CN105696993B - The instrument of envelope pressure is sprayed for pressure stage differential style and includes its tubing string - Google Patents
The instrument of envelope pressure is sprayed for pressure stage differential style and includes its tubing string Download PDFInfo
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- CN105696993B CN105696993B CN201610037416.XA CN201610037416A CN105696993B CN 105696993 B CN105696993 B CN 105696993B CN 201610037416 A CN201610037416 A CN 201610037416A CN 105696993 B CN105696993 B CN 105696993B
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- 239000007921 spray Substances 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 38
- 238000012856 packing Methods 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 description 25
- 238000000034 method Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000003292 glue Substances 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
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 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
- 238000009434 installation Methods 0.000 description 1
- 239000003208 petroleum Substances 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
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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)
Abstract
The present invention proposes a kind of instrument for pressure stage differential style spray envelope pressure and includes its tubing string.The instrument includes top connection, adapter sleeve, center-pole, packer, lower contact and the inner cylinder of tubular.Wherein, nozzle and pressure break hole are set in top connection, and inner cylinder is arranged on top connection inwall for closure nozzle and pressure break hole.Under first pressure effect, inner cylinder moves down and exposes nozzle, and packer setting.Nozzle perforation can be passed through afterwards.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 instrument.
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 used for pressure stage differential style and sprayed
Seal the instrument of pressure and include its tubing string.
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 be transformed targetedly reservoir, expand oil gas
The drainage area of payzone, improve the rate of oil and gas recovery.
In the prior art, the method for pressure break is carried 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, pitching is passed through
Mode open the first order sliding sleeve of packer, to expose the first order pressure break hole coordinated with hole.Finally, injected into tubing string
Fracturing fluid, fracturing fluid is entered in hole by pressure break hole, and crack is formed in stratum.After the completion of pressure break, put into again
The ball of big one-level 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, the multiple tubing string of tripping in is needed to complete perforation
And sand fracturing.Thus, flow chart is not only increased by the above method, improves operating cost, and reduce pressure break
Accuracy and accuracy.
The content of the invention
For some or all of of the above-mentioned technical problem in the presence of prior art, the present invention proposes one kind and is used for
The instrument and include its tubing string that pressure stage differential style spray envelope is pressed.It is used for the instrument of pressure stage differential style spray envelope pressure using this, only needs
Want tubing string of tripping in just can realize perforation and pressure break.So as to which the instrument for being used for pressure stage differential style spray envelope pressure can reduce operation
Process, operating cost is reduced, while improve the accuracy and precision of pressure break.
According to an aspect of the invention, it is proposed that a kind of instrument 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 by being set on the perisporium of top connection, and nozzle is positioned at pressure
The upper end of ceasma,
The adapter sleeve of the tubular of the lower end of top connection is arranged on,
The center-pole of the tubular of the lower end of adapter sleeve is arranged on,
The packer being arranged on the outer wall of adapter sleeve and center-pole, packer have 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 can be connected within top connection and with top connection slidingtype is arranged on, in an initial condition, inner cylinder closure spray
Mouth and pressure break hole,
Wherein, after the closing of the inner chamber of inner cylinder, under first pressure effect, inner cylinder, which moves down, exposes nozzle, meanwhile, packer
Set, under second pressure effect, inner cylinder, which moves down, exposes pressure break hole.
In one embodiment, packer also includes：
Upper end shell type is fixedly connected on the outer barrel on the outer wall of adapter sleeve, and the lower end of outer barrel extended center-pole,
The piston cylinder formed by the upper surface of center-pole, the inwall of outer barrel and adapter sleeve,
Upper end is arranged on 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 is abutted, and piston is connected with outer barrel slidingtype,
The first pressure transmission hole being arranged on the wall of adapter sleeve,
Wherein, the first pressure transmission hole connects with piston cylinder and is located at the upper end of the upper surface of piston to cause pressure fluid enters to live
Piston can be promoted to move 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
Connected afterwards with the first pressure transmission hole.
In one embodiment, the first pressure transmission hole includes being used for the Part I that is connected with the second pressure transmission hole, and with the
The Part II that is connected with piston cylinder of a part, wherein Part I are configured to the hole radially extended, and Part II structure
The hole for making to axially extend.
