CN110485968A - Two sections of level-one eccentric acid note integrated pipe columns - Google Patents
Two sections of level-one eccentric acid note integrated pipe columns Download PDFInfo
- Publication number
- CN110485968A CN110485968A CN201910870058.4A CN201910870058A CN110485968A CN 110485968 A CN110485968 A CN 110485968A CN 201910870058 A CN201910870058 A CN 201910870058A CN 110485968 A CN110485968 A CN 110485968A
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- switch valve
- ball
- seat
- sliding sleeve
- lower contact
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- 239000002253 acid Substances 0.000 title claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000002347 injection Methods 0.000 claims abstract description 59
- 239000007924 injection Substances 0.000 claims abstract description 59
- 230000020477 pH reduction Effects 0.000 claims abstract description 39
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 44
- 239000010959 steel Substances 0.000 claims description 44
- 239000007788 liquid Substances 0.000 claims description 38
- 238000007789 sealing Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 21
- 239000012530 fluid Substances 0.000 description 10
- 230000006872 improvement Effects 0.000 description 9
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000003190 augmentative effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- 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
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing or limiting, e.g. eliminating, the deposition of paraffins or like substances
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to a kind of two sections of level-one eccentric acid note integrated pipe columns, including upper eccentric injection mandrel corresponding with upper water filling layer and lower eccentric injection mandrel corresponding with bet water layer, centralizer and packer are installed between upper eccentric injection mandrel and lower eccentric injection mandrel, switch valve is installed above upper eccentric injection mandrel, the lower section of lower eccentric injection mandrel is equipped with intermediate oil pipe, acidification ball-and-seat is screwed with below intermediate oil pipe, the lower end of acidification ball-and-seat is screwed with screen casing, oil tube fixer is installed below screen casing, coating tubing is connected with below oil tube fixer, the lower end of coating tubing is screwed with silk plug.The lower contact inner cavity middle section of acidification ball-and-seat is equipped with the sliding sleeve tee fixed by shear pin, and the top of lower contact is equipped with the pressure ring fixed by shear pin, is equipped with sealed ball seat at the top of pressure ring.Acid note integrated pipe column only needs to remove one-trip string, can be achieved with successively being acidified from the bottom up, and the residual acid of the row of not needing, and acidification terminates directly fill the water after dropping-fishing test.
Description
Technical field
The present invention relates to a kind of injection well pipe column more particularly to a kind of two sections of level-one eccentric acid note integrated pipe columns, belong to
Water injection well engineering device technique field.
Background technique
Water injection well is after exploitation after a period of time, especially latter period of oilfield development, the water injection pressure of most of water injection well
It can improve a lot, and show increased trend year by year, cause water injection rate fewer and fewer, waterflooding development effect is caused sternly
The influence of weight, finally greatly reduces field output.
Acidification is the unblocking and injection increasing measure often taken stratum, using the chemical corrosion of acid solution, and to stratum
Hydraulic action when acid, corrosion formation blockage object and formation mineral are squeezed, expands, extend, link up stratum fracture hole, or on stratum
In cause with the man-made fracture compared with high flow conductivity, to restore and improve stratum permeability, reduce the resistance that oil gas flows into shaft bottom
Power and the injectability for improving water injection well, to achieve the purpose that oil well production increasing, intensified injection of wells.
In water injection well de-plugging at present or augmented injection construction, dispensing, de-plugging are implemented respectively by tubing string twice, and flow chart is general
Are as follows: propose downhole water injection string → processing pit shaft → lower leaf de-plugging or augmented injection tubing string → de-plugging or augmented injection construction → drain → lower point
Tubing string is infused, de-plugging or augmented injection tubing string is layered and generally uses that machinery is set or hydraulic setting packer, mating screen casing or ball-and-seat are sliding
Set switch.
Traditional acidizing unblocking technique is primarily present following problems:, may (1) due to carry out pressure release or drain after acidification
It causes oil reservoir excited, causes particle migration to damage to reservoir, there are certain risks；(2) to be carried out after being acidified de-plugging
The prolonged row's of returning processing, it is long to account for the well time；(3) working procedure is more, and the period is long, more using tool, increases operating cost；(4) take out
The coating damage of the coating tubing below screen casing in order to prevent is drawn in discharge opeing process, acid need to be carried out by upper a set of plain tubing again
Change, drain construction, increases Master Cost；(5) returning the acid solution ejected cannot discharge on the spot, need with special vehicle transport
It is handled to specified place, increases subsequent processing cost.
Under the situation of current low oil price, carry out the research of separate layer acid treatment, seperated layer water injection the integration not row of returning technique, raising
Water flooding effectiveness reduces operating cost, saves Master Cost, and reduction accounts for the well period, and can achieve reduces oil field development cost,
Improve oil field development benefit, and in terms of be of great significance.
Summary of the invention
It is an object of the present invention to overcome problems of the prior art, a kind of two sections of level-one eccentric sour notes one are provided
Body tubing string, it is only necessary to one-trip string is removed, can be achieved with successively being acidified from the bottom up, and the residual acid of the row of not needing, acidification knot
Beam can be filled the water directly after dropping-fishing test.
