CN105696993A - Tool used for pressure stage differential type spraying-sealing fracturing tool and tubular column comprising same - Google Patents
Tool used for pressure stage differential type spraying-sealing fracturing tool and tubular column comprising same Download PDFInfo
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- CN105696993A CN105696993A CN201610037416.XA CN201610037416A CN105696993A CN 105696993 A CN105696993 A CN 105696993A CN 201610037416 A CN201610037416 A CN 201610037416A CN 105696993 A CN105696993 A CN 105696993A
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- 238000007789 sealing Methods 0.000 title abstract 2
- 230000005540 biological transmission Effects 0.000 claims description 38
- 238000012856 packing Methods 0.000 claims description 31
- 239000007788 liquid Substances 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 11
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000005086 pumping Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002708 enhancing effect 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
- 238000009434 installation Methods 0.000 description 1
- 238000002372 labelling 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 invention provides a tool used for pressure stage differential type spraying-sealing fracturing tool and a tubular column comprising the same. The tool comprises a barrel-shaped upper connector, a connecting sleeve, a central rod, a packer, a lower connector and an inner barrel, wherein the upper connector is provided with nozzles and fracturing holes, and the inner barrel is arranged on the inner wall of the upper connector so as to seal the nozzles and the fracturing holes. Under the action of first pressure, the inner barrel moves downwards to expose the nozzles, the packer is set, and then perforation can be conducted through the nozzles. Under the action of second pressure, the inner barrel continues to move downwards to expose the fracturing holes so that fracturing operation can be carried out. The operation cost can be lowered through the tool.
Description
Technical field
The present invention relates to the technical field such as hydrocarbon well completions and reservoir reconstruction, be specifically related to a kind of instrument for pressure stage differential spray envelope pressure and the tubing string comprising it。
Background technology
Along with unconventionaloil pool hides the propelling of exploration and development, the Main Yield-increasing measure that completion staged fracturing technology is exploited as unconventional petroleum resources also develops rapidly。Reservoir can be transformed by completion staged fracturing technology targetedly, expands the drainage area of layer of oil gas production, improves the rate of oil and gas recovery。
In prior art, after multistage subsection reservoir reconstruction generally adopts first perforation, the method for pressure break carries out。It is, in reservoir reconstruction process, first descend entrance aperture rifle to carry out multistage subsection perforation, to form hole in reservoir。Then, stratum is proposed perforating gun。Then, then under enter there is the tubing string of packer, and make packer setting by the mode of pitching。Again, opened the first order sliding sleeve of packer by the mode of pitching, to expose the first order pressure break hole coordinated with hole。Finally, injecting fracturing fluid in tubing string, fracturing fluid is entered in hole by pressure break hole, and forms crack in stratum。After pressure break completes, the ball of the one-level that again has high input is opened upper level sliding sleeve and last layer stratum is carried out pressure break。
Pass through said method, although the transformation to reservoir can be completed, however it is necessary that down that repeatedly tubing string just can complete perforation and sand fracturing。Thus, not only increase flow chart by said method, improve operating cost, and reduce accuracy and the accuracy of pressure break。
Summary of the invention
Some or all of for above-mentioned technical problem existing in prior art, the present invention proposes a kind of instrument for pressure stage differential spray envelope pressure and the tubing string comprising it。Use this to be used for the instrument of pressure stage differential spray envelope pressure, it is only necessary under enter a tubing string and just can realize perforation and pressure break。Thus, this instrument being used for pressure stage differential spray envelope pressure can reduce flow chart, reduces operating cost, improves accuracy and the precision of pressure break simultaneously。
According to an aspect of the invention, it is proposed that a kind of instrument for pressure stage differential spray envelope pressure, including:
The top connection of tubular, arranges on the perisporium of top connection and can connect inside and outside nozzle and pressure break hole, and nozzle is positioned at the upper end in pressure break hole,
It is arranged on the adapter sleeve of the tubular of the lower end of top connection,
It is arranged on the center-pole of the tubular of the lower end of adapter sleeve,
Being arranged on the packer on the outer wall of adapter sleeve and center-pole, packer has the packing element assembly on the outer wall of centrally disposed bar,
The lower contact of the tubular of the lower end of centrally disposed bar,
Being arranged within top connection and the inner core being connected with top connection slidingtype, in an initial condition, inner core blocks nozzle and pressure break hole,
Wherein, after the inner chamber of inner core is closed, under the first pressure effect, inner core moves down and exposes nozzle, and meanwhile, packer setting, under the second pressure effect, inner core moves down and exposes pressure break hole。
In one embodiment, packer also includes:
Upper end shell type is fixedly connected on the urceolus on the outer wall of adapter sleeve, and the lower end of urceolus extended center-pole,
The piston cylinder formed by the upper surface of center-pole, the inwall of urceolus and adapter sleeve,
Upper end is arranged on the piston in piston cylinder, and the lower end of piston is by downwardly extending between center-pole with urceolus and abutting with packing element assembly, and piston is connected with urceolus slidingtype,
It is arranged on the first pressure transmission hole on the wall of adapter sleeve,
Wherein, the upper end of the upper surface that the first pressure transmission hole connects with piston cylinder and is positioned at piston can promote piston to move downward so that pressure liquid enters after piston cylinder。
In one embodiment, arranging the second pressure transmission hole on the wall of inner core, the second pressure transmission hole is configured to after inner core moves down to connect with the first pressure transmission hole。
In one embodiment, first pressure transmission hole includes the Part I for connecting with the second pressure transmission hole, and the Part II all connected with Part I and piston cylinder, wherein Part I is configured to the hole that radially extends, and Part II is configured to the hole that axially extends。
In one embodiment, it is configured with reaming in the porch of Part I。
In one embodiment, the lower end outer wall of inner core arranges radially projecting spacing ring, the inwall of adapter sleeve arranges in first cylinder base in cylinder base and second, inner core moves down at the first pressure, spacing ring structure is can coordinate with cylinder base in first, under the second pressure, spacing ring structure is for separating with inner core and make inner core move down and coordinate with cylinder base in second。
In one embodiment, also include the deblocking baffle ring being arranged on packer lower end, the upper end of deblocking baffle ring is socketed on the outer wall of center-pole and abuts with packing element assembly, lower end is connected by the 3rd shear pin and lower contact are fixing, and deblocking baffle ring forms the first space for deblocking baffle ring and lower contact relative movement with center-pole and lower contact。
In one embodiment, the inwall of inner core being configured with ball seat, when to pitching in inner core, ball seat is configured to coordinate with ball to close the inner chamber of inner core。
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 instrument being sequentially connected with, and on direction from top to bottom, the diameter of the ball seat of the inner core of instrument is sequentially reduced。
Compared with prior art, it is an advantage of the current invention that, tubing string at the instrument by having this structure is lowered in reservoir, and after the inner chamber of inner core is closed, injection pressure liquid in tubing string, when pressure reaches the first pressure, inner core moves relative to top connection and exposes nozzle, and actuates packing element component operational and make packer setting。Thus, load fluid can produce high-speed jet by nozzle and enter stratum, to complete reservoir perforation。After reservoir perforation completes, again to injection pressure liquid in tubing string, when pressure reaches the second pressure, inner core moves relative to top connection and exposes pressure break hole, then can inject fracturing fluid in tubing string, to complete huge discharge pressure break。Thus, use this to be used for the instrument of pressure stage differential spray envelope pressure, it is only necessary under enter a tubing string and just can realize perforation and pressure break。Thus, this instrument being used for pressure stage differential spray envelope pressure can reduce flow chart, reduces operating cost。
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, in the drawings:
Fig. 1 shows the instrument for pressure stage differential spray envelope pressure being under original state according to an embodiment of the invention；
Fig. 2 shows the instrument for pressure stage differential spray envelope pressure after putting into ball according to an embodiment of the invention；
Fig. 3 shows the instrument for pressure stage differential spray envelope pressure after exposing nozzle according to an embodiment of the invention；
Fig. 4 shows the instrument for pressure stage differential spray envelope pressure after exposing pressure break hole according to an embodiment of the invention
Fig. 5 shows tubing string according to an embodiment of the invention；
In the accompanying drawings, identical parts use identical accompanying drawing labelling, and accompanying drawing is not drawn according to actual ratio。
