CN210798926U - Descaling device for sleeve - Google Patents
Descaling device for sleeve Download PDFInfo
- Publication number
- CN210798926U CN210798926U CN201921848864.3U CN201921848864U CN210798926U CN 210798926 U CN210798926 U CN 210798926U CN 201921848864 U CN201921848864 U CN 201921848864U CN 210798926 U CN210798926 U CN 210798926U
- Authority
- CN
- China
- Prior art keywords
- main body
- descaling
- holes
- casing
- communicated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Cleaning By Liquid Or Steam (AREA)
Abstract
A descaling device for a sleeve comprises a main body, a descaling roller cone, a positioning pin and a nozzle, wherein the descaling roller cone is positioned in a groove of the main body through the positioning pin; the main body is provided with a plurality of nozzles, the nozzles are communicated with the flow guide holes, and the flow guide holes are communicated with the water holes on the upper part of the main body. The nozzle is made of erosion-resistant alloy materials and is positioned on the main body in a welding mode. The flow guide holes are square holes, polygonal holes or other special-shaped holes. The guide tip of the lower part of the main body entering the well is a cone or a round head or a screw thread, and the guide tip is not directly or indirectly communicated with the water hole and the diversion hole on the upper part of the main body. The upper screw thread of the main body is oil pipe oil. The utility model discloses a scale removal pattern of mechanical scale removal number water jet mode combination, the scale removal is efficient, and the scale removal is effectual. The descaling is thorough, and the casing is not damaged in the descaling process.
Description
Technical Field
The utility model provides a sheathed tube scale removal device belongs to the supporting instrument technical field of oil field well workover for the sleeve pipe scale removal.
Background
After the oil field casing pipe is used for a long time, the inner wall of the casing pipe of some wells can be coated with a layer of scale due to the influence of the mineralization degree of the stratum, so that the inner diameter of the casing pipe is reduced, and the normal use performance of the casing pipe is influenced.
At present, the scale removal mode of an oil field is more, and a high-pressure hydraulic jet mode is adopted for scale removal; the drill bit carries out descaling under the rotating power of the screw drill; descaling by lifting and placing the pipe column by adopting a special descaling tool; and (4) acid washing and descaling. The first two descaling modes have low descaling efficiency and high construction cost, the third descaling mode is incomplete, and the fourth descaling mode damages the sleeve.
Disclosure of Invention
The utility model aims at solving the problems that the descaling of the prior casing descaling device is not thorough and the casing is damaged in the descaling process, and providing a casing descaling device.
A descaling device for a sleeve comprises a main body, a descaling roller cone, a positioning pin and a nozzle, wherein the descaling roller cone is positioned in a groove of the main body through the positioning pin; the main body is provided with a plurality of nozzles, the nozzles are communicated with the flow guide holes, and the flow guide holes are communicated with the water holes on the upper part of the main body.
The nozzle is made of erosion-resistant alloy materials and is positioned on the main body in a welding mode.
The flow guide holes are square holes, polygonal holes or other special-shaped holes.
The guide tip of the lower well entering part of the main body is a cone or a round head or a screw thread, and the guide tip is not directly or indirectly communicated with the water hole and the diversion hole on the upper part of the main body.
The upper screw thread of the main body is oil pipe oil.
The utility model discloses a working process:
the device is connected to the lowest part of a workover string, after the device is put into a well, the descaling wheels rotate along with resistance to extrude scale in the diameter, the scale on the inner wall of the sleeve is extruded and damaged under the action of extrusion force of the inclined teeth of the descaling wheels, the descaling wheels are multiple, the axial projection of the main body covers the whole circumference, and the outer diameter of the descaling wheels is slightly smaller than the inner diameter of the sleeve, so that the scale on the inner wall of the sleeve is extruded. Because the inner wall of the extruded descaling casing is rough and even has a small amount of residual descaling, high-pressure fluid is sprayed into the pipe column simultaneously in the descaling process, the high-pressure fluid is sprayed out from the nozzles, the plurality of descaling nozzles cover the whole circumference along the axial projection of the main body, and the high-pressure spraying is carried out on the inner wall of the casing, so that the descaling of the inner wall of the casing is completely removed, most of the removed descaling is carried out of a shaft by the sprayed fluid, and the descaling is clean and thorough.
The beneficial effects of this embodiment:
after the scale is removed by adopting the form of lifting the pipe column, the device is adopted to wash the settled scale at the lower part of the sleeve, the settled scale and sand at the bottom of the sleeve can be washed out of the sleeve, and the operation cost and the well occupying time for washing the pipe column once are saved. The descaling is thorough, and the casing is not damaged in the descaling process.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Fig. 3 is a sectional view taken along line B-B in fig. 1.
Fig. 4 is a cross-sectional view taken along line C-C of fig. 1.
Wherein: 1-a body; 11-a radial slot; 12 water holes; 13-slotting; 14-diversion holes; 15 a guide tip; 2-a cone; 21-helical teeth; 3-a pin shaft; 4-a nozzle.
Detailed Description
As shown in fig. 1, 2, 3 and 4, the descaling device for the casing comprises a main body 1, a descaling cone 2, a positioning pin 3 and a nozzle 4, wherein the descaling cone 2 is positioned in a slot 13 of the main body 1 through the positioning pin 3 by the descaling cone 2; the main body 1 is provided with a plurality of nozzles 4, the nozzles 4 are communicated with a flow guide hole 14, and the flow guide hole 14 is communicated with a water hole 12 on the upper part of the main body 1.
The nozzle 4 is made of erosion-resistant alloy materials and is positioned on the main body 1 in a welding mode.
The diversion holes 14 are square holes, polygonal holes or other special-shaped holes.
The guide tip 15 of the lower part of the main body 1 entering the well is a cone or a round head or a screw thread, and the guide tip 15 is not directly or indirectly communicated with the water hole 12 and the diversion hole 14 on the upper part of the main body 1.
The upper screw thread of the main body 1 is oil pipe oil.
The working process of the embodiment:
the device is connected to the lowest part of a workover string, after the device is put into a well, the descaling wheels rotate along with resistance to extrude scale in the diameter, the scale on the inner wall of the sleeve is extruded and damaged under the action of extrusion force of the inclined teeth of the descaling wheels, the descaling wheels are multiple, the axial projection of the main body covers the whole circumference, and the outer diameter of the descaling wheels is slightly smaller than the inner diameter of the sleeve, so that the scale on the inner wall of the sleeve is extruded. Because the inner wall of the extruded descaling casing is rough and even has a small amount of residual descaling, high-pressure fluid is sprayed into the pipe column simultaneously in the descaling process, the high-pressure fluid is sprayed out from the nozzles, the plurality of descaling nozzles cover the whole circumference along the axial projection of the main body, and the high-pressure spraying is carried out on the inner wall of the casing, so that the descaling of the inner wall of the casing is completely removed, most of the removed descaling is carried out of a shaft by the sprayed fluid, and the descaling is clean and thorough.
Claims (5)
1. A sheathed tube scale removal device which characterized in that: the descaling device comprises a main body (1), a descaling cone (2), a positioning pin (3) and a nozzle (4), wherein the descaling cone (2) is positioned in a slot (13) of the main body (1) through the positioning pin (3); a plurality of nozzles (4) are arranged on the main body (1), the nozzles (4) are communicated with the diversion holes (14), and the diversion holes (14) are communicated with the water holes (12) on the upper part of the main body (1).
2. A casing descaling device according to claim 1, wherein: the nozzle (4) is made of erosion-resistant alloy materials and is positioned on the main body (1) in a welding mode.
3. A casing descaling device according to claim 1, wherein: the diversion holes (14) are square holes or polygonal holes.
4. A casing descaling device according to claim 1, wherein: the guide tip (15) of the lower part of the main body (1) entering the well is a cone or a round head or a screw thread, and the guide tip (15) is not directly or indirectly communicated with the water hole (12) and the flow guide hole (14) on the upper part of the main body (1).
5. A casing descaling device according to claim 1, wherein: the upper screw thread of the main body (1) is oil pipe oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921848864.3U CN210798926U (en) | 2019-10-31 | 2019-10-31 | Descaling device for sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921848864.3U CN210798926U (en) | 2019-10-31 | 2019-10-31 | Descaling device for sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210798926U true CN210798926U (en) | 2020-06-19 |
Family
ID=71240875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921848864.3U Active CN210798926U (en) | 2019-10-31 | 2019-10-31 | Descaling device for sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210798926U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961599A (en) * | 2021-02-24 | 2022-08-30 | 中国石油天然气集团有限公司 | Descaling device for hydraulic jet casing |
-
2019
- 2019-10-31 CN CN201921848864.3U patent/CN210798926U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961599A (en) * | 2021-02-24 | 2022-08-30 | 中国石油天然气集团有限公司 | Descaling device for hydraulic jet casing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202007640U (en) | Fractured formation corer driven by spiral drilling rig | |
| CN206816208U (en) | Coal bed gas horizontal well rotating jet well-flushing shower nozzle | |
| CN207332794U (en) | Well washing tool | |
| CN104863531B (en) | A kind of well-flushing limit tacho-pulse formula shower nozzle | |
| CN210798926U (en) | Descaling device for sleeve | |
| CN202731793U (en) | Sand washing and blockage removing tool in sleeve | |
| CN107724998B (en) | Telescopic controllable sleeve cleaning tool for scraper | |
| CN111535760A (en) | Positive and negative circulation scraping and washing tool and using method thereof | |
| CN201687420U (en) | Rotary injection tool applicable to borehole operation in oil and gas field | |
| CN202325323U (en) | underground operation tool integrated with sand washing, paraffin scraping, sealing and separating | |
| CN201705260U (en) | Hydraulic jet blockage removing device | |
| CN203050571U (en) | High-pressure rotational flow blockage removing process pipe column for horizontal well | |
| CN202832313U (en) | Novel oil pipe drill-through washing device | |
| CN108060898B (en) | Self-cleaning desander | |
| CN203961914U (en) | A kind of taper sand washing pipeline scraper | |
| CN216446893U (en) | Geothermal well washing device | |
| CN203271678U (en) | Combined tapered mill for descaling and drifting | |
| CN211448571U (en) | Drifting, well washing and sand washing integrated downhole operation tool | |
| CN210530774U (en) | Combined type injection tool for descaling of underground high-pressure water jet casing | |
| CN201544128U (en) | Hydraulic sand-blasting cutter | |
| CN210217657U (en) | Efficient casing cleaner | |
| CN104499995A (en) | Method and device for cleaning well bottom old casing tie-back portion periphery | |
| CN112761555B (en) | Well dredging, well flushing and sand flushing integrated downhole operation tool and operation method | |
| CN210858609U (en) | Impact rotary reaming type guide shoe device | |
| CN204754873U (en) | Belt cleaning device is scraped to sleeve pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |