CN106437664A - Anti-erosion and no sand card fracturing sliding bush - Google Patents
Anti-erosion and no sand card fracturing sliding bush Download PDFInfo
- Publication number
- CN106437664A CN106437664A CN201611168472.3A CN201611168472A CN106437664A CN 106437664 A CN106437664 A CN 106437664A CN 201611168472 A CN201611168472 A CN 201611168472A CN 106437664 A CN106437664 A CN 106437664A
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- China
- Prior art keywords
- fracturing
- spray orifice
- sliding bush
- sand
- shell body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004576 sand Substances 0.000 title claims abstract description 105
- 239000007921 spray Substances 0.000 claims abstract description 86
- 238000005488 sandblasting Methods 0.000 claims abstract description 69
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims description 85
- 230000003628 erosive effect Effects 0.000 claims description 62
- 230000002265 prevention Effects 0.000 claims description 62
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 25
- 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
- 239000007788 liquid Substances 0.000 description 10
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 241000935974 Paralichthys dentatus Species 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 241000242541 Trematoda Species 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 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
- 239000011148 porous material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000243 solution Substances 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
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000078 claw Anatomy 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
- 230000003292 diminished effect 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
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002002 slurry 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)
- Nozzles (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
The invention provides an anti-erosion and no sand card fracturing sliding bush which can be connected with an oil pipe and arranged inside a bushing. The anti-erosion and no sand card fracturing sliding bush compromises a shell body. The upper end of the shell body is connected with an upper contact, and the lower end of the shell body is connected with a closed outer cylinder. A plurality of open holes is arranged on the circumferential direction of the closed outer cylinder. The outer shell is provided with a movable piston cylinder. The anti-erosion and no sand card fracturing sliding bush also compromises a sand blasting body. The upper end of the sand blasting body is stuck between the shell body and the piston cylinder. The upper end of the sand blasting body is connected with a lower contact. A nozzle is embedded inside the sand blasting body. The nozzle is provided with a plurality of bell shaped spray holes along the circumferential direction. The spray holes can be communicated with the open holes. The inside of the sand blasting is provided with sliding bush which is used for sealing the spray holes, and the sliding bush is connected with the lower contact detachably. The anti-erosion and no sand card fracturing sliding bush has the advantages of being capable of reducing casing damage during fracturing, and avoiding the sand card when lifting the pope, being thorough in back flushing, and high efficient in fracturing.
Description
Technical field
The present invention relates to oil, natural gas extraction technical field, are a kind of fracturing tools, specifically a kind of it is applied to from straight
The fluid erosion prevention for carrying out pressure break exploitation oil gas etc. in well, high angle hole or horizontal well exempts from sand card fracturing sliding bush.
Background technology
In oil exploitation, for abnormal high temperature high pressure low porosity and low permeability reservoir, its producing well is with high angle hole, horizontal well etc.
Based on well type, staged fracturing must be carried out before operation, mechanical type staged fracturing, the pressure break is generally wherein in casing cementing
Mode can improve the flow conductivity of reservoir, increase the injection rate of exploitation well yield or injection well, but, which there is also simultaneously
Following deficiency：
In pressing crack construction, by the mandatory section construction of fracturing packer, after pressure break completes an interval, pitching is skidded and is covered,
Carry out the pressing crack construction of next interval, if construction interval is many, under to enter packer just many, upper packer degree of extension repeatedly
Many, packer performance and sealing effectiveness are just affected, and easily cause pressure break failure；Meanwhile, the complete rear closing well open flow of pressure break, because of well
Mouth pressure is low, strata pressure height, can inevitably take partial open sand out of so that upper lifting pipe post when liquid stream is from stratum to well head
When easily there is sand card, cause overhaul accident, intractability is big, and the cycle is long, and personnel labor intensity is big, poor stability.
Meanwhile, in pressing crack construction, inevitably damage adding the sand stage produce sleeve pipe, be mainly shown as following
Two aspects：1st, the haydite in load fluid passes through sand jet outlet due to high speed, in the presence of inertia, causes to rush casing wall
Hit, this is the primary failure mode of casing wall；2nd, the turbulent flow of generation, turbulent flow around sand jet outlet, cause plough of the haydite to casing wall
Cutting, internal surface of sleeve pipe is made just to there is the peeling on microcosmic around sand jet outlet.
Furthermore, after the completion of pressure break, method generally using anti-flushing well cleaning tubing string and the fracturing sand in oil jacket annular space,
Inject backwash liquor from top to bottom by annular space to be carried out, but, after multistage pressure break, the sand jet outlet of each fracturing section is all
Open, backwash liquor can enter oil pipe from the sand jet outlet of fracturing section above so that therefore backwash liquor can take a shortcut, and make
Fracturing sand in underlying fracturing section cannot be cleaned, and increased the probability of sand card.
In view of the problem that above-mentioned prior art is present, the present inventor combines the design for many years of related manufacture field and use
Experience, provides a kind of fluid erosion prevention and exempts from sand card fracturing sliding bush, overcome drawbacks described above.
Content of the invention
It is an object of the invention to provide a kind of fluid erosion prevention exempts from sand card fracturing sliding bush, to overcome above-mentioned existing fracturing tool to exist
Defect, reduce damage to sleeve pipe in fracturing process, it is to avoid sand card during upper lifting pipe post, occur, backwash is thorough, pressure break efficiency high.
The above-mentioned purpose of the present invention can be realized using following technical proposal：
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 located in sleeve pipe, which includes：Shell body, its upper end is connected with top connection, and its lower end is connected with outer tube of closing the door, and described is closed the door
The circumference of outer tube is provided with multiple perforates, mobile in the shell body is provided with piston cylinder；Sandblasting main body, its upper end is arranged in
Between the shell body and the piston cylinder, its lower end is connected with lower contact, is embedded with nozzle, the spray in the sandblasting main body
Mouth is provided with the spray orifice of multiple bell mouth shapes along its circumferencial direction, and the spray orifice corresponding with the perforate can be connected, the sandblasting master
The inner side of body is provided with the sliding sleeve for sealing the spray orifice, the sliding sleeve and being connected that the lower contact can be dismantled.
In a preferred embodiment, its circumferencial direction of the upper end edge of the piston cylinder is provided with multiple laser slotteds, described
The outer wall projection outer lug boss of piston cylinder, the outer lug boss is located at the lower end of the laser slotted, the outer lug boss of the piston cylinder, institute
State to enclose between the inwall of shell body and the top connection and set pressure chamber is formed, the pressure chamber can pass through multiple laser slotteds
It is connected with the oil pipe.
In a preferred embodiment, the inwall of the shell body is provided 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
Intracavity pressure is provided with spring.
In a preferred embodiment, the outer wall of the sandblasting main body is provided with groove, and on the shell body, interval wears the
The end of the inwall that two shear pins and the 3rd shear pin, second shear pin and the 3rd shear pin pass the shell body is blocked respectively and is set
Top and bottom in the groove.
In a preferred embodiment, upper carry the shell body cut off second shear pin, the 3rd shear pin position
In the state of the upper end in the groove, the perforate is separated with the spray orifice, and the outer tube of closing the door seals the spray orifice；
Carry in the state of the shell body makes second shear pin and the 3rd shear pin all cut off upper, the sandblasting main body with described
Shell body and the piston cylinder are separated.
In a preferred embodiment, the internal diameter of the sliding sleeve less than the piston cylinder internal diameter, the sliding sleeve with described
Lower contact is connected by the 4th shear pin, in the state of building the pressure to pitching on the sliding sleeve and cutting off the 4th shear pin, 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 inwall of the sandblasting main body is arranged with indent slope, the nozzle in round table-like,
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 is provided with along its circumferencial direction, through hole connection corresponding with the spray orifice.
In a preferred embodiment, the spray orifice is that three, 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 longitudinal center line of the spray orifice and the sandblasting main body
With an angle.
In a preferred embodiment, the spray orifice is the interior of hyperbola, the spray orifice along its axial cross sectional shape
Footpath is 17mm～20mm.
Fluid erosion prevention of the present invention exempts from the feature of sand card fracturing sliding bush and advantage：
1st, after the present invention is connected with oil pipe in sleeve pipe, by connecting outer tube of closing the door, outer tube of closing the door in shell body lower end
On open up the perforate 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
The annular space of oil pipe and sleeve pipe is entered after the perforate of pipe spray orifice, the through hole of sandblasting main body and outer tube of closing the door successively through nozzle, and then
Realize pressure break and add sand, meanwhile, in backwash process, by upper lifting pipe post, make the up spray orifice to seal nozzle of outer tube of closing the door
Through hole with sandblasting main body, it is ensured that the fracturing sand in backwash liquid energy thoroughly cleaning oil pipe and casing annulus and in other each tubing strings,
Avoid backwash liquor from causing to clean from each spray orifice serial, effectively prevent the sand card of tubing string, it is ensured that tubing string up-downgoing suitable
Freely, safety and environmental protection, construction risk is low.
2nd, the present invention is uniformly arranged multiple loudspeakers by arranging round table-like nozzle in sandblasting main body along the circumferencial direction of nozzle
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
Between the longitudinal center line of sandblasting main body, there is an angle, to improve the efficiency that fracturing sand feeding is carried out in recovery well, while at a high speed
The impact to sleeve pipe can be reduced through the load fluid of the spray orifice, it is to avoid around spray orifice, turbulent flow or turbulent flow is produced, reduce to casing wall
Plow, reduce the damage of sleeve pipe, extend Service Life of Casing, and in work progress, can be as fracturing sand be to nozzle
The grinding of spray orifice, makes the pressure reduction that dams at nozzle diminish, and reduces automatically operation pressure.
3 by the present invention in that the upper end of sandblasting main body is arranged between shell body and piston cylinder, is made in fracturing process, living
Plug tube is descending, and sandblasting main body is closely arranged between shell body and piston cylinder, while by the up of shell body and piston cylinder,
The second shear pin and the 3rd shear pin is cut off, giving up for sandblasting main body and lower contact is realized, be easy to operation, construction risk is low.
4th, the present invention can be supported the use with packer, rational in infrastructure, and fracturing effect is good, by arranging on the outer wall of shell body
Groove, be easy to the salvaging after giving up, by the design of piston cylinder upper end laser slotted, fracturing sand can be prevented from laser slotted
Entrance fluid erosion prevention is exempted from the inside of each parts of sand card fracturing sliding bush and hinders the motion of parts, by making sliding sleeve using high-strength
Degree structural alloy steel, nozzle adopt Hardmetal materials, make sliding sleeve and nozzle all have higher structural strength, can be suitably used for down-hole
Complexity high temperature and high pressure environment.
Description of the drawings
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to making needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 exempts from the structural representation for partly cuing open of sand card fracturing sliding bush for fluid erosion prevention of the present invention；
Fig. 2-1 exempts from the structural representation of the state of going into the well of sand card fracturing sliding bush for fluid erosion prevention of the present invention；
Fig. 2-2 exempts from the structural representation of the pitching state of sand card fracturing sliding bush for fluid erosion prevention of the present invention；
Fig. 2-3 exempts from the structural representation of the pressure break state of sand card fracturing sliding bush for fluid erosion prevention of the present invention；
Fig. 2-4 exempts from sand card fracturing sliding bush for fluid erosion prevention of the present invention and carries out the structure of the row of returning and backwash when spray orifice is not turned off to show
It is intended to；
Fig. 2-5 exempts from sand card fracturing sliding bush for fluid erosion prevention of the present invention carries out the structural representation of the row of returning and backwash when spray orifice is closed
Figure；
Fig. 2-6 exempts from the structural representation of the state of giving up of sand card fracturing sliding bush for fluid erosion prevention of the present invention；
Fig. 3-1 is the main structure diagram of the nozzle of the present invention；
Fig. 3-2 is the left view structural representation of the nozzle of the present invention；
Fig. 4 exempts from the application schematic diagram of sand card fracturing sliding bush for fluid erosion prevention of the present invention.
Drawing reference numeral explanation：
1 top connection, 2 shell bodies, 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 the 3rd cut
Nail, 17 indent slopes, 18 through holes, 19 close the door outer tube, 20 perforates, 21 nozzles, 22 spray orifices, 23 sliding sleeves, 24 lower contacts, and 25 the 4th cut
Nail, 26 sealing rings, 27 sleeve pipes, 28 oil pipes, 29 safety joints, 30 sand-proof hydraulic anchors, 31 first packers, 32 second packers,
33 the 3rd packers, 34 the 4th packers, 35 times direct-injection, 36 steel balls, 37 location holes, A1 first order fluid erosion prevention exempts from sand card pressure break cunning
Set, A2 second level fluid erosion prevention exempts 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
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
In addition to the direction pointed out of non-individual definition, the direction such as upper and lower that is referred to herein be all with shown in the present invention
Fig. 1 in the direction such as upper and lower be defined, 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 in sleeve pipe 27, the fluid erosion prevention exempts from sand card fracturing sliding bush to be included：Shell body 2, its
Upper end is connected with top connection 1, and its lower end is connected with outer tube 19 of closing the door, and the circumference for closing the door outer tube 19 is provided with multiple perforates
20, mobile in the shell body 2 it is provided with piston cylinder 5；Sandblasting main body 12, its upper end be arranged in the shell body 2 with described
Between piston cylinder 5, its 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 which
Circumferencial direction is provided with the spray orifice 22 of multiple bell mouth shapes, and the spray orifice 22 corresponding with the perforate 20 can be connected, the sandblasting master
The inner side of body 12 is provided with the sliding sleeve 23 for sealing the spray orifice 22, the sliding sleeve 23 and being connected that the lower contact 24 can be dismantled.
Specifically, as shown in figure 1, shell body 2 is substantially cylindrical, the inwall of the upper end of shell body 2 and the outer wall of lower end
Connection screw thread is respectively equipped with, the lower end outer wall of top connection 1 is provided with connection screw thread, the inwall of the upper end of outer tube 19 of closing the door is provided with connection
Screw thread, makes between shell body 2 and top connection 1 and shell body 2 is all threaded connection between outer tube 19 with closing the door, can also be in shell
The threaded connection place and shell body 2 of body 2 and top connection 1 arrange trip bolt with the threaded connection place of outer tube 19 of closing the door, to realize
More firm connection, while the inwall of the upper end of top connection 1 is provided with connection screw thread, is beneficial to which and is connected with oil pipe 28；Close outdoors
Cylinder 19 is substantially cylindrical, and multiple perforates 20 thereon are uniformly distributed along its circumferencial direction；Sandblasting main body 12 is substantially cylindrical,
Its upper end is provided with anchor fluke 13, and the upper end of anchor fluke 13 has an outwardly projection, to be fastened on setting on 2 inwall of shell body
In draw-in groove, so that anchor fluke 13 is arranged between shell body 2 and piston cylinder 5 and closely presses located at shell body 2 which by piston cylinder 5
On, the connection of sandblasting main body 12 and shell body 2 is realized, 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 is connected to the lower end of shell body 2 and makes sandblasting
Outer wall below the step of main body 12 is posted by the inwall of outer tube 19 of closing the door, and nozzle 21 is made up of Hardmetal materials, nozzle 21
On the spray orifice 22 of bell mouth shape can make to flow through its load fluid and produce the pressure reduction that dams, sliding sleeve 23 can be by high-strength alloy structural steel
Make, the working environment severe to meet high pressure, high hydrogen sulfide etc., sliding sleeve 23 is close to the inwall of the sandblasting main body 12, institute
The inwall of nozzle 21 and the inwall of the lower contact 24 is 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 provided with multiple laser slotteds 6, institute
The outer wall projection outer lug boss 7 of piston cylinder 5 is stated, the outer lug boss 7 is located at the lower end of the laser slotted 6, outside the piston cylinder 5
Enclose between boss 7, the inwall of the shell body 2 and the top connection 1 and set pressure chamber 8 is formed, the pressure chamber 8 can pass through multiple
The laser slotted 6 is connected with the oil pipe 28, and specifically, laser slotted 6 is the circumference by laser technology in piston cylinder 5
The a plurality of elongated gap that side is upwardly formed, its width is that 0.16mm～0.18mm, which can allow the into and out pressure of pressure fluid
Power chamber 8 is so that piston cylinder 5 moves, and fracturing sand can be prevented to enter, it is to avoid each part of pressure break sand abrasion, affects the normal of each part
Work, meanwhile, outer lug boss 7 is the lower section that round ring boss, outer lug boss 7 is located at top connection 1, sets between piston cylinder 5 and shell body 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 pressure through laser slotted 6
After in power chamber 8, pressure fluid acts on piston cylinder 5 to cut off the first shear pin 11 and drive piston cylinder 5 descending, makes under piston cylinder 5
Closely compression is positioned at the anchor fluke 13 of sandblasting main body 12 in portion, and in the row of returning or backwash, liquid is flowed from bottom to top to drive piston cylinder 5
Up, so that the liquid in pressure chamber 8 is flowed in oil pipe 28 from laser slotted 6.
Further, as shown in figure 1, the inwall of the shell body 2 is provided 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
State that accommodating chamber 9 is intrinsic pressure to be provided 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 outer wall of the upper surface of the second inner convex platform 4 and piston cylinder 5 enclose to set and form, 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 shell body 2
An intercommunicating pore is provided with the lower end for answering accommodating chamber 9, and accommodating chamber 9 is connected with oil jacket annular space by intercommunicating pore, is beneficial to piston cylinder 5
Move up and down, (before injection fracturing sand, namely spring 10 is in the confined state shown in Fig. 1), spring in original state
10 is in compressive state in accommodating chamber 9, and by the effect of contraction of the first shear pin 11, piston cylinder 5 being fixedly arranged on shell body 2 cannot
Motion, and the lower surface of the upper surface of the first inner convex platform 3 and outer lug boss 7 has 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 provided with groove 14, the shell body 2
Upper interval wears the second shear pin 15 and the 3rd shear pin 16, and second shear pin 15 and the 3rd shear pin 16 pass the shell body
The end of 2 inwall is arranged in the top and bottom in the groove 14 respectively, and specifically, groove 14 is in cuboid, groove
The lower section of 14 anchor flukes 13 for being located at the sandblasting main body 12, the second shear pin 15 and the 3rd shear pin 16 penetrate shell body 2 convex respectively
For shell body 2 inwall to be arranged in groove 14, the distance between the second shear pin 15 and the 3rd shear pin 16 be equal to groove 14
Length, the shearing force of the 3rd shear pin 16 is more than or equal to the shearing force of the second shear pin 15.
Further, as shown in Figure 2-5, upper carry the shell body 2 cut off second shear pin 15, the described 3rd
In the state of shear pin 16 is located at the upper end in the groove 14, the perforate 20 is separated with the spray orifice 22, and the pass is outdoors
19 sealing of the cylinder spray orifice 22, i.e. in upper lifting pipe post, the second shear pin 15 is first cut off, and the 3rd shear pin 16 is up in groove 14,
Until blocking to the upper end of groove 14, now, the anchor fluke 13 of sandblasting main body 12 is still located between piston cylinder 5 and shell body 2, is closed the door
Outer tube 19 can close spray orifice 22 and through hole 18；As shown in figures 2-6, in the upper shell body 2 that carries, second shear pin 15 and institute are made
State in the state of the 3rd shear pin 16 all cuts off, the sandblasting main body 12 is separated with the shell body 2 and the piston cylinder 5, i.e.
Treat that the pulling force of upper lifting pipe post continues to increase, the 3rd shear pin 16 then also cuts off, the anchor fluke 13 of sandblasting main body 12 depart from piston cylinder 5 with
The sandwiched of shell body 2, realizes giving 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 is connected by the 4th shear pin 25 with the lower contact 24, makes the described 4th building the pressure to pitching on the sliding sleeve 23
In the state of shear pin 25 is cut off, the sliding sleeve 23 is separated with the spray orifice 22, the oil pipe 28 by the spray orifice 22 with described
Annular space between oil pipe 28 and described sleeve pipe 27 is connected, and specifically, sliding sleeve 23 is generally cylindrical, and the internal diameter D2 of sliding sleeve 23 is little
In the external diameter of steel ball 36, the external diameter of the steel ball 36 is made under the steel ball 36 in input tubing string less than the internal diameter D1 of the piston cylinder 5
Row is until the setting upper end in sliding sleeve 23, into oil pipe 28, injection liquid is built the pressure, and is cut off up to the 4th shear pin 25, sliding sleeve 23
Descending with steel ball 36, realize the spray orifice 22 of nozzle 21 and the connection (as Figure 2-3) of oil pipe 28.
Further, as shown in figure 1, the inwall of the sandblasting main body 12 is arranged 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 provided 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 firm for nozzle 21 between sandblasting main body 12 and lower contact 24, at the same make the inwall of nozzle 21, under
The inwall that the inwall of joint 24 and sandblasting main body 12 are fitted with sliding sleeve 23 is coplanar, it is ensured that sliding sleeve 23 steadily and seal fit in spray
On the inwall of the inwall of mouth 21, the inwall 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 provided with along its circumferencial direction, to ensure that nozzle 21 is accurately positioned installation.
