CN109138921B - Automatic paraffin scraper for self-blowing well - Google Patents
Automatic paraffin scraper for self-blowing well Download PDFInfo
- Publication number
- CN109138921B CN109138921B CN201811283886.XA CN201811283886A CN109138921B CN 109138921 B CN109138921 B CN 109138921B CN 201811283886 A CN201811283886 A CN 201811283886A CN 109138921 B CN109138921 B CN 109138921B
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- China
- Prior art keywords
- movable cylinder
- wax
- central rod
- liquid
- capsule
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- 239000012188 paraffin wax Substances 0.000 title claims abstract description 22
- 238000007664 blowing Methods 0.000 title description 6
- 239000001993 wax Substances 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000007790 scraping Methods 0.000 claims abstract description 38
- 239000002775 capsule Substances 0.000 claims abstract description 19
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004018 waxing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
- E21B37/04—Scrapers specially adapted therefor operated by fluid pressure, e.g. free-piston scrapers
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Lubricants (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses an automatic paraffin scraper for a flowing well, which comprises a central rod, wherein a movable cylinder device is sleeved outside the central rod, and the movable cylinder device is connected with a paraffin scraping assembly. After the wax scraper is thrown into an oil pipe, a capsule of a movable cylinder device is tightly attached to the wall of the oil pipe, the capsule of the movable cylinder device moves upwards under the pushing of a flowing liquid flow of a well liquid flowing from a jet to an upper position, a wax scraping sheet of a wax scraping assembly is dragged to scrape wax, after the capsule reaches a well head and contacts the well head device, a baffle ring of a central rod is knocked open to allow a liquid flow channel of a liquid through hole, the movable cylinder device and the wax scraping assembly can fall under the action of self weight and return to the bottom of the oil pipe, after the wax scraper strikes the bottom of the oil pipe, the baffle ring of the central rod realizes the plugging of the liquid through hole of the movable cylinder again, and then the wax scraping sheet in the wax scraping assembly of the wax scraper moves upwards under the pushing.
Description
Technical Field
The invention belongs to the technical field of oil extraction in oil fields, and relates to an automatic paraffin scraper for a flowing well.
Background
In the process of upward flow of liquid of an oilfield self-blowing production well, paraffin is continuously separated out and adhered to the inner wall of an oil pipe, so that paraffin removal is required frequently, and in the conventional self-blowing well paraffin removal process, a paraffin removal winch is adopted to lower a paraffin removal blade to the bottom of the oil pipe through a lower steel wire and then lift the paraffin removal blade, and the paraffin removal blade scrapes the paraffin on the inner wall of the oil pipe in the lifting process. The wax removal work is heavy because the wax removal work is performed frequently to keep the oil pipe smooth.
In order to reduce the workload of paraffin removal, an automatic paraffin scraper for a flowing well is developed, and can automatically move up and down in an oil pipe to scrape paraffin under the action of flowing liquid.
Disclosure of Invention
The invention aims to provide an automatic paraffin scraper for a flowing well, which can realize automatic paraffin scraping in an oil pipe and reduce the production cost of oil extraction.
The technical scheme adopted by the invention is as follows: the utility model provides an automatic wax scraper of flowing well, is including well core rod, and well core rod's outside cover has a movable cylinder device, and movable cylinder device bilateral symmetry is connected with scrapes the wax subassembly.
The present invention is also characterized in that,
the wax scraping assembly comprises an inner vertical sheet, the inner vertical sheet is hinged with a group of rotating sheets, and each rotating sheet is provided with a pin shaft; still including founding the piece outward, found the piece outward and be connected with a set of rotor plate through the round pin axle, found the piece outward and keep away from one side fixedly connected with paraffin scraper of a movable cylinder device.
The wax scraping sheet is arc-shaped.
The movable cylinder device comprises a movable cylinder, and the outer wall of the lower end of the movable cylinder is fixedly connected with the inner vertical sheet.
The upper part of the movable cylinder is sleeved with a capsule, and the lower part of the movable cylinder is sleeved with a movable cylinder outer sleeve; the upper end of the capsule is fixed at the upper end of the movable cylinder, and the lower end of the capsule is fixedly connected with the outer sleeve of the movable cylinder.
The movable cylinder is provided with a longitudinal strip window at the part matched with the capsule.
The upper end part of the movable cylinder is provided with a liquid through hole.
The central rod is fixed with a baffle ring which corresponds to the lower part of the step.
The central rod is provided with a limiting boss;
the upper end of the central rod is connected with a fishing head.
The invention has the beneficial effects that: the invention relates to an automatic wax scraper for a flowing well, which is characterized in that after the wax scraper is thrown into an oil pipe, a capsule of a movable cylinder device is tightly attached to the wall of the oil pipe, moves upwards under the push of the flowing liquid of well liquid flowing upwards from the flowing pipe, drags a wax scraping sheet to scrape wax, stops moving upwards after the upper end of a central rod reaches a well mouth and collides with a well mouth device, a baffle ring on the central rod leaves a liquid flow channel blocked by the baffle ring, the blocking effect is lost, the movable cylinder device and the wax scraping sheet component can fall under the action of self weight and return to the bottom of the oil pipe, after the central rod collides with the bottom of the oil pipe, the baffle ring on the central rod blocks a liquid through hole of the movable cylinder again, and then the wax scraper moves upwards to scrape wax under the push of the liquid.
Drawings
FIG. 1 is a schematic structural diagram of an automatic wax scraper for a flowing well according to the present invention.
In the figure, 1, a center rod, 1-1, a retaining ring, 1-2, a limiting boss, 1-3, a fishing head, 2, a movable cylinder device, 2-1, a movable cylinder, 2-2, a capsule, 2-3, a movable cylinder jacket, 2-4, a strip window, 2-5, a step, 2-6, a liquid through hole, 3, a wax scraping group, 3-1, an inner vertical sheet, 3-2, a rotary sheet, 3-3, an outer vertical sheet and 3-4, a wax scraping sheet.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides an automatic wax scraper for a flowing well, which comprises a central rod 1, wherein a movable cylinder device 2 is sleeved outside the central rod 1, and wax scraping assemblies 3 are symmetrically connected with the movable cylinder device 2, as shown in figure 1.
The wax scraping assembly 3 comprises an inner vertical sheet 3-1, the inner vertical sheet 3-1 is connected with a group of rotating sheets 3-2 through a pin shaft, and each rotating sheet 3-2 is provided with a pin shaft; the wax scraping device also comprises an outer vertical sheet 3-3, wherein the outer vertical sheet 3-3 is connected with a group of rotating sheets 3-2 through a pin shaft, and one side of the outer vertical sheet 3-3, which is far away from the movable cylinder device 2, is fixedly connected with a wax scraping sheet 3-4. The inner vertical sheet 3-1, the rotating sheet 3-2 and the outer vertical sheet 3-3 are combined into a rectangular shape when going upwards; but when descending, is subjected to the resistance of waxing on the tube wall; the rotating sheet 3-2, the outer vertical sheet 3-2 and the inner vertical sheet 3-1 of the two wax scraping assemblies 3 move to form a parallelogram under the action of the pin shaft, so that the radial dimension formed between the two symmetrical wax scraping sheets 3-4 is reduced, and the wax scraper can avoid the obstruction of waxing the pipe wall and fall smoothly.
The wax scraping sheets 3-4 are arc-shaped in overlook and are symmetrically arranged.
The movable cylinder device 2 comprises a movable cylinder 2-1, and an inner vertical sheet 3-1 is welded on the outer wall of the lower end of the movable cylinder 2-1.
The upper part of the movable cylinder 2-1 is sleeved with a capsule 2-2, and the lower part of the movable cylinder 2-1 is sleeved with a movable cylinder jacket 2-3; the upper end of the capsule 2-2 is fixed at the upper end of the movable cylinder 2-1, and the lower end of the capsule 2-2 is fixedly connected with the outer sleeve 2-3 of the movable cylinder.
The movable cylinder 2-1 is provided with a longitudinal strip window 2-4 at the part matched with the capsule 2-2, and the strip window 2-4 has the function that when the movable cylinder device 2 and the wax scraping assembly 3 fall, well liquid can bypass the baffle ring 1-1 from the strip window 2-4 to pass through.
The upper end part of the movable cylinder 2-1 is provided with a liquid through hole 2-6; steps 2-5 are arranged below the liquid through holes 2-6.
The central rod 1 is fixed with a baffle ring 1-1 through a pin, the baffle ring 1-1 corresponds to the lower part of the step 2-5 and is used for limiting the upward moving position of the central rod 1 relative to the movable cylinder device 2 and matching the baffle ring 1-1 to block a liquid flow channel.
The central rod 1 is provided with a limiting boss 1-2, and the limiting boss 1-2 is used for limiting the downward movement distance of the central rod 1 relative to the movable cylinder device 2.
The upper end part of the central rod 1 is connected with a fishing head 1-3.
The invention relates to a working process of an automatic paraffin scraper of a flowing well, which comprises the following steps:
when the wax scraper is positioned at the inner bottom of the oil pipe, the baffle ring 1-1 fixed on the central rod 1 is pressed on the step 2-5 at the end of the liquid through pipe, so that a liquid flow channel in the movable cylinder 2-1 is blocked, at the moment, the outer wall of the capsule 2-2 is attached to the inner wall of the oil pipe, a whole oil pipe well liquid passage is closed, the upward sprayed well liquid can push the whole wax scraper to move upwards, and the wax scraper drags the wax scraping sheet 3-4 to scrape off attached wax on the inner wall of the oil pipe when moving upwards.
When the wax scraper moves upwards to a wellhead, the fishing head 1-3 stops moving upwards after encountering with the wellhead device, the outer movable barrel device 2 and the wax scraping component 3 continue moving upwards under the action of the pressure of liquid and the self inertia force until encountering with the stop boss 1-2 on the central rod 1, at the moment, the baffle ring 1-1 leaves the step 2-5 of the liquid through pipe, the liquid flow channel is vacated, well liquid can pass through the liquid through hole 2-6 of the movable barrel 2-1, and the whole movable barrel device 2 and the wax scraping component 3 fall under the action of self weight.
When the wax scraper falls to the bottom of an oil pipe, the lower end of the central rod 1 can be pressed on a bottom stopper of the oil pipe, the central rod 1 stops descending, the movable cylinder device 2 and the wax scraping assembly 3 continue descending under the action of gravity and inertia force until the baffle ring 1-1 on the central rod 1 presses the step 2-5 of the liquid through pipe again, at the moment, the liquid flow channel of the liquid through hole 2-6 of the movable cylinder 2-1 is blocked again, and well liquid pushes the wax scraper to scrape wax upwards again. The automatic wax scraping is realized by the continuous reciprocating.
Through the mode, after the automatic wax scraper for the self-blowing well is put into an oil pipe, the capsule 2-2 of the movable cylinder device 2 is tightly attached to the wall of the oil pipe, the wax scraping sheets 3-4 of the wax scraping component 3 are dragged to scrape wax under the pushing of the flowing well liquid of the flowing self-blowing upward and reach the wellhead to contact the wellhead device, the baffle ring 1-1 of the central rod 1 is knocked open to leave a liquid flow channel of the liquid through hole 2-6, the movable cylinder device 2 and the wax scraping component 3 can fall under the action of self weight, return to the bottom of an oil pipe and collide with the bottom of the oil pipe, the baffle ring 1-1 of the central rod 1 realizes the plugging of the liquid through hole 2-6 of the movable cylinder 2-1 again, so that the wax scraping sheet 2-4 in the wax scraping component 3 of the wax scraper moves upwards to scrape wax under the pushing of liquid flow, and the automatic wax scraping is realized by the continuous reciprocating.
Claims (3)
1. An automatic wax scraper for a flowing well is characterized by comprising a central rod (1), wherein a movable cylinder device (2) is sleeved outside the central rod (1), and the movable cylinder device (2) is symmetrically connected with wax scraping components (3);
the wax scraping assembly (3) comprises an inner vertical sheet (3-1), the inner vertical sheet (3-1) is hinged with a group of rotating sheets (3-2), and each rotating sheet (3-2) is provided with a pin shaft; the wax scraping device is characterized by further comprising an outer vertical sheet (3-3), wherein the outer vertical sheet (3-3) is connected with a group of rotating sheets (3-2) through a pin shaft, and one side, far away from the movable cylinder device (2), of the outer vertical sheet (3-3) is fixedly connected with a wax scraping sheet (3-4);
the wax scraping sheets (3-4) are arc-shaped;
the two wax scraping assemblies (3) are symmetrically arranged;
the movable cylinder device (2) comprises a movable cylinder (2-1), and the outer wall of the lower end of the movable cylinder (2-1) is fixedly connected with the inner vertical sheet (3-1);
the upper part of the movable cylinder (2-1) is sleeved with a capsule (2-2), and the lower part of the movable cylinder (2-1) is sleeved with a movable cylinder jacket (2-3); the upper end of the capsule (2-2) is fixed at the upper end of the movable cylinder (2-1), and the lower end of the capsule (2-2) is fixedly connected with the movable cylinder outer sleeve (2-3);
the movable cylinder (2-1) is provided with a longitudinal strip window (2-4) at the part matched with the capsule (2-2);
the upper end part of the movable cylinder (2-1) is provided with a liquid through hole (2-6); a liquid through pipe is arranged below the liquid through hole (2-6), and the end of the liquid through pipe is provided with a step (2-5).
2. The automatic paraffin scraper for the flowing well according to claim 1, characterized in that the central rod (1) is fixed with a baffle ring (1-1), and the baffle ring (1-1) corresponds to the lower part of the step (2-5).
3. The automatic paraffin scraper for the flowing well according to claim 1, characterized in that the central rod (1) is provided with a limit boss (1-2);
the upper end part of the central rod (1) is connected with a fishing head (1-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811283886.XA CN109138921B (en) | 2018-10-31 | 2018-10-31 | Automatic paraffin scraper for self-blowing well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811283886.XA CN109138921B (en) | 2018-10-31 | 2018-10-31 | Automatic paraffin scraper for self-blowing well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109138921A CN109138921A (en) | 2019-01-04 |
| CN109138921B true CN109138921B (en) | 2020-11-17 |
Family
ID=64806724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811283886.XA Active CN109138921B (en) | 2018-10-31 | 2018-10-31 | Automatic paraffin scraper for self-blowing well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109138921B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88212806U (en) * | 1988-04-02 | 1988-12-07 | 四川石油管理局钻采工艺研究所 | Trunk piston for oil well desintering wax |
| CN2206836Y (en) * | 1994-05-17 | 1995-09-06 | 王传贤 | Self-propelled flexibility wax cleaner for oil pipe |
| CN200943467Y (en) * | 2006-09-14 | 2007-09-05 | 大庆油田有限责任公司 | Movable paraffin scraper |
| WO2015004203A1 (en) * | 2013-07-11 | 2015-01-15 | Shell Internationale Research Maatschappij B.V. | System for drilling a borehole and use thereof |
| CN105317402B (en) * | 2014-06-12 | 2018-08-17 | 中国石油化工股份有限公司 | Paraffin removal unit for flowing well |
| NO342533B1 (en) * | 2015-03-18 | 2018-06-11 | Qinterra Tech As | Collection unit and method for detaching and collecting contaminants from a well |
| CN204571936U (en) * | 2015-05-04 | 2015-08-19 | 王克新 | Paraffin scraper |
| CN205297478U (en) * | 2015-12-28 | 2016-06-08 | 中国石油天然气股份有限公司 | Scrape device |
| CN206753545U (en) * | 2017-05-18 | 2017-12-15 | 中国石油化工股份有限公司 | A kind of automatic paraffin removal tool of pit shaft |
| CN108104770B (en) * | 2018-01-19 | 2019-12-20 | 西南石油大学 | Novel paraffin removal and scale removal device suitable for self-blowing oil production well |
-
2018
- 2018-10-31 CN CN201811283886.XA patent/CN109138921B/en active Active
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| Publication number | Publication date |
|---|---|
| CN109138921A (en) | 2019-01-04 |
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