CN106812496B - Injection device for high-pressure water well - Google Patents
Injection device for high-pressure water well Download PDFInfo
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- CN106812496B CN106812496B CN201510853997.XA CN201510853997A CN106812496B CN 106812496 B CN106812496 B CN 106812496B CN 201510853997 A CN201510853997 A CN 201510853997A CN 106812496 B CN106812496 B CN 106812496B
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- Prior art keywords
- cylinder sleeve
- central tube
- protruding portion
- injection device
- high pressure
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- 238000002347 injection Methods 0.000 title claims abstract description 98
- 239000007924 injection Substances 0.000 title claims abstract description 98
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 30
- 238000012856 packing Methods 0.000 claims description 33
- 239000012530 fluid Substances 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 24
- 208000010040 Sprains and Strains Diseases 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 6
- 238000010306 acid treatment Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010024453 Ligament sprain Diseases 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The invention discloses an injection device for a high-pressure water well, and belongs to the technical field of underground operation tools of oil engineering water wells. The injection device comprises an upper connecting pipe, a central pipe and a lower connecting pipe which are sequentially arranged, wherein a rubber cylinder and an upper cylinder sleeve are sequentially sleeved on the central pipe, the upper cylinder sleeve is mutually connected with the central pipe in a sliding manner, the lower connecting pipe and the upper cylinder sleeve are arranged around the central pipe to form an annular hydraulic cylinder, the annular hydraulic cylinder is communicated with an inner cavity of the central pipe, at least one throttling hole is further formed in the central pipe, and all throttling holes in the at least one throttling hole are communicated with the outside of the injection device. The injection device for the high-pressure water well provided by the invention ensures that the water injection well head does not bear injection pressure by utilizing the existing water injection well process pipe column and the water injection well head, solves the injection problem of the high-pressure water injection well with the well head not moved by the pipe column, is beneficial to improving the working efficiency, reduces the operation cost and protects the water injection well head at the same time.
Description
Technical field
The present invention relates to petroleum works well underground operation tool technical fields, in particular to are used for the injection of high pressure well
Device.
Background technique
At present the country each high pressure well underground injection device there are several types of:
Layer top whole closing appliance (patent publication No. CN102094595A) is injected in high-pressure water injection well underground work, the invention
Belong to oilfield downhole operation implanted layer top full closeding equipment field more particularly to a kind of high-pressure water injection well underground work injection
Layer top whole closing appliance, it includes the automatic sealing mechanism given up, be coupled with tube inner wall, the oil jacket connecting with oil pipe thread
Annular space automatic-sealed anchor mechanism and tail portion water injecting mechanism；The oil jacket annulus automatic-sealed anchor mechanism by rotation tubing string and
Well head applies work and sets pressure and set, and seals oil sets annular space；The automatic sealing mechanism uses one-way valve structures, with
Guarantee that high pressure water cannot be altered from oil pipe in oil reservoir；The packer setting of the tail portion water injecting mechanism, to guarantee multi-zone flow regulating.
Well packer (patent publication No. CN201228533Y) is provided with Y221 anchor, the small spiral shell in top connection lower part
Line couples with the inner tube top of Y221 anchor, is set with hydraulic anchor, seal assembly outside inner tube, under hydraulic anchor top and top connection
The connection of portion's major thread, hydraulic anchor lower part couple with seal assembly top, the cone connection on the Y221 anchor of seal assembly lower part
It connects.There are sealing ring in hydraulic anchor lower part and seal assembly top connection place.After Y221 anchor keeps seal assembly setting, be acidified to
When high pressure acid solution is squeezed on stratum, gap of the high-pressure fluid between seal assembly and inner tube enters, and so that hydraulic anchor is worked, by tubing string
It is anchored on casing, makes to be acidified tubing string bidirectionally anchoring.
Separate layer acid treatment fills the water integral tubular column (patent publication No. CN201269090Y), discloses separate layer acid treatment water filling integral tube
Column meets in water injection well acidizing treatment and acid, examination is replaced to squeeze, be acidified and fill the water in the separate layer acid treatment water injection well of petroleum industry
It needs.This tubing string includes inflatable packer and injection well downhole flow regulator, and inflatable packer is connected with injection well downhole flow regulator by oil pipe, in this tubing string
Bottom end, which is also connected with, replaces liquid device.
