CN105696995B - The tool of envelope pressure is sprayed for pressure stage differential style and includes its tubing string - Google Patents
The tool of envelope pressure is sprayed for pressure stage differential style and includes its tubing string Download PDFInfo
- Publication number
- CN105696995B CN105696995B CN201610038894.2A CN201610038894A CN105696995B CN 105696995 B CN105696995 B CN 105696995B CN 201610038894 A CN201610038894 A CN 201610038894A CN 105696995 B CN105696995 B CN 105696995B
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- cylinder
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- wall
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- 239000007921 spray Substances 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 42
- 238000012856 packing Methods 0.000 claims description 27
- 239000007788 liquid Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 21
- 238000000034 method Methods 0.000 description 10
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003860 storage Methods 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- 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
- E21B43/11—Perforators; Permeators
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention proposes a kind of tool for pressure stage differential style spray envelope pressure and the tubing string comprising it.The tool includes top connection, connector sleeve, center-pole, packer, lower contact and the inner cylinder of tubular.Wherein, nozzle, pressure break hole are set in top connection, and inner cylinder is arranged on the inner wall of top connection to block nozzle and pressure break hole.Under first pressure effect, inner cylinder moves down and exposes nozzle, and packer setting.Later, nozzle perforation can be passed through.Under second pressure, inner cylinder continues to move down, and to expose pressure break hole, then can carry out fracturing operation.Operating cost can be reduced by the tool.
Description
Technical field
The present invention relates to the technical fields such as hydrocarbon well completions and reservoir reconstruction, and in particular to one kind is sprayed for pressure stage differential style
Seal the tool of pressure and the tubing string comprising it.
Background technology
With the propulsion of untraditional reservoir exploration and development, completion staged fracturing technology is exploited as unconventional petroleum resources
Main Yield-increasing measure also develop rapidly.Completion staged fracturing technology can targetedly be transformed reservoir, expand oil gas
The drainage area of payzone improves the rate of oil and gas recovery.
In the prior art, the method for pressure break carries out after multistage subsection reservoir reconstruction generally use elder generation perforation.It is, storing up
In layer transformation process, first tripping in perforating gun carries out multistage subsection perforation, to form hole in reservoir.Then, perforating gun is carried
Go out stratum.Then, then tripping in has the tubing string of packer, and makes packer setting by way of pitching.Again, pass through pitching
Mode open the first order sliding sleeve of packer, to expose the first order pressure break hole with hole cooperation.Finally, it is injected into tubing string
Fracturing fluid, fracturing fluid is entered by pressure break hole in hole, and crack is formed in stratum.After the completion of pressure break, put into again
The ball of big level-one opens upper level sliding sleeve and carries out pressure break to last layer stratum.
By the above method, although the transformation to reservoir can be completed, need the multiple tubing string of tripping in that could complete perforation
And sand fracturing.Flow chart is not only increased by the above method as a result, improves operating cost, and reduce pressure break
Accuracy and accuracy.
Invention content
For some or all of of the above-mentioned technical problem in the presence of the prior art, the present invention proposes one kind and is used for
The tool of pressure stage differential style spray envelope pressure and the tubing string comprising it.Using the tool for pressure stage differential style spray envelope pressure, only need
Want tubing string of tripping in just can realize perforation and pressure break.To which the tool for being used for pressure stage differential style spray envelope pressure can reduce operation
Process reduces operating cost, while improving the accuracy and precision of pressure break.
According to an aspect of the invention, it is proposed that a kind of tool for pressure stage differential style spray envelope pressure, including：
The top connection of tubular, inside and outside nozzle and pressure break hole can be connected to by being arranged on the peripheral wall of top connection, and nozzle is located at pressure
The upper end of ceasma,
Connector sleeve in the tubular of the lower end of top connection is set,
Center-pole in the tubular of the lower end of connector sleeve is set,
Packer on the outer wall of connector sleeve and center-pole is set, and packer has on the outer wall of centrally disposed bar
Packing element component,
The lower contact of the tubular of the lower end of centrally disposed bar,
The inner cylinder that is arranged within top connection and can be connect with top connection slidingtype, in the initial state, inner cylinder block spray
Mouth and pressure break hole,
Wherein, after the inner cavity of inner cylinder is closed, under first pressure effect, inner cylinder moves down exposing nozzle, meanwhile, packer
It sets, under second pressure effect, inner cylinder, which moves down, exposes pressure break hole.
In one embodiment, further include the unlatching work of the selective inner cavity for being arranged in inner cylinder and being used to block inner cylinder
Tool, opener include：
Opener main body,
The elastic card upwardly extended by opener main body,
Ball seat in opener lower body is set,
The ball coordinated with ball seat,
Wherein, be provided on elastic card lug boss with the fit depressions that are arranged on the inner wall of inner cylinder.
In one embodiment, baffle ring is set in the lower end of the groove of inner cylinder, baffle ring is configured to relative to inner cylinder axial direction
Sliding, and sealing element is set so that baffle ring is moving up process relative to inner cylinder between the upper surface and inner cylinder of baffle ring
Middle compressive seal.
In one embodiment, elastic boosting ring is set between opener main body and ball seat.
In one embodiment, radially projecting spacing ring is set on the outer wall of baffle ring, is set on the inner wall of connector sleeve
Set in first cylinder base in cylinder base and second, inner cylinder moves down at the first pressure, spacing ring structure be can with first in cylinder base coordinate,
Under second pressure, spacing ring structure be can be detached with baffle ring and so that inner cylinder moves down and with second in cylinder base cooperation.
In one embodiment, packer further includes：
Upper end shell type is fixedly connected on the outer barrel on the outer wall of connector sleeve, and the lower end of outer barrel extended center-pole,
The piston cylinder formed by the upper surface of center-pole, the inner wall of outer barrel and connector sleeve,
Upper end is arranged the piston in piston cylinder, and the lower end of piston between center-pole and outer barrel by extending downwardly and and packing element
Component abuts, and piston is connect with outer barrel slidingtype,
The first pressure transmission hole being arranged on the wall of connector sleeve,
Wherein, the first pressure transmission hole is connected to piston cylinder and is located at the upper end of the upper surface of piston so that pressure fluid enters work
It can push that piston moves downward after plug cylinder.
In one embodiment, the second pressure transmission hole is set on the wall of inner cylinder, and the second pressure transmission hole is configured to move down in inner cylinder
It is connected to afterwards with the first pressure transmission hole.
In one embodiment, the first pressure transmission hole includes the first part for being connected to the second pressure transmission hole, and with
The second part that is connected to piston cylinder of a part, wherein first part are configured to the hole radially extended, and second part structure
Make the hole to axially extend.
In one embodiment, it is configured with reaming in the inlet of first part.
According to another aspect of the invention, it is proposed that a kind of tubing string comprising above-mentioned tool.
Compared with the prior art, the advantages of the present invention are as follows be lowered into storage will have the tubing string of the tool of this structure
In layer, and so that after the inner cavity closing of inner cylinder, the injection pressure liquid into tubing string, when pressure reaches first pressure, inner cylinder is opposite
Expose nozzle in top connection movement, and actuates packing element component operational and make packer setting.To which load fluid can pass through
Nozzle generates high-speed jet and enters stratum, to complete reservoir perforation.After the completion of reservoir perforation, pressure is injected into tubing string again
Power liquid, when pressure reaches second pressure, inner cylinder is mobile relative to top connection and exposes pressure break hole, then can be injected into tubing string
Fracturing fluid, to complete huge discharge pressure break.This is used to seal the tool of pressure for the spray of pressure stage differential style as a result, it is only necessary to which tripping in is primary
Tubing string just can realize perforation and pressure break.To which the tool for being used for pressure stage differential style spray envelope pressure can reduce flow chart, reduce and make
Industry cost.
Description of the drawings
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, in figure：
Fig. 1 shows the work for pressure stage differential style spray envelope pressure according to an embodiment of the invention under original state
Tool；
Fig. 2 shows the work for pressure stage differential style spray envelope pressure after input opener according to an embodiment of the invention
Tool；
Fig. 3 shows the tool for pressure stage differential style spray envelope pressure after exposing nozzle according to an embodiment of the invention；
Fig. 4 shows the work for pressure stage differential style spray envelope pressure behind exposing pressure break hole according to an embodiment of the invention
Tool；
Fig. 5 shows tubing string according to an embodiment of the invention；
In the accompanying drawings, identical component uses identical reference numeral, attached drawing not to be drawn according to actual ratio.
Specific implementation mode
Below in conjunction with attached drawing, the present invention will be further described.
Fig. 1 shows the tool for pressure stage differential style spray envelope pressure under original state according to an embodiment of the invention
100.As shown in Figure 1, tool 100 includes top connection 1, connector sleeve 2, center-pole 3, packer 4, lower contact 5 and the inner cylinder of tubular
6.Wherein, top connection 1 is configured to tubular, and for being connect with oil pipe 8, tool 100 is sent in reservoir.Meanwhile upper
Setting connection inside and outside nozzle 7 and pressure break hole 9 on the peripheral wall of connector 1, and nozzle 7 is located at the upper end in pressure break hole 9.Connector sleeve 2
It is arranged in the lower end of top connection 1, and is cylindrical in shape.Center-pole 3 is arranged in the lower end of connector sleeve 2, and is cylindrical in shape.Packer 4 is arranged
It on the lower end outer wall of connector sleeve 2, and extends on the outer wall of center-pole 3, between isolating tool 100 and casing 10
Annular space 11.Also, packer 4 has the packing element component 12 on the outer wall of centrally disposed bar 3, under the action of pressure fluid, glue
Cartridge module 12 operates so that packer 4 is set.The lower end of 5 centrally disposed bar 3 of lower contact, and it is configured to tubular.Inner cylinder 6 is arranged
It is connect within top connection 1, and with 1 slidingtype of top connection.Under original state, inner cylinder 6 blocks nozzle 7 and pressure break hole 9, such as Fig. 1
It is shown.At the first pressure, inner cylinder 6, which moves down, exposes nozzle 7, as shown in Figure 3.Under second pressure, inner cylinder 6 continues to move down, and
Expose pressure break hole 9, as shown in Figure 4.
As a result, after will there is the tubing string 50 of the tool 100 of this structure to be lowered into reservoir, and make the inner cavity of inner cylinder 6
Closing, then the injection pressure liquid into tubing string 50, under first pressure effect, nozzle 7 exposes, as shown in Figure 3.Thus can be to pipe
Load fluid is injected in column 50, load fluid can be by nozzle 7 generates high-speed jet into stratum, to complete reservoir perforation.
After the completion of reservoir perforation, continue the pumping pressure liquid into tubing string 50, when pressure reaches second pressure, pressure break hole 9 is exposed, and is such as schemed
Shown in 4, pressure break process can be carried out at this time.This is used to seal the tool 100 of pressure for the spray of pressure stage differential style as a result, it is only necessary to tripping in
One time tubing string 50 just can realize perforation and pressure break.To which the tool 100 for being used for pressure stage differential style spray envelope pressure can reduce operation work
Sequence reduces operating cost.Meanwhile during reservoir is transformed, due to just carrying out pressure break in adjacent locations after the completion of perforation, thus
The tool 100 can guarantee the accuracy and precision of pressure break, to improve fracturing effect.In addition, during stratum is transformed,
Can be realized by once blocking inner cylinder 6 just packer 4 set with perforation and its fracturing operation, when creating a further reduction construction
Between, reduce operating expenses.
In one embodiment, tool 100 includes the opener 40 of the inner cavity for blocking inner cylinder 6, as shown in Figure 2.
Also, opener 40 includes opener main body 41, elastic card 42, ball seat 21 and ball 22.Wherein opener main body 41
It is configured to tubular, for being arranged in inner cylinder 6.Elastic card 42 is arranged in the upper end of opener main body 41.Preferably, bullet
Property card 42 can be multiple, and be circumferentially distributed.Ball seat 21 is arranged in the lower end of opener main body 41 for placement
Ball 22.Protrusion 43 is provided on elastic card 42.Correspondingly, fluted 44 are arranged on inner cylinder 6 for matching with protrusion 43
It closes.During opener 40 is put into inner cylinder 6, after opener 40 encounters matched inner cylinder 6, elastic card 42
It is flared out, so that protrusion 43 coordinates with groove 44, to which opener 40 is positioned on inner cylinder 6.In this case, interior
The internal circulation access of cylinder 6 is blocked, then can actuate inner cylinder 6 by way of injection pressure liquid at this time and move down.
It should be noted that can be in by the elastic card 42 and protrusion 43 that different sizes and structure are arranged with matching
Inner cylinder 6 in different series.Moving down for inner cylinder 6 can not only be realized by the opener 40 of this structure as a result,.In input one
After secondary opener 40, just perforation and pressure break can be carried out to corresponding stratum.The all-pass of tubing string 50 is also ensured by this structure
Diameter, and then realize " countless " grade pressing crack construction.
According to the present invention, on direction from top to bottom, in first step is arranged on the lower end inner wall of the groove 44 of inner cylinder 6
45.Meanwhile locating part 47 is set on the lower end inner wall of inner cylinder 6.Locating part 47 is configured to tubular and is fixedly connected with inner cylinder 6,
And form radially inwardly projecting second step 46.Correspondingly, baffle ring 48, and 48 structure of baffle ring are set in the lower end of groove 44
It makes as tubular.Also, the protrusion ring 49 projected radially outwardly is set in the axially intermediate portion of the outer wall in baffle ring 48.This is protruded
The lower face of ring 49 is connected on second step 46, so that the upper surface of baffle ring 48 is opposite with first step 45, and baffle ring 48
Lower face extend the lower face of inner cylinder 6.Meanwhile sealing element is set between the upper surface of baffle ring 48 and first step 45
51.Preferably, sealing element 51 can be gum cover.Opener 40 is put into as a result, and opener 40 is removed with inner cylinder 6
It moves, after cylinder base 28 is compound (compound by cylinder base 28 in spacing ring 55 and first) in baffle ring 48 and first, inner cylinder 6 and locating part
47 continue to move down, and compressive seal 51 expands and improves the sealing between inner cylinder 6 and opener 40.It, can by this set
The leakproofness between inner cylinder 6 and opener 40 is improved, to ensure that inner cylinder 6 can be moved down smoothly after injection pressure liquid.
According to the present invention, elastic boosting ring 52 is set between 21 axial direction of opener main body 41 and ball seat.Preferably, bullet
Property boosting ring 52 can be rubber ring.The gap between opener 40 and oil pipe 8 etc. is reduced by setting elasticity boosting ring 52.
As a result, by pressurization be sent into opener 40 during, reduce leakage so that opener 40 can more successfully by
It is sent into.
According to the present invention, packer 4 further includes outer barrel 16, piston cylinder 13, piston 14 and the first pressure transmission hole 15.Wherein, outside
The upper end shell type of cylinder 16 is fixedly connected on the outer wall of connector sleeve 2, and outer barrel 16 extends downwardly and crosses center-pole 3.To, by
The upper surface of center-pole 3, the inner wall of outer barrel 16 and connector sleeve 2 form piston cylinder 13.The upper end of piston 14 is arranged in piston cylinder
In 13, the lower end of piston 14 between center-pole 3 and outer barrel 16 by extending downwardly and being abutted with packing element component 12.Meanwhile initial
Under state, piston 14 is connect with outer barrel 16 by the second shear pin 17.First pressure transmission hole 15 is arranged on the outer wall of connector sleeve 2.
And the first pressure transmission hole 15 can be connected to piston cylinder 13, with by the first pressure transmission hole 15 into piston cylinder 13 injection pressure liquid.Separately
Outside, the first pressure transmission hole 15 is located at the upper end of the upper surface of piston 14, so that piston 14 can be accepted from the first pressure transmission hole 15
Pressure fluid.Correspondingly, the second pressure transmission hole 53 is set on the wall of inner cylinder 6.In the initial state, the first pressure transmission hole 15 is by inner cylinder
6 closings.During injection pressure liquid, inner cylinder 6 can move down and the second pressure transmission hole 53 is connected to the first pressure transmission hole 15.By
This, pressure fluid enters piston cylinder 13 via the second pressure transmission hole 53 and the first pressure transmission hole 15 by the inner cavity of inner cylinder 6 and pushes piston
14, under pressure, the second shear pin 17 is cut, and so that piston 14 moves down, and the piston 14 moved down pushes packing element
Component 12, so that packing element component 12 acts on and insulates annular space 11.
In order to ensure that pressure liquid energy is flowed by the second pressure transmission hole 53 in the first pressure transmission hole 15, the setting of the second pressure transmission hole 53
On the inner cylinder 6 of the upper end of sealing element 51.Also need to be explanatorily, after inner cylinder 6 moves down in place, the second pressure transmission hole 53 and first
Pressure transmission hole 15 can be connected to respect to contact.Certainly, the second pressure transmission hole 53 and the first pressure transmission hole 15 can also pass through the company of being formed in
Gap connection between female connector 2 and inner cylinder 6.In the latter case, the axial dimension that inner cylinder 6 can be reduced relatively, to carry
The intensity of high inner cylinder 6 reduces production cost.
Preferably, the second part 15 " that the first pressure transmission hole 15 may include first part 15 ' and is connected to first part 15 '.
Wherein, first part 15 ' radially extends for being connected to the second pressure transmission hole 53, and second part 15 " is axially extending with first
Part 15 ' is connected to piston cylinder 13, and for providing normal pressure for piston 14, more effectively actuation piston 14 moves.Into one
Preferably, the inlet (namely needing and 53 connectivity part of the second pressure transmission hole) of first part 15 ' is configured to flaring form to step, with
Preferably receive the pressure fluid of the second pressure transmission hole 53 supply.The second pressure transmission hole 53 can be enable more easily to connect by this set
By pressure fluid, while reducing the required precision of tool 100.
In order to ensure that the safety of packing, packing element component 12 include multiple packing elements 26, and between adjacent packing element 26
Spacer ring 27 is set.For example, packing element component 12 includes three packing elements.By this arrangement enhance the packing effect of packer 4, from
And it ensure that the perforation and pressure break efficiency of tool 100.
In order to enable 26 uniform force of packing element, is arranged push rod 29, to transmit piston between piston 14 and packing element component 12
In 14 power to packing element component 12.The upper end of push rod 29 is fixedly connected with piston 14, and lower end is connect with 3 slidingtype of center-pole, and
And lower face is abutted with packing element 26.
Packing element component 12 retracts in order to prevent, and the first ratchet 18 is arranged on the outer wall of center-pole 3.Meanwhile in piston 14
Inner wall on the second ratchet 19 is set.During piston 14 moves down, the second ratchet 19 also moves down therewith, waits for piston
14 movements in place so that the expansion of packing element 26 and after insulating annular space 11, the second ratchet 19 and the cooperation of the first ratchet 18, to prevent glue
Cylinder 26 retracts.Safety is set by what this set can guarantee packer 4, to ensure subsequent perforation and fracturing operation.
According to the present invention, cylinder base 54 in cylinder base 28 and second is set on the inner wall of connector sleeve 2 in first.Wherein, second
The lower end of cylinder base 28 is arranged in first in interior cylinder base 54.And cylinder base 54 is configured to step in cylinder base 28 and second in first
Shape.Correspondingly, spacing ring 55 is set on the lower end outer wall of baffle ring 48.Spacing ring 55 is configured to radially outward be dashed forward by baffle ring 48
The ring-type gone out.In the initial state, spacing ring 55 is connected to by the 4th shear pin 56 on baffle ring 48.In addition, inner cylinder 6 passes through
One shear pin 20 is set on connector sleeve 2.After the inner cavity of inner cylinder 6 is closed, when pressure reaches first pressure, the first shear pin
20 are cut, inner cylinder 6 drive spacing ring 55 move down so that spacing ring 55 can with first in cylinder base 28 it is compound, to limit inner cylinder
6 position.When pressure reaches second pressure, the 4th shear pin 56 is cut, inner cylinder 6 continue to move down and with second in cylinder base 54
It is compound, to limit the position of inner cylinder 6.By above structure, the movement position of inner cylinder 6 can guarantee, to ensure perforation and pressure break
Precision.Also, above structure is simple, it is only necessary to which blocking an inner cylinder 6 just can make inner cylinder 6 move and be in different positions
It sets, it is easy to operate.
In a preferred embodiment, tool 100 further includes the deblocking baffle ring 23 being arranged in 4 lower end of packer.Deblocking
The upper end of baffle ring 23 is socketed on the outer wall of center-pole 3, and is connect with 3 slidingtype of center-pole.Unseal baffle ring 23 upper surface with
Packing element 26 abuts, and lower end is fixedly connected by third shear pin 24 with lower contact 5.Meanwhile unseal baffle ring 23 and center-pole 3 and
Lower contact 5 forms the first space 25, to provide avoiding space.In the case where needing deblocking packer 4, top connection may lift up
1, center-pole 3 and lower contact 5, which have, follows the trend that top connection 1 moves upwards, due to packing element 26 and 11 frictional contact of annular space,
Then third shear pin 24 is cut under a stretching force.After third shear pin 24 is cut, the packing element 26 of expansion pushes deblocking
Baffle ring 23 is moved downward with deblocking packer 4.The operational security that tool 100 can be improved by this set, for prominent
By tubing string 50 by being proposed in sleeve 10 in the case of hair.
The invention further relates to a kind of tubing strings 50.Tubing string 50 includes oil pipe 8 and the tool 100 being fixedly connected with oil pipe 8, such as schemes
Shown in 5.In order to improve reservoir reconstruction scale, working efficiency is improved.It can be arranged on one-trip string 50 multiple sequentially connected
Tool 100.As a result, after tubing string 50 is lowered into stratum, can step -by -step switch opener 40, actuate step by step inner cylinder 6 movement,
To carry out perforation and pressure break step by step.
The method for being transformed stratum using the tubing string 50 with tool 100 is discussed in detail below according to Fig. 1-5.
Tubing string 50 comprising oil pipe 8 and tool 100 is lowered into casing 10 by the first step, and makes tubing string 50 and casing
Annular space 11 is formed between 10.
Second step puts into opener 40 into oil pipe 8.Opener 40 and the inner cylinder 6 of corresponding stage coordinate, in closure
The internal channel of cylinder 6.
Third walks, the pumping pressure liquid into oil pipe 8.When pressure reaches first pressure (such as first pressure is 15-25MPa)
When, the first shear pin 20 is cut, then inner cylinder 6 moves down together with spacing ring 55, and makes cylinder base 28 in spacing ring 55 and first
Cooperation, so that nozzle 7 exposes, while the second pressure transmission hole 53 is connected to the first pressure transmission hole 15.At this point, pressure fluid passes through second
Pressure transmission hole 53 flows into the first pressure transmission hole 15 and enters eventually into piston cylinder 13, and piston 14 is pushed to move downward so that push rod
29 act on packing element 26, and thus the expansion of packing element 26 is to realize that packer 4 is set.
4th step injects load fluid, the throttling action that load fluid passes through nozzle 7 into oil pipe 8 after packer 4 is set
And high speed projects outward, load fluid is shot through casing 10 and enters stratum, to form hole in stratum.
5th step, after perforation, the injection pressure liquid into oil pipe 8 is matched since opener 40 is constantly in inner cylinder 6
Conjunction state so that inner cylinder 6 is forced downwards.When pressure reaches second pressure (for example, second pressure is 35-45MPa), the
Four shear pins 56 are cut, and inner cylinder 6 continues to move down and so that cylinder base 54 coordinates in baffle ring 48 and second, to expose pressure break hole 9.
6th step injects fracturing fluid into oil pipe 8, and fracturing fluid is entered by pressure break hole 9 at the hole formed in the earth formation,
To complete pressure break.In the process, in order to increase discharge capacity, fracturing effect is improved, while injecting fracturing fluid into oil pipe 8,
Fracturing fluid can also be injected into annular space 11 to carry out fluid infusion.
After the perforating and fracturing for completing corresponding stage, second step is repeated to the 6th step, to complete the perforating and fracturing of next stage.From
And the multi-stage perforator and pressure break of reservoir can be completed by one-trip string 50, reduce working procedure as a result, improves work
Efficiency.
In the application, the orientation term "up" and "down" is reference with the orientation residing for 100 tripping in stratum of tool.
The foregoing is merely the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, Ren Heben
The technical staff in field can be easy to carry out and be altered or varied in technical scope disclosed by the invention, and this change or change
Change should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (10)
1. a kind of tool for pressure stage differential style spray envelope pressure, which is characterized in that including：
The top connection of tubular, inside and outside nozzle and pressure break hole, the nozzle position can be connected to by being arranged on the peripheral wall of the top connection
Upper end in the pressure break hole,
Connector sleeve in the tubular of the lower end of the top connection is set,
Center-pole in the tubular of the lower end of the connector sleeve is set,
Packer on the outer wall of the connector sleeve and the center-pole is set, and the packer, which has, to be arranged at the center
Packing element component on the outer wall of bar,
Lower contact in the tubular of the lower end of the center-pole is set,
The inner cylinder that is arranged within the top connection and can be connect with the top connection slidingtype, it is in the initial state, described interior
Cylinder blocks the nozzle and the pressure break hole,
Wherein, after the inner cavity of the inner cylinder is closed, under first pressure effect, the inner cylinder, which moves down, exposes the nozzle, together
When, the packer setting, under second pressure effect, the inner cylinder, which moves down, exposes the pressure break hole.
2. tool according to claim 1, which is characterized in that further include that selectivity is arranged in the inner cylinder and for sealing
The opener of the inner cavity of the inner cylinder is blocked up, the opener includes：
Opener main body,
The elastic card upwardly extended by the opener main body,
Ball seat in the opener lower body is set,
The ball coordinated with the ball seat,
Wherein, be provided on the elastic card lug boss with the fit depressions that are arranged on the inner wall of the inner cylinder.
3. tool according to claim 2, which is characterized in that in the lower end of the groove of the inner cylinder, baffle ring is set, it is described
Baffle ring is configured to slide axially relative to the inner cylinder, and sealing element is arranged between the upper surface and inner cylinder of the baffle ring
So that the baffle ring compresses the sealing element during being moved up relative to the inner cylinder.
4. tool according to claim 2 or 3, which is characterized in that between the opener main body and the ball seat
The elastic boosting ring of setting.
5. tool according to claim 3, which is characterized in that radially projecting limit is arranged on the outer wall of the baffle ring
Cylinder base in cylinder base and second is arranged in first in ring on the inner wall of the connector sleeve, and the inner cylinder moves down at the first pressure, institute
State spacing ring structure be can with described first in cylinder base coordinate, under second pressure, the spacing ring structure be can be with the gear
Ring detach and so that the inner cylinder moves down and with described second in cylinder base coordinate.
6. tool according to claim 1, which is characterized in that the packer further includes：
Upper end shell type is fixedly connected on the outer barrel on the outer wall of the connector sleeve, and the lower end of the outer barrel extended the center
Bar,
The piston cylinder formed by the upper surface of the center-pole, the inner wall of the outer barrel and the connector sleeve,
The piston in the piston cylinder is arranged in upper end, and the lower end of the piston is by downward between the center-pole and the outer barrel
Extending and is abutted with the packing element component, the piston is connect with the outer barrel slidingtype,
The first pressure transmission hole being arranged on the wall of the connector sleeve,
Wherein, first pressure transmission hole is connected to the piston cylinder and the upper end of the upper surface that is located at the piston is so that pressure
Liquid enter the piston cylinder after can push described in piston moves downward.
7. tool according to claim 6, which is characterized in that the second pressure transmission hole is set on the wall of the inner cylinder, it is described
Second pressure transmission hole is configured to be connected to first pressure transmission hole after the inner cylinder moves down.
8. tool according to claim 7, which is characterized in that first pressure transmission hole include for second pressure transmission
The first part of hole connection, and the second part that is connected to the first part and the piston cylinder, wherein described first
Part is configured to the hole radially extended, and the second part is configured to the hole axially extended.
9. tool according to claim 8, which is characterized in that be configured with reaming in the inlet of the first part.
10. a kind of tubing string, which is characterized in that include the tool according to any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610038894.2A CN105696995B (en) | 2016-01-20 | 2016-01-20 | The tool of envelope pressure is sprayed for pressure stage differential style and includes its tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610038894.2A CN105696995B (en) | 2016-01-20 | 2016-01-20 | The tool of envelope pressure is sprayed for pressure stage differential style and includes its tubing string |
Publications (2)
| Publication Number | Publication Date |
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| CN105696995A CN105696995A (en) | 2016-06-22 |
| CN105696995B true CN105696995B (en) | 2018-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610038894.2A Active CN105696995B (en) | 2016-01-20 | 2016-01-20 | The tool of envelope pressure is sprayed for pressure stage differential style and includes its tubing string |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302631A (en) * | 2019-07-29 | 2021-02-02 | 中国石油化工股份有限公司 | Pressure measuring device and tubular column |
| CN110685626B (en) * | 2019-10-31 | 2024-07-05 | 东营市瑞丰石油技术发展有限责任公司 | Packer setting tool and packer setting service pipe column |
| CN115506765B (en) * | 2022-09-26 | 2024-10-18 | 中煤科工西安研究院(集团)有限公司 | Fixed-point injection single-seal ring air fluid replacement two-way fracturing device and method |
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| EP1840324B1 (en) * | 2006-03-31 | 2012-08-29 | Services Pétroliers Schlumberger | Method and apparatus for selective treatment of a perforated casing |
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| RU2324050C2 (en) * | 2006-06-26 | 2008-05-10 | Государственное образовательное учреждение высшего профессионального образования "Тюменский государственный нефтегазовый университет" | Method of hydrolic fracturing of formation of condensate borehole |
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| CN105696995A (en) | 2016-06-22 |
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