CN200985771Y - Low pressure gas generating field well head emergency cut-out valve - Google Patents
Low pressure gas generating field well head emergency cut-out valve Download PDFInfo
- Publication number
- CN200985771Y CN200985771Y CN 200620168518 CN200620168518U CN200985771Y CN 200985771 Y CN200985771 Y CN 200985771Y CN 200620168518 CN200620168518 CN 200620168518 CN 200620168518 U CN200620168518 U CN 200620168518U CN 200985771 Y CN200985771 Y CN 200985771Y
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- valve
- gas
- low pressure
- pilot
- piston
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Abstract
The utility model relates to a gas source shutoff valve used at wellheads of oil fields, in particular to an emergency shutoff valve used at wellheads of low pressure gas fields. The utility model is composed of a valve body, a valve seat, a guide gland cover, a valve handle, a valve cover frame, a main working cylinder, a main spring, a piston, a three way reversing valve, a high low pressure pilot valve set, an exhaust tank, a protective bidirectional pilot valve, a valve front high pressure stop valve, a pipeline filter, a gas liquid storage tank, a liquid injecting interface, a signal stop valve and a gas exhausting reset stop valve; wherein, the valve handle is connected with the valve clacks in the guide gland cover by a valve handle pressing sleeve in a mobile manner; and the piston position is provided with a liquid level indicating arm and the liquid injecting interface. When the signal of gas pipeline exceeds the designed pressure value, the valve may shut off the gas path automatically; when the signal is lower than the designed pressure value, the gas access may also be shut off by making the high low pressure pilot valve set push the valve clacks of the piston. The device may meet the requirements of cold regions in winter so that the downstream pipelines may realize emergency shutoff of the valve automatically in case of any accident. Furthermore, the utility model may make the gases in the pipelines run safely, thereby ensuring a safe production of the downstream gas pipelines.
Description
Technical field:
The utility model relates to oil field shaft mouth source of the gas Shuttoff Valve, especially low pressure aerogenesis field well head emergency shutdown valve.
Background technology:
China Soviet Union league (unit of length) gas field belongs to low hole (8.95%), hypotonic (0.73md), low yield (1～30,000 m
3/ d), low abundance (1.3 * 10
8m
3/ km
2), " six is low " gas field of low saturation (50～60%), low pressure (28MPa), belong to the marginal benefit gas field.Well head is given vent to anger unstable as is swum out of existing accident instantly and cause flow line to sprain to press when revealing and can not bring influence for downstream installation safety by the emergency cut-off gate, the well head instability of giving vent to anger.Also be not applicable at present the ripe or special well head emergency shutdown valve of these gas field characteristics.As adopting overseas equipment, price will increase construction investment widely up to 220,000 yuan more than, directly influence the overall economic benefit of engineering.
The utility model content:
The purpose of this utility model is in order to overcome above-mentioned shortcoming, and the low pressure aerogenesis field well head emergency shutdown valve that provides, this valve uses the back as line gas takes place and leaks, and can turn-off by automatic emergency, but guarantees the safety of downstream installation.
Technical solutions of the utility model:
For realizing above-mentioned task, the utility model by valve body, valve seat, pilot seal cover, valve rod, valve gap frame, main working cylinder, main spring, piston, three-way diverter valve, one way valve, high-low pressure pilot valve group, exhaust tank, the two-way pilot valve of protection, valve before high-pressure stop valve, piping filter, gas-liquid storage tank, fluid injection interface, signal stop valve, the venting stop valve that resets form; Described valve rod interconnects by the flap in valve rod gland and the pilot seal cover, is movable connection method.
Be provided with liquid level indicating arm and fluid injection interface at described piston position.
The utility model operating principle is:
This valve is installed on the flow line of downstream, when the normal gas transmission of Trunk Line, being close to road 20.0Mpa gas before valve can be by the high-pressure stop valve of opening, strainer by the road, enter the air chamber of solution-air storage tank, the pressure (energy) that the liquid chamber contain of (at the exhaust valve closure state) gas-liquid storage tank is certain.This pressure enters in the two-way pilot valve of protection by the road, is output as constant pressure 5.6-7.2Mpa from protecting two-way pilot valve, enters high-low pressure pilot valve group, because control gas signal P
2At normal value, high-low pressure pilot valve group is in cut-off state, no-output.Main valve is failure to actuate, and whole system is in holding state.
Reason such as pipeline breaking behind main valve, control gas signal P
2Descend.When reducing to low pressure pilot valve setting value, the low pressure pilot valve is opened, and brake fluid enters main working cylinder, promotes valve rod and moves down, and closes main valve.Otherwise, pipeline pressure P behind the main valve
2Raise, after the unlatching value that reaches the setting of high pressure pilot valve group, the conducting of high pressure pilot valve, brake fluid enters main working cylinder.The promotion valve rod moves down, and closes main valve.
Therefore; pressure can not be too high in the cylinder, thus a two-way pilot valve of protection is set, when entering pilot valve pressure and reach 5.6MPa; protect two-way pilot valve to close; because long-time leakage cause raises pilot valve pressure, when pressure is raised to 7.2MPa; protect two-way pilot valve to bleed off the pressure that exceeds; so the pressure that enters two-way pilot valve of low pressure and cylinder remains on 〉=5.6MPa≤7.2MPa between, promote piston and move downward, close main valve.
After maintenance finishes, recover normal operation, carry out following operation (this moment, main valve was in closed condition), high-pressure stop valve before the first shut off valve is opened the stop valve that resets of exitting, and three-way diverter valve is at automated location.Can be observed indicating arm and rise, when exhaust finishes.Close the stop valve that resets of exitting, open the preceding high-pressure stop valve of valve, valve is in holding state.The normal operation of whole system (pipeline).
The advantage that the utility model compared with prior art has is:
Because the valve body and the hydraulic control system that are equipped with in this device, thereby the running by executing agency makes this device can cut off source of the gas automatically above valve body under the situation in low pressure gas or pressure, during valve body work, when the pipeline signal pressure surpassed the setting pressure ceiling value, the high-voltage bidirectional pilot valve was opened, and gas enters gas one liquid storage tank, brake fluid enters cylinder, promote piston, piston promotes valve rod and flap moves downward, and path is cut off.When the pipeline signal pressure was lower than the low limit value of setting pressure, gas entered gas one liquid storage tank through the two-way pilot valve of overprotection, and brake fluid enters cylinder, promotes piston, and piston promotes valve rod and flap moves downward, and path can be cut off again.
This device signal pressure is realized by hydraulic control system, adapts to cold district production requirement in winter, has guaranteed emergency shutdown valve safe and reliable operation under any circumstance.
Description of drawings:
Fig. 1 is the utility model master pseudosection.Fig. 2 is the utility model side cutaway view.
Among the figure by 1, by valve body, 2, valve seat, 3, flap, 4, the pilot seal cover, 5, valve rod, 6 pointers, 7, the valve gap frame, 8, main working cylinder, 9, main spring, 10, piston, 11, three-way diverter valve, 12, one way valve, 13, high-low pressure pilot valve group, 14, exhaust tank, 15, protect two-way pilot valve, 16, high-pressure stop valve before the valve, 17, piping filter, 18, the gas-liquid storage tank, 19 liquid level indicating arms, 20, fluid injection interface, 21, the signal stop valve, 22, the venting stop valve that resets forms;
The specific embodiment:
The utility model is provided by following examples, below in conjunction with accompanying drawing the utility model is described further.
The structure of this valve is as shown in Figure 1: by valve body (1); valve seat (2); flap (3); pilot seal cover (4); valve rod (5); pointer (6); valve gap frame (7); main working cylinder (8); main spring (9); piston (10); triplet commutation ball valve (11); one way valve (12); high-low pressure pilot valve group (13); exhaust tank (14); protect two-way pilot valve (15); high-pressure stop valve (16) before the valve; piping filter (17); gas-liquid storage tank (18); liquid level indicating arm (19); fluid injection interface (20); signal stop valve (21); the venting main part such as stop valve (22) that resets is formed.This valve is a cuboid, high 1010mm, wide 368mm, thick 320mm.
Described flap 3 flexibly connects by valve rod gland and valve rod 5, makes flap that fine motion can be arranged after the connection, and can guarantee flap proper motion in pilot seal cover 4, no jam phenomenon, and guarantee the correct driving fit of sealing surface.This valve is provided with manual-lock in addition, as long as three-way diverter valve 11 is threaded to " hand " position, main valve is closed at once.Three-way diverter valve points to centre position (main valve is closed the back) can keep closed condition for a long time.
(normal maintenance, three-way diverter valve should be in automated location and get final product)
This valve is provided with fluid injection interface 20 and liquid level indicating arm 19.When entering redness, the liquid level indicating arm adds liquid zone (during holding state), and should be in time to fluid injection interface filling brake fluid.