Reacting cycle high pressure fracture well packer (patent publication No. CN202970604U), disclosing one kind can be realized by force
Make the reacting cycle high pressure fracture well packer of deblocking.The packer includes central tube, is successively covered from top to bottom on central tube
Equipped with upper rubber tube seat, packing element, lower rubber cylinder seat, hydraulic cylinder, be provided with bushing between packing element and central tube, the upper rubber tube seat with
Bushing is fixedly connected, and the lower rubber cylinder seat is matched with bushing by single-direction transmission structure, the transmission of the single-direction transmission structure
Direction is away from the direction of sealing ring.During deblocking, the active force acted on lower rubber cylinder seat can be acted on by bushing
In upper rubber tube seat, even if upper rubber tube seat can bond together with sealing ring since well packer after setting for a long time, also can
It is enough to force to pull open upper rubber tube seat with sealing ring, so that packing element is in connected state up and down.
Make it can be seen that existing high pressure well injection device injects commonly used in water injection well acidizing treatment in high pressure well
Dynamic tubing string is needed before industry, changes the working procedures such as well head, is influenced job scheduling, is increased operating cost.
Summary of the invention
In order to solve at least one aspect of the above-mentioned problems in the prior art and defect, the present invention provides one kind
Injection device for high pressure well.The technical solution is as follows:
It is an object of the present invention to provide a kind of injection devices for high pressure well.
According to an aspect of the invention, there is provided injection device described in a kind of injection device for high pressure well includes
Upper connector, central tube and the lower connector set gradually is successively set with packing element and upper cylinder sleeve on the central tube, described
Upper cylinder sleeve slides over each other with the central tube and connect, and the lower connector, upper cylinder sleeve are arranged around central tube to form annular liquid
Cylinder, the annular fluid cylinder are connected to the inner cavity of the central tube, at least one throttle orifice, institute are additionally provided on the central tube
All throttle orifices at least one throttle orifice are stated to be connected to the external of the injection device,
When in use, the injection device is put into first oil pipe in the high pressure well, spraining later, it is described to press
Injection device, and it is pumped into liquid in the annular fluid cylinder from the inner cavity of the central tube, to squeeze the packing element compression
Institute of the expansion to seal the toroidal cavity formed between the injection device and the oil pipe, in the inner cavity of the last central tube
It states liquid to flow in the high pressure well by the throttle orifice, to realize the wellhead protecting to high pressure well.
Further, the lower connector includes lower cylinder sleeve and lower baffle ring, and the lower baffle ring is close with the central tube
One end of the upper cylinder sleeve is fixedly connected, and the lower cylinder sleeve is sleeved on the center between the upper cylinder sleeve and the lower baffle ring
Guan Shang, the both ends of the lower cylinder sleeve are fitted closely with the upper cylinder sleeve and the lower baffle ring respectively.
Specifically, it is provided at least one pressure transmission hole on central tube, all pressure transmissions at least one described pressure transmission hole
The one end in hole is connected to the inner cavity of the central tube and the other end is connected to the annular fluid cylinder,
When in use, the liquid is flow in the annular fluid cylinder by the pressure transmission hole from the inner cavity of the central tube.
Further, the upper end medial surface of the upper cylinder sleeve has upper cylinder sleeve protruding portion, the lower end outside of the lower cylinder sleeve
Face has the lower cylinder sleeve protruding portion for limiting the upper cylinder sleeve, and the lower end of the upper cylinder sleeve and the lower cylinder sleeve protruding portion are close
Fitting.
Further, the upper cylinder sleeve protruding portion and lower cylinder sleeve protruding portion are along the radial direction of the central tube to evagination
Out,
The inner surface of the upper cylinder sleeve below the upper cylinder sleeve protruding portion with it is described above the lower cylinder sleeve protruding portion
The outer surface of lower cylinder sleeve slides over each other connection.
Specifically, the annular fluid cylinder by the inner surface of the upper cylinder sleeve below the upper cylinder sleeve protruding portion, lower cylinder sleeve it is upper
End face and the outer surface of the central tube one another around forming,
When in use, the liquid is flow in the annular fluid cylinder by least one described pressure transmission hole, the annular liquid
Upper cylinder sleeve described in liquid-driving in cylinder is moved along the longitudinally of the central tube towards the packing element to squeeze the packing element.
Further, all throttle orifices are arranged at the lower section of all pressure transmission holes.
Further, at least one arc groove is provided on the lower baffle ring, it is all at least one described arc groove
One end of arc groove is connected to the corresponding throttle orifice, and the other end of the arc groove is connected to the toroidal cavity,
When in use, the liquid in the inner cavity of the central tube flow to the arc groove by the throttle orifice, it
The toroidal cavity is flow to by the arc groove afterwards, finally flow to the high pressure well from toroidal cavity.
Further, the arc groove and the throttle orifice are one-to-one relationship.
Further, the upper connector includes the pipe fitting being fixedly secured to one another and upper supervisor, upper supervisor's suit
On the outer surface of the central tube above the packing element, and the lower surface of the upper supervisor and the upper surface of the packing element are tight
Closely connected, the upper inside surface of the upper supervisor is fixedly connected with the lower external face of the pipe fitting.
Specifically, the pipe fitting has the first pipe fitting protruding portion for limiting the upper supervisor with setting described
There is supervisor's protruding portion and setting on first to exist by the second pipe fitting protruding portion below first pipe fitting protruding portion, the upper supervisor
Protruding portion is responsible on second be responsible for below protruding portion on described first, the first pipe fitting protruding portion, the second pipe fitting are prominent
Out portion, be responsible for radial direction of supervisor's protruding portion along the central tube on protruding portion and second on first and protrude outward.
Further, the lower surface of the first pipe fitting protruding portion and the upper surface of the upper supervisor are closely pasted each other
It closes, the upper surface that protruding portion is responsible on the lower surface of the second pipe fitting protruding portion and described first fits closely.
Further, the upper end of the central tube is provided with radially outwardly projecting central tube protruding portion, institute
It states supervisor's protruding portion on central tube protruding portion and described second to be fitted to each other, for limiting the upper supervisor.
Further, the inner surface of the upper supervisor is close between the pipe fitting and the outer surface of central tube respectively
Envelope connection, the inner surface of the upper cylinder sleeve and the outer surface of the central tube are tightly connected each other, the upper cylinder sleeve it is interior
Surface and the outer surface of the lower cylinder sleeve are tightly connected each other.
Specifically, the injection device further includes setting ball, the setting ball and is arranged in the inner cavity of the central tube
Setting ball seat be fitted to each other,
When in use, the injection device is fitted to each other by setting ball and the setting ball seat to realize to the injection
Device is sprained pressure.
Further, the setting ball seat is radially protruded inwardly from by the lower end of the central tube and is formed.
Specifically, the lower section of all throttle orifices is arranged in the setting ball seat.
The beneficial effect of the technical scheme provided by the present invention is that: provided by the present invention for the injection device of high pressure well,
Utilize existing water injection well process pipe string and wellhead of water injection well, it is ensured that water injection well is not subject to injection pressure, solves motionless pipe
The high-pressure water injection well of the motionless well head of column injects problem, helps to improve working efficiency, reduces operating cost, while protecting water injection well
Mouthful.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the injection device according to an embodiment of the invention for high pressure well.
Wherein, 100 injection device for high pressure well, 10 upper connectors, 11 pipe fittings, 111 first pipe fittings are prominent
Portion, 112 second pipe fitting protruding portions are responsible on 12, protruding portion are responsible on 121 first, are responsible for protruding portion on 122 second, in 20
Heart pipe, 21 annular fluid cylinders, 22 throttle orifices, 23 pressure transmission holes, 24 central tube protruding portions, 25 setting ball seats, 30 lower connectors, 31 lower cylinders
It covers, 311 lower cylinder sleeve protruding portions, 32 lower baffle rings, 321 arc grooves, 40 packing elements, cylinder sleeve on 50, cylinder sleeve protruding portion on 51,70 sealings
Circle.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Referring to Fig. 1, it illustrates the injection devices according to an embodiment of the invention for high pressure well.Injection dress
Setting 100 includes upper connector 10, central tube 20 and the lower connector 30 set gradually, is successively set with packing element on central tube 20
40 and upper cylinder sleeve 50, upper cylinder sleeve 50 slides over each other with central tube 20 to be connect, and lower connector 30, upper cylinder sleeve 50 are set around central tube 20
It sets to form annular fluid cylinder 21, annular fluid cylinder 21 is connected to the inner cavity of central tube 20, and at least one is additionally provided on central tube 20
A throttle orifice 22, all throttle orifices 22 at least one throttle orifice 22 are connected to the external of injection device 100.
