CN204457712U - Sleeve type hydraulic ejector - Google Patents
Sleeve type hydraulic ejector Download PDFInfo
- Publication number
- CN204457712U CN204457712U CN201420796984.4U CN201420796984U CN204457712U CN 204457712 U CN204457712 U CN 204457712U CN 201420796984 U CN201420796984 U CN 201420796984U CN 204457712 U CN204457712 U CN 204457712U
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- Prior art keywords
- sleeve
- ejector
- ejector body
- type hydraulic
- pressure cap
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- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
The utility model provides a kind of sleeve type hydraulic ejector, comprises ejector body and sleeve base; Ejector body and sleeve base are hollow body, the first end of ejector body and the first end of sleeve base one-body molded, namely ejector body and sleeve base are structure as a whole, effectively can reduce coaxiality error, and need not be threaded between ejector body and sleeve base, fracturing fluid can be avoided to leak from connection of thread, reduce leakage point; In addition, the first end internal diameter of ejector body is equal with the first end internal diameter of sleeve base, the endoporus of hydraulic ejector is overall through-hole structure, effectively reduce manufacture difficulty, the accuracy guarantee hydraulic ejector coaxiality of inner hole of lathe itself can be relied on simultaneously, thus ensure that sliding sleeve can smooth opening.
Description
Technical field
The utility model relates to hydraulic jetting fracturing instrument, particularly relates to a kind of sleeve type hydraulic ejector, belongs to petroleum industry oil-gas field fracturing renovation technique field
Background technology
In petroleum industry, hydro-jet fracturing technology technology is the novel storey increase design measure of a kind of beam hole, pressure break, isolation integration, is applicable to the storey increase design of Low permeable oil and gas reservoirs straight well, horizontal well.It is accurate that it makes seam position, can implement staged fracturing, can save the activity duration without the need to mechanical packing device, reduces operating risk.At present, be used widely in the oil gas field transformation at home and abroad of this technology, become the Important Action of Efficient Development Low permeable oil and gas reservoirs.
Hydraulic ejector is the vitals in hydro-jet fracturing technology, is divided into direct injection hydraulic ejector and sleeve type hydraulic ejector.Direct injection hydraulic ejector fracturing fluid directly penetrates from pressure cap hole after entering ejector, can only carry out single hop fracturing reform when not dragging tubing string; Sleeve type hydraulic ejector, by stuff, is cut off pin, sliding sleeve and steel ball is together fallen in sleeve base, and to open top fluidic channel, the lower passage of shutoff simultaneously, fracturing fluid penetrates the perforation and fracturing reform that carry out this interval from top fluidic channel.By arranging multistage sleeve type hydraulic ejector on process pipe string, adopting the mode of pitching step by step, the fracturing reform to different interval can be realized.
At present, ejector body and the sleeve base of conventional sleeve type hydraulic ejector are Split type structure.Fig. 1 is the structural representation of existing sleeve type hydraulic ejector, as shown in Figure 1, this sleeve type hydraulic ejector comprises ejector body 11 and sleeve base 12, ejector body 11 specifically comprises steel ball 13, sliding sleeve 14, shear pin 15, nozzle 16, pressure cap 17, ejector body 11 and sleeve base 12 are provided with screw thread 18, ejector body 11 and sleeve base 12 split design, and are together by a threaded connection.After the sleeve type hydraulic ejector assembled is sent to predetermined pressure break position by oil pipe, the steel ball 13 dropped into is pressurizeed, cut off shear pin 15, steel ball 13 promotes sliding sleeve and to slide to for 14 times in sleeve base 12 (as shown in Figure 2, Fig. 2 is that existing sleeve type hydraulic ejector sliding sleeve slides downwards is to position view during sleeve base), open nozzle 16, fracturing fluid carries out hydraulic jetting fracturing from nozzle 16 injection.
, there are problems in actual use in the sleeve type hydraulic ejector of this split-type design of the prior art.Such as, the processing request of this Split type structure to split part is higher, and after ejector body 11 and sleeve base 17 assemble, both axis need on same straight line, to ensure that sliding sleeve 13 can fall in sleeve base 17 smoothly; And ejector body 11 and sleeve base 17 process endoporus and connecting thread respectively, coaxiality error may be there is in process, and the coaxiality error of finished product is difficult to measure, likely there is the phenomenon of internal diameter malalignment in ejector body 11 and sleeve base 17, thus causes sliding sleeve 13 can not smooth opening after assembling.
Utility model content
For the above-mentioned defect of prior art, the utility model provides a kind of Novel sliding shell type hydraulic ejector, can reduce foozle, ensures that sliding sleeve can smooth opening simultaneously.
The utility model provides a kind of sleeve type hydraulic ejector, comprises ejector body and sleeve base;
Ejector body and sleeve base are hollow body;
The first end of ejector body and the first end of sleeve base one-body molded, the internal diameter of the first end of ejector body is equal with the internal diameter of the first end of sleeve base.
In an embodiment of the present utility model, ejector body comprises steel ball, shear pin, sliding sleeve, nozzle and pressure cap; Ejector body offers pressure cap hole, nozzle is fixed in pressure cap hole by pressure cap; Sliding sleeve is thin-wall circular tubular, is fixed in ejector body by shear pin, and the position slided in ejector body is relative with the position in pressure cap hole.
In an embodiment of the present utility model, pressure cap is provided with screw thread in hole, and pressure cap is fixed in pressure cap hole by screw thread.
In an embodiment of the present utility model, the endoporus of pressure cap comprises interior hexagonal hole and taper hole; Interior hexagonal hole is used for dismounting pressure cap; Taper hole is for installing nozzle.
In an embodiment of the present utility model, the two ends of sliding sleeve are respectively arranged with sealing ring.
In an embodiment of the present utility model, steel ball and sliding sleeve match, for being pushed in sleeve base along ejector body inwall by sliding sleeve.
In an embodiment of the present utility model, the second end of ejector body is provided with internal thread, for connecting the first oil pipe.
In an embodiment of the present utility model, the second end of sleeve base is provided with external screw thread, for connecting the second oil pipe.
In an embodiment of the present utility model, it is frustum structure between the internal thread of ejector body and the first end of sliding sleeve, the diameter of the first end of frustum structure is greater than the diameter of the second end, and the diameter of the first end of frustum structure equals the internal diameter of the first end of ejector body.
In an embodiment of the present utility model, the second end of sleeve base is provided with position limiting structure; Position limiting structure slides into position in sleeve base for limiting sliding sleeve.
The sleeve type hydraulic ejector that the utility model provides, ejector body and sleeve base are hollow body, the first end of ejector body and the first end of sleeve base one-body molded, namely ejector body and sleeve base are structure as a whole, can effectively reduce machine difficulty, and need not be threaded between ejector body and sleeve base, fracturing fluid can be avoided to leak from connection of thread, reduce leakage point; In addition, because the internal diameter of the first end of ejector body is equal with the internal diameter of the first end of sleeve base, the endoporus of hydraulic ejector is overall through-hole structure, therefore foozle is effectively reduced, the accuracy guarantee hydraulic ejector coaxiality of inner hole of lathe itself can be relied on simultaneously, thus ensure that sliding sleeve can smooth opening.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing sleeve type hydraulic ejector;
Fig. 2 is that existing sleeve type hydraulic ejector sliding sleeve slides downwards is to position view during sleeve base;
Fig. 3 is the structural representation of sleeve type hydraulic ejector embodiment one of the present utility model;
Fig. 4 is the structural representation of sleeve type hydraulic ejector embodiment two of the present utility model;
Fig. 5 is the structural representation of pressure cap and nozzle in sleeve type hydraulic ejector of the present utility model;
Fig. 6 is that sleeve type hydraulic ejector sliding sleeve slides downwards of the present utility model is to position view during sleeve base;
Fig. 7 is the structural representation of sleeve type hydraulic ejector embodiment three of the present utility model.