In one embodiment, it is configured with reaming in the porch of Part I.
In one embodiment, radially projecting spacing ring is set on the lower end outer wall of inner cylinder, in the inwall of adapter sleeve
Upper to set in first cylinder base in cylinder base and second, inner cylinder moves down at the first pressure, spacing ring structure for can with first in cylinder base
Coordinate, under second pressure, spacing ring structure for can be separated with inner cylinder and cause inner cylinder move down and with second in cylinder base cooperation.
In one embodiment, in addition to the deblocking baffle ring of packer lower end is arranged on, the upper end for unsealing baffle ring is socketed in
Abutted on the outer wall of center-pole and with packing element component, lower end is fixedly connected by the 3rd shear pin with lower contact, deblocking baffle ring with
Center-pole and lower contact form the first space for unsealing baffle ring and lower contact relative movement.
In one embodiment, be configured with ball seat on the inwall of inner cylinder, in the pitching into inner cylinder, ball seat be configured to
Ball coordinates to close the inner chamber of inner cylinder.
According to another aspect of the invention, it is proposed that a kind of tubing string, it includes above-mentioned instrument.
In one embodiment, tubing string includes multiple instruments being sequentially connected, and on direction from top to bottom, instrument
The diameter of ball seat of inner cylinder be sequentially reduced.
Compared with prior art, it is an advantage of the current invention that the tubing string of the instrument with this structure is being lowered into storage
In layer, and so that after the inner chamber closing of inner cylinder, pressure fluid is injected into tubing string, when pressure reaches first pressure, inner cylinder is relative
Expose nozzle in top connection movement, and actuate packing element component operational and make packer setting.So as to which load fluid can pass through
Nozzle produces 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.Thus, the instrument of pressure stage differential style spray envelope pressure is used for using this, it is only necessary to which tripping in be once
Tubing string just can realize perforation and pressure break.So as to which the instrument for being used for pressure stage differential style spray envelope pressure can reduce flow chart, reduce and make
Industry cost.
Brief description of the drawings
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing, in figure：
Fig. 1 shows the work according to an embodiment of the invention that be used for pressure stage differential style spray envelope pressure being under original state
Tool；
Fig. 2 shows the instrument for being used for pressure stage differential style spray envelope pressure after input ball according to an embodiment of the invention；
Fig. 3 shows the instrument according to an embodiment of the invention that be used for pressure stage differential style spray envelope pressure exposed after nozzle；
Fig. 4 shows the instrument according to an embodiment of the invention that be used for pressure stage differential style spray envelope pressure exposed behind pressure break hole
Fig. 5 shows tubing string according to an embodiment of the invention；
In the accompanying drawings, identical part uses identical reference, and accompanying drawing is not drawn according to the ratio of reality.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 shows the instrument for being used for pressure stage differential style spray envelope pressure under original state according to an embodiment of the invention
100.As shown in figure 1, instrument 100 includes top connection 1, adapter 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 connected with oil pipe 8, instrument 100 is sent in reservoir.Meanwhile upper
The inside and outside nozzle 7 of connection and pressure break hole 9 are set on the perisporium of joint 1, and nozzle 7 is located at the upper end in pressure break hole 9.Adapter sleeve 2
The lower end of top connection 1 is arranged on, and is cylindrical in shape.Center-pole 3 is arranged on the lower end of adapter sleeve 2, and is cylindrical in shape.Packer 4 is set
On the lower end outer wall of adapter sleeve 2, and extend on the outer wall of center-pole 3, between isolating tool 100 and sleeve pipe 10
Annular space 11.Also, packer 4 has the packing element component 12 on the outer wall of centrally disposed bar 3, in the presence of pressure fluid, glue
Cartridge module 12, which operates, causes packer 4 to set.The lower end of the centrally disposed bar 3 of lower contact 5, and it is configured to tubular.Inner cylinder 6 is set
It is connected within top connection 1, and with the slidingtype of top connection 1.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.
