CN106812496A - Injection device for high-pressure water well - Google Patents
Injection device for high-pressure water well Download PDFInfo
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- CN106812496A CN106812496A CN201510853997.XA CN201510853997A CN106812496A CN 106812496 A CN106812496 A CN 106812496A CN 201510853997 A CN201510853997 A CN 201510853997A CN 106812496 A CN106812496 A CN 106812496A
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- cylinder sleeve
- protuberance
- central tube
- injection device
- high pressure
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- 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
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Infusion, Injection, And Reservoir Apparatuses (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 field, more particularly to for high pressure well
Injection device.
Background technology
Current domestic each high pressure well underground injection device has following several：
Layer top whole closing appliance (patent publication No. CN102094595A) is injected in high-pressure water injection well underground work,
The invention belongs to oilfield downhole operation implanted layer top full closeding equipment field, more particularly to a kind of pressure injection high
Well underground work injection layer top whole closing appliance, it includes that what is be connected with oil pipe thread gives up and oil pipe
Automatic sealing mechanism, oil jacket annular space automatic-sealed anchor mechanism and afterbody water injecting mechanism that inwall is connected；The oil
Set annular space automatic-sealed anchor mechanism is sealed by rotating tubing string and well head applying work sets pressure and sets
Oil sets annular space；The automatic sealing mechanism uses one-way valve structures, to ensure that oil reservoir inner high voltage water can not be from
Altered on oil pipe；The packer setting of the afterbody water injecting mechanism, to ensure multi-zone flow regulating.
Well packer (patent publication No. CN201228533Y), is provided with Y221 anchors, above connects
Head bottom minor thread couples with the inner tube top of Y221 anchors, and hydraulic anchor, seal assembly are set with outside inner tube,
Hydraulic anchor top couples with top connection bottom major thread, and hydraulic anchor bottom couples with seal assembly top, sealing
Cone connection on the Y221 anchors of assembly bottom.Hydraulic anchor bottom has close with seal assembly top connection place
Seal.After Y221 anchors make seal assembly setting, it is acidified when squeezing into high pressure acid solution to stratum, high-pressure spray
Gap of the body between seal assembly and inner tube enters, and hydraulic anchor is worked, and tubing string is anchored on sleeve pipe,
Make acidifying tubing string bidirectionally anchoring.
Separate layer acid treatment water filling integral tubular column (patent publication No. CN201269090Y), discloses separate layer acid treatment note
Water integral tubular column, in the separate layer acid treatment water injection well of petroleum industry, meets replacing in water injection well acidizing treatment
Acid, examination are squeezed, acidifying and water filling need.This tubing string includes inflatable packer and injection well downhole flow regulator, expanding packing
Device and injection well downhole flow regulator are connected by oil pipe, are also connected with replacing liquid device in the bottom of this tubing string.
Reacting cycle high pressure fracture well packer (patent publication No. CN202970604U), discloses a kind of energy
Enough reacting cycle high pressure fracture well packers for realizing forcing deblocking.The packer includes central tube, at center
Glue tube base, packing element, lower rubber cylinder seat, hydraulic cylinder are arranged with pipe successively from top to bottom, at packing element and center
Bushing is provided between pipe, the upper glue tube base is fixedly connected with bushing, the lower rubber cylinder seat passes through with bushing
Single-direction transmission structure is engaged, and the transmission direction of the single-direction transmission structure is away from the direction of sealing ring.
During deblocking, the active force acted on lower rubber cylinder seat can be acted on upper glue tube base by bushing, even if
Because well packer is after long-time sets, upper glue tube base can bond together with sealing ring, it is also possible to strong
System pulls open upper glue tube base and sealing ring, packing element is in connected state up and down.
As can be seen here, existing high pressure well injection device is generally used for water injection well acidizing treatment in high pressure well
Dynamic tubing string is needed before injection operation, the working procedures such as well head are changed, job scheduling is influenceed, increases operating cost.