Fluid injection program: 1, high-pressure stop valve 16 before the shut off valve, open the stop valve 22 that resets of exitting, the outward winding pressure cap of fluid injection interface 20, take out sealed steel ball, connect liquid injection pipe, liquid level indicating arm 19 is observed in fluid injection in fluid storage compartment (fluid injection need have 0.6Mpa pressure), the liquid level indicating arm rises, and illustrates that brake fluid injects.After the fluid injection, should lay sealed steel ball, screw pressure cap, close the stop valve (22) that resets of exitting, open the preceding high-pressure stop valve (16) of valve to fluid injection interface 20.This moment, valve entered holding state.Valve seat and flap 3 sealing surfaces are conical surface seal, sealing surface weld deposit Cr-Mn-B type carbide alloy.This valve should be installed on the pipeline of level.
Claims (2)
1, low pressure aerogenesis field well head emergency shutdown valve is by valve body (1), valve seat (2), flap (3), pilot seal cover (4), valve rod (5), pointer (6), valve gap frame (7), main working cylinder (8), main spring (9), piston (10), three-way diverter valve (11), one way valve (12), high-low pressure pilot valve group (13), exhaust tank (14), protect two-way pilot valve (15), high-pressure stop valve (16) before the valve, piping filter (17), gas-liquid storage tank (18), liquid level indicating arm (19), fluid injection interface (20), signal stop valve (21), the venting main part such as stop valve (22) that resets is formed; It is characterized in that: described valve rod (5) interconnects by the flap (3) in valve rod gland and the sealing shroud (4), and this connected mode is for flexibly connecting.
2, low pressure aerogenesis according to claim 1 field well head emergency shutdown valve, it is characterized in that: described piston (10) position is provided with liquid level indicating arm (19) and fluid injection interface (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620168518 CN200985771Y (en) | 2006-12-18 | 2006-12-18 | Low pressure gas generating field well head emergency cut-out valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620168518 CN200985771Y (en) | 2006-12-18 | 2006-12-18 | Low pressure gas generating field well head emergency cut-out valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200985771Y true CN200985771Y (en) | 2007-12-05 |
Family
ID=38915229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620168518 Expired - Fee Related CN200985771Y (en) | 2006-12-18 | 2006-12-18 | Low pressure gas generating field well head emergency cut-out valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200985771Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818055A (en) * | 2012-09-11 | 2012-12-12 | 中国人民解放军总后勤部油料研究所 | Automatic block valve |
| CN106090401A (en) * | 2016-08-05 | 2016-11-09 | 成都赛来科技有限公司 | Direct Travel spring reset hydraulic actuating mechanism |
| CN107940052A (en) * | 2017-04-02 | 2018-04-20 | 范文峰 | Automatic pipeline block valve |
| CN109372472A (en) * | 2018-12-10 | 2019-02-22 | 美钻深海能源科技研发（上海）有限公司 | Storm valve oil return hazardous gas separator |
| CN112228586A (en) * | 2020-09-25 | 2021-01-15 | 中国石油天然气股份有限公司 | Valve core, emergency cut-off valve and control method of emergency cut-off valve |
-
2006
- 2006-12-18 CN CN 200620168518 patent/CN200985771Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102818055A (en) * | 2012-09-11 | 2012-12-12 | 中国人民解放军总后勤部油料研究所 | Automatic block valve |
| CN106090401A (en) * | 2016-08-05 | 2016-11-09 | 成都赛来科技有限公司 | Direct Travel spring reset hydraulic actuating mechanism |
| CN106090401B (en) * | 2016-08-05 | 2018-07-17 | 成都赛来科技有限公司 | Direct Travel spring reset hydraulic actuating mechanism |
| CN107940052A (en) * | 2017-04-02 | 2018-04-20 | 范文峰 | Automatic pipeline block valve |
| CN107940052B (en) * | 2017-04-02 | 2021-06-29 | 范文峰 | Automatic pipeline block valve |
| CN109372472A (en) * | 2018-12-10 | 2019-02-22 | 美钻深海能源科技研发（上海）有限公司 | Storm valve oil return hazardous gas separator |
| CN112228586A (en) * | 2020-09-25 | 2021-01-15 | 中国石油天然气股份有限公司 | Valve core, emergency cut-off valve and control method of emergency cut-off valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20151218 |
|
| EXPY | Termination of patent right or utility model |