CN107780893A - A kind of Shallow Heavy Oil Reservoir completion tubular column - Google Patents
A kind of Shallow Heavy Oil Reservoir completion tubular column Download PDFInfo
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- CN107780893A CN107780893A CN201610722272.1A CN201610722272A CN107780893A CN 107780893 A CN107780893 A CN 107780893A CN 201610722272 A CN201610722272 A CN 201610722272A CN 107780893 A CN107780893 A CN 107780893A
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- screen casing
- casing
- tube
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- horizontal
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Classifications
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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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/08—Methods or apparatus for cleaning boreholes or wells cleaning in situ of down-hole filters, screens, e.g. casing perforations, or gravel packs
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
Abstract
The present invention discloses a kind of Shallow Heavy Oil Reservoir completion tubular column, including production casing, the horizontal segment of production casing is connected with two primary screen casings, oil pick-up tube is fixed with by packer in production casing vertical section, the horizontal ends of oil pick-up tube freely extend in the net horizontal section that two primary screen casings and sleeve pipe are formed, and two level screen casing is provided with the horizontal segment of oil pick-up tube；The sieve aperture of two level screen casing includes reducing section, flat segments and impact section, reduces section internal diameter and radially outward successively decreases along two level screen casing, impact section internal diameter radially outward successively decreases along two level screen casing.In horizontal well, it is divided into three parts by two external packer of pipe bore holes, i.e., the fluid in horizontal well is entered around oil pick-up tube by two primary screen casings respectively；Now, it is transported to respectively by the two level screen casing on oil pumping pipe end and oil pick-up tube horizontal segment in production casing vertical section top by the fluid entered in two primary screen casings, and then completes the segmentation exploitation of horizontal well.
Description
Technical field
The invention belongs to horizontal well production technical field, more particularly to a kind of Shallow Heavy Oil Reservoir completion tubular column.
Background technology
Viscous crude is the important component in the petroleum hydrocarbon energy, and its feature is as follows：
（1）Colloid in viscous crude is high with bitumen content, and light fraction is seldom.And with resin and asphalt
Content increases the relative density of viscous crude and viscosity and also accordingly increased.
（2）The viscosity of viscous crude is for very temperature sensitive, and with the increase of temperature, viscosity drastically declines.And
Viscosity of crude is bigger, and this change is more obvious.
（3）The hetero atom such as sulphur, oxygen, nitrogen is more in viscous crude.
（4）Paraffin content is typically relatively low in viscous crude, but it is " double high oil fields ", i.e. asphalt content also to have only a few oil field
Height, paraffin content are also high, are characterized as the high condensation point crude oil of high viscosity.
（5）Same heavy crude reservoir, oil property usually have very in the different well sections and plane of vertical oil reservoir between each well
Big difference.
With horizontal well drilling completion and the constantly improve of production technique, horizontal well be advantageous to improve well yield, increase can
Adopt reserves and improve oil recovery rate, horizontal well development technology is applied to various types of oil reservoirs at present.For the sandstone of homogeneous
Or for Carbonate Reservoir, traditional barefoot completion, primary sieve tube completion, perforation completion mode can give horizontal well development band
Carry out some problems.Because level of production section is longer, being influenceed by pit shaft friction drag, the producing pressure differential of whole horizontal segment is different,
Heel end producing pressure differential is maximum, and toe-end producing pressure differential is minimum, and it is uneven to ultimately result in horizontal segment production liquid, or even toe-end occurs and do not produce liquid
Situation, significantly impact the development effectiveness of horizontal well.
The content of the invention
The invention reside in a kind of Shallow Heavy Oil Reservoir completion tubular column is provided, reduce the producing pressure differential of heel end, amplify toe-end
Producing pressure differential, horizontal segment relatively evenly output is realized, so as to realize that horizontal well in segments is exploited.
