high-pressure wellhead valve

Technical Field

The utility model belongs to the petroleum machinery field, in particular to big latus rectum high pressure well head valve.

Background

At present, according to the information display fed back by an oil field, in the process of acidizing or fracturing operation of a wellhead, the circulation of acidizing fluid or fracturing sand is small due to the small drift diameter and low working pressure of a used wellhead valve, so that the working time of personnel is prolonged, and the working efficiency of the personnel is reduced; under an acidic environment, the corrosion resistance and the anti-scouring performance of the interior of the valve are poor, so that the service life of the valve is shortened; the valve is opened under the condition of high pressure, the opening and closing torque is huge, and the labor intensity of operators is increased; because the valve works in an acid environment for a long time, a rubber sealing piece adopted by the valve is corroded, so that the sealing performance of the valve is deteriorated, fluid leakage is easy to cause, and safety accidents occur; the above are problems that the production and use units need to solve together.

Disclosure of Invention

In order to solve among the prior art well head valve the latus rectum little, operating pressure is low, and valve switch moment of torsion is big, and valve sealing performance is poor, the inside corrosion-resistant, the not good technical problem of scour prevention of valve, the utility model provides a big latus rectum high pressure well head valve.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a large bore high pressure wellhead valve comprising: the device comprises a tail cover, a lower guide rod, a lower packing gland, a packing gasket, packing, a screw-loading bolt, a grease injection valve, a lower valve cover, a sealing gasket ring, a valve body, a flashboard, a valve seat, an inner sealing ring, an outer sealing ring, an upper valve cover, a set screw, a bracket, a grease nipple, an upper packing gland, a needle bearing, a support sleeve, a valve rod, a cylindrical pin, a ball screw, an inner hexagon bolt, a valve cover, a hand wheel pin, a hand wheel, a locking screw and a pressure release valve; the method is characterized in that: the well mouth valve is a rising stem flange type flat gate valve, the main drift diameter is larger than or equal to phi 180mm, the working pressure is larger than or equal to 70MPa, the valve body and the valve cover of the valve are made of high-strength alloy steel materials, the flashboard, the valve seat and the valve rod are made of anti-corrosion stainless steel materials, the nickel-based alloy materials are welded at the contact part of the interior of the valve and fluid, the surface of the flashboard and the surface of the valve seat are subjected to tungsten carbide supersonic spraying, and the surface of.

As a further improvement, the opening transmission device of the valve is a ball screw, the valve rod sealing element and the valve seat sealing element are made of metal composite materials, and a stainless steel metal sealing ring is used in a sealing manner between the valve body and the valve cover.

As the utility model discloses a further improvement, the upper and lower both ends of valve body link to each other with the valve gap, and the disk seat is installed in the inside of valve body, and inside the valve body was arranged in to the flashboard, the upper end of flashboard was equipped with the T-slot, is connected with valve rod head, and the valve rod passes through the valve gap again inside to be connected with ball, and after rotating ball, the valve rod drove the flashboard and upper and lower parallel slide between the disk seat, has realized opening and closing of well head valve.

The utility model has the advantages that: the main drift diameter of the wellhead valve is designed to be larger than or equal to phi 180mm, the working pressure is larger than or equal to 70MPa, and the requirements of large drift diameter and high working pressure of the valve are met, so that the flow of acidizing fluid or fracturing sand is increased, the working time of personnel is reduced, and the working efficiency of the personnel is increased in the process of acidizing or fracturing operation of the wellhead; the valve body and the valve cover of the valve are made of high-strength alloy steel materials, the flashboard, the valve seat and the valve rod are made of anti-corrosion stainless steel materials, the nickel-based alloy materials are welded on the contact part of the interior of the valve and fluid in a surfacing mode, tungsten carbide supersonic spraying is carried out on the surface of the flashboard and the surface of the valve seat, and nitriding treatment is carried out on the surface of the valve rod; the opening transmission device of the valve is a ball screw, and the valve is opened under the condition of belt pressure, so that the valve opening and closing torque is effectively reduced, and the labor intensity of operators is reduced; the valve rod sealing element and the valve seat sealing element are made of metal composite materials, and work in an acid environment for a long time, so that the sealing performance of the valve is obviously enhanced, fluid leakage is avoided, and the safety factor of a site is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a large-drift-diameter high-pressure wellhead valve of the utility model.

Fig. 2 is an enlarged cross-sectional structural view of fig. 1.