When in use, in first oil pipe (not shown) injection device 100 being put into high pressure well, pressure injection of spraining later
Enter device 100, and be pumped into liquid in annular fluid cylinder 21 from the inner cavity of central tube 20, thus squeeze 40 compression-expansion of packing element with
The toroidal cavity formed between injection device 100 and oil pipe is sealed, the liquid in the inner cavity of last central tube 20 passes through throttle orifice
22 flow in high pressure well (not shown), to realize the wellhead protecting to high pressure well.
In an example of the invention, injection device 100 further includes setting ball (not shown), and setting ball is used for and setting
Setting ball seat 25 in the inner cavity of central tube 20 is fitted to each other.In another example of the invention, setting ball seat 25 is by center
The lower end of pipe 20 radially protrudes inwardly from and is formed.Certainly it will be understood by those skilled in the art that setting ball seat 25 can be with
It is integrally formed part with central tube 20, i.e., a portion of pipe 20 centered on setting ball seat 25, naturally it is also possible to be individual
Setting ball seat 25 is fixed on central tube 20, those skilled in the art can according to need by component when need to use
It is selected accordingly.
Referring specifically to Fig. 1, upper connector 10 includes the pipe fitting 11 being fixedly secured to one another and upper supervisor 12, upper 12 sets of supervisor
On the outer surface of central tube 20 above packing element 40, and the lower surface of upper supervisor 12 and the upper surface of packing element 40 are closely pasted,
The upper inside surface of upper supervisor 12 is fixedly connected with the lower external face of pipe fitting 11.Lower connector 30 includes lower cylinder sleeve 31 under
Baffle ring 32, lower baffle ring 32 are fixedly connected with one end close to upper cylinder sleeve 50 of central tube 20, and lower cylinder sleeve 31 is sleeved on cylinder sleeve 50
On central tube 20 between lower baffle ring 32, the both ends of lower cylinder sleeve 31 are fitted closely with upper cylinder sleeve 50 and lower baffle ring 32 respectively.
In an example of the invention, pipe fitting 11 has the first pipe fitting protruding portion for limiting upper supervisor 12
111 and the second pipe fitting protruding portion 112 for being arranged in below the first pipe fitting protruding portion 111.Upper supervisor 12 has main on first
Pipe protruding portion 121 and be arranged on first be responsible for protruding portion 121 below second on be responsible for protruding portion 122.In central tube 20
Upper end is provided with the central tube protruding portion 24 for limiting upper supervisor 12.First pipe fitting protruding portion 111, the second pipe fitting are prominent
It is responsible in portion 112, first on protruding portion 121, second and is responsible for protruding portion 122 and central tube protruding portion 24 along the radial direction of central tube
Direction protrudes outward.
The lower surface of first pipe fitting protruding portion 111 and the upper surface of upper supervisor 12 fit closely each other, the second pipe fitting
The upper surface that protruding portion 121 is responsible on the lower surface of protruding portion 112 and first fits closely, and protruding portion 122 is responsible on second
Upper surface and the lower surface of central tube protruding portion 24 fit closely.In another example of the invention, the inner surface of upper supervisor 12
It is tightly connected each other with the outer surface of pipe fitting 11 and central tube 20 respectively, inner surface and the central tube 20 of upper cylinder sleeve 50
Outer surface is tightly connected each other, and the inner surface of upper cylinder sleeve 50 and the outer surface of lower cylinder sleeve 31 are tightly connected each other.
That is, 20 outer surface of upper of central tube has right angle platform terrace, the right angle platform terrace is in upper supervisor 12
Step surface, and for limiting supervisor 12.Right angle cascaded surface of the upper 50 lower part right angle end face of cylinder sleeve outside lower cylinder sleeve 31, under
The right angle end face of 31 lower part of cylinder sleeve abuts the right angle end face of 32 upper end of lower baffle ring, and design in this way can be when in use to upper
Cylinder sleeve 50 is limited.
