CN102108849B - Balance screen pipe - Google Patents
Balance screen pipe Download PDFInfo
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- CN102108849B CN102108849B CN200910243109.7A CN200910243109A CN102108849B CN 102108849 B CN102108849 B CN 102108849B CN 200910243109 A CN200910243109 A CN 200910243109A CN 102108849 B CN102108849 B CN 102108849B
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- flowing hole
- restriction choke
- choke
- supporting disk
- axial
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Abstract
The invention provides a balance screen pipe comprising a liquid channel which is a base pipe, a composite filter sleeve component, and a radial rotation and axial flow-limit type throttler. The throttler is used for controlling the flow of liquid in a liquid channel, and comprises a throttler body and a throttle support disc, wherein the throttler body is provided with an axial liquid passing piece. The composite filter sleeve component and the throttler are coaxially sleeved outside the base pipe; and the composite filter sleeve component comprises an inner protective sleeve, a plurality of layers of filter nets, and an outer protective sleeve. By radially rotating the throttler body, the number of communicated axial liquid passing holes is adjusted, and the aim of limiting the flow is easy to fulfill.
Description
Technical field
The invention belongs to fluid flow equilibrium device technique field, relate to a kind of balancing sieve tube, particularly relate to a kind of balancing sieve tube containing radial rotary axial current-limiting type restriction choke.
Background technology
In oil, gas exploitation course, balancing sieve tube extends the downhole production device of the balanced pressure drop of net horizontal section as sand control filtration and flow restriction control, it can suppress Di Shui and limit water water ridge to move unbalanced phenomenon, thus realize playing the production capacity of whole horizontal segment, extending the object in the life-span of horizontal well, finally make oil well reach maximum economic benefit.
There are problems in horizontal wells process, the subject matter particularly existed in horizontal well limit, bottom-water reservoir development process is in two: one is bottom water coning problem, and another is oil-gas reservoir production capacity problem.
Disclose a kind of balance-type screen casing in prior art, this balance-type screen casing is made up of restriction choke, cartridge filter and center base tube.In above-mentioned restriction choke, flow control device structure is made up of a unique screw type circulation groove, its as control element for shunting the pressure distribution along whole net horizontal section.Although this balance-type screen casing, while guaranteeing to regulate output flow, also improves the reliability of oil well production, its technological deficiency existed is: 1, screw type runner easily causes blocking; 2, well data must be obtained in advance to design runner, thus form fixing form, be unfavorable for the adjustment at oil well production scene; 3, product structure is complicated, is unfavorable for processing.
Summary of the invention
The object of the present invention is to provide a kind of balancing sieve tube containing radial rotary axial current-limiting type restriction choke, the flow passage part in this restriction choke be rational in infrastructure, be convenient to processing, at the scene during construction by simple operations, just can the size of adjusted flow very like a cork; Filtration fraction in this balancing sieve tube have employed monolithic construction, its filter screen is rolled into cylindrical shape by flaky material and by two edges partial stack and being formed in addition, without the need to welding, any damage can not be caused to filter screen, therefore, it is possible to meet the actual needs of different exploitation of oil-gas field, be beneficial to overcome above-mentioned defect existing in prior art.
To achieve these goals, the invention provides a kind of radial rotary axial current-limiting type restriction choke, it is for controlling the fluid flow of fluid passage, this restriction choke comprises restriction choke body and first throttle device supporting disk and second choke supporting disk, and this first, second restriction choke supporting disk is arranged at the two ends of restriction choke body respectively; Wherein: this second choke supporting disk comprise be located on dish end face for importing crossing chute, multiple first axial flowing hole and will the annular space that is communicated with described first axial flowing hole of chute being crossed of fluid; Described restriction choke body, the contiguous end face being provided with the second choke supporting disk of described first axial flowing hole is also provided with multiple second axial flowing hole, and described second axial flowing hole is communicated with the annular space of restriction choke body; Described first axial flowing hole makes conducting or cut-off between the two with described second axial flowing hole in the mode of aliging or stagger.
According to above-mentioned conception, between this first throttle device supporting disk and this restriction choke body, be provided with locking device.
According to above-mentioned conception, in described second axial flowing hole, stud with corrosion-resistant erosion resistant lining.
According to above-mentioned conception, restriction choke body is provided with graduation mark.
