CN106437664B - Fluid erosion prevention exempts from sand card fracturing sliding bush - Google Patents
Fluid erosion prevention exempts from sand card fracturing sliding bush Download PDFInfo
- Publication number
- CN106437664B CN106437664B CN201611168472.3A CN201611168472A CN106437664B CN 106437664 B CN106437664 B CN 106437664B CN 201611168472 A CN201611168472 A CN 201611168472A CN 106437664 B CN106437664 B CN 106437664B
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- Prior art keywords
- spray orifice
- fracturing
- exempts
- outer housing
- erosion prevention
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- 239000004576 sand Substances 0.000 title claims abstract description 102
- 239000012530 fluid Substances 0.000 title claims abstract description 87
- 230000003628 erosive effect Effects 0.000 title claims abstract description 64
- 230000002265 prevention Effects 0.000 title claims abstract description 64
- 239000007921 spray Substances 0.000 claims abstract description 86
- 238000005488 sandblasting Methods 0.000 claims abstract description 67
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005191 phase separation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 description 26
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 238000003825 pressing Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 241000935974 Paralichthys dentatus Species 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 241000242541 Trematoda Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- 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
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
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)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Nozzles (AREA)
Abstract
The present invention provides a kind of fluid erosion prevention and exempts from sand card fracturing sliding bush, it can be connected with oil pipe and be set in casing, comprising: outer housing, the upper end is connected with top connection, its lower end is connected with shutdown outer cylinder, the circumferential direction of the shutdown outer cylinder is equipped with multiple apertures, mobile in the outer housing to be equipped with piston cylinder；Sandblasting main body, the upper end is arranged between the outer housing and the piston cylinder, its lower end is connected with lower contact, nozzle is embedded in the sandblasting main body, the nozzle is equipped with the spray orifice of multiple bell mouth shapes along its circumferencial direction, the spray orifice corresponding with the aperture can be connected to, and the inside of the sandblasting main body is equipped with the sliding sleeve for sealing the spray orifice, and the sliding sleeve is connected with what the lower contact can dismantle.The present invention can reduce the damage in fracturing process to casing, avoid occurring sand card when upper lifting pipe post, backwash is thorough, and pressure break is high-efficient.
Description
Technical field
The present invention relates to petroleum, natural gas extraction technical field, are a kind of fracturing tools, specifically a kind of to be suitable for from straight
The fluid erosion prevention that pressure break exploitation oil gas etc. is carried out in well, high angle hole or horizontal well exempts from sand card fracturing sliding bush.
Background technique
In oil exploitation, for abnormal high temperature high pressure low porosity and low permeability reservoir, producing well is with high angle hole, horizontal well etc.
Based on well type, staged fracturing must be carried out before operation, wherein being generally mechanical staged fracturing, the pressure break in casing cementing
Mode can improve the flow conductivity of reservoir, increase the injection rate of exploitation well yield or injection well, still, while there is also
Following deficiency:
In pressing crack construction, by the mandatory section construction of fracturing packer, after pressure break completes an interval, pitching, which is skidded, to be covered,
The pressing crack construction of next interval is carried out, if construction interval is more, tripping in packer is just more, upper packer degree of extension repeatedly
More, packer performance and sealing effect are just affected, and easily pressure break are caused to fail；Meanwhile the complete rear closing well open flow of pressure break, because of well
Mouth pressure is low, and strata pressure is high, partial open sand can be inevitably taken when liquid stream is from stratum to well head out of, so that upper lifting pipe post
When easily there is sand card, cause overhaul accident, processing difficulty is big, and the period is long, and personnel labor intensity is big, and safety is poor.
Meanwhile in pressing crack construction, is adding the sand stage that can generate inevitably damage to casing, be mainly shown as following
Two aspects: 1, the haydite in load fluid due to causing to rush casing wall under the action of inertia by sand jet outlet at a high speed
It hits, this is the primary failure mode of casing wall；2, the turbulent flow that generates around sand jet outlet, turbulent flow, cause haydite to the plough of casing wall
It cuts, makes that the peeling on microcosmic occurs around internal surface of sleeve pipe face sand jet outlet.
Furthermore after the completion of pressure break, the fracturing sand for generalling use the method for anti-flushing well to clean in tubing string and oil jacket annulus,
It injects backwash liquor from top to bottom by annular space to be cleaned, still, after multistage pressure break, the sand jet outlet of each fracturing section is
It opens, backwash liquor can enter oil pipe from the sand jet outlet for the fracturing section being located above, so that therefore backwash liquor can take a shortcut, make
Fracturing sand in underlying fracturing section can not be cleaned, and the probability of sand card is increased.
In view of the above-mentioned problems of the prior art, the present inventor combines the design and use of related manufacturing field many years
Experience provides a kind of fluid erosion prevention and exempts from sand card fracturing sliding bush, to overcome drawbacks described above.
Summary of the invention
The object of the present invention is to provide a kind of fluid erosion preventions to exempt from sand card fracturing sliding bush, to overcome above-mentioned existing fracturing tool to exist
Defect, reduce damage to casing in fracturing process, avoid occurring sand card when upper lifting pipe post, backwash is thorough, and pressure break is high-efficient.
Following technical proposal can be used to realize in above-mentioned purpose of the invention:
The present invention provides a kind of fluid erosion prevention and exempts from sand card fracturing sliding bush, and the fluid erosion prevention exempts from sand card fracturing sliding bush can be with oil pipe phase
Connect and be set in casing comprising: outer housing, the upper end are connected with top connection, and lower end is connected with shutdown outer cylinder, the shutdown
The circumferential direction of outer cylinder is equipped with multiple apertures, mobile in the outer housing to be equipped with piston cylinder；Sandblasting main body, the upper end are arranged in
Between the outer housing and the piston cylinder, lower end is connected with lower contact, and nozzle, the spray are embedded in the sandblasting main body
Mouth is equipped with the spray orifice of multiple bell mouth shapes along its circumferencial direction, and the spray orifice corresponding with the aperture can be connected to, the sandblasting master
The inside of body is equipped with the sliding sleeve for sealing the spray orifice, and the sliding sleeve is connected with what the lower contact can dismantle.
In a preferred embodiment, its circumferencial direction of the upper end edge of the piston cylinder is equipped with multiple laser slotteds, described
The outer wall projection outer lug boss of piston cylinder, the outer lug boss are located at the lower end of the laser slotted, the outer lug boss of the piston cylinder, institute
It states to enclose between the inner wall of outer housing and the top connection and sets to form pressure chamber, the pressure chamber can pass through multiple laser slotteds
It is connected with the oil pipe.
In a preferred embodiment, the inner wall of the outer housing is equipped with the first inner convex platform and the second convex from top to bottom
Platform encloses between first inner convex platform, second inner convex platform and the outer wall of the piston cylinder and sets to form accommodating chamber, the receiving
Intracavitary pressure is equipped with spring.
In a preferred embodiment, the outer wall of the sandblasting main body is equipped with groove, and interval wears the on the outer housing
The end for the inner wall that two shear pins and third shear pin, second shear pin and the third shear pin are pierced by the outer housing is blocked respectively to be set
Top and bottom in the groove.
In a preferred embodiment, it is upper mention the outer housing cut second shear pin, third shear pin position
In the state of the upper end in the groove, the aperture is mutually separated with the spray orifice, and the shutdown outer cylinder seals the spray orifice；
It is upper mention the outer housing and cut second shear pin and the third shear pin in the state of, the sandblasting main body with it is described
Outer housing is mutually separated with the piston cylinder.
In a preferred embodiment, the internal diameter of the sliding sleeve be less than the piston cylinder internal diameter, the sliding sleeve with it is described
Lower contact by the 4th shear pin be connected, on the sliding sleeve pitching build the pressure make the 4th shear pin cut in the state of, it is described
Sliding sleeve is separated with the spray orifice, and the oil pipe is connected by the annular space between the spray orifice and the oil pipe and described sleeve pipe.
In a preferred embodiment, the inner wall of the sandblasting main body is recessed with indent slope, and the nozzle is in a circular table shape,
The upper end of the nozzle is connected to the indent slope, and the lower end of the nozzle is connected to the lower contact, the indent slope
The through-hole of multiple bell mouth shapes, through-hole connection corresponding with the spray orifice are equipped with along its circumferencial direction.
In a preferred embodiment, the spray orifice is three, and three spray orifices are equal along the circumferencial direction of the nozzle
Even setting.
In a preferred embodiment, between the longitudinal center line of the spray orifice and the longitudinal center line of the sandblasting main body
With an angle.
In a preferred embodiment, the spray orifice is hyperbola along its axial cross sectional shape, the spray orifice it is interior
Diameter is 17mm~20mm.
Fluid erosion prevention of the present invention exempts from the characteristics of sand card fracturing sliding bush and advantage is:
1, it is set in casing after the present invention connects with oil pipe, by connecting shutdown outer cylinder, shutdown outer cylinder in outer housing lower end
On open up aperture corresponding with the through-hole of the spray orifice of nozzle and sandblasting main body, during making fracturing sand feeding, load fluid can be from oil
Pipe successively enters the annular space of oil pipe and casing after the aperture of the spray orifice of nozzle, the through-hole of sandblasting main body and shutdown outer cylinder, in turn
It realizes pressure break and adds sand, meanwhile, in backwash process, by upper lifting pipe post, make shutdown outer cylinder uplink to seal the spray orifice of nozzle
With the through-hole of sandblasting main body, guarantee the fracturing sand in the thorough cleaning tubing of backwash liquor energy and casing annulus and in other each tubing strings,
It avoids backwash liquor serial from each spray orifice and causes not cleaning, effectively prevent the sand card of tubing string, guarantee the suitable of tubing string uplink and downlink
Freely, safety and environmental protection, construction risk are low.
2, the present invention is uniformly arranged multiple loudspeakers along the circumferencial direction of nozzle by the way that round table-like nozzle is arranged in sandblasting main body
The spray orifice of mouth shape particularly makes spray orifice along its axial cross sectional shape in hyperbola, and make the longitudinal center line of spray orifice with
There is an angle, to improve the efficiency for carrying out fracturing sand feeding in recovery well, while high speed between the longitudinal center line of sandblasting main body
The impact to casing can be reduced by the load fluid of the spray orifice, avoid generating turbulent flow or turbulent flow around spray orifice, reduce to casing wall
Plow, reduce the damage of casing, extend Service Life of Casing, and in the construction process, can be as fracturing sand be to nozzle
The grinding of spray orifice makes the pressure difference that shuts off at nozzle become smaller, reduces operation pressure automatically.
3, by the present invention in that the upper end of sandblasting main body is arranged between outer housing and piston cylinder, make in fracturing process, it is living
Sandblasting main body is closely arranged between outer housing and piston cylinder by plug tube downlink, while passing through the uplink of outer housing and piston cylinder,
It cuts the second shear pin and third shear pin, realizes giving up for sandblasting main body and lower contact, convenient for operation, construction risk is low.
4, the present invention can be matched with packer, structurally reasonable, and fracturing effect is good, by being arranged on the outer wall of outer housing
Groove, can prevent fracturing sand from laser slotted by the design of piston cylinder upper end laser slotted convenient for the salvaging after giving up
Exempt from the inside of each components of sand card fracturing sliding bush into fluid erosion prevention and hinder the movements of components, by making sliding sleeve using high-strength
Structural alloy steel, nozzle are spent using cemented carbide material, and making sliding sleeve and nozzle has higher structural strength, can be suitably used for underground
Complicated high temperature and high pressure environment.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the half-sectional structural schematic diagram that fluid erosion prevention of the present invention exempts from sand card fracturing sliding bush；
Fig. 2-1 is the structural schematic diagram for the state of going into the well that fluid erosion prevention of the present invention exempts from sand card fracturing sliding bush；
Fig. 2-2 is the structural schematic diagram for the pitching state that fluid erosion prevention of the present invention exempts from sand card fracturing sliding bush；
Fig. 2-3 is the structural schematic diagram for the pressure break state that fluid erosion prevention of the present invention exempts from sand card fracturing sliding bush；
Fig. 2-4 is that fluid erosion prevention of the present invention exempts from that sand card fracturing sliding bush carries out the row of returning when being not turned off spray orifice and the structure of backwash is shown
It is intended to；
Fig. 2-5 is that fluid erosion prevention of the present invention exempts from the structural representation that sand card fracturing sliding bush carries out the row of returning and backwash when closing spray orifice
Figure；
Fig. 2-6 is the structural schematic diagram for the state of giving up that fluid erosion prevention of the present invention exempts from sand card fracturing sliding bush；
Fig. 3-1 is the schematic view of the front view of nozzle of the invention；
Fig. 3-2 is the left view structural representation of nozzle of the invention；
Fig. 4 is the application schematic diagram that fluid erosion prevention of the present invention exempts from sand card fracturing sliding bush.