Preferably, as shown in Fig. 3-1 and Fig. 3-2, the spray orifice 22 is that three, three spray orifices 22 are along the nozzle 21
Circumferencial direction be uniformly arranged, while perforate 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, perforate 20 and through hole 18 it can also be provided that other suitable quantity, as long as ensureing three's quantity phase
Deng, and pressure break can be smoothed out, this is not restricted, it is preferred that location hole 37 is also three, three location holes 37 and three
Individual spray orifice 22 is crisscross arranged in a circumferential direction.
In one embodiment, have between the longitudinal center line of the longitudinal center line of the spray orifice 22 and the sandblasting main body 12
Have an angle, to alleviate impact of the load fluid of high speed to sleeve pipe 27, it is to avoid the load fluid of high speed under effect of inertia vertical to
Sleeve pipe 27 is impacted, and reduces damage and plow to sleeve pipe 27, extends 27 service life of sleeve pipe, preferably, the angle is 60
Degree (that is, making the longitudinal center line of spray orifice 22 on the basis of the longitudinal center line of sandblasting main body 12, makes spray orifice 22 upwards
Turn over 30 degree), the fracturing effect of load fluid was both ensure that, it also avoid the impact to sleeve pipe 27.Preferably, the spray orifice 22 is along which
The cross sectional shape of axial direction is hyperbola, is conducive to load fluid to produce the pressure reduction that dams after spray orifice 22, and the impulsive force of load fluid becomes
Little, flow velocity slows down, and reduces impact of the load fluid to sleeve pipe 27, protects sleeve pipe 27, and the internal diameter of the spray orifice 22 is 17mm～20mm,
I.e. the spray orifice 22 of toroidal internal diameter within the range.
In one embodiment, between the top connection 1 and the shell body 2, the shell body 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
Stating between sliding sleeve 23 and the lower contact 24 sealing ring 26 is respectively equipped with and the lower contact 24 and the sandblasting main body 12 between,
To realize sealing two-by-two between part, a sealing ring 26 can be set between the part that wherein each two connects, it is also possible to
Two sealing rings 26 are set, and this is not restricted.
The operation principle for exempting from sand card fracturing sliding bush below to fluid erosion prevention of the present invention is illustrated：
First, it is connected with tubing strings such as oil pipes 28 by its top connection 1 or lower contact 24, is placed in sleeve pipe 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 by the 4th shear pin 25 and closes
The spray orifice 22 of nozzle 21, piston cylinder 5 by its own resilient of the first shear pin 11 and spring 10 be fixedly arranged in shell body 2, then, to
Steel ball 36 is put in oil pipe 28, steel ball 36 falls the setting upper end in sliding sleeve 23, as shown in Fig. 2-2, the injection pressure into oil pipe 28
Power liquid, the pressure of liquid acts on steel ball 36 cuts off the 4th shear pin 25, and steel ball 36 and sliding sleeve 23 are left behind together, such as Fig. 2-3
Shown, then, start pressing crack construction, fracturing fluid is injected into oil pipe 28, fracturing fluid enters shell body 2 and piston along oil pipe 28
The inner chamber of cylinder 5, and the spray orifice 22 on nozzle 21, the through hole 18 in sandblasting main body 12 and the perforate 20 that closes the door on outer tube 19 successively
The annular space of oil pipe 28 and sleeve pipe 27 is entered, entering back into oil-gas Layer carries out pressure break, and at the same time, sub-fraction pressure fluid also can be suitable
Laser slotted 6 to enter pressure chamber 8 and act on the outer lug boss 7 of piston cylinder 5, to cut off the first shear pin 11 and promote piston cylinder 5
Descending, the spring 10 in accommodating chamber 9 continues to be compressed, and the lower surface of the outer lug boss 7 of piston cylinder 5 is connected to the first of shell body 2
On inner convex platform 3, the anchor fluke 13 of the lower enforcement sandblasting main body 12 of piston cylinder 5 is more closely erected on the inwall of shell body 2, until this
Section pressing crack construction completes that (this section of pressing crack construction is completed, and still has pressure in oil pipe 28, and piston cylinder 5 is still within position shown in Fig. 2-3
Put)；
As in Figure 2-4, after the completion of the whole pressure breaks of this well, counter arranged (discharge fracturing fluid) or anti-flushing well, which can
So that fracturing fluid or backwash liquor are entered successively by the annular space between oil pipe 28 and sleeve pipe 27 after perforate 20, through hole 18 and spray orifice 22
Oil pipe 28, returns to ground, or, the annular space for directly passing through between oil pipe 28 and sleeve pipe 27 returns to ground, now, 5 meeting of piston cylinder
Up in the presence of the elastic force of spring 10 and the driving force of fracturing fluid or backwash liquor, and by the liquid in pressure chamber 8 through laser
Slot 6 is discharged, until (spring 10 now still in compressive state, therefore, the upper end of piston cylinder 5 is connected to the lower end of top connection 1
The elastic force of spring 10 can make piston cylinder 5 be closely against the lower end of top connection 1), till making the liquid in pressure chamber 8 arrange light, same with this
When, piston cylinder 5 is still pressed in sandblasting main body 12；
As shown in Figure 2-5, when needing to propose to there is more fracturing sand in tubing string and tubing string, or, for 28 He of oil pipe
When there is more fracturing sand in the annular space between sleeve pipe 27 and causing anti-row or backwash smooth, can upper carry oil pipe 28 after enter again
Row backwash：Oil pipe 28 is above carried, is made shell body 2 in the presence of upper lifting power, cut off up, the 3rd shear pin 16 after the second shear pin 15
Then up in groove 14, until the 3rd 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 shell body 2 and piston cylinder 5, now, and the through hole 18 closed just by outer tube 19 of closing the door, and backwash liquor can be along oil
Annular space between pipe 28 and sleeve pipe 27 returns up ground, realizes thoroughly cleaning, it is to avoid backwash liquor enters oil pipe 28 from spray orifice 22
Inside take a shortcut and cause cleaning not thorough or cannot clean；
When anti-row or anti-flushing well propose tubing string after terminating, in case of card cannot still complete tubing string proposition, part can be carried out and given up：
As shown in figures 2-6, oil pipe 28 being carried in continuation, makes shell body 2 up and cut off the 3rd shear pin 16, realize sandblasting main body 12 and shell
The separation of body 2, makes sandblasting main body 12 leave behind together with nozzle 21 and lower contact 24, and now piston cylinder 5 also can be in the bullet of spring 10
The lower end of top connection 1 is resisted against under power effect.
Fluid erosion prevention of the present invention exempts from sand card fracturing sliding bush using advanced, practical design concept, can have to oil-gas Layer simultaneously
Sandblasting pressure break is carried out, is reduced casing damage, thoroughly cleaning realized, is given up and be easy to the advantages of proposing tubing string by closing spray orifice, its
Can be used to exploit oil reservoir, gas reservoir, solable matter or solubilized material or slurry of mineral, which is that a kind of rational in infrastructure, adaptation is disliked
Bad environment, safety and environmental protection, selling price are low, fracturing effect is good, pressure break efficiency high, can exploit oil and day in the oil-gas Layer of down-hole
Right fracturing tool of gas, because the spray orifice 22 of toroidal thereon is with micro- effect that dams, can be named as and micro- be dammed 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, which can be on oil pipe 28 when using
Multiple fluid erosion preventions of connecting exempt from sand card fracturing sliding bush, and the fluid erosion prevention that for example can couple 1～5 present invention up and down exempts from sand card pressure break cunning
Cover, and the fluid erosion prevention per one-level is exempted from sand card fracturing sliding bush and can be supported the use with instruments such as packer, hydraulic anchor, safety joints, tool
Have that pressure break efficiency high, fracturing effect be good, easy construction, (i.e. during fracturing sand feeding, nozzle 21 is ground to reduce automatically operation pressure
Greatly, under the pressure reduction that dams becomes so that reduced pressure) the features such as, for better illustrating use of the present invention in down-hole, as follows with a tool
Body embodiment is described that (wherein, packer can be insulated for K341, K344, Y341, Y344 well known in the prior art etc.
Device, and K represent expanding, Y represent compression, first digit 3 represent no support, second digit 4 represent fluid power setting, the
Three digitized representations unseal mode)：
Be as shown in Figure 4 four fracturing packers and three present invention fluid erosion prevention exempt from sand card fracturing sliding bush and meanwhile with oil
The structure chart of the fracturing strings that pipe 28 is connected to form, 28 lower end of oil pipe is sequentially connected safety joint 29 and sand-proof hydraulic anchor
30, in the lower end of sand-proof hydraulic anchor 30, the 4th fracturing section, the 3rd fracturing section, the second fracturing section and are sequentially connected by oil pipe 28
One fracturing section, wherein, the first fracturing section includes lower direct-injection 35, is threadedly connected to the first packer 31 of 35 upper end of lower direct-injection, the
Two fracturing sections include that the first order fluid erosion prevention for being threaded in 31 upper end of the first packer exempts from sand card fracturing sliding bush A1, threaded
Exempt from the oil pipe 28 on sand card fracturing sliding bush A1 and the second packer 32 being connected on the oil pipe 28 in first order fluid erosion prevention, the 3rd
Fracturing section includes that the second level fluid erosion prevention for being threaded in 32 upper end of the second packer is exempted from sand card fracturing sliding bush A2, is threaded in
Second level fluid erosion prevention exempts from the oil pipe 28 on sand card fracturing sliding bush A2 and the 3rd packer 33 being connected on the oil pipe 28, the 4th pressure
Splitting section includes that the third level fluid erosion prevention for being threaded in 33 upper end of the 3rd packer exempts from sand card fracturing sliding bush A3, is threaded in
Three-level fluid erosion prevention exempts from the oil pipe 28 on sand card fracturing sliding bush A3 and the 4th packer 34 being connected on the oil pipe 28, wherein, the
The internal diameter that two grades of fluid erosion preventions exempt from the sliding sleeve 23 in sand card fracturing sliding bush A2 is exempted from sand card fracturing sliding bush A1 more than first order fluid erosion prevention
The internal diameter of sliding sleeve 23 and exempt from the internal diameter of the sliding sleeve 23 in sand card fracturing sliding bush A3 less than third level fluid erosion prevention, with realize under
And on different fracturing sections priority pressure break；Exempt from sand card fracturing sliding bush because of the fluid erosion prevention of the present invention and there is sandblasting and secure connection
Effect, so (namely between packer adjacent two-by-two) no longer arranges safety joint in each fracturing section, and is only most going up
The top of the 4th fracturing section of side arranges a safety joint 29, certainly, according to actual production and technological requirement, it is also possible to two
Safety joint is set between two adjacent packers；
The pressing crack construction of the first fracturing section in construction, after putting in place under fracturing string, is directly carried out, treats the first fracturing section
After the completion of construction, put into the first steel ball and destroy the sliding sleeve 23 that first order fluid erosion prevention is exempted from sand card fracturing sliding bush A1, the first steel ball and