In fig. 1, the method comprises the following steps: the novel hydraulic oil filling valve comprises a tail cover 1, a lower guide rod 2, a lower packing gland 3, a packing gasket 4-1, packing 5-1, a wire loading bolt 6-1, a grease injection valve 7-1, a lower valve cover 8-1, a sealing gasket ring 9-1, a valve body 10, a gate plate 11, a valve seat 12, an inner sealing ring 13, an outer sealing ring 14, a sealing gasket ring 9-2, an upper valve cover 8-2, a grease injection valve 7-2, a wire loading bolt 6-2, packing 5-2, a packing gasket 4-2, a set screw 15, a support 16, a grease nipple 17, an upper packing gland 18, a needle bearing 19, a support sleeve 20, a valve rod 21, a cylindrical pin 22, a ball screw 23, an inner hexagonal bolt 24, a valve cover 25, a hand wheel pin 26, a hand wheel 27, a locking screw 28 and a pressure release valve 29.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

The lower valve cover 8-1 is connected with the valve body 10 through a wire-carrying bolt 6-1, a sealing gasket ring 9-1 is arranged between the lower valve cover 8-1 and the valve body 10, a packing 5-1 and a packing gasket 4-1 are sequentially arranged in a packing groove of the lower valve cover 8-1 and are tightly pressed through a lower packing gland 3, a tail cover 1 is screwed on the lower valve cover 8-1, and a grease injection valve 7-1 and a pressure release valve 29 are respectively arranged on two sides of the periphery of the lower valve cover 8-1 and are used for injecting grease and releasing pressure of the valve; the upper valve cover 8-2 is connected with the valve body 10 through a wire-loading bolt 6-2, the sealing gasket ring 9-2 is placed between the upper valve cover 8-2 and the valve body 10, the packing 5-2 and the packing gasket 4-2 are sequentially placed in a packing groove of the upper valve cover 8-2 and are tightly pressed through an upper packing gland 18, and the grease injection valve 7-2 is installed on the periphery of the upper valve cover 8-2 and is used for injecting grease into the valve; the valve seat 12 is placed inside the valve body 10, and the inner sealing ring 13 and the outer sealing ring 14 are placed in a sealing groove of the valve seat 12 and used for sealing the valve; the flashboard 11 is placed in an inner cavity of the valve body 10 and is tightly contacted with the valve seat 12 to form a sealing surface, a T-shaped groove is formed in the lower portion of the flashboard 11 and is connected with the head portion of the lower guide rod 2, the lower guide rod 2 penetrates through the lower valve cover 8-1 and is tightly contacted with the packing 5-1 to play a sealing role, a T-shaped groove is also formed in the upper portion of the flashboard 11 and is connected with the head portion of the valve rod 21, and the valve rod 21 penetrates through the lower valve cover 8-2 and is tightly contacted with the packing; the tail part of a valve rod 21 is connected with a ball screw 23 and fixed by a cylindrical pin 22, the ball screw 23 and a needle bearing 19 are sequentially arranged on an upper packing gland 18 and screwed on an upper valve cover 8-2 by a bracket 16 to fix the ball screw 23 and the needle bearing 19, a set screw 15, a grease nipple 17 and a locking screw 28 are sequentially arranged on the periphery of the bracket 16, the ball screw 23 is connected with a valve cover 25 by an inner hexagon bolt 24, a hand wheel 27 is arranged on the valve cover 25 and fixed by a hand wheel pin 26; when the locking screw 28 is loosened and the hand wheel 27 is rotated, the ball screw 23 and the valve rod 21 are rotated together, so that the gate plate 11 is easily driven to slide between the valve seats 12 to open and close the valve, and when the locking screw 28 is tightened, the ball screw 23 stops rotating, so that the position of the gate plate 11 is fixed.

Claims

1. A large bore high pressure wellhead valve comprising: the device comprises a tail cover, a lower guide rod, a lower packing gland, a packing gasket, packing, a screw-loading bolt, a grease injection valve, a lower valve cover, a sealing gasket ring, a valve body, a flashboard, a valve seat, an inner sealing ring, an outer sealing ring, an upper valve cover, a set screw, a bracket, a grease nipple, an upper packing gland, a needle bearing, a support sleeve, a valve rod, a cylindrical pin, a ball screw, an inner hexagon bolt, a valve cover, a hand wheel pin, a hand wheel, a locking screw and a pressure release valve; the method is characterized in that: the well mouth valve is a rising stem flange type flat gate valve, the main drift diameter is larger than or equal to phi 180mm, the working pressure is larger than or equal to 70MPa, the valve body and the valve cover of the valve are made of high-strength alloy steel materials, the flashboard, the valve seat and the valve rod are made of anti-corrosion stainless steel materials, the nickel-based alloy materials are welded at the contact part of the interior of the valve and fluid, the surface of the flashboard and the surface of the valve seat are subjected to tungsten carbide supersonic spraying, and the surface of.

2. A large bore high pressure wellhead valve as claimed in claim 1 wherein: the opening transmission device of the valve is a ball screw, the valve rod sealing element and the valve seat sealing element are made of metal composite materials, and a stainless steel metal sealing ring is used for sealing between the valve body and the valve cover.

3. A large bore high pressure wellhead valve as claimed in claim 1 wherein: the upper and lower both ends of valve body link to each other with the valve gap, and the disk seat is installed in the inside of valve body, and inside the valve body was arranged in to the flashboard, the upper end of flashboard was equipped with the T-slot, was connected with valve rod head, and the valve rod passes through the valve gap again inside to be connected with ball, and after rotating ball, the valve rod drove the upper and lower parallel of flashboard between the disk seat and slided, has realized opening and closing of well head valve.