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described。
Fig. 1 shows the instrument 100 for pressure stage differential spray envelope pressure under original state according to an embodiment of the invention。As it is shown in figure 1, instrument 100 includes the top connection 1 of tubular, adapter sleeve 2, center-pole 3, packer 4, lower contact 5 and inner core 6。Wherein, top connection 1 is configured to tubular, and for being connected with oil pipe 8, so that instrument 100 is sent in reservoir。Meanwhile, the perisporium of top connection 1 arranges the inside and outside nozzle 7 of connection and pressure break hole 9, and nozzle 7 is positioned at the upper end in pressure break hole 9。Adapter sleeve 2 is arranged on the lower end of top connection 1, and is in a cylindrical shape。Center-pole 3 is arranged on the lower end of adapter sleeve 2, and is in a cylindrical shape。Packer 4 is arranged on the lower end outer wall of adapter sleeve 2, and extends on the outer wall of center-pole 3, for the annular space 11 between isolating tool 100 and sleeve pipe 10。Further, packer 4 has the packing element assembly 12 on the outer wall of centrally disposed bar 3, and under the effect of pressure liquid, the running of packing element assembly 12 makes packer 4 set。The lower end of the centrally disposed bar 3 of lower contact 5, and it is configured to tubular。Inner core 6 is arranged within top connection 1, and is connected with top connection 1 slidingtype。Under original state, inner core 6 blocks nozzle 7 and pressure break hole 9, as shown in Figure 1。At the first pressure, inner core 6 moves down and exposes nozzle 7, as shown in Figure 3。Under the second pressure, inner core 6 continues to move down, and exposes pressure break hole 9, as shown in Figure 4。
Thus, after the tubing string 50 of the instrument 100 by having this structure is lowered into reservoir, and the inner chamber of inner core 6 is closed, then to injection pressure liquid in tubing string 50, under the first pressure effect, nozzle 7 exposes, as shown in Figure 3。Thus, load fluid can be injected in tubing string 50, load fluid can be produced high-speed jet by nozzle 7 and be entered stratum, to complete reservoir perforation。After reservoir perforation completes, continuing to pumping pressure liquid in tubing string 50, when pressure arrives the second pressure, pressure break hole 9 is exposed, and as shown in Figure 4, now can carry out pressure break operation。Thus, use this to be used for the instrument 100 of pressure stage differential spray envelope pressure, it is only necessary under enter a tubing string 50 and just can realize perforation and pressure break。Thus, this instrument 100 being used for pressure stage differential spray envelope pressure can reduce flow chart, reduces operating cost。Meanwhile, in transformation reservoir process, just carrying out pressure break in adjacent locations after completing due to perforation, thus this instrument 100 can guarantee that accuracy and the precision of pressure break, thus improve fracturing effect。It addition, in transformation stratum process, just can realize packer 4 set and perforation and fracturing operation thereof by once blocking inner core 6, create a further reduction the engineering time, decrease operating expenses。
According to the present invention, packer 4 also includes urceolus 16, piston cylinder 13, piston 14 and the first pressure transmission hole 15。Wherein, the upper end shell type of urceolus 16 is fixedly connected on the outer wall of adapter sleeve 2, and urceolus 16 extends axially downward and cross center-pole 3。Thus, the upper surface of center-pole 3, the inwall of urceolus 16 and adapter sleeve 2 define piston cylinder 13。The upper end of piston 14 is arranged in piston cylinder 13, and the lower end of piston 14 is by downwardly extending between center-pole 3 with urceolus 16 and abutting with packing element assembly 12。Meanwhile, in an initial condition, piston 14 is connected by the second shear pin 17 with urceolus 16。And the first pressure transmission hole 15 can connect with piston cylinder 13, with by the first pressure transmission hole 15 to injection pressure liquid in piston cylinder 13。It addition, the first pressure transmission hole 15 is positioned at the lower end in pressure break hole 9 and is positioned at the upper end of upper surface of piston 14, so that piston 14 can accept the pressure liquid from the first pressure transmission hole 15。Accordingly, the wall of inner core 6 arranges the second pressure transmission hole 53。In an initial condition, the first pressure transmission hole 15 is closed by inner core 6。When injection pressure liquid and pressure reach the first pressure, inner core 6 can move down and the second pressure transmission hole 53 is connected with the first pressure transmission hole 15。Meanwhile, pressure liquid is entered piston cylinder 13 by the second pressure transmission hole 53 and the first pressure transmission hole 15 and is promoted piston 14, under pressure, second shear pin 17 is cut off, and piston 14 is moved down, the piston 14 moved down promotes packing element assembly 12, so that packing element assembly 12 acts on and insulates annular space 11。
It should be noted that, after inner core 6 moves down and puts in place, the second pressure transmission hole 53 can the connection of relative contact with the first pressure transmission hole 15。Certainly, the second pressure transmission hole 53 can also be connected by formation gap between adapter sleeve 2 and inner core 6 with the first pressure transmission hole 15。In the latter case, it is possible to the axial dimension of relatively reduced inner core 6, thus improving the intensity of inner core 6, reduce production cost。
Preferably, the first pressure transmission hole 15 can comprise Part I 15 ' and the Part II 15 connected with Part I 15 ' "。Wherein, Part I 15 ' radially extends and connects for the second pressure transmission hole 53, and Part II 15 " axially extending all connect with Part I 15 ' and piston cylinder 13, for providing normal pressure for piston 14, more effectively actuation piston 14 moves。It is further preferred that the porch of Part I 15 ' (namely needing and the second pressure transmission hole 53 connectivity part) is configured to enlarging form, better to accept the pressure liquid of the second pressure transmission hole 53 supply。The second pressure transmission hole 53 can be made more easily to accept pressure liquid by this set, reduce the required precision of instrument 100 simultaneously。
In order to ensure the safety of packing, packing element assembly 12 includes multiple packing element 26, and arranges spacer ring 27 between adjacent packing element 26。Such as, packing element assembly 12 includes three packing elements。By this arrangement enhancing the packing effect of packer 4, thus ensure that the perforation of instrument 100 and pressure break efficiency。
So that packing element 26 uniform force, push rod 29 is set between piston 14 and packing element assembly 12, to transmit the power of piston 14 to packing element assembly 12。The upper end of push rod 29 is fixing with piston 14 to be connected, and lower end is connected with center-pole 3 slidingtype, and lower surface abuts with packing element 26。
In order to prevent packing element assembly 12 rollback, the outer wall of center-pole 3 arranges the first ratchet 18。Meanwhile, the inwall of piston 14 arranges the second ratchet 19。Moving down in process at piston 14, the second ratchet 19 also moves down therewith, and after treating that piston 14 moves into place and expands so that packing element 26 and insulate annular space 11, the second ratchet 19 coordinates with the first ratchet 18, to prevent packing element 26 rollback。Safety is set, thus ensureing follow-up perforation and fracturing operation by what this set can guarantee that packer 4。
According to the present invention, the inwall of adapter sleeve 2 is arranged in first cylinder base 54 in cylinder base 28 and second。Wherein, the lower end that cylinder base 54 is arranged in first cylinder base 28 in second。And in cylinder base 28 and second, cylinder base 54 is all configured to step-like in first。Accordingly, the lower end outer wall of inner core 6 arranges spacing ring 55。Spacing ring 55 is configured to by the ring-type projected radially outwardly of inner core 6。In an initial condition, spacing ring 55 is connected on inner core 6 by the 4th shear pin 56。It addition, inner core 6 is set on adapter sleeve 2 by the first shear pin 20。After the inner chamber of inner core 6 is closed, when pressure reaches the first pressure, the first shear pin 20 is cut off, inner core 6 drive spacing ring 55 to move down so that spacing ring 55 can with first in cylinder base 28 compound, thus limiting the position of inner core 6。When pressure reaches the second pressure, the 4th shear pin 56 is cut off, inner core 6 continue to move down and with second in cylinder base 54 compound, to limit the position of inner core 6。By said structure, what can guarantee that inner core 6 is in different positions, thus ensureing the precision of perforation and pressure break。Further, said structure is simple, it is only necessary to blocks an inner core 6 and inner core 6 just can be made to move and be in different positions, easy to operate。
In a preferred embodiment, the inwall of inner core 6 is configured with ball seat 21。After instrument is entered stratum 100 times, ground can be passed through to pitching 22 in inner core 6, as shown in Figure 2。Ball 22 coordinates with ball seat 21, has reached the purpose of the inner chamber closing inner core 6。Now, can move to pumping pressure liquid in instrument 100 to actuate inner core 6。
In a preferred embodiment, instrument 100 also includes the deblocking baffle ring 23 that is arranged on packer 4 lower end。The upper end of deblocking baffle ring 23 is socketed on the outer wall of center-pole 3, and is connected with center-pole 3 slidingtype。The upper surface of deblocking baffle ring 23 abuts with packing element 26, and lower end is connected by the 3rd shear pin 24 is fixing with lower contact 5。Meanwhile, deblocking baffle ring 23 forms the first space 25 with center-pole 3 and lower contact 5, dodges space to provide。When needs deblocking packer 4, it is possible to lift up top connection 1, center-pole 3 and lower contact 5 and have and follow the trend that top connection 1 moves upward, due to packing element 26 and annular space 11 frictional contact, then the 3rd shear pin 24 is cut off under a stretching force。After the 3rd shear pin 24 is cut off, deblocking baffle ring 23 and lower contact 5 relative movement are so that packing element 26 resilience is thus deblocking packer 4。The operational security of instrument 100 can be improved by this set, under emergency case, tubing string 50 is proposed by sleeve 10。
The invention still further relates to a kind of tubing string 50。Tubing string 50 includes oil pipe 8 and the instrument 100 that be connected fixing with oil pipe 8, as shown in Figure 4。In order to improve reservoir reconstruction scale, improve work efficiency。Multiple instrument 100 being sequentially connected with can be set on one-trip string 50。And in order to realize the closure of inner core 6, on direction from top to bottom, the diameter of the ball seat 21 of the different inner core 6 of instrument 100 is sequentially reduced。Thus, after tubing string 50 is lowered in stratum, can pass through to put into the ball 22 of different-diameter, actuate inner core 6 step by step and move, to carry out perforation and pressure break step by step。Especially to, in the process carrying out perforation and pressure break when level, setting owing to the packer 4 on target zone is not actuated, target zone and following packer 4 achieve and set。Thus, the instrument face-pumping over the ground with this structure send equipment requirements low, it is, when ground installation is constant, operation discharge capacity can be realized higher, and the better purpose of fracturing effect。
The method that use the tubing string 50 with instrument 100 carry out transformation stratum is discussed in detail below according to Fig. 1-5。
The first step, is lowered into the tubing string 50 comprising oil pipe 8 and instrument 100 in sleeve pipe 10, and makes formation annular space 11 between tubing string 50 and sleeve pipe 10。
Second step, puts into ball 22 in oil pipe 8。Ball 22 coordinates with the ball seat 21 of the inner core 6 of corresponding stage, to block the internal channel of inner core 6。
3rd step, pumping pressure liquid in oil pipe 8。When pressure reaches the first pressure (such as the first pressure is 15-25MPa), first shear pin 20 is cut off, then inner core 6 moves down together with spacing ring 55, and spacing ring 55 is coordinated with cylinder base in first 28, so that nozzle 7 exposes, the second pressure transmission hole 53 connects with the first pressure transmission hole 15 simultaneously。Now, pressure liquid is flowed into the first pressure transmission hole 15 entered eventually in piston cylinder 13 by the second pressure transmission hole 53, and promotes piston 14 to move downward so that push rod 29 acts on packing element 26, and thus packing element 26 expands to realize packer 4 and sets。
4th step, after packer 4 sets, injects load fluid in oil pipe 8, and load fluid is outwards injection at a high speed by the throttling action of nozzle 7, and load fluid is shot through sleeve pipe 10 and enters stratum, thus forming hole in stratum。
5th step, after perforation terminates, injection pressure liquid in oil pipe 8, due to coordinating of ball 22 and ball seat 21, so that inner core 6 is forced downwards。When pressure reaches the second pressure (such as, the second pressure is 35-45MPa), the 4th shear pin 56 is cut off, and inner core 6 continues to move down and coordinate with cylinder base in second 54, thus exposing pressure break hole 9。
6th step, injects fracturing fluid in oil pipe 8, and fracturing fluid forms hole place in the earth formation when entering perforation by pressure break hole 9, to complete pressure break。In the process, in order to increase discharge capacity, improve fracturing effect, of the fracturing fluid at the same time it can also be to injecting fracturing fluid in annular space 11 to carry out fluid infusion injecting in oil pipe 8。
After completing the perforating and fracturing of corresponding stage, repeat second step to the 6th step, to complete the perforating and fracturing of next stage。Thus, multi-stage perforator and the pressure break of reservoir can be completed by one-trip string 50, thus, decrease working procedure, improve work efficiency。
In the application, described orientation term "up" and "down" is all with orientation that instrument enters residing for stratum for 100 times for reference。
The foregoing is only the preferred embodiment of the present invention; but scope is not limited thereto; any those skilled in the art, in technical scope disclosed by the invention, can easily be changed or change, and this change or change all should be encompassed within protection scope of the present invention。Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims。
Claims (10)
1. the instrument for pressure stage differential spray envelope pressure, it is characterised in that including:
The top connection of tubular, arranges on the perisporium of described top connection and can connect inside and outside nozzle and pressure break hole, and described nozzle is positioned at the upper end in described pressure break hole,
It is arranged on the adapter sleeve of the tubular of the lower end of described top connection,
It is arranged on the center-pole of the tubular of the lower end of described adapter sleeve,
Being arranged on the packer on the outer wall of described adapter sleeve and described center-pole, described packer has the packing element assembly on the outer wall being arranged on described center-pole,