In order to solve the above technical problems, the eccentric acid note integrated pipe columns of two sections of a kind of level-one of the invention, including with upper note
The corresponding upper eccentric injection mandrel of water layer and lower eccentric injection mandrel corresponding with bet water layer, upper eccentric injection mandrel and lower bias
Centralizer and packer are installed between injection well downhole flow regulator, switch valve, the lower bias are installed above the upper eccentric injection mandrel
The lower section of injection well downhole flow regulator is equipped with intermediate oil pipe, and acidification ball-and-seat is screwed with below the intermediate oil pipe, the acidification ball-and-seat
Lower end is screwed with screen casing, and oil tube fixer is equipped with below the screen casing, is connected with coating below the oil tube fixer
The lower end of oil pipe, the coating tubing is screwed with silk plug.
Compared with the existing technology, the present invention achieves following the utility model has the advantages that centralizer can make tubing string and packer more
Between two parties, packing element expansion is more uniform when making packer setting；Oil tube fixer is supported on the work that internal surface of sleeve pipe plays Auxiliary support
With.Well cleanout and reverse cleanout can be carried out before the acidification non-pitching of ball-and-seat；Inner sleeve steel ball is put into acidification ball-and-seat, cementing truck is just suppressed can
Make packer setting, the annular space of upper water filling layer and water layer of betting is separated；Then proceed to boosting shear pin is cut, inner sleeve steel ball and
Inner sleeve ball seat is fallen into together in the coating tubing below screen casing, and acid solution enters annular space from screen casing, so along tubing string inner cavity downlink at this time
Enter bet water layer afterwards, implements the acidification of bet water layer.After the acid solution of water layer of betting and displacement fluid have been infused, throwing solvable ball will be switched
The central duct of valve is closed, and switch valve is opened to the acid solution channel of annular space, and acid solution enters upper water filling layer, fills the water layer in implementation
Acidification.After upper water filling layer and bet water layer are acidified, solvable ball dissolution, the central duct of switch valve is led to again, single to acidification
Sealed steel ball is put into stream valve, achieves the function of conventional ball-and-seat, it is real by upper eccentric injection mandrel and lower eccentric injection mandrel
Existing seperated layer water injection.One-trip string is only so removed, that is, realizes the layer-by-layer acidification and seperated layer water injection on two stratum.It is anti-due to not needing
Lower tubular column is played again, not will cause acid solution overflow, and the present invention returns row without carrying out residual sour ground.There may be the residual of acid solution below screen casing
It stays, therefore resistance to corrosion is improved using coating tubing.
As an improvement of the present invention, the acidification ball-and-seat includes ball-and-seat top connection and ball-and-seat lower contact, the list
The lower end internal screw thread of stream valve top connection is screwed in the top of ball-and-seat lower contact, and the lower port of ball-and-seat top connection is resisted against list
It flows in valve lower contact outer step, the inner cavity middle section of the ball-and-seat lower contact is equipped with inner sleeve ball seat, the between outer land of the inner sleeve ball seat
Rank is resisted against the lower section of step in ball-and-seat lower contact, is uniformly provided with inner sleeve ball on the circumference below the inner sleeve ball seat outer step
Seat shear pin hole；At least two inner sleeve shear pins are uniformly screwed on the circumference in ball-and-seat lower contact middle section, each inner sleeve shear pin
Inner termination is respectively embedded into corresponding inner sleeve ball seat shear pin hole；The centre bore upper end of the inner sleeve ball seat, which is equipped with, accepts inner sleeve steel ball
Horn mouth；The top of the ball-and-seat lower contact is equipped with internal diameter amplification section and is plugged with the pressure ring upwardly extended, the pressure ring
Lower circumference on be symmetrically arranged with pressure ring shear pin hole, at least two are uniformly screwed on the top circumference of the ball-and-seat lower contact
Pressure ring shear pin, the inner termination of each pressure ring shear pin are respectively embedded into corresponding pressure ring shear pin hole, and the upper periphery of the pressure ring is screwed on
There is ball joint；The top of the pressure ring is equipped with the sealed ball seat for accepting sealed steel ball, the top outer rim quilt of the sealed ball seat
It is pressed in below the interior step of the ball joint, the center-hole diameter of the sealed ball seat and pressure ring is all larger than the inner sleeve steel ball
Diameter.Well cleanout and reverse cleanout can be carried out before the acidification non-pitching of ball-and-seat.Inner sleeve steel ball is put into from well head, inner sleeve steel ball drop is simultaneously set
At the horn mouth of inner sleeve ball seat upper end, cementing truck, which is just suppressed, makes packer setting in casing, by the ring of upper and lower two water fillings layer
Sky partition；Continue to suppress, inner sleeve shear pin is cut, and inner sleeve steel ball and inner sleeve ball seat downlink together fall into the tail pipe below screen casing
In, the fluid course of acidification ball-and-seat is opened, acidizing treatment can be carried out to bet water layer at this time.Then into switch valve, investment can
Molten ball, solvable ball builds the pressure after setting makes switch valve sliding sleeve slides downwards, and barrel liquid discharge mouth is opened, and is acidified to upper water filling layer.Acid
Change the fluid course of ball-and-seat as pressure transmission channel, guarantees that the switch valve sliding sleeve of top can be with smooth opening.Two water filling layers are sour
After the completion of change, sealed steel ball is put into, the upper port that sealed steel ball falls in sealed ball seat sets the function, it can be achieved that conventional ball-and-seat
Can, injection water enters upper water filling layer from upper eccentric injection mandrel, enters bet water layer from lower eccentric injection mandrel, realizes quantitative injection.