In another example of the invention, the upper end medial surface of upper cylinder sleeve 50 has upper cylinder sleeve protruding portion 51, lower cylinder sleeve 31
Lower end outside face there is lower cylinder sleeve protruding portion 311 for limiting upper cylinder sleeve 50, the lower end of upper cylinder sleeve 50 and lower cylinder sleeve are prominent
Portion 311 fits closely.The radial direction of upper cylinder sleeve protruding portion 51 and lower cylinder sleeve protruding portion 311 along central tube 20 protrudes outward,
And the outer surface of the lower cylinder sleeve 31 of 311 top of inner surface and lower cylinder sleeve protruding portion of the upper cylinder sleeve 50 of upper 51 lower section of cylinder sleeve protruding portion
Slide over each other connection.When in use, when hydraulic in annular fluid cylinder 21 increases as highly pressurised liquid increases, due to central tube
The cooperation of protruding portion 122 is responsible on protruding portion 24 and second, supervisor's protruding portion 121 on the second pipe fitting protruding portion 112 and first
Cooperation and the first pipe fitting protruding portion 111 and the upper surface of upper supervisor 12 cooperation to the upper supervisor 12 of 40 top of packing element into
Row limit；Simultaneously because the cooperation of upper cylinder sleeve protruding portion 51 and lower cylinder sleeve protruding portion 311, and simultaneously because 31 lower section of lower cylinder sleeve
Lower baffle ring 32 is fixed on central tube 20, realizes the limit to lower cylinder sleeve 31, so that upper cylinder sleeve 50 can pass through annular
That transmits in fluid cylinder 21 is hydraulic by 40 extrusion expansion of packing element.
For example, in order to keep upper supervisor 12 sealingly coupled with each other with pipe fitting 11, it can be by the way that ring be arranged on upper supervisor 12
Shape sealing ring 70, while the annular on the medial surface of upper supervisor 12 along circumferential direction setting for accommodating ring type seal 70 is recessed
Slot, and the junction of upper supervisor 12 and pipe fitting 11 is arranged in the annular groove.Similarly, in order to make it is upper supervisor 12 with central tube 20
Between, be tightly connected between lower cylinder sleeve 31 and upper cylinder sleeve 50 between upper cylinder sleeve 50 and central tube 20, can be correspondingly at center
It is close that annular can be set on pipe protruding portion 24, on the lower cylinder sleeve 31 of 311 top of upper cylinder sleeve protruding portion 51 and lower cylinder sleeve protruding portion
Seal and annular groove for accommodating the ring type seal.
With continued reference to Fig. 1, annular fluid cylinder 21 by 51 lower section of upper cylinder sleeve protruding portion upper cylinder sleeve 50 inner surface, lower cylinder sleeve 31
Upper surface and central tube 20 outer surface one another around forming.Pressure transmission hole of the annular fluid cylinder 21 by design on central tube 20
23 are connected to the inner cavity of central tube 20, thus form the circulation passage that highly pressurised liquid is pumped into annular fluid cylinder 21.In pressure transmission hole 23
It is provided with throttle orifice 22 on central tube 20 between setting ball seat 25, in order to enable throttle orifice 22 and injection device 100
Outside connection, is correspondingly provided with the arc groove 321 being connected to throttle orifice 22, that is to say, that arc groove 321 on lower baffle ring 32
One end be connected to throttle orifice 22, the external of the other end and injection device 100 is connected to.
In an example of the invention, pressure transmission hole 23, throttle orifice 22 and arc groove 321 are disposed as 3, and 3 biographies
Pressure hole 23 is evenly distributed in the outer surface of upper of central tube 20, and 23 interlaced 60 degree of the pressure transmission hole of 3 Φ 7.3 sections
Discharge orifice 22 is evenly distributed in the lower external face of central tube 20, and 22 interlaced 60 degree of the throttle orifice of 3 Φ 4.Accordingly
Ground, design has 3 equally distributed arc grooves 321, and 3 circular arcs on the outer surface of corresponding lower baffle ring 32 at the throttle orifice 22
It is 321 interlaced 60 degree of slot, identical as 22 radial distribution of throttle orifice.In another example of the invention, the aperture of arc groove 321
Greater than the aperture of throttle orifice 22, it in this way according to Throttle Principle when in use can be that packing element 40 provides a chock pressure difference, thus
Avoid the seal failure between packing element 40 and oil pipe (not shown).Certain those skilled in the art are apparent that.Pressure transmission hole 23, section
Discharge orifice 22 and arc groove 321 can be set to 1,5 or more, those skilled in the art can according to the actual situation into
The corresponding selection of row, those skilled in the art are further appreciated that throttle orifice 22 and the number of arc groove 321 can be designed as equal numbers
Amount, can also be not designed to equal amount, people from this field can according to need to be selected accordingly, as long as can be realized throttling
Hole 22 is connected to the external of injection device 100.