To achieve these goals, the present invention also provides a kind of balancing sieve tube, comprise fluid passage and base tube, combined filtration thimble assembly and restriction choke, the tube wall of described base tube offers multiple 3rd flowing hole, described combined filtration thimble assembly and restriction choke coaxial sleeve are located at the outside of described base tube; Described restriction choke have employed above-mentioned radial rotary axial current-limiting type restriction choke, the annular space conducting of described 3rd flowing hole and restriction choke body.
According to above-mentioned conception, this combined filtration thimble assembly comprises internal protective cover and outer jointing jacket, and is located at the multiple filter screens between interior outer jointing jacket; This internal protective cover is provided with multiple projection, and the part on this internal protective cover except multiple projection is provided with multiple 4th flowing hole; This outer jointing jacket is also provided with multiple 5th flowing hole.
According to above-mentioned conception, described projection is given prominence to towards this base tube, to form annular flow space between this base tube and this combined filtration thimble assembly, and the chute conducting excessively of described annular flow space and restriction choke.
According to above-mentioned conception, described multiple filter screen is rolled into cylindrical shape by flaky material and by two edges partial stack and form cylindrical shape in addition.
According to above-mentioned conception, described projection can helically mode, linear fashion arrangement on internal protective cover.
According to above-mentioned conception, described projection is bridge-type, circle or special-shaped.
Because restriction choke provided by the invention adopts as above structure, when reality uses, such as: when under the occasion this restriction choke being applied to balancing sieve tube, can according to the fuel-displaced situation on stratum, by radial rotary restriction choke body, the number of openings that the axial flowing hole subtend offered of the axial flowing hole regulating the end face of restriction choke body to offer and the dish end face of restriction choke supporting disk is through, controls and regulates switch and the uninterrupted of restriction choke very like a cork, thus realize the object of current limliting.Meanwhile, by relative position that locking device can be guaranteed between restriction choke body and restriction choke supporting disk as back tightening nut effectively.
Radial rotary axial current-limiting type restriction choke of the present invention, wherein, can set up sealing ring between described restriction choke body and described restriction choke supporting disk, to guarantee being sealed and matched between the two.
Owing to have employed combined filtration thimble assembly, filtration fraction is made to be an Integral filtering sleeve structure, so better sand controlling result can be played.
In actual use, crude oil flows into combined filtration thimble assembly from stratum, via the chute excessively of second choke supporting disk, by the first axial flowing hole that second choke supporting disk Annular cutting is offered to the dish end face of second choke supporting disk, again via the annular space of the second axial flowing hole inflow restriction choke body of the end opens of restriction choke body, finally flow into base tube endoporus via the 3rd flowing hole that the tube wall of base tube is offered.
Below, in conjunction with specific embodiments and accompanying drawing the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is partly cut-away's schematic diagram of radial rotary axial current-limiting type restriction choke;
Fig. 2 is the enlarged diagram of part shown in A in Fig. 1;
Fig. 3 is partly cut-away's schematic diagram of balancing sieve tube;
Fig. 4 is partly cut-away's schematic diagram of combined filtration thimble assembly.
Detailed description of the invention
With reference to Fig. 1, it is partly cut-away's schematic diagram of radial rotary axial current-limiting type restriction choke of the present invention.As can be seen from Figure 1, this restriction choke 1 comprises restriction choke body 11 and first throttle device supporting disk 12, second choke supporting disk 13, first and second restriction choke supporting disk 12,13 is arranged at the two ends of restriction choke body 11 respectively, locking device is provided with, as back tightening nut 12a between first throttle device supporting disk 12 and restriction choke body 11.Composition graphs 2, the dish end face of second choke supporting disk 13 offers multiple chute 14 and multiple first axial flowing hole 15 excessively for importing fluid, described chute 14 excessively and described first axial flowing hole 15 pass through second choke supporting disk annular space 16 conducting of this second choke supporting disk 13, at restriction choke body 11, the end face being provided with multiple first axial flowing hole of this second choke supporting disk 13 contiguous also offers multiple second axial flowing hole 17, fluid communication is carried out when aliging with multiple first axial flowing hole 15 to make described multiple second axial flowing hole 17, annular space 18 conducting of described second axial flowing hole 17 and restriction choke body 11.In described second axial flowing hole 17, stud with corrosion-resistant erosion resistant lining, described lining can use the one in tungsten alloy, pottery, polytetrafluoroethylene (PTFE) or powder metallurgy.In addition, it can also be seen that from Fig. 1, restriction choke body 11 is provided with graduation mark 11a, aligns for the multiple second axial flowing hole 17 made on restriction choke body 11 with the multiple first axial flowing holes 15 on second choke supporting disk 13 or stagger to make conducting between the two or cut-off.
