CN1632514A

CN1632514A - Device for measuring density and constituent containing rate of mixed fluid

Info

Publication number: CN1632514A
Application number: CN 200410073546
Authority: CN
Inventors: 仇小琦
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-30
Filing date: 2004-12-30
Publication date: 2005-06-29

Abstract

It is a device to measure the density and its element rate of the mixed flow, which comprises level tube, vertical tube, pressure meter, and date process system. The vertical tube and level tube are cascade or parallel connection, both having a pair of collection points; the pressure meter is fixed at the collection points and is connected with the data process system. The invention is suitable to the on-line measurement of the mixed flow density and its element rate under different working conditions and is widely used in petrol, chemical, environment fields.

Description

Measure the density of fluid-mixing and the device of constituent element containing ratio

Technical field

The present invention relates to the device of a kind of on-line measurement fluid density, composition, is a kind of density of crude oil in the pipe laying and device of water percentage measured specifically.

Technical background

In the production management work of crude oil extraction, is one of problem that the decision maker must think better of: scheme how to determine oil extraction? how to guarantee oil field high yield steady in a long-term? how the reasonable development oil field, improve ultimate recovery factor? and one of key that addresses these problems is, situations such as the hybrid density of necessary grasp extraction crude oil and component containing ratio thereof, so that the composition of potpourris such as oil, water, rock gas and the composition of content in the based on crude are made and being analyzed and judgement.For a long time, the gage work of crude oil in China component is continued to use the method for manual metering always, that is, get a small amount of crude oil and be contained in the knockout drum, rely on the different specific weight of gas and liquid (oil water mixture), gas and fluid separation applications are opened, then with artificial method metering gas, liquid measure; The water percentage of crude oil then adopts the method for hand sampling chemical examination to record.The shortcoming of this human metering method is: not only need great amount of manpower and numerous and jumbled metering and assay device, the more important thing is, owing to can not long-time continuous measure and on-line metering, therefore can not in time reflect the situation of change that oil well is fuel-displaced, cause measurement data imperfect, inaccurate, particularly under the unsettled situation of Oil, Water, Gas output in oil well, often there is bigger deviation in the numerical value that this manual method measures, the actual conditions that can not reflect oil well production are difficult to make correct judgement.

Summary of the invention

The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of density of on-line measurement fluid-mixing and new method, the new equipment of component containing ratio thereof are provided.

The present invention mainly is made up of VERTICAL TUBE, horizontal tube and pressure measuring instruments, signal processing system.One end of VERTICAL TUBE and horizontal tube is interconnected and is 90 ° ± 10 ° angles; One group of two collection point that are used for measured pressure signal is respectively arranged on VERTICAL TUBE and the horizontal tube, and the distance of every group of collection point is all greater than 200mm; Four pressure measuring instruments are installed in respectively on four signal acquisition point, and are connected with the disposal system circuit.Connected mode between VERTICAL TUBE and the horizontal tube can be that head and the tail are connected in series between VERTICAL TUBE and horizontal tube, and fluid-mixing flows to from an end of this tandem tube, flows out from the other end; Connected mode between VERTICAL TUBE and the horizontal tube also can be being connected in parallel between VERTICAL TUBE and the horizontal tube, and fluid-mixing flows to from its junction, from the not end outflow of parallel transistor.Pressure measuring instruments will be sent to from the signal that VERTICAL TUBE, horizontal tube are gathered the signal processing system, after automation data is handled, just show automatically.

The present invention can on-line measurement goes out the composition and the content of fluid-mixing, has automatically, provides accurately, in time, at any time the advantage of measurement result, has saved manpower and materials greatly, has improved work efficiency, has guaranteed the reliability of measurement data.The present invention is widely used in the fluid measurement work in fields such as oil, chemical industry, environmental protection, have simple in structure, cheap, measure accurately and advantages such as safety non-pollution.On the collection point, and with

Description of drawings

Accompanying drawing 1, tandem one-piece construction synoptic diagram (during the fluid forward flow);

Accompanying drawing 2, tandem one-piece construction synoptic diagram (during reverse fluid flow);

Accompanying drawing 3, parallel one-piece construction synoptic diagram;

Accompanying drawing 4, the circuit structure block diagram.

Among the figure, the 1st, VERTICAL TUBE, the 2nd, horizontal tube, 3,4,5,6 is respectively four pressure measuring instruments, the 7th, direction of flow, the 8th, signal processing system.

Embodiment

Below in conjunction with three embodiment of accompanying drawing narration, the present invention is further described.