The content 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 is provided
A kind of injection device for high pressure well.The technical scheme is as follows：
It is an object of the present invention to provide a kind of injection device for high pressure well.
According to an aspect of the invention, there is provided injecting dress described in a kind of injection device for high pressure well
Upper connecting tube, central tube and lower connecting tube including setting gradually are put, is set with successively on the central tube
Packing element and upper cylinder sleeve, the upper cylinder sleeve slide over each other with the central tube and are connected, the lower connecting tube, upper cylinder half
Set sets to form annular fluid cylinder around central tube, the inner space of the annular fluid cylinder and the central tube,
At least one throttle orifice, all throttlings at least one throttle orifice are additionally provided with the central tube
The ft connection of injection device described in Kong Junyu,
When in use, in the first oil pipe injection device being put into the high pressure well, sprain afterwards
The injection device is pressed, and liquid is pumped into the annular fluid cylinder from the inner chamber of the central tube, so that
The packing element compression-expansion is extruded to seal the toroidal cavity formed between the injection device and the oil pipe,
The liquid in the inner chamber of the last central tube is flow in the high pressure well by the throttle orifice, with
Realize the wellhead protecting to high pressure well.
Further, the lower connecting tube includes lower cylinder sleeve and lower baffle ring, the lower baffle ring and the central tube
One end of close described upper cylinder sleeve be fixedly connected, the lower cylinder sleeve is sleeved on the upper cylinder sleeve and the lower block
On the central tube between ring, the two ends of the lower cylinder sleeve are tight with the upper cylinder sleeve and the lower baffle ring respectively
Closely connected conjunction.
Specifically, at least one pressure transmission hole is provided with central tube, is owned at least one pressure transmission hole
One end of pressure transmission hole connected with the annular fluid cylinder with the inner space and the other end of the central tube,
When in use, the liquid flow to the annular liquid from the inner chamber of the central tube by the pressure transmission hole
In cylinder.
Further, the upper end medial surface of the upper cylinder sleeve has upper cylinder sleeve protuberance, under the lower cylinder sleeve
End lateral surface have for the spacing upper cylinder sleeve lower cylinder sleeve protuberance, the lower end of the upper cylinder sleeve with it is described
Lower cylinder sleeve protuberance is brought into close contact.
Further, the upper cylinder sleeve protuberance and lower cylinder sleeve protuberance are along the radial direction of the central tube
Outwardly,
Above the inner surface of the described upper cylinder sleeve below the upper cylinder sleeve protuberance and the lower cylinder sleeve protuberance
The outer surface of the lower cylinder sleeve slides over each other connection.
Specifically, the annular fluid cylinder by the upper cylinder sleeve below the upper cylinder sleeve protuberance inner surface, lower cylinder
The outer surface of the upper surface of set and the central tube one another around forming,
When in use, the liquid is flow in the annular fluid cylinder by least one pressure transmission hole, described
Upper cylinder sleeve is moved along the longitudinally of the central tube towards the packing element described in liquid-driving in annular fluid cylinder
To extrude 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 with the lower baffle ring, at least one arc groove
All arc grooves one end and the connection of the corresponding throttle orifice, the other end of the arc groove and the ring
Shape cavity is connected,
When in use, the liquid in the inner chamber of the central tube flow to the circular arc by the throttle orifice
Groove, flow to the toroidal cavity by the arc groove afterwards, finally flow to the water under high pressure from toroidal cavity
Well.
Further, the arc groove and the throttle orifice are one-to-one relationship.
Further, the upper connecting tube includes the pipe joint being fixedly secured to one another and upper supervisor, the upper master
On the outer surface of the central tube of the pipe sleeve above the packing element, and the upper supervisor lower surface and institute
The upper surface for stating packing element is closely pasted, the upper inside surface of the upper supervisor and the lower external face of the pipe joint
It is fixedly connected.
