CN204461557U - The filtrator boarding device of water injection well in oil fields high-pressure flowmeter on-line proving - Google Patents

Abstract

The utility model relates to the filtrator boarding device of a kind of water injection well in oil fields high-pressure flowmeter on-line proving, it is characterized in that, the filter core in filtrator is removed by dismounting seal flange, an eddy currents proving flowmeter is installed in former filter core position or the replacing structure that connects commercial standard flowmeter is installed, the high-pressure flowmeter of now water distributing station water supply by supplying each well head after the proving flowmeter in this boarding device; At this moment just online having demarcated fast and accurately can be carried out to water injection well in oil fields high-pressure flowmeter.

Description

The filtrator boarding device of water injection well in oil fields high-pressure flowmeter on-line proving

Technical field

The utility model relates to flow meter calibration technology, particularly a kind of servicing unit to the on-line proving of water injection well in oil fields high-pressure flowmeter.

Background technology

The well head of water injection well in oil fields is generally all provided with water distributing station, as shown in Figure 1.After water distribution branch line enters water distributing station, through filtrator, by different high-pressure flowmeters to each well water filling.For obtaining higher oil recovery quality and efficiency, the water injection rate of each injection point must strictly control.For this reason, high-pressure flowmeter must be demarcated once at interval for three months, accurate to ensure its flow.Common way, after being split out from water distribution flow process by high-pressure flowmeter, delivers to standard detection platform and demarcate.This method energy flow meter carries out accurate calibration, but often causes flowmeter to lose efficacy because continuing when flowmeter returns installation to ensure sealing, causes any property loss and manpower waste.(slightly change because different work block bottom characteristic is different) between the water injection pressure 15-20MPa that reason is water distributing station, when high-pressure flowmeter sealing property after dismounting declines.The design improving flowmeter can address this problem, but the replacing of the well head flowmeter of the existing a large amount of water injection well in oil field is then quite huge investment.Directly discharge water from high-pressure flowmeter and also can demarcate, but troublesome poeration, reliability is low, also easily causes environmental pollution.The problem of calibrating of these flowmeters is urgently to be resolved hurrily.

Summary of the invention

Problem to be solved in the utility model be to provide a kind of without the need to dismantling flowmeter, can not cause that environmental pollution just can be carried out accurately the high-pressure flowmeter of wellhead of water injection well, the servicing unit of on-line proving easily.

For reaching above object, the utility model takes following technical scheme to be achieved:

The filtrator boarding device of a kind of water injection well in oil fields high-pressure flowmeter on-line proving, it is characterized in that, the filter core in filtrator is removed by dismounting seal flange, the core body of an eddy currents proving flowmeter is installed in former filter core position, be provided with sealing bottom this core body and connect dish, core body upper end is connected with filter inlet, this core body inner flow passage is provided with eddy generator and vortex street sensor, flow signal connects the gauge outfit of dish input filter outside by the sealing bottom core body, and core body bottom is provided with the by-pass port being communicated with filter outlet.

In such scheme, described core body upper end and filter inlet junction are provided with inlet seal.

The filtrator boarding device of another kind of water injection well in oil fields high-pressure flowmeter on-line proving, it is characterized in that, the filter core in filtrator is removed by dismounting seal flange, water pipe sealing is set out at the filter inlet of former filter core upper end, install new seal flange in former seal flange position, novel sealing flange is provided with rising pipe and return pipe; Wherein rising pipe is sealed with rising pipe by former filtration cartridge volume and is connected; Return pipe is communicated with filter outlet, and rising pipe water outlet and return pipe install commercially available proving flowmeter between intaking.

Compared with prior art, the utility model has the advantages that, without the need to dismantling the high-pressure flowmeter in water distribution flow process, also can not discharge water from high-pressure flowmeter and cause environmental pollution, just utilize former filtrator carry out simple structure of modification just can carry out fast the high-pressure flowmeter of wellhead of water injection well, accurately, on-line proving easily, and it is easy to recover flow process, not only energy-saving and emission-reduction, but also significantly reduce calibration cost.

Accompanying drawing explanation

Fig. 1 is the general flow schematic diagram of existing water distributing station.

Fig. 2 is for adopting water distributing station schematic flow sheet of the present utility model.

Fig. 3 is the inner structure of conventional filters 5 in Fig. 1.

Fig. 4 is a kind of structure of the utility model installation code flowmeter on Fig. 3 filtrator.

Fig. 5 is the another kind of structure of the utility model installation code flowmeter on Fig. 3 filtrator.

