CN109577918B - Wax-removing and descaling device for oil well - Google Patents
Wax-removing and descaling device for oil well Download PDFInfo
- Publication number
- CN109577918B CN109577918B CN201910003155.3A CN201910003155A CN109577918B CN 109577918 B CN109577918 B CN 109577918B CN 201910003155 A CN201910003155 A CN 201910003155A CN 109577918 B CN109577918 B CN 109577918B
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- Prior art keywords
- pressing cap
- self
- gravity
- packer
- cap
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- 239000003129 oil well Substances 0.000 title claims abstract description 13
- 238000003825 pressing Methods 0.000 claims abstract description 23
- 230000005484 gravity Effects 0.000 claims abstract description 16
- 239000012188 paraffin wax Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000003801 milling Methods 0.000 claims description 15
- 239000001993 wax Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 239000013043 chemical agent Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract 3
- 239000000126 substance Substances 0.000 description 4
- 210000005056 cell body Anatomy 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 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
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to the technical field of downhole completion of petroleum and natural gas industry, in particular to a paraffin removal and descaling device for an oil well. The device includes wire rope, gravity packer, reaction torque self-lock ware, screw motor and mills the awl, the gravity packer includes hammer block, packing element and center tube, and the cap is pressed in the connection of hammer block lower extreme, and it has the circulation hole to open on the pressure cap, and the hanging of center tube upper end is on pressing cap inner wall step face, and the packing element suit is on the center tube, and the packing element is arranged in and is pressed between cap and the tray, and the tray is connected at the center tube lower extreme. The invention realizes that the oil pipe does not need to be taken out one by one from the well, and any chemical agent does not need to be injected, the paraffin removal and scale removal effects on the inner wall of the casing pipe are good, the working procedure is simple, the cost is reduced, the production layer is not polluted, and the oil pipe and other downhole tools are not damaged.
Description
The technical field is as follows:
the invention relates to the technical field of downhole completion of petroleum and natural gas industry, in particular to a paraffin removal and descaling device for an oil well.
Background art:
in the oil and gas exploration and development field, the produced liquid of the oil well flows through the inner wall of an oil pipe or a casing pipe, wax deposition and scale generation can be realized, the impurities accumulate on the inner wall of the pipe column day by day and month, the pipe column can be gradually blocked, and the normal production of the oil and gas well is influenced. The common paraffin removal and descaling modes in the current underground operation mainly comprise: chemical wax and scale removal, ground high-pressure water jet removal and the like.
The chemical method for removing wax and scale is to inject chemical agents from a well head and remove scale and wax by chemical reaction on chemical solution, and the method has the defects of high cost and pollution to an oil layer; the ground high-pressure water jet cleaning method is to take out oil pipes one by one from the well, transport the oil pipes to a specific cleaning place, and clean the oil pipes by using special equipment, so that the operation process is complicated and the cost is high.
The invention content is as follows:
the technical problem to be solved by the invention is to provide the oil well wax and scale removal device, which does not need to take out oil pipes one by one from the well and inject any chemical agent, has good wax and scale removal effect on the inner wall of a casing, has simple process, reduces the cost, does not pollute a production zone, and does not damage the oil pipes and other underground tools. The defects that the existing chemical wax removal and descaling method is high in cost and pollutes oil layers, the ground high-pressure water jet cleaning method needs to lift oil pipes out of a well one by one, and the operation process is complicated and high in cost are overcome.
The technical scheme adopted by the invention is as follows: a wax removal and scale removal device for an oil well comprises a steel wire rope, a gravity packer, a reactive torque self-locking device, a screw motor and a milling cone, wherein the gravity packer comprises a hammer body, a rubber cylinder and a central pipe, the lower end of the hammer body is connected with a pressing cap, a circulating hole is formed in the pressing cap, the upper end of the central pipe is hung on the step surface of the inner wall of the pressing cap, the rubber cylinder is sleeved on the central pipe, the rubber cylinder is arranged between the pressing cap and a tray, and the tray is connected to the lower end of the central pipe;
the anti-torque self-locking device comprises a cam shaft with a central channel, a groove body is sleeved on the upper portion of the cam shaft, springs are mounted in a plurality of mounting grooves of the groove body, the outer side of each spring is connected with a centering block, an upper pressing cap and a connecting cylinder are respectively connected to the upper end and the lower end of the groove body and limit the centering block, a three-piece cam is designed on the outer wall of the lower portion of the cam shaft, three self-locking keys are placed between the connecting cylinder and a lower pressing cap and matched with the three-piece cam, the three-piece cam can push the corresponding three self-locking keys to extend out and enable the self-locking keys to be locked on the inner wall of an oil pipe, the self-locking keys are limited through the lower pressing cap, the lower pressing cap is;
the lower end of the steel wire rope is connected with a hammer body of the gravity packer, the lower end of the gravity packer is connected with a cam shaft, the cam shaft is connected with a screw motor, and the screw motor is connected with the milling cone.
The milling cone comprises a cone body, a cutting edge and a water hole are formed in the cone body, and the cutting edge is made of hard alloy particles through surfacing.
The invention has the beneficial effects that: the invention realizes that the oil pipe does not need to be taken out one by one from the well, and any chemical agent does not need to be injected, the paraffin removal and scale removal effects on the inner wall of the casing pipe are good, the working procedure is simple, the cost is reduced, the production layer is not polluted, and the oil pipe and other downhole tools are not damaged.
Description of the drawings:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of a reactive torque self-locker.
The specific implementation mode is as follows:
as shown in fig. 1 and 2, the oil well wax removal and scale removal device comprises a steel wire rope 1, a gravity packer 2, a reaction torque self-locking device 3, a screw motor 4 and a milling cone 5, wherein the gravity packer 2 comprises a hammer body 21, a rubber cylinder 24 and a central tube 25, the lower end of the hammer body 21 is connected with a press cap 22, the press cap 22 is provided with a circulation hole 23, the upper end of the central tube 25 is hung on the step surface of the inner wall of the press cap 22, the rubber cylinder 24 is sleeved on the central tube 25, the rubber cylinder 24 is arranged between the press cap 22 and a tray 26, and the tray 26 is connected with the lower end of the central tube 25;
reaction torque is from locker 3 including the camshaft 37 that has central channel, and camshaft 37 upper portion cover is equipped with cell body 32, all installs spring 34 in a plurality of mounting grooves of cell body 32, and righting piece 33 is connected in the spring 34 outside, and righting piece 33 can stretch out and retract in cell body 32. The upper pressing cap 31 and the connecting cylinder 35 are respectively connected to the upper end and the lower end of the groove body 32 and limit the righting block 33, the outer wall of the lower part of the cam shaft 37 is provided with a multi-lobe cam, the multi-lobe cam can push a plurality of corresponding self-locking keys 38 to extend out and enable the self-locking keys 38 to be locked on the inner wall of the oil pipe 6, the self-locking keys 38 are limited through the lower pressing cap 39, and bearings 36 are respectively arranged between the cam shaft 37 and the groove body 32 and between the cam shaft 37 and the lower pressing cap 39;
the hammer 21 of 2 gravity packers is connected to 1 lower extreme of wire rope, and 2 lower extremes of gravity packers connect camshaft 37, and camshaft 37 is connected with screw motor 4, and screw motor 4 is connected with milling awl 5.
The lower outer wall of the cam shaft 37 is designed with a three-piece cam which can push corresponding three self-locking keys 38 to extend out and lock the self-locking keys 38 on the inner wall of the oil pipe 6.
The milling cone 5 comprises a cone body, a cutting edge 51 and a water hole 52 are arranged on the cone body, and the cutting edge 51 is made of hard alloy particles through overlaying welding.
When the device is used, the outer diameter of the oil well paraffin removal and scale removal device is set according to the inner diameter of an oil pipe, the packer 2 is guaranteed to be capable of sealing the inner wall of the oil pipe, and the milling cone 5 is guaranteed to be capable of normally cutting.
The oil well paraffin removal and scale removal device is arranged in the oil pipe column by a steel wire rope for a ground winch, and moves downwards by means of dead weight, when the gravity packer 2 is in an initial state, the upper end bears the tensile force of the steel wire rope 1, the lower end bears the gravity of the screw motor 4 and the milling cone 5, and is in a stretching state, and the rubber sleeve 24 is not subjected to external force and keeps in a natural state; when the milling cone 5 runs down and meets scale or wax, the self-gravity of the hammer body 21 is applied to the pressing cap 22, and the rubber cylinder 24 expands under the extrusion of the pressing cap 22 and the tray 26 to close the inner diameter of the oil pipe. Power fluid is injected from a wellhead by the high-pressure pump, enters the circulating hole 23, sequentially flows through the central pipe 25, the central channel of the cam shaft 37 and the screw motor 4, and is finally ejected through the milling cone water hole 52. The power liquid drives the screw motor 4 to output torque T to the milling cone 5 so as to cut scale or wax, the stator of the screw motor 4 can generate reaction torque T ' with the same size, the T ' can be transmitted to the cam shaft 37, the cam shaft 37 is forced to rotate, the cam pushes out the self-locking key 38, the self-locking key 38 is meshed with the inner wall of the oil pipe to realize self-locking, and therefore the reaction torque T ' of the screw motor 4 is overcome, in the process, the centering block 33 extends out under the action of the spring 34 and forms friction resistance with the inner wall of the oil pipe, the friction resistance is larger than static friction force between the cam shaft 37 and the groove body 32, and therefore the reaction torque self-locking device 3 cannot rotate. The screw motor 4 drives the milling cone 5 to rotate, scale or wax is cut, the power liquid sprayed by the water hole 52 washes the chips, the chips are circularly discharged out of the well, the ground winch withdraws the steel wire rope 1 until the oil pipe column is completely cleaned, the oil well paraffin removal and scale removal device is lifted out, and the operation is finished.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (2)
1. The utility model provides an oil well paraffin removal scale removal device which characterized in that: the device comprises a steel wire rope (1), a gravity packer (2), a reaction torque self-locking device (3), a screw motor (4) and a milling cone (5), wherein the gravity packer (2) comprises a hammer body (21), a rubber cylinder (24) and a central tube (25), the lower end of the hammer body (21) is connected with a pressing cap (22), a circulating hole (23) is formed in the pressing cap (22), the upper end of the central tube (25) is hung on the step surface of the inner wall of the pressing cap (22), the rubber cylinder (24) is sleeved on the central tube (25), the rubber cylinder (24) is arranged between the pressing cap (22) and a tray (26), and the tray (26) is connected to the lower end of the central tube (25);
the anti-torque self-locking device (3) comprises a cam shaft (37) with a central channel, a groove body (32) is sleeved on the upper portion of the cam shaft (37), springs (34) are installed in a plurality of installation grooves of the groove body (32), a righting block (33) is connected to the outer side of each spring (34), an upper pressing cap (31) and a connecting cylinder (35) are connected to the upper end and the lower end of the groove body (32) respectively and limit the righting block (33), a three-piece cam is designed on the outer wall of the lower portion of the cam shaft (37), three self-locking keys (38) are placed between the connecting cylinder (35) and a lower pressing cap (39) and matched with the three-piece cam, the three-piece cam can push the corresponding three self-locking keys (38) to stretch out and enable the self-locking keys (38) to be locked on the inner wall of the oil pipe (6), the self-locking keys (38) are limited through the lower pressing cap (39), the lower pressing cap (39), Bearings (36) are arranged between the cam shaft (37) and the lower pressing cap (39);
the hammer body (21) of gravity packer (2) is connected to wire rope (1) lower extreme, and camshaft (37) are connected to gravity packer (2) lower extreme, and camshaft (37) are connected with screw motor (4), and screw motor (4) are connected with milling awl (5).
2. The wax and scale removal apparatus for an oil well according to claim 1, wherein: the milling cone (5) comprises a cone body, a cutting edge (51) and a water hole (52) are arranged on the cone body, and the cutting edge (51) is formed by hard alloy particle surfacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910003155.3A CN109577918B (en) | 2019-01-03 | 2019-01-03 | Wax-removing and descaling device for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910003155.3A CN109577918B (en) | 2019-01-03 | 2019-01-03 | Wax-removing and descaling device for oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109577918A CN109577918A (en) | 2019-04-05 |
| CN109577918B true CN109577918B (en) | 2021-01-26 |
Family
ID=65915796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910003155.3A Active CN109577918B (en) | 2019-01-03 | 2019-01-03 | Wax-removing and descaling device for oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109577918B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111021991A (en) * | 2019-12-30 | 2020-04-17 | 长江大学 | Online cleaning device for oil pumping pipe of vertical well |
| CN113565467B (en) * | 2021-07-08 | 2023-06-13 | 太原理工大学 | Umbrella-shaped geothermal well descaling device and descaling method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2312206C1 (en) * | 2006-03-27 | 2007-12-10 | Рауф Рахимович Сафаров | Device for oil well flow string cleaning of paraffin, piston and scraper included in the device (variants) |
| CN201991491U (en) * | 2011-02-18 | 2011-09-28 | 张忠信 | Online pressurized descaling device for oil pipe |
| CN202391386U (en) * | 2011-11-28 | 2012-08-22 | 中国石油集团长城钻探工程有限公司 | Combination clearing device for seriously-formed scale of oil-water well drivepipe |
| CN202325414U (en) * | 2011-12-12 | 2012-07-11 | 胡勇 | Scale removal stopper in oil and water tubing string |
| CN103306640B (en) * | 2013-07-04 | 2015-07-29 | 东北石油大学 | Rodless pump oil extraction system fluid power paraffin removal unit |
| CN104033128A (en) * | 2014-06-18 | 2014-09-10 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | Hydraulic delivery type tube scraper |
| CN204827378U (en) * | 2015-08-04 | 2015-12-02 | 中油测井技术服务有限责任公司 | Tubular well dredging tool |
| CN105604523A (en) * | 2015-12-25 | 2016-05-25 | 贵州高峰石油机械股份有限公司 | Method for improving pipe scraper and pipe scraper |
| CN106522884B (en) * | 2016-12-23 | 2019-03-29 | 牡丹江金恒石油机械科技有限公司 | Shocking type oil pipe stain eliminating device |
| CN106437622B (en) * | 2016-12-23 | 2019-01-04 | 牡丹江博实石油机械科技有限公司 | Hydraulic oil pipe stain eliminating device |
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- 2019-01-03 CN CN201910003155.3A patent/CN109577918B/en active Active
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| CN109577918A (en) | 2019-04-05 |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200930 Address after: 100120 Beijing Xicheng District six laying Kang Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Applicant before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. |
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