CN203161114U - Hydraulic centralizer applicable to multi-stage hydraulic jet fracturing - Google Patents
Hydraulic centralizer applicable to multi-stage hydraulic jet fracturing Download PDFInfo
- Publication number
- CN203161114U CN203161114U CN 201320091695 CN201320091695U CN203161114U CN 203161114 U CN203161114 U CN 203161114U CN 201320091695 CN201320091695 CN 201320091695 CN 201320091695 U CN201320091695 U CN 201320091695U CN 203161114 U CN203161114 U CN 203161114U
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- centralizer
- elasticity
- sandpipe
- mounting groove
- centralizer body
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Abstract
The utility model relates to a hydraulic centralizer applicable to multi-stage hydraulic jet fracturing. The hydraulic centralizer comprises a centralizer body, a centralization ridge and a centralization block, wherein the centralization ridge is provided with a mounting groove, the centralization block is embedded in the mounting groove from the inside of the centralizer body, an elastic sand preventing pipe is sleeved on the inner wall of the centralizer body, and the outer wall of the elastic sand preventing pipe closes the position where the mounting groove and an inner cavity of the centralizer body are communicated. According to the hydraulic centralizer, sand in liquids cannot enter the mounting groove, the centralization block cannot be blocked by the sand, and the sand blocking risk can be effectively reduced.
Description
Technical field
The utility model relates to a kind of multi-stage water power that is applicable to and sprays the hydraulic centralizing device of pressure break, is used for the completion well stimulation of oil and gas well drilling process, relates to the design and manufacturing technology field of acid fracturing technical tool.
Background technology
Jetting segmentation renovation technique is to grow up the end of the nineties, it is the product that jetting and fracturing technique combine, this technology is beam hole, fracturing yield increasing measure technology, and one-trip string is realized the technology of horizontal well multistage construction, compare with packer, bridging plug, back-up sand, plug technology mode, efficiency of construction can be greatly improved.
In order to realize the multi-stage water power perforating and fracturing, perhaps spray the technology of the real-time pressure break of coil pipe perforation for the multi-stage water power of realizing the proppant packing, prior art all is the jetting process pipe string structure that needs to adopt the various tool serial connection basically, increase along with the oil well horizontal well jetting pressing crack construction number of plies, well depth increases, the instrument that connects at the jetting process pipe string also needs corresponding increase, the increase of instrument causes the length of jetting process pipe string also increasing, therefore, connecting centralizer in tubing string also is very to need, because during horizontal well jetting pressing crack construction, need bigger pump pressure, will tremble at big pump pressure lower tubular column, make tubing string depart from the center line of well, if the construction failure takes place to cause in this situation, so, in the pipe string, needing to connect centralizer, its main purpose is in order to make tubing string stablize tubing string in work progress, keep tubing string at the center of well, reach the high-quality that improves the jetting pressing crack construction.
The centralizer of prior art also has last lower contact, setting upright rib is fixedly installed on the body, in practice of construction, owing between the maximum outside diameter of centralizer and the sleeve pipe certain clearance is arranged, so when pump pressure increases, can produce bigger vibration, this vibration can bring bigger inaccuracy to the accurate position of jetting, the serious damage that also can cause tubing string because of vibration; The centralizer that has set upright the wiper block that rib arranges can be outwards outstanding under the pipe internal pressure, reach with wiper block tightly squeeze on casing wall, realize not trembleing the purpose of setting upright, the disclosed a kind of centralizer of China Patent No. " CN201120355515.5 " for example, open day is on 08 22nd, 2012.But, because the liquid in the pipe has gravel, enter the gap of setting upright rib and wiper block when gravel after, set upright soon and will be blocked by sand, form the sand card, cause setting upright soon and can not be released by the hydraulic pressure in the pipe, so just do not reach and do not tremble the purpose of setting upright.
