CN105626034A

CN105626034A - Automatic metering device for oil well gas yield

Info

Publication number: CN105626034A
Application number: CN201410621245.6A
Authority: CN
Inventors: 董艾平; 刘董宇; 胡馨云; 姜兴伟; 陈军; 常峰; 隋国勇; 曲立明; 王春光; 姜春娟; 齐伟; 陈兴慧; 李贵勇
Original assignee: China Petroleum and Chemical Corp; Technology Inspection Center of Sinopec Shengli Oilfield Co
Current assignee: China Petroleum and Chemical Corp; Technology Inspection Center of Sinopec Shengli Oilfield Co
Priority date: 2014-11-07
Filing date: 2014-11-07
Publication date: 2016-06-01
Anticipated expiration: 2034-11-07
Also published as: CN105626034B

Abstract

The invention discloses an automatic metering device for the oil well gas yield. The automatic metering device for the oil well gas yield comprises a main pipeline, bypass pipes are disposed on the upper side and the lower side of the main pipeline correspondingly, the bypass pipe at the bottom serves as a liquid runner, and the bypass pipe on the upper side serves as a gas runner. A gas-liquid cyclone separator is disposed at the front port of the main pipeline. A gas guide pipe which extends towards and faces the gas-liquid cyclone separator is disposed in the gas runner. A gas volume flow meter is further arranged on the bypass pipe on the upper side. A gap is reserved between the outer side of the gas guide pipe and the inner wall of the main pipeline, and the gap is a passing gap of a liquid ring. A secondary separator is further disposed in the bypass pipe on the upper side. The gas guide pipe is connected to the front end of the secondary separator. The gas volume flow meter is disposed in rear of the secondary separator. The automatic metering device is small in size, reliable in performance, convenient to operate and maintain and suitable for being used for an oil well mouth. A metering process is simple, the moderate cost is just needed, the metering accuracy is high, low carbon and environmental protection are achieved, pollution is avoided, and the production demand of an oilfield can be met.

Description

Oil well gas production self-measuring device

Technical field

The present invention relates to oilfield gas production measuring equipment, specifically oil well gas production self-measuring device.

Background technology

Being always accompanied by the existence of natural gas in oil extraction process, the change of tolerance is the important content of oil well output change. Traditional oil gas metering mode is to adopt gs-oil separator, and oil-gas mixture carrys out the size of tolerance in liquid further according to the time in gas hydraulic fluid face by manually calculating rough producing well after gas-liquid separation, low gas well, without gas well operating difficulties. In recent years, the metering method of " oil well indicator card gauging " obtains large-area popularization and application, but which cannot realize the accurate metering of gas production, brings a new difficult problem to WPA and block geological analysis. The oil gas water multiphase measurement device that present stage abroad adopts is mostly bulky, and cost intensive is difficult in maintenance, and is not suitable for well mouth of oil well use.

Summary of the invention

It is an object of the invention to provide oil well gas production self-measuring device, easy to operate, simple in construction, be easy to safeguard, economical and practical.

In order to reach above-mentioned purpose, present invention employs following technical scheme, oil well gas production self-measuring device, including main pipeline, the upper and lower both sides of described main pipeline are each opens a bypass pipe, and wherein the bypass pipe of bottom is flow channel for liquids, the bypass pipe of upside is gas flow, the front port of described main pipeline arranges gas-liquid cyclone separator, arranges one and stretch to and towards the airway of gas-liquid cyclone separator, the bypass pipe of described upside also set up gas volume flow gauge in described gas flow.

There is outside described airway and between main pipeline inwall gap, this gap be pendular ring pass through gap.

Also setting up second-stage separator in the bypass pipe of described upside, described airway is connected to second-stage separator front end, and gas volume flow gauge is arranged on the rear of second-stage separator.

The top of described second-stage separator increases least one set silk screen fine separator.

Described second-stage separator top increases at least one of which drop drainage screen.

Compared to prior art, the method have the advantages that

1, metering device volume is little, dependable performance, convenient operating maintenance, it is adaptable to oil well mouth uses.

2, metering process is simple, moderate cost, and measuring accuracy is high, and low-carbon environment-friendly, pollution-free, can meet oil field and produce needs, have bigger promotional value at industry measurement system regions.

Accompanying drawing explanation

Fig. 1 is the structural representation of the oil well gas production self-measuring device of the present invention.

In figure: 1 is gas-liquid cyclone separator; 2 is airway; 3 is second-stage separator; 4 is gas volume flow gauge.

Detailed description of the invention

Detailed description for the present invention and technology contents, coordinate accompanying drawing to illustrate as follows, but accompanying drawing only provides reference and purposes of discussion, is not used for the present invention is any limitation as.

With reference to accompanying drawing 1, oil well gas production self-measuring device, including main pipeline, the upper and lower both sides of described main pipeline are each opens a bypass pipe, wherein the bypass pipe of bottom is flow channel for liquids, and the bypass pipe of upside is gas flow, and the front port of described main pipeline arranges gas-liquid cyclone separator 1, arrange one in described gas flow stretch to and towards the airway 2 of gas-liquid cyclone separator, the bypass pipe of described upside also set up gas volume flow gauge 4. There is outside described airway and between main pipeline inwall gap, this gap be pendular ring pass through gap. Also setting up second-stage separator 3 in the bypass pipe of described upside, described airway is connected to second-stage separator front end, and mass-flow gas meter is arranged on the rear of second-stage separator.

First pass through the novel gas-liquid cyclone separator of appropriate design, gas and liquid is made to separate in pipeline under the influence of centrifugal force, by scattered air accumulation to pipeline center region, liquid becomes pendular ring around gas karyomorphism, both flow parallel in pipeline and do not mix mutually, and after flash trapping stage, liquid directly switches to downstream. With airway circumnuclear to gas and gas a small amount of liquid imported in two grades of gas-liquid separators in the lump and carry out the second-order separation, the drainage screen of several groups of silk screen fine separators or other form is increased on the top of separator, to further filter out fine drop, measure to obtain volumetric flow of gas finally by volumetric flow of gas.

The foregoing is only presently preferred embodiments of the present invention, be not used to limit the scope of the claims of the present invention, other use the equivalent of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.

Claims

1. oil well gas production self-measuring device, including main pipeline, it is characterized in that, the upper and lower both sides of described main pipeline are each opens a bypass pipe, wherein the bypass pipe of bottom is flow channel for liquids, and the bypass pipe of upside is gas flow, and the front port of described main pipeline arranges gas-liquid cyclone separator, arrange one in described gas flow stretch to and towards the airway of gas-liquid cyclone separator, the bypass pipe of described upside also set up gas volume flow gauge.

2. oil well gas production self-measuring device according to claim 1, it is characterised in that there is outside described airway and between main pipeline inwall gap, this gap be pendular ring pass through gap.

3. oil well gas production self-measuring device according to claim 1, it is characterised in that also setting up second-stage separator in the bypass pipe of described upside, described airway is connected to second-stage separator front end, and gas volume flow gauge is arranged on the rear of second-stage separator.

4. oil well gas production self-measuring device according to claim 3, it is characterised in that the top of described second-stage separator increases least one set silk screen fine separator.

5. oil well gas production self-measuring device according to claim 3, it is characterised in that described second-stage separator top increases at least one of which drop drainage screen.