It is arranged on the lower contact of the tubular of the lower end of described center-pole,
Being arranged within described top connection and the inner core being connected with described top connection slidingtype, in an initial condition, described inner core blocks described nozzle and described pressure break hole,
Wherein, after the inner chamber of described inner core is closed, under the first pressure effect, described inner core moves down and exposes described nozzle, and meanwhile, described packer setting, under described second pressure effect, described inner core moves down and exposes described pressure break hole。
2. instrument according to claim 1, it is characterised in that described packer also includes:
Upper end shell type is fixedly connected on the urceolus on the outer wall of described adapter sleeve, and the lower end of described urceolus extended described center-pole,
The piston cylinder formed by the upper surface of described center-pole, the inwall of described urceolus and described adapter sleeve,
Upper end is arranged on the piston in described piston cylinder, and the lower end of described piston is by downwardly extending between described center-pole with described urceolus and abutting with described packing element assembly, and described piston is connected with described urceolus slidingtype,
It is arranged on the first pressure transmission hole on the wall of described adapter sleeve,
Wherein, the upper end of the upper surface that described first pressure transmission hole connects with described piston cylinder and is positioned at described piston can promote described piston to move downward so that pressure liquid enters after described piston cylinder。
3. instrument according to claim 2, it is characterised in that arrange the second pressure transmission hole on the wall of described inner core, described second pressure transmission hole is configured to after described inner core moves down to connect with described first pressure transmission hole。
4. instrument according to claim 3, it is characterized in that, described first pressure transmission hole includes the Part I for connecting with described second pressure transmission hole, and the Part II all connected with described Part I and described piston cylinder, wherein said Part I is configured to the hole radially extended, and described Part II is configured to the hole that axially extends。
5. instrument according to claim 4, it is characterised in that be configured with reaming in the porch of described Part I。
6. instrument according to claim 2, it is characterized in that, the lower end outer wall of described inner core arranges radially projecting spacing ring, the inwall of described adapter sleeve arranges in first cylinder base in cylinder base and second, described inner core moves down at the first pressure, described spacing ring structure is can coordinate with cylinder base in described first, and under the second pressure, described spacing ring structure coordinates with cylinder base in described second for separating and make described inner core to move down with described inner core。
7. instrument according to claim 1, it is characterized in that, also include the deblocking baffle ring being arranged on described packer lower end, the upper end of described deblocking baffle ring is socketed on the outer wall of described center-pole and abuts with described packing element assembly, lower end is connected by the 3rd shear pin and described lower contact are fixing, and described deblocking baffle ring forms the first space for described deblocking baffle ring and described lower contact relative movement with described center-pole and described lower contact。
8. instrument according to claim 1, it is characterised in that be configured with ball seat on the inwall of described inner core, when to pitching in described inner core, described ball seat is configured to coordinate to close the inner chamber of described inner core with described ball。
9. a tubing string, it is characterised in that include the instrument according to any one of claim 1 to 8。
10. instrument according to claim 1, it is characterised in that include multiple described instrument being sequentially connected with, and on direction from top to bottom, the diameter of the ball seat of the described inner core of described instrument is sequentially reduced。
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 true CN105696993A (en) | 2016-06-22 |
| CN105696993B CN105696993B (en) | 2018-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105696993B (en) |
Cited By (3)
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| CN109973023A (en) * | 2017-12-28 | 2019-07-05 | 中石化石油工程技术服务有限公司 | A kind of telescopic setting of casing segmentation tool |
| CN111594094A (en) * | 2020-07-01 | 2020-08-28 | 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973023A (en) * | 2017-12-28 | 2019-07-05 | 中石化石油工程技术服务有限公司 | A kind of telescopic setting of casing segmentation tool |
| CN111594094A (en) * | 2020-07-01 | 2020-08-28 | 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 |
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|---|---|
| CN105696993B (en) | 2018-02-09 |
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