In Fig. 1 to Fig. 5: 1, injection point; 2, high-pressure flowmeter; 3, water distribution branch line; 4, feed water valve; 5, filtrator; 6, proving flowmeter; 7, filter inlet; 8, filter outlet; 9, filter core; 10, seal flange; 11, inlet seal; 12, proving flowmeter core body; 13, vortex street sensor; 14, by-pass port; 15, sealing connects dish; 16, eddy generator; 17, rising pipe sealing; 18, rising pipe; 19, return pipe; 20, novel sealing flange.

Embodiment

Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.

Embodiment 1

With reference to figure 2 Fig. 3 and Fig. 4, the filter core 9 in filtrator 5 is removed by dismounting seal flange 10, the core body 12 of an eddy currents proving flowmeter 6 is installed in former filter core position, be provided with sealing bottom this core body and connect dish 15, core body upper end is connected with filter inlet 7 by an inlet seal 11, guarantees that the water under high pressure entering filtrator all flows in core body; This core body inner flow passage is provided with eddy generator 16 and vortex street sensor 13, flow signal connects the gauge outfit of dish 15 input filter outside by the sealing bottom core body, core body bottom is provided with the by-pass port 14 being communicated with filter outlet 8, and water under high pressure is flowed out from filter outlet 8 by the by-pass port 14 of core body bottom.

Embodiment 2

With reference to figure 2 Fig. 3 and Fig. 5, the filter core 9 in filtrator is removed by dismounting seal flange 10, set out water pipe sealing 17 at the filter inlet 7 of former filter core upper end, install new seal flange 20 in former seal flange position, novel sealing flange is provided with rising pipe 18 and return pipe 19; Wherein rising pipe is sealed with rising pipe by former filtration cartridge volume and is connected, and guarantees that the water under high pressure of inflow filter all flows out from rising pipe; Return pipe is communicated with filter outlet 8, and rising pipe water outlet and return pipe install commercially available proving flowmeter between intaking, and water under high pressure flows back to filtrator from return pipe after proving flowmeter, flow out from filter outlet.

With reference to figure 2, relate to the method for water injection well in oil fields high-pressure flowmeter of the present utility model on-line proving, comprise the following steps:

One, workflow reengineering

First the feed water valve 4 on closedown water distribution branch line 3 and the valve of high-pressure flowmeter 2, then remove the filter core 9 in filtrator 5 by dismounting seal flange 10; At any one boarding device of former filter core position installation diagram 4 or Fig. 5, now water distribution branch line supplies water by the high-pressure flowmeter 2 of each well head of supply after proving flowmeter 6.

Two, demarcate

Progressively open water distributing station feed water valve 4, except by except proving flowmeter, close the valve of other each road high-pressure flowmeter; Regulate by the flow of absolute altitude pressure type flowmeter, get and once effectively measure under each flow, after effectively measuring for N time, the flow modificatory coefficient of this high-pressure flowmeter is

$K=\frac{\underset{i=2}{\overset{N}{\mathrm{\Σ}}}\frac{Q_i-Q_{i-1}}{q_i-q_{i-1}}}{N-1};$

In formula, K is flow regulation coefficient, adjusts the gauge outfit coefficient of this high-pressure flowmeter according to this flow regulation coefficient; Q _ifor i-th measured value of proving flowmeter 6; q _ifor i-th displayed value of measured stream gauge; N is overall measurement number of times.After this flow meter calibration completes, close the valve of this flowmeter, and open the next one and treat target flowmeter valve, repeat step 2, until complete the demarcation of all online flowmeters.

Three, flow process is recovered

Proving flowmeter 6 is removed from filtrator, loads onto filter core 9, recover the original structure of filtrator, and recover water distributing station water filling flow process, recover normal water filling operating mode (Fig. 1).

Claims (2)

1. the filtrator boarding device of water injection well in oil fields high-pressure flowmeter on-line proving, it is characterized in that, the filter core in filtrator is removed by dismounting seal flange, the core body of an eddy currents proving flowmeter is installed in former filter core position, be provided with sealing bottom this core body and connect dish, core body upper end is connected with filter inlet, this core body inner flow passage is provided with eddy generator and vortex street sensor, flow signal connects the gauge outfit of dish input filter outside by the sealing bottom core body, and core body bottom is provided with the by-pass port being communicated with filter outlet.

2. the filtrator boarding device of water injection well in oil fields high-pressure flowmeter on-line proving as claimed in claim 1, it is characterized in that, described core body upper end and filter inlet junction are provided with inlet seal.