Thus, after the tubing string 50 of the instrument 100 with this structure is lowered into reservoir, and the inner chamber of inner cylinder 6 is caused
Closing, then pressure fluid is injected into tubing string 50, under first pressure effect, nozzle 7 exposes, as shown in Figure 3.So that can be to pipe
Load fluid is injected in post 50, load fluid can produce high-speed jet to enter stratum, to complete reservoir perforation by nozzle 7.
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 now carried out.Thus, the instrument 100 of pressure stage differential style spray envelope pressure is used for using this, it is only necessary to tripping in
One time tubing string 50 just can realize perforation and pressure break.So as to which the instrument 100 for being used for pressure stage differential style spray envelope pressure can reduce operation work
Sequence, reduce operating cost.Meanwhile during reservoir is transformed, due to just carrying out pressure break in adjacent locations after the completion of perforation, thus
The instrument 100 can guarantee that the accuracy and precision of pressure break, so as to improve fracturing effect.In addition, during stratum is transformed,
By once block inner cylinder 6 just can realize packer 4 set with perforation and its fracturing operation, when create a further reduction construction
Between, reduce operating expenses.
According to the present invention, packer 4 also includes outer barrel 16, piston cylinder 13, the pressure transmission hole 15 of piston 14 and first.Wherein, outside
The upper end shell type of cylinder 16 is fixedly connected on the outer wall of adapter sleeve 2, and outer barrel 16 extends axially downward and crosses center-pole 3.From
And piston cylinder 13 is formd by the upper surface of center-pole 3, the inwall of outer barrel 16 and adapter sleeve 2.The upper end of piston 14 is arranged on work
In plug cylinder 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
Under original state, piston 14 is connected with outer barrel 16 by the second shear pin 17.And the first pressure transmission hole 15 can connect with piston cylinder 13
It is logical, to inject pressure fluid into piston cylinder 13 by the first pressure transmission hole 15.In addition, the first pressure transmission hole 15 is located under pressure break hole 9
Hold and be located at the upper end of the upper surface of piston 14, to enable piston 14 to accept the pressure fluid from the first pressure transmission hole 15.Relatively
Ying Di, the second pressure transmission hole 53 is set on the wall of inner cylinder 6.In an initial condition, the first pressure transmission hole 15 is closed by inner cylinder 6.Noting
Enter pressure fluid and when pressure reaches first pressure, inner cylinder 6 can move down and so that the second pressure transmission hole 53 connects with the first pressure transmission hole 15
It is logical.Meanwhile pressure fluid enters piston cylinder 13 by the second pressure transmission hole 53 and the first pressure transmission hole 15 and promotes piston 14, makees in pressure
Under, the second shear pin 17 is cut, and make it that piston 14 moves down, and the piston 14 moved down promotes packing element component 12, so that
Packing element component 12 is obtained to act on and insulate annular space 11.
It should be noted that after inner cylinder 6 moves down in place, the second pressure transmission hole 53 relative can contact with the first pressure transmission hole 15
Formula connects.Certainly, between the second pressure transmission hole 53 and the first pressure transmission hole 15 can also be by forming between adapter sleeve 2 and inner cylinder 6
Gap connects.In the latter case, life so as to improve the intensity of inner cylinder 6, can be reduced with the axial dimension of relatively reduced inner cylinder 6
Produce cost.
Preferably, the first pressure transmission hole 15 can include Part I 15 ' and the Part II 15 " connected with Part I 15 '.
Wherein, Part I 15 ' is radially extended for being connected with the second pressure transmission hole 53, and Part II 15 " is axially extending with first
Part 15 ' connects with piston cylinder 13, and for providing normal pressure for piston 14, more effectively actuation piston 14 moves.Enter one
Preferably, the porch (namely needing and the connectivity part of the second pressure transmission hole 53) of Part I 15 ' is configured to enlarging form to step, with
Preferably receive the pressure fluid of the second pressure transmission hole 53 supply.By this set can the second pressure transmission hole 53 can more easily connect
Be stressed liquid, while reduces the required precision of instrument 100.
In order to ensure the security of packing, packing element component 12 includes 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 instrument 100.
In order that obtaining the uniform force of packing element 26, push rod 29 is set between piston 14 and packing element component 12, to transmit piston
14 power is on packing element component 12.The upper end of push rod 29 is fixedly connected with piston 14, and lower end is connected with the slidingtype of center-pole 3, and
And lower surface abuts with packing element 26.
In order to prevent packing element component 12 from retracting, the first ratchet 18 is set on the outer wall of center-pole 3.Meanwhile in piston 14
Inwall on the second ratchet 19 is set.During piston 14 moves down, the second ratchet 19 also moves down therewith, treats piston
14 move into place so that packing element 26 expands and after insulating annular space 11, the second ratchet 19 coordinates with the first ratchet 18, to prevent glue
Cylinder 26 retracts.Security is set by what this set can guarantee that packer 4, so as to ensure follow-up perforation and fracturing operation.
According to the present invention, cylinder base 54 in cylinder base 28 and second is set on the inwall of adapter sleeve 2 in first.Wherein, second
Interior cylinder base 54 is arranged on the lower end of cylinder base 28 in first.And cylinder base 54 is configured to step in cylinder base 28 and second in first
Shape.Accordingly, spacing ring 55 is set on the lower end outer wall of inner cylinder 6.Spacing ring 55 is configured to radially outward dashing forward by inner cylinder 6
The ring-type gone out.In an initial condition, spacing ring 55 is connected on inner cylinder 6 by the 4th shear pin 56.In addition, inner cylinder 6 passes through
One shear pin 20 is set on adapter sleeve 2.After being closed in the inner chamber of inner cylinder 6, when pressure reaches first pressure, the first shear pin
20 are cut, and inner cylinder 6 drives spacing ring 55 to move down to enable cylinder base 28 in spacing ring 55 and first compound, so as 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 said structure, can guarantee that inner cylinder 6 is in different positions, so as to ensure perforation
With the precision of pressure break.Also, said structure is simple, it is only necessary to which blocking an inner cylinder 6 just can be so that inner cylinder 6 moves and in difference
Position, it is easy to operate.
In a preferred embodiment, ball seat 21 is configured with the inwall of inner cylinder 6.After by the tripping in stratum of instrument 100,
Can be by pitching 22 in the inward-facing cylinder 6 in ground, as shown in Figure 2.Ball 22 coordinates with ball seat 21, has reached the inner chamber of closing inner cylinder 6
Purpose.Now, pumping pressure liquid can be moved into instrument 100 with actuating inner cylinder 6.
In a preferred embodiment, instrument 100 also includes the deblocking baffle ring 23 for being arranged on the lower end of packer 4.Deblocking
The upper end of baffle ring 23 is socketed on the outer wall of center-pole 3, and is connected with the slidingtype of center-pole 3.Unseal baffle ring 23 upper surface with
Packing element 26 is abutted, and lower end is fixedly connected by the 3rd 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 is moved upwards, due to packing element 26 and the frictional contact of annular space 11,
Then the 3rd shear pin 24 is cut under a stretching force.After the 3rd shear pin 24 is cut, baffle ring 23 and the phase of lower contact 5 are unsealed
To moving so that the resilience of packing element 26 so as to deblocking packer 4.The operational security of instrument 100 can be improved by this set,
For under emergency case by tubing string 50 by being proposed in sleeve 10.
The invention further relates to a kind of tubing string 50.Tubing string 50 includes oil pipe 8 and the instrument 100 being fixedly connected with oil pipe 8, such as schemes
Shown in 4.In order to improve reservoir reconstruction scale, operating efficiency is improved.Multiple be sequentially connected can be set on one-trip string 50
Instrument 100.And in order to realize the closure of inner cylinder 6, on direction from top to bottom, the ball seat 21 of the different inner cylinders 6 of instrument 100
Diameter be sequentially reduced.Thus, after tubing string 50 is lowered into stratum, can be promoted step by step by putting into the ball 22 of different-diameter
Dynamic inner cylinder 6 moves, to carry out perforation and pressure break step by step.Especially during to carrying out perforation and pressure break when level, due to purpose
Layer on packer 4 it is not actuated set, target zone and following packer 4 are realized and set.Thus, with this structure
Face-pumping send equipment requirement low to instrument over the ground, it is, in the case where ground installation is constant, can realize that operation discharge capacity is higher, pressure
Split the more preferable purpose of effect.
The method that transformation stratum is carried out using the tubing string 50 with instrument 100 is discussed in detail below according to Fig. 1-5.
The first step, the tubing string 50 comprising oil pipe 8 and instrument 100 is lowered into sleeve pipe 10, and causes tubing string 50 and sleeve pipe
Annular space 11 is formed between 10.
Second step, ball 22 is put into oil pipe 8.The ball seat 21 of ball 22 and the inner cylinder 6 of corresponding stage coordinates, to block inner cylinder 6
Internal channel.
3rd step, 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 causes cylinder base 28 in spacing ring 55 and first
Coordinate, so that nozzle 7 exposes, while the second pressure transmission hole 53 connects with the first pressure transmission hole 15.Now, pressure fluid passes through second
Pressure transmission hole 53 flows into the first pressure transmission hole 15 and entered eventually into piston cylinder 13, and promotes piston 14 to move downward so that push rod 29
Packing element 26 is acted on, thus packing element 26 is expanded to realize that packer 4 is set.
4th step, after packer 4 is set, load fluid, the throttling action that load fluid passes through nozzle 7 are injected into oil pipe 8
And outwards project at a high speed, load fluid is shot through sleeve pipe 10 and enters stratum, so as to form hole in stratum.
5th step, after perforation terminates, pressure fluid is injected into oil pipe 8, due to the cooperation of ball 22 and ball seat 21, within causing
Cylinder 6 is forced downwards.When pressure reaches second pressure (for example, second pressure is 35-45MPa), the quilt of the 4th shear pin 56
Cut, inner cylinder 6 continue to move down and with second in cylinder base 54 coordinate, so as to expose pressure break hole 9.
6th step, fracturing fluid is injected into oil pipe 8, and fracturing fluid is formed in the earth formation when entering entrance aperture by pressure break hole 9
At hole, to complete pressure break.In the process, in order to increase discharge capacity, fracturing effect is improved, is injecting fracturing fluid into oil pipe 8
While, fracturing fluid can also be injected into annular space 11 to carry out fluid infusion.
After the perforating and fracturing of corresponding stage is completed, 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, thus, reduce working procedure, improve work
Efficiency.
In the application, the orientation term "up" and "down" is using the orientation residing for the tripping in stratum of instrument 100 as reference.
The preferred embodiment of the present invention is the foregoing is only, but the scope of the present invention is not limited thereto, Ren Heben
The technical staff in field easily can be changed or change in technical scope disclosed by the invention, and this change or change
Change should be all included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (10)
- A kind of 1. instrument for pressure stage differential style spray envelope pressure, it is characterised in that including：The top connection of tubular, inside and outside nozzle and pressure break hole, the nozzle position can be connected by being set on the perisporium of the top connection In the upper end in the pressure break hole,The adapter sleeve of the tubular of the lower end of the top connection is arranged on,The center-pole of the tubular of the lower end of the adapter sleeve is arranged on,The packer being arranged on the outer wall of the adapter sleeve and the center-pole, the packer, which has, is arranged on the center Packing element component on the outer wall of bar,The lower contact of the tubular of the lower end of the center-pole is arranged on,The inner cylinder that can be connected within the top connection and with the top connection slidingtype is arranged on, it is in an initial condition, described interior Cylinder blocks the nozzle and the pressure break hole,Wherein, after the closing of the inner chamber of the inner cylinder, 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. instrument according to claim 1, it is characterised in that the packer also includes：Upper end shell type is fixedly connected on the outer barrel on the outer wall of the adapter 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 inwall of the outer barrel and the adapter sleeve,Upper end is arranged on the piston in the piston cylinder, and the lower end of the piston is by downward between the center-pole and the outer barrel Extending and abutted with the packing element component, the piston is connected with the outer barrel slidingtype,The first pressure transmission hole being arranged on the wall of the adapter sleeve,Wherein, the upper end for the upper surface that first pressure transmission hole connects with the piston cylinder and is located at the piston is to cause pressure Liquid can promote the piston to move downward after entering the piston cylinder.