Drawing reference numeral explanation:
1 top connection, 2 outer housings, 3 first inner convex platforms, 4 second inner convex platforms, 5 piston cylinders, 6 laser slotteds, 7 outer lug boss, 8 pressures
Power chamber, 9 accommodating chambers, 10 springs, 11 first shear pins, 12 sandblasting main bodys, 13 anchor flukes, 14 grooves, 15 second shear pins, 16 thirds are cut
Nail, 17 indent slopes, 18 through-holes, 19 shutdown outer cylinders, 20 apertures, 21 nozzles, 22 spray orifices, 23 sliding sleeves, 24 lower contacts, 25 the 4th cut
Nail, 26 sealing rings, 27 casings, 28 oil pipes, 29 safety joints, 30 sand-proof hydraulic anchors, 31 first packers, 32 second packers,
33 third packers, 34 the 4th packers, 35 lower direct-injections, 36 steel balls, 37 location holes, it is sliding that A1 first order fluid erosion prevention exempts from sand card pressure break
Set, the second level A2 fluid erosion prevention exempt from sand card fracturing sliding bush, and A3 third level fluid erosion prevention exempts from sand card fracturing sliding bush, D1 internal diameter, D2 internal diameter.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In addition to non-individual defines the direction pointed out, the upper and lower equal directions being referred to herein are shown in the present invention
Fig. 1 in upper and lower equal directions subject to, illustrate in this together.
As shown in Fig. 1 to Fig. 2-6, the present invention provides a kind of fluid erosion prevention and exempts from sand card fracturing sliding bush, and the fluid erosion prevention exempts from sand card
Fracturing sliding bush can be connected with oil pipe 28 and be set in casing 27, and it includes: outer housing 2 that the fluid erosion prevention, which exempts from sand card fracturing sliding bush,
Upper end is connected with top connection 1, and lower end is connected with shutdown outer cylinder 19, and the circumferential direction of the shutdown outer cylinder 19 is equipped with multiple apertures
20, it is mobile in the outer housing 2 to be equipped with piston cylinder 5；Sandblasting main body 12, the upper end be arranged in the outer housing 2 with it is described
Between piston cylinder 5, lower end is connected with lower contact 24, is embedded with nozzle 21 in the sandblasting main body 12, and the nozzle 21 is along it
Circumferencial direction is equipped with the spray orifice 22 of multiple bell mouth shapes, and the spray orifice 22 corresponding with the aperture 20 can be connected to, the sandblasting master
The inside of body 12 is equipped with the sliding sleeve 23 for sealing the spray orifice 22, and the sliding sleeve 23 is connected with what the lower contact 24 can dismantle.
Specifically, as shown in Figure 1, outer housing 2 is substantially cylindrical, the inner wall of the upper end of outer housing 2 and the outer wall of lower end
It is respectively equipped with connection screw thread, the lower end outer wall of top connection 1 is equipped with connection screw thread, and the inner wall of the upper end of shutdown outer cylinder 19 is equipped with connection
Screw thread makes to be connected through a screw thread between outer housing 2 and shutdown outer cylinder 19 between outer housing 2 and top connection 1, can also be in shell
Fastening screw is arranged in the threaded connection place and outer housing 2 of body 2 and top connection 1 and the threaded connection place of shutdown outer cylinder 19, to realize
More firm connection, while the inner wall of the upper end of top connection 1 is equipped with connection screw thread, so that it is connected with oil pipe 28；It closes the door outer
Cylinder 19 is substantially cylindrical, and multiple apertures 20 thereon are uniformly distributed along its circumferencial direction；Sandblasting main body 12 is substantially cylindrical,
The upper end is equipped with anchor fluke 13, the upper end of anchor fluke 13 has a protrusion outwardly protruded, is arranged on 2 inner wall of outer housing with being fastened on
In card slot, so that anchor fluke 13 is arranged between outer housing 2 and piston cylinder 5 and its close pressure is set to outer housing 2 by piston cylinder 5
On, realize the connection of sandblasting main body 12 and outer housing 2, wherein anchor fluke 13 can be multiple strips of circumferentially spaced setting
Claw, one step of outer wall projection of sandblasting main body 12, the step of sandblasting main body 12 are connected to the lower end of outer housing 2 and make sandblasting
Outer wall below the step of main body 12 is posted by the inner wall of shutdown outer cylinder 19, and nozzle 21 is made of cemented carbide material, nozzle 21
On the spray orifice 22 of bell mouth shape the load fluid for flowing through it generation can be made to shut off pressure difference, sliding sleeve 23 can be by high-strength alloy structural steel
It is made, to meet the severe working environment such as high pressure, high hydrogen sulfide, sliding sleeve 23 is tightly attached to the inner wall of the sandblasting main body 12, institute
The inner wall of nozzle 21 and the inner wall of the lower contact 24 are stated, to seal the spray orifice 22 of the nozzle 21.
