CN209855754U - Simple oil field well head associated gas collecting device - Google Patents
Simple oil field well head associated gas collecting device Download PDFInfo
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- CN209855754U CN209855754U CN201822065807.XU CN201822065807U CN209855754U CN 209855754 U CN209855754 U CN 209855754U CN 201822065807 U CN201822065807 U CN 201822065807U CN 209855754 U CN209855754 U CN 209855754U
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Abstract
A simple oilfield wellhead associated gas collecting device comprises a cover side air suction check valve, a cover side air exhaust check valve, a shaft side air suction check valve, a shaft side air exhaust check valve, a steel piston air cylinder, a piston, a power source, an upper connecting rod, a connecting rod position regulator, a cylinder bottom blow-down valve, corresponding pipelines and the like, wherein the inlet of the cover side air suction check valve is connected with a Christmas tree sleeve gas outlet gate valve, and the outlet of the cover side air suction check valve is connected with a steel piston air cylinder cover side air inlet; the inlet of the shaft side exhaust check valve is connected with a shaft side exhaust port of a steel piston air cylinder, and the outlet of the shaft side exhaust check valve is connected with an associated gas collecting pipeline; the bottom of the steel piston air cylinder is provided with a sewage discharge outlet and is provided with a cylinder bottom sewage discharge valve; the process is simple, the field manufacturing can be realized, the installation is convenient, and the maintenance is simple; low investment and low operation cost; single-double action flexible switching can be realized; the compression ratio range is large and adjustable; no extra power supply is needed for driving; the device is suitable for various working conditions such as continuous working conditions, intermittent working conditions and the like; the method is suitable for collecting the associated gas with the casing pressure lower than the back pressure.
Description
Technical Field
The utility model relates to an oil development technique, concretely relates to simple and easy oil field well head associated gas collection device.
Background
The energy shortage is the bottleneck of the Chinese development and is a great strategic problem of the development globality of the Chinese economic society. An effective method for solving the problem is open source throttling, and the recovery and utilization of the oilfield associated gas are an important way of the open source throttling.
The associated gas resource of the Chinese oil field is rich. According to incomplete statistics, only part of the associated gas burnt out every year by small oil fields which are limited and dispersed by regions is up to 12 multiplied by 108m3Left and right, corresponding to 12X 106t petroleum. The current associated gas collection methods mainly comprise the following methods:
(1) portable sleeve pipe gas recovery unit. The structure of the mobile casing gas recovery device mainly comprises a connecting part, a metering part, a pressurizing part and an anti-theft device. The sleeve gas recovery is realized mainly through a natural gas compressor, the device needs to purchase a new compressor, and the sleeve gas recovery is realized by consuming electric power
(2) And a constant pressure air release valve. The device is characterized in that a safety valve is actually arranged above an oil well casing, the safety valve is opened at any time according to the back pressure of an oil well, and if the casing gas reaches an annular pressure accumulation set value after overflowing, the casing gas is guided into a Christmas tree flow, so that the casing gas and crude oil are mixed together and are conveyed to the downstream together. The device can not realize the recovery of continuous casing gas.
(3) The recovery device is skid-mounted. The device is mainly used for recycling light hydrocarbon, is suitable for scattered oil wells with high associated gas content and low petroleum yield, and can fully recycle the light hydrocarbon by using a small skid-mounted device for power generation equipment or be processed into LNG or CNG on site for transporting the LNG or CNG out. The device is complex, the investment is high, the energy consumption is high, and the method is suitable for the oil well with high associated gas yield.
(4) Linkage type low-pressure air pump recovery device. The recovery device does not need other power, and the piston connecting rod of the air suction cylinder can drive the repeated movement of the piston of the air suction cylinder by means of the up-and-down movement of the walking beam only by welding the piston connecting rod of the air suction cylinder with the walking beam, so that the suction and compression of casing gas are realized, and after the casing gas is compressed to a certain degree, the casing gas can be mixed with crude oil through a Christmas tree flow and conveyed to the downstream for use. The device does not need extra power when working, can effectively improve the balance effect of the oil pumping unit, reduces the output power of the motor and has certain energy-saving effect; the wellhead back pressure can be reduced, and the load of the suspension point of the oil pumping unit is reduced.
Along with the increasing of national regulation of environmental pollution and energy waste in the process of energy exploitation, the control of VOC emission indexes is becoming stricter, energy conservation and emission reduction are one of restrictive indexes which must be completed, and the method is the point of making the construction of resource-saving and environment-friendly cities. The reasonable recycling of oil field associated gas resources is a problem to be solved urgently at present and is an inevitable trend of long-term and lasting development of energy.
Disclosure of Invention
The utility model aims at providing a simple and easy oil field well head associated gas collection device.
The main content of the utility model is realized by the following technical scheme:
a simple oilfield wellhead associated gas collecting device comprises a cover side air suction check valve, a cover side air exhaust check valve, a shaft side air suction check valve, a shaft side air exhaust check valve, a steel piston air cylinder, a piston, a power source, an upper connecting rod, a connecting rod position regulator, a cylinder bottom blow-down valve, corresponding pipelines and the like, and is characterized in that the inlet of the cover side air suction check valve is connected with a Christmas tree sleeve gas outlet gate valve, and the outlet of the cover side air suction check valve is connected with a steel piston air cylinder cover side air inlet; the inlet of the shaft side air suction check valve is connected with another outlet gate valve of the Christmas tree sleeve gas, and the outlet is connected with a shaft side air inlet of the steel piston inflator; the inlet of the cover side exhaust check valve is connected with a steel piston air cylinder cover side exhaust port, and the outlet of the cover side exhaust check valve is connected with an associated gas collecting pipeline; the inlet of the shaft side exhaust check valve is connected with a shaft side exhaust port of a steel piston air cylinder, and the outlet of the shaft side exhaust check valve is connected with an associated gas collecting pipeline; the power source of the steel piston air cylinder utilizes a wellhead beam-pumping unit and is connected with the steel piston air cylinder and the piston shaft by adopting a connecting rod connector; the bottom of the steel piston inflator is provided with a sewage outlet and a barrel bottom sewage valve.
And a connecting rod position regulator is arranged between the piston shaft and the connecting rod connector.
The steel piston air cylinder and the power source are connected with the steel piston air cylinder and the piston shaft through a rope hanger by utilizing a belt type oil pumping unit.
The steel piston cylinder can be directly manufactured on site by adopting a seamless steel pipe or a welded steel pipe.
The piston adopts a leather cup piston, a cast iron piston, a steel piston, an aluminum alloy piston or a combined piston.
The utility model not only has no influence on the oil well yield, but also reduces the bottom hole pressure through the collection of the casing gas, which is beneficial to improving the single well yield; the utility model can realize the closed oil gas transportation and reduce the emission of pollutants; the utility model has simple flow, can be manufactured on site, is convenient to install and is simple to maintain; low investment, low running cost and high cost performance; the flow range is wide, and single-action and double-action flexible switching can be realized; the compression ratio range is large and adjustable; no extra power supply is needed for driving; the device is suitable for various working conditions such as continuous working conditions, intermittent working conditions and the like; the method is suitable for collecting the associated gas with the casing pressure lower than the back pressure. The utility model discloses an at oil field popularization and application, can realize that low pressure associated gas collects and lasts stable continuous air feed, the pollutant reduction discharges, has better economic benefits and environmental protection benefit.
Drawings
Fig. 1 is a schematic view of the structure of the device of the present invention.
In the figure: 1. power source, 2, upper connecting rod, 3, connecting rod connector, 4, connecting rod position regulator, 5, shaft side suction check valve, 6, shaft side exhaust check valve, 7, shaft side air pressure chamber, 8, cover side air pressure chamber, 9, piston, 10, steel piston air cylinder, 11, piston shaft, 12, cover side suction check valve, 13, cylinder bottom blowoff valve, 14, cover side exhaust check valve.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
A simple oilfield wellhead associated gas collecting device comprises a cover side air suction check valve 12, a cover side air exhaust check valve 14, a shaft side air suction check valve 5, a shaft side air exhaust check valve 6, a steel piston air cylinder 10, a piston 9, a power source 1, an upper connecting rod 2, a connecting rod position regulator 4, a cylinder bottom blow-down valve 13, corresponding pipelines and the like, wherein the inlet of the cover side air suction check valve 12 is connected with a Christmas tree sleeve gas outlet gate valve, and the outlet of the cover side air suction check valve is connected with a cover side air inlet of the steel piston air cylinder 10; the inlet of the shaft side air suction check valve 5 is connected with another outlet gate valve of the Christmas tree sleeve gas, and the outlet is connected with a shaft side air inlet of a steel piston air cylinder 10; the inlet of the cover side exhaust check valve 14 is connected with the cover side exhaust port of the steel piston air cylinder 10, and the outlet is connected with an associated gas collecting pipeline; the inlet of the shaft side exhaust check valve 6 is connected with a shaft side exhaust port of a steel piston air cylinder 10, and the outlet is connected with an associated gas collecting pipeline; the steel piston air cylinder 10 and the power source 1 are connected with the steel piston air cylinder 10 and the piston shaft 11 by a connecting rod connector 3 by using a wellhead walking beam type oil pumping unit; the bottom of the steel piston air cylinder 10 is provided with a sewage discharge outlet and a cylinder bottom sewage discharge valve 13.
A connecting rod position regulator 4 is arranged between the piston shaft 11 and the connecting rod connector 3.
The steel piston cylinder 10 and the power source 1 are connected with the steel piston cylinder 10 and the piston shaft 11 through a rope hanger by utilizing a belt type oil pumping unit.
The steel piston cylinder 10 can be directly manufactured on site by adopting a seamless steel pipe or a welded steel pipe.
The piston 9 is a leather cup piston, a cast iron piston, a steel piston, an aluminum alloy piston or a combined piston.
As shown in fig. 1, the utility model relates to a simple and easy oil field well head associated gas collection device. The motion of a piston 9 in a steel piston air cylinder 10 is powered by a power source 1 (a walking beam or a rope hanger) through an upper connecting rod 2 and a connecting rod connector 3, and the stroke of the piston connecting rod can be adjusted through a connecting rod position adjuster 4; when the piston 9 of the steel piston air cylinder 10 is lifted, the valve clack of the cover side air suction check valve 12 on the cover side air pressure chamber 8 side is opened, the gas production tree sleeve associated gas passes through the cover side air suction check valve 12 and then fills the cover side air pressure chamber 8, and meanwhile, the valve clack of the cover side exhaust check valve 14 is closed to prevent the gas from flowing backwards; the valve clack of the shaft side air suction check valve 5 on the side of the shaft side air pressure chamber 7 is closed to prevent gas from flowing backwards, meanwhile, the valve clack of the shaft side exhaust check valve 6 is opened, and the associated gas enters an associated gas outward transmission pipeline after being pressurized in the shaft side air pressure chamber 7.
When a piston 9 of a steel piston air cylinder 10 is pressed down, a valve clack of a shaft side air suction check valve 5 of a shaft side air pressure chamber side 7 is opened, associated gas is filled in the shaft side air pressure chamber 7 under the action of pressure difference, and meanwhile, a valve clack of a shaft side exhaust check valve 6 is closed, so that gas in an outer delivery pipeline is prevented from flowing backwards to enter the shaft side air pressure chamber 7; and the valve clack of the cover side air suction check valve 12 at the cover side air pressure chamber 8 side is closed to prevent the gas from flowing back to the Christmas tree sleeve, the valve clack of the cover side exhaust check valve 14 is opened at the same time, and the associated gas enters an associated gas outward transmission pipeline after being pressurized in the cover side air pressure chamber 8.