As can be seen from Figure 2, sealing ring 19 is had additional between restriction choke body 11 and second choke supporting disk 13, in order to ensure being sealed and matched between restriction choke body 11 and second choke supporting disk 13, simultaneously, corrosion-resistant erosion resistant lining 2 is studded with, in order to extend the application life of described second axial flowing hole 17 in described second axial flowing hole 17; Described lining 2 can select the one in tungsten alloy, pottery, polytetrafluoroethylene (PTFE) or powder metallurgy.
With reference to Fig. 3, it is partly cut-away's schematic diagram of balancing sieve tube of the present invention.This balancing sieve tube comprises fluid passage 3 (being referred to as base tube 3 in the present embodiment), combined filtration thimble assembly 4 and restriction choke 1, the tube wall of base tube 1 offers multiple 3rd flowing hole 31, described 3rd flowing hole 31 can with annular space 18 conducting of this restriction choke body 11, thus make the 3rd flowing hole 31 of this base tube 3 form fluid passage with the second axial flowing hole 17 of restriction choke body 11 and the first axial flowing hole 15 of this second choke supporting disk 13.Described combined filtration thimble assembly 4 and restriction choke 1 coaxial sleeve are located on described base tube 3, one end of restriction choke 1 is fixed on base tube 3 by first throttle device supporting disk 12 and back tightening nut 12a, the other end of restriction choke 1 is fixed on base tube 3 by second choke supporting disk 13, one end of combined filtration thimble assembly 4 to be fixed on base tube 3 by this second choke supporting disk 13 and adjacent with restriction choke 1, and the other end of combined filtration thimble assembly 4 is then fixed on base tube 3 by filtration collar supports dish 47.It can also be seen that from Fig. 3, the two ends of base tube 3 are processed with gas thread 32, are coordinated with box cupling 33 by gas thread 32.
With reference to Fig. 4, this combined filtration thimble assembly 4 comprises internal protective cover 41, multiple filtration silk screen 42 and outer jointing jacket 43.Multiple protruding 44 are provided with in this internal protective cover 41 upper punch; Described protruding 44 is outstanding to make to form earial drainage space between internal protective cover 41 and base tube 3 thus to avoid the blocking of the smooth and stream of the stream that causes because being close between internal protective cover 41 and base tube 3 towards base tube 3.Chute 14 conducting excessively of described earial drainage space and this second choke supporting disk 13.
Described protruding 44 can helically mode or linear fashion arrangement on internal protective cover.Described projection is bridge-type, circle or special-shaped.
Another part on this internal protective cover 41 except protruding 44 is provided with multiple 4th flowing hole 45.Outer jointing jacket 43 also offers multiple 5th flowing hole 46.Described 4th flowing hole 45 and the 5th flowing hole 46 can be gap, bridge-type hole or circular hole.
Separately on this outer jointing jacket 43, also can be provided with protruding (not shown), it is outstanding towards filter screen direction.
Radial rotary axial current-limiting type restriction choke provided by the present invention and balancing sieve tube have following characteristics:
1, structure ingenious, easily process
Only the dish end face of in the shell wall of a restriction choke body and wherein restriction choke supporting disk need offer axial flowing hole, axial flowing hole on above-mentioned parts is alignd the adjacent object that can realize current limliting mutually, and offering of axial flowing hole is very easy, be convenient to processing especially.
Multiple filter screens in combined filtration thimble assembly are rolled into cylindrical shape by flaky material and by two edges in addition partial stack and form cylindrical shape, welding, can not cause damage to screen pack, and screen pack substantially by interiorly squeezing, the impact of external pressure and torsion.
