CN116104447A - Scale removing device and method for oil and gas well production oil pipe - Google Patents
Scale removing device and method for oil and gas well production oil pipe Download PDFInfo
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- CN116104447A CN116104447A CN202111334557.5A CN202111334557A CN116104447A CN 116104447 A CN116104447 A CN 116104447A CN 202111334557 A CN202111334557 A CN 202111334557A CN 116104447 A CN116104447 A CN 116104447A
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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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- 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
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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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
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Abstract
The invention relates to the technical field of oil and gas field development and production and gas well production pipe column scale removal, in particular to an oil and gas well production oil pipe scale removal device and an oil and gas well production pipe scale removal method. The invention has reasonable and compact structure, can realize the dirty attached to the oil pipe wall of the gas well, provides necessary production channels for normal production of the gas well, effectively avoids well repair operation caused by the blockage of the dirty inside the oil pipe wall, simultaneously can carry out operation through a steel wire well testing vehicle, can carry out well entry construction only by matching with a weighting device, has extremely low input cost, effectively avoids the damage of chemical agent descaling to the oil pipe of the gas well, and is a convenient and quick gas well oil pipe wall dirty removing device, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.
Description
Technical Field
The invention relates to the technical field of oil and gas field development and production and gas well production pipe column scale removal, in particular to an oil and gas well production pipe scale removal device and an oil and gas well production pipe scale removal method.
Background
In the production process of a gas well, certain scale substances are generated on the inner wall of a production oil pipe along with the change of formation produced water and the action of injecting certain chemical agents into the well, and the gas well cannot normally produce due to the blockage of a channel in the oil pipe when the scale substances are serious, so that the conventional scale removal technology is a chemical scale removal method at present, and the production method has an influence on the safety of a production pipe column of the gas well.
Disclosure of Invention
The invention provides a scale removing device and a scale removing method for an oil pipe of an oil gas well, which overcome the defects of the prior art and can effectively solve the problems of high cost, low efficiency, large damage to the oil pipe and poor safety in the existing scale removing process of the inner wall of the oil pipe.
One of the technical schemes of the invention is realized by the following measures: the utility model provides an oil gas well production oil pipe scale removal device, including the top connection, the center pole, the sliding sleeve, a cone section of thick bamboo, compression spring and storage section of thick bamboo, the center pole is vertical setting and the upper end outside has the inboard sealed spiro union of top connection lower extreme of internal thread with upper portion inboard, the center pole lower extreme is equipped with the centre bore that the upper end extends to center pole upper portion, the center pole outside that corresponds top connection below position along circumference interval distribution has a plurality of bypass hole with center hole upper portion intercommunication, the center pole outside that corresponds bypass hole below position is equipped with first outer annular, the sliding sleeve suit is in first outer annular, sliding sleeve upper end central authorities are equipped with the ascending upper groove of opening, upper groove internal fixation has the last C type ring of tightly suit in the center pole outside, the center pole outside that corresponds top connection downside position is equipped with the compression spring of lower extreme and last C type ring upper end looks tight, sliding sleeve lower extreme central authorities are equipped with the lower groove of opening downward, lower C type ring lower extreme and first outer side wall looks tight, the fixed position of sliding sleeve outside is equipped with the small cone section of thick bamboo outside the centre bore of thick bamboo, the inside the storage section of thick bamboo is equipped with the centre groove that corresponds the centre bore outside the inside of opening is equipped with between the inside the storage section of thick bamboo.
The following are further optimizations and/or improvements to one of the above-described inventive solutions:
the outer side of the middle part of the upper C-shaped ring can be provided with a second outer ring groove, a plurality of radial through upper threaded holes are distributed on the outer side of the upper end of the sliding sleeve corresponding to the position of the second outer ring groove along the circumferential direction at intervals, each upper threaded hole is connected with an upper fixing bolt with a screw end positioned in the second outer ring groove in a threaded mode, the outer side of the middle part of the lower C-shaped ring is provided with a third outer ring groove, a plurality of radial through lower threaded holes are distributed on the outer side of the lower end of the sliding sleeve corresponding to the position of the third outer ring groove along the circumferential direction at intervals, and each lower threaded hole is connected with a lower fixing bolt with a screw end positioned in the third outer ring groove in a threaded mode.
The outer diameter of the upper joint can be not larger than the outer diameter of the sliding sleeve, the outer diameter of the compression spring is the same as the outer diameter of the upper joint, and the compression force of the compression spring in the initial state is between 20kN and 30 kN.
The outer diameter of the central rod can be between 12mm and 14mm, the diameter of the central hole is between 6mm and 8mm, the number of the bypass holes is two, the diameters of the bypass holes are between 4mm and 6mm, and the width of the first outer ring groove in the up-down direction is not less than 160mm.
The distance between the upper end of the circular sleeve and the inner wall of the upper end of the first outer ring groove can be not less than 100mm, and a space is arranged between the lower end of the circular sleeve and the upper end of the storage cylinder.
The outer side surface of the lower end of the storage cylinder can be a conical surface with a large upper part and a small lower part, the outer diameter of the upper end of the storage cylinder is not larger than the outer diameter of the lower end of the conical cylinder, the length of the storage cylinder in the up-down direction is not smaller than 800mm, a plurality of ventilation holes communicated with the storage groove are distributed in the outer side of the upper part, the outer side of the middle part and the outer side of the lower part of the storage cylinder at intervals along the circumferential direction, and the diameter of each ventilation hole is between 8mm and 10 mm.
The outer side of the lower end of the center rod can be provided with a plurality of positioning counter bores with central axes distributed along the radial direction, the outer side of the lower end of the storage barrel corresponding to the position of each positioning counter bore is provided with a radial through positioning screw hole, and each positioning screw hole is internally and spirally connected with a positioning bolt with a screw rod end positioned in the corresponding positioning counter bore.
The second technical scheme of the invention is realized by the following measures: a scale cleaning method is carried out according to the following steps: the oil gas well production oil pipe scale cleaning device upper end is connected with the weighting rod and then is put down into the oil pipe, the cone scrapes the scale and peels off the inner wall of the oil pipe, the scraped scale is extruded into the storage barrel by the cone, when the oil gas well production oil pipe scale cleaning device lowering speed can not timely feed the scraped scale into the storage barrel, the cone moves upwards under the reaction of the scale and then extrudes the compression spring, then the compression spring acts on the cone and extrudes the scraped scale into the storage tank, when the oil pipe wall is more adhered with the scale, the scale below the center rod flows to the upper part of the device through the center hole and the bypass hole in the center rod, the smooth construction is ensured, the scale can be lifted up when the oil gas well production oil pipe scale cleaning device is difficult to lower, then the scale in the storage barrel is cleaned, and the next lowering cleaning operation is carried out.
The invention has reasonable and compact structure, can realize the dirty attached to the oil pipe wall of the gas well, provides necessary production channels for normal production of the gas well, effectively avoids well repair operation caused by the blockage of the dirty inside the oil pipe wall, simultaneously can carry out operation through a steel wire well testing vehicle, can carry out well entry construction only by matching with a weighting device, has extremely low input cost, effectively avoids the damage of chemical agent descaling to the oil pipe of the gas well, and is a convenient and quick gas well oil pipe wall dirty removing device, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.
Drawings
Fig. 1 is a schematic diagram of a front sectional structure of a first embodiment.
Fig. 2 is a schematic cross-sectional view of the first embodiment in operation.
Fig. 3 is a schematic cross-sectional view of the storage cylinder of the first embodiment when full of scale is stored.
Fig. 4 is an enlarged schematic view of the structure a in fig. 1.
The codes in the drawings are respectively: 1 is an upper joint, 2 is a central rod, 3 is a sliding sleeve, 4 is a cone, 5 is a compression spring, 6 is a storage cylinder, 7 is an upper C-shaped ring, 8 is a lower C-shaped ring, 9 is an upper fixing bolt, 10 is a lower fixing bolt, 11 is a positioning bolt, 12 is a storage tank, 13 is a central hole, 14 is a bypass hole, 15 is a first outer ring groove, and 16 is an air vent.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments can be determined according to the technical scheme and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of each component is described according to the layout manner of fig. 1 of the specification, for example: the positional relationship of the front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described below with reference to examples and figures:
embodiment one: as shown in figures 1, 2, 3 and 4, the scale cleaning device for the oil and gas well production oil pipe comprises an upper joint 1, a central rod 2, a sliding sleeve 3, a conical cylinder 4, a compression spring 5 and a storage cylinder 6, wherein the central rod 2 is vertically arranged, the outer side of the upper end is in sealing threaded connection with the inner side of the lower end of the upper joint 1 with internal threads on the inner side of the upper part, the lower end of the central rod 2 is provided with a central hole 13 with the upper end extending to the upper part of the central rod 2, a plurality of bypass holes 14 communicated with the upper part of the central hole 13 are circumferentially and alternately distributed on the outer side of the central rod 2 corresponding to the lower part of the upper joint 1, a first outer ring groove 15 is arranged on the outer side of the central rod 2 corresponding to the lower part of the bypass holes 14, the sliding sleeve 3 is sleeved in the first outer ring groove 15, an upper groove with an upward opening is arranged at the center of the upper end of the sliding sleeve 3, an upper C-shaped ring 7 tightly sleeved on the outer side of the central rod 2 is fixedly arranged in the upper groove, the compression spring 5 with the lower end propped against the upper end of the upper C-shaped ring 7 is sleeved outside the central rod 2 corresponding to the lower side position of the upper joint 1, a lower groove with a downward opening is arranged in the center of the lower end of the sliding sleeve 3, a lower C-shaped ring 8 tightly sleeved outside the central rod 2 is fixedly arranged in the lower groove, the lower end of the lower C-shaped ring 8 is propped against the side wall of the lower end of the first outer ring groove 15, a cone 4 with a small upper part and a big lower part is fixedly arranged outside the upper part of the sliding sleeve 3, a storage cylinder 6 with a cylindrical structure and a closed upper end opening and lower end is arranged outside the central rod 2 corresponding to the lower position of the sliding sleeve 3, a threaded through hole penetrating up and down is arranged in the center of the lower end of the storage cylinder 6, the outer side of the lower end of the central rod 2 is in the threaded through hole in a spiro union mode, and a storage groove 12 is formed between the inner side of the storage cylinder 6 and the outer side of the central rod 2.
According to the demand, top connection 1 upper end can be with aggravate device lug connection, and sliding sleeve 3 and a cone 4 an organic whole set up, and the external diameter of cone 4 lower extreme is 10mm with the difference of oil pipe internal diameter, and the cone angle of cone 4 is 60 degrees, and the wall thickness of storage section of thick bamboo 6 is 2.5mm, and upper C type ring 7 and lower C type ring 8 are current known technique, like the snap ring for the axle. In the use, through setting up top connection 1, be convenient for be connected with aggravating the device, improve dismouting efficiency, through setting up C type ring 7 and lower C type ring 8, can be convenient for install sliding sleeve 3 with first outer annular 15 in, through setting up awl section of thick bamboo 4, can scrape the dirty thing of oil pipe inner wall to holding tank 12 in, through setting up centre bore 13 and bypass hole 14, the fluid accessible centre bore 13 and the bypass hole 14 of lower part flows to top connection 1 upper portion, can guarantee that the construction goes on smoothly. The invention can realize the dirty attached to the wall of the oil pipe of the gas well, provides necessary production channels for normal production of the gas well, effectively avoids well repair operation caused by the blockage of the dirty inside the oil pipe wall, simultaneously can carry out operation through the steel wire well testing vehicle, can carry out well entry construction only by matching with a weighting device, has extremely low input cost, effectively avoids the damage of chemical agent descaling to the oil pipe of the gas well, and is a convenient and quick well oil pipe wall descaling device. The invention has reasonable and compact structure, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.
The scale cleaning device for the oil and gas well production oil pipe can be further optimized or/and improved according to actual needs:
as shown in fig. 1, 2, 3 and 4, the outer side of the middle part of the upper C-shaped ring 7 is provided with a second outer ring groove, a plurality of radially penetrating upper threaded holes are distributed at intervals along the circumferential direction on the outer side of the upper end of the sliding sleeve 3 corresponding to the position of the second outer ring groove, each upper threaded hole is screwed with an upper fixing bolt 9 with a screw end positioned in the second outer ring groove, the outer side of the middle part of the lower C-shaped ring 8 is provided with a third outer ring groove, a plurality of radially penetrating lower threaded holes are distributed at intervals along the circumferential direction on the outer side of the lower end of the sliding sleeve 3 corresponding to the position of the third outer ring groove, and each lower threaded hole is screwed with a lower fixing bolt 10 with a screw end positioned in the third outer ring groove.
In the use, through this setting, can be with the reliable fixed together of last C type ring 7 and lower C type ring 8, make sliding sleeve 3 reciprocate in first outer annular 15, also be convenient for dismouting maintenance.
As shown in fig. 1, 2 and 3, the outer diameter of the upper joint 1 is not larger than the outer diameter of the sliding sleeve 3, the outer diameter of the compression spring 5 is the same as the outer diameter of the upper joint 1, and the compression force of the initial state of the compression spring 5 is between 20kN and 30 kN.
The limit state compression force of the compression spring 5 is not less than 60kN according to the requirement. In the use process, when the lowering speed can not meet the requirement that the scraped dirt timely enters the storage cylinder 6, the cone cylinder 4 ascends to compress the spring 5 under the action of the counter force of the dirt attached to the oil pipe wall, and descends to extrude the scraped dirt into the storage tank 12 under the action of the compression spring 5 in the lowering process, so that the dirt on the oil pipe wall is scraped clean.
As shown in fig. 1, 2 and 3, the outer diameter of the central rod 2 is between 12mm and 14mm, the diameter of the central hole 13 is between 6mm and 8mm, the number of bypass holes 14 is two, the diameters of the bypass holes are between 4mm and 6mm, and the width of the first outer ring groove 15 in the up-down direction is not less than 160mm.
In the use, through this setting, can prevent to block up the oil pipe internal diameter when the device is lowered in the work progress, the combination of centre bore 13 and bypass hole 14 has realized the upper and lower UNICOM of instrument.
As shown in fig. 1, 2 and 3, the distance between the upper end of the circular sleeve and the inner wall of the upper end of the first outer ring groove 15 is not less than 100mm, and a space is arranged between the lower end of the circular sleeve and the upper end of the storage cylinder 6.
According to the requirement, the interval between the lower end of the round sleeve and the upper end of the storage cylinder 6 is 120mm. In the use process, oil pipe wall dirty objects can be scraped into the storage groove 12 easily, the distance between the upper end of the round sleeve and the inner wall of the upper end of the first outer annular groove 15 is not smaller than 100mm, the up-and-down movement distance of the cylinder in the first outer annular groove 15 can be ensured, and the descaling efficiency is improved.
As shown in fig. 1, 2 and 3, the outer side surface of the lower end of the storage cylinder 6 is a conical surface with a large upper part and a small lower part, the outer diameter of the upper end of the storage cylinder 6 is not larger than the outer diameter of the lower end of the conical cylinder 4, the length of the storage cylinder 6 in the vertical direction is not smaller than 800mm, a plurality of ventilation holes 16 communicated with the storage groove 12 are distributed on the outer side of the upper part, the outer side of the middle part and the outer side of the lower part of the storage cylinder 6 at intervals along the circumferential direction, and the diameter of the ventilation holes 16 is between 8mm and 10 mm.
According to the requirement, the cone angle of the conical surface with the upper large and the lower small on the outer side surface of the lower end of the storage cylinder 6 is 60 degrees, and the outer diameter of the storage cylinder 6 is slightly smaller than the outer diameter of the lower end of the conical cylinder 4. In the use, the conical surface that is big-end-up is in the outer side of storage section of thick bamboo 6 lower extreme, can play the guide effect, and the external diameter of storage section of thick bamboo 6 is not greater than the external diameter of cone section of thick bamboo 4 lower extreme can extrude the scale thing of scraping into storage tank 12, and cone section of thick bamboo 4 scrapes the scale thing to the setting of bleeder vent 16 in the storage tank 12 can prevent that gas from taking up storage tank 12 space and reducing storage tank 12's capacity.
As shown in fig. 1, 2 and 3, a plurality of positioning counter bores with central axes distributed along the radial direction are arranged on the outer side of the lower end of the central rod 2 along the circumferential direction, positioning screw holes which are penetrated in the radial direction are arranged on the outer side of the lower end of the storage cylinder 6 corresponding to the positions of each positioning counter bore, and positioning bolts 11 with screw ends positioned in the positioning counter bores at the corresponding positions are screwed in each positioning screw hole.
Through such a setting, the center rod 2 and the storage cylinder 6 can be firmly fixed together in the use process, the storage cylinder 6 is prevented from falling down to influence the subsequent process in the descaling process, and the reliability is improved.
Embodiment two: as shown in figures 1, 2, 3 and 4, the scale cleaning method is carried out according to the following steps: the upper end of the oil-gas well production oil pipe scale cleaning device is connected with a weighting rod or the weighting device and then is placed into the oil pipe, under the action of gravity, the scale is scraped and stripped from the inner wall of the oil pipe, the scraped scale is extruded into the storage cylinder 6 by the cone cylinder 4, when the oil-gas well production oil pipe scale cleaning device is placed at a speed that the scraped scale cannot timely enter the storage cylinder 6, the cone cylinder 4 moves upwards under the action of the scale attached to the oil pipe wall and then extrudes the compression spring 5, then the compression spring 5 acts on the cone cylinder 4 after compression deformation and extrudes the scraped scale into the storage tank 12, when the oil pipe wall is more attached to the scale, the scale below the device flows to the upper part of the device through the central hole 13 and the bypass hole 14 in the central rod 2, the construction is guaranteed to be smoothly carried out, when the oil-gas well production oil pipe scale cleaning device is placed difficultly, the storage tank 12 is indicated to be full of scale, at the moment, the device can be lifted upwards, and the scale inside the storage cylinder 6 is placed again and cleaned.
The working principle of the invention is as follows: in the production process of a gas well, certain scale substances are generated on the inner wall of a production oil pipe along with the change of formation produced water and the action of injecting certain chemical agents into the well, and the inner wall of the production oil pipe is blocked when serious, so that the gas well cannot be normally produced, the tool is lowered into the oil pipe through scraping and storing principles by matching with a weighting device, because the outer diameter of a cone 4 in the device is slightly smaller than the inner diameter of the oil pipe, the scale substances can be scraped and peeled off from the inner wall of the oil pipe when the scale substances are adhered to the inner wall of the oil pipe under the action of gravity of the weighting device in the lowering process, the scraped scale substances can be extruded into the storage cylinder 6 because the outer diameter of the storage cylinder 6 is slightly smaller than the outer diameter of the cone 4, and when the scraped scale substances cannot be timely fed into the storage cylinder 6 at the lowering speed, the cone 4 goes up compression spring 5 under the effect of the dirty object reaction force attached to the oil pipe wall to go down under the effect of compression spring 5 in the process of transferring and will scrape the dirty object after peeling off and extrude into holding tank 12, compression spring 5 plays the cushioning effect, avoid dirty object to lead to the fact the destruction to cone 4, when aggravate device and this device are transferred and are encountered the oil pipe wall and attach dirty object more, this device and oil pipe inner wall are blocked up completely and influence this device and transfer down, at this moment, the fluid of this device lower part can flow to this device upper portion through the centre bore 13 and the bypass hole 14 of centre pole 2 inside, form this device upper and lower part intercommunication, can guarantee that the construction goes on smoothly, after storing full dirty object in holding tank 12, transfer down difficulty, alright lift this device up, clear up the inside dirty object of holding tank 6, transfer cleaning operation once more.
The technical characteristics form the embodiment of the invention, have stronger adaptability and implementation effect, and can increase or decrease unnecessary technical characteristics according to actual needs so as to meet the requirements of different situations.
Claims (10)
1. The utility model provides an oil gas well production oil pipe scale removal device, a serial communication port, the characteristics include the top connection, the center pole, the sliding sleeve, a cone section of thick bamboo, compression spring and storage section of thick bamboo, the center pole is vertical setting and the top connection lower extreme inboard sealed spiro union that has the internal thread in the upper end outside and the upper portion inboard, the center pole lower extreme is equipped with the centre bore that the upper end extends to center pole upper portion, the center pole outside that corresponds top connection below position along circumference interval distribution has a plurality of by-pass hole with centre bore upper portion intercommunication, the center pole outside that corresponds by-pass hole below position is equipped with first outer annular, the sliding sleeve suit is in first outer annular, the upper end central authorities are equipped with the upper groove that the opening was upwards, upper groove internal fixation has the last C type ring that tightly suit is in the center pole outside, the compression spring that the lower extreme and the upper C type ring upper end were tight in the cover is equipped with in the center pole outside cover of corresponding top of top connection downside position, the lower groove internal fixation has the lower C type ring that tightly in the lower groove, lower C type ring lower extreme and first outer annular groove are tightly in the lower groove, the lower groove internal fixation is equipped with the cone section of thick bamboo outside the lower side of thick bamboo is equipped with the centre groove that the centre bore is tightly suited in the outside the centre groove that the opening is formed between the outside of the inside of the storage section of thick bamboo, the storage section of thick bamboo outside that corresponds the upper end that the upper end is equipped with the opening between the inside the cylinder section of thick bamboo.
2. The oil-gas well production oil pipe scale cleaning device according to claim 1, wherein a second outer annular groove is arranged on the outer side of the middle part of the upper C-shaped ring, a plurality of radially penetrating upper threaded holes are distributed on the outer side of the upper end of the sliding sleeve corresponding to the position of the second outer annular groove at intervals along the circumferential direction, an upper fixing bolt with a screw end positioned in the second outer annular groove is screwed into each upper threaded hole, a third outer annular groove is arranged on the outer side of the middle part of the lower C-shaped ring, a plurality of radially penetrating lower threaded holes are distributed on the outer side of the lower end of the sliding sleeve corresponding to the position of the third outer annular groove at intervals along the circumferential direction, and a lower fixing bolt with a screw end positioned in the third outer annular groove is screwed into each lower threaded hole; or/and the outer diameter of the upper joint is not larger than the outer diameter of the sliding sleeve, the outer diameter of the compression spring is the same as the outer diameter of the upper joint, and the compression force of the compression spring in the initial state is between 20kN and 30 kN.
3. The oil and gas well production oil pipe scale removal device according to claim 1 or 2, wherein the outer diameter of the central rod is between 12mm and 14mm, the diameter of the central hole is between 6mm and 8mm, the number of the bypass holes is two, the diameters of the bypass holes are between 4mm and 6mm, and the width of the first outer ring groove in the up-down direction is not less than 160mm.
4. The oil-gas well production oil pipe scale cleaning device according to claim 3, wherein the distance between the upper end of the round sleeve and the inner wall of the upper end of the first outer ring groove is not less than 100mm, and a space is arranged between the lower end of the round sleeve and the upper end of the storage cylinder.
5. The scale remover for oil and gas well production oil pipe according to claim 1, 2 or 4, wherein the outer side surface of the lower end of the storage cylinder is a conical surface with a large upper part and a small lower part, the outer diameter of the upper end of the storage cylinder is not larger than the outer diameter of the lower end of the conical cylinder, the length of the storage cylinder in the vertical direction is not smaller than 800mm, a plurality of ventilation holes communicated with the storage groove are distributed on the outer side of the upper part, the outer side of the middle part and the outer side of the lower part of the storage cylinder at intervals along the circumferential direction, and the diameter of each ventilation hole is between 8mm and 10 mm.
6. The scale removal device for the production oil pipe of the oil and gas well according to claim 3, wherein the outer side surface of the lower end of the storage cylinder is a conical surface with a large upper part and a small lower part, the outer diameter of the upper end of the storage cylinder is not larger than the outer diameter of the lower end of the conical cylinder, the length of the storage cylinder in the vertical direction is not smaller than 800mm, a plurality of ventilation holes communicated with the storage groove are distributed on the outer side of the upper part, the outer side of the middle part and the outer side of the lower part of the storage cylinder at intervals along the circumferential direction, and the diameter of each ventilation hole is between 8mm and 10 mm.
7. The scale remover for oil and gas well production oil pipes according to claim 1, 2, 4 or 6, wherein a plurality of positioning counter bores with central axes distributed along radial direction are arranged on the outer side of the lower end of the central rod along the circumferential direction, positioning screw holes which are penetrated in radial direction are arranged on the outer side of the lower end of the storage cylinder corresponding to the positions of each positioning counter bore, and positioning bolts with screw ends positioned in the positioning counter bores at the corresponding positions are screwed in each positioning screw hole.
8. The oil-gas well production oil pipe scale cleaning device according to claim 3, wherein the outer side of the lower end of the central rod is provided with a plurality of positioning counter bores with central axes distributed along the radial direction along the circumferential direction, the outer side of the lower end of the storage cylinder corresponding to the position of each positioning counter bore is provided with a positioning screw hole which is penetrated in the radial direction, and each positioning screw hole is internally and spirally connected with a positioning bolt with a screw rod end positioned in the positioning counter bore at the corresponding position.
9. The oil-gas well production oil pipe scale cleaning device according to claim 5, wherein the outer side of the lower end of the central rod is provided with a plurality of positioning counter bores with central axes distributed along the radial direction along the circumferential direction, the outer side of the lower end of the storage cylinder corresponding to the position of each positioning counter bore is provided with a positioning screw hole which is penetrated in the radial direction, and each positioning screw hole is internally and spirally connected with a positioning bolt with a screw rod end positioned in the positioning counter bore at the corresponding position.
10. A method for cleaning scale using the oil and gas well production tubing scale cleaning device as claimed in claim 7 or 8 or 9, characterized by comprising the following steps: the oil gas well production oil pipe scale cleaning device upper end is connected with the weighting rod and then is put down into the oil pipe, the cone scrapes the scale and peels off the inner wall of the oil pipe, the scraped scale is extruded into the storage barrel by the cone, when the oil gas well production oil pipe scale cleaning device lowering speed can not timely feed the scraped scale into the storage barrel, the cone moves upwards under the reaction of the scale and then extrudes the compression spring, then the compression spring acts on the cone and extrudes the scraped scale into the storage tank, when the oil pipe wall is more adhered with the scale, the scale below the center rod flows to the upper part of the device through the center hole and the bypass hole in the center rod, the smooth construction is ensured, the scale can be lifted up when the oil gas well production oil pipe scale cleaning device is difficult to lower, then the scale in the storage barrel is cleaned, and the next lowering cleaning operation is carried out.
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| CN202111334557.5A CN116104447B (en) | 2021-11-11 | 2021-11-11 | Scale removing device and method for oil and gas well production oil pipe |
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| CN202111334557.5A CN116104447B (en) | 2021-11-11 | 2021-11-11 | Scale removing device and method for oil and gas well production oil pipe |
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| CN116104447B CN116104447B (en) | 2024-08-27 |
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| CN116104447B (en) | 2024-08-27 |
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