CN103967469A - Oil-gas well fracturing string - Google Patents
Oil-gas well fracturing string Download PDFInfo
- Publication number
- CN103967469A CN103967469A CN201310030272.1A CN201310030272A CN103967469A CN 103967469 A CN103967469 A CN 103967469A CN 201310030272 A CN201310030272 A CN 201310030272A CN 103967469 A CN103967469 A CN 103967469A
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- sandblaster
- sliding sleeve
- tubing string
- nozzle
- sidewall
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Abstract
The invention provides an oil-gas well fracturing string. The oil-gas well fracturing string comprises a first sandblaster and one or more second sandblasters, wherein the first sandblaster is arranged in a pipe casing and at the most downstream area; the second sandblasters are arranged on the upstream side of the first sandblaster. The first sandblaster comprises a hollow first body, first nozzles and a bushing; the first nozzles are arranged on the sidewall of the first body; the bushing is arranged in the first body and provided with sidewall openings; the interior of the bushing is communicated with the first nozzles through the sidewall openings. Each second sandblaster comprises a hollow second body, second nozzles, a slide bushing and shear pins; the second nozzles are arranged on the sidewall of the second body; the slide bushing is arranged in the second body and provided with sidewall openings; the shear pins are used for fixing the slide bushing; a ball seat for supporting a valve ball is arranged in the slide bushing. The slide bushing slides when the valve ball is cast into the oil-gas well fracturing string, so as to ensure that the sidewall openings of the second body are aligned with the second nozzles. The oil-gas well fracturing string is simple in structure, convenient and simple to mount and low in manufacturing cost; abrasion to the interiors of bodies of the sandblasters, caused by a high-speed liquid abrasive, can be effectively resisted, and thus the service lives of the sandblasters are prolonged.
Description
Technical field
The present invention relates to the underground work technical field in oil and gas exploitation field, be specifically related to a kind of well fracturing tubing string.
Background technology
Jet blasting fracturing equipment is well production increment development operation instrument, and this tool set waterpower well-flushing, perforation, pressure break and acidifying are in one.Utilize working string Multi-stage jet sandblast fracturing equipment can be lowered into assigned address, high-pressure abrasive material liquid penetrates at a high speed through jet blasting fracturing equipment, forms the duct of definite shape in stratum.Then to infusion high pressure mulling liquid in well, duct front end produces crack.Mulling gap, liquid-filled crack also makes it extend to earth formation deep expansion.Due to the sand packing process in mulling liquid and supported formation fracture, improve the permeability of petroleum reservoir, thereby increased Oil/gas Well output.It is more accurate that this technology is made seam position, and can combine with Acidizing Technology, increases well fracturing yield-increasing efficiency and success rate, shortens duty cycle, improves pressure break safety, in well production increment operation, obtained compared with extensive use.
But owing to passing through nozzle high velocity jet mulling liquid, the abrasive material in liquid can produce huge wearing and tearing and erosion to jet blasting fracturing equipment body, exceedes 40m when adding sand scale
3time there will be spray gun sharp worn situation, even nozzle comes off and the fracture of spray gun body.Therefore this technology is added the restriction of sand scale, and common every grade of spray gun adds sand scale only at 30m
3~ 35m
3.For extensive fracturing reform Oil/gas Well reservoir, this technique cannot meet the demands, and scope of construction item is limited to spray gun body and nozzle anti-wear performance.Therefore determined to a great extent the level of application of technique the application life of jet blasting fracturing equipment.
Patent application 201593406 discloses a kind of sand jet perforator structure that improves application life.This invention is by the external surface sulfuration one deck rubber layer at perforator body, to reduce the erosion of abrasive material liquid to tool exterior surface body.Ejector nozzle assembles by different materials assembly, and a part of assembly adopts man-made polycrystalline diamond, and a part of assembly adopts carbide alloy, and the two is welded, and improves successively the anti-wear performance of nozzle, increases the sand-passing amount of sand jet perforator.The nozzle of describing in this patent, its manufacturing cost is high, processing difficulties, and high-voltage high-speed abrasive for a long time to nozzle inner surface souring under, man-made polycrystalline diamond assembly is easy to come off, and is difficult to improve the sand jet perforator life-span.