The present invention is provided with multiple projection because internal protective cover rushes, and this special structure adds the annular space drainage area between internal protective cover and base tube, thus can increase the flow velocity of fluid; In addition, owing to being provided with projection on the stream of fluid, described projection can be formed to impact to the fluid flowed out in the 4th flowing hole on internal protective cover and produce turbulent flow with alter direction, thus can prevent sand grains from depositing blocking; In addition, the arrangement mode of projection of the present invention can as required and the helically mode that designs arranges and make fluid stream twist, so both prevent filter medium sand setting, the row's of returning measure can be adopted again to solve a stifled sand difficult problem, and there is washed-out sand and moderate leading effect.
2, site operation is convenient
When constructing at the scene, only need by radial rotary restriction choke body, make that the axial flowing hole subtend on different parts is through can control number of openings very like a cork, thus realize the object of current limliting.
3, current-limiting operation is very accurately clear
The graduation mark that restriction choke body is provided with, makes operation more understand accurately.
4, sand control filter effect is better
Combined filtration thimble assembly is monolithic construction, and the bridge-type salient point on internal protective cover adds annular space drainage area, can effectively prevent filter medium sand setting.
Claims (7)
1. a balancing sieve tube, comprise base tube, combined filtration thimble assembly and the restriction choke for the fluid flow that controls described base tube, the tube wall of described base tube offers multiple 3rd flowing hole, described combined filtration thimble assembly and restriction choke coaxial sleeve are located at the outside of described base tube; It is characterized in that: described restriction choke is radial rotary axial current-limiting type restriction choke, comprise restriction choke body and first throttle device supporting disk and second choke supporting disk, this first, second restriction choke supporting disk is arranged at the two ends of restriction choke body respectively; This second choke supporting disk comprise be located on dish end face for importing crossing chute, multiple first axial flowing hole and will the second choke supporting disk annular space that is communicated with described first axial flowing hole of chute being crossed of fluid; On described restriction choke body, the contiguous end face being provided with the second choke supporting disk of described first axial flowing hole is provided with multiple second axial flowing hole, studs with corrosion-resistant erosion resistant lining and be communicated with the annular space of described restriction choke body in described second axial flowing hole; Described first axial flowing hole makes conducting or cut-off between the two with described second axial flowing hole in the mode of aliging or stagger, locking device is provided with, the annular space conducting of described 3rd flowing hole and restriction choke body between this first throttle device supporting disk and this restriction choke body.
2. balancing sieve tube as claimed in claim 1, is characterized in that: described restriction choke body is provided with graduation mark.
3. balancing sieve tube as claimed in claim 1, is characterized in that: this combined filtration thimble assembly comprises internal protective cover and outer jointing jacket, and is located at the multiple filter screens between interior outer jointing jacket; This internal protective cover is provided with multiple projection, and the part on this internal protective cover except multiple projection is provided with multiple 4th flowing hole; This outer jointing jacket is also provided with multiple 5th flowing hole.
4. balancing sieve tube as claimed in claim 3, is characterized in that: described projection is given prominence to towards this base tube, to form annular flow space between this base tube and this combined filtration thimble assembly, and the chute conducting excessively of described annular flow space and restriction choke.
5. balancing sieve tube as claimed in claim 1, is characterized in that: described multiple filter screen is rolled into cylindrical shape by flaky material and by two edges in addition partial stack and form cylindrical shape.
6. balancing sieve tube as claimed in claim 3, is characterized in that helically mode, the linear fashion arrangement on internal protective cover of described projection.
7. balancing sieve tube as claimed in claim 3, is characterized in that described projection is bridge-type, circle or special-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910243109.7A CN102108849B (en) | 2009-12-28 | 2009-12-28 | Balance screen pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910243109.7A CN102108849B (en) | 2009-12-28 | 2009-12-28 | Balance screen pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102108849A CN102108849A (en) | 2011-06-29 |
| CN102108849B true CN102108849B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910243109.7A Active CN102108849B (en) | 2009-12-28 | 2009-12-28 | Balance screen pipe |
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| CN (1) | CN102108849B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108138557B (en) * | 2015-09-15 | 2020-08-21 | 中国海洋石油集团有限公司 | Water control pipe column and automatic inflow control current limiter and inflow control device thereof |
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- 2009-12-28 CN CN200910243109.7A patent/CN102108849B/en active Active
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| Publication number | Publication date |
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| CN102108849A (en) | 2011-06-29 |
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