CN104863534A - Swirling sand removing device and method - Google Patents
Swirling sand removing device and method Download PDFInfo
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- CN104863534A CN104863534A CN201510343354.0A CN201510343354A CN104863534A CN 104863534 A CN104863534 A CN 104863534A CN 201510343354 A CN201510343354 A CN 201510343354A CN 104863534 A CN104863534 A CN 104863534A
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- nozzle component
- piston
- tube connector
- central tube
- component
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Abstract
The invention provides a swirling sand removing device and a swirling sand removing method. A hollow center pipe is arranged in a connecting pipe in a sliding manner, the front end of the connecting pipe is connected with a rotary front nozzle component, and a rear nozzle component is arranged at the side wall of the connecting pipe; a side through hole is formed in the side wall of the center pipe, and the side through hole is communicated with a rear nozzle of the rear nozzle component when the center pipe is located at an axial position; a piston component is arranged in the connecting pipe, a piston through hole is formed in the piston component, and the piston through hole is communicated with a front nozzle of the front nozzle component; when the central pipe moves axially, the piston is closed or started by the central pipe; a spring which enables the center pipe to be far away from the front nozzle component is further arranged between the central pipe and the connecting pipe. By adopting the structure and the method provided by the invention, the axial movement of the central pipe can be controlled by feeding fluid supply pressure of the connecting pipe, and the forwards rotary liquid injection of the front nozzle component and the backwards liquid injection of the rear nozzle component can be realized, therefore the sand can flow orderly in a shaft bottom, the turbulence is low in the sand removing process, and the sand cleaning effect of the shaft bottom can be improved.
Description
Technical field
The present invention relates to deep-well construction operation field, particularly a kind of eddy flow fettling installation and method.
Background technology
Sandstone oil field and heavy oil reservoirs often can run into formation sand production problem on stream, adopt in gravel pack completion or pressure break completion work progress meanwhile, also often occur that back-up sand deposition is detained the problem in shaft bottom.Formation sand production or back-up sand sedimentation can be trapped in formation sand post, casting bed in pit shaft, and blocking preforation tunnel and nearly duct, borehole wall stratum, make well fluids downhole flow resistance increase, production declining, will affect the normal production of oil well time serious; In addition, part well workover stimulation work needs well-flushing before construction.Therefore, Oil/gas Well must adopt hydraulic sand washing pumping and washing process to remove deposition sand formation cuttings in well.Current, because horizontal well and extended reach well production technique can significantly improve well yield and oil recovery factor, scale of applying in recent years expands rapidly.But, the application of adjoint horizontal well and extended reach well technology, because of horizontal well and extended reach well, due to the particularity of casing programme, there are longer sand formation cuttings and enter stream interface in horizontal segment; Fluid flow direction is vertical with sand fallout velocity attitude; The slight fluctuating of horizontal wellbore well track can cause the wavy distribution of deposition sand formation cuttings.Along with the carrying out of exploitation, reservoir sand more easily enters pit shaft, forms casting bed and even may block well, cause equipment attrition and production declining in wellbore bottom.Therefore, horizontal well sand washing well washing effect directly affects its production capacity and cost of winning.
So far, there is a lot of sand removal methods for different hole conditions in Oil/gas Well sand removal technical development.As: plain tubing eddy flow sand removal well-flushing.But plain tubing eddy flow sand washing mode is undesirable for the sand removal effect of horizontal well, extended reach well.Chinese patent literature CN201027512Y, discloses a kind of sand sucking device of oil/water well, by cross over pipe, sand flash valve, sealing drum, plunger, sand device, enters sand valve, draws sand letter and form.Cross over pipe bottom connects with sand flash valve top, and sand flash valve bottom connects with plunger upper part, and plunger is in sealing drum, and sealing drum top diameter of bore is less than the diameter of plunger, sealing drum bottom with enter sand valve top and connect, enter sand valve bottom and draw sand cylinder and connect.Adopt the suction sediment outflow of similar one way valve mode, Problems existing is that cleaning performance is undesirable, and operation intensity is large, sand removal complex process.
Chinese patent literature CN 204113156 U, disclose a kind of oil field operation fettling installation, comprise mandrel, blanking plug, blanking plug seat, sand washing shower nozzle, sealing ring, the bottom of mandrel connects sand washing shower nozzle, described sand washing shower nozzle and the outside of mandrel are provided with blanking plug seat, described sand washing shower nozzle 4 is provided with sealing ring with mandrel 1 internal connection, blanking plug is fixed on the top of blanking plug seat, the inside of described mandrel is provided with swirl injection device, described swirl injection device comprises rotary fluid, described rotary fluid is pyramidal structure, the inside of rotary fluid is provided with screw rod, rotary fluid is provided with liquid inlet, liquid outlet and spilling port, the liquid inlet of rotary fluid connects into well liquid pump, the liquid outlet of rotary fluid connects sand washing shower nozzle, the spilling port of rotary fluid connects riffler, this structure achieve waterpower from entering, speed limit rotates, turbulent flow takes sand, the functions such as deep layer de-plugging, solve complex structural well sand washing operation sand setting, take the problem of sand, load transfer, sand plug tubing string.But the sand removal effect of this structure is still not ideal.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of eddy flow fettling installation and method, and sand can be made at shaft bottom olderly flowage, and in sand removal process, turbulent flow is little, improves sand removal effect.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of eddy flow fettling installation, and slide in tube connector central tube logical in being provided with, and tube connector front end is connected with rotatable front nozzle component, nozzle component after tube connector sidewall is provided with;
The sidewall of central tube is provided with side through hole, and when central tube is positioned at an axial location, side through hole is communicated with the rear spray orifice of rear nozzle component;
In tube connector, be provided with piston component, piston component is provided with piston hole, and piston hole is communicated with the front spray orifice of front nozzle component;
Moving axially by central tube, piston hole is closed by central tube or is opened.
The spring making central tube away from front nozzle component is also provided with between central tube and tube connector.
Be provided with chute at the outer wall of central tube, be provided with pin at the sidewall of tube connector, the termination of pin is positioned at chute.
Tube connector tail end is connected with pigtail connection, and the internal diameter of pigtail connection is greater than the internal diameter of tube connector.
Described tube connector forms by least two sections, rear nozzle component is between two sections of tube connectors, annular groove is provided with at the inwall of rear nozzle component, when central tube is positioned at an axial location, annular groove is communicated with side through hole, be provided with multiple rear spray orifice tilted to tube connector tail end at the sidewall of rear nozzle component, rear spray orifice is communicated with annular groove.
Described central tube front end is provided with glissile segment, and the front end of glissile segment is provided with expanding block section, realizes the shutoff to piston hole by block section.
In described piston component, piston head is connected with block by adjusting bolt, and piston head is positioned at glissile segment, and piston hole is arranged on the submarginal position of block.
Described front nozzle component is provided with cone-shaped end, and multiple front spray orifice is positioned on taper surface, and taper surface is also provided with multiple swivel nozzle.
Bearing is provided with between described front nozzle component and tube connector.
Adopt above-mentioned eddy flow fettling installation to carry out a method for sand removal operation, comprise the following steps: to pass into the axially-movable of the liquid supply pressure control centre pipe of tube connector, alternately realize front nozzle component rotary liquid jet and rear nozzle component hydrojet backward forward.
Through carefully analyzing, at Chinese patent literature CN204113156 U, in disclosed a kind of oil field operation fettling installation, have employed and carry out sand removal to the mode of front and rear sandblasting simultaneously, this mode turbulent flow is comparatively large, and part sand is still deposited on shaft bottom, so sand removal effect is still not ideal enough along with turbulent flow.
A kind of eddy flow fettling installation provided by the invention and method, by adopting above-mentioned structure and method, realize the axially-movable of liquid supply pressure control centre pipe to pass into tube connector, realize front nozzle component forward rotary liquid jet and rear nozzle component backward hydrojet hocket.Thus sand can be made at shaft bottom olderly flowage, in sand removal process, turbulent flow is little, improves the sand removal effect in shaft bottom.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is overall structure schematic diagram of the present invention, have employed omissive representation, eliminate tube connector in figure.
Fig. 2 is the A direction view of Fig. 1.
Fig. 3 is the expansion view of chute in the present invention.
In figure: pigtail connection 1, central tube 2, chute 201, back-up ring 202, side through hole 203, glissile segment 204, block section 205, pin 3, spring 4, rear nozzle component 5, rear spray orifice 51, annular groove 52, first tube connector 6, piston component 7, piston head 701, block 702, piston hole 703, adjusting bolt 704, the second tube connector 8, bearing support 9, front nozzle component 10, front spray orifice 101, swivel nozzle 102, bearing 11.
