CN210068087U - Paraffin removal device - Google Patents

Abstract

The utility model provides a paraffin removal device, which comprises a paraffin removal main body, an annular scraper and an auxiliary paraffin scraping piece; the first end of the paraffin removal main body is used for being connected with a well entering auxiliary device, and the annular scraper is arranged at the second end of the paraffin removal main body; the auxiliary wax scraping piece is arranged along the circumferential direction of the outer wall of the wax removing main body; the vertical distance between the cutting edge of the auxiliary wax scraping piece and the axis of the wax removal main body is larger than that between the annular scraper and the axis of the wax removal main body. The utility model discloses an annular scraper strikes off earlier wax far away from the pit shaft inner wall, then supplementary wax scraping spare strikes off from the nearer wax of pit shaft inner wall, has realized that same paraffin removal device strikes off twice from the adnexed wax of pit shaft inner wall, has effectually improved the utility model discloses a paraffin removal device scrape the wax effect.

Description

Paraffin removal device

Technical Field

The utility model relates to an oil field development technical field especially relates to paraffin removal device.

Background

In the process of crude oil exploitation, along with the continuous reduction of temperature and pressure, sediments dissolved in crude oil can be separated out as crystals, and the crystals are gathered and deposited on the inner wall of a shaft after growing up to form a wax precipitation phenomenon.

In the paraffin removal process, a paraffin removal tool is put into the well by using a steel wire rope, and the wax attached to the well wall is scraped. The existing paraffin removal tool comprises a connecting column and a paraffin scraping sheet, wherein the paraffin scraping sheet is a spiral paraffin scraping sheet and is arranged around the outer wall of the connecting column. In the paraffin removal process, the edge of the spiral paraffin scraper is contacted with the paraffin on the well wall to scrape the paraffin attached to the inner wall of the well.

Because the external diameter of above-mentioned spiral wax scraping piece is unanimous, consequently scraping the wax in-process, spiral wax scraping piece only can scrape the wax that pit shaft thickness is the same, in order to make wax removal device can be smooth move in the pit shaft, the blade of spiral wax scraping piece all can be great apart from the distance of pit shaft inner wall, just so leads to wax removal device's scraping effect poor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a paraffin removal device has solved current paraffin removal instrument and only can strike off the wax from the same distance of pit shaft inner wall and lead to scraping the poor problem of wax effect.

The utility model provides a paraffin removal device, which comprises a paraffin removal main body, an annular scraper and an auxiliary paraffin scraping piece;

the first end of the paraffin removal main body is used for being connected with a well entering auxiliary device, and the annular scraper is arranged at the second end of the paraffin removal main body;

the auxiliary wax scraping piece is arranged along the circumferential direction of the outer wall of the wax removal main body;

the vertical distance between the cutting edge of the auxiliary wax scraping piece and the axis of the wax removal main body is larger than that between the annular scraper and the axis of the wax removal main body.

Optionally, the cutting edge of the auxiliary wax scraping piece is in contact with the inner wall of the well bore.

Optionally, the auxiliary wax scraping piece comprises a plurality of scrapers;

the scrapers are spirally arranged around the axis of the paraffin removal main body.

Optionally, only 1 scraper is arranged on the same circumference of the paraffin removal main body.

Optionally, the auxiliary wax scraping piece further comprises a fixing piece detachably arranged on the wax removing main body, and the fixing piece is used for fixing the scraper on the outer wall of the wax removing main body.

Optionally, the fixing member includes a plurality of fixing rods, and the plurality of fixing rods are spirally arranged around the axis of the paraffin removal main body;

each scraper is arranged at one end, far away from the paraffin removal main body, of the fixed rod respectively.

Optionally, the scraper is pyramid-shaped, and the bottom surface of the pyramid-shaped scraper is far away from the annular scraper.

Optionally, the bottom surface of the pyramid is parallel to the cross section of the paraffin removal body.

Optionally, the paraffin removal device further comprises a clamping part;

the clamping part comprises two annular fixing pieces and a supporting piece which are oppositely arranged along the axial direction of the paraffin removal main body,

one of the annular fixing pieces is arranged at the second end of the paraffin removal main body, the other annular fixing piece is used for clamping the annular scraper, and the two annular fixing pieces are connected through the supporting piece.

Optionally, the first end of the paraffin removal main body is in threaded connection with the well entry assisting device.