Specifically, the pipe joint has the first pipe joint protuberance for the spacing upper supervisor and setting
The second pipe joint protuberance below the first pipe joint protuberance, the upper supervisor has main on first
Protuberance, described first are responsible on pipe protuberance and second be arranged on described first below supervisor's protuberance
Pipe joint protuberance, the second pipe joint protuberance, it is responsible on protuberance and second that to be responsible for protuberance equal on first
Along the central tube radial direction outwardly.
Further, the lower surface of the first pipe joint protuberance is tight each other with the upper surface of the upper supervisor
Closely connected conjunction, the upper surface that protuberance is responsible on the lower surface of the second pipe joint protuberance and described first is tight
Closely connected conjunction.
Further, the central tube being provided with radially outwardly in the upper end of the central tube is protruded
Portion, is responsible for protuberance and is fitted to each other, for the spacing upper master on the central tube protuberance and described second
Pipe.
Further, the inner surface of the upper supervisor is respectively with the outer surface of the pipe joint and central tube each other
Between be tightly connected, be tightly connected between the inner surface of the upper cylinder sleeve and the outer surface of the central tube,
It is tightly connected between the inner surface of the upper cylinder sleeve and the outer surface of the lower cylinder sleeve.
Specifically, the injection device also include setting ball, the setting ball be arranged on the central tube
Setting ball seat in inner chamber is fitted to each other,
When in use, the injection device is fitted to each other to realize to institute by setting ball with the setting ball seat
Injection device is stated to sprain pressure.
Further, the setting ball seat is radially protruded inwardly from by the lower end of the central tube and formed.
Specifically, the setting ball seat is arranged on the lower section of all throttle orifices.
The beneficial effect of technical scheme that the present invention is provided is：Provided by the present invention for the injection of high pressure well
Device, using 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
Power, solves the high-pressure water injection well injection problem of the motionless well head of fixed tubular column, is favorably improved operating efficiency,
Operating cost is reduced, while protecting water injection well.
Brief description of the drawings
Fig. 1 is the structural representation of the injection device for high pressure well according to an embodiment of the invention.
Wherein, 100 are used for the injection device of high pressure well, connecting tube on 10,11 pipe joints, 111 first pipes
Joint protuberance, 112 second pipe joint protuberances are responsible on 12, and protuberance, 122 are responsible on 121 first
Protuberance, 20 central tubes, 21 annular fluid cylinders, 22 throttle orifices, 23 pressure transmission holes, 24 centers are responsible on second
Pipe protuberance, 25 setting ball seats, 30 times connecting tubes, 31 times cylinder sleeves, 311 times cylinder sleeve protuberances, 32 lower blocks
Ring, 321 arc grooves, 40 packing elements, cylinder sleeve on 50, cylinder sleeve protuberance on 51,70 sealing rings.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Implementation method is described in further detail.
Referring to Fig. 1, it illustrates the injection device for high pressure well according to an embodiment of the invention.
Injection device 100 includes the upper connecting tube 10, central tube 20 and the lower connecting tube 30 that set gradually, at center
Packing element 40 and upper cylinder sleeve 50 are set with pipe 20 successively, upper cylinder sleeve 50 slides over each other with central tube 20 and is connected,
Lower connecting tube 30, upper cylinder sleeve 50 set to form annular fluid cylinder 21, annular fluid cylinder 21 around central tube 20
With the inner space of central tube 20, at least one throttle orifice 22, at least one are additionally provided with central tube 20
All throttle orifices 22 in individual throttle orifice 22 with the ft connection of injection device 100.
When in use, injection device 100 is put into first oil pipe (not shown) in high pressure well,
Pressure of spraining afterwards injection device 100, and liquid is pumped into annular fluid cylinder 21 from the inner chamber of central tube 20, from
And extrude the compression-expansion of packing element 40 to seal the toroidal cavity formed between injection device 100 and oil pipe, finally
Liquid in the inner chamber of central tube 20 is flow in high pressure well (not shown) by throttle orifice 22, to realize
To the wellhead protecting of high pressure well.