Detailed description of the invention
Embodiment 1:
As in Fig. 1, a kind of eddy flow fettling installation, slide in tube connector central tube 2 logical in being provided with, and tube connector tail end is connected with pigtail connection 1, and the internal diameter of pigtail connection 1 is greater than the internal diameter of tube connector.Front end in this example refers to the right-hand member in Fig. 1, and tail end refers to the left end in Fig. 1.
Tube connector front end is connected with rotatable front nozzle component 10, nozzle component 5 after tube connector sidewall is provided with;
The sidewall of central tube 2 is provided with side through hole 203, and when central tube 2 is positioned at an axial location, side through hole 203 is communicated with the rear spray orifice 51 of rear nozzle component 5; Rear spray orifice 51 in this example tilts to tube connector tail end.
In tube connector, be provided with piston component 7, piston component 7 is provided with piston hole 703, and piston hole 703 is communicated with the front spray orifice 101 of front nozzle component 10;
By moving axially of central tube 2, piston hole 703 is closed by central tube 2 or is opened.
The spring 4 making central tube 2 away from front nozzle component 10 is also provided with between central tube 2 and tube connector.In preferred scheme, described tube connector forms by least two sections, rear nozzle component 5 is between two sections of tube connectors, annular groove 52 is provided with at the inwall of rear nozzle component 5, when central tube 2 is positioned at an axial location, annular groove 52 is communicated with side through hole 203, and be provided with multiple rear spray orifice 51 tilted to tube connector tail end at the sidewall of rear nozzle component 5, rear spray orifice 51 is communicated with annular groove 52.Meanwhile, the tail end end face of rear nozzle component 5, also as the position limiting structure of spring 4, the other end of spring is spacing by the back-up ring 202 being installed in central tube 2 outer wall.Structure thus, spring makes central tube 2 always be tending towards away from front nozzle component 10.
As in Fig. 1, be provided with chute 201 at the outer wall of central tube 2, be provided with pin 3 at the sidewall of tube connector, the termination of pin 3 is positioned at chute 201.Structure thus, makes central tube 2 only can move back and forth in the stroke limited,
In preferred scheme, described chute 201 be one section of cam path as shown in Figure 3, to make central tube 2 limited when the position at chute 201 two ends, and need again to input a larger pressure and could continue to move back and forth, the fluctuation in order to avoid be under pressure, affect the effect of sand removal, the sand removal effect of nozzle component 10 especially.From Fig. 3, when repeatedly inputting larger pressure, pin 3 under spring 4 acts on, by the termination, bottom compared with short lines line segment or longer straight-line segment be alternately locked in below cam path.
As in Fig. 1, described central tube 2 front end is provided with glissile segment 204, and the front end of glissile segment 204 is provided with expanding block section 205, realizes the shutoff to piston hole 703 by block section 205.In described piston component 7, piston head 701 is connected with block 702 by adjusting bolt 704, and piston head 701 is positioned at glissile segment 204, and piston hole 703 is arranged on the submarginal position of block 702.Structure thus, piston head 701 is positioned at expanding glissile segment 204 and forms piston mechanism, and block section 205 outwards bends, when central tube 2 run to contact with block 702 time, by piston hole 703 shutoff.Thus central tube 2 logical in switching is communicated with rear nozzle component 5 with front nozzle component 10 respectively.Adjusting bolt 704, for the axial distance between regulating piston assembly 7 and central tube 2, is better fitted and packed-piston through hole 703 to make central tube 2.
As in Fig. 1,2, described front nozzle component 10 is provided with cone-shaped end, and multiple front spray orifice 101 is positioned on taper surface, and taper surface is also provided with multiple swivel nozzle 102.Structure thus, is convenient to realize uniform hydrojet, and while hydrojet, before driving, nozzle component 10 rotates, to improve sand washing effect.In this example, swivel nozzle 102 adopts the structure arranging nozzle in the front end of oblique runner, the axis of nozzle and the axis of oblique runner have angle, to make front nozzle component 10 obtain maximum rotary thrust, this structure, while acquisition is compared with high thrust, is also convenient to processing and installs.
Bearing 11 is provided with between described front nozzle component 10 and tube connector.As in Fig. 1, the second tube connector 8 is connected with bearing support 9, and bearing support 9 is connected with front nozzle component 10 by the bearing 11 in it, between bearing support 9 and the second tube connector 8, is also provided with seal between front nozzle component 10 and bearing support 9.