Further, as shown in Figure 1, its circumferencial direction of the upper end edge of the piston cylinder 5 is equipped with multiple laser slotteds 6, institute
State the outer wall projection outer lug boss 7 of piston cylinder 5, the outer lug boss 7 is located at the lower end of the laser slotted 6, the piston cylinder 5 it is outer
Boss 7, the outer housing 2 inner wall and the top connection 1 between enclose and set to form pressure chamber 8, the pressure chamber 8 can pass through multiple
The laser slotted 6 is connected with the oil pipe 28, specifically, laser slotted 6 is the circumference by laser technology in piston cylinder 5
The a plurality of elongated gap being just upwardly formed, width are 0.16mm~0.18mm, can allow the into and out pressure of pressure fluid
Power chamber 8 and can be prevented fracturing sand from entering, avoid each component of pressure break sand abrasion, influence the normal of each component so that piston cylinder 5 moves
Work, meanwhile, outer lug boss 7 is round ring boss, and outer lug boss 7 is located at the lower section of top connection 1, sets between piston cylinder 5 and outer housing 2
There is the first shear pin 11, the first shear pin 11 is located at the lower section of the outer lug boss 7, and in pressure break, pressure fluid enters through laser slotted 6 is pressed
After in power chamber 8, pressure fluid acts on piston cylinder 5 to cut the first shear pin 11 and drive 5 downlink of piston cylinder, makes under piston cylinder 5
Portion closely compresses the anchor fluke 13 positioned at sandblasting main body 12, and in the row of returning or backwash, liquid is flowed from bottom to top to drive piston cylinder 5
Uplink, so that the liquid in pressure chamber 8 flows into oil pipe 28 from laser slotted 6.
Further, as shown in Figure 1, the inner wall of the outer housing 2 is equipped with the first inner convex platform 3 and the second convex from top to bottom
Platform 4 encloses between first inner convex platform 3, second inner convex platform 4 and the outer wall of the piston cylinder 5 and sets to form accommodating chamber 9, institute
9 internal pressure of accommodating chamber is stated equipped with spring 10, specifically, the first inner convex platform 3 and the second inner convex platform 4 are round ring boss, in first
3 level of boss extends again level straight down and extends inwardly to form the second inner convex platform 4 after extending internally, make the axial direction of accommodating chamber 9
Section is in inverted L-shaped, preferably, the first inner convex platform 3 is located at the lower section of the outer lug boss 7 of piston cylinder 5, accommodating chamber 9 is by under outer lug boss 7
Surface, the upper surface of the first inner convex platform 3, the upper surface of the second inner convex platform 4 and piston cylinder 5 outer wall enclose and set, spring 10
One end is connected to the lower surface of outer lug boss 7, and the other end of spring 10 is connected to the upper surface of the second inner convex platform 4, right on outer housing 2
It answers and is equipped with an intercommunicating pore at the lower end of accommodating chamber 9, accommodating chamber 9 is connected to by intercommunicating pore with oil jacket annulus, in favor of piston cylinder 5
It moves up and down, in the initial state (i.e. before injection fracturing sand namely spring 10 is in assembled state shown in FIG. 1), spring
10 in accommodating chamber 9 be in compressive state, piston cylinder 5 is fixedly arranged on outer housing 2 by the effect of contraction of the first shear pin 11 can not
Movement, and the upper surface of the first inner convex platform 3 and the lower surface of outer lug boss 7 have lower surface and the evagination of a spacing and top connection 1
The upper surface of platform 7 also has a spacing.
Further, as shown in Fig. 1 to Fig. 2-6, the outer wall of the sandblasting main body 12 is equipped with groove 14, the outer housing 2
Upper interval wears the second shear pin 15 and third shear pin 16, and second shear pin 15 and the third shear pin 16 are pierced by the outer housing
The end of 2 inner wall is arranged in the top and bottom in the groove 14 respectively, specifically, groove 14 is in cuboid, groove
14 are located at the lower section of the anchor fluke 13 of the sandblasting main body 12, and the second shear pin 15 and third shear pin 16 penetrate outer housing 2 and convex respectively
For the inner wall of outer housing 2 to be arranged in groove 14, the distance between the second shear pin 15 and third shear pin 16 are equal to groove 14
Length, the shearing force of third shear pin 16 is greater than or equal to the shearing force of the second shear pin 15.
Further, as shown in Figure 2-5, it is upper mention the outer housing 2 cut second shear pin 15, the third
Shear pin 16 is located in the state of the upper end in the groove 14, and the aperture 20 is separated with 22 phase of spray orifice, outside the shutdown
The 19 sealing spray orifice 22 of cylinder, that is, in upper lifting pipe post, the second shear pin 15 is first cut, the uplink in groove 14 of third shear pin 16,
Until card is closed the door to the upper end of groove 14 at this point, the anchor fluke 13 of sandblasting main body 12 is still located between piston cylinder 5 and outer housing 2
Outer cylinder 19 can close spray orifice 22 and through-hole 18；As shown in figures 2-6, it mentions the outer housing 2 upper and makes second shear pin 15 and institute
It states in the state that third shear pin 16 cuts, the sandblasting main body 12 is separated with the outer housing 2 and 5 phase of the piston cylinder, that is,
Pulling force to upper lifting pipe post continues to increase, and third shear pin 16 is then also cut, the anchor fluke 13 of sandblasting main body 12 be detached from piston cylinder 5 with
The sandwiched of outer housing 2, realization are given up.
Further, as shown in Fig. 1 to Fig. 2-3, the internal diameter D2 of the sliding sleeve 23 is less than the internal diameter D1 of the piston cylinder 5,
The sliding sleeve 23 and the lower contact 24 are connected by the 4th shear pin 25, on the sliding sleeve 23 pitching build the pressure and make the described 4th
Shear pin 25 cut in the state of, the sliding sleeve 23 is separated with the spray orifice 22, the oil pipe 28 pass through the spray orifice 22 with it is described
Annular space between oil pipe 28 and described sleeve pipe 27 is connected, specifically, sliding sleeve 23 is generally cylindrical, the internal diameter D2 of sliding sleeve 23 is small
In the outer diameter of steel ball 36, the outer diameter of the steel ball 36 is less than the internal diameter D1 of the piston cylinder 5, makes to put under the steel ball 36 in tubing string
Row injects liquid into oil pipe 28 and builds the pressure until the setting upper end in sliding sleeve 23, until the 4th shear pin 25 is cut, sliding sleeve 23
With 36 downlink of steel ball, the connection (as Figure 2-3) of the spray orifice 22 and oil pipe 28 of nozzle 21 is realized.