The associated gas collection at the wellhead of the oil field can be realized by the process flow method that the power source 1 (walking beam or rope hanger) provides power and the piston 9 in the steel piston air cylinder 10 reciprocates. Along with the collection of associated gas, a blow-down valve 13 at the bottom of the cylinder is opened periodically through a steel piston gas cylinder 10 to remove condensate and impurities in the gas pressure chamber; the single-double action flexible switching of the collecting method of the process can be realized by manually adjusting the normal opening of the valve clack of the shaft side air suction check valve 5 and the normal closing of the valve clack of the shaft side exhaust check valve 6.
Claims (5)
1. The utility model provides a simple and easy oilfield wellhead associated gas collection device, includes lid side check valve (12) of breathing in, lid side exhaust check valve (14), axle side check valve (5) of breathing in, axle side exhaust check valve (6), steel piston inflator (10), piston (9), power supply (1), go up connecting rod (2), connecting rod position controller (4), bobbin base blowoff valve (13) and corresponding pipeline etc. its characterized in that: the inlet of the cover side air suction check valve (12) is connected with a Christmas tree sleeve air outlet gate valve, and the outlet is connected with a cover side air inlet of a steel piston air cylinder (10); the inlet of the shaft side air suction check valve (5) is connected with another outlet gate valve of the Christmas tree sleeve gas, and the outlet is connected with a shaft side air inlet of a steel piston air cylinder (10); the inlet of the cover side exhaust check valve (14) is connected with a steel piston air cylinder (10) and the cover side exhaust port, and the outlet is connected with an associated gas collecting pipeline; the inlet of the shaft side exhaust check valve (6) is connected with a shaft side exhaust port of a steel piston air cylinder (10), and the outlet is connected with an associated gas collecting pipeline; a power source (1) of the steel piston air cylinder (10) is connected with the steel piston air cylinder (10) and the piston shaft (11) by a connecting rod connector (3) by using a wellhead beam-pumping unit; the bottom of the steel piston air cylinder (10) is provided with a sewage discharge outlet, and a cylinder bottom sewage discharge valve (13) is arranged.
2. The simplified oilfield wellhead associated gas collection device according to claim 1, wherein a connecting rod position regulator (4) is arranged between the piston shaft (11) and the connecting rod connector (3).
3. The simple oilfield wellhead associated gas collection device according to claim 1, wherein the steel piston cylinder (10) and the power source (1) are connected with the steel piston cylinder (10) and the piston shaft (11) through a rope hanger by using a belt type pumping unit.
4. The simple oilfield wellhead associated gas collection device according to claim 1, wherein the steel piston cylinder (10) can be directly manufactured on site by using seamless steel pipes or welded steel pipes.
5. The simple oilfield wellhead associated gas collection device according to claim 1, wherein the piston (9) is a cup piston, a cast iron piston, a steel piston, an aluminum alloy piston or a combined piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822065807.XU CN209855754U (en) | 2018-12-10 | 2018-12-10 | Simple oil field well head associated gas collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822065807.XU CN209855754U (en) | 2018-12-10 | 2018-12-10 | Simple oil field well head associated gas collecting device |
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| CN209855754U true CN209855754U (en) | 2019-12-27 |
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| CN201822065807.XU Active CN209855754U (en) | 2018-12-10 | 2018-12-10 | Simple oil field well head associated gas collecting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538169A (en) * | 2018-12-10 | 2019-03-29 | 胜利油田森诺胜利工程有限公司 | A kind of simple oil field shaft mouth associated gas collection device and method |
-
2018
- 2018-12-10 CN CN201822065807.XU patent/CN209855754U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538169A (en) * | 2018-12-10 | 2019-03-29 | 胜利油田森诺胜利工程有限公司 | A kind of simple oil field shaft mouth associated gas collection device and method |
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