Embodiment 2:
A kind of method adopting above-mentioned eddy flow fettling installation to carry out sand removal operation, comprise the following steps: to pass into the axially-movable of the liquid supply pressure control centre pipe 2 of tube connector, realize front nozzle component 10 forward rotary liquid jet and rear nozzle component 5 backward hydrojet hocket.
Concrete is: when passing into the liquid of less pressure from pigtail connection 1, the elasticity that the axial force of central tube 2 generation is not enough to make central tube 2 overcome spring is moved to the right in Fig. 1, now, for to seal between side through hole 203 and rear nozzle component 5, liquid pushes piston component 7 open, enter in front nozzle component 10 from piston hole 703, and spray orifice 101 and swivel nozzle 102 spray in the past, liquid is while ejection, before also driving, nozzle component 10 rotates, take up after the sand in shaft bottom is spun, sand migrated after a segment distance by cyclonic action, be deposited on rear spray orifice 51 top of rear nozzle component 5.When passing into the liquid of larger pressure from pigtail connection 1, to the axial force that central tube 2 produces, the elasticity making central tube 2 overcome spring moves to the right in Fig. 1, block section 205 is by piston hole 703 shutoff, now side through hole 203 is communicated with annular groove 52, thus liquid sprays from rear spray orifice 51, by the sand on rear spray orifice 51 top clean, until with fluid through well head to ground.Alternately repeat, realize sand washing operation bottom oil well.
The above embodiments are only the preferred technical solution of the present invention, and should not be considered as restriction of the present invention, and the embodiment in the application and the feature in embodiment, when not conflicting, can be combined mutually.The technical scheme that protection scope of the present invention should be recorded with claim, the equivalents comprising technical characteristic in the technical scheme of claim record is protection domain.Namely the equivalent replacement within the scope of this improves, also within protection scope of the present invention.
Claims (10)
1. an eddy flow fettling installation, is characterized in that: slide in tube connector central tube (2) logical in being provided with, and tube connector front end is connected with rotatable front nozzle component (10), nozzle component (5) after tube connector sidewall is provided with;
The sidewall of central tube (2) is provided with side through hole (203), and when central tube (2) is positioned at an axial location, side through hole (203) is communicated with the rear spray orifice (51) of rear nozzle component (5);
In tube connector, be provided with piston component (7), piston component (7) is provided with piston hole (703), and piston hole (703) is communicated with the front spray orifice (101) of front nozzle component (10);
By moving axially of central tube (2), piston hole (703) is closed by central tube (2) or is opened.
2. a kind of eddy flow fettling installation according to claim 1, is characterized in that: between central tube (2) and tube connector, be also provided with the spring (4) making central tube (2) away from front nozzle component (10).
3. a kind of eddy flow fettling installation according to claim 1, is characterized in that: be provided with chute (201) at the outer wall of central tube (2), is provided with pin (3) at the sidewall of tube connector, the termination of pin (3) is positioned at chute (201).
4. a kind of eddy flow fettling installation according to claim 1, is characterized in that: tube connector tail end is connected with pigtail connection (1), the internal diameter of pigtail connection (1) is greater than the internal diameter of tube connector.
5. a kind of eddy flow fettling installation according to claim 1, it is characterized in that: described tube connector forms by least two sections, rear nozzle component (5) is between two sections of tube connectors, annular groove (52) is provided with at the inwall of rear nozzle component (5), when central tube (2) is positioned at an axial location, annular groove (52) is communicated with side through hole (203), and be provided with multiple rear spray orifice (51) tilted to tube connector tail end at the sidewall of rear nozzle component (5), rear spray orifice (51) is communicated with annular groove (52).
6. a kind of eddy flow fettling installation according to claim 1, it is characterized in that: described central tube (2) front end is provided with glissile segment (204), the front end of glissile segment (204) is provided with expanding block section (205), realizes the shutoff to piston hole (703) by block section (205).
7. a kind of eddy flow fettling installation according to claim 6, it is characterized in that: in described piston component (7), piston head (701) is connected with block (702) by adjusting bolt (704), piston head (701) is positioned at glissile segment (204), and piston hole (703) is arranged on block (702) submarginal position.