Further, as shown in Figure 1, the inner wall of the sandblasting main body 12 is recessed with indent slope 17, the nozzle 21 is in
Round table-like, the upper end of the nozzle 21 is connected to the indent slope 17, and the lower end of the nozzle 21 is connected to the lower contact
24, the indent slope 17 is equipped with the through-hole 18 of multiple bell mouth shapes, the through-hole 18 and the spray orifice 22 along its circumferencial direction
Corresponding connection, is arranged in what nozzle 21 consolidated between sandblasting main body 12 and lower contact 24, at the same make nozzle 21 inner wall, under
The inner wall that the inner wall and sandblasting main body 12 of connector 24 are bonded with sliding sleeve 23 is coplanar, guarantees that sliding sleeve 23 is steady and what is sealed fits in spray
On the inner wall of the inner wall of mouth 21, the inner wall of lower contact 24 and sandblasting main body 12, as shown in Fig. 3-1 and Fig. 3-2, the lower end of nozzle 21
Multiple location holes 37 are equipped with along its circumferencial direction, to guarantee that installation is accurately positioned in nozzle 21.
Preferably, the spray orifice 22 is three, and three spray orifices 22 are along the nozzle 21 as shown in Fig. 3-1 and Fig. 3-2
Circumferencial direction be uniformly arranged, while aperture 20 and through-hole 18 are also three, and in a circumferential direction respectively with 22 phase of spray orifice
Corresponding, certainly, spray orifice 22, aperture 20 and through-hole 18 may be set to be other suitable quantity, as long as guaranteeing three's quantity phase
Deng, and pressure break can be gone on smoothly, this is not restricted, it is preferred that location hole 37 is also three, three location holes 37 and three
A spray orifice 22 is staggered in a circumferential direction.
In one embodiment, have between the longitudinal center line of the spray orifice 22 and the longitudinal center line of the sandblasting main body 12
Have an angle, to alleviate impact of the load fluid of high speed to casing 27, avoid the load fluid of high speed under effect of inertia vertically to
Casing 27 is impacted, and damage and plow to casing 27 are reduced, and extends 27 service life of casing, preferably, the angle is 60
Degree (that is, make the longitudinal center line of spray orifice 22 perpendicular to the longitudinal center line of sandblasting main body 12 on the basis of, keep spray orifice 22 upward
Turn over 30 degree), it both ensure that the fracturing effect of load fluid, and also avoided the impact to casing 27.Preferably, the spray orifice 22 is along it
Axial cross sectional shape is hyperbola, is conducive to load fluid and generates the pressure difference that shuts off after spray orifice 22, the impact force of load fluid becomes
Small, flow velocity slows down, and reduces impact of the load fluid to casing 27, protection sleeve pipe 27, and the internal diameter of the spray orifice 22 is 17mm~20mm,
I.e. the internal diameter of the spray orifice 22 of toroidal is in the range.
In one embodiment, between the top connection 1 and the outer housing 2, the outer housing 2 and the piston cylinder 5
Between outer lug boss 7, between the piston cylinder 5 and the sandblasting main body 12, between the sliding sleeve 23 and the sandblasting main body 12, institute
It states between sliding sleeve 23 and the lower contact 24 and is respectively equipped with sealing ring 26 between the lower contact 24 and the sandblasting main body 12,
To realize the sealing between component two-by-two, a sealing ring 26 can be set between the component that wherein every two connects, it can also be with
Two sealing rings 26 are set, and this is not restricted.
The working principle for exempting from sand card fracturing sliding bush to fluid erosion prevention of the present invention below is illustrated:
It is connected firstly, passing through its top connection 1 or lower contact 24 with the equal tubing strings of oil pipe 28, is placed in casing 27, in pressure break
Before beginning (namely original state), as shown in Fig. 2-1, sliding sleeve 23 is fixedly arranged in sandblasting main body 12 and is closed by the 4th shear pin 25
The spray orifice 22 of nozzle 21, piston cylinder 5 are fixedly arranged in outer housing 2 by the own resilient of the first shear pin 11 and spring 10, then, to
Steel ball 36 is put into oil pipe 28, steel ball 36 falls the setting upper end in sliding sleeve 23, and as shown in Fig. 2-2, pressure is injected into oil pipe 28
Power liquid, the pressure of liquid, which acts on steel ball 36, cuts the 4th shear pin 25, and steel ball 36 and sliding sleeve 23 leave behind together, such as Fig. 2-3
It is shown, then, start pressing crack construction, fracturing fluid is injected into oil pipe 28, fracturing fluid enters outer housing 2 and piston along oil pipe 28
The inner cavity of cylinder 5, and the successively spray orifice 22 on nozzle 21, the aperture 20 on the through-hole 18 and shutdown outer cylinder 19 in sandblasting main body 12
Into the annular space of oil pipe 28 and casing 27, enters back into oil-gas Layer and carry out pressure break, at the same time, sub-fraction pressure fluid also can be suitable
Laser slotted 6 enter pressure chamber 8 and act on the outer lug boss 7 of piston cylinder 5, to cut the first shear pin 11 and push piston cylinder 5
Downlink, the continuation of spring 10 in accommodating chamber 9 are compressed, and the lower surface of the outer lug boss 7 of piston cylinder 5 is connected to the first of outer housing 2
On inner convex platform 3, the closer inner wall for being erected on outer housing 2 of the anchor fluke 13 of the lower enforcement sandblasting main body 12 of piston cylinder 5, until this
The completion of section pressing crack construction (complete, and still has pressure in oil pipe 28, piston cylinder 5 is still within position shown in Fig. 2-3 by this section of pressing crack construction
It sets)；
As in Figure 2-4, counter to be arranged (i.e. discharge fracturing fluid) or anti-flushing well after the completion of this well whole pressure break, it can
So that fracturing fluid or backwash liquor are successively entered after aperture 20, through-hole 18 and spray orifice 22 by the annular space between oil pipe 28 and casing 27
Oil pipe 28 returns to ground, alternatively, directly ground is returned to by the annular space between oil pipe 28 and casing 27, at this point, 5 meeting of piston cylinder
The uplink under the action of driving force of the elastic force of spring 10 and fracturing fluid or backwash liquor, and by the liquid in pressure chamber 8 through laser
