CN105696983A - Tool used for spraying-sealing fracturing and tubular column comprising same - Google Patents
Tool used for spraying-sealing fracturing and tubular column comprising same Download PDFInfo
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- CN105696983A CN105696983A CN201610037424.4A CN201610037424A CN105696983A CN 105696983 A CN105696983 A CN 105696983A CN 201610037424 A CN201610037424 A CN 201610037424A CN 105696983 A CN105696983 A CN 105696983A
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- 238000007789 sealing Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims description 47
- 238000012856 packing Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 16
- 230000000694 effects Effects 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 description 17
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 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
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003292 glue Substances 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
- 238000002372 labelling Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 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
- E21B43/11—Perforators; Permeators
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
-
- 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
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- 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)
- Working Measures On Existing Buildindgs (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a tool used for spraying-sealing fracturing and a tubular column comprising the same. The tool comprises a barrel-shaped upper connector, a nozzle sleeve, a central rod, a packer, a lower connector, a first inner barrel arranged in the upper connector and a second barrel arranged in the nozzle sleeve, wherein the upper connector is provided with fracturing holes, and the nozzle sleeve is provided with nozzles. In an initial state, the fracturing holes are sealed by the first inner barrel, and the nozzles are blocked by the second inner barrel. After an inner cavity of the second inner barrel is sealed, pressure liquid is pumped into the tool, when first pressure is reached, the second inner barrel moves downwards to expose the nozzles, the packer is set, and at the moment, perforation can be conducted. After perforation is completed, pressure liquid is injected into an annulus, when second pressure is reached, the first inner barrel moves downwards to expose the fracturing holes, and fracturing operation can be conducted at the moment. By means of the tool, work efficiency can be improved, and the operation cost is lowered.
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 spraying 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 spraying envelope pressure and the tubing string comprising it。Use this to be used for spraying the instrument of 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 spraying 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 spraying envelope pressure, including:
The top connection of tubular, the outer wall of top connection arranges the pressure break hole that connection is inside and outside,
It is arranged on the nozzle cage of the tubular of the lower end of top connection, nozzle cage arranges the nozzle that connection is inside and outside,
It is arranged on the center-pole of the tubular of the lower end of nozzle cage,
Being arranged on the packer on the outer wall of nozzle cage and center-pole, packer has packing element assembly,
The lower contact of the tubular of the lower end of centrally disposed bar,
The first inner core being arranged on the inwall of top connection and can be connected with top connection slidingtype, in an initial condition, the first inner core closure pressure break hole,
The second inner core being arranged on the inwall of nozzle cage and can be connected with nozzle cage slidingtype, in an initial condition, the second inner core closure nozzle,
Wherein, after the inner chamber of the second inner core is closed, under the first pressure effect, second inner core is configured to relative nozzle set and moves and expose nozzle, and meanwhile, packing element assembly is configured to be deformed so that packer setting under pressure liquid effect, for completing perforating application, under the second pressure effect, the second inner core is configured to move relative to top connection and expose pressure break hole, has been used for fracturing operation。
In one embodiment, packer also includes:
Upper end shell type is fixedly connected on the urceolus on the outer wall of nozzle cage, 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 nozzle cage,
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,
Being arranged on the first pressure transmission hole on the outer wall of nozzle cage, the first pressure transmission hole connects with cylinder。