1, one of embodiment mixing material in series-mode frame is the measurement mechanism of forward flow.

As Fig. 1, shown in Figure 4.This device is in series by VERTICAL TUBE 1, horizontal tube 2, and is the vertical connection of 90 degree, and the length of horizontal tube, VERTICAL TUBE is 800mm, and internal diameter is 32mm.Direction of flow 7 flows to along the port of horizontal tube, from the port outflow of VERTICAL TUBE.Four

pressure measuring instruments

3,4,5,6 adopt piezoresistive pressure sensors, be installed in respectively on four collection point B1, B2 on horizontal tube and the VERTICAL TUBE, A1, the A2, between A1, the A2 and the distance between B1, the B2 be 400mm.Signal processing system 8 adopts industrial control computer, and is connected with four pressure measuring instruments, 3,4,5,6 circuit.

When the present invention worked, circuit part carried out with following program:

1) fluid-mixing is out-of-date in VERTICAL TUBE, flow in horizontal pipe, is installed in four

pressure measuring instruments

3,4,5,6 on the tube wall respectively at collection point B ₁, B ₂, A ₁, A ₂The place obtains pressure signal p ₁, p ₂, p ₃, p ₄

2) then, calculate VERTICAL TUBE pressure differential Δ P by signal processing system _B=p ₁-p ₂With horizontal tube pressure differential Δ P _A=p ₃-p ₄

3) the pressure differential Δ P that when VERTICAL TUBE 1 and horizontal tube 2 flow through, produces according to fluid-mixing of signal processing system _BWith Δ P _A, calculate the density p and the constituent element containing ratio x of fluid-mixing:

ρ = \frac{{ΔP}_{B} - {ΔP}_{A}}{gh}

x＝k(ΔP _B-ΔP _A)

In the formula: g is an acceleration of gravity

H is collection point B ₁, B ₂Between distance

K is a coefficient of colligation, determines according to factors such as the temperature of detected fluid, viscosity, density.

2, one of embodiment fluid-mixing in series-mode frame is the measurement mechanism of reversed flow.

As Fig. 2, shown in Figure 4.This measurement mechanism is basic identical with the foregoing description 1, and difference only is that the flow direction of flow direction 7 in tandem tube of mixing material is opposite with embodiment 1, and promptly flow direction is: VERTICAL TUBE-→ horizontal tube.

The fluid-mixing measurement mechanism of 3, one parallel structures of embodiment.

As shown in Figure 3, Figure 4.This measurement mechanism is basic identical with the foregoing description 1, and difference only is: the flow direction 7 of mixing material enters from the junction of VERTICAL TUBE 1 and horizontal tube 2, from two ports outflows of stretching out of parallel transistor.

Claims

1. measure the density of fluid-mixing and the device of constituent element containing ratio, it is characterized in that: by VERTICAL TUBE (1), horizontal tube (2), pressure measuring instruments (3,4,5,6) and signal processing system (7) are formed, being serial or parallel connection between VERTICAL TUBE and the horizontal tube is connected, one group of collection point that is used for measured pressure signal is respectively arranged on VERTICAL TUBE and the horizontal tube, and pressure measuring instruments is installed in respectively on four collection points and with signal processing system (8) circuit and is connected.

2. according to the density of the said measurement fluid-mixing of claim 1 and the device of constituent element containing ratio, it is characterized in that: on VERTICAL TUBE (1) and the horizontal tube (2) one group of collection point that is used for measured pressure signal is arranged respectively, there are two (B every group of collection point ₁, B ₂) and (A ₁, A ₂), the distance between every group of two collection point is all greater than 200 millimeters.

3. according to the density of the said measurement fluid-mixing of claim 1 and the device of constituent element containing ratio, it is characterized in that: the angle between VERTICAL TUBE (1) and the horizontal tube (2) is 90 ° ± 10 °.

4. according to the density of the said measurement fluid-mixing of claim 1 and the device of constituent element containing ratio, it is characterized in that: when VERTICAL TUBE (1) and horizontal tube (2) are when being connected in series, two ports of feed liquor and fluid are positioned at the two ends of this device,

5. according to the density of the said measurement fluid-mixing of claim 1 and the device of constituent element containing ratio, it is characterized in that: when VERTICAL TUBE (1) and horizontal tube (2) are when being connected in parallel, fluid intake is positioned at the junction of these two pipes, and fluid egress point lays respectively at the external part of VERTICAL TUBE (1) and horizontal tube (2).