In an example of the invention, injection device 100 also includes setting ball (not shown), and setting ball is used
Setting ball seat 25 in the inner chamber of centrally disposed pipe 20 is fitted to each other.In another example of the invention
In, setting ball seat 25 is radially protruded inwardly from by the lower end of central tube 20 and formed.Certain this area
Technical staff is it will be appreciated that setting ball seat 25 can be formed in one part, i.e. setting ball seat with central tube 20
A portion of pipe 20 centered on 25, naturally it is also possible to be single part, when needing to use, will sit
Blocking seat 25 is fixed on central tube 20, and those skilled in the art can be carried out accordingly as needed
Selection.
Referring specifically to Fig. 1, upper connecting tube 10 includes the pipe joint 11 being fixedly secured to one another and upper supervisor 12,
Upper supervisor 12 is sleeved on the outer surface of the central tubes 20 of the top of packing element 40, and upper supervisor 12 lower surface
Upper surface with packing element 40 is closely pasted, the lower external face of the upper upper inside surface and pipe joint 11 for being responsible for 12
It is fixedly connected.Lower connecting tube 30 includes lower cylinder sleeve 31 and lower baffle ring 32, lower baffle ring 32 and central tube 20
One end near upper cylinder sleeve 50 is fixedly connected, and lower cylinder sleeve 31 is sleeved between cylinder sleeve 50 and lower baffle ring 32
Central tube 20 on, the two ends of lower cylinder sleeve 31 are brought into close contact with upper cylinder sleeve 50 and lower baffle ring 32 respectively.
In an example of the invention, pipe joint 11 has the first pipe joint for spacing upper supervisor 12
Protuberance 111 and the second pipe joint protuberance 112 being arranged on below the first pipe joint protuberance 111.Upper master
Pipe 12 has to be responsible for protuberance 121 and is arranged on first on be responsible for the lower section of protuberance 121 second on first
Supervisor's protuberance 122.The upper end of central tube 20 is provided with the central tube protuberance for supervisor 12 on spacing
24.On first pipe joint protuberance 111, the second pipe joint protuberance 112, first be responsible for protuberance 121,
Be responsible on second protuberance 122 and central tube protuberance 24 along central tube radial direction outwardly.
The lower surface of the first pipe joint protuberance 111 is brought into close contact each other with the upper surface of upper supervisor 12, and second
The upper surface that protuberance 121 is responsible on the lower surface of pipe joint protuberance 112 and first is brought into close contact, and second
The upper surface of upper supervisor's protuberance 122 is brought into close contact with the lower surface of central tube protuberance 24.Of the invention
In another example, the inner surface of upper supervisor 12 respectively with the outer surface of pipe joint 11 and central tube 20 each other it
Between be tightly connected, be tightly connected between the inner surface of upper cylinder sleeve 50 and the outer surface of central tube 20, on
It is tightly connected between the inner surface of cylinder sleeve 50 and the outer surface of lower cylinder sleeve 31.
That is, the outer surface of upper of central tube 20 has right angle platform terrace, the right angle platform terrace abuts upper supervisor
Step surface in 12, and for spacing upper supervisor 12.The bottom right angle end face of upper cylinder sleeve 50 abuts lower cylinder sleeve 31
Outside right angle cascaded surface, the right angle end face of the lower bottom of cylinder sleeve 31 abuts the right angle end face of the upper end of lower baffle ring 32,
Upper cylinder sleeve 50 can be carried out when in use by such design spacing.
In another example of the invention, the upper end medial surface of upper cylinder sleeve 50 has upper cylinder sleeve protuberance 51, under
The lower end outside face of cylinder sleeve 31 has the lower cylinder sleeve protuberance 311 for spacing upper cylinder sleeve 50, upper cylinder sleeve 50
Lower end be brought into close contact with lower cylinder sleeve protuberance 311.Upper cylinder sleeve protuberance 51 and lower cylinder sleeve protuberance 311 are equal
Along central tube 20 radial direction outwardly, and the upper cylinder sleeve 50 of the lower section of upper cylinder sleeve protuberance 51 interior table
Face slides over each other with the outer surface of the lower cylinder sleeve 31 of the top of lower cylinder sleeve protuberance 311 and is connected.When in use, when
When hydraulic pressure in annular fluid cylinder 21 increases as highly pressurised liquid increases, due to central tube protuberance 24 and
The cooperation of protuberance 122 is responsible on two, supervisor's protuberance 121 on the second pipe joint protuberance 112 and first
Cooperation and the first pipe joint protuberance 111 and the upper surface of upper supervisor 12 cooperation to the top of packing element 40
Upper supervisor 12 carry out it is spacing；Simultaneously because the cooperation of upper cylinder sleeve protuberance 51 and lower cylinder sleeve protuberance 311,
And simultaneously because the lower baffle ring 32 of the lower section of lower cylinder sleeve 31 is fixed on central tube 20, realize to lower cylinder sleeve 31
It is spacing so that upper cylinder sleeve 50 can by annular fluid cylinder 21 transmit hydraulic pressure packing element 40 be extruded
Expansion.
For example, in order that upper supervisor is 12 sealingly coupled with each other with pipe joint 11,12 can be responsible for by upper
Upper setting O-ring seal 70, while being provided for receiving ring along circumferential direction on the medial surface of upper supervisor 12
The annular groove of shape sealing ring 70, and the annular groove is arranged on the junction of supervisor 12 and pipe joint 11.
Similarly, in order that between upper supervisor 12 and central tube 20, between upper cylinder sleeve 50 and central tube 20 and lower cylinder
Set 31 and upper cylinder sleeve 50 between be tightly connected, can correspondingly on central tube protuberance 24, on cylinder sleeve dash forward
O-ring seal can be set on the lower cylinder sleeve 31 for going out portion 51 and the top of lower cylinder sleeve protuberance 311 and be used for
Accommodate the annular groove of the O-ring seal.
With continued reference to Fig. 1, annular fluid cylinder 21 by the lower section of upper cylinder sleeve protuberance 51 upper cylinder sleeve 50 inner surface,
The upper surface of lower cylinder sleeve 31 and the outer surface of central tube 20 are one another around forming.Annular fluid cylinder 21 is by design
Pressure transmission hole 23 and the inner space of central tube 20 on central tube 20, thus form highly pressurised liquid and pump into
The circulation passage of annular fluid cylinder 21.Set on central tube 20 between pressure transmission hole 23 and setting ball seat 25
Have throttle orifice 22, in order that throttle orifice 22 can with the ft connection of injection device 100, correspondingly in lower block
The arc groove 321 connected with throttle orifice 22 is provided with ring 32, that is to say, that one end of arc groove 321 and section
Discharge orifice 22 is connected, the ft connection of the other end and injection device 100.
In an example of the invention, pressure transmission hole 23, throttle orifice 22 and arc groove 321 are disposed as 3,
And 3 pressure transmission holes 23 are evenly distributed in the outer surface of upper of central tube 20, and 3 pressure transmission holes of Φ 7
23 interlaced 60 degree.3 throttle orifices 22 are evenly distributed in the lower external face of central tube 20, and
3 22 interlaced 60 degree of throttle orifices of Φ 4.Correspondingly, the corresponding lower baffle ring 32 at throttle orifice 22
Outer surface on be designed with 3 equally distributed arc grooves 321, and 3 arc grooves 321 interlaced 60
Degree is identical with the radial distribution of throttle orifice 22.In another example of the invention, the aperture of arc groove 321 is big
In the aperture of throttle orifice 22, so can be according to Throttle Principle when in use for packing element 40 provides a throttling
Pressure difference, so as to avoid the seal failure between packing element 40 and oil pipe (not shown).Certain people in the art
Member is apparent that.Pressure transmission hole 23, throttle orifice 22 and arc groove 321 could be arranged to 1,5 or more
Multiple, those skilled in the art can accordingly be selected according to actual conditions, and those skilled in the art can be with
Understand, throttle orifice 22 can be designed as equal amount with the number of arc groove 321, it is also possible to be not designed to phase
Etc. quantity, people from this area can be selected accordingly as needed, as long as throttle orifice 22 can be realized with note
Enter the ft connection of device 100.
Injection device 100 is further illustrated below by the operation principle for describing injection device 100 of the present invention in detail
Concrete structure.
In assembling, the junction button on the top of pipe joint 11 is regular screw threads, the bottom of pipe joint 11 and upper supervisor
12 regular screw threads are connected, afterwards upper supervisor 12, packing element 40, upper cylinder sleeve 50 and lower cylinder sleeve 31 from top to bottom according to
It is secondary to be sleeved on the outer surface of central tube 20, and the lower inner surface of upper cylinder sleeve 50 is sleeved on lower cylinder sleeve 31
On portion outer surface, now, annular fluid cylinder 21, and annular are formd between upper cylinder sleeve 50 and lower cylinder sleeve 31
Fluid cylinder 21 forms the circulation passage for pumping into highly pressurised liquid with the pressure transmission hole 23 of central tube 20.
Then lower baffle ring 32 is connected to each other with the bottom of central tube 20 by regular screw threads, while so that lower block
The arc groove 321 of the appearance EDS maps of ring 32 is connected for liquid communication with the throttle orifice 22 of central tube 20,
And provide steady pressure to packing element 40.
When operation is injected, the oil that will be delivered to for the injection device 100 of high pressure well in high pressure well with pressure
Inside first oil pipe under pipe hanger, the steel ball (i.e. setting ball) of 17-19mm is delivered from ground afterwards,
Steel ball is set to fall on the setting ball seat 25 of the lower inner surface of central tube 20, thus setting ball and setting ball seat 25
Between form sealed section.Then to pumping into highly pressurised liquid in injection device 100, in highly pressurised liquid
Divide and flowed out outside injection device 100 by throttle orifice 22, another part highly pressurised liquid is sprained due to setting ball and pressed and quilt
In remaining in injection device 100, so that the highly pressurised liquid in injection device 100 gradually increases.
When the highly pressurised liquid for increasing reaches the height of pressure transmission hole 23, highly pressurised liquid is flowed into by pressure transmission hole 23
In annular fluid cylinder 21.Then the highly pressurised liquid in annular fluid cylinder 21 gradually increases, and is arranged on the two ends of packing element 40
Upper supervisor 12 and lower cylinder sleeve 31 it is spacing so that upper cylinder sleeve 50 can promote packing element 40 in
(above-below direction of the priming device 100 as shown in Fig. 1 pages) is parallel upwards for the longitudinally of heart pipe 20
Upward sliding, so that packing element 40 is squeezed compression swelling.It is close in oil pipe the outer surface of the packing element 40 after compression
Wall, toroidal cavity is formed so as to seal between injection device and oil pipe.
That improves the highly pressurised liquid to injection device 100 simultaneously pumps into discharge capacity so that highly pressurised liquid can be a large amount of
Ground is injected in toroidal cavity by the throttle orifice 22 of central tube 20, according to Throttle Principle, packing element 40 is produced
Stabilization sets pressure difference, so as to the failure for preventing packing element 40 to seal.
After operation is injected, borehole pressure (pressure i.e. in injection device 100), the elasticity of packing element 40 are discharged
Recover, so that original shape is recoiled to naturally, while the right angle end face of the bottom of upper cylinder sleeve 50 (goes up cylinder sleeve to dash forward
Go out the lower surface in portion 51) retract to the cascaded surface (descending the upper surface of cylinder sleeve protuberance 311) of lower cylinder sleeve 31,
Can deblocking, completion injection operation.
Injection device provided by the present invention for high pressure well utilizes existing water injection well process pipe string and water filling
Well well head, it is ensured that water injection well is not subject to inject pressure, solves the high pressure water injection of the motionless well head of fixed tubular column
Well injects problem, is favorably improved operating efficiency, reduces operating cost, while protecting water injection well.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all of the invention
Within spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in of the invention
Within protection domain.
Claims (17)
1. a kind of injection device for high pressure well, it is characterised in that
The injection device includes the upper connecting tube, central tube and the lower connecting tube that set gradually, at the center
Packing element and upper cylinder sleeve are set with pipe successively, the upper cylinder sleeve slides over each other with the central tube and is connected, described
Lower connecting tube, upper cylinder sleeve set to form annular fluid cylinder, the annular fluid cylinder and the center around central tube
The inner space of pipe, is additionally provided with least one throttle orifice, at least one throttling on the central tube
All throttle orifices in hole with the ft connection of the injection device,
When in use, in the first oil pipe injection device being put into the high pressure well, sprain afterwards
The injection device is pressed, and liquid is pumped into the annular fluid cylinder from the inner chamber of the central tube, so that
The packing element compression-expansion is extruded to seal the toroidal cavity formed between the injection device and the oil pipe,
The liquid in the inner chamber of the last central tube is flow in the high pressure well by the throttle orifice, with
Realize the wellhead protecting to high pressure well.
2. the injection device for high pressure well according to claim 1, it is characterised in that
The lower connecting tube includes lower cylinder sleeve and lower baffle ring, and the lower baffle ring is with the central tube near described
One end of upper cylinder sleeve is fixedly connected, and the lower cylinder sleeve is sleeved on the institute between the upper cylinder sleeve and the lower baffle ring
State on central tube, the two ends of the lower cylinder sleeve are brought into close contact with the upper cylinder sleeve and the lower baffle ring respectively.
3. the injection device for high pressure well according to claim 2, it is characterised in that
At least one pressure transmission hole, all of pressure transmission hole at least one pressure transmission hole are provided with central tube
One end connected with the annular fluid cylinder with the inner space and the other end of the central tube,
When in use, the liquid flow to the annular liquid from the inner chamber of the central tube by the pressure transmission hole
In cylinder.
4. the injection device for high pressure well according to claim 3, it is characterised in that
The upper end medial surface of the upper cylinder sleeve has upper cylinder sleeve protuberance, the lower end outside mask of the lower cylinder sleeve
There is the lower cylinder sleeve protuberance for the spacing upper cylinder sleeve, the lower end of the upper cylinder sleeve protrudes with the lower cylinder sleeve
Portion is brought into close contact.
5. the injection device for high pressure well according to claim 4, it is characterised in that
The upper cylinder sleeve protuberance and lower cylinder sleeve protuberance along the central tube radial direction outwardly,
Above the inner surface of the described upper cylinder sleeve below the upper cylinder sleeve protuberance and the lower cylinder sleeve protuberance
The outer surface of the lower cylinder sleeve slides over each other connection.
6. the injection device for high pressure well according to claim 5, it is characterised in that
The annular fluid cylinder is by the inner surface of the upper cylinder sleeve below the upper cylinder sleeve protuberance, the upper end of lower cylinder sleeve
The outer surface of face and the central tube one another around forming,
When in use, the liquid is flow in the annular fluid cylinder by least one pressure transmission hole, described
Upper cylinder sleeve is moved along the longitudinally of the central tube towards the packing element described in liquid-driving in annular fluid cylinder
To extrude the packing element.
7. the injection device for high pressure well according to claim 6, it is characterised in that
All throttle orifices are arranged at the lower section of all pressure transmission holes.
8. the injection device for high pressure well according to claim 7, it is characterised in that
At least one arc groove, all circular arcs at least one arc groove are provided with the lower baffle ring
One end of groove is connected with the corresponding throttle orifice, and the other end of the arc groove is connected with the toroidal cavity,
When in use, the liquid in the inner chamber of the central tube flow to the circular arc by the throttle orifice
Groove, flow to the toroidal cavity by the arc groove afterwards, finally flow to the water under high pressure from toroidal cavity
Well.
9. the injection device for high pressure well according to claim 8, it is characterised in that
The arc groove is one-to-one relationship with the throttle orifice.
10. the injection device for high pressure well according to claim 9, it is characterised in that
The upper connecting tube includes the pipe joint being fixedly secured to one another and upper supervisor, and the upper supervisor is sleeved on institute
State on the outer surface of the central tube above packing element, and the lower surface of the upper supervisor is upper with the packing element
Surface is closely pasted, and the upper inside surface of the upper supervisor is fixedly connected with the lower external face of the pipe joint.
11. injection devices for high pressure well according to claim 10, it is characterised in that
The pipe joint have for the spacing upper supervisor the first pipe joint protuberance and be arranged on described the
The second pipe joint protuberance below one pipe joint protuberance, it is described it is upper supervisor have first on be responsible for protuberance
Protuberance is responsible on second below protuberance with being arranged on described first to be responsible for, first pipe joint is dashed forward
Go out portion, the second pipe joint protuberance, be responsible on protuberance and second on first and to be responsible for protuberance along in described
The radial direction of heart pipe is outwardly.
12. injection devices for high pressure well according to claim 11, it is characterised in that
The lower surface of the first pipe joint protuberance is brought into close contact each other with the upper surface of the upper supervisor, institute
The upper surface for stating supervisor's protuberance on the lower surface and described first of the second pipe joint protuberance is brought into close contact.
13. injection devices for high pressure well according to claim 12, it is characterised in that
The upper end of the central tube is provided with central tube protuberance radially outwardly, it is described in
It is responsible for protuberance on heart pipe protuberance and described second to be fitted to each other, for the spacing upper supervisor.
14. injection devices for high pressure well according to claim 13, it is characterised in that
Sealing connects the inner surface of the upper supervisor between the pipe joint and the outer surface of central tube respectively
Connect, be tightly connected between the inner surface of the upper cylinder sleeve and the outer surface of the central tube, the upper cylinder half
It is tightly connected between the inner surface of set and the outer surface of the lower cylinder sleeve.
15. injection device for high pressure well according to any one of claim 1-14, its feature
It is,
The injection device also include setting ball, the setting ball be arranged in the inner chamber of the central tube
Setting ball seat is fitted to each other,
When in use, the injection device is fitted to each other to realize to institute by setting ball with the setting ball seat
Injection device is stated to sprain pressure.
16. injection devices for high pressure well according to claim 15, it is characterised in that
The setting ball seat is radially protruded inwardly from by the lower end of the central tube and formed.
17. injection devices for high pressure well according to claim 16, it is characterised in that
The setting ball seat is arranged on the lower section of all throttle orifices.
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| 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 |
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| Publication Number | Publication Date |
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| CN106812496A true CN106812496A (en) | 2017-06-09 |
| CN106812496B CN106812496B (en) | 2019-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510853997.XA Active CN106812496B (en) | 2015-11-30 | 2015-11-30 | Injection device for high-pressure water well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116201512A (en) * | 2023-02-14 | 2023-06-02 | 新疆敦华绿碳技术股份有限公司 | Carbonate reservoir oil displacement method |
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| CN2670597Y (en) * | 2003-12-17 | 2005-01-12 | 彭红英 | Injector of water well |
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| 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 |
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| 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 |
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| CN116201512A (en) * | 2023-02-14 | 2023-06-02 | 新疆敦华绿碳技术股份有限公司 | Carbonate reservoir oil displacement method |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106812496B (en) | 2019-04-09 |
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