CN106285523A - A kind of horizontal well negative pressure takes out sand device - Google Patents
A kind of horizontal well negative pressure takes out sand device Download PDFInfo
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- CN106285523A CN106285523A CN201510237509.2A CN201510237509A CN106285523A CN 106285523 A CN106285523 A CN 106285523A CN 201510237509 A CN201510237509 A CN 201510237509A CN 106285523 A CN106285523 A CN 106285523A
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- union joint
- negative pressure
- out sand
- horizontal well
- takes out
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Abstract
The present invention specifically provides a kind of horizontal well negative pressure and takes out sand device, including urceolus, trunnion, central canal, nozzle, union joint and baffle plate head, in urceolus is inserted on union joint top and threaded with it, union joint lower end surface is connected with baffle plate head, union joint front end outer wall is connected with central canal lower end, union joint front end endoporus is connected with trunnion lower end, trunnion is internal through central canal upper surface from central canal, nozzle is placed in the endoporus of trunnion bottom, nozzle lower surface is against in union joint front end on hole end surface, annular space is formed between outer tube inner wall and central canal and union joint front end outer wall.This invention realizes continuous negative pressure in horizontal segment pit shaft and takes out sand, has snaking in sleeve pipe, a function of broken cement simultaneously, discontinuous during solving horizontal well sand washing, miss serious problem.
Description
Technical field
The invention belongs to oil extraction in oil field technical field, be specifically related to a kind of horizontal well negative pressure and take out sand device.
Background technology
Progress along with horizontal well development technology, horizontal section length, transformation hop count and pressure break scale increase year by year, the especially sizable application of horizontal well " volume fracturing " (" thousand side's sand, incomparably liquid ", many bunches of segmentation), see in horizontal well pit shaft that the problems such as the sand cycle is short, sand production rate big, leakage is serious are the most serious, have impact on effectively playing of production capacity and carrying out smoothly of later stage measure, sand-flushing operation need to be carried out in time and ensure pit shaft smoothness.
At present, " conventional nib+instrument oil pipe " sand washing process is still the main process that each elephant horizontal well is used, and this process matching is simple, low cost, strong adaptability, is widely used in the horizontal well that horizontal segment is shorter, wastage is less.
But on-the-spot application shows, " conventional nib+instrument oil pipe " sand washing process used now also exist sand washing discontinuously cause time-consuming long, cost is high and mesolow oil reservoir enters that ground liquid measure is big, the row of returning leads the problems such as low, stratum is produced simultaneously and to a certain degree injure, have impact on horizontal well development effect.
Attempt having carried out improving based on conventional nib improving or have developed new sand flushing tool for problem above oil field at home, as Chinese patent CN203394393U discloses a kind of sand-washing pen point, this sand-washing pen point includes a tubular configured joint, the upper and lower end of this tubular configured joint is respectively equipped with female thread, and the inwall of this tubular configured joint is provided with annular boss；One spray nozzle plate is by being resisted against this annular boss on the downside of annular boss；One tubulose nib is connected to tubular configured joint lower end by the female thread of tubular configured joint lower end, and the upper end of this tubulose nib is resisted against the downside of spray nozzle plate；Described spray nozzle plate is provided with three up big and down small shoulder holes, is fixedly installed a nozzle in each shoulder hole；Described nozzle bottom protrudes from the bottom surface of spray nozzle plate, and an anti-blocking cap of copper is connected to the bottom of nozzle.This patent increases the flow velocity of sand cleaning fluid, improves sand washing effect, shortens sand washing time and labor intensity.
And for example Chinese patent CN201513144U discloses a kind of downhole reverse-circulation sand flusher for horizontal wells, connect in top connection lower end and have a central canal, connect at top connection lower end external screw thread and have a packing element mandrel, liquid inlet is had on packing element mandrel wall, two V-type packing elements it are fixed with on the outer wall of packing element mandrel, the lower end of packing element mandrel connects nozzle shaft, annular space is formed between nozzle shaft inwall and central canal outer wall, liquid outlet is had on nozzle axial wall, equipped with nozzle on nozzle shaft, the bottom of nozzle shaft connects the pressure cap having top to be taper.This patent can realize eddy flow sand washing, and the eddy flow mulling liquid of generation is the most counter drains into ground.
But, this type of has carried out improving based on conventional nib and has improved or have developed the direction of partial fluid in new sand flushing tool is only capable of improving the sand washing performance in terms of certain or changes pit shaft, discontinuous during still cannot inherently solving horizontal well sand washing, miss serious problem.
Summary of the invention
It is an object of the invention to provide a kind of horizontal well negative pressure and take out sand device, in horizontal segment pit shaft, realize continuous negative pressure take out sand, there is snaking, the function of broken cement in sleeve pipe simultaneously, discontinuous during solving horizontal well sand washing, miss serious problem.
nullThe technical scheme is that providing a kind of horizontal well negative pressure takes out sand device，Including urceolus、Trunnion、Central canal、Nozzle、Union joint and baffle plate head，In urceolus is inserted on described union joint top and threaded with it，Described union joint lower end surface is connected with baffle plate head，Described union joint front end outer wall is connected with central canal lower end，Union joint front end endoporus is connected with trunnion lower end，Described trunnion is internal through central canal upper surface from central canal，Described nozzle is placed in the endoporus of trunnion bottom，Nozzle lower surface is against in union joint front end on hole end surface，Annular space is formed between described outer tube inner wall and central canal and union joint front end outer wall，It is provided with spray-hole on described urceolus，It is provided with central passage inside described union joint，Central passage is provided with multiple delivery hole one communicated with urceolus radially outside，Central passage be provided with axially outside multiple run through union joint take out sand hole，Multiple delivery hole two is set on union joint lower sides，Union joint lower inner wall becomes a cavity with baffle plate capitiform，Delivery hole two communicates with this cavity，It is provided with in the cavity that described union joint becomes with baffle plate capitiform and on baffle plate head and multiple takes out sand passage.
Sealing ring one it is provided with between above-mentioned central canal and trunnion.
It is provided with sealing gasket between above-mentioned central canal and union joint.
Sealing ring two it is provided with between above-mentioned union joint and urceolus.
The axial angle of above-mentioned spray-hole is 30 °, and radially angle is 20 °.
Above-mentioned delivery hole one and take out sand hole and all have 3, and delivery hole one and take out that sand hole is circumferentially spaced in union joint to be alternately distributed.
Said nozzle is the pyramidal structure that the little lower bore of upper bore is big.
For threadeding between above-mentioned union joint with baffle plate head.
For threadeding between above-mentioned union joint and central canal.
For threadeding between above-mentioned union joint front end endoporus and trunnion.
Beneficial effects of the present invention:
(1) this horizontal well negative pressure that the present invention provides takes out sand device by integrated to desanding in pit shaft, snaking, broken cement function and realize one-trip string connection and make, and greatly simplifies working procedure, improves efficiency of construction.
(2) this horizontal well negative pressure that the present invention provides is taken out sand device and is devised mechanisms such as can producing the trunnion of negative pressure, nozzle, make the power liquid on ground be acted directly on by energy by Special circulation passage and be formed continuously negative pressure at the trunnion of tool interior, nozzle, sand washing innovation is taken out sand for negative pressure, improves desanding efficiency.
(3) this horizontal well negative pressure that the present invention provides is taken out sand device and is devised spray-hole by the ejection at a high speed of fraction power liquid, smoothly complete at effectively stirring sand grains and take out sand function the most also there is cleaning pit shaft encrustation, broken cement function, also can control the flow velocity at spray-hole according to well head pump delivery, to reach the purpose crushed in various degree, improve the adaptability to pit shaft, ensure that the smoothness of pit shaft after construction, for looking for water blockoff, surveying production profile, repeat the subsequent jobs such as transformation and provide good guarantee.
(4) this horizontal well negative pressure that the present invention provides takes out the employing of sand device and concentric oil tubes process pipe string matching operation; three passages are established in horizontal segment; in work progress, circulating liquid does not directly contact with stratum, effectively protects the reservoir problem of leakage during technique source solves horizontal well desanding simultaneously.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is the structural representation that horizontal well negative pressure of the present invention takes out sand device.
Fig. 2 is the schematic cross-section in Fig. 1 along A-A direction.
Fig. 3 is that horizontal well negative pressure of the present invention takes out flow direction schematic diagram in sand device work process.
Fig. 4 is that horizontal well continuous negative pressure takes out flow direction schematic diagram in sand process pipe string and work progress.
Description of reference numerals: 1, urceolus；2, trunnion；3, sealing ring one；4, central canal；5, sealing gasket；6, nozzle；7, union joint；8, sealing ring two；9, baffle plate head；10, spray-hole；11, delivery hole one；12, delivery hole two；13, sand hole is taken out；14, sand passage is taken out；15, central passage；16, horizontal well negative pressure takes out sand device；17, built-in oil pipe；18, concentric oil tubes box cupling；19, sleeve pipe；20, instrument oil pipe；21, sealing cup；22, adapter.
Detailed description of the invention
Embodiment 1:
nullIn order to discontinuous during overcoming existing level well sand washing、Miss serious problem，Present embodiments provide a kind of such as Fig. 1、Fig. 2、Horizontal well negative pressure shown in Fig. 3 takes out sand device，Including urceolus 1、Trunnion 2、Central canal 4、Nozzle 6、Union joint 7 and baffle plate head 9，In urceolus 1 is inserted on described union joint 7 top and threaded with it，Described union joint 7 lower end surface is connected with baffle plate head 9，Described union joint 7 front end outer wall is connected with central canal 4 lower end，Union joint 7 front end endoporus is connected with trunnion 2 lower end，Described trunnion 2 is internal through central canal 4 upper surface from central canal 4，Described nozzle 6 is placed in the endoporus of trunnion 2 bottom，Nozzle 6 lower surface is against in union joint 7 front end on hole end surface，Annular space is formed between described urceolus 1 inwall and central canal 4 and union joint 7 front end outer wall，It is provided with spray-hole 10 on described urceolus 1，Described union joint 7 is internal is provided with central passage 15，Central passage 15 is provided with multiple delivery hole 1 communicated with urceolus 1 radially outside，Central passage 15 be provided with axially outside multiple run through union joint 7 take out sand hole 13，Multiple delivery hole 2 12 is set on union joint 7 lower sides，Union joint 7 lower inner wall and baffle plate head 9 form a cavity，Delivery hole 2 12 communicates with this cavity，It is provided with in the cavity that described union joint 7 and baffle plate head 9 are formed and on baffle plate head 9 and multiple takes out sand passage 14.
Wherein, it is provided with sealing ring 1 between described central canal 4 and trunnion 2；It is provided with sealing gasket 5 between described central canal 4 and union joint 7；It is provided with sealing ring 28 between described union joint 7 and urceolus 1；For threadeding between described union joint 7 and baffle plate head 9；For threadeding between described union joint 7 and central canal 4；For threadeding between described union joint 7 front end endoporus and trunnion 2.
The installation process that the horizontal well negative pressure of the present invention takes out sand device is as follows: as shown in Figure 1, after first nozzle 6 being inserted trunnion 2 bottom endoporus, then trunnion 2 is connected with union joint 7 front end inner hole thread, hole end surface nozzle 6 is positioned in now nozzle 6 lower surface has withstood on union joint 7 front end；Sealing ring 1 is built in the end of central canal 4, sealing gasket 5 overlaps before union joint 7 in end slot, then by central canal 4 after trunnion 2 front end is inserted with the threadeding of union joint 7 front end cylindrical；Sealing ring 28 is inserted in union joint 7 peripheral groove, then urceolus 1 is inserted in from top union joint 7 and threadeds with it；Baffle plate head 9 is threadeded with union joint 7 lower end surface.
It addition, as it is shown in figure 1, the axial angle of described spray-hole 10 is 30 °, radially angle is 20 °；Described nozzle 6 is the pyramidal structure that the little lower bore of upper bore is big.As in figure 2 it is shown, described delivery hole 1 and take out sand hole 13 and all have 3, and delivery hole 1 and take out that sand hole 13 is circumferentially spaced in union joint 7 to be alternately distributed.
This horizontal well negative pressure that the present invention provides is taken out sand device and is devised mechanisms such as can producing the trunnion 2 of negative pressure, nozzle 6, make the power liquid on ground be acted directly on by energy by Special circulation passage and be formed continuously negative pressure at the trunnion 2 of tool interior, nozzle 6, sand washing innovation is taken out sand for negative pressure, improves desanding efficiency.Simultaneously, spray-hole 10 is by the ejection at a high speed of fraction power liquid, smoothly complete at effectively stirring sand grains and take out sand function the most also there is cleaning pit shaft encrustation, broken cement function, also can control the flow velocity at spray-hole according to well head pump delivery, to reach the purpose crushed in various degree, improve the adaptability to pit shaft, it is ensured that the smoothness of pit shaft after construction, for looking for water blockoff, surveying production profile, repeat the subsequent jobs such as transformation and provide good guarantee.
Embodiment 2:
On the basis of embodiment 1, present embodiments provide horizontal well negative pressure of the present invention and take out that sand device process pipe string during construction is supporting and work progress:
1, well head is supporting
As shown in Figure 4, before construction, well head is changed to " well head four-way+circulate wellhead assembly continuously ".
2, process pipe string is supporting
First carry out visiting sand face and drifting operation, determine position, sand face and ensure the above pit shaft in position, sand face pass through performance；Secondly Joining Technology tubing string, process pipe string is designed as (artesian well is down to well head): horizontal well negative pressure takes out the sand single concentric oil tubes of device 16+ (instrument oil pipe+built-in oil pipe 17+ concentric oil tubes box cupling 18)+sealing cup 21+ adapter 22+ instrument oil pipe 20 (design length is relevant to position, sand face) to well head, the distance of Design of length have to be larger than the length of horizontal segment, it is ensured that in work progress, sealing cup 21 is in straight well section all the time.
3, connect surface line, continuously circulation and take out sand
Instrument oil pipe 20 outlet connects filter sand tank, and well head four-way connects pump truck；Turn on pump injects liquid, until well head returns liquid and normally and sets up circulation, now liquid flow direction is as shown in Figure 4, uses thereafter continuously circulation wellhead assembly to carry out the not termination of pumping circulation that makes up a joint continuously and takes out sand to artificial bottom of a well.
It is as follows that horizontal well negative pressure takes out sand device operation principle:
Circulation relies on continuously circulation wellhead assembly can realize not termination of pumping and makes up a joint after setting up, now to take out sand device internal flow direction in horizontal well negative pressure the most constant, as shown in Figure 3 for liquid.Well head infusion liquid only has only a few and penetrates (accounting for the 4% of infusion total amount) by spray-hole 10, now can control the flow velocity (general control is at 20m/s～30m/s) at spray-hole 10 according to well head pump delivery, this liquid is directly sprayed onto shaft in wall to carry out snaking and can crush cement, horizontal well negative pressure is taken out the sand setting of sand device 16 front end simultaneously and breaks up to have rushed and be allowed to be in suspended state；The overwhelming majority (accounting for the 96% of infusion total amount) in well head infusion liquid enters nozzle 6 ejection through delivery hole 1 and forms negative pressure, now broken up, broken and that suspend sand grains, dirt, cement are sucked and are entered trunnion 2 through taking out sand hole 13 from taking out sand passage 14, circulate and return out well head together with well head infusion liquid.
In the present embodiment as in Fig. 3 and Fig. 4 arrows direction be liquid flow direction.
The present embodiment uses and concentric oil tubes (27/8Instrument oil pipe+17/8Built-in oil pipe+concentric oil tubes box cupling) process pipe string matching operation, in horizontal segment, establish three passages, 51/2Sleeve pipe 19 and 27/8Instrument oil pipe 20,27/8Instrument oil pipe 20 and 17/8Built-in oil pipe 17 and 17/8Built-in oil pipe 17 is internal; the all technique of early stage only has sleeve pipe two passages internal with instrument oil pipe and instrument oil pipe;, in work progress, circulating liquid does not directly contact with stratum, effectively protects the reservoir problem of leakage during technique source solves horizontal well desanding simultaneously；Horizontal segment inner cycle channel uses concentric oil tubes inner loop simultaneously, reduces and returns out channel cross-sectional area and improve flow velocity and prop-carrying capacity, eliminates sand grains and migrates in horizontal segment to straight well section and again deposit the risk of the process pipe string bit freezing caused.
In sum, this horizontal well negative pressure that the present invention provides takes out sand device by integrated to desanding in pit shaft, snaking, broken cement function and realize one-trip string connection and make, and greatly simplifies working procedure, improves efficiency of construction.
Exemplified as above is only the illustration to the present invention, is not intended that the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention belongs to protection scope of the present invention.
Claims (10)
- null1. a horizontal well negative pressure takes out sand device，It is characterized in that: include urceolus (1)、Trunnion (2)、Central canal (4)、Nozzle (6)、Union joint (7) and baffle plate head (9)，In urceolus (1) is inserted on described union joint (7) top and threaded with it，Described union joint (7) lower end surface is connected with baffle plate head (9)，Described union joint (7) front end outer wall is connected with central canal (4) lower end，Union joint (7) front end endoporus is connected with trunnion (2) lower end，Described trunnion (2) is internal through central canal (4) upper surface from central canal (4)，Described nozzle (6) is placed in the endoporus of trunnion (2) bottom，Nozzle (6) lower surface is against in union joint (7) front end on hole end surface，Annular space is formed between described urceolus (1) inwall and central canal (4) and union joint (7) front end outer wall，Spray-hole (10) it is provided with on described urceolus (1)，Described union joint (7) is internal is provided with central passage (15)，Central passage (15) is provided with multiple delivery hole one (11) communicated with urceolus (1) radially outside，Central passage (15) be provided with axially outside multiple run through union joint (7) take out sand hole (13)，Multiple delivery hole two (12) is set on union joint (7) lower sides，Union joint (7) lower inner wall forms a cavity with baffle plate head (9)，Delivery hole two (12) communicates with this cavity，It is provided with in the cavity that described union joint (7) and baffle plate head (9) are formed and on baffle plate head (9) and multiple takes out sand passage (14).
- 2. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterised in that: it is provided with sealing ring one (3) between described central canal (4) and trunnion (2).
- 3. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterised in that: it is provided with sealing gasket (5) between described central canal (4) and union joint (7).
- 4. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterised in that: it is provided with sealing ring two (8) between described union joint (7) and urceolus (1).
- 5. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterised in that: the axial angle of described spray-hole (10) is 30 °, and radially angle is 20 °.
- 6. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterized in that: described delivery hole one (11) and take out sand hole (13) and all have 3, and delivery hole one (11) and take out that sand hole (13) is circumferentially spaced in union joint (7) to be alternately distributed.
- 7. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterised in that: described nozzle (6) is the pyramidal structure that the little lower bore of upper bore is big.
- 8. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterised in that: for threadeding between described union joint (7) with baffle plate head (9).
- 9. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterised in that: for threadeding between described union joint (7) with central canal (4).
- 10. horizontal well negative pressure as claimed in claim 1 takes out sand device, it is characterised in that: for threadeding between described union joint (7) front end endoporus and trunnion (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510237509.2A CN106285523A (en) | 2015-05-12 | 2015-05-12 | A kind of horizontal well negative pressure takes out sand device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510237509.2A CN106285523A (en) | 2015-05-12 | 2015-05-12 | A kind of horizontal well negative pressure takes out sand device |
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| CN201510237509.2A Pending CN106285523A (en) | 2015-05-12 | 2015-05-12 | A kind of horizontal well negative pressure takes out sand device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941562A (en) * | 2017-12-04 | 2018-04-20 | 李广素 | A kind of hydraulic engineering water quality silt content sampler |
| CN111075772A (en) * | 2019-12-23 | 2020-04-28 | 北京中煤矿山工程有限公司 | Reverse circulation jet pump for residual drilling fluid in ground pre-grouting flowback stratum |
| CN111677469A (en) * | 2020-06-15 | 2020-09-18 | 中煤科工集团西安研究院有限公司 | Negative pressure suction short circuit for nearly horizontal drilling air reverse circulation drilling tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941562A (en) * | 2017-12-04 | 2018-04-20 | 李广素 | A kind of hydraulic engineering water quality silt content sampler |
| CN111075772A (en) * | 2019-12-23 | 2020-04-28 | 北京中煤矿山工程有限公司 | Reverse circulation jet pump for residual drilling fluid in ground pre-grouting flowback stratum |
| CN111075772B (en) * | 2019-12-23 | 2022-02-11 | 北京中煤矿山工程有限公司 | Reverse circulation jet pump for residual drilling fluid in ground pre-grouting flowback stratum |
| CN111677469A (en) * | 2020-06-15 | 2020-09-18 | 中煤科工集团西安研究院有限公司 | Negative pressure suction short circuit for nearly horizontal drilling air reverse circulation drilling tool |
| CN111677469B (en) * | 2020-06-15 | 2022-03-15 | 中煤科工集团西安研究院有限公司 | Negative pressure suction short circuit for nearly horizontal drilling air reverse circulation drilling tool |
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Application publication date: 20170104 |