8. a kind of eddy flow fettling installation according to claim 1, is characterized in that: described front nozzle component (10) is provided with cone-shaped end, and multiple front spray orifice (101) is positioned on taper surface, and taper surface is also provided with multiple swivel nozzle (102).
9. a kind of eddy flow fettling installation according to claim 1, is characterized in that: be provided with bearing (11) between described front nozzle component (10) and tube connector.
10. adopt the eddy flow fettling installation described in any one of claim 1 ~ 9 to carry out a method for sand removal operation, it is characterized in that comprising the following steps:
To pass into the axially-movable of liquid supply pressure control centre pipe (2) of tube connector, alternately realize front nozzle component (10) rotary liquid jet and rear nozzle component (5) hydrojet backward forward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510343354.0A CN104863534B (en) | 2015-06-19 | 2015-06-19 | Eddy flow fettling installation and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510343354.0A CN104863534B (en) | 2015-06-19 | 2015-06-19 | Eddy flow fettling installation and method |
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| Publication Number | Publication Date |
|---|---|
| CN104863534A true CN104863534A (en) | 2015-08-26 |
| CN104863534B CN104863534B (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510343354.0A Expired - Fee Related CN104863534B (en) | 2015-06-19 | 2015-06-19 | Eddy flow fettling installation and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840127A (en) * | 2016-05-30 | 2016-08-10 | 泸州长江石油工程机械有限公司 | Double-layer coiled tube sand pumping device and double-layer coiled tube sand pumping technology |
| CN106285527A (en) * | 2016-10-27 | 2017-01-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of Double helix flushing tool |
| CN112253024A (en) * | 2020-12-08 | 2021-01-22 | 中国石油天然气集团有限公司 | Oil pipe sand removal device and sand removal method for oil and gas well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201614902U (en) * | 2010-01-19 | 2010-10-27 | 中国石油化工股份有限公司 | Post-fracturing rotary sand washing head |
| CN202031542U (en) * | 2011-01-17 | 2011-11-09 | 西安鼎和新型能源有限公司 | Bailing device for oil well |
| US20130213655A1 (en) * | 2012-02-22 | 2013-08-22 | Carolina Gonzalez Martinez | High Pressure Jet Perforation System |
| CN203742495U (en) * | 2014-03-14 | 2014-07-30 | 中国海洋石油总公司 | High-pressure rotary washing tool |
| CN203822217U (en) * | 2014-01-11 | 2014-09-10 | 中国石油化工股份有限公司 | Internal circulating hole concealed type reverse circulation valve |
| CN104405311A (en) * | 2014-10-17 | 2015-03-11 | 西南石油大学 | High-efficiency self-adjustable hydraulic sand washing tool for horizontal well |
| CN204782851U (en) * | 2015-06-19 | 2015-11-18 | 长江大学 | Whirl sand removal device |
-
2015
- 2015-06-19 CN CN201510343354.0A patent/CN104863534B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201614902U (en) * | 2010-01-19 | 2010-10-27 | 中国石油化工股份有限公司 | Post-fracturing rotary sand washing head |
| CN202031542U (en) * | 2011-01-17 | 2011-11-09 | 西安鼎和新型能源有限公司 | Bailing device for oil well |
| US20130213655A1 (en) * | 2012-02-22 | 2013-08-22 | Carolina Gonzalez Martinez | High Pressure Jet Perforation System |
| CN203822217U (en) * | 2014-01-11 | 2014-09-10 | 中国石油化工股份有限公司 | Internal circulating hole concealed type reverse circulation valve |
| CN203742495U (en) * | 2014-03-14 | 2014-07-30 | 中国海洋石油总公司 | High-pressure rotary washing tool |
| CN104405311A (en) * | 2014-10-17 | 2015-03-11 | 西南石油大学 | High-efficiency self-adjustable hydraulic sand washing tool for horizontal well |
| CN204782851U (en) * | 2015-06-19 | 2015-11-18 | 长江大学 | Whirl sand removal device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840127A (en) * | 2016-05-30 | 2016-08-10 | 泸州长江石油工程机械有限公司 | Double-layer coiled tube sand pumping device and double-layer coiled tube sand pumping technology |
| CN106285527A (en) * | 2016-10-27 | 2017-01-04 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of Double helix flushing tool |
| CN112253024A (en) * | 2020-12-08 | 2021-01-22 | 中国石油天然气集团有限公司 | Oil pipe sand removal device and sand removal method for oil and gas well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104863534B (en) | 2016-11-23 |
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