CN201277023Y

CN201277023Y - Steam allotter

Info

Publication number: CN201277023Y
Application number: CNU2008201225411U
Authority: CN
Inventors: 孙晓辉; 万仲; 王予新; 葛涛涛
Original assignee: China National Petroleum Corp; China National Petroleum Corp Engineering Design Co Ltd
Current assignee: China National Petroleum Corp; China National Petroleum Corp Engineering Design Co Ltd
Priority date: 2008-09-18
Filing date: 2008-09-18
Publication date: 2009-07-22
Anticipated expiration: 2018-09-18

Abstract

A steam distributor is applied to heavy oil production with steam injection in oil fields. A main body is a high pressure container formed by welding an upper shell, a middle barrel and a lower shell. The steam distributor is characterized in that 4-12 branch pipes are welded in the center of the main body and the branch pipes are uniformly distributed around the main body. The central lines of the branch pipes radiate, a main pipe is welded in the top center of the upper shell, a flange is welded on the top of the main pipe, and a spiral flow-guide mixing core is fixed in a channel formed by the main pipe and the flange. The steam distributor has the advantages that by means of the cyclonic hypergravity action, the particular flow action of the multiphase flow system strengthens the relative speed and the contact among phases, thereby highly-effective heat and mass transfer procedures are realized and water enters the branch pipes of each well after being distributed evenly. The moisture content of the steam injected in each well is identical, thereby achieving satisfied economic benefit. Further, the equipment pipelines have low cost, the steam distributor covers a small area, the installation and the usage are simple and convenient, and the service life is long.

Description

Steam distributor

Technical field

The utility model relates to oil-field thick-oil exploitation via steam injection technical field, and particularly the ground injecting gas equipment in the thick oil steam drive recovery process is to steam the steam distributor of by-pass line distributing steam from a plurality of notes of steam main pipe alignment.

Background technology

Viscous crude field exploitation difficulty is big, and the steam flooding exploitation method viscous crude is taked in many oil fields, has obtained more satisfactory effect.A steam production station need provide high steam for many mouthfuls of wells.Usually the steam production station delivers a vapor to the zone that oil well is concentrated by a steam trunk pipeline, and each steamed well is connected to annotate and steams on the by-pass line, supplies with steam by the trunk pipeline through each by-pass line.Reasonably distribute to become and improve heavy crude heat extraction effect, the key technology of increasing economic efficiency injecting saturated vapor in the oil well.

What at present, the tie point of steam trunk pipeline and by-pass line adopted is a kind of straight threeway.This three are connected with an inlet and two outlets.Because two outlets are structurally asymmetric with respect to inlet, cause before and after the steam distribution mass dryness fraction seriously inhomogeneous, cause and inject each well steam water content and differ bigger, make uncontrollable steam injection rate, influence oil well output, influence the general effect of block steam injection.

What the present steam injection of the U.S. was used is " dead end threeway " and steam-distributing system.The dead end threeway is two-phase steam to be changed by side arm flow into, two straight-arms flow out, improved threeway etc. mass dryness fraction distribute performance, inlet in the dead end threeway installs the pre-separation dividing plate additional or installs the deceleration jet pipe additional in outlet, further strengthened superheated steam etc. mass dryness fraction distribute, though the dead end threeway has increased the longer pipe line and inserted device than the straight threeway, the expense of this equipment installation is very high, and floor space is very big.

Domestic also have a kind of main line steam impringement spheroid, its structure is to comprise a spherosome in the outer pressure vessel, the outer pressure vessel periphery connects steam inlet and each branch line, be mainly and pass through pipeline, superheated steam impacts the interior spheroid external surface, moisture in the steam is mixed, impacting spheroid can make the moisture in the steam be evenly distributed to the by-pass line of respectively annotating the vapour well, its distribution effects is undesirable, simultaneously, the pressing force container manufactures and designs, and the workload of its annual test is very big, is restricted in application process.

Summary of the invention

The purpose of this utility model provides a kind of steam distributor, trunk pipeline and by-pass line are connected on the steam distributor, can realize by the trunk pipeline being that a plurality of by-pass lines are supplied with steam, and the steam quality in each by-pass line is basic identical, be uniform distribution steam, reach the purpose of the recovery ratio of the gas oil ratio that improves thermal recovery and crude oil.The expense that overcomes present steam injection pipeline is very high, and floor space is very big, the deficiency of steam quality maldistribution.

The technical solution adopted in the utility model is: steam distributor comprises main body, is responsible for branched pipe and spiral stream guidance mixed core.Main body is the high-pressure bottle that is welded into by upper shell, middle tube and lower house.It is characterized in that: be welded with 4～12 branched pipes at the main body middle part.Branched pipe evenly distributes around main body, the branched pipe center line to around be radial.

Be welded with the person in charge in the upper shell top center.In the welded top of being responsible for flange is arranged.In the passage of the person in charge and flange composition, be fixed with a spiral stream guidance mixed core.When superheated steam by flange with when being responsible for, superheated steam promotes the rotation of spiral stream guidance mixed core, through the effect of eddy flow hypergravity, the mass dryness fraction of superheated steam and water content is mixed.When superheated steam enters branched pipe, the superheated steam mass dryness fraction of passing through in each branched pipe is identical with water content.Each branched pipe connects a by-pass line, and each by-pass line is connected to a bite well mouth of oil well, injects the down-hole by by-pass line for heavy oil wells provides high steam.

