CN117738619A - Oil pipe scale remover and oil pipe scale removing system - Google Patents

Abstract

The utility model relates to the technical field of devices for cleaning boreholes, in particular to an oil pipe scale remover and an oil pipe scale removing system, wherein the oil pipe scale removing system comprises an oil pipe scale remover, the oil pipe scale remover comprises a scraping part, the scraping part is provided with at least two stages along the up-down direction, and the scraping range of the scraping part close to the upper stage is larger than that of the scraping part close to the lower stage in the adjacent two stages of scraping parts; the multi-layer scraping can be realized, and the scale layer required to be scraped by each scraping part cannot be too thick, so that the scraping resistance is reduced, the smoothness of scraping is ensured, and the scraping efficiency is improved.

Description

Oil pipe scale remover and oil pipe scale removing system

Technical Field

The utility model relates to the technical field of devices for cleaning wellbores, in particular to an oil pipe scaler and an oil pipe descaling system.

Background

In the petroleum and natural gas exploitation process, oil pipe scaling phenomenon often occurs, especially in the production of high sulfur-bearing gas wells and high wax oil wells, in the process that oil gas flows from oil pipes to the ground, along with gradual decrease of shaft pressure and temperature, the solubility of sulfur or wax in the oil gas can gradually decrease and separate out, and is influenced by viscous force to adhere to the inner wall of the oil pipe, along with the extension of production time, the sulfur or wax adhered to the inner wall of the oil pipe can be increased and thicker, so that the inner diameter of the oil pipe becomes smaller and smaller, even the oil pipe channel is blocked, and the yield of the oil gas well is reduced or even stopped. Therefore, in order to enable the oil well to produce normally, a tubing cleaner is often used to scrape and remove the oil tubing.

An oil pipe scraper for steel wire operation is disclosed in Chinese patent publication No. CN201857938U, which mainly comprises a salvage neck, a scraping body and scraping teeth, wherein a plurality of scraping teeth are distributed on the outer wall of the scraping body, the scraping body and the scraping teeth on the scraping body form a scraping part, the scraping body and the scraping teeth are axially projected and an envelope circle enveloping the projection is formed, the area of the envelope circle forms the scraping range of the scraping part, and the scraping range of the scraping part is the range to which the scraping teeth can cut; in the oil pipe scraping operation process, the whole scraper is pulled by the steel wire to scrape the inner wall of the oil pipe, scraping teeth repeatedly scrape, and impurities which remain on the wall of the underground oil pipe and prevent construction operation are removed.

However, in the case of serious scaling, thicker scale is formed on the inner wall of the oil pipe, and the scraping teeth and the scale contact area in the scraping process are larger because the scraping force of the scraper caused by the gravity of the tool is smaller, so that larger scraping resistance can be generated, the scale removal efficiency is affected, and the scale removal cannot be smoothly performed when the scale removal efficiency is serious.

Disclosure of Invention

The utility model aims to provide an oil pipe scaler, which solves the problem that the existing oil pipe scaler cannot be well applied to the severe scaling condition; the utility model aims to provide an oil pipe descaling system, which aims to solve the problem that the existing oil pipe descaling system cannot be well applied to the situation of serious scaling.

The technical scheme of the oil pipe scaler is as follows:

the utility model provides an oil pipe scale remover, includes scraping portion, and scraping portion is equipped with at least two-stage along the upper and lower direction, in the adjacent two-stage scraping portion, the scraping scope of the scraping portion of the last level is greater than the scraping scope of the scraping portion of the next level.

The beneficial effects are that: through setting up the scraping portion at different levels of scraping scope for the scraping scope of scraping portion at all levels from the top down reduces step by step, when carrying out the scale removal to oil pipe, along with the downgoing removal of oil pipe scale remover in oil pipe, can utilize the scraping portion that the scraping scope is less down to scrape one deck earlier, and the scraping portion that the scraping scope is great that the reuse is higher immediately scrapes one deck again, realizes the layering and scrapes, and the scale layer that the scraping portion of every level needs to scrape can not be too thick, thereby is favorable to reducing the scraping resistance, guarantees to scrape smoothly, improves scraping efficiency.

Further, the scraping portion comprises a central shaft, a sliding sleeve and a scraper fixed on the sliding sleeve, the sliding sleeve is arranged on the central shaft in a sliding mode, a vibrating portion is arranged on the upper side of the sliding sleeve on the central shaft, the vibrating portion is used for vibrating the sliding sleeve when the central shaft moves downwards relative to the sliding sleeve, a blocking structure is arranged on the lower side of the sliding sleeve on the central shaft, the central shafts of the scraping portions at all levels are connected end to end, and the sliding stroke length of the sliding sleeve of each scraping portion at all levels is gradually reduced from top to bottom.

The beneficial effects are that: through arranging the sliding sleeve on the central shaft, when the oil pipe is descaled, the central shaft can be lifted up to enable the mandrel to move upwards relative to the sliding sleeve, then the sliding sleeve is impacted downwards under the gravity and inertia action of the central shaft, the sliding sleeve is vibrated to enable the scraper on the sliding sleeve to scrape downwards, which is beneficial to increasing scraping force, meanwhile, as the scale close to the inner wall of the oil pipe is larger, the binding force is larger, the scraper is harder to cut, and the scale close to the inner wall of the oil pipe is scraped by the scraper which is arranged higher, so that the length of the central shaft of each scraping part is gradually reduced from top to bottom, as the operation of lifting up the central shaft is continuously carried out, the central shaft which is arranged lower moves upwards to a limit position relative to the corresponding sliding sleeve and then moves upwards together, the central shaft arranged on the upper side still moves relatively to the corresponding sliding sleeve at the moment, namely the upward moving travel of the lower sliding sleeve is larger, so that when the vibrating part of the upper scraping part is vibrated onto the corresponding sliding sleeve during downward impact, the sliding sleeve and the central shaft of the scraping part arranged on the lower side still keep falling trend, and thus, the dead weight and inertia of the lower scraping part are utilized to generate larger impact force on the upper scraping part, and the larger the upper scraping part is, the larger the downward impact force on the sliding sleeve is, so that the scraping part arranged on the upper side is ensured to smoothly scrape the scale layer which is closer to the inner wall of the oil pipe.

Further, one of the two adjacent central shafts is provided with external threads, the other is provided with a threaded hole, the threaded hole is internally provided with internal threads which are in adaptive connection with the external threads, and the apertures of the threaded holes of the central shafts are the same for the threaded connection of any two central shafts.

The beneficial effects are that: the central shaft of each scraping part has the same specification of internal threads and external threads, so that different scraping parts can be selected for combination according to the use requirement, and the use is flexible.

Further, the central shaft is provided with an axially extending drainage groove, and the drainage grooves on the central shafts of all stages are communicated.

The beneficial effects are that: through setting up the drainage groove for keep the space between sliding sleeve and the center pin, utilize the space that link up from top to bottom, can supply the dirty of scraping to carry away from the drainage groove, simultaneously, can keep scraping portion upper and lower both sides space intercommunication when scraping portion and oil pipe dirty contact completely and form sealedly, prevent to form pressure differential and cause the top drill, moreover, when oil pipe scale remover can't unclamp in oil pipe, the drainage groove still can be as the passageway of pumping into the dissolving agent.

Further, the scraping portion includes a fixed body and a scraper fixed on the fixed body, and the radial dimension of the fixed body of each stage of the scraping portion is gradually reduced along the axial direction.

The beneficial effects are that: the radial dimension of the fixing body is reduced step by step, so that the scraping range of each level of scraping part is conveniently reduced step by step.

Further, the oil pipe cleaning device further comprises a brushing part, wherein the brushing part comprises a cleaning brush which is used for being in contact with the inner wall of the oil pipe.

The beneficial effects are that: through setting up the brush portion of sweeping, scrape the portion and cut the back of cleaing away the dirty on the oil pipe inner wall, leave over the tiny dirty on the oil pipe inner wall, the accessible is cleaned the brush and is fallen into the shaft bottom.

Further, the brushing part comprises a sliding rod and a spring sleeved on the sliding rod, more than two cleaning brushes are arranged, and each cleaning brush is fixed on the spring.

The beneficial effects are that: the cleaning brush is fixed on the spring, and the elastic deformation of the spring is utilized, so that the cleaning brush is prevented from being stuck.

Further, the doctor blade has a wedge-shaped end facing downwards.

The beneficial effects are that: when the scraper cuts the scale on the inner wall of the oil pipe downwards, the wedge-shaped end can provide not only vertical downward cutting force, but also cutting force in the circumferential direction, so that the cutting effect is improved.

Further, a guide cone is arranged at the tail end of the oil pipe cleaner, and the guide cone is a cone with a downward tip.

The beneficial effects are that: through setting up the guide cone at the end, can guide the removal of oil pipe scale remover in oil pipe, reduce the descending resistance of oil pipe scale remover.

The technical scheme of the oil pipe descaling system is as follows:

the utility model provides an oil pipe scale removal system, includes carries and puts device and oil pipe scale remover, carries and puts the device and put the connecting piece that is used for connecting oil pipe scale remover, carries and put the device and be used for lifting or lower oil pipe scale remover, oil pipe scale remover includes scraping portion, and scraping portion is equipped with at least two-stage along the upper and lower direction, in the adjacent two-stage scraping portion, the scraping scope of leaning on the scraping portion of upper order is greater than the scraping scope of leaning on the scraping portion of next order.

The beneficial effects are that: through setting up the scraping portion at different levels of scraping scope for the scraping scope of scraping portion at all levels from the top down reduces step by step, when carrying out the scale removal to oil pipe, along with the downgoing removal of oil pipe scale remover in oil pipe, can utilize the scraping portion that the scraping scope is less down to scrape one deck earlier, and the scraping portion that the scraping scope is great that the reuse is higher immediately scrapes one deck again, realizes the layering and scrapes, and the scale layer that the scraping portion of every level needs to scrape can not be too thick, thereby is favorable to reducing the scraping resistance, guarantees to scrape smoothly, improves scraping efficiency.

Further, the scraping portion comprises a central shaft, a sliding sleeve and a scraper fixed on the sliding sleeve, the sliding sleeve is arranged on the central shaft in a sliding mode, a vibrating portion is arranged on the upper side of the sliding sleeve on the central shaft, the vibrating portion is used for vibrating the sliding sleeve when the central shaft moves downwards relative to the sliding sleeve, a blocking structure is arranged on the lower side of the sliding sleeve on the central shaft, the central shafts of the scraping portions at all levels are connected end to end, and the sliding stroke length of the sliding sleeve of each scraping portion at all levels is gradually reduced from top to bottom.

The beneficial effects are that: through arranging the sliding sleeve on the central shaft, when the oil pipe is descaled, the central shaft can be lifted up to enable the mandrel to move upwards relative to the sliding sleeve, then the sliding sleeve is impacted downwards under the gravity and inertia action of the central shaft, the sliding sleeve is vibrated to enable the scraper on the sliding sleeve to scrape downwards, which is beneficial to increasing scraping force, meanwhile, as the scale close to the inner wall of the oil pipe is larger, the binding force is larger, the scraper is harder to cut, and the scale close to the inner wall of the oil pipe is scraped by the scraper which is arranged higher, so that the length of the central shaft of each scraping part is gradually reduced from top to bottom, as the operation of lifting up the central shaft is continuously carried out, the central shaft which is arranged lower moves upwards to a limit position relative to the corresponding sliding sleeve and then moves upwards together, the central shaft arranged on the upper side still moves relatively to the corresponding sliding sleeve at the moment, namely the upward moving travel of the lower sliding sleeve is larger, so that when the vibrating part of the upper scraping part is vibrated onto the corresponding sliding sleeve during downward impact, the sliding sleeve and the central shaft of the scraping part arranged on the lower side still keep falling trend, and thus, the dead weight and inertia of the lower scraping part are utilized to generate larger impact force on the upper scraping part, and the larger the upper scraping part is, the larger the downward impact force on the sliding sleeve is, so that the scraping part arranged on the upper side is ensured to smoothly scrape the scale layer which is closer to the inner wall of the oil pipe.

Further, one of the two adjacent central shafts is provided with external threads, the other is provided with a threaded hole, the threaded hole is internally provided with internal threads which are in adaptive connection with the external threads, and the apertures of the threaded holes of the central shafts are the same for the threaded connection of any two central shafts.

The beneficial effects are that: the central shaft of each scraping part has the same specification of internal threads and external threads, so that different scraping parts can be selected for combination according to the use requirement, and the use is flexible.

Further, the central shaft is provided with an axially extending drainage groove, and the drainage grooves on the central shafts of all stages are communicated.

The beneficial effects are that: through setting up the drainage groove for keep the space between sliding sleeve and the center pin, utilize the space that link up from top to bottom, can supply the dirty of scraping to carry away from the drainage groove, simultaneously, can keep scraping portion upper and lower both sides space intercommunication when scraping portion and oil pipe dirty contact completely and form sealedly, prevent to form pressure differential and cause the top drill, moreover, when oil pipe scale remover can't unclamp in oil pipe, the drainage groove still can be as the passageway of pumping into the dissolving agent.

Further, the scraping portion includes a fixed body and a scraper fixed on the fixed body, and the radial dimension of the fixed body of each stage of the scraping portion is gradually reduced along the axial direction.

The beneficial effects are that: the radial dimension of the fixing body is reduced step by step, so that the scraping range of each level of scraping part is conveniently reduced step by step.

Further, the oil pipe cleaning device further comprises a brushing part, wherein the brushing part comprises a cleaning brush which is used for being in contact with the inner wall of the oil pipe.

The beneficial effects are that: through setting up the brush portion of sweeping, scrape the portion and cut the back of cleaing away the dirty on the oil pipe inner wall, leave over the tiny dirty on the oil pipe inner wall, the accessible is cleaned the brush and is fallen into the shaft bottom.

Further, the brushing part comprises a sliding rod and a spring sleeved on the sliding rod, more than two cleaning brushes are arranged, and each cleaning brush is fixed on the spring.

The beneficial effects are that: the cleaning brush is fixed on the spring, and the elastic deformation of the spring is utilized, so that the cleaning brush is prevented from being stuck.

Further, the doctor blade has a wedge-shaped end facing downwards.

The beneficial effects are that: when the scraper cuts the scale on the inner wall of the oil pipe downwards, the wedge-shaped end can provide not only vertical downward cutting force, but also cutting force in the circumferential direction, so that the cutting effect is improved.

Further, a guide cone is arranged at the tail end of the oil pipe cleaner, and the guide cone is a cone with a downward tip.

The beneficial effects are that: through setting up the guide cone at the end, can guide the removal of oil pipe scale remover in oil pipe, reduce the descending resistance of oil pipe scale remover.

Drawings

FIG. 1 is a schematic diagram of the oil tube scaler of the present utility model;

fig. 2 is a schematic cross-sectional view of the first stage scraping portion of fig. 1.

In the figure: 1. an upper joint; 21. a slide bar head; 22. a slide bar; 23. a spring; 24. a cleaning brush; 31. a first-stage vibration hammer; 32. a first-stage vibrating hammer drainage groove; 33. a first stage shaft; 34. a first-stage shaft drainage groove; 41. a first stage sliding sleeve; 42. a first stage scraper; 51. a second-stage vibration hammer; 52. a second-stage vibrating hammer drainage groove; 53. a second stage shaft; 54. a second-stage shaft drainage groove; 61. a second stage sliding sleeve; 62. a second stage scraper; 71. a third-stage vibration hammer; 72. third-stage vibrating hammer drainage groove; 73. a third stage shaft; 74. a third-stage shaft drainage groove; 81. a third stage sliding sleeve; 82. a third stage scraper; 91. a guide cone; 92. and a guide cone drainage groove.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

It is noted that relational terms such as "first" and "second" and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the possible occurrence of the phrase "comprising one … …" or the like does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

In the description of the present utility model, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; either directly, indirectly through intermediaries, or in communication with the interior of the two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.

In the description of the present utility model, unless explicitly stated and limited otherwise, the term "provided" as may occur, for example, as an object of "provided" may be a part of a body, may be separately arranged from the body, and may be connected to the body, and may be detachably connected or may be non-detachably connected. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art in specific cases.

The present utility model is described in further detail below with reference to examples.

Example 1 of the tubing sealer of the present utility model:

as shown in fig. 1 and 2, the oil pipe cleaner has an axial direction extending up and down and a radial direction perpendicular to the axial direction, the oil pipe cleaner comprises an upper joint 1, a brushing part, a scraping part and a guide cone 91, the brushing part comprises a sliding rod 22, a spring 23 and a cleaning brush 24, three stages of scraping parts are respectively arranged along the axial direction of the oil pipe cleaner, namely a first stage scraping part, a second stage scraping part and a third stage scraping part, and each stage of scraping part is correspondingly arranged on each stage of central shaft. The first-stage scraping part comprises a first-stage central shaft, a first-stage sliding sleeve 41 and a first-stage scraper 42, the second-stage scraping part comprises a second-stage central shaft, a second-stage sliding sleeve 61 and a second-stage scraper 62, and the third-stage scraping part comprises a third-stage central shaft, a third-stage sliding sleeve 81 and a third-stage scraper 82, and each-stage scraper is used for scraping scale on the inner wall of an oil pipe.

The slide bar 22 includes slide bar head 21, suit portion and connecting portion, and slide bar head 21 is the annular boss of setting in slide bar 22 upper end, and slide bar head 21 external diameter is greater than the external diameter of top connection 1, and the lower extreme of top connection 1 welds on slide bar head 21's up end. The connecting part is arranged at the lower end of the slide bar 22, and is provided with a threaded hole. The outer diameter of the sleeve part is smaller than the outer diameters of the club head 21 and the connecting part. The spring 23 is fitted over the fitting portion of the slide bar 22 and is located between the slide bar head 21 and the connecting portion. The cleaning brush 24 is a steel wire brush, the cleaning brush 24 is welded on the outer peripheral surface of the spring 23, the cleaning brush 24 is provided with a plurality of columns along the circumferential direction, and each column is provided with a plurality of cleaning brushes along the up-down direction at intervals. The cleaning brush 24 extends outwards along the radial direction of the oil pipe cleaner, the cleaning brush 24 is used for contacting with the inner wall of the oil pipe, the cleaning brush 24 can rotationally slide relative to the sliding rod 22, so that after the scraper cuts the scale on the inner wall of the oil pipe, the small scale left on the inner wall of the oil pipe is cleaned by the cleaning brush 24 and falls into the bottom of the well, and the elastic deformation of the spring 23 is utilized, so that the cleaning brush 24 is prevented from being blocked.

The first-stage center pin includes first-stage axle 33 and first-stage vibration hammer 31, and first-stage axle 33 and first-stage vibration hammer 31 are integrated into one piece structure, and first-stage vibration hammer 31 sets up in the upside of first-stage axle 33, and first-stage vibration hammer 31 includes the portion of jolting and screw thread section, and the external diameter of the portion of jolting is greater than the external diameter of first-stage axle 33, and the upper end excircle of the portion of jolting is equipped with the chamfer, prevents to carry the card. The screw thread section of the first-stage vibration hammer 31 is arranged on the upper end surface of the vibration part, the screw thread section is provided with external screw threads, and the screw thread section on the first-stage vibration hammer 31 is in screw thread connection with the screw thread hole on the slide rod 22. A screw hole extending vertically is provided in the lower end surface of the first-stage shaft 33.

The second-stage center shaft comprises a second-stage shaft 53 and a second-stage vibrating hammer 51, the second-stage shaft 53 and the second-stage vibrating hammer 51 are of an integrated structure, the second-stage vibrating hammer 51 is arranged on the upper side of the second-stage shaft 53, the second-stage vibrating hammer 51 comprises a vibrating portion and a threaded section, the outer diameter of the vibrating portion is larger than that of the second-stage shaft 53, the threaded section is arranged on the upper end face of the vibrating portion, a chamfer is arranged on the outer circle of the upper side of the vibrating portion, and the threaded section on the second-stage vibrating hammer 51 is in threaded connection with a threaded hole at the lower end of the first-stage shaft 33. A screw hole extending up and down is provided in the lower end surface of the second-stage shaft 53.

The tertiary center pin includes tertiary axle 73 and tertiary vibration hammer 71, tertiary axle 73 and tertiary vibration hammer 71 structure as an organic whole, and tertiary vibration hammer 71 sets up in the upside of tertiary axle 73, and tertiary vibration hammer 71 includes the portion of jolting and screw thread section, and the external diameter of portion of jolting is greater than the external diameter of first level axle 33, and the upside excircle of portion of jolting is equipped with the chamfer, and the screw thread section sets up on the up end of portion of jolting, screw thread section on the tertiary vibration hammer 71 and the screw hole threaded connection on the second level axle 53. A threaded hole is formed in the lower end surface of the third-stage shaft 73.

The guide cone 91 is a cone with a downward tip, the guide cone 91 comprises a cone portion and a thread section, the cone portion is provided with a downward tip and an upward end face, the thread section is arranged on the end face of the cone portion, and the thread section of the guide cone 91 is in threaded connection with a threaded hole at the lower end of the third-stage shaft 73. The lower end surface of the tertiary shaft 73 abuts against the end surface of the tapered portion of the guide cone 91.

The first-stage sliding sleeve 41 is slidably sleeved on the first-stage shaft 33, and the inner diameter of the first-stage sliding sleeve 41 is smaller than the outer diameter of the striking portion of the first-stage striking hammer 31, so that when the first-stage shaft 33 descends relative to the first-stage sliding sleeve 41, the striking portion of the first-stage striking hammer 31 can strike the upper end surface of the first-stage sliding sleeve 41 downwards to promote the first-stage sliding sleeve to move downwards. The second-stage hammer 51 has an outer diameter of the striking part larger than an inner diameter of the first-stage sliding sleeve 41, and the second-stage hammer 51 constitutes a stopper structure screwed to the lower side of the first-stage center shaft to limit the downward movement of the first-stage sliding sleeve.

The first-stage scraping blades 42 are fixed on the outer peripheral surface of the first-stage sliding sleeve 41, three groups of first-stage scraping blades 42 are arranged on the first-stage sliding sleeve 41 along the up-down direction, four first-stage scraping blades 42 are uniformly distributed along the circumferential direction, projections of the first-stage scraping blades 42 along the up-down direction are positioned on the same circumference, the central angle between every two adjacent projections is 30 degrees, and projections are uniformly distributed on the circumference. The first stage sliding sleeve 41 forms a fixed body of the first stage scraping portion, four first stage scrapers 42 of each group form a scraping circle, and the scraping diameters of the first stage scrapers 42 of each group are the same so as to meet the scraping effect of the oil pipe. The area of the scraping circle is the scraping range of the scraping portion.

The first-stage scraper 42 is a double-edged knife and comprises two cutting edges and a fixed main body, wherein the two cutting edges of the first-stage scraper 42 are distributed on two sides of the fixed main body along the circumferential direction of the first-stage sliding sleeve 41, the fixed main body is connected with the outer circumferential surface of the first-stage sliding sleeve 41, and the cutting edges of the first-stage scraper 42 are spaced from the outer circumferential surface of the first-stage sliding sleeve 41. The first-stage scraper 42 has two side surfaces in the circumference direction of the first-stage sliding sleeve 41 and an upper end surface, a lower end surface and an outer side surface, the outer side surface of the first-stage scraper 42 is an arc surface so that scraping circles are formed by the same group of first-stage scrapers 42, the upper end surface of the first-stage scraper 42 is a plane, the lower end surface is an arc surface, the lower end surface inclines towards one circumferential side of the first-stage sliding sleeve 41, the connection position of the lower end surface and the two side surfaces is one high and one low, so that the first-stage scraper 42 is provided with a downward wedge-shaped end, and the connection position of the lower end surface and the one side surface with the lower connection position forms a downward tip of the wedge-shaped end.

The second stage sliding sleeve 61 is slidably fitted over the second stage shaft 53, and an inner diameter of the second stage sliding sleeve 61 is smaller than an outer diameter of a striking portion of the second stage hammer 51 so that the striking portion of the second stage hammer 51 can strike down to an upper end surface of the second stage sliding sleeve 61 to urge the second sliding sleeve to move down when the second stage shaft 53 descends with respect to the second stage sliding sleeve 61. The third-stage hammer 71 constitutes a stopper structure screwed to the lower side of the second-stage center shaft, and the outer diameter of the striking section of the third-stage hammer 71 is larger than the inner diameter of the second-stage sliding sleeve 61 to limit the downward movement of the second sliding sleeve.

The third-stage sliding sleeve 81 is slidably fitted over the third-stage shaft 73, and an inner diameter of the third-stage sliding sleeve 81 is smaller than an outer diameter of a striking portion of the third-stage hammer 71 so that the striking portion of the third-stage hammer 71 can strike down to an upper end surface of the third-stage sliding sleeve 81 to cause the third sliding sleeve to move down when the third-stage shaft 73 descends with respect to the third-stage sliding sleeve 81. The guide cone 91 forms a stop structure screwed on the lower side of the third-stage central shaft, and the conical part of the guide cone 91 limits the downward movement of the third-stage sliding sleeve.

The second-stage scraping knife 62 is fixed on the second-stage sliding sleeve 61, the third-stage scraping knife 82 is fixed on the third-stage sliding sleeve 81, the second-stage sliding sleeve 61 forms a fixed body of the second-stage scraping part, the third-stage sliding sleeve 81 forms a fixed body of the third-stage scraping part, the second-stage scraping knife 62 and the third-stage scraping knife 82 are all provided with a plurality of second-stage scraping knives 62, the third-stage scraping knife 82 are identical to the first-stage scraping knife 42 in shape, structure and distribution, and the difference is that the sizes are different.

The outer diameter of the first-stage sliding sleeve 41 is larger than the outer diameter of the second-stage sliding sleeve 61, and the outer diameter of the second-stage sliding sleeve 61 is larger than the outer diameter of the third-stage sliding sleeve 81, so that the radial dimension of the fixed body of each-stage scraping portion is made smaller stepwise in the axial direction. The first stage doctor blade 42 has a size that is larger than the second stage doctor blade 62, and the second stage doctor blade 62 has a size that is larger than the third stage doctor blade 82. The maximum radial dimension of each scraping part comprises the dimension of the fixed body in the radial direction of the oil pipe cleaner and the dimension of the scraping knife in the radial direction of the oil pipe cleaner, namely, the maximum radial dimension of the scraping part is formed by the outer diameter dimension of the sliding sleeve and the maximum thickness of the two scraping knives which are opposite in radial direction, the maximum radial dimension of each scraping part is gradually reduced along the axial direction, the maximum radial dimension of each scraping part determines the size of a scraping circle, the scraping range of each scraping part is further determined, and in the adjacent two-stage scraping parts, the scraping range of the scraping part at the upper stage is larger than the scraping range of the scraping part at the lower stage, so that the scraping knives of each scraping part can respectively scrape different layers of scale.

The outer diameter of the first stage shaft 33 is larger than the outer diameter of the second stage shaft 53, and the outer diameter of the second stage shaft 53 is larger than the outer diameter of the third stage shaft 73. The diameters of the threaded holes of the central shafts of all stages are the same, correspondingly, the sizes of the threaded sections are the same, and the threaded parameters of the threaded sections and the threaded holes are consistent, so that any two stages of central shafts can be in threaded connection, any one stage of central shaft can be connected with the slide bar 22 and the guide cone 91, and the combination of any two stages of scraping parts can be realized. Can be combined into a two-stage scale remover and a three-stage scale remover according to different scaling degrees. Because the central shaft and the scraping part are installed in a sliding way, the proper scraping part can be installed on the central shaft according to the requirement so as to adapt to the conditions of sulfur deposition scaling with different degrees.

The length of the central shaft of each scraping portion is gradually reduced from top to bottom, the axial length of the first-stage shaft 33 is greater than that of the second-stage shaft 53, and the axial length of the second-stage shaft 53 is greater than that of the third-stage shaft 73, so that the sliding stroke of the first-stage sliding sleeve relative to the first-stage shaft is greater than that of the second-stage sliding sleeve relative to the second-stage shaft, and the sliding stroke of the second-stage sliding sleeve relative to the second-stage shaft is greater than that of the third-stage sliding sleeve relative to the third-stage shaft.

The first-stage shaft 33 is provided with a first-stage shaft leakage groove 34 extending vertically, the striking part of the first-stage vibrating hammer 31 is provided with a first-stage vibrating hammer leakage groove 32, the second-stage shaft 53 is provided with a second-stage shaft leakage groove 54 extending vertically, the striking part of the second-stage vibrating hammer 51 is provided with a second-stage vibrating hammer leakage groove 52, the third-stage shaft 73 is provided with a third-stage shaft leakage groove 74 extending vertically, and the striking part of the third-stage vibrating hammer 71 is provided with a third-stage vibrating hammer leakage groove 72. The first stage shaft drain groove 34 is communicated with the first stage vibro-hammer drain groove 32 to form a drain groove on the first stage central shaft, the second stage shaft drain groove 54 is communicated with the second stage vibro-hammer drain groove 52 to form a drain groove on the second stage central shaft, the third stage shaft drain groove 74 is communicated with the third stage vibro-hammer drain groove 72 to form a drain groove on the third stage central shaft, and the drain grooves on the stages central shafts are correspondingly communicated up and down. The shaft drainage grooves and the hammer drainage grooves are all distributed around along the circumferential direction, and the shaft drainage grooves and the hammer drainage grooves are arc-shaped grooves. The guide cone 91 is provided with a guide cone drainage groove 92, and the guide cone drainage groove 92 is correspondingly communicated with a drainage groove on the central shaft. Through setting up the drainage groove for keep the space between sliding sleeve and the center pin, utilize the space that link up from top to bottom, can supply the dirty of scraping to carry away from the drainage groove, simultaneously, can keep scraping portion upper and lower both sides space intercommunication when scraping portion and oil pipe dirty contact completely and form sealedly, prevent to form pressure differential and cause the top drill, moreover, when oil pipe scale remover can't unclamp in oil pipe, the drainage groove still can be as the passageway of pumping into the dissolving agent.

In specific implementation, a proper combination of a central shaft and a scraping part can be selected according to the thickness and hardness of sulfur wax deposited on the inner wall of an oil pipe of an oil-gas well, three-stage scraping is adopted in the embodiment, a spring 23 provided with a cleaning brush 24 is sleeved on a slide bar 22, a joint 1 is welded, sliding sleeves of all stages provided with scrapers are respectively sleeved on the central shafts of all stages, the central shafts of all stages are in threaded connection, and a guide cone 91 is in threaded connection with the central shaft at the lowest side; the scraping instrument string consisting of the rope cap weighting rod and the oil pipe scaler is delivered by the steel wire on the upper joint 1, the scraping instrument string is put into the scaling oil pipe, downward impact is realized under the action of inertia force caused by the self weight of the rope cap weighting rod and the oil pipe scaler, the central shaft is lifted upwards by the steel wire under the action of the power of the test vehicle, at the moment, the resistance of the sliding sleeve of the scraping part and the scraping knife on the inner wall of the oil pipe cannot rise along with the central shaft, the central shaft moves upwards relative to the sliding sleeve, after the upward lifting force of the test vehicle is interrupted, the central shaft is released and impacts downwards again under the action of inertia force caused by the self weight of the rope cap weighting rod and the oil pipe scaler, the vibrating hammer can vibrate the sliding sleeve downwards, under the vibrating action of the vibrating hammer, the scraping of sulfur or wax in different radial ranges on the inner wall of the oil pipe is scraped by each level of the scraping knife, the sediment in a well bottom, the scraping down sediment in the well bottom is cleaned by the small dirt remained on the inner wall of the oil pipe, the bottom of the well is cleaned, and the purposes of removing sulfur or wax in different radial ranges in the well bottom are achieved, and the purposes of cleaning the sulfur or wax in different radial ranges are achieved, and the effect of cleaning effect is achieved, and the surface is clear after the central shaft is lifted down and the cleaning down.

Therefore, through the arrangement of the scraping parts of each level, the scraping range of which is gradually reduced, the scraping part with the lower scraping range is utilized to scrape one layer, the scraping part with the upper scraping range is utilized to scrape one layer next, layered scraping is realized, the scale layer required to be scraped by each level of scraping part is not too thick, thereby being beneficial to reducing scraping resistance, ensuring smooth scraping and improving scraping efficiency.

The lower scraping part is provided with a lower scraping part, and the lower scraping part is provided with a lower sliding sleeve, so that the lower scraping part is provided with a lower sliding sleeve, and the lower sliding sleeve is provided with a lower sliding sleeve.

Example 2 of the tubing sealer of the present utility model:

this embodiment differs from embodiment 1 in that in embodiment 1, the oil pipe cleaner includes a brush and an upper joint for connecting with a cap weight. In this embodiment, the oil pipe scaler is not provided with a brushing part and an upper joint, the thread section on the first-stage central shaft is used for being connected with the rope cap weighting rod, the oil pipe scaler is suitable for being used in a non-stop well state, and sediment scraped by the scraper rises along with oil and air flow and is brought to the ground.

Example 3 of the tubing sealer of the present utility model:

the difference between this embodiment and embodiment 1 is that in embodiment 1, the scraping portion includes a central shaft, the fixing body is a sliding sleeve, the sliding sleeve is slidably disposed on the central shaft, the scraper is fixed on the outer peripheral surface of the sliding sleeve, and a vibration portion is disposed on one side of the central shaft on the sliding sleeve, and the vibration portion is used for vibrating the sliding sleeve when the central shaft moves relative to the sliding sleeve. In this embodiment, the fixing bodies of the scraping portions of the respective stages are directly fixedly connected to each other without providing a central shaft.

Embodiments of the oil line descaling system of the present utility model:

the oil pipe descaling system comprises a lifting device and an oil pipe descaling device, wherein the lifting device is a test vehicle, a winding drum is arranged on the test vehicle, a steel wire is wound on the winding drum, the tail end of the steel wire is provided with a rope cap weighting rod, the rope cap weighting rod forms a connecting piece for connecting the oil pipe descaling device, the test vehicle lifts or lowers the oil pipe descaling device through the steel wire under the action of power, and the oil pipe descaling device in the embodiment is the same as the oil pipe descaling device recorded in any one of embodiments 1-3 of the oil pipe descaling device.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides an oil pipe scale remover, includes scraping portion, and characterized by is equipped with at least two-stage along upper and lower direction scraping portion, and in the adjacent two-stage scraping portion, the scraping scope of the scraping portion of upper order is greater than the scraping scope of the scraping portion of lower order.

2. The oil pipe cleaner of claim 1, wherein the scraping portion includes a central shaft, a sliding sleeve, and a scraper fixed on the sliding sleeve, the sliding sleeve is slidably disposed on the central shaft, a vibrating portion is disposed on the central shaft above the sliding sleeve, the vibrating portion is used for vibrating the sliding sleeve when the central shaft moves downward relative to the sliding sleeve, a blocking structure is disposed on the central shaft below the sliding sleeve, the central shafts of the scraping portions of each stage are connected end to end, and the length of the sliding stroke of the sliding sleeve of each scraping portion of each stage is gradually reduced from top to bottom.

3. The oil pipe scaler as claimed in claim 2, wherein one of the adjacent two central shafts is provided with external threads, the other is provided with a threaded hole, the threaded hole is internally provided with internal threads which are in adaptive connection with the external threads, and the apertures of the threaded holes of the central shafts are the same for the threaded connection of any two central shafts.

4. A tubing scale remover according to claim 2 or 3, wherein the central shaft is provided with axially extending drain grooves, the drain grooves on each stage of central shaft being in communication.

5. A fuel pipe cleaner as claimed in claim 1, 2 or 3, wherein the scraping portion comprises a fixed body and a scraper fixed to the fixed body, the radial dimension of the fixed body of each scraping portion being progressively smaller in the axial direction.

6. A tubing scale remover according to claim 1, 2 or 3, further comprising a brush comprising a sweeper brush for contacting the interior wall of the tubing.

7. The oil pipe cleaner of claim 6, wherein the brushing portion includes a sliding rod and a spring sleeved on the sliding rod, and more than two brushing brushes are provided, each brushing brush being fixed on the spring.

8. A tubing scale remover according to claim 2 or 3, wherein the scraper has a downwardly directed wedge-shaped end.

9. A tubing scale remover according to claim 1, 2 or 3, wherein a guide cone is provided at the end of the tubing scale remover, the guide cone being a cone with a pointed tip facing downwards.

10. An oil pipe descaling system, characterized by comprising a lifting device and an oil pipe descaling device, wherein the lifting device comprises a connecting piece for connecting the oil pipe descaling device, the lifting device is used for lifting or lowering the oil pipe descaling device, and the oil pipe descaling device is the oil pipe descaling device according to any one of claims 1-9.