Multi-stage water power at present newly developed sprays the packing process pipe string, this process pipe string can be by dragging the mode of tubing string in the multi-section multi-layer construction, first perforation and the pressure break connection that carries out three sections with spray gun and the packer of hypomere done, then to open PSK344 waterpower spray gun and packer feed pathway by the mode of pitching, shutoff packer bottom tubing string, again by the mode that drags tubing string three intervals of constructing again, so just can bore for one time six sections are constructed, simplified and gone into well casing post number of times; For the once success that guarantees that multi-stage water power sprays, centralizer is the important step that guarantees that tubing string does not tremble in the work progress, therefore, a plurality of centralizers have been connected in this tubing string, to guarantee the reliability of construction, still, if in work progress, the centralizer that connects has one the sand card takes place, and will influence quality, progress and the safety of whole construction.
Summary of the invention
The purpose of this utility model is to overcome the problems referred to above that existing centralizer exists, provide a kind of multi-stage water power that is applicable to spray the hydraulic centralizing device of pressure break, the utility model can not enter in the mounting groove grit in the liquid, and wiper block can not blocked by sand, can effectively reduce sand card risk.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of multi-stage water power that is applicable to sprays the hydraulic centralizing device of pressure break, comprise centralizer body, set upright rib and wiper block, set upright and have mounting groove on the rib, wiper block outwards embeds in centralizer body and is arranged on the mounting groove, it is characterized in that: be arranged with the anti-sandpipe of elasticity on the described centralizer body inwall, and elasticity is prevented the place that is communicated with of closed front mounting groove with the centralizer body inner chamber of sandpipe.
The length of the anti-sandpipe of described elasticity is communicated with the diameter at place greater than mounting groove and centralizer body inner chamber, and elasticity prevents that the outer wall of sandpipe is connected with the centralizer body inner thread.
The anti-sandpipe outer wall of described wiper block and elasticity closely cooperates.
The described external diameter of rib of setting upright is greater than the external diameter of centralizer body.
Adopt advantage of the present utility model to be:
One, in the utility model, be arranged with the anti-sandpipe of elasticity on the described centralizer body inwall, and the closed front mounting groove of the anti-sandpipe of elasticity and the place that is communicated with of centralizer body inner chamber, adopt this structure, under the pressure effect of intraluminal fluid power, promote the anti-sandpipe of elasticity, because elasticity sand control pipe is flexible, therefore under pressure, the anti-sandpipe of elasticity is expanded in mounting groove, outwards promote wiper block, reach the purpose of hydraulic pressure seat card, and because elasticity is prevented the place that is communicated with of closed front mounting groove with the centralizer body inner chamber of sandpipe, make the grit in the liquid can not enter in the mounting groove, wiper block can not blocked by sand, can effectively reduce sand card risk.
Two, in the utility model, the length of the anti-sandpipe of described elasticity is communicated with the diameter at place greater than mounting groove and centralizer body inner chamber, when this structure is expanded the anti-sandpipe of elasticity in the mounting groove under the effect of intraluminal fluid pressure, the anti-sandpipe two ends of elasticity and centralizer body inwall also can be connected firmly, guaranteed the reliability of elasticity sand control duct occlusion connection place, and the outer wall of the anti-sandpipe of elasticity is connected with the centralizer body inner thread, employing is threaded and not only is easy for installation and removal, but also is convenient to adjust the anti-position of sandpipe in centralizer body of elasticity.
Three, in the utility model, the anti-sandpipe outer wall of described wiper block and elasticity closely cooperates, and adopts this structure, when the expansion in the mounting groove of the anti-sandpipe of elasticity hour also can guarantee outwards to promote wiper block, reaches the purpose of hydraulic pressure seat card.
Four, in the utility model, the described external diameter of rib of setting upright is greater than the external diameter of centralizer body, this structure has remedied the gap between centralizer and the sleeve pipe, finish the function that starts grappling, reach the purpose of hydraulic pressure seat card, therefore also just reduce the vibration of tubing string in work progress, can both play important effect to the efficient that improves packer application life and abrasive perforating.
Description of drawings
Fig. 1 is the utility model structural representation
Be labeled as among the figure: 1, centralizer body, 2, set upright rib, 3, wiper block, 4, the anti-sandpipe of elasticity, 5, mounting groove.
The specific embodiment
Embodiment 1
A kind of multi-stage water power that is applicable to sprays the hydraulic centralizing device of pressure break, comprise centralizer body 1, set upright rib 2 and wiper block 3, set upright and have mounting groove 5 on the rib 2, wiper block 3 outwards embeds in centralizer body 1 and is arranged on the mounting groove 5, be arranged with the anti-sandpipe 4 of elasticity on described centralizer body 1 inwall, and elasticity is prevented the place that is communicated with of closed front mounting groove 5 with centralizer body 1 inner chamber of sandpipe 4.The material of the anti-sandpipe 4 of elasticity does not have specific (special) requirements, adopts existing elastomeric material to get final product.
Preferred embodiment of the present utility model is, the length of the anti-sandpipe 4 of described elasticity is communicated with the diameter at place greater than mounting groove 5 and centralizer body 1 inner chamber, and elasticity prevents that the outer wall of sandpipe 4 is connected with centralizer body 1 inner thread.
Another preferred embodiment of the present utility model is, described wiper block 3 closely cooperates with anti-sandpipe 4 outer walls of elasticity, but is not limited to closely cooperate, and also certain clearance can be arranged, as long as in the time of guaranteeing that the anti-sandpipe 4 of elasticity is expanded in the mounting groove, can be with wiper block 3 extrapolated getting final product.
Another preferred embodiment of the present utility model is that the described external diameter of rib 2 of setting upright reduces the gap between centralizer and the sleeve pipe greater than the external diameter of centralizer body 1.
Another preferred embodiment of the present utility model is that the anti-sandpipe 4 of elasticity adopts the structure device of three wings sand control grappling, can effectively improve working security, has prolonged the tubing string life-span.
Operating principle of the present utility model is: under the pressure effect of intraluminal fluid power, outwards promote the anti-sandpipe of elasticity, outwards promote wiper block by the anti-sandpipe of elasticity again, make wiper block outwards mobile, the pipe internal pressure is more big, outwards the dynamics that promotes is also just more big, wiper block is released, realized grappling, simultaneously because the deadening of the anti-sandpipe of elasticity, grit in the liquid can not enter in the mounting groove, guarantees to set upright soon can not blocked by sand.
Connection of the present utility model: when needs connect centralizer, earlier with each parts inspection and clean up, particularly be arranged on and set upright the mounting groove 5 that wiper block 3 is installed in rib 2 stage casings, clean up, avoid taking place the blocked portion phenomenon, during installation, earlier wiper block 3 is outwards put into mounting groove in centralizer body 1, set upright the wiper block mounting groove that arranges in the face of accurate, for sand control, the gap can be less, if feel tight a little when putting into, tapping from inside to outside can be packed wiper block 3 into; The elasticity of packing in centralizer body 1 is then prevented sandpipe 4, and the interior circle of the anti-sandpipe 4 of elasticity and centralizer body 1 is by screwed connection.
Embodiment 3
The field conduct example: western somewhere carrying out horizontal well construction at home, the construction layer position is long 3 layers of Triassic Yanchang Formation, schematic design is distinguished adding ceramic 7m for 8 speckings of horizontal segment are carried out the jetting sand fracturing
3+ 10m
3+ 12m
3+ 15m
3+ 15m
3+ 12m
3+ 10m
3+ 7m
3, operating tool string adopts the efficient pipe string combination of horizontal well: 2 7/8 〞 external upset tubing+hydraulic type safety joint+PSK344-110 sprays packer+sliding sleeve and is located joint+one-level waterpower spray gun+K344-108 packer+ball-and-seat+eye pipe+plug.