For the steam quality distributed uniform, the center line of described 4～12 branched pipes is on same plane.The plane that the center line of being responsible for is formed perpendicular to the branched pipe center line.

The end of the welding ends of described branched pipe is a circular arc, and the radius of circular arc is identical with the inner surface radius of middle tube.

Described spiral stream guidance mixed core, there is fixed cover at two ends, there is bearing at the fixed cover center, spiral stream guidance mixed core two ends are fixed on the bearing, following fixed cover is fixed on is responsible for the inwall lower end, and last fixed cover is fixed on the flange inner wall upper end, on fixed cover and the last fixed cover high steam passage is being arranged down, the high steam passage is a cylindrical hole, is distributed in around the bearing.

The beneficial effects of the utility model: the utility model steam distributor, with of the effect of main line steam by the eddy flow hypergravity, unique flow behavior of multiphase flow system, strengthen relative velocity between phase and phase and be in contact with one another, thereby realize mass-and heat-transfer process efficiently, moisture distribution evenly after, enter each well by-pass line.The steam water content of each well branch line of energy uniform distribution; It is identical to realize injecting each well steam water content, reaches the purpose of control actual steam injection rate.Thereby obtain satisfied economic benefit.The expense of equipment installation is low, and floor space is little; Install and use succinct convenience; Long service life.

Description of drawings

Fig. 1 is the utility model steam distributor structural profile schematic diagram.

Fig. 2 is 1 drawing in side sectional elevation.

Among the figure, 1. flange, 2. the spiral stream guidance mixed core 3. is responsible for, 4. upper shell, 5. branched pipe, 6. in tube, 7. lower house.

The specific embodiment

Embodiment 1: with an inner major diameter is that 450 millimeters steam distributor is an example, and utility model is described in further detail.

Consult Fig. 1.The utility model steam distributor comprises main body, is responsible for 3 branched pipes 5 and spiral stream guidance mixed core 2.Main body is the high-pressure bottle that is welded into by upper shell 4, middle tube 6 and lower house 7.Upper shell 4 and lower house 7 are that wall thickness is 38 millimeters rammed cabochons of steel plate; Middle tube 6 is that internal diameter is 450 millimeters a steel cylinder, 38 millimeters of wall thickness, 176 millimeters of height.

Consult Fig. 2.At main body middle part, promptly in tube 6 in be welded with 12 branched pipes 5.The internal diameter of branched pipe is 65 millimeters.12 branched pipes 5 evenly distribute around middle tube 6, branched pipe 5 center lines to around be radial.The center line of 12 branched pipes 5 is on same plane.The end of the welding ends of branched pipe 5 is a circular arc, and the radius of circular arc is identical with the inner surface radius of middle tube 6.

Consult Fig. 1.Be welded with one in upper shell 4 top center and be responsible for 3.The person in charge 3 internal diameter is 100 millimeters.The plane that the person in charge 3 center line is formed perpendicular to branched pipe 5 center lines.In the welded top of being responsible for 3 flange 1 is arranged.In the passage of the person in charge 3 and flange 1 composition, be fixed with a spiral stream guidance mixed core 2.

Described spiral stream guidance mixed core 2, there is fixed cover at two ends, and there is bearing at the fixed cover center, and spiral stream guidance mixed core 2 two ends are fixed on the bearing.Following fixed cover is fixed on is responsible for 3 inwall lower ends, and last fixed cover is fixed on flange 1 inwall upper end.On fixed cover and the last fixed cover high steam passage is being arranged down.The high steam passage is a cylindrical hole, is distributed in around the bearing.

Claims

1, a kind of steam distributor, comprise main body, the person in charge (3) branched pipe (5) and spiral stream guidance mixed core (2), main body is the high-pressure bottle that is welded into by upper shell (4), middle tube (6) and lower house (7), it is characterized in that: be welded with 4～12 branched pipes (5) at the main body middle part, branched pipe (5) evenly distributes around main body, branched pipe (5) center line to around be radial;

Be welded with the person in charge (3) in upper shell (4) top center, flange (1) arranged, in the passage of being responsible for (3) and flange (1) composition, be fixed with a spiral stream guidance mixed core (2) in the welded top of being responsible for (3).

2, steam distributor according to claim 1 is characterized in that: the center line of described 4～12 branched pipes (5) is responsible for the plane of the center line of (3) perpendicular to branched pipe (5) center line composition on same plane.

3, steam distributor according to claim 1 is characterized in that: the end of the welding ends of described branched pipe (5) is a circular arc, and the radius of circular arc is identical with the inner surface radius of middle tube (6).

4, according to claim 1,2 or 3 described steam distributors, it is characterized in that: described spiral stream guidance mixed core (2), there is fixed cover at two ends, there is bearing at the fixed cover center, and spiral stream guidance mixed core (2) two ends are fixed on the bearing, and following fixed cover is fixed on the person in charge (3) inwall lower end, last fixed cover is fixed on flange (1) inwall upper end, on fixed cover and the last fixed cover high steam passage is being arranged down, the high steam passage is a cylindrical hole, is distributed in around the bearing.