As a further improvement of the present invention, the ball seat that the upper end periphery of the ball joint is symmetrically arranged with upper end opening connects
The top of the outer slot of head, the ball joint is equipped with block key seat, and the top of the block key seat is screwed in the ball-and-seat top connection
Upper inside wall, be symmetrically arranged with multiple block key caulking grooves on the lower circumference wall of the centre bore of the block key seat, each block key caulking groove
Block key pin shaft is plugged between two opposite side walls respectively, rotatable block key is respectively installed on each block key pin shaft, each block key
Lower end is corresponding to be inserted into the outer slot of corresponding ball joint, and torsional spring, each torsional spring are respectively installed in the middle part of each block key pin shaft
One end be inserted into corresponding block key, the other end of each torsional spring, which is limited in below the roof of block key caulking groove, makes block key by inside
The tension of fold.After sealed steel ball is set, as the conventional ball-and-seat of water injection string, water is injected from eccentric injection mandrel and enters ground
Layer opens water filling gate and builds the pressure, pressure ring shear pin cut, ball joint, sealed steel ball, sealed ball seat are removed together with pressure ring one
Row, until the bottom of pressure ring is resisted against on the interior step of lower contact；The outer slot of ball joint discharges block key because gliding, and block key exists
Bullet is flat under the action of torsional spring tension, i.e., the free end of each block key is perpendicularly oriented to the axis of block key seat, so limits sealed steel ball
Between block key and sealed ball seat, in this way in anti-flushing well, sealed steel ball will not be washed out ball joint.
As a further improvement of the present invention, the switch valve includes switch valve cylinder, the lower end of the switch valve cylinder
It is screwed with switch valve lower contact, the upper port of the switch valve cylinder is equipped with taper box thread, the lower section of the taper box thread
Equipped with step in cylinder first, the inner cavity middle section of the switch valve cylinder is equipped with switch valve sliding sleeve, the switch valve sliding sleeve it is outer
The inner wall of wall and the switch valve cylinder fits, and the upper surface of the switch valve sliding sleeve is resisted against step in the cylinder first
Lower section；The centre bore upper end of the switch valve sliding sleeve is equipped with the switch valve sliding sleeve horn mouth set for solvable ball；The cylinder
The lower section of step is equipped with the barrel liquid discharge mouth of perforation in first, and the inner port of the barrel liquid discharge mouth is switched on and off valve sliding sleeve and is hidden
Lid；The lower end of the switch valve sliding sleeve is equipped with the sliding sleeve resetting-mechanism for pushing its uplink.It is being switched when putting into solvable ball and setting
After the upper port of valve sliding sleeve, cementing truck is just suppressed, solvable ball pull switch valve sliding sleeve slides downwards, until barrel liquid discharge mouth exposes, this
When acid solution injected into tubing string by cementing truck, acid solution is flowed out from barrel liquid discharge mouth, enters upper water filling layer from the annular space of tubing string, right
Upper water filling layer is acidified.Acid solution guarantees that tubing string inner cavity is full of displacement fluid into continuing after complete to infuse displacement fluid；Then cementing truck is closed,
High pressure above solvable ball disappears, and sliding sleeve resetting-mechanism pull switch valve sliding sleeve uplink covers barrel liquid discharge mouth, closes acidification
Liquid outlet channel.Then closing well, upper water filling layer and bet water layer carry out acidification reaction, solvable ball dissolution.The central passage of switch valve
Again unimpeded, sealed steel ball can pass through the central passage of switch valve, and the sealed ball seat for falling into acidification ball-and-seat is set.
As a further improvement of the present invention, the sliding sleeve resetting-mechanism includes sliding sleeve spring and bushing, the bushing
Upper end is screwed in the internal screw thread of switch valve sliding sleeve lower end, and the lower end of the bushing is inserted in the switch valve lower contact
Inner cavity, the sliding sleeve spring are looped around the periphery of the bushing, and the lower end of the sliding sleeve spring is supported under the switch valve and connects
The upper surface of head, the upper end inner edge of the sliding sleeve spring withstands on the lower end surface of the switch valve sliding sleeve.It is driven when solvable ball is pressurized
When switch valve sliding sleeve moves down, the lower end of bushing is slided in the centre bore of switch valve lower contact, is played guiding and is stablized sliding sleeve bullet
The effect of spring.When pressure above solvable ball disappears, sliding sleeve tension force of spring pull switch valve sliding sleeve uplink, by barrel liquid discharge
The inner port closing of mouth, closes the acidification liquid outlet channel on upper layer.
As a further improvement of the present invention, in the lower end outer wall of the bushing and the centre bore of the switch valve lower contact
Wall fits, and the middle section of the switch valve lower contact centre bore is equipped with step in switch valve lower contact, the lower end surface of the bushing
Upper surface and the barrel liquid discharge mouth with the distance between step in the switch valve lower contact equal to the switch valve sliding sleeve
The distance between lower edge.The lower end of bushing and the centre bore of switch valve lower contact form good cooperation, so that bushing is led
To more accurate, when the lower end surface downlink of bushing and when being resisted against in switch valve lower contact on step, the upper surface of switch valve sliding sleeve
The lower section for having come downwards to barrel liquid discharge mouth, barrel liquid discharge mouth is completely exposed, and on the one hand ensures the smoothness in acid solution channel, another party
Face realizes the positioning of switch valve sliding sleeve down stroke.
As a further improvement of the present invention, the inner wall of the switch valve cylinder is concordant with the lower end surface of switch valve sliding sleeve
Position is equipped with step in cylinder second, and the upper end outer rim of the sliding sleeve spring is resisted against the lower section of step in the cylinder second.
Eccentric injection mandrel requires to be not less than 46mm for the current channel of pulling and running tool, and step can be to the upper of sliding sleeve spring in cylinder second
Stroke carries out auxiliary positioning, and the cavity in cylinder second below step provides accommodation space for sliding sleeve spring, expands as far as possible
The diameter of bore of bushing provides bigger down going channel for sealed steel ball, pulling and running tool and other downhole probes.
As a further improvement of the present invention, the upper periphery of the switch valve sliding sleeve is at least twice switch valve
Sealing ring, the middle part periphery of the switch valve sliding sleeve sealing ring, barrel liquid discharge mouth at least twice switch valve exist
Short transverse is located in the switch valve upper seal and switch valve between sealing ring.Switch valve upper seal is by barrel liquid discharge mouth
Upward leakage-gap seals up, and sealing ring seals up the downward leakage-gap of barrel liquid discharge mouth in switch valve, so that switch
Before valve sliding sleeve downlink, acid solution will not be leaked out from barrel liquid discharge mouth.
As a further improvement of the present invention, switch valve lower contact is equipped with below the external thread section of the switch valve lower contact
Outer step, the lower end surface of the switch valve cylinder are resisted against in the switch valve lower contact outer step, the switch valve lower contact
The top of external thread section is equipped with switch valve lower contact seal section, and the periphery of the switch valve lower contact seal section is embedded at least two
The inner wall of road switch valve lower seal and the switch valve cylinder, which is realized, to be sealed.Switch valve lower contact outer step under switch valve to connecing
Axially position is played the role of in the precession of head, and switch valve lower contact seal section can install at least twice switch valve lower seal, make
Obtain the good seal between switch valve lower contact and switch valve cylinder.
As a further improvement of the present invention, the bell-mouthed upper port internal diameter of the switch valve sliding sleeve and the cylinder first
The internal diameter of interior step is equal, and the internal diameter of the bushing is equal with the internal diameter of the switch valve sliding sleeve and is greater than the sealed steel ball
Diameter.Step smooth connection in the bell-mouthed upper port of switch valve sliding sleeve and cylinder first, the inner wall of bushing and switch valve sliding sleeve
Smooth connection is conducive to the smooth downlink of sealed steel ball or downhole probe.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, attached drawing only provide with reference to
Illustrate to use, it is non-to limit the present invention.
Fig. 1 is the structural schematic diagram of two sections of level-one of the present invention eccentric acid note integrated pipe columns.
Fig. 2 is the cross-sectional view that ball-and-seat is acidified in Fig. 1.
Fig. 3 is the main view of switch valve in Fig. 1.
In figure: A. switch valve；B. upper eccentric injection mandrel；C. centralizer；D. packer；E. eccentric injection mandrel is descended；F. intermediate
Oil pipe；G. it is acidified ball-and-seat；H. screen casing；J. oil tube fixer；K. coating tubing；L. silk plug.1. ball-and-seat top connection；2. block key
Seat；2a. block key caulking groove；3. block key pin shaft；4. torsional spring；5. block key；6. ball joint；The outer slot of 6a. ball joint；6b. ball seat
Connector O-ring；7. sealed steel ball；8. sealed ball seat；9. pressure ring；9a. pressure ring shear pin；10. ball-and-seat lower contact；10a. ball-and-seat
Lower contact O-ring；11. inner sleeve ball seat；11a. inner sleeve O-ring；11b. inner sleeve shear pin；12. inner sleeve steel ball.13. switch valve cylinder；
13a. taper box thread；Step in 13b. cylinder first；13c. barrel liquid discharge mouth；Step in 13d. cylinder second；14. solvable
Ball；15. switch valve sliding sleeve；15a. switch valve upper seal；Sealing ring in 15b. switch valve；16. sliding sleeve spring；17. bushing；
18. switch valve lower contact；18a. switch valve lower seal；Step in 18b. switch valve lower contact；Outside 18c. switch valve lower contact
Step.
Specific embodiment
As shown in Figure 1, two sections of level-one eccentric acid note integrated pipe columns of the invention include on corresponding with upper water filling layer
Eccentric injection mandrel B and lower eccentric injection mandrel E corresponding with bet water layer, between upper eccentric injection mandrel B and lower eccentric injection mandrel E
It is equipped with above centralizer C and packer D, upper eccentric injection mandrel B and switch valve A is installed, set below lower eccentric injection mandrel E
There is intermediate oil pipe F, acidification ball-and-seat G is screwed with below intermediate oil pipe F, the lower end of acidification ball-and-seat G is screwed with screen casing H, sieves
Oil tube fixer J is installed below pipe H, coating tubing K, the lower end rotation of coating tubing K are connected with below oil tube fixer J
It is connected to silk plug L.
As shown in Fig. 2, acidification ball-and-seat G includes ball-and-seat top connection 1 and ball-and-seat lower contact 10, ball-and-seat top connection 1
Lower end internal screw thread be screwed in the top of ball-and-seat lower contact 10, and the lower port of ball-and-seat top connection 1 is resisted against under ball-and-seat
In connector outer step, the root of ball-and-seat lower contact outer step is embedded with ball-and-seat lower contact O-ring 10a and ball-and-seat top connection 1
Inner wall realize sealing.The inner cavity middle section of ball-and-seat lower contact 10 is equipped with inner sleeve ball seat 11, the outer step of inner sleeve ball seat 11 against
The lower section of step in ball-and-seat lower contact is uniformly provided with inner sleeve ball seat shear pin hole on the circumference below inner sleeve ball seat outer step；
At least two inner sleeve shear pin 11b, the inner termination of each inner sleeve shear pin 11b are uniformly screwed on the circumference in 10 middle section of ball-and-seat lower contact
It is respectively embedded into corresponding inner sleeve ball seat shear pin hole；The centre bore upper end of inner sleeve ball seat 11 is equipped with the loudspeaker for accepting inner sleeve steel ball 12
Mouthful.The external wall of upper portion of inner sleeve ball seat 11 is realized embedded with inner sleeve O-ring 11a and ball-and-seat lower contact inner wall and is sealed.
Packer D on tubing string is located between two water filling layers, and acidification ball-and-seat G is mounted on above screen casing H, can before non-pitching
Carry out well cleanout and reverse cleanout.31mm inner sleeve steel ball 12 is put into from well head, inner sleeve steel ball 12 falls and sets in 11 upper end of inner sleeve ball seat
At horn mouth, cementing truck, which is just being suppressed, sets packer D in casing, and the annular space of upper and lower two water fillings layer is separated；Continue to suppress,
Inner sleeve shear pin 11b is cut, and inner sleeve steel ball 12 and inner sleeve ball seat 11 downlink together fall into the tail pipe below screen casing H, opens acid
Change the fluid course of ball-and-seat G, acidizing treatment can be carried out to bet water layer at this time.
Then the solvable ball 14 of 48mm is put into switch valve A, solvable ball 14 builds the pressure after setting to be made under switch valve sliding sleeve 15
It is sliding, barrel liquid discharge mouth 13c is opened, upper water filling layer is acidified.The fluid course of ball-and-seat G is acidified as pressure transmission channel,
Guarantee that the switch valve sliding sleeve 15 of top can be with smooth opening.
The top of ball-and-seat lower contact 10 is equipped with internal diameter amplification section and is plugged with the pressure ring 9 upwardly extended, the lower part of pressure ring 9
It is symmetrically arranged with pressure ring shear pin hole on circumference, at least two pressure ring shear pins are uniformly screwed on the top circumference of ball-and-seat lower contact 10
The inner termination of 9a, each pressure ring shear pin 9a are respectively embedded into corresponding pressure ring shear pin hole, and the upper periphery of pressure ring 9 is screwed with ball seat and connects
First 6, the lower, outer perimeter wall of ball joint 6 is realized by ball joint O-ring 6b and the inner wall of ball-and-seat top connection 1 to be sealed.Pressure
The top of ring 9 is equipped with the sealed ball seat 8 for accepting sealed steel ball 7, and the top outer rim of sealed ball seat 8 is crushed on the interior of ball joint 6
Below step, the center-hole diameter of sealed ball seat 8 and pressure ring 9 is all larger than the diameter of inner sleeve steel ball 12.Two water filling layers have been acidified
Cheng Hou, put into 40mm sealed steel ball 7, and the upper port that sealed steel ball 7 falls in sealed ball seat 8 is set, it can be achieved that conventional ball-and-seat
Function.
The upper end periphery of ball joint 6 is symmetrically arranged with the outer slot 6a of ball joint of upper end opening, the top of ball joint 6
Equipped with block key seat 2, the top of block key seat 2 is screwed in the upper inside wall of ball-and-seat top connection 1, the lower part of the centre bore of block key seat 2
It is symmetrically arranged with multiple block key caulking groove 2a in circumferential wall, is plugged with block key pin shaft respectively between the two opposite side walls of each block key caulking groove 2a
3, it is respectively installed with rotatable block key 5 on each block key pin shaft 3, the lower end of each block key 5 is corresponding to be inserted into corresponding ball seat and connect
In the outer slot 6a of head, the middle part of each block key pin shaft 3 is respectively installed with torsional spring 4, and one end of each torsional spring 4 is inserted into corresponding block key 5,
The other end of each torsional spring 4, which is limited in below the roof of block key caulking groove 2a, makes block key 5 by the tension of fold inward.
After sealed steel ball 7 is set, as the conventional ball-and-seat of water injection string, water is injected from eccentric injection mandrel and enters stratum,
It opens water filling gate to build the pressure, pressure ring shear pin 9a be cut, ball joint 6, sealed steel ball 7, sealed ball seat 8 are together with pressure ring 9
Downlink, until the bottom of pressure ring 9 is resisted against on the interior step of ball-and-seat lower contact 10；The outer slot 6a of ball joint will gear because gliding
Key 5 discharges, and bullet under the action of 4 tension of torsional spring of block key 5 is flat, i.e., the free end of each block key 5 is perpendicularly oriented to the axis of block key seat 2,
So sealed steel ball 7 is limited between block key 5 and sealed ball seat 8, in this way in anti-flushing well, sealed steel ball 7 will not be washed out
Ball joint 6.
As shown in figure 3, switch valve A includes switch valve cylinder 13, the lower end of switch valve cylinder 13 is screwed under switch valve and connects
First 18, the upper port of switch valve cylinder 13 is equipped with taper box thread 13a, and the lower section of taper box thread 13a is equipped in cylinder first
Step 13b, the inner cavity middle section of switch valve cylinder 13 are equipped with switch valve sliding sleeve 15, the outer wall and switch valve cylinder of switch valve sliding sleeve 15
13 inner wall fits, and the upper surface of switch valve sliding sleeve 15 is resisted against the lower section of step 13b in cylinder first；Switch valve sliding sleeve 15
Centre bore upper end be equipped with the switch valve sliding sleeve horn mouth set for solvable ball 14；The lower section of step 13b is equipped in cylinder first
The barrel liquid discharge mouth 13c of perforation, the inner port of barrel liquid discharge mouth 13c are switched on and off valve sliding sleeve 15 and are covered；Switch valve sliding sleeve 15
Lower end is equipped with the sliding sleeve resetting-mechanism for pushing its uplink.
When putting into solvable ball 14 and setting after the upper port of switch valve sliding sleeve 15, cementing truck is just suppressed, and solvable ball 14 pushes away
Dynamic switch valve sliding sleeve 15 glides, until barrel liquid discharge mouth 13c exposes, acid solution, acid solution are injected into tubing string by cementing truck at this time
It is flowed out from barrel liquid discharge mouth 13c, enters upper water filling layer from the annular space of tubing string, upper water filling layer is acidified.Acid solution is into complete subsequent
Continuous note displacement fluid, guarantees that tubing string inner cavity is full of displacement fluid；Then cementing truck is closed, the high pressure of solvable 14 top of ball disappears, and sliding sleeve is multiple
15 uplink of position mechanism urges switch valve sliding sleeve, barrel liquid discharge mouth 13c is covered, and closes acidification liquid outlet channel.Then closing well, upper note
Water layer and bet water layer carry out acidification reaction, and solvable ball 14 dissolves.The central passage of switch valve A is again unimpeded, and sealed steel ball can
To pass through the central passage of switch valve A, the sealed ball seat for falling into acidification ball-and-seat G is set.
Sliding sleeve resetting-mechanism includes sliding sleeve spring 16 and bushing 17, and the upper end of bushing 17 is screwed in 15 lower end of switch valve sliding sleeve
Internal screw thread in, the lower end of bushing 17 is inserted in the inner cavity of switch valve lower contact 18, and sliding sleeve spring 16 is looped around the outer of bushing 17
Week, the lower end of sliding sleeve spring 16 are supported in the upper surface of switch valve lower contact 18, and the upper end inner edge of sliding sleeve spring 16 withstands on switch
The lower end surface of valve sliding sleeve 15.When solvable ball 14 is pressurized, and switch valve sliding sleeve 15 is driven to move down, the lower end of bushing 17 is under switch valve
It is slided in the centre bore of connector 18, play the role of guiding and stablizes sliding sleeve spring 16.When the pressure of solvable 14 top of ball disappears
When, 15 uplink of tension pull switch valve sliding sleeve of sliding sleeve spring 16 closes the inner port of barrel liquid discharge mouth 13c, closes upper layer
Acidification liquid outlet channel.
The lower end outer wall of bushing 17 and the center bore inner wall of switch valve lower contact 18 fit, switch valve lower contact centre bore
Middle section be equipped with step 18b in switch valve lower contact, in the lower end surface of bushing 17 and switch valve lower contact between step 18b away from
The distance between lower edge from the upper surface and barrel liquid discharge mouth 13c for being equal to switch valve sliding sleeve 15.The lower end of bushing 17 and switch
The centre bore of valve lower contact 18 forms good cooperation, so that the guiding of bushing 17 is more accurate, when the lower end surface downlink of bushing 17
And when being resisted against in switch valve lower contact on step 18b, the upper surface of switch valve sliding sleeve 15 has come downwards to barrel liquid discharge mouth 13c's
Barrel liquid discharge mouth 13c is completely exposed, on the one hand ensures the smoothness in acid solution channel by lower section, and it is sliding on the other hand to realize switch valve
Cover the positioning of 15 down strokes.
The inner wall of switch valve cylinder 13 position concordant with the lower end surface of switch valve sliding sleeve 15 is equipped with step in cylinder second
13d, the upper end outer rim of sliding sleeve spring 16 are resisted against the lower section of step 13d in cylinder second.Step 13d can be right in cylinder second
The up stroke of sliding sleeve spring 16 carries out auxiliary positioning, and the cavity in cylinder second below step 13d is that sliding sleeve spring 16 provides
Accommodation space expands the diameter of bore of bushing 17 as far as possible, provides bigger down going channel for sealed steel ball and downhole probe.
The upper periphery of switch valve sliding sleeve 15 is embedded at least twice switch valve upper seal 15a, switch valve sliding sleeve 15
Middle part periphery sealing ring 15b at least twice switch valve, barrel liquid discharge mouth 13c is located at close on switch valve in short transverse
In seal 15a and switch valve between sealing ring 15b.Switch valve upper seal 15a that barrel liquid discharge mouth 13c is upward leakage-gap
It seals up, sealing ring 15b seals up the downward leakage-gap of barrel liquid discharge mouth 13c in switch valve, so that switch valve sliding sleeve 15
Before downlink, acid solution will not be leaked out from barrel liquid discharge mouth 13c.
Switch valve lower contact outer step 18c is equipped with below the external thread section of switch valve lower contact 18, switch valve cylinder 13
Lower end surface is resisted against on switch valve lower contact outer step 18c, and the top of switch valve lower contact external thread section is equipped under switch valve and connects
Head seal section, the periphery of switch valve lower contact seal section is embedded at least twice switch valve lower seal 18a and switch valve cylinder
13 inner wall realizes sealing.Switch valve lower contact outer step 18c plays the role of axially position to the precession of switch valve lower contact 18,
Switch valve lower contact seal section can install at least twice switch valve lower seal 18a, so that switch valve lower contact 18 and switch
Good seal between valve cylinder body 13.
The bell-mouthed upper port internal diameter of switch valve sliding sleeve is equal with the internal diameter of step 13b in cylinder first, bushing 17 it is interior
Diameter is equal with the internal diameter of switch valve sliding sleeve 15 and is greater than the diameter of sealed steel ball.The bell-mouthed upper port of switch valve sliding sleeve and cylinder
Step 13b smooth connection in first, bushing 17 are docked with the inner wall smooth of switch valve sliding sleeve 15, are conducive to sealed steel ball or are gone into the well
The smooth downlink of instrument.
Well cleanout and reverse cleanout can be carried out before the acidification non-pitching of ball-and-seat G；Inner sleeve steel ball, cementing truck are put into acidification ball-and-seat G
Just suppressing can make packer D set and (Y341-114 packer can be used), and the annular space of upper water filling layer and water layer of betting is separated；So
Subsequent pressure of continuing rising cuts shear pin, and inner sleeve steel ball and inner sleeve ball seat are fallen into together in the coating tubing K below screen casing H, sour at this time
Liquid enters annular space along tubing string inner cavity downlink, from screen casing H, subsequently into bet water layer, implements the acidification of bet water layer.Bet water layer
Acid solution and after displacement fluid infused, throw solvable ball 14 and close the central duct of switch valve A, by switch valve A to the acid solution of annular space
Channel is opened, and acid solution enters upper water filling layer, and the acidification of layer is filled the water in implementation.After upper water filling layer and bet water layer are acidified,
Solvable ball 14 dissolves, and the central duct of switch valve A is led to again, puts into sealed steel ball into acidification ball-and-seat G, achieves conventional list
The function of flowing valve realizes seperated layer water injection by upper eccentric injection mandrel B and lower eccentric injection mandrel E.One-trip string is only so removed, i.e.,
Realize the layer-by-layer acidification and seperated layer water injection on two stratum.
The foregoing is merely the preferable possible embodiments of the present invention, non-therefore limitation patent protection model of the invention
It encloses.In addition to the implementation, the present invention can also have other embodiments.All skills formed using equivalent substitution or equivalent transformation
Art scheme, is all fallen within the protection domain of application claims.Technical characteristic of the present invention without description can be by or using now
There is technology realization, details are not described herein.
Claims (10)
1. a kind of two sections of level-one eccentric acid note integrated pipe columns, including upper eccentric injection mandrel corresponding with upper water filling layer and under
The corresponding lower eccentric injection mandrel of layer is filled the water, centralizer and packing are installed between upper eccentric injection mandrel and lower eccentric injection mandrel
Device, it is characterised in that: switch valve is equipped with above the upper eccentric injection mandrel, during the lower section of the lower eccentric injection mandrel is equipped with
Between oil pipe, acidification ball-and-seat is screwed with below the intermediate oil pipe, the lower end of the acidification ball-and-seat is screwed with screen casing, described
Oil tube fixer is installed below screen casing, coating tubing is connected with below the oil tube fixer, the coating tubing
Lower end is screwed with silk plug.
2. two sections of level-one eccentric acid note integrated pipe columns according to claim 1, it is characterised in that: the acidification ball-and-seat
Including ball-and-seat top connection and ball-and-seat lower contact, the lower end internal screw thread of the ball-and-seat top connection is screwed in ball-and-seat lower contact
Top, and the lower port of ball-and-seat top connection is resisted against in ball-and-seat lower contact outer step, the ball-and-seat lower contact it is interior
Chamber middle section is equipped with inner sleeve ball seat, and the outer step of the inner sleeve ball seat is resisted against the lower section of step in ball-and-seat lower contact, described interior
Inner sleeve ball seat shear pin hole is uniformly provided on circumference below set ball seat outer step；On the circumference in ball-and-seat lower contact middle section
Even to be screwed at least two inner sleeve shear pins, the inner termination of each inner sleeve shear pin is respectively embedded into corresponding inner sleeve ball seat shear pin hole；Institute
The centre bore upper end for stating inner sleeve ball seat is equipped with the horn mouth for accepting inner sleeve steel ball；The top of the ball-and-seat lower contact is equipped with internal diameter
Amplify section and be plugged with the pressure ring upwardly extended, pressure ring shear pin hole, single stream are symmetrically arranged in the lower circumference of the pressure ring
At least two pressure ring shear pins are uniformly screwed on the top circumference of valve lower contact, the inner termination of each pressure ring shear pin is respectively embedded into correspondence
Pressure ring shear pin hole in, the upper periphery of the pressure ring is screwed with ball joint；The top of the pressure ring, which is equipped with, accepts sealing steel
The sealed ball seat of ball, the top outer rim of the sealed ball seat are crushed below the interior step of the ball joint, the ball sealer
The center-hole diameter of seat and pressure ring is all larger than the diameter of the inner sleeve steel ball.
3. two sections of level-one eccentric acid note integrated pipe columns according to claim 1, it is characterised in that: the ball joint
Upper end periphery is symmetrically arranged with the outer slot of ball joint of upper end opening, and the top of the ball joint is equipped with block key seat, the gear
The top of keyseat is screwed in the upper inside wall of the ball-and-seat top connection, right on the lower circumference wall of the centre bore of the block key seat
Claim to be equipped with multiple block key caulking grooves, be plugged with block key pin shaft between two opposite side walls of each block key caulking groove respectively, on each block key pin shaft
It is respectively installed with rotatable block key, the lower end of each block key is corresponding to be inserted into the outer slot of corresponding ball joint, each block key
Torsional spring is respectively installed in the middle part of pin shaft, one end of each torsional spring is inserted into corresponding block key, and the other end of each torsional spring is limited in
Make tension of the block key by fold inward below the roof of block key caulking groove.
4. two sections of level-one according to claim 2 eccentric acid note integrated pipe columns, it is characterised in that: the switch valve includes
Switch valve cylinder, the lower end of the switch valve cylinder are screwed with switch valve lower contact, and the upper port of the switch valve cylinder is equipped with
The lower section of taper box thread, the taper box thread is equipped with step in cylinder first, and the inner cavity middle section of the switch valve cylinder is set
There is switch valve sliding sleeve, the outer wall of the switch valve sliding sleeve and the inner wall of the switch valve cylinder fit, the switch valve sliding sleeve
Upper surface be resisted against the lower section of step in the cylinder first；The centre bore upper end of the switch valve sliding sleeve, which is equipped with, supplies solvable ball
The switch valve sliding sleeve horn mouth set；The lower section of step is equipped with the barrel liquid discharge mouth of perforation, the cylinder in the cylinder first
The inner port of liquid outlet is switched on and off valve sliding sleeve and is covered；The lower end of the switch valve sliding sleeve, which is equipped with, pushes the sliding sleeve of its uplink to reset
Mechanism.
5. two sections of level-one eccentric acid note integrated pipe columns according to claim 4, it is characterised in that: the sliding sleeve resets machine
Structure includes sliding sleeve spring and bushing, and the upper end of the bushing is screwed in the internal screw thread of switch valve sliding sleeve lower end, the lining
The lower end of set is inserted in the inner cavity of the switch valve lower contact, and the sliding sleeve spring is looped around the periphery of the bushing, the cunning
The lower end of sleeve spring is supported in the upper surface of the switch valve lower contact, and the upper end inner edge of the sliding sleeve spring withstands on the switch
The lower end surface of valve sliding sleeve.
6. two sections of level-one eccentric acid note integrated pipe columns according to claim 5, it is characterised in that: the lower end of the bushing
Outer wall and the center bore inner wall of the switch valve lower contact fit, and the middle section of the switch valve lower contact centre bore is equipped with switch
The distance between step is equal to the switch in step in valve lower contact, the lower end surface of the bushing and the switch valve lower contact
The distance between the lower edge of the upper surface of valve sliding sleeve and the barrel liquid discharge mouth.
7. two sections of level-one eccentric acid note integrated pipe columns according to claim 5, it is characterised in that: the switch valve cylinder
The inner wall position concordant with the lower end surface of switch valve sliding sleeve be equipped with step in cylinder second, the upper end outer rim of the sliding sleeve spring
It is resisted against the lower section of step in the cylinder second.
8. two sections of level-one eccentric acid note integrated pipe columns according to claim 5, it is characterised in that: the switch valve sliding sleeve
Upper periphery embedded at least twice switch valve upper seal, the middle part periphery of the switch valve sliding sleeve is embedded at least twice
Sealing ring in switch valve, the barrel liquid discharge mouth are located at sealing ring in the switch valve upper seal and switch valve in short transverse
Between.
9. two sections of level-one eccentric acid note integrated pipe columns according to claim 4, it is characterised in that: connect under the switch valve
Switch valve lower contact outer step is equipped with below the external thread section of head, the lower end surface of the switch valve cylinder is resisted against the switch valve
In lower contact outer step, the top of the switch valve lower contact external thread section is equipped with switch valve lower contact seal section, the switch
Realized embedded with the inner wall of at least twice switch valve lower seal and the switch valve cylinder close in the periphery of valve lower contact seal section
Envelope.
10. two sections of level-one eccentric acid note integrated pipe columns according to claim 5, it is characterised in that: the switch valve is sliding
It is equal with the internal diameter of step in the cylinder first to cover bell-mouthed upper port internal diameter, the internal diameter of the bushing and the switch valve
The internal diameter of sliding sleeve is equal and is greater than the diameter of the sealed steel ball.
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| CN201910870058.4A CN110485968B (en) | 2019-09-16 | 2019-09-16 | One-stage two-section eccentric acid injection integrated tubular column |
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| CN110485968B CN110485968B (en) | 2021-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216911A (en) * | 2021-05-31 | 2021-08-06 | 中国海洋石油集团有限公司 | Floating sieve tube |
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| CN110485968B (en) | 2021-06-08 |
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