Description of reference numerals:
11-ejector body; 12-sleeve base;
13-steel ball; 14-sliding sleeve;
15-shear pin; 16-nozzle;
17-pressure cap; 18-screw thread;
1-ejector body; 2-sleeve base;
The first end of 101-ejector body; 102-steel ball;
103-shear pin; 104-sliding sleeve;
105-nozzle; 106-pressure cap;
107-pressure cap hole; 108-sealing ring;
Second end of 109-ejector body; 110-internal thread;
111-cone structure;
The first end of 201-sleeve base; Second end of 202-sleeve base;
203-position limiting structure; 204-external screw thread.
Detailed description of the invention
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 3 is the structural representation of sleeve type hydraulic ejector embodiment one of the present utility model, as shown in Figure 3, the sleeve type hydraulic ejector that the present embodiment provides comprises: ejector body 1 and sleeve base 2, ejector body 1 and sleeve base 2 are hollow body, the first end 101 of ejector body 1 is one-body molded with the first end 201 of sleeve base 2, and the internal diameter of ejector body 1 is equal with the internal diameter of sleeve base 2.
Concrete, ejector body 1 can be existing various types of hydraulic ejector rigid body, the first end 101 of ejector body 1 and the first end 201 of sleeve base 2 are to add man-hour one-body molded, and namely ejector body 1 and sleeve base 2 are structure as a whole, and need not be threaded between the two; The internal diameter of the first end 101 of ejector body 1 is equal with the internal diameter of the first end 201 of sleeve base 2, and the endoporus of hydraulic ejector is overall through-hole structure, thus ensures that the interior axially bored line of ejector body 1 and sleeve base 2 is on same straight line.
It should be noted that, in the present embodiment, in order to the annexation of ejector body 1 and sleeve base 2 is described, the first end 101 of ejector body 1 is separated with the first end 201 of sleeve base 2 and illustrates, those skilled in the art can know, when in the present embodiment, ejector body 1 and sleeve base 2 are structure as a whole, the first end 101 of ejector body 1 is actually same port with the first end 201 of sleeve base 2.
After the sleeve type hydraulic ejector of the present embodiment is arranged on oil pipe, by oil pipe, the sleeve type hydraulic ejector assembled is sent to predetermined pressure break position, then in oil pipe, inject fracturing fluid, the inwall slided over along ejector body 1 under of the fracturing fluid effect slips in sleeve base.Because ejector body 1 and sleeve base 2 are structure as a whole, the endoporus of ejector body 1 and the endoporus of sleeve base 2 are overall through hole, there is not coaxiality error, when sliding sleeve slips in sleeve base 2 along the inwall of ejector body 1, can not occur that sliding sleeve cannot slip into the phenomenon of sleeve base 2 smoothly because of the endoporus malalignment of the endoporus of ejector body 1 and sleeve base 2.
The sleeve type hydraulic ejector that the utility model provides, ejector body and sleeve base are hollow body, the first end of ejector body and the first end of sleeve base one-body molded, namely ejector body and sleeve base are structure as a whole, effectively can reduce foozle, and need not be threaded between ejector body and sleeve base, fracturing fluid can be avoided to leak from connection of thread, reduce leakage point; In addition, because the internal diameter of the first end of ejector body is equal with the internal diameter of the first end of sleeve base, the endoporus of hydraulic ejector is overall through-hole structure, therefore manufacture difficulty is effectively reduced, the accuracy guarantee hydraulic ejector coaxiality of inner hole of lathe itself can be relied on simultaneously, thus ensure that sliding sleeve can smooth opening.