Earlier with No. 1 spray gun this well four sections (floor) has been carried out the jetting pressing crack construction, after the pressurization, the centralizer on the tubular column structure string is grappling smoothly all, because sand card phenomenon does not take place in effectively stopping of the grit in the anti-4 pairs of liquid of sandpipe of elasticity.
In the work progress, with the one-level spray gun jetting construction is implemented in the 3rd section layer position earlier, begin normal jetting pressing crack construction then, work progress does not tremble, and illustrates that the centralizer grappling that connects is normal.This construction adopts this instrument to carry out the jetting pressure break of four sections (layers) smoothly, has finished construction task fast and effectively, shortens about 1.5 days of construction period.
Claims (4)
1. one kind is applicable to that multi-stage water power sprays the hydraulic centralizing device of pressure break, comprise centralizer body (1), set upright rib (2) and wiper block (3), set upright and have mounting groove (5) on the rib (2), wiper block (3) outwards embeds in centralizer body (1) and is arranged on the mounting groove (5), it is characterized in that: be arranged with the anti-sandpipe (4) of elasticity on described centralizer body (1) inwall, and elasticity is prevented the place that is communicated with of closed front mounting groove (5) with centralizer body (1) inner chamber of sandpipe (4).
2. the multi-stage water power that is applicable to according to claim 1 sprays the hydraulic centralizing device of pressure break, it is characterized in that: the length that described elasticity is prevented sandpipe (4) is communicated with the diameter at place greater than mounting groove (5) and centralizer body (1) inner chamber, and the outer wall of the anti-sandpipe (4) of elasticity is connected with centralizer body (1) inner thread.
3. the multi-stage water power that is applicable to according to claim 1 sprays the hydraulic centralizing device of pressure break, it is characterized in that: described wiper block (3) closely cooperates with anti-sandpipe (4) outer wall of elasticity.
4. the multi-stage water power that is applicable to according to claim 1 sprays the hydraulic centralizing device of pressure break, and it is characterized in that: the described external diameter of rib (2) of setting upright is greater than the external diameter of centralizer body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320091695 CN203161114U (en) | 2013-02-28 | 2013-02-28 | Hydraulic centralizer applicable to multi-stage hydraulic jet fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320091695 CN203161114U (en) | 2013-02-28 | 2013-02-28 | Hydraulic centralizer applicable to multi-stage hydraulic jet fracturing |
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| Publication Number | Publication Date |
|---|---|
| CN203161114U true CN203161114U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320091695 Expired - Lifetime CN203161114U (en) | 2013-02-28 | 2013-02-28 | Hydraulic centralizer applicable to multi-stage hydraulic jet fracturing |
Country Status (1)
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| CN (1) | CN203161114U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909188A (en) * | 2016-06-03 | 2016-08-31 | 上海鑫地能源科技有限公司 | Hydraulic vibration centering device and drilling method |
| CN110080696A (en) * | 2019-06-04 | 2019-08-02 | 武汉金博锐精密制造有限公司 | A kind of novel hydropower centralizer |
| CN112145148A (en) * | 2020-10-10 | 2020-12-29 | 吕楠 | Adjustable sand setting gas anchor for pumping well |
-
2013
- 2013-02-28 CN CN 201320091695 patent/CN203161114U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909188A (en) * | 2016-06-03 | 2016-08-31 | 上海鑫地能源科技有限公司 | Hydraulic vibration centering device and drilling method |
| CN105909188B (en) * | 2016-06-03 | 2018-02-09 | 上海鑫地能源科技有限公司 | The centralizer and drilling method of hydraulic vibrating |
| CN110080696A (en) * | 2019-06-04 | 2019-08-02 | 武汉金博锐精密制造有限公司 | A kind of novel hydropower centralizer |
| CN112145148A (en) * | 2020-10-10 | 2020-12-29 | 吕楠 | Adjustable sand setting gas anchor for pumping well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |