CN105317416A - Sand blaster - Google Patents
Sand blaster Download PDFInfo
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- CN105317416A CN105317416A CN201410374175.9A CN201410374175A CN105317416A CN 105317416 A CN105317416 A CN 105317416A CN 201410374175 A CN201410374175 A CN 201410374175A CN 105317416 A CN105317416 A CN 105317416A
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- sealing ring
- urceolus
- connecting axle
- sandblaster
- sealing
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Abstract
The invention discloses a sand blaster and belongs to the field of petroleum exploitation. The sand blaster comprises a first outer barrel, a second outer barrel, a sealing sleeve, a shear stud, a connection shaft, a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring, wherein a sand blasting hole is formed in the side face of a first end part of the first outer barrel in a penetrating manner; a second end part of the first outer barrel and a first end part of the second outer barrel are in coaxial butt joint through first threads; the connection shaft is contained in the second outer barrel; an annular cavity is formed between the outer wall of the connection shaft and the inner wall of the middle part of the second outer barrel; high-pressure gas is stored in the annular cavity; when the bearing pressure of the shear stud is greater than a strong threshold value and the shear stud is broken, the annular cavity is communicated with the sand blasting hole; the high-pressure gas and external fracturing fluid are sprayed out through the sand blasting hole. According to the sand blaster, the high-pressure energy-storage annular cavity is arranged, so that the fracturing acting force is improved; micro-cracks can be more efficiently generated in rocks near wellbore areas and well drilling pollution zones; the pressure of external fracturing construction is easily reduced and the working efficiency of fracturing an oil gas layer is improved.
Description
Technical field
The present invention relates to field of petroleum exploitation, particularly a kind of sandblaster.
Background technology
At present, at home in oil gas water well multi-section multi-layer fracture technology, general employing packer and sandblaster are assembled into tubing string and carry out multistage pressure break.In technology relevant at present, most sandblaster adopts the method increasing sand jet outlet quantity, and fracturing fluid can be sprayed through multiple sand jet outlet.But the fracturing fluid that this sandblaster only relies on surface pump group to pump into is by oil-gas Layer pressure break.When tubing string friction drag is large or drilling process pollutes, easily occur that formation rock cannot be broken, cause the situation of oil-gas Layer pressure break failure, this situation is unfavorable for the operating efficiency improving pressure break oil-gas Layer.
Summary of the invention
In order to overcome the problems referred to above, embodiments provide a kind of sandblaster.Described technical scheme is as follows:
A kind of sandblaster, described sandblaster comprises the first urceolus, the second urceolus, sealing shroud, WELDING STUDS, connecting axle, the first sealing ring, the second sealing ring, the 3rd sealing ring and the 4th sealing ring;
The first end side of described first urceolus is run through and is offered sand jet outlet, and the first end of the second end of described first urceolus and described second urceolus through the first threaded coaxial to docking;
Described sealing shroud abuts and is contained in described first urceolus; The first end of described sealing shroud and the first end of described first urceolus are fixed through described WELDING STUDS; The second end of described sealing shroud abuts and is contained in described connecting axle; Described first sealing ring coupling is sheathed on the periphery of the first end of described sealing shroud, and described first sealing ring is held between the inwall of the outer wall of the first end of described sealing shroud and the first end of described first urceolus; Described second sealing ring coupling is sheathed on the periphery at the middle part of described sealing shroud, and described second sealing ring is held between the inwall of the outer wall of described sealing shroud and the first end of described second urceolus; Described 3rd sealing ring coupling is sheathed on the periphery of the second end of described sealing shroud, and described 3rd sealing ring is held between the inwall of the outer wall of described sealing shroud and the first end of described connecting axle;
Described connecting axle is contained in described second urceolus, and establishes toroidal cavity between the inwall at the middle part of the outer wall of described connecting axle and described second urceolus, stores gases at high pressure in described toroidal cavity; The first end of described connecting axle and the first end fit of described second urceolus, the second end of described connecting axle is threaded through second with the second end of described second urceolus; Described 4th sealing ring coupling is sheathed on the periphery of the second end of described connecting axle, and described 4th sealing ring is held between the inwall of the outer wall of the second end of described connecting axle and the second end of described second urceolus; Described second screw thread is relatively near described toroidal cavity, and described 4th sealing ring is relatively away from described toroidal cavity;
Described WELDING STUDS bear pressure be greater than threshold pressure fracture time, described sealing shroud slides in described connecting axle along described first outer tube inner wall, and described toroidal cavity is communicated with described sand jet outlet, and described gases at high pressure and extraneous fracturing fluid spray through described sand jet outlet.