The present invention's is achieved through the following technical solutions：
A kind of Shallow Heavy Oil Reservoir completion tubular column, includes the production casing of L-shaped, and the horizontal segment of the production casing is connected with two
Primary screen casing, sleeve pipe are arranged between two primary screen casings, and L-shaped is fixed with by packer in the production casing vertical section
Oil pick-up tube, packer in pipe is installed in sleeve pipe, the horizontal ends of the oil pick-up tube are in two the primary screen casings and set
The net horizontal section that pipe is formed freely extends, and two level screen casing, the two level screen casing face end are provided with the horizontal segment of oil pick-up tube
The primary screen casing being connected with production casing horizontal segment, two external packer of pipe, and two pipe coverings are installed outside sleeve pipe
Bore hole is separated into three parts every device；The sieve aperture of the two level screen casing includes the diminution being radially outward sequentially connected along two level screen casing
Section, flat segments and impact section, the diminution section internal diameter radially outward successively decrease along two level screen casing, and the impact section internal diameter sieves along two level
Pipe radially outward successively decreases, and the primary screen casing includes the base tube that multiple fuel feed holes are provided with outer wall, along the base tube axially at it
Be provided with multiple ribs on outer circle wall, and along base tube circle on multiple ribs interval be wound with wrapping wire, it is adjacent
Two ribs between be filled with the block foamed iron of triangle, it is and solid being welded with the middle part of the isometrical conveyor screw on inwall
It is fixed to enclose, rotated on retainer plate inner peripheral wall and be provided with multiple balls, include the guide rail of annular, the guide rail circumferentially passes through along base tube
Wear in the middle part of multiple ribs, and the annular groove with multiple ball engagements is provided with guide rail outer circle wall.
In the prior art, in the thermal process of viscous crude, the horizontal segment of horizontal well is longer, the friction drag of horizontal well toe-end
It is bigger, ultimately result in that the production liquid of horizontal segment is uneven, i.e., the heel end of horizontal segment differs with toe-end producing pressure differential, has a strong impact on water
The oil recovery efficiency of horizontal well, for this problem, the present invention is divided into horizontal well by two external packer of pipe bore holes
Three parts, i.e., the fluid in horizontal well are entered around oil pick-up tube by two primary screen casings respectively；Now, by two primary sieves
The fluid entered in pipe is transported to production casing by the two level screen casing on oil pumping pipe end and oil pick-up tube horizontal segment respectively
In vertical section top, and then complete the segmentation exploitation of horizontal well.The present invention utilizes segmentation exploitation so that is produced positioned at horizontal well toe-end
The frictional resistance of liquid reduces, and is exaggerated the producing pressure differential of toe-end, while increases the frictional resistance of horizontal well heel end production liquid, reduces heel end
Producing pressure differential, horizontal segment production liquid relatively evenly output is realized, caused by efficiently solving conventional horizontal well completion mode
Horizontal segment production liquid is uneven, the problem of toe-end does not produce liquid even occurs, realizes the balanced production liquid of horizontal segment, the exploitation for well of improving the standard
Effect.And the filtering that the fluid in the bore hole of production casing end passes through primary screen casing and two level screen casing so that most
The solid concentration for entering fluid in oil pick-up tube eventually minimizes, and when carrying out clean-out service to horizontal completion in the later stage of recovering the oil,
Flushing fluid is injected in production casing, oil pick-up tube, primary screen casing and two level screen casing are cleaned by flushing fluid, ensures water
Oil recovery efficiency of the flat completion in later stage recovery process；
Wherein, flushing fluid by production casing when being entered in oil pick-up tube, because formation pressure is larger, the flushing fluid in oil pick-up tube
The resistance outwards sprayed is accordingly larger, for two primary screen casings, secondary sieve of the flushing fluid on by oil pick-up tube horizontal segment
Pipe is injected into the primary screen casing of production casing side, now by flushing fluid to outside the primary screen casing of secondary screen casing face
Spray to realize that the effect for the sieve aperture dredged on primary screen casing is difficult to realize, therefore, inventor is carried out to the sieve aperture of two level screen casing
Improve, i.e., the sieve aperture of two level screen casing includes the diminution section, flat segments and the impact section that are sequentially connected, and reduces section and impact section
Internal diameter radially outward successively decreasing along two level screen casing, and the internal diameter of flat segments then keeps constant, when flushing fluid in oil pick-up tube by overflowing
When going out, flushing fluid after the diminishing of flow cross suddenly, and its flow velocity can be continuously increased, by gentle in flat segments
Transition, accelerated again in impact section, at the same time, in horizontal well oil reservoir it is relative to the pressure in two level screen casing with it is general
It is low for logical sieve aperture, i.e., finally primary screen casing is carried out being kept its fast state by the flushing fluid overflowed in impact section
Wash away, while the solid phase particles being blocked on two level screen casing and primary screen casing are then rushed by the flushing fluid with powerful impact dynamics
Walk so that two level screen casing and primary screen casing keep the unobstructed of its sieve aperture.