The tool of injection device 100 is further illustrated below by the working principle of the present invention is described in detail injection device 100
Body structure.
In assembly, the connection buckle on 11 top of pipe fitting is regular screw threads, 11 lower part of pipe fitting and 12 common spiral shells of upper supervisor
Line connection, upper supervisor 12, packing element 40, upper cylinder sleeve 50 and lower cylinder sleeve 31 are successively sleeved on the appearance of central tube 20 from top to bottom later
On face, and the lower inner surface of upper cylinder sleeve 50 is sleeved in lower 31 outer surface of upper of cylinder sleeve, at this point, upper cylinder sleeve 50 and lower cylinder sleeve 31
Between form annular fluid cylinder 21, and the pressure transmission hole 23 of annular fluid cylinder 21 and central tube 20 is formed for being pumped into highly pressurised liquid
Circulation passage.
Then lower baffle ring 32 and 20 lower part of central tube are connected to each other by regular screw threads, while make 32 appearance of lower baffle ring
The arc groove 321 of EDS maps is connected to provide stabilization for liquid communication, and to packing element 40 with the throttle orifice 22 of central tube 20
Pressure.
When injecting operation, the injection device 100 with pressure that will be used for high pressure well send the oil pipe suspension in supreme pumped well
Inside first oil pipe under device, the steel ball (i.e. setting ball) of 17-19mm is delivered from ground later, steel ball is made to fall into central tube 20
On the setting ball seat 25 of lower inner surface, sealed section thus is formed between setting ball and setting ball seat 25.Then it is filled to injection
It sets and is pumped into highly pressurised liquid in 100, a part in highly pressurised liquid is flowed out outside injection device 100 by throttle orifice 22, another part
Highly pressurised liquid due to setting ball sprain pressure and remained in injection device 100 so that the highly pressurised liquid in injection device 100
Gradually increase.
When the highly pressurised liquid increased reaches the height of pressure transmission hole 23, highly pressurised liquid flows into annular fluid cylinder by pressure transmission hole 23
In 21.Then annular fluid cylinder 21 in highly pressurised liquid gradually increase, be arranged in 40 both ends of packing element upper supervisor 12 and lower cylinder sleeve 31
Limit so that upper cylinder sleeve 50 can push packing element 40 along central tube 20 longitudinally upwards (such as institute in Fig. 1 page
The up and down direction of the priming device 100 shown) parallel upward sliding, so that packing element 40 be made to be squeezed compression swelling.Compressed packing element 40
Outer surface be close to tube inner wall, toroidal cavity is formed between injection device and oil pipe to seal.
Improve to the highly pressurised liquid of injection device 100 simultaneously and be pumped into discharge capacity, enable highly pressurised liquid heavily through
The throttle orifice 22 of central tube 20 injects in toroidal cavity, according to Throttle Principle, to packing element 40 produce it is stable set pressure difference, from
And the failure for preventing packing element 40 to seal.
After injecting operation, discharging borehole pressure (pressure i.e. in injection device 100), 40 elasticity of packing element is restored, thus
Naturally original shape is recoiled to, while the right angle end face (lower surface of i.e. upper cylinder sleeve protruding portion 51) of 50 lower part of upper cylinder sleeve retracts extremely
The cascaded surface (descending the upper surface of cylinder sleeve protruding portion 311) of lower cylinder sleeve 31, can unseal, and complete injection operation.
Existing water injection well process pipe string and water injection well well are utilized provided by the present invention for the injection device of high pressure well
Mouthful, it is ensured that water injection well is not subject to injection pressure, solves the problems, such as the high-pressure water injection well injection of the motionless well head of fixed tubular column, helps
In improving working efficiency, operating cost is reduced, while protecting water injection well.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (17)
1. a kind of injection device for high pressure well, which is characterized in that
The injection device includes the upper connector set gradually, central tube and lower connector, is successively covered on the central tube
Equipped with packing element and upper cylinder sleeve, the upper cylinder sleeve slides over each other with the central tube to be connect, during the lower connector, upper cylinder sleeve surround
To form annular fluid cylinder, the annular fluid cylinder is connected to the inner cavity of the central tube, also sets on the central tube setting of heart pipe
It is equipped at least one throttle orifice, outside of all throttle orifices with the injection device at least one described throttle orifice connects
It is logical,
When in use, the injection device is put into first oil pipe in the high pressure well, sprains press the injection later
Device, and it is pumped into liquid in the annular fluid cylinder from the inner cavity of the central tube, to squeeze the packing element compression-expansion
The liquid to seal the toroidal cavity formed between the injection device and the oil pipe, in the inner cavity of the last central tube
Body is flow in the high pressure well by the throttle orifice, to realize the wellhead protecting to high pressure well；
First oil pipe is located at the well head of the high pressure well.
2. the injection device according to claim 1 for high pressure well, which is characterized in that
The lower connector includes lower cylinder sleeve and lower baffle ring, and the lower baffle ring is with the central tube close to the one of the upper cylinder sleeve
End is fixedly connected, and the lower cylinder sleeve is sleeved on the central tube between the upper cylinder sleeve and the lower baffle ring, the lower cylinder
The both ends of set are fitted closely with the upper cylinder sleeve and the lower baffle ring respectively.
3. the injection device according to claim 2 for high pressure well, which is characterized in that
Be provided at least one pressure transmission hole on central tube, at least one described pressure transmission hole one end of all pressure transmission holes with
The inner cavity of the central tube is connected to and the other end is connected to the annular fluid cylinder,
When in use, the liquid is flow in the annular fluid cylinder by the pressure transmission hole from the inner cavity of the central tube.
4. the injection device according to claim 3 for high pressure well, which is characterized in that
The upper end medial surface of the upper cylinder sleeve has upper cylinder sleeve protruding portion, and the lower end outside face of the lower cylinder sleeve has for limiting
The lower cylinder sleeve protruding portion of the upper cylinder sleeve, the lower end of the upper cylinder sleeve are fitted closely with the lower cylinder sleeve protruding portion.
5. the injection device according to claim 4 for high pressure well, which is characterized in that
The radial direction of the upper cylinder sleeve protruding portion and lower cylinder sleeve protruding portion along the central tube protrudes outward,
The lower cylinder above the inner surface of the upper cylinder sleeve below the upper cylinder sleeve protruding portion and the lower cylinder sleeve protruding portion
The outer surface of set slides over each other connection.
6. the injection device according to claim 5 for high pressure well, which is characterized in that
It is described annular fluid cylinder by below the upper cylinder sleeve protruding portion the inner surface of upper cylinder sleeve, the upper surface of lower cylinder sleeve and it is described in
The outer surface of heart pipe one another around forming,
When in use, the liquid is flow in the annular fluid cylinder by least one described pressure transmission hole, in the annular fluid cylinder
Liquid-driving described in upper cylinder sleeve move along the longitudinally of the central tube towards the packing element to squeeze the packing element.
7. the injection device according to claim 6 for high pressure well, which is characterized in that
All throttle orifices are arranged at the lower section of all pressure transmission holes.
8. the injection device according to claim 7 for high pressure well, which is characterized in that
Be provided at least one arc groove on the lower baffle ring, one end of all arc grooves at least one described arc groove with
The corresponding throttle orifice connection, the other end of the arc groove are connected to the toroidal cavity,
When in use, the liquid in the inner cavity of the central tube flow to the arc groove, Zhi Houtong by the throttle orifice
It crosses the arc groove and flow to the toroidal cavity, finally flow to the high pressure well from toroidal cavity.
9. the injection device according to claim 8 for high pressure well, which is characterized in that
The arc groove and the throttle orifice are one-to-one relationship.
10. the injection device according to claim 9 for high pressure well, which is characterized in that
The upper connector includes the pipe fitting being fixedly secured to one another and upper supervisor, and the upper supervisor is sleeved on above the packing element
The central tube outer surface on, and the lower surface of the upper supervisor and the upper surface of the packing element are closely pasted, the upper master
The upper inside surface of pipe is fixedly connected with the lower external face of the pipe fitting.
11. the injection device according to claim 10 for high pressure well, which is characterized in that
The pipe fitting has the first pipe fitting protruding portion for limiting the upper supervisor with setting in first pipe fitting
The second pipe fitting protruding portion below protruding portion, the upper supervisor have supervisor's protruding portion on first and are arranged on described first
Below supervisor's protruding portion second on be responsible for protruding portion, the first pipe fitting protruding portion, the second pipe fitting protruding portion, on first
Radial direction of supervisor's protruding portion along the central tube protrudes outward on supervisor's protruding portion and second.