Wherein, when described WELDING STUDS fixes the first end of the first end of described sealing shroud and described first urceolus, cover chalaza and described 3rd sealing ring of the first end of described first sealing ring, described WELDING STUDS, described sand jet outlet, described first screw thread, described second sealing ring, described connecting axle and the first end of described second urceolus are arranged in order along described axis.
Wherein, the quantity of described first sealing ring, described second sealing ring, described 3rd sealing ring and described 4th sealing ring is all 2 groups.
Wherein, the inner wall surface in the middle part of described second urceolus offers the first cannelure, and the outer wall surface in the middle part of described connecting axle offers the second cannelure, and described first cannelure and described second cannelure correspondence arrange and form described toroidal cavity.
Wherein, the outer wall surface of the first end of described connecting axle offers the link slot extended along described axial direction; When described WELDING STUDS fracture, described sealing shroud slides along described first outer tube inner wall, and described link slot is communicated with described toroidal cavity and described sand jet outlet.
Wherein, the quantity of described link slot is 2, and is symmetrical arranged; The quantity of described sand jet outlet is 4, and circumference is evenly arranged.
Wherein, described sandblaster also comprises admission valve assembly, and the first end of described toroidal cavity is located at by described admission valve assembly, and extraneous source of the gas is that described toroidal cavity injects gases at high pressure through described admission valve assembly.
Wherein, described sandblaster also comprises plug and the 5th sealing ring; The second end of described toroidal cavity is located at by described plug and described 5th sealing ring, and described 5th sealing ring is sheathed on described plug, and the first connector offered by described second urceolus, and described plug coupling is fixed on described first connector.
Wherein, the inwall of described connecting axle establishes limited step; When described WELDING STUDS fracture, described sealing shroud slides along described first outer tube inner wall, stops sliding until described sealing shroud is connected to described limited step.
Wherein, annular slot is offered in the first end periphery of described sealing shroud, and the first end of described first urceolus runs through offers the second connector, and described WELDING STUDS is connected to described annular slot through described second connector.
In the sandblaster that the embodiment of the present invention provides, before enforcement fracturing work, first open plug, other foreign gases in emptying toroidal cavity.Then in toroidal cavity, gases at high pressure are injected by admission valve assembly.Then sandblaster is connected other extraneous assemblies to start as a whole to drop into operation.First dropping into adaptive the blocking up of extraneous steel ball is connected on back taper face, and then extraneous pressure break pump truck pumps into fracturing fluid in the tubing string of sealing shroud.Due to the obstruction of extraneous steel ball, fracturing fluid cannot be descending.Along with fracturing fluid is to the pressure increase of sealing shroud, WELDING STUDS cannot be born this pressure gradually and rupture, and now, sealing shroud, along the first outer tube inner wall landing in connecting axle, exposes sand jet outlet, and toroidal cavity is communicated with sand jet outlet through link slot.Gases at high pressure and extraneous fracturing fluid spray through sand jet outlet and enter stratum, and the rock of near wellbore zone and drilling damage zone produce microcrack under gases at high pressure and of the fracturing fluid effect
To sum up, the sandblaster that the embodiment of the present invention provides, by arranging the toroidal cavity of high-voltage energy storage, improve pressure break active force, microcrack can be produced more expeditiously on the rock and drilling damage zone of near wellbore zone, be beneficial to the pressure reducing fracturing outside construction, improve the operating efficiency of pressure break oil-gas Layer.
Accompanying drawing explanation
Fig. 1 is the semi-section view of the sandblaster provided in the embodiment of the present invention;
Fig. 2 is based on the AA cross section view shown in Fig. 1;
Fig. 3 is the partial enlarged view based on the III portion shown in Fig. 1;
Fig. 4 is the partial enlarged view based on the IV portion shown in Fig. 1.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
See Fig. 1, embodiments provide a kind of sandblaster 100, be applied to field of petroleum exploitation.Sandblaster 100 comprises the first urceolus 10, second urceolus 20, sealing shroud 30, WELDING STUDS 40, first sealing ring 50, second sealing ring 51, the 3rd sealing ring 52, connecting axle 60 and the 4th sealing ring 53.
First urceolus 10 and the second urceolus 20 is coaxial sets gradually.The first end side of the first urceolus 10 is run through and is offered sand jet outlet 11.In addition, the first end of the first urceolus 10 also establishes the 3rd screw thread 12 (internal thread), to be connected with other extraneous oil exploitation structural members.In present embodiment, what the axis of the first urceolus 10 was concrete is straight down, and the first urceolus 10 is in top, and the second urceolus 20 is in below.In addition, the first end of same parts is positioned at the top of the second end.In other embodiments, this axial direction can change direction according to the actual needs of user, as horizontal positioned or angle setting.
The second end of the first urceolus 10 docks through the first screw thread 13 with the first end of the second urceolus 20, and after docking, the first urceolus 10 and the second urceolus 20 are in hollow tubular.Optionally, the second end of the first urceolus 10 establishes internal thread, and the first end of the second urceolus 20 establishes external screw thread, and both are threaded formation first screw thread 13.
Sealing shroud 30 is in hollow tubular, and the end face of the first end of sealing shroud 30 (i.e. upper surface) is in back taper face 31, and back taper face 31 is for accepting extraneous steel ball (not shown).Extraneous steel ball adaptation is stifled to be connected on back taper face 31, thus makes fracturing fluid cannot be descending.
Sealing shroud 30 abuts and is contained in the first urceolus 10.The first end of sealing shroud 30 and the first end of the first urceolus 10 are fixed through WELDING STUDS 40.When WELDING STUDS 40 fixing seal cover 30 and first position of urceolus 10, the corresponding packing sand jet outlet 11 of sealing shroud 30, now this sandblaster 100 does not spray fracturing fluid.
The second end of sealing shroud 30 abuts and is contained in connecting axle 60, is beneficial to sealing shroud 30 landing and is contained in connecting axle 60.Also be beneficial to the second end and second urceolus 20 of closed isolating seal cover 30.
In order to increase the sealing of this sandblaster 100, first sealing ring 50 coupling is sheathed on the periphery of the first end of sealing shroud 30, first sealing ring 50 is held between the inwall of the outer wall of the first end of sealing shroud 30 and the first end of the first urceolus 10, and the first sealing ring 50 is for isolated connection space between these sandblaster 100 and extraneous parts.Second sealing ring 51 coupling is sheathed on the periphery at the middle part of sealing shroud 30, second sealing ring 51 is held between the inwall of the outer wall of sealing shroud 30 and the first end of the second urceolus 20, and the second sealing ring 51 is for isolated connection space between first urceolus 10 and the second urceolus 20.3rd sealing ring 52 coupling is sheathed on the periphery of the second end of sealing shroud 30,3rd sealing ring 52 is held between the inwall of the outer wall of sealing shroud 30 and the first end of connecting axle 60, and the 3rd sealing ring 52 is for the connection space between isolated connecting axle 60 and the second urceolus 20.
From above-mentioned position relationship, in the present embodiment, when first end and the first end of the first urceolus 10 of WELDING STUDS 40 fixing seal cover 30, cover chalaza and the 3rd sealing ring 52 of the first sealing ring 50, WELDING STUDS 40, sand jet outlet 11, first screw thread 13, second sealing ring 51, the first end of connecting axle 60 and the first end of the second urceolus 20 are arranged in order vertically.In other embodiments, the position of above-mentioned all parts is not limited to this, can suitably adjust under the reliable condition of guarantee sealing performance.
Connecting axle 60 is contained in the second urceolus 20, and establishes toroidal cavity 61 between the inwall at the middle part of the outer wall of connecting axle 60 and the second urceolus 20, stores gases at high pressure in toroidal cavity 61.The first end of connecting axle 60 and the first end fit of the second urceolus 20, the second end of connecting axle 60 is connected through the second screw thread 62 with the second end of the second urceolus 20.Connecting axle 60 is for forming toroidal cavity 61 with the second urceolus 20.4th sealing ring 53 coupling is sheathed on the periphery of the second end of connecting axle 60, and the 4th sealing ring 53 is held between the inwall of the outer wall of the second end of connecting axle 60 and the second end of the second urceolus 20.Second screw thread 62 is relatively near toroidal cavity 61, and the 4th sealing ring 53 is relatively away from toroidal cavity 61.4th sealing ring 53 is for isolated connecting axle 60 and other extraneous parts.The second end part of connecting axle 60 stretches out the second urceolus 20, and arranges external screw thread 64, for connecting other extraneous parts.
In present embodiment, the quantity of the first sealing ring 50, second sealing ring 51, the 3rd sealing ring 52 and the 4th sealing ring 53 is all 2 groups.In other embodiments, can need according to practical application the quantity increasing or reduce sealing ring.
The inwall of connecting axle 60 establishes limited step 63.When WELDING STUDS 40 ruptures, sealing shroud 30 slides along the first urceolus 10 inwall, stops sliding until sealing shroud 30 is connected to limited step 63.In other embodiments, limited step 63 can not be set, during sealing shroud 30 landing, expose sand jet outlet 11.
Comprehensive see Fig. 1 and Fig. 2, the outer wall surface of the first end of connecting axle 60 abuts the inwall being contained in the second urceolus 20, and the outer wall surface of the first end of connecting axle 60 offers the link slot 64 in axial direction extended.When WELDING STUDS 40 ruptures, sealing shroud 30 slides along the first urceolus 10 inwall, and link slot 64 is communicated with toroidal cavity 61 and sand jet outlet 11.It should be noted that between the fit end face and the second urceolus 20 of the first end of connecting axle 60 can not seamless link and there is space.Toroidal cavity 61 is communicated with sand jet outlet 11 with this space through link slot 64.In addition, also there is space in other each connection of thread, only when arranging each sealing ring, and the sealing of guarantee toroidal cavity 61.
The quantity of link slot 64 is 2, and is symmetrical arranged.The quantity of sand jet outlet 11 is 4, and circumference is evenly arranged.Connecting axle 60 being arranged link slot 64, is in order to suitable throttling, and reduce the gas usage in toroidal cavity 61, cut the waste gas as far as possible.In other embodiments, connecting axle 60 can not arrange link slot 64, and only arranges toroidal cavity 61 and be directly communicated to sand jet outlet 11 through space.
The inner wall surface in the middle part of the second urceolus 20 is adopted to offer the first cannelure (not indicating in figure), outer wall surface in the middle part of connecting axle 60 offers the second cannelure (not indicating in figure), the structure that first cannelure and the second cannelure correspondence are arranged, looping cavity 61.
Comprehensive see Fig. 1 and Fig. 3, conveniently inflation/deflation is carried out to toroidal cavity 61.This sandblaster 100 is also provided with admission valve assembly 70 and plug 80 (see Fig. 4).
Admission valve assembly 70 is for inflating toroidal cavity 61.The first end of toroidal cavity 61 is located at by admission valve assembly 70, and extraneous source of the gas injects gases at high pressure through admission valve assembly 70 for toroidal cavity 61.Pressure more than the stressor layer fracture pressure 10MPa above Ground of gases at high pressure.
In present embodiment, admission valve assembly 70 comprises Intake shaft 71, air inlet nut 72, spring 73 and the 6th sealing ring 74.Intake shaft 71 connects the second urceolus 20 and toroidal cavity 61, and spring 73 is sheathed on outside connecting axle 60.Intake shaft 71 and spring 73 are all placed in air inlet nut 72, and the 6th sealing ring 74 is held between air inlet nut 74 and the second urceolus 20.Admission valve assembly 70 is for this toroidal cavity 61 of fit sealing after inflation.
Comprehensive see Fig. 1 and Fig. 4, plug 80 is for being vented toroidal cavity 61.The second end of toroidal cavity 61 is located at by plug 80 and the 5th sealing ring 81, and the 5th sealing ring 81 is sheathed on plug 80, and the first connector offered by the second urceolus 20, and plug 80 coupling is fixed on the first connector.
Refer again to Fig. 1, in order to be beneficial to, WELDING STUDS 40 is mounted on sealing shroud 30, annular slot (not indicating in figure) is offered in the first end periphery of sealing shroud 30, the first end of the first urceolus 10 runs through offers the second connector, and WELDING STUDS 40 is connected to annular slot through the second connector.When WELDING STUDS 40 bear pressure be greater than threshold pressure fracture time, sealing shroud 30 slides in connecting axle 60 along the first urceolus 10 inwall, and toroidal cavity 61 is communicated with sand jet outlet 11, and gases at high pressure and extraneous fracturing fluid spray through sand jet outlet 11.In other embodiments, sealing shroud 30 can offer one or more interface, to connect WELDING STUDS 40.
In the sandblaster 100 that the embodiment of the present invention provides, before enforcement fracturing work, first open plug 80, other foreign gases in emptying toroidal cavity 61.Then in toroidal cavity 61, gases at high pressure are injected by admission valve assembly 70.Then sandblaster 100 is connected other extraneous assemblies to start as a whole to drop into operation.First dropping into adaptive the blocking up of extraneous steel ball is connected on back taper face 31, and then extraneous pressure break pump truck pumps into fracturing fluid in the tubing string of sealing shroud 30.Due to the obstruction of extraneous steel ball, fracturing fluid cannot be descending.Along with fracturing fluid is to the pressure increase of sealing shroud 30, WELDING STUDS 40 cannot be born this pressure gradually and rupture, and now, sealing shroud 30 is along the first urceolus 10 inwall landing in connecting axle 60, expose sand jet outlet 11, toroidal cavity 61 is communicated with sand jet outlet 11 through link slot 64.Gases at high pressure and extraneous fracturing fluid spray through sand jet outlet 11 and enter stratum, and the rock of near wellbore zone and drilling damage zone produce microcrack under gases at high pressure and of the fracturing fluid effect
To sum up, the sandblaster 100 that the embodiment of the present invention provides, by arranging the toroidal cavity 61 of high-voltage energy storage, improve pressure break active force, microcrack can be produced more expeditiously on the rock and drilling damage zone of near wellbore zone, be beneficial to the pressure reducing fracturing outside construction, improve the operating efficiency of pressure break oil-gas Layer.
These are only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a sandblaster, is characterized in that, described sandblaster comprises the first urceolus, the second urceolus, sealing shroud, WELDING STUDS, connecting axle, the first sealing ring, the second sealing ring, the 3rd sealing ring and the 4th sealing ring;
The first end side of described first urceolus is run through and is offered sand jet outlet, and the first end of the second end of described first urceolus and described second urceolus through the first threaded coaxial to docking;
Described sealing shroud abuts and is contained in described first urceolus; The first end of described sealing shroud and the first end of described first urceolus are fixed through described WELDING STUDS; The second end of described sealing shroud abuts and is contained in described connecting axle; Described first sealing ring coupling is sheathed on the periphery of the first end of described sealing shroud, and described first sealing ring is held between the inwall of the outer wall of the first end of described sealing shroud and the first end of described first urceolus; Described second sealing ring coupling is sheathed on the periphery at the middle part of described sealing shroud, and described second sealing ring is held between the inwall of the outer wall of described sealing shroud and the first end of described second urceolus; Described 3rd sealing ring coupling is sheathed on the periphery of the second end of described sealing shroud, and described 3rd sealing ring is held between the inwall of the outer wall of described sealing shroud and the first end of described connecting axle;
Described connecting axle is contained in described second urceolus, and establishes toroidal cavity between the inwall at the middle part of the outer wall of described connecting axle and described second urceolus, stores gases at high pressure in described toroidal cavity; The first end of described connecting axle and the first end fit of described second urceolus, the second end of described connecting axle is threaded through second with the second end of described second urceolus; Described 4th sealing ring coupling is sheathed on the periphery of the second end of described connecting axle, and described 4th sealing ring is held between the inwall of the outer wall of the second end of described connecting axle and the second end of described second urceolus; Described second screw thread is relatively near described toroidal cavity, and described 4th sealing ring is relatively away from described toroidal cavity;
Described WELDING STUDS bear pressure be greater than threshold pressure fracture time, described sealing shroud slides in described connecting axle along described first outer tube inner wall, and described toroidal cavity is communicated with described sand jet outlet, and described gases at high pressure and extraneous fracturing fluid spray through described sand jet outlet.
2. sandblaster as claimed in claim 1, it is characterized in that, when described WELDING STUDS fixes the first end of the first end of described sealing shroud and described first urceolus, cover chalaza and described 3rd sealing ring of the first end of described first sealing ring, described WELDING STUDS, described sand jet outlet, described first screw thread, described second sealing ring, described connecting axle and the first end of described second urceolus are arranged in order along described axis.
3. sandblaster as claimed in claim 1, is characterized in that, the quantity of described first sealing ring, described second sealing ring, described 3rd sealing ring and described 4th sealing ring is all 2 groups.
4. sandblaster as claimed in claim 1, it is characterized in that, inner wall surface in the middle part of described second urceolus offers the first cannelure, and the outer wall surface in the middle part of described connecting axle offers the second cannelure, and described first cannelure and described second cannelure correspondence arrange and form described toroidal cavity.
5. sandblaster as claimed in claim 1, it is characterized in that, the outer wall surface of the first end of described connecting axle offers the link slot extended along described axial direction; When described WELDING STUDS fracture, described sealing shroud slides along described first outer tube inner wall, and described link slot is communicated with described toroidal cavity and described sand jet outlet.
6. sandblaster as claimed in claim 5, it is characterized in that, the quantity of described link slot is 2, and is symmetrical arranged; The quantity of described sand jet outlet is 4, and circumference is evenly arranged.
7. sandblaster as claimed in claim 1, it is characterized in that, described sandblaster also comprises admission valve assembly, and the first end of described toroidal cavity is located at by described admission valve assembly, and extraneous source of the gas is that described toroidal cavity injects gases at high pressure through described admission valve assembly.
8. sandblaster as claimed in claim 1, it is characterized in that, described sandblaster also comprises plug and the 5th sealing ring; The second end of described toroidal cavity is located at by described plug and described 5th sealing ring, and described 5th sealing ring is sheathed on described plug, and the first connector offered by described second urceolus, and described plug coupling is fixed on described first connector.
9. sandblaster as claimed in claim 1, it is characterized in that, the inwall of described connecting axle establishes limited step; When described WELDING STUDS fracture, described sealing shroud slides along described first outer tube inner wall, stops sliding until described sealing shroud is connected to described limited step.
10. sandblaster as claimed in claim 1, it is characterized in that, annular slot is offered in the first end periphery of described sealing shroud, and the first end of described first urceolus runs through offers the second connector, and described WELDING STUDS is connected to described annular slot through described second connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410374175.9A CN105317416B (en) | 2014-07-31 | 2014-07-31 | A kind of sanding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410374175.9A CN105317416B (en) | 2014-07-31 | 2014-07-31 | A kind of sanding machine |
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| Publication Number | Publication Date |
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| CN105317416A true CN105317416A (en) | 2016-02-10 |
| CN105317416B CN105317416B (en) | 2017-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410374175.9A Active CN105317416B (en) | 2014-07-31 | 2014-07-31 | A kind of sanding machine |
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| CN (1) | CN105317416B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422075A (en) * | 2014-08-26 | 2016-03-23 | 中国石油天然气股份有限公司 | Sand blast device |
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| CN103726819A (en) * | 2013-12-27 | 2014-04-16 | 中国石油大学(华东) | Method of low-temperature gas-assisted coalbed methane fracturing technology |
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| CN2895732Y (en) * | 2006-04-21 | 2007-05-02 | 中国石油天然气股份有限公司 | Novel hydraulic jetter |
| US20090032255A1 (en) * | 2007-08-03 | 2009-02-05 | Halliburton Energy Services, Inc. | Method and apparatus for isolating a jet forming aperture in a well bore servicing tool |
| CN103429845A (en) * | 2011-01-17 | 2013-12-04 | 恩弗拉卡公司 | Method for fracturing a formation using a fracturing fluid mixture |
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| CN105422075A (en) * | 2014-08-26 | 2016-03-23 | 中国石油天然气股份有限公司 | Sand blast device |
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| Publication number | Publication date |
|---|---|
| CN105317416B (en) | 2017-10-17 |
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