During work, base tube is placed in the horizontal segment of horizontal completion, and viscous crude enters wrapping wire by wire spacing and formed with sleeve pipe
Gap in, after the filtration by foamed iron, substrate tube is entered by fuel feed hole, to realize the pumping of fluid；
In the prior art, steam flooding technology is used when being exploited to viscous crude, i.e., steam injection well and producing well are set above oil reservoir,
Constantly passing through steam in steam injection well so that steam constantly heats the stratum around pit shaft, while the crude oil in stratum is also heated,
The steam zone progressively extended with the continuous injection of steam is formed in the stratum of near wellbore, steam can be by containing in steam zone
Saturation degree drops to relatively low degree, and by flowable crude oil（That is the difference of initial oil saturation and residual oil saturation）Displace
Steam zone；At the same time, in the horizontal segment of horizontal completion, steam consumingly moves to updip direction, and under the force of gravity,
Heated crude oil is driven onto and had a down dip reversely, and the increase of the temperature with crude oil, profit and gravel in horizontal completion horizontal segment
It will be seethed with excitement Deng mixture, and cause crude oil to be degraded（Disturbance caused by the boiling of mixture）, the mixing of profit and solid phase
Thing starts by entering substrate tube in horizontal completion horizontal segment, and wrapping wire is a complete metal bar and is wound on by interval
On multiple ribs, the primary filter unit to the major diameter solid phase such as gravel in profit is formed, and foam iron rule is formed to small straight
The secondary filter unit of footpath solid phase, to realize the sand control purpose of base tube；Also, when in horizontal completion horizontal segment by liquid pressure
When power and the self-contained heat of profit influence and cause to produce pressure change, formed between adjacent two ribs
Secondary filter section is compressed, but filled with multiple foamed irons block in triangle, foamed iron in the secondary filter section
After stress deforms upon, the runner of multiple irregular geometric figures can be still formed in secondary filter section for oil mixing with water
Thing is by the way that and foamed iron inner duct stress occurs minor variations and being not easy and is blocked dead, while foamed iron has certain bullet
Property, the duct in elasticity recovery deformation in foamed iron resets, and to maintain the percolation ability in secondary filter section, ensures viscous crude
Smooth exploitation.
Further, when oil water mixture enters in base tube, because the whole level that oil water mixture moves and drives is complete
The motion of fluid in well horizontal segment, and by horizontal segment fluid apply the isometrical spiral shell formed to wrapping wire in all directions
The pressure revolved on body is different, when isometrical conveyor screw both sides discontinuity equalization, passes through the mutual cunning between ball and annular groove
It is dynamic to coordinate so that isometrical conveyor screw starts slow rotation outside base tube, and is now partly connected in isometrical conveyor screw gap
The solid phases such as sand grains can directly drop with the rotation and washing away for oil water mixture of isometrical conveyor screw, avoid on isometrical conveyor screw
There is serious clogging, ensure the stability of oil-feed in base tube.
It is incremented by successively in the length of the diminution section, flat segments and impact section in two level screen casing radially.Reduce section, put down
The length of straight section and impact section in two level screen casing radially is directly connected to jet velocity of the flushing fluid on two level screen casing, i.e.,
Flushing fluid speed acceleration in sieve aperture is more, and the impact dynamics to primary screen casing is then bigger, and section, flat segments are reduced in the present invention
And radially outward increasing of the length of impact section along two level screen casing so that acceleration time of the flushing fluid in sieve aperture extends, and ensures
The momentum during injection of flushing fluid can be fully erased by the solid phase particles on primary screen casing and two level screen casing, ensures in level
The stable output of completion later stage exploitation production liquid.
Also include giving up, described give up is connected by screw thread with packer upper end.Giving up can be direct after being connected with packer
Docked with the pumping pipe string in protective casing, while packer insulates the vertical portion of first paragraph oil pipe into upper and lower two
Part, and oilhole is opened in bottom, gives up positioned at top so that oilhole is being flowed into by the production liquid flowed into first paragraph primary screen casing
Afterwards, directly mixed with by the production liquid phase flowed into second segment oil pipe, concentrate on give up it is interior after be extracted outside well.
Also include multiple reinforcements, multiple reinforcements axially and are distributed on wrapping wire in a ring along the base tube.
In the horizontal segment of horizontal completion, wrapping wire is not only by the pressure of oil reservoir, and pressure moment change with the change of reservoir temperature,
I.e. during the abrupt change of pressure, wrapping wire is highly prone to damage, and the present invention by set on wrapping wire it is multiple in a ring
The reinforcement of distribution so that the first filter element that wrapping wire is formed stably is supported, to tackle in horizontal completion in horizontal segment
Continually changing production pressure, while extend the service life of its own.
TiALN-WC/C layers are scribbled on the wrapping wire outer wall.Preferably, TiALN-WC/C is set to apply in wrapping wire outer wall
Layer, and the coefficient of friction of TiALN-WC/C coatings only has 0.1, when the solid phases such as sand grains constantly contact with wrapping wire, can greatly drop
Low frictional dissipation between the two, and self lubricity is carried, greatly ensure service life of the wrapping wire in horizontal completion.
Also include connector, the both ends of the base tube are connected by connector with blind pipe respectively.Preferably, according to reality
The needs of oil recovery, base tube is connected by connector with blind pipe, facilitates the pumping of crude oil, and the abandoning tradition blind pipe in laying
The mode directly welded with base tube, wrapping wire is directly changed when wrapping wire damages and without being carried out integrally to base tube, wrapping wire to facilitate
Change, reduce the production cost of thickened oil recovery.
Multiple balls are rounded and array distribution is on the inner peripheral wall of the retainer plate.Preferably, multiple rollings
Pearl is evenly distributed on the inner peripheral wall of retainer plate, i.e., more balanced in the support of the isometrical conveyor screw formed to wrapping wire, and
And when isometrical conveyor screw freely rotates outside base tube, isometrical conveyor screw will not be caused stress raisers occur, reduce wrapping wire
While damage, ensure the oil-feed efficiency in base tube.
The present invention compared with prior art, has the following advantages and advantages：
The filtering that fluid of the present invention in the bore hole of production casing end passes through primary screen casing and two level screen casing so that most
The solid concentration for entering fluid in oil pick-up tube eventually minimizes, and when carrying out clean-out service to horizontal completion in the later stage of recovering the oil,
Flushing fluid is injected in production casing, oil pick-up tube, primary screen casing and two level screen casing are cleaned by flushing fluid, ensures water
Oil recovery efficiency of the flat completion in later stage recovery process.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the structural representation of two level screen casing sieve aperture；
Fig. 3 is the structural representation of primary screen casing；
Fig. 4 is the longitdinal cross-section diagram of primary screen casing.
Mark and corresponding parts title in accompanying drawing：
1- production casings, 2- sleeve pipes, 3- external packer of pipe, 4- primary screen casing, 5- give up, in 6- packers, 7- oil pick-up tubes, 8- pipes
Packer, 9- bore holes, 10- protective casings, 11- two levels screen casing, 111- impact sections, 112- flat segments, 113- reduce section, A- with
End, B- toe-ends, 12- reinforcements, 13- wrapping wires, 14- ribs, 15- base tubes, 16- fuel feed holes, 17- connectors, 18- blind pipes, 19-
Foamed iron, 20- retainer plates, 21- guide rails, 22- balls.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As shown in Figures 1 to 4, the present embodiment includes the production casing 2 of L-shaped, and the horizontal segment of the production casing 2 is connected with two
Primary screen casing, sleeve pipe 2 are arranged between two primary screen casings, are fixed with the vertical section of production casing 2 by packer 6
The oil pick-up tube 7 of L-shaped, packer 8 in pipe are installed in sleeve pipe 2, the horizontal ends of the oil pick-up tube 7 are in two primary screen casings
And the net horizontal section that sleeve pipe 2 is formed freely extends, two level screen casing 11, the two level sieve are provided with the horizontal segment of oil pick-up tube 7
The primary screen casing that the face end of pipe 11 is connected with the horizontal segment of production casing 2, two external packer of pipe 3 are installed outside sleeve pipe 2, and
Bore hole 9 is separated into three parts by two external packer of pipe 3；The sieve aperture of the two level screen casing 11 is included along the footpath of two level screen casing 11
To the diminution section 113, flat segments 112 and impact section 111 being outwards sequentially connected, the internal diameter of section 113 that reduces is along two level screen casing 11
Radially outward successively decrease, the internal diameter of impact section 111 radially outward successively decreases along two level screen casing 11, and the primary screen casing 4 includes outer wall
On be provided with the base tubes 15 of multiple fuel feed holes 16, multiple ribs 14 are axially provided with its outer circle wall along the base tube 15,
And along base tube 15 justify on multiple ribs 14 interval be wound with wrapping wire 13, filled between adjacent two ribs 14
Have in the block foamed iron 19 of triangle, and be welded with retainer plate 20 in the middle part of the isometrical conveyor screw on inwall, in retainer plate 20
Rotated in circumferential wall and be provided with multiple balls 22, include the guide rail 21 of annular, the guide rail 21 is circumferential through multiple along base tube 4
The middle part of ribs 3, and the annular groove coordinated with multiple balls 22 is provided with the outer circle wall of guide rail 21.
In the prior art, in the thermal process of viscous crude, the horizontal segment of horizontal well is longer, and horizontal well toe-end B's rubs along journey
Resistance is bigger, ultimately results in that the production liquid of horizontal segment is uneven, i.e. the heel end A of horizontal segment differs with toe-end B producing pressure differentials, serious shadow
The oil recovery efficiency of Xiangshui County's horizontal well, for this problem, the present invention passes through two quilts of 3 bore hole of external packer of pipe 9 in horizontal well
Three parts are divided into, i.e., the fluid in horizontal well is entered around oil pick-up tube 7 by two primary screen casings respectively；Now, by two
The fluid entered in individual primary screen casing is defeated by the two level screen casing 11 on the end of oil pick-up tube 7 and the horizontal segment of oil pick-up tube 7 respectively
Deliver in the vertical section top of production casing 2, and then complete the segmentation exploitation of horizontal well.The present invention utilizes segmentation exploitation so that position
Reduce in the frictional resistance of horizontal well toe-end B production liquid, be exaggerated toe-end B producing pressure differential, while increase horizontal well heel end A production liquid
Frictional resistance, heel end A producing pressure differential is reduced, realize horizontal segment production liquid relatively evenly output, efficiently solve conventional levels
Horizontal segment production liquid caused by well completion mode is uneven, the problem of toe-end B does not produce liquid even occurs, realizes the balanced production of horizontal segment
Liquid, the development effectiveness for well of improving the standard.And the fluid in the bore hole 9 of the end of production casing 2 by primary screen casing and
The filtering of two level screen casing 11 so that the solid concentration for entering eventually into fluid in oil pick-up tube 7 minimizes, and in the later stage pair of recovering the oil
When horizontal completion carries out clean-out service, the injection flushing fluid in the production casing 2, by flushing fluid to oil pick-up tube 7, primary screen casing with
And two level screen casing 11 is cleaned, ensure oil recovery efficiency of the horizontal completion in later stage recovery process；
Wherein, flushing fluid by production casing 2 when being entered in oil pick-up tube 7, because formation pressure is larger, washing in oil pick-up tube 7
The resistance that well liquid outwards sprays is accordingly larger, for two primary screen casings, flushing fluid on by the horizontal segment of oil pick-up tube 7 two
Secondary screen casing is injected into the primary screen casing of the side of production casing 2, now the primary by flushing fluid to secondary screen casing face
Sprayed outside screen casing to realize that the effect for the sieve aperture dredged on primary screen casing is difficult to realize, therefore, inventor is to two level screen casing 11
Sieve aperture is improved, i.e., the sieve aperture of two level screen casing 11 includes diminution section 113, flat segments 112 and the impact section 111 being sequentially connected,
And internal diameter radially outward the successively decreasing along two level screen casing 11 of section 113 and impact section 111 is reduced, and the internal diameter of flat segments 112
Then keep constant, when flushing fluid is by overflowing in oil pick-up tube 7, after the diminishing suddenly of flow cross, it flows flushing fluid
Speed can be continuously increased, and by the gentle transition in flat segments 112, be accelerated again in impact section 111, same with this
When, oil reservoir is relative to the pressure in two level screen casing 11 low with for common sieve aperture in horizontal well, i.e., finally by impact section 111
The flushing fluid of spilling keep its fast state start to wash away primary screen casing, while be blocked in two level screen casing 11 and just
Solid phase particles on level screen casing are then washed away by the flushing fluid with powerful impact dynamics so that two level screen casing 11 and primary screen casing
Keep the unobstructed of its sieve aperture.
During work, base tube 15 is placed in the horizontal segment of horizontal completion, and viscous crude enters wrapping wire 13 and set by the gap of wrapping wire 13
In the gap that pipe is formed, after the filtration of foamed iron 19, entered by fuel feed hole 16 inside base tube 15, to realize
The pumping of fluid；In the prior art, steam flooding technology is used when being exploited to viscous crude, i.e., steam injection well is set above oil reservoir
And producing well, constantly pass through steam in steam injection well so that steam constantly heats the stratum around pit shaft, while the original in stratum
Oil is also heated, and the steam zone progressively extended with the continuous injection of steam is formed in the stratum of near wellbore, and steam can incite somebody to action
Relatively low degree is dropped to containing saturation degree in steam zone, and by flowable crude oil（That is initial oil saturation and residual oil saturation
The difference of degree）Displace steam zone；At the same time, in the horizontal segment of horizontal completion, steam consumingly moves to updip direction, and
Under the force of gravity, heated crude oil is driven onto and had a down dip reversely, and the increase of the temperature with crude oil, in horizontal completion horizontal segment
The mixture such as profit and gravel will seethe with excitement, and cause crude oil to be degraded（Disturbance caused by the boiling of mixture）, profit with
And the mixture of solid phase starts by being entered in horizontal completion horizontal segment inside base tube 15, wrapping wire 13 is a complete metal bar
And be wound on by interval on multiple ribs 14, the primary filter unit to the major diameter solid phase such as gravel in profit is formed, and
Foamed iron 19 then forms the secondary filter unit to minor diameter solid phase, to realize the sand control purpose of base tube 15；Also, when level
It is adjacent when being influenceed in completion horizontal segment by fluid pressure and the self-contained heat of profit and causing to produce pressure change
Two ribs 14 between the secondary filter section that is formed compressed, but be in filled with multiple in the secondary filter section
The block foamed iron 19 of triangle, foamed iron 19 can still be formed in secondary filter section and multiple do not advised after stress deforms upon
Then the runner of geometric figure for oil water mixture by, and the inner duct stress of foamed iron 19 occur minor variations and be not easy
Blocked, while foamed iron 19 has certain elasticity, the duct in elasticity recovery deformation in foamed iron 19 resets, to maintain
Percolation ability in secondary filter section, ensure the smooth exploitation of viscous crude.
Further, when oil water mixture enters in base tube 4, because the whole level that oil water mixture moves and drives is complete
The motion of fluid in well horizontal segment, and by horizontal segment fluid apply in all directions to wrapping wire 2 formed it is isometrical
Pressure on conveyor screw is different, when isometrical conveyor screw both sides discontinuity equalization, passes through the phase between ball 22 and annular groove
Mutually it is slidably matched so that isometrical conveyor screw starts slow rotation outside base tube 4, and is now partly connected to isometrical conveyor screw gap
The solid phases such as interior sand grains can directly drop with the rotation and washing away for oil water mixture of isometrical conveyor screw, avoid isometrical spiral
Occur serious clogging on body, ensure the stability of oil-feed in base tube 4.
Preferably, in the length of the diminution section 113, flat segments 112 and impact section 111 in two level screen casing 11 radially
Spend incremented by successively.The length of section 113, flat segments 112 and impact section 111 in two level screen casing 11 radially is reduced to be directly connected to
Jet velocity of the flushing fluid on two level screen casing 11, i.e. the flushing fluid speed in sieve aperture accelerate more, the impact to primary screen casing
Dynamics is then bigger, and radial direction of the length of section 113, flat segments 112 and impact section 111 along two level screen casing 11 is reduced in the present invention
Outwards increase so that acceleration time of the flushing fluid in sieve aperture extends, and ensures that the momentum during injection of flushing fluid can sieve primary
Solid phase particles on pipe and two level screen casing 11 are fully erased, ensure to exploit the stable output of production liquid in the horizontal completion later stage.
The present embodiment also includes giving up 5, and described give up 5 is connected by screw thread with the upper end of packer 6.Give up 5 with packer 6
Directly it can be docked after connection with the post of oil pick-up tube 7 in protective casing 10, while packer 6 is by the vertical portion of first paragraph oil pipe
Upper and lower two parts are insulated into, and oilhole is opened in bottom, giving up 5 is located at top so that by being flowed into first paragraph primary screen casing
Production liquid after oilhole is flowed into, directly mixed with by the production liquid phase flowed into second segment oil pipe, concentrate on after giving up in 5 and be extracted
Outside well.
The present embodiment also includes multiple reinforcements 12, and multiple reinforcements 12 divide axially and in a ring along the base tube 15
Cloth is on wrapping wire 13.In the horizontal segment of horizontal completion, wrapping wire 13 is not only by the pressure of oil reservoir, and the pressure is with reservoir temperature
Change and the moment change, i.e., during the abrupt change of pressure, wrapping wire 13 is highly prone to damage, and the present invention by around
Multiple reinforcements 12 being distributed in a ring are set on silk 13 so that the first filter element that wrapping wire 13 is formed stably is supported,
To tackle in horizontal completion continually changing production pressure in horizontal segment, while extend the service life of its own.
Preferably, TiALN-WC/C coatings are set in the outer wall of wrapping wire 13, and the coefficient of friction of TiALN-WC/C coatings is only
Have 0.1, when the solid phases such as sand grains constantly contact with wrapping wire 13, can greatly reduce frictional dissipation between the two, and with certainly
Lubricity, greatly ensure service life of the wrapping wire 13 in horizontal completion.
Preferably, according to the needs actually to recover the oil, base tube 15 is connected by connector 17 with blind pipe 18, facilitates crude oil
Pumping, and the mode that abandoning tradition blind pipe 18 directly welds with base tube 15 in laying, to facilitate when wrapping wire 13 damages
Wrapping wire 13 is directly changed without carrying out integral replacing to base tube 15, wrapping wire 13, reduces the production cost of thickened oil recovery.
Preferably, multiple balls 22 are rounded and array distribution is on the inner peripheral wall of the retainer plate 20.It is more
Individual ball 22 is evenly distributed on the inner peripheral wall of retainer plate 20, i.e., the isometrical conveyor screw formed to wrapping wire 2 support more
Add equilibrium, and when isometrical conveyor screw freely rotates outside base tube 4, isometrical conveyor screw will not be caused local stress collection occur
In, while reducing the damage of wrapping wire 2, ensure the oil-feed efficiency in base tube 4.
Above-described embodiment, the purpose of the present invention, technical scheme and beneficial effect are carried out further
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc., all should include
Within protection scope of the present invention.
Claims (7)
1. a kind of Shallow Heavy Oil Reservoir completion tubular column, include the production casing of L-shaped（1）, it is characterised in that：The production casing
（1）Horizontal segment be connected with two primary screen casings（4）, sleeve pipe（2）It is arranged on two primary screen casings（4）Between, in the production
Sleeve pipe（1）Pass through packer in vertical section（6）It is fixed with the oil pick-up tube of L-shaped（7）, in sleeve pipe（2）Packer in pipe is inside installed
（8）, the oil pick-up tube（7）Horizontal ends in two primary screen casings（4）And sleeve pipe（2）The net horizontal section of composition freely prolongs
Stretch, oil pick-up tube（7）Horizontal segment on be provided with two level screen casing（11）, the two level screen casing（11）Face end and production casing
（1）The primary screen casing of horizontal segment connection（4）, in sleeve pipe（2）Two external packer of pipe are installed outside（3）, and outside two pipes
Packer（3）By bore hole（9）It is separated into three parts；The two level screen casing（11）Sieve aperture include along two level screen casing（11）Radially to
The diminution section being sequentially connected outside（113）, flat segments（112）And impact section（111）, the diminution section（113）Internal diameter sieves along two level
Pipe（11）Radially outward successively decrease, the impact section（111）Internal diameter is along two level screen casing（11）Radially outward successively decrease, the primary screen casing
（4）Including being provided with multiple fuel feed holes on outer wall（16）Base tube（15）, along the base tube（15）Axially set on its outer circle wall
It is equipped with multiple ribs（14）, and along base tube（15）Circle is in multiple ribs（14）Upper interval is wound with wrapping wire（13）,
Two adjacent ribs（14）Between be filled with the block foamed iron of triangle（19）, and it is interior in the middle part of the isometrical conveyor screw
Retainer plate is welded with wall（20）, retainer plate（20）Rotated on inner peripheral wall and be provided with multiple balls（22）, in addition to annular
Guide rail（21）, the guide rail（21）Along base tube（4）It is circumferential to run through multiple ribs（3）Middle part, and in guide rail（21）Outer circle wall
On be provided with and multiple balls（22）The annular groove of cooperation.
A kind of 2. Shallow Heavy Oil Reservoir completion tubular column according to claim 1, it is characterised in that：The diminution section（113）、
Flat segments（112）And impact section（111）In two level screen casing（11）Length radially is incremented by successively.
A kind of 3. Shallow Heavy Oil Reservoir completion tubular column according to claim 1, it is characterised in that：Also include giving up（5）, institute
State and give up（5）Pass through screw thread and packer（6）Upper end connects.
A kind of 4. Shallow Heavy Oil Reservoir completion tubular column according to claim 1, it is characterised in that：Also include multiple reinforcements
（12）, multiple reinforcements（12）Along the base tube（15）It is distributed in axially and in a ring wrapping wire（13）On.
A kind of 5. Shallow Heavy Oil Reservoir completion tubular column according to claim 1, it is characterised in that：In the wrapping wire（13）Outside
TiALN-WC/C layers are scribbled on wall.
A kind of 6. Shallow Heavy Oil Reservoir completion tubular column according to claim 1, it is characterised in that：Also include connector
（17）, the base tube（15）Both ends pass through connector respectively（17）With blind pipe（18）Connection.
A kind of 7. Shallow Heavy Oil Reservoir completion tubular column according to claim 1, it is characterised in that：Multiple balls（22）
Rounded and array distribution is in the retainer plate（20）Inner peripheral wall on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722272.1A CN107780893A (en) | 2016-08-25 | 2016-08-25 | A kind of Shallow Heavy Oil Reservoir completion tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610722272.1A CN107780893A (en) | 2016-08-25 | 2016-08-25 | A kind of Shallow Heavy Oil Reservoir completion tubular column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107780893A true CN107780893A (en) | 2018-03-09 |
Family
ID=61389137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610722272.1A Withdrawn CN107780893A (en) | 2016-08-25 | 2016-08-25 | A kind of Shallow Heavy Oil Reservoir completion tubular column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107780893A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309460A (en) * | 2021-05-18 | 2021-08-27 | 中国地质大学（武汉） | Oil-gas well fracturing filling well reconstruction drilling method and device |
| CN113464100A (en) * | 2021-08-02 | 2021-10-01 | 山东科技大学 | Deep sea hydrate exploitation sand control screen pipe blocking improvement system and application method |
| US11898421B2 (en) * | 2022-04-27 | 2024-02-13 | Southwest Petroleum University | Sand control device for marine hydrate production |
-
2016
- 2016-08-25 CN CN201610722272.1A patent/CN107780893A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309460A (en) * | 2021-05-18 | 2021-08-27 | 中国地质大学（武汉） | Oil-gas well fracturing filling well reconstruction drilling method and device |
| CN113464100A (en) * | 2021-08-02 | 2021-10-01 | 山东科技大学 | Deep sea hydrate exploitation sand control screen pipe blocking improvement system and application method |
| US11898421B2 (en) * | 2022-04-27 | 2024-02-13 | Southwest Petroleum University | Sand control device for marine hydrate production |
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| PB01 | Publication | ||
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Application publication date: 20180309 |
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| WW01 | Invention patent application withdrawn after publication |