- 3. instrument according to claim 2, it is characterised 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 connect with first pressure transmission hole after the inner cylinder moves down.
- 4. instrument according to claim 3, it is characterised in that first pressure transmission hole includes being used for and second pressure transmission The Part I of hole connection, and the Part II connected with the Part I and the piston cylinder, wherein described first Part is configured to the hole radially extended, and the Part II is configured to the hole axially extended.
- 5. instrument according to claim 4, it is characterised in that be configured with reaming in the porch of the Part I.
- 6. instrument according to claim 2, it is characterised in that set on the lower end outer wall of the inner cylinder radially projecting Spacing ring, cylinder base in cylinder base and second is set on the inwall of the adapter sleeve in first, at the first pressure under the inner cylinder Move, the spacing ring structure for can with described first in cylinder base coordinate, under second pressure, the spacing ring structure is can be with institute State inner cylinder separate and so that the inner cylinder move down and with described second in cylinder base coordinate.
- 7. instrument according to claim 1, it is characterised in that also include the solution block for being arranged on the packer lower end Ring, the upper end of the deblocking baffle ring are socketed on the outer wall of the center-pole and abutted with the packing element component, and lower end passes through the Three shear pins are fixedly connected with the lower contact, and the deblocking baffle ring is formed for described with the center-pole and the lower contact Unseal the first space of baffle ring and lower contact relative movement.
- 8. instrument according to claim 1, it is characterised in that ball seat is configured with the inwall of the inner cylinder, to described In inner cylinder during pitching, the ball seat is configured to coordinate to close the inner chamber of the inner cylinder with the ball.
- 9. instrument according to claim 1, it is characterised in that including multiple instruments being sequentially connected, and by On the direction of top to bottm, the diameter of the ball seat of the inner cylinder of the instrument is sequentially reduced.
- 10. a kind of tubing string, it is characterised in that including the instrument according to any one of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610037416.XA CN105696993B (en) | 2016-01-20 | 2016-01-20 | The instrument 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 |
|---|---|---|---|
| CN201610037416.XA CN105696993B (en) | 2016-01-20 | 2016-01-20 | The instrument of envelope pressure is sprayed for pressure stage differential style and includes its tubing string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105696993A CN105696993A (en) | 2016-06-22 |
| CN105696993B true CN105696993B (en) | 2018-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610037416.XA Active CN105696993B (en) | 2016-01-20 | 2016-01-20 | The instrument 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 |
|---|---|---|---|---|
| CN109973023B (en) * | 2017-12-28 | 2024-11-01 | 中石化石油工程技术服务有限公司 | Telescopic casing pipe setting segmentation tool |
| CN111594094B (en) * | 2020-07-01 | 2020-12-08 | 大庆金祥寓科技有限公司 | Penetrate stifled two-way shut-in well device of joint action |
| CN112576230A (en) * | 2020-12-24 | 2021-03-30 | 华鼎鸿基石油工程技术(北京)有限公司 | Perforation fracturing gun and hydraulic sand blasting perforation bridge plug combined fracturing string |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK1840324T3 (en) * | 2006-03-31 | 2012-11-26 | Schlumberger Technology Bv | Method and apparatus for selectively treating a perforated casing |
| CN101539007B (en) * | 2009-04-15 | 2012-01-04 | 中国石油大学(北京) | Abrasive jetting device and method for abrasive jetting flow and jetting perforation and multiple fracturing |
| CN103821488B (en) * | 2014-03-05 | 2016-05-11 | 中国石油化工股份有限公司 | The fracturing string of stepped setting, perforation and using method thereof |
| CN204098878U (en) * | 2014-07-28 | 2015-01-14 | 中国石油化工股份有限公司 | Device made by a kind of abrasive material perforation sandblasting pressure break connection |
| CN204386551U (en) * | 2014-12-03 | 2015-06-10 | 爱迪斯新技术有限责任公司 | Pilot packer and step by step pilot multiple fracturing device step by step |
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2016
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| CN105696993A (en) | 2016-06-22 |
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