12. the injection device according to claim 11 for high pressure well, which is characterized in that
The lower surface of the first pipe fitting protruding portion and the upper surface of the upper supervisor fit closely each other, and second pipe connects
The upper surface that protruding portion is responsible on the lower surface and described first of head protruding portion fits closely.
13. the injection device according to claim 12 for high pressure well, which is characterized in that
The upper end of the central tube is provided with radially outwardly projecting central tube protruding portion, the central tube protruding portion
With described second on supervisor protruding portion be fitted to each other, for limiting the upper supervisor.
14. the injection device according to claim 13 for high pressure well, which is characterized in that
The inner surface of the upper supervisor respectively with the pipe fitting and the outer surface of central tube each other be tightly connected, it is described on
The inner surface of cylinder sleeve and the outer surface of the central tube are tightly connected each other, the inner surface of the upper cylinder sleeve and the lower cylinder
The outer surface of set is tightly connected each other.
15. the injection device of high pressure well is used for described in any one of -14 according to claim 1, which is characterized in that
The injection device further includes setting ball, the setting ball and the setting ball seat that is arranged in the inner cavity of the central tube that
This cooperation,
When in use, the injection device is fitted to each other by setting ball and the setting ball seat to realize to the injection device
It sprains pressure.
16. the injection device according to claim 15 for high pressure well, which is characterized in that
The setting ball seat is radially protruded inwardly from by the lower end of the central tube and is formed.
17. the injection device according to claim 16 for high pressure well, which is characterized in that
The lower section of all throttle orifices is arranged in the setting ball seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510853997.XA CN106812496B (en) | 2015-11-30 | 2015-11-30 | Injection device for high-pressure water well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510853997.XA CN106812496B (en) | 2015-11-30 | 2015-11-30 | Injection device for high-pressure water well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106812496A CN106812496A (en) | 2017-06-09 |
| CN106812496B true CN106812496B (en) | 2019-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510853997.XA Active CN106812496B (en) | 2015-11-30 | 2015-11-30 | Injection device for high-pressure water well |
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| Country | Link |
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| CN (1) | CN106812496B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116201512B (en) * | 2023-02-14 | 2024-05-24 | 新疆敦华绿碳技术股份有限公司 | Carbonate reservoir oil displacement method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2670597Y (en) * | 2003-12-17 | 2005-01-12 | 彭红英 | Injector of water well |
| CN1888380A (en) * | 2006-08-02 | 2007-01-03 | 大庆油田有限责任公司 | Combined injection device |
| CN102094595A (en) * | 2010-12-17 | 2011-06-15 | 中国石油集团长城钻探工程有限公司 | Totally-enclosed device for upper part of injection layer of downhole operation of high-pressure water injection well |
| CN203867512U (en) * | 2014-05-14 | 2014-10-08 | 天津市滨海新区龙新石油机械制造有限公司 | Hydraulic expansion and self-locking seal type well-flushable packer |
| US8863823B1 (en) * | 2013-11-25 | 2014-10-21 | Anatoli Nikouline | Universal underground hydro-slotting perforation system controlled by working fluid pressure for activation and intensification of gas, oil, and hydro-geological wells |
-
2015
- 2015-11-30 CN CN201510853997.XA patent/CN106812496B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2670597Y (en) * | 2003-12-17 | 2005-01-12 | 彭红英 | Injector of water well |
| CN1888380A (en) * | 2006-08-02 | 2007-01-03 | 大庆油田有限责任公司 | Combined injection device |
| CN102094595A (en) * | 2010-12-17 | 2011-06-15 | 中国石油集团长城钻探工程有限公司 | Totally-enclosed device for upper part of injection layer of downhole operation of high-pressure water injection well |
| US8863823B1 (en) * | 2013-11-25 | 2014-10-21 | Anatoli Nikouline | Universal underground hydro-slotting perforation system controlled by working fluid pressure for activation and intensification of gas, oil, and hydro-geological wells |
| CN203867512U (en) * | 2014-05-14 | 2014-10-08 | 天津市滨海新区龙新石油机械制造有限公司 | Hydraulic expansion and self-locking seal type well-flushable packer |
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| Publication number | Publication date |
|---|---|
| CN106812496A (en) | 2017-06-09 |
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