Slot 6 is discharged, until the upper end of piston cylinder 5 be connected to top connection 1 lower end (spring 10 at this time still in compressive state, therefore,
The elastic force of spring 10 can make piston cylinder 5 be closely against the lower end of top connection 1), it is same with this until so that the liquid in pressure chamber 8 is arranged light
When, piston cylinder 5 is still pressed in sandblasting main body 12；
As shown in Figure 2-5, it is needing to propose in tubing string and tubing string there are when more fracturing sand, alternatively, for 28 He of oil pipe
Cause in annular space between casing 27 there are more fracturing sand instead to arrange or when backwash is unsmooth, can it is upper mention after oil pipe 28 again into
Row backwash: above mentioning oil pipe 28, makes outer housing 2 under the action of upper lifting power, cuts uplink after the second shear pin 15, third shear pin 16
The then uplink in groove 14, until third shear pin 16 is arranged in the upper end of the groove 14 of sandblasting main body 12, the anchor of sandblasting main body 12
Pawl 13 is still located between outer housing 2 and piston cylinder 5, at this point, shutdown outer cylinder 19 closes the through-hole 18 just, backwash liquor can be along oil
Annular space between pipe 28 and casing 27 returns up ground, realizes thoroughly cleaning, backwash liquor is avoided to enter oil pipe 28 from spray orifice 22
It inside takes a shortcut and cleaning is caused to be not thorough or can not clean；
When proposing tubing string after anti-row or anti-flushing well, is proposed in case of card is still unable to complete tubing string, part can be carried out and given up:
As shown in figures 2-6, continue above to mention oil pipe 28, make 2 uplink of outer housing and cut third shear pin 16, realize sandblasting main body 12 and shell
The separation of body 2 leaves sandblasting main body 12 together behind with nozzle 21 and lower contact 24, and piston cylinder 5 also can be in the bullet of spring 10 at this time
It is resisted against the lower end of top connection 1 under power effect.
Fluid erosion prevention of the present invention exempts from sand card fracturing sliding bush using advanced, practical design concept, can have simultaneously to oil-gas Layer
It carries out sandblasting pressure break, reduce casing damage, by closing the advantages that spray orifice realization is thoroughly cleaned, given up convenient for proposing tubing string,
It can be used for exploiting oil reservoir, gas reservoir, solable matter or solubilized substance or slurry of mineral, be a kind of structurally reasonable, adaptation evil
Bad environment, safety and environmental protection, selling price are low, fracturing effect is good, pressure break is high-efficient, petroleum and day can be exploited in the oil-gas Layer of underground
The fracturing tool of right gas, because the spray orifice 22 of toroidal thereon have the function of it is micro- shut off, can be named as and micro- shut off first
Exempt from sand card fracturing sliding bush (i.e. WJL-01 type fluid erosion prevention exempts from sand card fracturing sliding bush) for fluid erosion prevention, it when in use can be on oil pipe 28
Multiple fluid erosion preventions of connecting exempt from sand card fracturing sliding bush, such as can couple 1~5 fluid erosion prevention of the invention up and down and exempt from sand card pressure break cunning
Set, and the fluid erosion prevention of every level-one is exempted from sand card fracturing sliding bush and can be matched with tools such as packer, hydraulic anchor, safety joints, tool
Have pressure break is high-efficient, fracturing effect is good, it is easy for construction, automatically reduce operation pressure (i.e. during fracturing sand feeding, nozzle 21 is ground
Greatly, under the pressure difference that shuts off becomes, so that pressure reduction) the features such as, to better illustrate the present invention in the use of underground, as follows with a tool
Body embodiment is described that (wherein, packer can be the packing such as K341, K344, Y341, Y344 well known in the prior art
Device, and K represents expanding, Y represents compression, first digit 3 represent without support, second digit 4 represent fluid power it is setting, the
Three numbers represent deblocking mode):
Be as shown in Figure 4 four fracturing packers and three fluid erosion preventions of the invention exempt from sand card fracturing sliding bush simultaneously with oil
The structure chart for the fracturing strings that pipe 28 is connected to form, 28 lower end of oil pipe are sequentially connected safety joint 29 and sand-proof hydraulic anchor
30, the 4th fracturing section, third fracturing section, the second fracturing section and the are sequentially connected by oil pipe 28 in the lower end of sand-proof hydraulic anchor 30
One fracturing section, wherein the first fracturing section includes lower direct-injection 35, the first packer 31 for being threadedly connected to lower 35 upper end of direct-injection, and
Two fracturing sections include be threaded in 31 upper end of the first packer first order fluid erosion prevention exempt from sand card fracturing sliding bush A1, be threadedly coupled
In the second packer 32 that first order fluid erosion prevention is exempted from the oil pipe 28 on sand card fracturing sliding bush A1 and is connected on the oil pipe 28, third
Fracturing section includes being threaded in the second level fluid erosion prevention of 32 upper end of the second packer to exempt from sand card fracturing sliding bush A2, be threaded in
The third packer 33 that second level fluid erosion prevention is exempted from the oil pipe 28 on sand card fracturing sliding bush A2 and is connected on the oil pipe 28, the 4th pressure
Splitting section includes being threaded in the third level fluid erosion prevention of 33 upper end of third packer to exempt from sand card fracturing sliding bush A3, be threaded in
The 4th packer 34 that three-level fluid erosion prevention is exempted from the oil pipe 28 on sand card fracturing sliding bush A3 and is connected on the oil pipe 28, wherein the
The internal diameter that second level fluid erosion prevention exempts from the sliding sleeve 23 in sand card fracturing sliding bush A2 is greater than first order fluid erosion prevention and exempts from sand card fracturing sliding bush A1
Sliding sleeve 23 internal diameter and be less than third level fluid erosion prevention and exempt from the internal diameter of the sliding sleeve 23 in sand card fracturing sliding bush A3, to realize under
The successive pressure break of different fracturing sections on and；Because fluid erosion prevention of the invention exempts from sand card fracturing sliding bush with sandblasting and secure connection
Effect, so safety joint is no longer arranged in each fracturing section (namely between packer adjacent two-by-two), and only most upper
A safety joint 29 is arranged in the top of 4th fracturing section of side, certainly, can also be two according to actual production and technique requirement
Safety joint is set between two adjacent packers；
In construction, after under fracturing string in place, the pressing crack construction of the first fracturing section is directly carried out, to the first fracturing section
After the completion of construction, the first steel ball of investment destroys first order fluid erosion prevention and exempts from sliding sleeve 23 in sand card fracturing sliding bush A1, the first steel ball and
First order fluid erosion prevention exempts from the setting spout in lower direct-injection 35 of 23 downlink of sliding sleeve in sand card fracturing sliding bush A1, to ensure the second pressure break
The pressing crack construction of section；Then, the pressing crack construction for carrying out the second fracturing section puts into the second steel after the completion of the construction of the second fracturing section
Ball destroys second level fluid erosion prevention and exempts from sliding sleeve 23 in sand card fracturing sliding bush A2, and the second steel ball and second level fluid erosion prevention exempt from sand card pressure break
23 downlink of sliding sleeve in sliding sleeve A2 is setting on the oil pipe 28 of 32 lower end of the second packer, to guarantee that the pressure break of third fracturing section is applied
Work；Then, the pressing crack construction for carrying out third fracturing section, after the completion of the construction of third fracturing section, investment third steel ball destroys third
Grade fluid erosion prevention exempts from the sliding sleeve 23 in sand card fracturing sliding bush A3, and third steel ball and third level fluid erosion prevention are exempted from sand card fracturing sliding bush A3
23 downlink of sliding sleeve is setting on the oil pipe 28 of 33 lower end of third packer, to guarantee the pressing crack construction of the 4th fracturing section；Followed by,
The pressing crack construction for carrying out the 4th fracturing section, after the completion of pressing crack construction, each packer is in unset state (wherein packer
Structure is existing structure, realizes sealing when having fracturing fluid in tubing string, and pressure release deblocking is realized after completing pressure break), the row of returning is carried out,
After the completion of the row of returning, the fracturing sand in oil jacket annulus and oil pipe is cleaned by anti-flushing well, and propose tubing string, such as encounter sand card, can mention
The tonnage that high tubing string above mentions, the spray orifice 22 for making the fluid erosion preventions at different levels above stuck point exempt from sand card fracturing sliding bush are closed, and are carried out again anti-
Well-flushing facilitates tubing string from well out to wash the fracturing sand of stuck point, such as encounters that sand buries or tubing string still can not rise out,
It can continue to improve the tonnage that tubing string above mentions, be taken off until the tubing string fluid erosion prevention nearest from stuck point top exempts from sand Ka Yaliehuataochu
It opens, tubing string above can smoothly rise out, then salvage following tubing string by tripping in Special fishing tool again.
Fluid erosion prevention of the present invention exempts from the characteristics of sand card fracturing sliding bush and advantage is:
1, it is set in casing 27 after the present invention connects with oil pipe 28, by connecting shutdown outer cylinder 19 in 2 lower end of outer housing, closes
Aperture 20 corresponding with the through-hole 18 of the spray orifice 22 of nozzle 21 and sandblasting main body 12 is opened up on cylinder 19 outdoors, makes fracturing sand feeding mistake
Cheng Zhong, load fluid can be from the successively spray orifice 22 through nozzle 21, the through-hole 18 of sandblasting main body 12 and the opening for shutdown outer cylinder 19 of oil pipe 28
Enter the annular space of oil pipe 28 and casing 27 behind hole 20, and then realizes pressure break and add sand, meanwhile, in backwash process, by above mentioning
Tubing string makes 19 uplink of shutdown outer cylinder to seal the spray orifice 22 of nozzle 21 and the through-hole 18 of sandblasting main body 12, guarantees that backwash liquor can be thorough
Fracturing sand in bottom cleaning tubing 28 and 27 annular space of casing and in other each tubing strings avoids backwash liquor serial from each spray orifice 22 and makes
At that can not clean, the sand card of tubing string is effectively prevented, guarantees that smooth, the safety and environmental protection of tubing string uplink and downlink, construction risk are low.
2, by the way that round table-like nozzle 21 is arranged in sandblasting main body 12, the circumferencial direction along nozzle 21 is uniformly arranged the present invention
The spray orifice 22 of multiple bell mouth shapes particularly makes spray orifice 22 along its axial cross sectional shape in hyperbola, and make spray orifice 22
There is an angle between longitudinal center line and the longitudinal center line of sandblasting main body 12, carry out fracturing sand feeding in recovery well to improve
Efficiency, while high speed can reduce the impact to casing 27 by the load fluid of the spray orifice 22, and 22 surrounding of spray orifice is avoided to generate turbulent flow
Or turbulent flow, the plow to casing wall is reduced, the damage of casing 27 is reduced, extends 27 service life of casing, and in work progress
In, can grinding with fracturing sand to the spray orifice 22 of nozzle 21, so that the pressure difference that shuts off at nozzle 21 is become smaller, it is automatic to reduce construction pressure
Power.
3, by the present invention in that the upper end of sandblasting main body 12 is arranged between outer housing 2 and piston cylinder 5, make fracturing process
In, sandblasting main body 12 is closely arranged between outer housing 2 and piston cylinder 5 by 5 downlink of piston cylinder, while by outer housing 2 and being lived
The uplink of plug tube 5, the second shear pin 15 of cutting and third shear pin 16, realization sandblasting main body 12 and lower contact 24 are given up, convenient for behaviour
Make, construction risk is low.
4, the present invention can be matched with packer, structurally reasonable, and fracturing effect is good, be set on the outer wall by outer housing 2
The groove 14 set can prevent fracturing sand from laser convenient for the salvaging after giving up by the design of 5 upper end laser slotted 6 of piston cylinder
Enter at slot 6 fluid erosion prevention exempt from sand card fracturing sliding bush each components inside and hinder the movements of components, by making sliding sleeve
23 use cemented carbide material using high-strength alloy structural steel, nozzle 21, and sliding sleeve 23 and nozzle 21 is made to have higher structure
Intensity can be suitably used for the complicated high temperature and high pressure environment of underground.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, though
So the present invention is as above with preferred embodiment statement, and however, it is not intended to limit the invention, has in any technical field
Usual skill, in the range of not departing from technical solution of the present invention, when the technology contents using the disclosure above make it is a little
The equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content are changed or are modified to, according to the present invention
Technical spirit any simple modification, equivalent change and modification to the above embodiments, still fall within the technology of the present invention side
In the range of case.
Claims (10)
1. a kind of fluid erosion prevention exempts from sand card fracturing sliding bush, which is characterized in that the fluid erosion prevention exempts from sand card fracturing sliding bush can be with oil pipe phase
Connect and be set in casing, the fluid erosion prevention exempts from sand card fracturing sliding bush and includes:
Outer housing, the upper end are connected with top connection, and lower end is connected with shutdown outer cylinder, and the circumferential direction of the shutdown outer cylinder is equipped with more
A aperture, it is mobile in the outer housing to be equipped with piston cylinder；
Sandblasting main body, the upper end are arranged between the outer housing and the piston cylinder, and lower end is connected with lower contact, the spray
Nozzle is embedded in sand main body, the nozzle is equipped with the spray orifice of multiple bell mouth shapes along its circumferencial direction, and the spray orifice can be with institute
The corresponding connection of aperture is stated, the inside of the sandblasting main body is equipped with the sliding sleeve for sealing the spray orifice, the sliding sleeve and the lower contact
What can be dismantled is connected.
2. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, which is characterized in that the upper end edge of the piston cylinder its
Circumferencial direction is equipped with multiple laser slotteds, the outer wall projection outer lug boss of the piston cylinder, and the outer lug boss is located at the laser and cuts
The lower end of seam, the outer lug boss of the piston cylinder, the outer housing inner wall and the top connection between enclose and set to form pressure chamber, institute
Stating pressure chamber can be connected by multiple laser slotteds with the oil pipe.
3. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, which is characterized in that the inner wall of the outer housing is from upper
And have the first inner convex platform and the second inner convex platform, first inner convex platform, second inner convex platform and the piston cylinder it is outer
It is enclosed between wall and sets to form accommodating chamber, the accommodating chamber internal pressure is equipped with spring.
4. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, which is characterized in that the outer wall of the sandblasting main body is set
Fluted, interval wears the second shear pin and third shear pin on the outer housing, and second shear pin and the third shear pin are pierced by
The end of the inner wall of the outer housing is arranged in the top and bottom in the groove respectively.
5. fluid erosion prevention according to claim 4 exempts from sand card fracturing sliding bush, which is characterized in that mention the outer housing upper and make institute
State the cutting of the second shear pin, the third shear pin is located in the state of the upper end in the groove, the aperture and the spray orifice phase
Separation, the shutdown outer cylinder seal the spray orifice；It mentions the outer housing upper and keeps second shear pin and the third shear pin equal
In the state of cutting, the sandblasting main body is mutually separated with the outer housing and the piston cylinder.
6. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, which is characterized in that the internal diameter of the sliding sleeve is less than institute
State the internal diameter of piston cylinder, the sliding sleeve is connected with the lower contact by the 4th shear pin, on the sliding sleeve pitching build the pressure and make
In the state that 4th shear pin is cut, the sliding sleeve is separated with the spray orifice, and the oil pipe passes through the spray orifice and the oil
Annular space between pipe and described sleeve pipe is connected.
7. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, which is characterized in that the inner wall of the sandblasting main body is recessed
Equipped with indent slope, the nozzle is in a circular table shape, and the upper end of the nozzle is connected to the indent slope, the lower end of the nozzle
It is connected to the lower contact, the indent slope is equipped with the through-hole of multiple bell mouth shapes, the through-hole and institute along its circumferencial direction
State the corresponding connection of spray orifice.
8. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, which is characterized in that the spray orifice is three, three
The spray orifice is uniformly arranged along the circumferencial direction of the nozzle.
9. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, which is characterized in that the longitudinal center line of the spray orifice
There is an angle between the longitudinal center line of the sandblasting main body.
10. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, which is characterized in that the spray orifice is along its axial direction
Cross sectional shape is hyperbola, and the internal diameter of the spray orifice is 17mm~20mm.
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| CN201611168472.3A CN106437664B (en) | 2016-12-16 | 2016-12-16 | Fluid erosion prevention exempts from sand card fracturing sliding bush |
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| CN201611168472.3A CN106437664B (en) | 2016-12-16 | 2016-12-16 | Fluid erosion prevention exempts from sand card fracturing sliding bush |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483059B (en) * | 2019-09-12 | 2022-11-25 | 中国石油化工股份有限公司 | Sand blasting sliding sleeve device and well completion pipe string comprising same |
| CN113530512B (en) * | 2020-04-22 | 2023-04-25 | 中国石油天然气股份有限公司 | Fracturing string and fracturing method |
| CN114075951B (en) * | 2020-08-21 | 2024-05-24 | 中国石油化工股份有限公司 | Natural gas hydrate exploitation shaft, system and method |
| CN115217752A (en) * | 2022-06-22 | 2022-10-21 | 中国石油大学(北京) | Plunger piston |
| CN115059436B (en) * | 2022-07-14 | 2024-02-02 | 魏月萍 | Perforator for hydraulic fracturing in oil and gas exploitation |
| CN115163024A (en) * | 2022-08-04 | 2022-10-11 | 大安鸿源管业有限公司 | Novel hierarchical formula is prevented spitting sand fracturing sandblast device |
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