CN110894780A - Self-rotating scraping casing pipe processor for oil-water well workover - Google Patents
Self-rotating scraping casing pipe processor for oil-water well workover Download PDFInfo
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- CN110894780A CN110894780A CN201811066507.1A CN201811066507A CN110894780A CN 110894780 A CN110894780 A CN 110894780A CN 201811066507 A CN201811066507 A CN 201811066507A CN 110894780 A CN110894780 A CN 110894780A
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- spiral track
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a self-rotating scraping casing processor for oil-water well workover, which comprises an inner pipe, an upper driving sleeve, a lower driving sleeve, a rotating pipe and a scraping mechanism, wherein the rotating pipe is sleeved on the outer wall of the inner pipe, the scraping mechanism is installed on the rotating pipe, an upper driving spiral track is arranged at the upper end of the rotating pipe, a lower driving spiral track is arranged at the lower end of the rotating pipe, an upper driven spiral track is arranged at the lower end of the upper driving sleeve, the upper driving spiral track is matched with the upper driven spiral track, so that relative rotation can be generated when the upper driving spiral track is meshed with the upper driven spiral track, a lower driven spiral track is arranged at the upper end of the lower driving sleeve, and the lower driving spiral track is matched with the lower driven spiral track, so that relative rotation can be generated when the lower driving spiral track is meshed with the lower driven spiral track. The scraping block can rotate when scraping the casing, can scrape the casing in all directions, improves the quality of the scraped casing, and ensures the quality of well repair.
Description
Technical Field
The invention relates to equipment for construction of oil and water well workover operation in an oil field, in particular to a self-rotating scraping casing processor for oil and water well workover.
Background
The oil field enters the later development stage of extra-high water content, and the mineralization of produced liquid is higher along with the continuous rising of water content; the water injection well is restricted by various conditions, and the factors such as unqualified quality of injected water and the like are easy to form scale on the inner wall of the casing.
The factors causing poor cleaning condition of the inner wall of the shaft mainly include the following aspects:
1. the mineralization degree of the produced and injected water is high.
2. The oil well is waxed, and the hard wax is adhered to the inner wall of the sleeve.
3. And drilling and plugging residual cement after plugging.
Influence on oil-water wells:
1. the scale and the hard wax aggravate the corrosion degree and the corrosion speed of the sleeve, so that the pressure resistance of the sleeve is reduced, and sleeve damage phenomena such as corrosion perforation, leakage and the like of the sleeve are caused.
2. Causing the sliding seal and failure of the packer, causing invalid procedures and even engineering accidents.
3. The well tool meets the resistance and the card.
The conventional treatment means for solving the influence of the problems on the casing is to scrape the casing of the oil-water well by using a casing processor, and the problem of poor treatment effect exists in the method for scraping the casing by using the casing processor.
Application No.: 201810003474.X, published 2018-04-13 discloses a novel rotary casing scraper, which comprises a hydraulic drive assembly and a scraping cutter assembly, wherein the inner wall of the inner cylinder of the scraper is fixedly connected with a turbine, and high-pressure water flow impacts the turbine to drive the inner cylinder of the scraper to rotate so as to drive the scraping cutter assembly to rotate. Every two fork shearing rods are connected in a group through pins to form a fork shearing frame structure, and the radial and radial expansion functions of the scraper are realized through axial movement of the fork shearing frame. Six inclined holes are formed in the scraper and used for spraying high-pressure water flow in the scraping process to clean the cutter and the inner wall of the sleeve. The base is connected with the scraping cutter shell through screws, six inclined holes are formed in the lower portion of the base and used for spraying residual high-pressure water flow to pre-flush the inner barrel of the sleeve to be scraped at the lower portion of the sleeve, and scraping pretreatment is achieved. Compared with the existing sleeve scraper, the shearing fork frame has the advantages that the radial expansion function of the scraper is realized, the scraping diameter is increased, the shearing fork frame is more stable in structure, the scraping efficiency is more remarkable, the cleaning function is realized, and the scraping capacity is improved.
Application No.: 201711100079.5, published 2018-02-23 discloses a scraper telescopic and retractable casing cleaning tool, which belongs to the field of petroleum downhole tools. The scraper comprises a shell, a sleeve, a lower mandrel, an upper scraper and a lower scraper, wherein the upper mandrel is arranged in the shell, the lower mandrel is arranged on one side of the upper mandrel, the upper scraper and the lower scraper are arranged on the shell corresponding to the upper mandrel, an upper boss and a lower boss are arranged on the upper mandrel, and the upper scraper and the lower scraper are in sliding connection with the upper mandrel through the matching of the upper boss and the lower boss. The cover cleaning tool can clean the sleeve through the upper scraper and the lower scraper, and through the matching of the positioning teeth with different depths of the positioning rod, the height of the upper scraper and the lower scraper extending out in the radial direction can be controlled, so that the sleeve with different pipe diameters can be cleaned, the problem that the existing cleaning tool is inconvenient to use and cannot adapt to the requirement of the diameter change of the shaft is solved, and the cover cleaning tool has positive popularization significance.
Application No.: 201710458864.1, published 2017-09-26 discloses a casing scraper, the middle part of the inner side of an upper joint is fixedly connected with the upper end of the outer side of a body; the middle part of the inner side of the lower joint is fixedly connected with the lower end of the outer side of the body; the body between the upper joint and the lower joint is sleeved with a scraping pipe capable of radially contracting, and the scraping pipe is provided with scraping teeth; the scraping pipe comprises an upper connecting joint, a lower connecting joint and an elastic scraping blade; the pipe string scraping device comprises an upper connecting joint, a lower connecting joint, a scraper and a sleeve scraper anti-disengaging joint, wherein the scraper is arranged at the upper part of the lower connecting joint through threads, the scraper is arranged at the lower part of the lower connecting joint, and the scraper is arranged at the lower part of the lower connecting joint.
Application No.: 201410807297.2, published 2015-05-06 discloses a rotary casing scraper and scraping method. The traditional rubber sleeve type casing scraper and the spring type casing scraper have the problem of incomplete scraping, the most main problem is that the scraper is connected with a drill bit or a milling tool and is put into a well simultaneously in a novel efficient drilling technology, the scraper inevitably rubs a casing along with the rotation of the drill bit or the milling tool, the casing is inevitably damaged by long-time friction and even the casing is abraded to cause accidents, and therefore the traditional scraper cannot be connected with the drill bit and the milling tool and is put into the well together. The invention comprises the following steps: rotary tube (1) of rotation type sleeve pipe scraper, rotary tube middle part cover have a set of sheath (2), the sheath between be equipped with spinning blade (3), rotary tube lower extreme be connected with lower clutch (4), rotary tube with the lower clutch between be equipped with seal groove (5), rotary tube with the sheath between be equipped with rolling element (6), the sheath with the position that the rolling element corresponds on be equipped with plug (7). The invention is used for removing the residual materials on the wall of the underground casing.
Disclosure of Invention
The invention aims to provide a self-rotating casing scraping processor for oil-water well workover, which overcomes the problems, enables a scraping block to rotate when scraping a casing, can scrape the casing in all directions, improves the quality of the scraped casing, and ensures the quality of the workover.
In order to achieve the above object, the present invention provides a self-rotating casing scraping processor for oil-water well workover, comprising an inner pipe, an upper driving sleeve, a lower driving sleeve, a rotating pipe and a scraping mechanism, the rotary pipe is sleeved on the outer wall of the inner pipe, the scraping mechanism is arranged on the rotary pipe, the upper end of the rotary pipe is provided with an upper active spiral track, the lower end of the rotary pipe is provided with a lower active spiral track, an upper passive spiral track is arranged at the lower end of the upper driving sleeve, the upper driving spiral track is matched with the upper passive spiral track, so that the upper driving spiral track and the upper passive spiral track can generate relative rotation when being engaged, the upper end of the lower driving sleeve is provided with a lower driven spiral track, and the lower driving spiral track is matched with the lower driven spiral track so that the lower driving spiral track and the lower driven spiral track can rotate relatively when being meshed.
The upper driving spiral track and the upper driven spiral track are matched cambered surface tooth-shaped tracks; the lower driving spiral track and the lower driven spiral track are cambered surface tooth-shaped tracks which are matched with each other.
The rotating pipe outer wall sets up 2 mounting grooves at least at same height, all installs scraping mechanism in each mounting groove, and mounting groove and scraping mechanism of same height constitute a scraping group jointly, the rotating pipe outer wall sets up 3 scraping groups at least, and the mounting groove in 3 scraping groups staggers each other in the axial direction.
The scraping mechanism comprises a scraping block and a spring, the outer wall of the scraping block is in a spiral shape or a continuous ring platform shape, the spring is arranged between the inner wall of the scraping block and the bottom surface of the mounting groove, the upper end of the scraping block is fixed through an upper limiting cap, the upper limiting cap is screwed on the outer wall of the rotating pipe, the lower end of the scraping block is fixed through a lower limiting cap, and the lower limiting cap is screwed on the outer wall of the rotating pipe.
And the cutting block is arranged on the spiral of the scraping block on the scraper of the middle group in the 3 groups of scraping groups, and the material of the cutting block is hard alloy.
The upper driving sleeve and the lower driving sleeve are fixedly sleeved on the outer wall of the inner pipe through respective fastening screws, and the distance between the lowest end of the upper driving sleeve and the highest end of the lower driving sleeve is larger than the axial length of the rotating pipe.
The upper end of the inner tube is connected with the upper joint in a threaded manner, the lower end of the inner tube is connected with the lower joint in a threaded manner, the lower end face of the upper joint can axially limit the upper driving sleeve, and the upper end face of the lower joint can axially limit the lower driving sleeve.
Compared with the prior art, the invention has the following beneficial effects:
when the pipe column is driven to reciprocate up and down at the key scraping position of the casing, the upper driving spiral track is meshed with the upper driven spiral track, the lower driving spiral track is meshed with the lower driven spiral track, the rotating pipe can rotate when the upper driving spiral track is meshed with the upper driven spiral track, and the rotating pipe can rotate when the lower driving spiral track is meshed with the lower driven spiral track to drive the scraper to rotate.
Drawings
FIG. 1 is a schematic structural diagram of a self-rotating casing scraping processor for oil-water well workover according to the present invention.
In the figure: 1 is an upper joint; 2 is an upper driving sleeve; 3 is an inner tube; 4 is a rotating tube; 5 is an upper limit cap; 6 is a spring; 7 is a scraping block; 8 is a lower limit cap; 9 is a cutting block; 10 is a lower driving sleeve; and 11 is a lower joint.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a self-rotating scraping casing processor for oil-water well workover comprises an inner pipe 3, an upper driving sleeve 2, a lower driving sleeve 10, a rotating pipe 4 and a scraping mechanism, the rotating pipe 4 is sleeved on the outer wall of the inner pipe 3, the scraping mechanism is arranged on the rotating pipe 4, the upper end of the rotating pipe is provided with an upper driving spiral track 4-2, the lower end of the rotating pipe is provided with a lower driving spiral track 4-3, an upper passive spiral track 2-1 is arranged at the lower end of the upper driving sleeve, the upper driving spiral track is matched with the upper passive spiral track, so that the upper driving spiral track and the upper passive spiral track can generate relative rotation when being engaged, the upper end of the lower driving sleeve is provided with a lower driven spiral track 10-1, and the lower driving spiral track is matched with the lower driven spiral track, so that the lower driving spiral track and the lower driven spiral track can generate relative rotation when being meshed.
The upper driving spiral track and the upper driven spiral track are matched cambered surface tooth-shaped tracks; the lower driving spiral track and the lower driven spiral track are matched cambered surface tooth-shaped tracks.
The outer wall of the rotary pipe is provided with at least 2 mounting grooves 4-1 at the same height, each mounting groove is internally provided with a scraping mechanism, the mounting grooves at the same height and the scraping mechanisms jointly form a scraping group, the outer wall of the rotary pipe is at least provided with 3 scraping groups, and the mounting grooves in the 3 scraping groups are staggered in the axial direction.
The scraping mechanism comprises a scraping block 7 and a spring 6, the outer wall of the scraping block is in a spiral shape or a continuous annular table shape, the spring 6 is arranged between the inner wall of the scraping block 7 and the bottom surface of 4-1 of the mounting groove, the upper end of the scraping block is fixed through an upper limiting cap 5, the upper limiting cap is screwed on the outer wall of the rotating pipe 4, the lower end of the scraping block 7 is fixed through a lower limiting cap 8, and the lower limiting cap is screwed on the outer wall of the rotating pipe 4.
And a cutting block 9 is arranged on the spiral of the scraping block on the scraper of the middle group in the 3 groups of scraping groups, and the material of the cutting block is hard alloy.
The upper driving sleeve 2 and the lower driving sleeve 10 are fixedly sleeved on the outer wall of the inner pipe through respective fastening screws, and the distance between the lowest end of the upper driving sleeve and the highest end of the lower driving sleeve is larger than the axial length of the rotating pipe.
The upper end of the inner tube is in threaded connection with the upper joint 1, the lower end of the inner tube is in threaded connection with the lower joint 11, the lower end face of the upper joint can axially limit the upper driving sleeve, and the upper end face of the lower joint can axially limit the lower driving sleeve.
The upper driving sleeve 2 and the lower driving sleeve 10 are fixed on the inner tube 3 by screws, or fixed on the upper joint and the lower joint, or the upper driving sleeve 2 and the upper joint 1 are designed into a whole, and the lower joint 10 and the lower joint 11 are designed into a whole, and these changes are all within the protection scope of the invention.
The outer wall of a rotary pipe 4 is milled with a mounting groove 4-1, 2-4 mounting grooves 4-1 are milled on the same section, a spring 6 is mounted on each mounting groove 4-1, a scraping block 7 is mounted in the mounting groove 4-1, an upper limit cap 5 and a lower limit cap 8 are mounted on the rotary pipe 4, the lower portion of the upper limit cap 5 is sleeved on the upper portion of the scraping block 7, the upper portion of the lower limit cap 8 is sleeved on the lower portion of the scraping block 7, so that the scraping block 7 can only radially expand in the mounting groove 4-1 and cannot axially and circumferentially rotate, the spring 6 is abutted against the scraping block 7, when the scraping block 7 is in a free state, the circular diameter surrounded by 2-4 scraping blocks 7 is larger than the inner diameter of a sleeve to be put in, after the scraping block 7 is put in the sleeve, the scraping block 7 can be tightly attached to the inner wall of the sleeve, and the upper portion of the rotary pipe 4 is provided with an upper driving spiral track 4-2, the lower part of the rotating pipe 4 is provided with a lower driving spiral track 4-3, the upper joint 1 and the upper driving sleeve 2 are arranged on the outer wall of the upper end of the inner pipe 3, the lower part of the upper driving sleeve 2 is provided with an upper driven spiral track 2-1, the upper driving spiral track 4-2 is matched with the upper driven spiral track 2-1, the cambered surfaces of the upper driving spiral track 4-2 and the upper driven spiral track 2-1 are tangent to generate relative rotation when being meshed, the lower driving sleeve 10 and the lower joint 11 are arranged on the lower part of the inner pipe 3, the upper part of the lower driving sleeve 10 is provided with a lower driven spiral track 10-1, the lower driving spiral track 4-3 is matched with the lower driven spiral track 10-1, and the cambered surfaces of the lower driving spiral track 4-3 and the lower driven spiral track 10-1 are tangent when being meshed, relative rotation can be generated.
The further measure of the invention is that 2-4 scraping blocks 7 arranged on the same section of the rotary pipe 4 form a group of scrapers, 3 groups of scrapers are arranged on the rotary pipe 4, and the scraping blocks 7 on the 3 groups of scrapers are arranged in a staggered manner.
The invention has the further measure that the cutting block 9 is arranged on the spiral of the scraping block 7 on the middle group of scrapers, and the material of the cutting block 9 is hard alloy.
When the pipe column of the invention is driven to reciprocate up and down at the key scraping position of the sleeve, the scraping block 7 can cling to the inner wall of the sleeve after the scraping block 7 is put into the sleeve, the rotating pipe can be forced to move up and down, for example, when the rotating pipe moves up, the upper driving spiral track 4-2 is meshed with the upper driven spiral track 2-1, and when the upper driving spiral track 4-2 is meshed with the upper driven spiral track 2-1, the rotating pipe 4 can generate the action of rotating around the inner pipe to drive the scraper to rotate and scrape impurities on the inner wall of the sleeve; for example, when the scraper moves downwards, the lower driving spiral track 4-3 is meshed with the lower driven spiral track 10-1, and when the lower driving spiral track 4-3 is meshed with the lower driven spiral track 10-1, the rotating pipe 4 can rotate to drive the scraper to rotate.
In the description of the present invention, it is to be understood that the positional indications or positional relationships are based on those shown in the drawings and are for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a casing treater is scraped to autogyration that oil and water well workover was used, its characterized in that includes inner tube, upper drive cover, lower drive cover, rotatory pipe, scraping mechanism, rotatory pipe box is at the inner tube outer wall, scraping mechanism installs on rotatory pipe, rotatory pipe upper end is seted up initiative spiral track, and rotatory pipe lower extreme is seted up initiative spiral track down, passive spiral track is seted up to upper drive cover lower extreme, upper initiative spiral track with upper passive spiral track matches, makes upper initiative spiral track with can produce relative rotation when upper passive spiral track meshes, driven spiral track is seted up to lower drive cover upper end down, lower initiative spiral track with passive spiral track matches down, makes lower initiative spiral track with can produce relative rotation when lower passive spiral track meshes.
2. The self-rotating casing scraping processor for oil-water well workover according to claim 1, wherein the upper driving spiral track and the upper driven spiral track are matched cambered tooth-shaped tracks; the lower driving spiral track and the lower driven spiral track are cambered surface tooth-shaped tracks which are matched with each other.
3. The self-rotating scraping sleeve processor for oil-water well workover according to claim 1 or 2, wherein the outer wall of the rotating pipe is provided with at least 2 mounting grooves at the same height, each mounting groove is provided with the scraping mechanism, the mounting grooves and the scraping mechanisms at the same height form a scraping group, the outer wall of the rotating pipe is provided with at least 3 scraping groups, and the mounting grooves in the 3 scraping groups are staggered in the axial direction.
4. The self-rotating scraping sleeve processor for oil-water well workover according to claim 3, wherein the scraping mechanism comprises a scraping block and a spring, the outer wall of the scraping block is spiral or continuous annular table-shaped, the spring is arranged between the inner wall of the scraping block and the bottom surface of the mounting groove, the upper end of the scraping block is fixed by an upper limit cap, the upper limit cap is in threaded type sleeved on the outer wall of the rotating pipe, the lower end of the scraping block is fixed by a lower limit cap, and the lower limit cap is in threaded type sleeved on the outer wall of the rotating pipe.
5. The self-rotating scraper casing treater for oil-water well workover according to claim 3, wherein the cutting block is mounted on the spiral of the scraper block on the scraper block of the middle scraper group in the 3 scraper groups, and the material of the cutting block is hard alloy.
6. The self-rotating scraping casing pipe processor for oil-water well workover according to claim 1 or 2, wherein the upper driving sleeve and the lower driving sleeve are fixedly sleeved on the outer wall of the inner pipe through respective fastening screws, and the distance between the lowest end of the upper driving sleeve and the highest end of the lower driving sleeve is larger than the axial length of the rotating pipe.
7. The self-rotating casing scraping device for oil-water well workover according to claim 1 or 2, wherein the upper end of the inner pipe is in threaded connection with the upper joint, the lower end of the inner pipe is in threaded connection with the lower joint, the lower end surface of the upper joint can axially limit the upper driving sleeve, and the upper end surface of the lower joint can axially limit the lower driving sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811066507.1A CN110894780A (en) | 2018-09-13 | 2018-09-13 | Self-rotating scraping casing pipe processor for oil-water well workover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811066507.1A CN110894780A (en) | 2018-09-13 | 2018-09-13 | Self-rotating scraping casing pipe processor for oil-water well workover |
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| Publication Number | Publication Date |
|---|---|
| CN110894780A true CN110894780A (en) | 2020-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811066507.1A Pending CN110894780A (en) | 2018-09-13 | 2018-09-13 | Self-rotating scraping casing pipe processor for oil-water well workover |
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| CN (1) | CN110894780A (en) |
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| CN2376529Y (en) * | 1999-05-14 | 2000-05-03 | 胜利石油管理局临盘采油厂 | Rotatable stabilizing wax scraper |
| CN2433388Y (en) * | 2000-06-12 | 2001-06-06 | 陆华飞 | Rotary paraffin scraping centralising device |
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Application publication date: 20200320 |