CN201170088Y

CN201170088Y - Filtering components of V type accurate micro-seam self-cleaning sand control screen

Info

Publication number: CN201170088Y
Application number: CNU2008201013812U
Authority: CN
Inventors: 詹其国
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-02-04
Filing date: 2008-02-04
Publication date: 2008-12-24
Anticipated expiration: 2018-02-04

Abstract

The utility model discloses a filter assembly for a V-shaped precise micro-slit self-cleaning sand prevention sieve tube, belonging to the mechanical sand prevention device for oil extraction of the petroleum industry. A V filter member assembly is embedded into a V-shaped through hole groove on the wall of a branch pipe of the V-shaped precise micro-slit self-cleaning sand prevention sieve tube. The filter member assembly consists of a plate-shaped filter member and a protective cover. Since the filter assembly consists of a plurality of filter members and the protective cover, the width of the micro-slit of the pitch micro-slit gap is formed by the sand grain size of a ground layer or is determined by the requirements of a user. The formed pitch micro-slit gap is of a structure adopting a small outer side and a large inner side so that the sand grains which are allowed to be sucked can enter a channel and do not block the opening, and thus the sieve tube has the self-cleaning function and can not be blocked. Additionally, the filter assembly forms a plurality of micro-slit pitch gaps so that the circulation area is enlarged. Such micro-slit size can meet the requirement of oil extraction to the utmost extent. The filter member assembly is arranged in a plurality of grooves of the branch pipe so that the filter member is integrated with the branch pipe and the strength of the sand prevention tube is improved.

Description

The filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type

Technical field

The utility model relates to the mechanical sand retention device of petroleum industry oil extraction, the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of specifically V-type.

Background technology

At present, the mechanical sand retention device in the oil extraction of petroleum industry, mainly based on cutting seam sieve tube and wire-wrapped screen:

One, cutting seam sieve tube is shaped, and must to use machining, machinery can only process minimum slot width be 0.5mm, so it is restricted the sand control of powder fine sand, and the cutting seam sieve tube circulation area can only be in wire-wrapped screen 1/8～/ 10.Outer little interior big gradient break joint can not be processed in the processing slit of cutting seam sieve tube, does not reach self-cleaning function, and clogging is arranged in filter process.The slot of cutting seam sieve tube is directly to process on arm, and arm generally is a structural carbon steel, and poor corrosion resistance, especially gap size corrosion-vulnerable and increase shorten the sand control life.

Two, the comparison of wire-wrapped screen and cutting seam sieve tube, just select full welding scale steel wire-wrapped screen, selection in domestic 1CR18Ni9Ti stainless steel wire is a raw material, be rolled into the wrapping wire and the vertical muscle of the triangular-section of certain size, in winding process, each intersection contact point of wrapping wire and vertical muscle all welds together with electric resistance welding, make screen casing form integral body with certain intensity, flat by certain-length requirement two end-grain cutting, the box cupling of burn-oning, box cupling and vertical muscle weld from the screen pipe sleeve inner radius (notices that this work must not be careless, in order to avoid influence the screen casing bulk strength), at machine and polishing box cupling internal diameter postwelding, the hole central tube is gone into sieve, again screen casing two ends box cupling is welded on the central tube.Its shortcoming is a complex process, the time-consuming money of taking, cost height (being generally 2～3 times of slot pipes) task difficulty is big, and clogging is arranged, application life is short, and the also uncomfortable arm that embeds after filter assemblies is assembled is connected the lower end that can be linked into petroleum pipeline again and has recovered the oil with box cupling.

Show from the interrelated data retrieval that comprises Chinese patent, most representative in the Chinese patent at present " the anti-sandpipe of ring plate combination " (02281551.1), it is characterized in that: filter area is big, and can delay the obstruction cycle, but also have complex structure, shortcomings such as cost height.And " the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type " (200510052088.2) of inventor's invention, through facts have proved its complex structure processing difficulties, the actual circulation area is also not ideal enough, therefore must improve.

The utility model content

For overcome in the prior art the high and cutting seam sieve tube of wire-wrapped screen cost can not be self-cleaning etc. defective, the purpose of this utility model is to be provided at the former invention of the inventor " the annular fine motion sand control screen that has sheath V line of rabbet joint crack ", the patent No.: on 200620006991.5 the basis, the filter core of wriggling in the middle of the filter assemblies is proposed the further improved slit gap that has, can increase the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of novel V-type of the self-cleaning function of circulation area again.

The technical scheme that its technical problem that solves the utility model adopts is: the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type; it is characterized in that: embedding in the V-arrangement through-hole groove of branch pipe wall has V filtration members assembly, and the filtration members assembly is made up of sheet filtration members and protective cover.

Described sheet filtration members has 2～30.

Described filtration members thickness is 0.3～3mm; One side is the plane, and another side is provided with two skewed slots, and the skewed slot width is 5～15mm;

Two skewed slot degree of depth of described filtration members are 0.01～1mm, and gradient is 0.01～15 degree;

The centre that described filtration members is adjacent two be provided with outside the Zhi Guanbi direction little in big gradient slit gap, gap width is 0.01～1mm.

Two of filter assemblies after the described combination are R shape circular arc, and consistent with V-shaped groove two limit circular arc R;

Two after the described filter assemblies combination for having oblique breach on the R shape circular arc.

Arm after the utility model is assembled through the embedding filtration members is connected the lower end that just can be linked into petroleum pipeline again and has recovered the oil with box cupling.

The beneficial effects of the utility model are: because filter assemblies of the present utility model is made up of several pieces filtration members and protective cover, wherein the slit width in gradient slit gap can be determined according to stratum fineness of sand composition or customer requirements.Therefore, the formation gradient slit gap behind the composition is owing to adopt outer greatly in little, and the sand grains that is inhaled into for permission like this can enter in the pipeline and can not get lodged on the mouth again, thus have self-cleaning function, and accomplish not stop up.Also therefore, improved the life-span of its use greatly.In addition, many slit gradient gaps that filter assemblies of the present utility model forms can make circulation area enlarge, and such slit size can satisfy the oil recovery requirement to greatest extent.Secondly, the filtration members component groups is contained in several grooves of arm, makes a filtration members and a pipe jointing form integral body, has increased anti-sandpipe intensity.Therefore, the utility model can reach the purpose of drafting.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is the structural representation of the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of the utility model V-type.

Fig. 2 is a sheet filtration members view.

1 filtration members assembly among the figure, 2 filtration members, 3 protective covers.

The specific embodiment

Embodiment 1:

See also Fig. 1～Fig. 2, embedding in the V-arrangement through-hole groove of branch pipe wall has V filtration members assembly 1, and filtration members assembly 1 is made up of sheet filtration members 2 and protective cover 3.

Claims

1, the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type is characterized in that: embedding in the V-arrangement through-hole groove of branch pipe wall has V filtration members assembly, and the filtration members assembly is made up of sheet filtration members and protective cover.

2, the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type according to claim 1, it is characterized in that: described sheet filtration members has 2～30.

3, the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type according to claim 1, it is characterized in that: described filtration members thickness is 0.3～3mm; One side is the plane, and another side is provided with two skewed slots, and the skewed slot width is 5～15mm.

4, the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type according to claim 1, it is characterized in that: two skewed slot degree of depth of described filtration members are 0.01～1mm, gradient is 0.01～15 degree.

5, the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type according to claim 1 is characterized in that: the centre that described filtration members is adjacent two be provided with outside the Zhi Guanbi direction little in big gradient slit gap, gap width is 0.01～1mm.

6, the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type according to claim 1 is characterized in that: two of the filter assemblies after the described combination are R shape circular arc, and consistent with V-shaped groove two limit circular arc R.

7, the filter assemblies of the accurate slit self-cleaning sand-proof screen pipe of a kind of V-type according to claim 1 is characterized in that: two after the described filter assemblies combination for having oblique breach on the R shape circular arc.