Patent application 201241674 discloses a kind of backwash-proof erosion structure of water of sand jet perforator, this technology is installed external surface, is sealed the cemented carbide powder wear-resistant coating that positioning sleeve front end face coating thickness is 1mm by the nozzle on ejector body, this structure can reduce the backwash erosion containing sand jet that sand jet perforator suffers in course of injection to be damaged, and improves the bulk life time of hydraulic perforation device.This structure can be resisted the impact of high speed abrasive to a certain extent, but wear-resistant coating thickness is little, still can not prevent well liquid erosion for long-time construction operation.
Document " design of abradant jet perforating and fracturing integrated tool " (" oil field equipment " 03 phase in 2011) is celebrated geology and the fracturing situation in oil field for length, and has designed abradant jet perforating and fracturing integrated tool according to the technology status of abradant jet perforation.This instrument comprises centralizer, perforator, lower centralizer, one way valve.The document does not relate to the related content of raising instrument anti-wear performance.
By the analysis to prior art, can sum up the limitation of jet blasting fracturing equipment: jet blasting fracturing equipment body rub proofness is not high, and application life is short, and scope of construction item is limited, if body is adopted to more wear-resisting material, processing and manufacturing cost is higher.
Summary of the invention
For defect of the prior art as above, the object of the present invention is to provide a kind of well fracturing tubing string of the sandblaster inwall anti-wear performance with reinforcement, be the drilling well implementation tool that a kind of wear-resisting sandblast and pressure break connection are done.
According to the present invention, a kind of well fracturing tubing string is provided, comprise at least one second sandblaster of being located at the first sandblaster in downstream in pipe box and being arranged in the upstream side of the first sandblaster,
Wherein, the first sandblaster comprise hollow the first noumenon, be located at the first nozzle on the sidewall of the first noumenon, and be arranged in the lining with sidewall opening in the first noumenon, the inside of described lining is communicated with the first nozzle by sidewall opening,
The second sandblaster comprise hollow the second body, be located at second nozzle on the sidewall of the second body, be arranged in the second intrinsic sliding sleeve with sidewall opening, and described sliding sleeve is fixed on to described the second intrinsic shear pin, in described sliding sleeve, be provided with the ball seat for sealingly supporting valve ball
Wherein, described sliding sleeve can move between primary importance and the second place, when sliding sleeve is during in primary importance, sidewall opening and the second nozzle of described sliding sleeve do not line up, and make valve ball be supported on the ball seat of described sliding sleeve during when drop into valve ball in tubing string, the pressure in tubing string increases and cuts off shear pin, makes sliding sleeve slide into the second place, now the sidewall opening of described sliding sleeve aligns with second nozzle, causes the inside of described sliding sleeve to be communicated with second nozzle by sidewall opening.
Easily understand, in the time multiple the second sandblaster being set in tubing string, should make the ball seat internal diameter of the second sandblaster setting gradually along the direction of upstream increase successively, correspondingly, the diameter of the valve ball dropping into increases step by step, thereby makes the operation one by one to upstream from downstream of the second sandblaster.
In one embodiment, the step of the inner body wall of the second place of sliding sleeve by being located at the second sandblaster is located.Namely, make valve ball be supported on the ball seat of sliding sleeve during when drop into valve ball in tubing string, pressure in tubing string increases and cuts off shear pin, sliding sleeve is slid into and be located on the step of inwall of the body of the second sandblaster, thereby make sliding sleeve be positioned at second place place, now the sidewall opening of sliding sleeve aligns with second nozzle, causes the inside of described sliding sleeve to be communicated with second nozzle by sidewall opening.
In a preferred embodiment, ball seat is the taper ball seat of small end towards downstream.The diameter of valve ball is greater than the internal diameter of small end.In the time dropping into valve ball, valve ball gives ball seat impact force, thereby whole sliding sleeve is slided downstream, and then the sidewall opening of sliding sleeve is alignd with second nozzle.When inject high-pressure abrasive material liquid in tubing string time, valve ball is stuck on taper table top, blocks the outlet in flow direction downstream, and abrasive material liquid is sprayed from second sandblaster at valve ball place.
Above-mentioned lining can be located by the step of being located on the inwall of the first noumenon, or locates by pin.
In a preferred embodiment, sealing ring together with being provided with at least between the inwall of the first noumenon of the outer wall of lining and the first sandblaster.
Due in the operation process of tubing string, between the sliding sleeve in the second sandblaster and the second body, can there is the variation of relative position, therefore preferably between the outer wall of sliding sleeve and the inwall of the second body of the second sandblaster, be provided with at least together with sealing ring.
In the present invention, the material of lining and/or sliding sleeve is preferably wear-resisting alloy steel.
Preferably, the first nozzle is along the week of the sidewall of the first noumenon being upwards the taper that diameter is gradually little.Further preferably, second nozzle is along the week of the sidewall of the second body being upwards the taper that diameter is gradually little.For the as above design of nozzle, can make abrasive fluid body or sandblast liquid more effectively eject to the borehole wall.
Well fracturing tubing string according to the present invention has the advantages that to form simple, simple installation, low cost of manufacture.Especially by lining and the sliding sleeve that for example wear-resisting alloy steel of high-abrasive material is made is set respectively in the hollow body of the first sandblaster and the second sandblaster, can effectively resist the wearing and tearing of high speed abrasive material liquid to sandblaster body interior, prevent the excessive wear of sandblaster body interior and pierced through and lost efficacy by abrasive material liquid, improve significantly the anti-wear performance of sandblaster inwall, thereby increased the application life of sandblaster.In addition,, by multiple the second sandblasters are set in tubing string, can realize the pressing crack construction of the multistage sandblaster of an endowel.
Brief description of the drawings
Fig. 1 is according to the structural representation of the well fracturing tubing string of invention;
Fig. 2 is according to the structural representation of the first sandblaster of invention;
Fig. 3 is according to the structural representation of the second sandblaster of invention.
Wherein, accompanying drawing is not according to actual scale.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described, but scope of the present invention is not limited to this.
Fig. 1 is according to the structural representation of well fracturing tubing string 100 of the present invention, comprises at least one second sandblaster 60 of being located at the first sandblaster 40 in downstream in pipe box 70 and being arranged in the first sandblaster 40 upstream sides.In addition, tubing string 100 also can comprise conventional guide head 10, antipriming pipe 20 and the one way valve 30 in the downstream that is arranged in the first sandblaster 40, and is arranged on the centralizer 50 between the first sandblaster 40 and the second sandblaster 60.
Fig. 2 is the structural representation of the first sandblaster 40, comprise hollow the first noumenon 1, be located at the first nozzle 2 on the sidewall of the first noumenon 1, and being arranged in the lining with sidewall opening 43 in the first noumenon 1, the inside of lining 3 is communicated with the first nozzle 2 by sidewall opening 4.
Fig. 3 is the structural representation of the second sandblaster 60, comprise hollow the second body 11, be located at second nozzle 12 on the sidewall of the second body 11, be arranged in the second intrinsic sliding sleeve 13 with sidewall opening 14, and sliding sleeve 13 is fixed on to the shear pin 15 in the second body 11, in sliding sleeve 13, be provided with the ball seat 17 for sealingly supporting valve ball 16.Wherein, valve ball 16 does not belong to the building block of the second sandblaster 60, but artificially drops in tubing string 100 operation process.
At tubing string 100 according to the present invention in use, first will be installed in tubing string as Fig. 2 and Fig. 3 the first sandblaster 40 and the second sandblaster 60 as shown in respectively.Wherein, the lining 3 of the first sandblaster 40 and the sliding sleeve 13 of the second sandblaster 60 all can insert the cavity of body separately from the termination of sandblaster.Now, the sliding sleeve 13 in the second sandblaster 60 is in primary importance, and sidewall opening 14 and the second nozzle 12 of sliding sleeve 13 do not line up.Then tubing string 100 is lowered to the pressure break position of specifying, injects high-pressure abrasive material liquid from ground.Abrasive material liquid enters the first sandblaster 40 with lining 3, and through the first nozzle 2 ejection at a high speed on the sidewall opening 4 of lining 3 and the sidewall of the first noumenon 1, punches pipe box 70, forms duct in stratum.Then the mulling liquid that reinjects carries out follow-up pressing crack construction, and mulling liquid sprays from the first nozzle 2 of the first sandblaster 40, and pressure break is carried out in the duct having formed in stratum before.Abrasive material liquid and mulling liquid directly act on the lining of being made up of high-abrasive material 3 that is arranged in the first sandblaster 40 inside, instead of on the first noumenon 1 inwall of the first sandblaster 40, therefore significantly reduce the wear extent of the first noumenon 1 inwall of the first sandblaster 40.
After the first sandblaster 40 completes perforation and pressure break task, from ground to tubing string 100, drop into valve ball 16, when valve ball 16 arrives with the ball seat 17 of the second sandblaster 60 of sliding sleeve 13, sliding sleeve 13 slides into the step 18 on the second sandblaster 60 inwalls downstream owing to being subject to impact force.Now, sliding sleeve 13 is in the second place, and the sidewall opening 14 of sliding sleeve 13 aligns with second nozzle 12, causes the inside of sliding sleeve 13 to be communicated with second nozzle 12 by sidewall opening 14.Inject high-pressure abrasive material liquid from ground, owing to being subject to stopping of valve ball 16, abrasive material liquid can only spray from the second nozzle of the second sandblaster 60 12, punches pipe box 70, forms duct in stratum.Then the mulling liquid that reinjects carries out follow-up pressing crack construction.In the time being provided with multiple the second sandblaster in tubing string 100, one by one repeat the operation process of perforating and fracturing as above toward each sandblaster of upstream from downstream.
In one embodiment, lining 3 is located by the step of being located on the inwall of the first noumenon 1, or locates by pin (not shown).
As shown in Figure 3, the ball seat 17 of the sliding sleeve 13 of the second sandblaster 60 is set to the taper ball seat of small end towards downstream.
In a preferred embodiment, sealing ring (not shown) together with being provided with at least between the inwall of the first noumenon 1 of the outer wall of lining 3 and the first sandblaster 40.
Due in the operation process of tubing string, between sliding sleeve 13 in the second sandblaster 60 and the second body 13, can there is the variation of relative position, therefore sealing ring 19 together with in a preferred embodiment of the invention, being provided with at least between the inwall of the second body 11 of the outer wall of sliding sleeve 13 and the second sandblaster 60.
In the present invention, the material of lining 3 and/or sliding sleeve 13 is preferably the wear-resisting alloy steel with high-wear resistance.
In the present invention, preferably the first nozzle 2 along the week of the sidewall of the first noumenon 1 being upwards the taper that diameter is gradually little.Similarly, preferred second nozzle 12 is along the week of the sidewall of the second body 11 being upwards the taper that diameter is gradually little.Be conducive to like this improve the effect of perforation and sandblast pressure break.
With reference to preferred embodiment, invention has been described above, but protection scope of the present invention is not restricted to this, and all technical schemes in any scope that falls into claim are all in protection scope of the present invention.Without departing from the scope of the invention, can carry out various improvement and can replace parts wherein with equivalent it.Especially, only otherwise have structural hazard, every technical characterictic of mentioning in each embodiment all can combine in any way.
Claims (10)
1. a well fracturing tubing string, comprises at least one second sandblaster of being located at the first sandblaster in downstream in pipe box and being arranged in the upstream side of the first sandblaster,
Wherein, the first sandblaster comprise hollow the first noumenon, be located at the first nozzle on the sidewall of the first noumenon, and be arranged in the lining with sidewall opening in the first noumenon, the inside of described lining is communicated with the first nozzle by sidewall opening,
The second sandblaster comprise hollow the second body, be located at second nozzle on the sidewall of the second body, be arranged in the second intrinsic sliding sleeve with sidewall opening, and described sliding sleeve is fixed on to described the second intrinsic shear pin, in described sliding sleeve, be provided with the ball seat for sealingly supporting valve ball
Wherein, described sliding sleeve can move between primary importance and the second place, when sliding sleeve is during in primary importance, sidewall opening and the second nozzle of described sliding sleeve do not line up, and make valve ball be supported on the ball seat of described sliding sleeve during when drop into valve ball in tubing string, the pressure in tubing string increases and cuts off shear pin, makes sliding sleeve slide into the second place, now the sidewall opening of described sliding sleeve aligns with second nozzle, causes the inside of described sliding sleeve to be communicated with second nozzle by sidewall opening.
2. tubing string according to claim 1, is characterized in that, the step of the inner body wall of the second place of described sliding sleeve by being located at the second sandblaster is located.
3. tubing string according to claim 1, is characterized in that, described ball seat is the taper ball seat of small end towards downstream.
4. according to the tubing string described in any one in claim 1-3, it is characterized in that, described lining is located by the step of being located on the inwall of the first noumenon.
5. according to the tubing string described in any one in claim 1-4, it is characterized in that, described lining is located by pin.
6. according to the tubing string described in any one in claim 1-5, it is characterized in that, between the inwall of the first noumenon of the outer wall of described lining and the first sandblaster, be provided with at least together with sealing ring.
7. according to the tubing string described in any one in claim 1-6, it is characterized in that, between the inwall of the second body of the outer wall of described sliding sleeve and the second sandblaster, be provided with at least together with sealing ring.
8. tubing string according to claim 1, is characterized in that, the material of described lining and/or sliding sleeve is wear-resisting alloy steel.
9. tubing string according to claim 1, is characterized in that, described the first nozzle is along the week of the sidewall of the first noumenon being upwards the taper that diameter is gradually little.
10. tubing string according to claim 1, is characterized in that, described second nozzle is along the week of the sidewall of the second body being upwards the taper that diameter is gradually little.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310030272.1A CN103967469A (en) | 2013-01-25 | 2013-01-25 | Oil-gas well fracturing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310030272.1A CN103967469A (en) | 2013-01-25 | 2013-01-25 | Oil-gas well fracturing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103967469A true CN103967469A (en) | 2014-08-06 |
Family
ID=51237427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310030272.1A Pending CN103967469A (en) | 2013-01-25 | 2013-01-25 | Oil-gas well fracturing string |
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|---|---|
| CN (1) | CN103967469A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067373A (en) * | 2007-06-15 | 2007-11-07 | 新疆石油管理局采油工艺研究院 | One line tube column partial pressure three-layer tube column and using method thereof |
| CN201090188Y (en) * | 2007-09-18 | 2008-07-23 | 中国石油天然气股份有限公司 | Fixedly tubular pile delamination hydraulic jet perforating and compression fracture integration tubular pile |
| CN201574731U (en) * | 2009-12-29 | 2010-09-08 | 中国石油天然气集团公司 | Combined type pipe string with functions of perforation, fracturing and non-well-killing pumping of oil wells |
| CN202544829U (en) * | 2012-04-24 | 2012-11-21 | 中国石油天然气股份有限公司 | Drivepipe sliding sleeve |
| CN202645503U (en) * | 2012-06-19 | 2013-01-02 | 中国石油化工股份有限公司 | Bowling-type fracture sliding bush for oil and gas well |
-
2013
- 2013-01-25 CN CN201310030272.1A patent/CN103967469A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067373A (en) * | 2007-06-15 | 2007-11-07 | 新疆石油管理局采油工艺研究院 | One line tube column partial pressure three-layer tube column and using method thereof |
| CN201090188Y (en) * | 2007-09-18 | 2008-07-23 | 中国石油天然气股份有限公司 | Fixedly tubular pile delamination hydraulic jet perforating and compression fracture integration tubular pile |
| CN201574731U (en) * | 2009-12-29 | 2010-09-08 | 中国石油天然气集团公司 | Combined type pipe string with functions of perforation, fracturing and non-well-killing pumping of oil wells |
| CN202544829U (en) * | 2012-04-24 | 2012-11-21 | 中国石油天然气股份有限公司 | Drivepipe sliding sleeve |
| CN202645503U (en) * | 2012-06-19 | 2013-01-02 | 中国石油化工股份有限公司 | Bowling-type fracture sliding bush for oil and gas well |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20140806 |