In one embodiment, arranging the 4th pressure transmission hole on the wall of the second inner core, the 4th pressure transmission hole is configured to after the second 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 4th 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, also include selectivity and be arranged in the second inner core and for closing the opener of the inner chamber of the second inner core, opener includes:
Opener main body,
By the upwardly extending elastic card of opener main body,
It is arranged on the ball seat of opener main body lower end,
The ball coordinated with ball seat,
Wherein, elastic card is provided with lobe with the fit depressions on the inwall being arranged on the second inner core。
In one embodiment, in the lower end of the groove of the second inner core, a grade ring is set, shelves ring is configured to slide axially relative to the second inner core, and arranges sealing member between the upper surface of shelves ring and the second inner core so that shelves ring compressive seal in the process that moves up relative to the second inner core。
In one embodiment, elastic boosting ring is set between opener main body and ball seat。
In one embodiment, also include the deblocking shelves ring being arranged on packer lower end, the upper end of deblocking shelves ring is socketed on the outer wall of center-pole, lower end is connected by the 3rd shear pin and lower contact are fixing, and deblocking shelves ring forms the first space for deblocking shelves ring and lower contact relative movement with center-pole and lower contact。
According to another aspect of the invention, it is proposed that a kind of tubing string, it includes above-mentioned instrument。
Compared with prior art, it is an advantage of the current invention that, tubing string at the instrument by having this structure is lowered into reservoir, and the inner chamber of the second inner core is closed, injection pressure liquid in tubing string, when pressure reaches the first pressure time, the second inner core relative nozzle set is mobile and exposes nozzle, meanwhile, packer setting。Thus, load fluid can produce high-speed jet by nozzle and enter stratum, to complete reservoir perforation。After reservoir perforation completes, continuing to pumping pressure liquid in annular space, when pressure reaches the second pressure, the first inner core moves down 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 spraying the instrument of 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 spraying envelope pressure can reduce flow chart, reduces operating cost。Meanwhile, in transformation reservoir process, just carrying out pressure break at opposite position after completing due to perforation, thereby ensuring that accuracy and the precision of pressure break, thus improve fracturing effect。
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 spraying envelope pressure under original state according to an embodiment of the invention；
Fig. 2 shows the instrument for spraying envelope pressure putting under opener state according to an embodiment of the invention；
Fig. 3 shows the instrument for spraying envelope pressure under the second inner core according to an embodiment of the invention under shifting state；
Fig. 4 shows the instrument for spraying envelope pressure under the first inner core according to an embodiment of the invention under shifting state；
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 spraying 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, nozzle cage 2, center-pole 3, packer 4, lower contact the 5, first inner core 60 and the second inner core 6。Wherein, top connection 1 is configured to tubular, and for being connected with oil pipe 8, to be sent in reservoir by instrument 100, and arranges the pressure break hole 9 that connection is inside and outside on the outer wall of top connection 1。Nozzle cage 2 is arranged on the lower end of top connection 1, and is configured to tubular。Meanwhile, the perisporium of nozzle cage 2 arranges the nozzle 7 that connection is inside and outside。Center-pole 3 is arranged on the lower end of nozzle cage 2, and is in a cylindrical shape。Packer 4 is arranged on the lower end outer wall of nozzle cage 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 being socketed in center-pole 3。The lower end of the centrally disposed bar 3 of lower contact 5, and it is configured to tubular。First inner core 60 is arranged on the inwall of top connection 1, and is connected with top connection 1 slidingtype。In an initial condition, the first inner core 60 is used for blocking pressure break hole 9, and under the second pressure effect, the first inner core 60 can move down relative to top connection 1, and exposes pressure break hole 9。Second inner core 6 is connected with nozzle cage 2 slidingtype to ensure closure nozzle 7, and under the first pressure effect, the second inner core 6 moves down to expose nozzle 7。
Thus, after the tubing string 50 of the instrument 100 by having this structure is lowered into reservoir, and the inner chamber of the second inner core 6 is closed, again to injection pressure liquid in tubing string 50, when pressure reaches the first pressure, the second inner core 6 relative nozzle set 2 moves and exposes nozzle 7, as shown in Figure 3。Meanwhile, actuate that packing element assembly 12 operates and packer 4 sets。Thus, then to the second inner core 6 inject load fluid time, load fluid can be produced high-speed jet by nozzle 7 and be entered stratum, to complete reservoir perforation。After reservoir perforation completes, as shown in Figure 4, by injection pressure liquid, when pressure reaches the second pressure so that the first inner core 60 moves down and exposes pressure break hole 9, then now can inject fracturing fluid in tubing string 50, to complete huge discharge pressure break。Thus, use this to be used for spraying the instrument 100 of 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 spraying envelope pressure can reduce flow chart, reduces operating cost。Meanwhile, in transformation reservoir process, just carrying out pressure break at opposite position after completing due to perforation, thus this instrument 100 can guarantee that accuracy and the precision of pressure break, thus improve fracturing effect。
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 nozzle cage 2, and urceolus 16 downwardly extends and cross center-pole 3。Thus, the upper surface of center-pole 3, the inwall of urceolus 16 and nozzle cage 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, piston 14 is connected by the second shear pin 17 with urceolus 16。First pressure transmission hole 15 is arranged on the outer wall of nozzle cage 2。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 of nozzle 7 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 the second inner core 6 arranges the 4th pressure transmission hole 53。In an initial condition, the first pressure transmission hole 15 is closed by the second inner core 6。In injection pressure liquid process, the second inner core 6 can move down and the 4th pressure transmission hole 53 is connected with the first pressure transmission hole 15。Thus, pressure liquid is entered piston cylinder 13 by the inner chamber of the second inner core 6 via the 4th pressure transmission hole 53 and the first pressure transmission hole 15 and promotes 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 the second inner core 6 moves down and puts in place, the 4th pressure transmission hole 53 can the connection of relative contact with the first pressure transmission hole 15。Certainly, the 4th pressure transmission hole 53 can also be connected by formation gap between nozzle cage 2 and the second inner core 6 with the first pressure transmission hole 15。In the latter case, it is possible to the axial dimension of relatively reduced second inner core 6, thus improving the intensity of the second 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 4th 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 4th pressure transmission hole 53 connectivity part) is configured to enlarging form, better to accept the pressure liquid of the 4th pressure transmission hole 53 supply。The first pressure transmission hole 15 can be made more easily to accept pressure liquid by this set, reduce the required precision of instrument 100 simultaneously。
For the ease of processing with install, nozzle cage 2 is it is so structured that split-type structural。Such as, as it is shown in figure 1, nozzle cage 2 is configured to first jet body 2 ' and second nozzle body 2 "。Wherein, second nozzle body 2 " it is arranged on the lower end of first jet body 2 ', and fixing with first jet body 2 ' be connected。Further, nozzle 7 can be arranged on the outer wall of first jet body 2 '。And packer 4 and second nozzle body 2 " be connected, and the first pressure transmission hole 15 is arranged on second nozzle body 2 " wall on。
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 assembly 12 rollback。Safety is set, thus ensureing follow-up perforation and fracturing operation by what this set can guarantee that packer 4。
In like manner, the inwall of nozzle cage 2 arranges the 3rd ratchet 71。Accordingly, the outer wall of the first inner core 60 is arranged the 4th ratchet 72 that can match with described 3rd ratchet 71。By this set when the first inner core 60 is after moving down and exposing pressure break hole 9, the 3rd ratchet 71 coordinates with the 4th ratchet 72, to prevent the first inner core 60 rollback。
Additionally, it is preferred that, after the first inner core 60 moves down, the first inner core 60 can extend nozzle 7 in the length of axial direction, thus playing the effect of closure nozzle 7。It is, after perforation completes, it is possible to block nozzle 7 by the first inner core 60, to ensure that fracturing fluid is entirely through pressure break hole 9 and discharges, thus avoid the pressure loss, improve pressure break efficiency。
According to the present invention, the second inner core 6 and second nozzle body 2 " it is connected by the first shear pin 20。Thus, the inner chamber of closure the second inner core 6 and to it in injection pressure liquid process, when increasing to the first pressure along with pressure, the first shear pin 20 is cut off, so that the second inner core 6 moves down and exposes nozzle 7, and the 4th pressure transmission hole 53 is connected with the first pressure transmission hole 15。This simple in construction, it is easy to accomplish。
According to the present invention, in an initial condition, the first inner core 60 is fixed in top connection 1 by the 4th shear pin 56, for closure pressure break hole 9 in an initial condition。The inwall of top connection 1 arranges first step 61, and second step 62 is set on the outer wall of the first inner core 60。First step 61 and second step 62 relative type motor are configured so that top connection 1 and the first inner core 60 forms pressure chamber 63。Meanwhile, the wall of top connection 1 arranging the 3rd pressure transmission hole 64 and connects for pressure chamber 63, so that annular space 11 can be passed through to injection pressure liquid in pressure chamber 63, moving down thus actuating the first inner core 60。Specifically, after perforation completes, packer 4 is in when setting, injection pressure liquid in annular space 11, and pressure liquid enters pressure chamber 63 by the 3rd pressure transmission hole 64。Under pressure, the 4th shear pin 56 is cut off, thus promoting the first inner core 60 to move down and expose pressure break hole 9。Meanwhile, the first inner core 60 moved down blocks nozzle 7, thus, when carrying out pressure operation, can guarantee that fracturing effect。
In one embodiment, as in figure 2 it is shown, instrument 100 also includes selectivity is arranged in the second inner core 6 and for closing the opener 40 of the inner chamber of the second inner core 6。Opener 40 includes opener main body 41, elastic card 42, ball seat 21 and ball 22。Wherein opener main body 41 is configured to tubular, for being arranged in the second inner core 6。Elastic card 42 is arranged on the upper end of opener main body 41。Preferably, elastic card 42 can be multiple, and is circumferentially distributed。Ball seat 21 is arranged on the lower end of opener main body 41 for placing ball 22。Elastic card 42 is provided with protruding 43。Accordingly, the second inner core 6 is provided with groove 44 (shown in Fig. 1) to coordinate for protruding 43。In opener 40 puts into the second inner core 6 process, after opener 40 runs into the second matched inner core 6, elastic card 42 is flared out, so that protruding 43 coordinate with groove 44, thus opener 40 is positioned on the second inner core 6。In this case, the internal circulation path of the second inner core 6 is blocked, then now can actuate the second inner core 6 by the mode of injection pressure liquid and move down。By coordinating of the opener 40 of this structure and the second inner core 6, just can realize moving down of the second inner core 6, it is to avoid adopt the stuff to make the second inner core 6 move down and produce can not full-bore and the limited problem of progression。It is, by the full-bore that this arrangement achieve that tubing string 50, and then realize " countless " level pressing crack construction。
According to the present invention, as it is shown in figure 1, arrange cylinder base 28 in first on the inwall of nozzle cage 2, for the lower pan position limiting the second inner core 6。Cylinder base 28 in first is it is so structured that ladder platform structure。Specifically, according to the present invention, on direction from top to bottom, the 4th step 45 is set on the lower end inner wall of the groove 44 of the second inner core 6。Meanwhile, the lower end inner wall of the second inner core 6 arranges locating part 47。Locating part 47 is configured to tubular and fixing with the second inner core 6 is connected, and forms the 5th step 46 radially-inwardly highlighted。Accordingly, grade ring 48 is set in the lower end of groove 44, and shelves ring 48 is configured to tubular。Further, the axially intermediate portion of the outer wall of shelves ring 48 is arranged the prominent ring 49 projected radially outwardly。The lower surface of this prominent ring 49 is connected on the 5th step 46, so that the upper surface of shelves ring 48 is relative with the 4th step 45, and the lower surface of the second inner core 6 is extended in the lower surface of shelves ring 48。Meanwhile, sealing member 51 is set between the upper surface of shelves ring 48 and the 4th step 45。Preferably, sealing member 51 can be gum cover。Thus, put into opener 40 and opener 40 is moved down together with the second inner core 6, when, after cylinder base 28 compound in shelves ring 48 and first, the second inner core 6 continues to move down so that sealing member 51 expands and improves the sealing between the second inner core 6 and opener 40。By this set, the sealing between the second inner core 6 and opener 40 can be improved, to ensure that the second inner core 6 can move down smoothly after injection pressure liquid。
According to the present invention, as in figure 2 it is shown, arrange elastic boosting ring 52 between opener main body 41 and ball seat 21 are axial。Preferably, elastic boosting ring 52 can be glue ring。The gap between opener 40 and oil pipe 8 etc. is reduced by arranging elastic boosting ring 52。Thus, in the process passing through pressurization feeding opener 40, leakage is reduced, so that opener 40 can more successfully be admitted to。
In like manner, the axial dimension of the first inner core 60 and the second inner core 6 matches, to ensure the lower pan position of the first inner core 60。It is, after the first inner core 60 stress moves down, its lower surface can with the upper surface phase compound of the second inner core 6, to position the position of the first inner core 60。It addition, nozzle cage 2 has the upper surface 54 in the inner chamber extending to top connection 1, meanwhile, the outer wall of the first inner core 60 is configured with the 3rd step 65。Owing to the 3rd step 65 is arranged with upper surface 54 relative type motor, then between the first inner core 60 and top connection 1 and nozzle cage 2, define second space 66。In order to ensure that the first inner core 60 moves down smoothly, the wall of the first inner core 60 arranges the second pressure transmission hole 67 connected with second space 66。At the first inner core 60 relative in nozzle cage 2 folding process, the fluid being present in second space 66 is discharged by the second pressure transmission hole 67, thus ensure that the first inner core 60 moves down smoothly。Preferably, the second pressure transmission hole 67 is located close to one end of the 3rd step 65。It is, the second pressure transmission hole 67 is positioned at the top place of second space 66。
In a preferred embodiment, instrument 100 also includes the deblocking shelves ring 23 that is arranged on packer 4 lower end。The upper end of deblocking shelves ring 23 is socketed on the outer wall of center-pole 3, and lower end is connected by the 3rd shear pin 24 is fixing with lower contact 5。Meanwhile, deblocking shelves 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, the packing element 26 of expansion promotes deblocking shelves ring 23 to move downward with 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 5。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。Thus, after tubing string 50 is lowered in stratum, can step-by-step switch opener 40, actuate the second inner core 6 step by step and move, to carry out perforation and pressure break step by step。
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, will comprise oil pipe 8 and instrument 100 but does not have the tubing string 50 of opener 40 and be lowered in sleeve pipe 10, and makes formation annular space 11 between tubing string 50 and sleeve pipe 10。
Second step, puts into opener 40 in oil pipe 8。Opener 40 coordinates with the second inner core 6 of corresponding stage, to block the internal channel of the second 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), the first shear pin 20 is cut off, then the second inner core 6 and opener 40 are displaced downwardly in first cylinder base 28 place, so that nozzle 7 exposes。Now, pressure liquid is entered in piston cylinder 13 by the 4th pressure transmission hole 53 and the first pressure transmission hole 15, and promotes piston 14 to move downward so that push rod 29 acts on packing element 26, sets thus packing element 26 expands to realize packer 4。
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 annular space 11。Pressure liquid enters in pressure chamber 63 by the 3rd pressure transmission hole 64, and when pressure reaches the second force value (such as, the second force value is 35-45MPa), the 4th shear pin 56 is cut off, then the first inner core 60 moves down, thus exposing pressure break hole 9。It addition, the first inner core 60 after moving down has blocked nozzle 7, to avoid the pressure loss, it is ensured that fracturing effect。
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 (in second step, it is necessary to put into another opener 40 matched with the second inner core 6 in oil pipe 8), 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. one kind is sealed, for spraying, the instrument pressed, it is characterised in that including:
The top connection of tubular, the outer wall of described top connection arranges the pressure break hole that connection is inside and outside,
It is arranged on the nozzle cage of the tubular of the lower end of described top connection, described nozzle cage arranges the nozzle that connection is inside and outside,
It is arranged on the center-pole of the tubular of the lower end of described nozzle cage,
Being arranged on the packer on the outer wall of described nozzle cage and described center-pole, described packer has packing element assembly,
It is arranged on the lower contact of the tubular of the lower end of described center-pole,
The first inner core being arranged on the inwall of described top connection and can be connected with described top connection slidingtype, in an initial condition, described first inner core blocks described pressure break hole,
The second inner core being arranged on the inwall of described nozzle cage and can be connected with described nozzle cage slidingtype, in an initial condition, described second inner core blocks described nozzle,
Wherein, after the inner chamber of described second inner core is closed, under the first pressure effect, described second inner core is configured to move relative to described nozzle cage and expose described nozzle, and meanwhile, described packing element assembly is configured to be deformed so that described packer setting under pressure liquid effect, for completing perforating application, under the second pressure effect, described second inner core is configured to move relative to described top connection and expose described pressure break hole, has been used for fracturing operation。
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 nozzle cage, 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 nozzle cage,
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,
Being arranged on the first pressure transmission hole on the outer wall of described nozzle cage, described first pressure transmission hole connects with described cylinder。
3. instrument according to claim 2, it is characterised in that arrange the 4th pressure transmission hole on the wall of described second inner core, described 4th pressure transmission hole is configured to after described second 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 4th 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 1, it is characterised in that also include selectivity and be arranged in described second inner core and for closing the opener of the inner chamber of described second inner core, described opener includes:
Opener main body,
By the described upwardly extending elastic card of opener main body,
It is arranged on the ball seat of described opener main body lower end,
The ball coordinated with described ball seat,
Wherein, described elastic card is provided with lobe with the fit depressions on the inwall being arranged on described second inner core。
7. instrument according to claim 6, it is characterized in that, in the lower end of the groove of described second inner core, a grade ring is set, described shelves ring is configured to slide axially relative to described second inner core, and arranges sealing member between the upper surface and the second inner core of described shelves ring so that described shelves ring compresses described sealing member in the process that moves up relative to described second inner core。
8. instrument according to claim 6, it is characterised in that elastic boosting ring is set between described opener main body and described ball seat。
9. instrument according to claim 1, it is characterized in that, also include the deblocking shelves ring being arranged on described packer lower end, the upper end of described deblocking shelves ring is socketed on the outer wall of described center-pole, lower end is connected by the 3rd shear pin and described lower contact are fixing, and described deblocking shelves ring forms the first space for described deblocking shelves ring and described lower contact relative movement with described center-pole and described lower contact。
10. a tubing string, it is characterised in that include the instrument according to any one of claim 1 to 9。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610037424.4A CN105696983B (en) | 2016-01-20 | 2016-01-20 | For spraying the instrument of envelope pressure and including its tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610037424.4A CN105696983B (en) | 2016-01-20 | 2016-01-20 | For spraying the instrument of envelope pressure and including its tubing string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105696983A true CN105696983A (en) | 2016-06-22 |
| CN105696983B CN105696983B (en) | 2018-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610037424.4A Active CN105696983B (en) | 2016-01-20 | 2016-01-20 | For spraying the instrument of envelope pressure and including its tubing string |
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| Country | Link |
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| CN (1) | CN105696983B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105672955A (en) * | 2016-01-20 | 2016-06-15 | 中国石油化工股份有限公司 | Device for jet packing and fracturing and tubular column including device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105672956B (en) * | 2016-01-20 | 2019-01-29 | 中国石油化工股份有限公司 | For spraying the device of envelope pressure and comprising its tubing string |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105672955A (en) * | 2016-01-20 | 2016-06-15 | 中国石油化工股份有限公司 | Device for jet packing and fracturing and tubular column including device |
| CN105672955B (en) * | 2016-01-20 | 2018-08-17 | 中国石油化工股份有限公司 | The device of pressure is sealed for spraying and comprising its tubing string |
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| Publication number | Publication date |
|---|---|
| CN105696983B (en) | 2018-05-08 |
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