First order fluid erosion prevention exempts from the descending setting spout in lower direct-injection 35 of sliding sleeve 23 in sand card fracturing sliding bush A1, to ensure the second pressure break
The pressing crack construction of section；Then, the pressing crack construction of the second fracturing section is carried out, after the completion for the treatment of the construction of the second fracturing section, puts into the second steel
The sliding sleeve 23 that second level fluid erosion prevention is exempted from sand card fracturing sliding bush A2 destroyed by ball, and the second steel ball and second level fluid erosion prevention exempt from sand card pressure break
Sliding sleeve 23 in sliding sleeve A2 is descending setting on the oil pipe 28 of 32 lower end of the second packer, is applied with the pressure break that ensures the 3rd fracturing section
Work；Then, the pressing crack construction of the 3rd fracturing section is carried out, after the completion for the treatment of the construction of the 3rd fracturing section, is put into the 3rd steel ball and destroy the 3rd
Level fluid erosion prevention exempts from the sliding sleeve 23 in sand card fracturing sliding bush A3, and the 3rd steel ball and third level fluid erosion prevention are exempted from sand card fracturing sliding bush A3
Sliding sleeve 23 is descending setting on the oil pipe 28 of 33 lower end of the 3rd packer, to ensure the pressing crack construction of the 4th fracturing section；Followed by,
The pressing crack construction of the 4th fracturing section is carried out, after the completion for the treatment of pressing crack construction, each packer is in unset state (wherein packer
Structure is existing structure, realizes sealing when having fracturing fluid in the tubing string, realizes pressure release deblocking after pressure break is completed), the row of returning is carried out,
After the completion of the row of returning, by anti-flushing well cleaning oil jacket annular space and the fracturing sand in oil pipe, and tubing string is proposed, sand card is such as run into, can be carried
The tonnage that high tubing string is above carried, the spray orifice 22 for making the fluid erosion preventions at different levels above stuck point exempt from sand card fracturing sliding bush is closed, and is carried out again anti-
Well-flushing, to wash the fracturing sand of stuck point, contributes to tubing string and goes out from well, such as runs into that sand is buried or tubing string still cannot rise out,
Can continue to improve the tonnage that tubing string is above carried, until the tubing string fluid erosion prevention nearest from stuck point top exempts from sand Ka Yaliehuataochu taking off
Open, tubing string above smoothly can rise out, enter Special fishing tool under then passing through again and salvage following tubing string.
Fluid erosion prevention of the present invention exempts from the feature of sand card fracturing sliding bush and advantage：
1st, after the present invention is connected with oil pipe 28 in sleeve pipe 27, by connecting, in 2 lower end of shell body, outer tube 19 of closing the door, close
The perforate 20 corresponding with the through hole 18 of the spray orifice 22 of nozzle 21 and sandblasting main body 12 being opened up on cylinder 19 outdoors, makes fracturing sand feeding mistake
Cheng Zhong, load fluid can opening from the spray orifice 22 successively through nozzle 21 of oil pipe 28, the through hole 18 of sandblasting main body 12 and outer tube 19 of closing the door
The annular space of oil pipe 28 and sleeve pipe 27 is entered behind hole 20, and then is realized pressure break and added sand, meanwhile, in backwash process, by above carrying
Tubing string, the outer tube 19 that makes to close the door is up to seal the spray orifice 22 of nozzle 21 and the through hole 18 of sandblasting main body 12, it is ensured that backwash liquid energy is thorough
Fracturing sand in bottom cleaning tubing 28 and 27 annular space of sleeve pipe and in other each tubing strings, it is to avoid backwash liquor is made from 22 serial of each spray orifice
Become and cannot clean, effectively prevent the sand card of tubing string, it is ensured that smooth, the safety and environmental protection of tubing string up-downgoing, construction risk is low.
2nd, the present invention passes through to arrange round table-like nozzle 21 in sandblasting main body 12, and the circumferencial direction along nozzle 21 is uniformly arranged
The spray orifice 22 of multiple bell mouth shapes, particularly, makes spray orifice 22 along its axial cross sectional shape in hyperbola, and makes spray orifice 22
Between longitudinal center line and the longitudinal center line of sandblasting main body 12, there is an angle, fracturing sand feeding is carried out to improve in recovery well
Efficiency, while can reduce the impact to sleeve pipe 27 through the load fluid of the spray orifice 22 at a high speed, it is to avoid 22 surrounding of spray orifice produces turbulent flow
Or turbulent flow, reduce the plow to casing wall, reduce the damage of sleeve pipe 27, extend 27 service life of sleeve pipe, and in work progress
In, grinding that can be with fracturing sand to the spray orifice 22 of nozzle 21, so that the pressure reduction that dams at nozzle 21 is diminished, reduce automatically construction pressure
Power.
3 by the present invention in that the upper end of sandblasting main body 12 is arranged between shell body 2 and piston cylinder 5, makes fracturing process
In, piston cylinder 5 is descending, and sandblasting main body 12 is closely arranged between shell body 2 and piston cylinder 5, while by shell body 2 and living
Plug tube 5 up, cut off the second shear pin 15 and the 3rd shear pin 16, realize giving up for sandblasting main body 12 and lower contact 24, be easy to behaviour
Make, construction risk is low.
4th, the present invention can be supported the use with packer, rational in infrastructure, and fracturing effect is good, set on the outer wall by shell body 2
The groove 14 that puts, is easy to the salvaging after giving up, and by the design of 5 upper end laser slotted 6 of piston cylinder, can prevent fracturing sand from laser
At slot 6, entrance fluid erosion prevention is exempted from the inside of each parts of sand card fracturing sliding bush and hinders the motion of parts, by making sliding sleeve
23 adopt Hardmetal materials using high-strength alloy structural steel, nozzle 21, make sliding sleeve 23 and nozzle 21 all have higher structure
Intensity, can be suitably used for the high temperature and high pressure environment of the complexity of down-hole.
The above is only presently preferred embodiments of the present invention, not does any pro forma restriction to the present invention, though
So the present invention is stated as above with preferred embodiment, but is not limited to the present invention, is had in any art
Usual skill, in the range of without departing from technical solution of the present invention, when the technology contents using the disclosure above make a little
Change or be modified to the Equivalent embodiments of equivalent variations, as long as being the content without departing from technical solution of the present invention, according to the present invention
Technical spirit any simple modification, equivalent variations and modification that above example is made, all 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, it is characterised in that the fluid erosion prevention exempts from sand card fracturing sliding bush can be with oil pipe phase
Connect and be located in sleeve pipe, the fluid erosion prevention exempts from sand card fracturing sliding bush to be included：
Shell body, its upper end is connected with top connection, and its lower end is connected with outer tube of closing the door, and the circumference of the outer tube of closing the door is provided with many
Individual perforate, mobile in the shell body is provided with piston cylinder；
Sandblasting main body, its upper end is arranged between the shell body and the piston cylinder, and its lower end is connected with lower contact, the spray
Nozzle is embedded with sand main body, the nozzle is provided with the spray orifice of multiple bell mouth shapes along its circumferencial direction, the spray orifice can be with institute
State perforate and connection is corresponded to, the inner side of the sandblasting main body is provided with the sliding sleeve for sealing the spray orifice, the sliding sleeve and the lower contact
That can dismantled is connected.
2. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, it is characterised in that the upper end edge of the piston cylinder its
Circumferencial direction is provided with multiple laser slotteds, the outer wall projection outer lug boss of the piston cylinder, and the outer lug boss is cut positioned at the laser
The lower end of seam, encloses between the outer lug boss of the piston cylinder, the inwall of the shell body and the top connection and sets to form pressure chamber, institute
State pressure chamber to be connected with the oil pipe by multiple laser slotteds.
3. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, it is characterised in that the inwall of the shell body 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 outer
Enclose between wall and set accommodating chamber is formed, the accommodating chamber is intrinsic pressure to be provided with spring.
4. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, it is characterised in that the outer wall of the sandblasting main body sets
Fluted, on the shell body, interval wears the second shear pin and the 3rd shear pin, and second shear pin and the 3rd shear pin are passed
The end of the inwall of the shell body 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, it is characterised in that carry the shell body and make institute upper
State in the state of the second shear pin is cut off, the 3rd shear pin is located at the upper end in the groove, the perforate and the spray orifice phase
Separate, the outer tube of closing the door seals the spray orifice；Carry the shell body and make second shear pin and the 3rd shear pin equal upper
In the state of cutting off, the sandblasting main body is separated with the shell body and the piston cylinder.
6. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, it is characterised in that the internal diameter of the sliding sleeve is less than institute
The internal diameter of piston cylinder is stated, the sliding sleeve is connected by the 4th shear pin with the lower contact, make building the pressure to pitching on the sliding sleeve
In the state of 4th shear pin is cut off, the sliding sleeve is separated with the spray orifice, and the oil pipe is by 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, it is characterised in that the inwall of the sandblasting main body is recessed
Indent slope is provided with, the nozzle is in round table-like, and the upper end of the nozzle is connected to the indent slope, the lower end of the nozzle
The lower contact is connected to, the indent slope is provided with the through hole of multiple bell mouth shapes, the through hole and institute along its circumferencial direction
State spray orifice and correspond to connection.
8. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, it is characterised 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, it is characterised in that the longitudinal center line of the spray orifice
There is and the longitudinal center line of the sandblasting main body between an angle.
10. fluid erosion prevention according to claim 1 exempts from sand card fracturing sliding bush, it is characterised 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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| Application Number | Priority Date | Filing Date | Title |
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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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| CN106437664B CN106437664B (en) | 2019-01-04 |
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| CN115217752A (en) * | 2022-06-22 | 2022-10-21 | 中国石油大学(北京) | Plunger piston |
| CN115059436A (en) * | 2022-07-14 | 2022-09-16 | 李绍武 | Perforator for oil and gas exploitation hydraulic fracturing |
| 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 |
| CN115163024B (en) * | 2022-08-04 | 2024-08-13 | 大安鸿源管业有限公司 | Novel hierarchical formula prevents spouting sand fracturing sand blasting unit |
Also Published As
| Publication number | Publication date |
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| CN106437664B (en) | 2019-01-04 |
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