Fig. 4 is the structural representation of sleeve type hydraulic ejector embodiment two of the present utility model, and on the basis of above-described embodiment, as shown in Figure 4, above-mentioned ejector body 1 comprises steel ball 102, shear pin 103, sliding sleeve 104, nozzle 105 and pressure cap 106; Wherein, ejector body 1 offers pressure cap hole 107, nozzle 105 is fixed on pressure cap hole 107 by pressure cap 106.
Concrete, above-mentioned steel ball 102 matches, for being pushed in sleeve base 2 along ejector body 1 inwall by sliding sleeve 104 with sliding sleeve 104.Steel ball 102 can be hollow steel ball, and in another embodiment of the present utility model, optionally, steel ball 102 also can be the spheroid of other materials, such as resin balls.
Above-mentioned shear pin 103 can be set to 1 as shown in Figure 4, and also can arrange 2 or 3 along sliding sleeve 104 circumference, the concrete number of shear pin 103 and position, the present embodiment does not limit, as long as can play the effect of fixing sliding sleeve 104.
Above-mentioned sliding sleeve 104 is thin-wall circular tubular, sliding sleeve 104 can slide into sleeve base in ejector body, size and the ejector body of this sliding sleeve are suitable, it is fixed in ejector body 1 by shear pin 103, and the position of sliding sleeve 104 in ejector body 1 is relative with the position in pressure cap hole 107.
In addition, can be provided with screw thread in pressure cap hole 107, pressure cap 106 is fixed in pressure cap hole 107 by this screw thread.Further, the endoporus of above-mentioned pressure cap can comprise interior hexagonal hole and taper hole, can be specifically shown pressure cap and the structural representation of nozzle see Fig. 5.Optionally, the endoporus of pressure cap 106 is outer little interior large stepped ramp type, and the aperture of outer end can be interior hexagonal hole, can facilitate the installation and removal of pressure cap 106, and the outer end aperture of pressure cap 106 endoporus also can be other shapes, as long as can dismounting pressure cap 106; The macropore of the inner of pressure cap 106 endoporus is taper hole structure, for installing nozzle 105.
Accordingly, the external diameter of nozzle 105 is cone structure, the taper hole of pressure cap 106 has identical tapering with the male cone (strobilus masculinus) of nozzle 105, be arranged in pressure cap hole 107 by screw thread after nozzle 105 is bonding with pressure cap 106, thus nozzle 105 is fixed in ejector body 1, when carrying out jetting, the backwash pressure that fracturing fluid is produced by nozzle 105 pairs of nozzles 105 can be born by the conical surface of pressure cap 106 internal taper hole, thus the impact force of fracturing fluid to nozzle 105 can be reduced, the application life of prolonging nozzle 105.
Optionally, pressure cap hole 107 can be symmetrical arranged after 2 up and down as shown in Figure 4 in ejector body 1,2 are symmetrical arranged again before and after 90-degree rotation, also in ejector body 1, circumference 3 can evenly be arranged, can also arrange in the diagram on the basis in 4 pressure cap holes 107, then be symmetrical arranged 2 up and down in ejector body 1, the design attitude that pressure cap hole 107 is concrete and number, the present embodiment does not limit, as long as can carry out hydraulic jetting fracturing.
Further, in the present embodiment, the second end 202 of sleeve base 2 is provided with position limiting structure 203, slides into position in sleeve base 2 for limiting sliding sleeve 104.Concrete, the internal diameter of the second end 202 of sleeve base 2 is less than the internal diameter of the first end 201 of sleeve base 2, position limiting structure 203 can be large outer little frustum structure in as shown in Figure 4, also can be that angle is step-like always, concrete shape the present embodiment does not limit, as long as can play the position of restriction sliding sleeve 104.
The hydraulic ejector related in the present embodiment operationally, its concrete implementation can be: by the internal thread 110 of ejector body 1 and the external screw thread 204 of sleeve base 2, sleeve type hydraulic ejector is arranged on oil pipe, then the sleeve type hydraulic ejector assembled is sent to predetermined pressure break position by oil pipe, steel ball 102 is dropped into from well head, backward oil pipe in inject fracturing fluid, the steel ball 102 dropped into is pressurizeed, cut off shear pin 103, steel ball 102 promotes sliding sleeve and to slide to for 104 times in sleeve base 2 (as shown in Figure 6, Fig. 6 is that sleeve type hydraulic ejector sliding sleeve slides downwards of the present utility model is to position view during sleeve base), expose nozzle 105, the passage of shutoff oil pipe bottom simultaneously, fracturing fluid carries out hydraulic jetting fracturing from nozzle 105 injection.
It should be noted that, ejector of the present utility model, because ejector body 1 and sleeve base 2 are structure as a whole, the endoporus of ejector body 1 and the endoporus of sleeve base 2 are overall through hole, there is not coaxiality error, when sliding sleeve slips in sleeve base 2 along the inwall of ejector body 1, can not be excessive and occur that sliding sleeve cannot slip into the phenomenon of sleeve base 2 smoothly because of the coaxiality of inner hole error of the endoporus of ejector body 1 and sleeve base 2.
The sleeve type hydraulic ejector that the utility model provides, ejector body and sleeve base are structure as a whole, and effectively can reduce foozle, and need not be threaded between ejector body and sleeve base, and fracturing fluid can be avoided to leak from connection of thread, reduce leakage point; In addition, because the endoporus of hydraulic ejector is overall through-hole structure, therefore effectively reduce manufacture difficulty, the accuracy guarantee hydraulic ejector coaxiality of inner hole of lathe itself can be relied on simultaneously, thus ensure that sliding sleeve can smooth opening; In addition, pressure cap and nozzle, by conical surface adhesive, can reduce the impact force of fracturing fluid to nozzle, the application life of prolonging nozzle.
Fig. 7 is the structural representation of sleeve type hydraulic ejector embodiment three of the present utility model, as shown in Figure 7, on above-mentioned basis embodiment illustrated in fig. 4, in order to avoid pressure release, is also provided with sealing ring in the present embodiment on sliding sleeve.
Concrete, in the present embodiment, the two ends of sliding sleeve 104 are respectively arranged with sealing ring 108, prevent fracturing fluid from flowing out build-up of pressure by the gap between sliding sleeve 104 and ejector body 1 and leak.In addition, the second end 109 of ejector body 1 can also arrange internal thread 110, and this internal thread 110 is for connecting the first oil pipe; Second end 202 of sleeve base 2 can also arrange external screw thread 204, and this external screw thread 204 is for connecting the second oil pipe.
The sleeve type hydraulic ejector that the utility model provides, arranges sealing ring by the two ends at sliding sleeve, avoids fracturing fluid and flows out build-up of pressure leakage by the gap between sliding sleeve and ejector body, thus improve ejection efficiency.
Further, on the basis of above-mentioned all embodiments, be frustum structure 111 between the internal thread 110 of ejector body 1 and the first end of sliding sleeve 104, the diameter of the first end of frustum structure 111 is greater than the diameter of the second end, and the diameter of the second end of frustum structure 111 equals the internal diameter of the first end 101 of ejector body 1, thus when installing sliding sleeve 104, by the second end 109 of ejector body 1, be fit into via frustum structure 111 in the endoporus of ejector body 1.
The sleeve type hydraulic ejector that the utility model embodiment provides in use, by the internal thread 110 of ejector body 1 and the external screw thread 204 of sleeve base 2, sleeve type hydraulic ejector is arranged on oil pipe, then the sleeve type hydraulic ejector assembled is sent to predetermined pressure break position by oil pipe, steel ball 102 is dropped into from well head, backward oil pipe in inject fracturing fluid, the steel ball 102 dropped into is pressurizeed, cut off shear pin 103, steel ball 102 promotes sliding sleeve and to slide to for 104 times in sleeve base 2 (as shown in Figure 6, Fig. 6 is that sleeve type hydraulic ejector sliding sleeve slides downwards of the present utility model is to position view during sleeve base), spill nozzle 105, the passage of shutoff oil pipe bottom simultaneously, fracturing fluid carries out hydraulic jetting fracturing from nozzle 105 injection.
The sleeve type hydraulic ejector that the utility model provides, by arranging frustum structure between the internal thread and the first end of sliding sleeve of ejector body, and the diameter of the second end of frustum structure equals the internal diameter of the first end of ejector body, thus by second end of sliding sleeve by ejector body, can enter in the endoporus of ejector body via frustum structure installment.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (10)
1. a sleeve type hydraulic ejector, is characterized in that, comprises ejector body and sleeve base;
Described ejector body and described sleeve base are hollow body;
The first end of described ejector body and the first end of described sleeve base one-body molded, the internal diameter of the first end of described ejector body is equal with the internal diameter of the first end of described sleeve base.
2. sleeve type hydraulic ejector according to claim 1, is characterized in that, described ejector body comprises steel ball, shear pin, sliding sleeve, nozzle and pressure cap;
Described ejector body offers pressure cap hole, described nozzle is fixed in described pressure cap hole by described pressure cap;
Described sliding sleeve is thin-wall circular tubular, is fixed in described ejector body by described shear pin, described in the position that slides in described ejector body relative with the position in described pressure cap hole.
3. sleeve type hydraulic ejector according to claim 2, is characterized in that, is provided with screw thread in described pressure cap hole, and described pressure cap is fixed in described pressure cap hole by described screw thread.
4. sleeve type hydraulic ejector according to claim 2, is characterized in that, the endoporus of described pressure cap comprises interior hexagonal hole and taper hole; Described interior hexagonal hole is used for pressure cap described in dismounting; Described taper hole, for installing described nozzle.
5. sleeve type hydraulic ejector according to claim 2, is characterized in that, the two ends of described sliding sleeve are respectively arranged with sealing ring.
6. sleeve type hydraulic ejector according to claim 2, is characterized in that, described steel ball and described sliding sleeve match, for being pushed in described sleeve base along described ejector body inwall by described sliding sleeve.
7. sleeve type hydraulic ejector according to claim 2, is characterized in that, the second end of described ejector body is provided with internal thread, for connecting the first oil pipe.
8. sleeve type hydraulic ejector according to claim 2, is characterized in that, the second end of described sleeve base is provided with external screw thread, for connecting the second oil pipe.
9. sleeve type hydraulic ejector according to claim 2, is characterized in that, is frustum structure between the internal thread of described ejector body and the first end of described sliding sleeve;
The first end diameter of described frustum structure is greater than the diameter of the second end of described frustum structure, and the diameter of the second end of described frustum structure equals the internal diameter of the first end of described ejector body.
10. the hydraulic ejector according to any one of claim 2-9, is characterized in that, the second end of described sleeve base is provided with position limiting structure;
Described position limiting structure slides into position in described sleeve base for limiting described sliding sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420796984.4U CN204457712U (en) | 2014-12-15 | 2014-12-15 | Sleeve type hydraulic ejector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420796984.4U CN204457712U (en) | 2014-12-15 | 2014-12-15 | Sleeve type hydraulic ejector |
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| Publication Number | Publication Date |
|---|---|
| CN204457712U true CN204457712U (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420796984.4U Expired - Fee Related CN204457712U (en) | 2014-12-15 | 2014-12-15 | Sleeve type hydraulic ejector |
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| Country | Link |
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| CN (1) | CN204457712U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320246A (en) * | 2021-10-19 | 2022-04-12 | 中海油能源发展股份有限公司 | Offshore oil field oil pipe formula water conservancy sandblast fracturing spray gun |
-
2014
- 2014-12-15 CN CN201420796984.4U patent/CN204457712U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320246A (en) * | 2021-10-19 | 2022-04-12 | 中海油能源发展股份有限公司 | Offshore oil field oil pipe formula water conservancy sandblast fracturing spray gun |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 |