The utility model provides a paraffin removal device, which comprises a paraffin removal main body, an annular scraper and an auxiliary paraffin scraping piece; the first end of the paraffin removal main body is used for being connected with a well entering auxiliary device, and the annular scraper is arranged at the second end of the paraffin removal main body; the auxiliary wax scraping piece is arranged along the circumferential direction of the outer wall of the wax removing main body; the vertical distance between the cutting edge of the auxiliary wax scraping piece and the axis of the wax removal main body is larger than that between the annular scraper and the axis of the wax removal main body. The utility model discloses an one end at the paraffin removal main part sets up annular scraper, set up the supplementary wax piece of scraping in the outer wall axial of paraffin removal main part simultaneously, and the perpendicular distance of the axis of the blade of scraping the wax piece with the paraffin removal main part with the supplementary sets up the perpendicular distance that is greater than annular scraper and paraffin removal main part, so that after going into the pit shaft under the paraffin removal device, the annular scraper strikes off wax far away from the pit shaft inner wall earlier, then supplementary wax piece of scraping strikes off from the nearer wax of pit shaft inner wall, so that the supplementary wax piece of scraping of messenger strikes off the secondary clearance of remaining wax that the annular scraper did not strike off, realized the clearance of the wax of different thickness in same paraffin removal device to the pit shaft, effectual improvement the utility model discloses a paraffin removal device scrapes the effect, and the device simple structure, and easy operation, and then improved paraffin removal efficiency.

The structure of the present invention and other objects and advantages thereof will be more clearly understood from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic view of a prior art paraffin removal tool;

FIG. 2 is a schematic view of a first structure of the paraffin removal device provided in this embodiment;

FIG. 3 is a schematic view of a second structure of an auxiliary wax scraping element in the wax removing device provided in this embodiment;

FIG. 4 is a schematic structural diagram of a scraper in the paraffin removal device provided in this embodiment;

FIG. 5 is a schematic view of a second structure of the paraffin removal device provided in this embodiment;

fig. 6 is a schematic structural view of a clamping portion in the paraffin removal device provided in this embodiment.

Description of reference numerals:

1-paraffin removal main body;

2-annular scraper;

3, auxiliary wax scraping pieces;

31-a scraper;

32-a fixing piece;

4-a clamping part;

41-a ring-shaped fixing piece;

42-a support member;

5, connecting a column;

6-wax scraping sheet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be a mechanical connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

At present, when the wax deposition phenomenon occurs on the inner wall of a shaft, the shaft is firstly subjected to shaft dredging operation through a shaft dredging tool, and when the shaft dredging tool can be put into the bottom of the shaft, wax removal operation is carried out.

Fig. 1 is a schematic structural diagram of a paraffin removal tool in the prior art. As shown in figure 1, the paraffin removal tool adopted by the flowing well paraffin removal mainly comprises a connecting column 5 and a paraffin scraper 6, wherein the paraffin scraper 6 is a spiral paraffin scraper and is arranged around the outer wall of the connecting column 5. In the paraffin removal process, the edge of the spiral paraffin scraper is contacted with the paraffin on the well wall to scrape the paraffin attached to the inner wall of the well.

However, the vertical distance between the outer edge of the existing spiral wax scraping sheet and the axis of the connecting column 5 is consistent, so that after the wax removing tool is put into the shaft, the spiral wax scraping sheet can only simply scrape the wax away from the inner wall of the shaft at the same distance, so that the residual wax after scraping is more, and the wax scraping effect is poor.

In order to improve the wax scraping effect, the following embodiments provide a wax removing device.

Fig. 2 is a schematic view of a first structure of the paraffin removal device provided in this embodiment. As shown in fig. 2, the present embodiment provides a paraffin removal device, which includes a paraffin removal main body 1, an annular scraper 2 and an auxiliary paraffin removal member 3; the first end of the paraffin removal main body 1 is used for being connected with a well entering auxiliary device, and the annular scraper 2 is arranged at the second end of the paraffin removal main body 1; the auxiliary wax scraping piece 3 is arranged along the circumferential direction of the outer wall of the paraffin removal main body 1; the vertical distance between the cutting edge of the auxiliary wax scraping piece 3 and the axis of the paraffin removal main body 1 is larger than that between the annular scraper 2 and the axis of the paraffin removal main body 1.

Specifically, in order to improve the paraffin removal efficiency, the utility model arranges the annular scraper 2 at the second end, namely the bottom end, of the paraffin removal main body 1, and simultaneously arranges the auxiliary paraffin removal part 3 in the axial direction of the outer wall of the paraffin removal main body 1, and sets the vertical distance between the cutting edge of the auxiliary paraffin removal part 3 and the axis of the paraffin removal main body 1 to be greater than the vertical distance between the annular scraper 2 and the axis of the paraffin removal main body 1, so that after the paraffin removal device is put into a shaft, the annular scraper 2 firstly scrapes off the paraffin far away from the inner wall of the shaft (namely the paraffin with thicker thickness), and then adopts the auxiliary paraffin removal part 3 to scrape off the paraffin closer to the inner wall of the shaft (namely the paraffin with thinner thickness, which can be originally formed on the inner wall of the shaft, and can also be formed after the cleaning of the annular scraper 2), so that the auxiliary paraffin removal part 3 scrapes off the secondary cleaning of the residual paraffin not scraped off from the annular scraper 2, compared with the prior art, only scraping off the paraffin with the same inner diameter, the paraffin removal device of this embodiment not only realizes scraping of the ascending wax of pit shaft axial, also scrapes the wax of wax piece 3 to different internal diameters through the annular scraper 2 and the supplementary wax removal of scraping of the different distances of axis from paraffin removal main part 1 and has scraped, the effectual wax effect of scraping that has improved.

The structure of the paraffin removal main body 1 may be various, and is not limited here, for example, the paraffin removal main body 1 may be configured as a cylindrical member, or may be configured as a prismatic member, as long as the fixed installation of the annular scraper 2 and the auxiliary paraffin scraper 3 and the normal running of the paraffin removal main body 1 into the wellbore can be ensured. Meanwhile, the paraffin removal main body 1 can be a hollow structure or a solid piece. For example, set up paraffin removal main part 1 into hollow structure, not only can reduce the preparation material of paraffin removal device, play the effect of saving cost, when the cavity of paraffin removal main part 1 link up paraffin removal main part 1's second end moreover, this paraffin removal device is at the in-process that goes down the well, the area of contact of paraffin removal main part 1's second end and the adnexed wax of pit shaft inner wall reduces, and then reduced the resistance of paraffin removal main part 1 downstream, make paraffin removal main part 1 increase along the speed of the axial downstream of pit shaft, thereby improve paraffin removal efficiency of this paraffin removal device. And set up paraffin removal main part 1 to the entity structure, can increase this paraffin removal main part 1's weight for paraffin removal main part 1's gravity increases, has guaranteed the vertical removal of axial along the pit shaft when paraffin removal main part 1 moves down, has avoided going into well in-process paraffin removal main part 1 and has controlled the slope and influence paraffin removal efficiency, has also prevented paraffin removal main part 1 from lifting the in-process and controlling the slope and make the supplementary cutting edge of scraping wax piece 3 damage the condition emergence of the wall of a well.

The first end of the paraffin removal main body 1 is used for being connected with a well entering auxiliary device, so that the paraffin removal device is placed into a well through the well entering auxiliary device, and is driven by the well entering auxiliary device to move downwards along the axial direction of a shaft, and paraffin removal operation is carried out.

In the actual paraffin removal process, the auxiliary device entering the well can comprise an air pressure driving pump, the air pressure driving pump is connected to the first end of the paraffin removal main body 1, during paraffin removal operation, the air pressure driving pump applies pressure towards the bottom of the well to the paraffin removal main body 1 so as to improve the downward moving speed of the paraffin removal main body 1, meanwhile, pressure is applied to the top end of the paraffin removal main body 1 so as to increase the pressure of the annular scraper 2 on the paraffin removal main body 1 and the pressure of the cutting edge of the auxiliary paraffin removal part 3 on the well wall, so that the cutting strength of the annular scraper 2 and the auxiliary paraffin removal part 3 is enhanced, the adhered paraffin on the inner wall of the well shaft can be effectively scraped, and the paraffin removal effect of the paraffin removal device is improved.

In addition, the auxiliary device for entering the well can be a coiled tubing, the coiled tubing is connected to the first end of the paraffin removal main body 1, and when the paraffin removal main body 1 is of a hollow structure, the cavity in the paraffin removal main body 1 penetrates through the upper end and the lower end, so that the first end of the paraffin removal main body 1 is communicated with the coiled tubing, and the second end of the paraffin removal main body 1 is communicated with the inner cavity of the shaft. In the paraffin removal process, cleaning liquid such as water is firstly input into the cavity of the paraffin removal main body 1 through the continuous oil pipe, the cleaning liquid flows to the inner cavity of the shaft through the second end of the paraffin removal main body 1, the inner cavity of the shaft is subjected to hydraulic cleaning through the cleaning liquid, and along with the descending of a paraffin removal device, the annular scraper 2 and the auxiliary paraffin scraping piece 3 perform mechanical cleaning on the inner wall of the shaft, so that a double paraffin removal mode combining hydraulic flushing and mechanical scraping is realized, and the paraffin removal effect is effectively improved.

Wherein, this paraffin removal main part 1's first end and go into between the well auxiliary device accessible connecting portion 11 and be connected, and is concrete, this connecting portion 11 can be for setting up the external screw thread on paraffin removal main part 1, on going into the well auxiliary device correspondingly be provided with this external screw thread assorted internal thread, paraffin removal main part 1's first end is passed through the screw thread and is connected with the well auxiliary device that goes into. Threaded connection not only can guarantee paraffin removal main part 1 and go into the well connection stability between the auxiliary device, is convenient for moreover paraffin removal device's dismantlement and change. In addition, the connecting portion 11 may also be a buckle disposed on the paraffin removal main body 1, and a clamping groove corresponding to the buckle is disposed on the auxiliary device for entering the well, so that the paraffin removal main body 1 and the auxiliary device for entering the well are connected by the mutual matching of the clamping groove and the buckle, thereby facilitating the detachment and installation of the paraffin removal main body 1.

The paraffin removal process of the paraffin removal device of the embodiment specifically comprises the following steps: go into the wax removal device of this embodiment and go into the well through going into well auxiliary device, the annular scraper 2 that is located the second end of paraffin removal main part 1 earlier strikes off the wax far away relatively from the pit shaft inner wall, with the wax of tentatively striking off great block mass, the wax piece 3 is scraped to the wax relatively near from the pit shaft inner wall to supplementary paraffin removal that scrapes that is located on the outer wall of paraffin removal main part 1 afterwards, carry out the secondary and clear up with the remaining wax after scraping annular scraper 2, go into to the pit shaft bottom under paraffin removal main part 1, accomplish paraffin removal operation. After paraffin removal is finished, the paraffin removal device is lifted to a wellhead through the well entering auxiliary device for cleaning for next paraffin removal.

In the paraffin removal process, the annular scraper 2 can effectively scrape off wax of a large lump, and in the process of entering a well, the annular scraper 2 can judge the wax deposition condition of the inner wall of the shaft firstly, and if the lump is too large, the annular scraper 2 cannot continue to cut downwards, and the paraffin removal device can be lifted. Simultaneously, because annular scraper 2 part inlays in the second end of paraffin removal main part 1, the cutting edge is down, and this mode of setting makes the paraffin removal device at the in-process that lifts, has avoided annular scraper 2 to be glued the card by the block mass and leads to the condition that the device can't lift smoothly.

Wherein, this annular scraper 2 can dismantle the setting at the second end of paraffin removal main part 1 to make annular scraper 2 conveniently dismantle. Specifically, because paraffin removal device's long-term paraffin removal can lead to cohering more wax on the annular scraper 2, consequently need carry out periodic cleaning to annular scraper 2, when annular scraper 2 appears damaged, need in time more renew annular scraper 2, can dismantle the setting and make annular scraper 2's clearance and change convenient and fast more.

This embodiment will assist the perpendicular distance of the blade of scraping wax piece 3 and the axis of paraffin removal main part 1 to set up to being greater than the perpendicular distance of annular scraper 2 and paraffin removal main part 1's axis, can realize that this paraffin removal device strikes off from the wax of the different distances of pit shaft inner wall, and same paraffin removal device strikes off twice to the adnexed wax of pit shaft inner wall promptly, has effectually improved the utility model discloses a paraffin removal device scrapes the wax effect, and the device simple structure, and easily operation, and then improved paraffin removal efficiency.

In this embodiment, the cutting edge of the auxiliary wax scraping element 3 can be contacted with the inner wall of the shaft.

Specifically, the cutting edge of the auxiliary wax scraping piece 3 is contacted with the inner wall of the shaft so as to completely remove the wax attached to the inner wall of the shaft. During specific paraffin removal, firstly, the wax of a large lump is scraped preliminarily through the annular scraper 2, and then the wax is scraped downwards from the inner wall of the shaft through the auxiliary paraffin scraping piece 3, so that the wax from the inner wall of the shaft to the axis of the shaft can be scraped, the wax in the shaft is effectively cleaned, the paraffin removal effect of the paraffin removal device is improved, and the paraffin removal device is also ensured to be lifted smoothly.

As shown in fig. 2, the auxiliary wax scraping member 3 may include a plurality of scrapers 31, and the plurality of scrapers 31 are arranged spirally around the axis of the paraffin removal body 1.

Specifically, in the embodiment, the plurality of scrapers 31 are spirally arranged around the axis of the paraffin removal main body 1, so that the pressure intensity when the scrapers 31 contact with the wax deposition lumps can be effectively improved, the cutting capability of the scrapers 31 is enhanced, and the wax adhered to the inner wall of the shaft can be effectively scraped. Wherein, a plurality of scrapers 31 can encircle the outer wall of paraffin removal main part a week completely to guarantee that the wax on the whole circumference of pit shaft inner wall all can cut through scraper 31. Simultaneously, arrange a plurality of scrapers 31 spiral on the outer wall of paraffin removal main part 1, increased supplementary wax range of scraping of wax piece 3 in the pit shaft axial for supplementary wax piece 3 of scraping can scrape more deposit wax at the same time, has effectively improved the paraffin removal efficiency of this paraffin removal device.

When the scrapers 31 are spirally arranged around the axis of the paraffin removal main body 1, only 1 scraper 31 can be arranged on the same circumference of the paraffin removal main body 1, so that the pressure of the auxiliary paraffin removal part 3 on the same circumference is further improved, the cutting strength of the scrapers 31 is improved, and meanwhile, the using amount of the scrapers 31 is also reduced. It is also possible to arrange 2 or more scrapers 31 on the same circumference of the paraffin removal body 1, so that the wax on the same circumference of the shaft cavity is scraped by the plurality of scrapers 31.

In order to make the connection between the plurality of scrapers 31 and the paraffin removal main body 1 more stable, the auxiliary paraffin removal part 3 of the embodiment further comprises a fixing part 32 detachably disposed on the paraffin removal main body 1, and the fixing part 32 is used for fixing the scrapers 31 on the outer wall of the paraffin removal main body 1.

Specifically, a fixing member 32 is provided on the outer wall of the paraffin removal main body 1, so that the plurality of scrapers 31 are fixed on the outer wall of the paraffin removal main body 1 through the fixing member 32. This setting of mounting 32 not only can guarantee the stability of being connected between a plurality of scrapers 31 and the paraffin removal main part 1, prevent that scraper 31 from appearing not hard up condition that drops even and influencing the paraffin removal effect at the paraffin removal in-process, and simultaneously, set up mounting 32 detachable on the outer wall of paraffin removal main part 1, make 31 accessible fixing 32 of scraper dismantle from paraffin removal main part 1, conveniently change and the supplementary scraper 31 of scraping wax piece 3 of clearance, and the setting of mounting 32 also makes the assembly between a plurality of scrapers 31 and the paraffin removal main part 1 more convenient.

The fixing member 32 may have various structures. In one possible embodiment, as shown in fig. 2, the fixing member 32 comprises a plurality of fixing rods, which are arranged spirally around the axis of the paraffin removal body 1; each scraper 31 is respectively arranged at one end of the fixed rod far away from the paraffin removal main body 1.

Specifically, this embodiment sets up mounting 32 to be a plurality of dead levers that the spiral was arranged around the axis of paraffin removal main part 1, fixes every scraper 31 respectively on every dead lever to guarantee that every scraper 31 all obtains effectual fixed, conveniently dismantle and change every scraper 31 simultaneously. Fix every scraper 31 in the one end that the paraffin removal main part 1 was kept away from to the dead lever to prevent that the dead lever from causing the influence to the cutting process of scraper 31, ensure that every blade homoenergetic of scraper 31 can strike off wax.

It can be understood that the auxiliary wax scraping part 3 of the present embodiment adjusts the vertical distance between the cutting edge of the scraper 31 and the axis of the paraffin removal main body 1 by the length of the fixing rod, in other words, the length of the fixing rod is adjusted to enable the scraper 31 to scrape off the wax with different distances from the inner wall of the shaft, and therefore, the length of the fixing rod can be adjusted according to the specific situation of wax deposition in the shaft. In order to scrape off the wax of keeping away from the different distances of pit shaft inner wall simultaneously, can arrange the dead lever of different length at the outer wall spiral of paraffin removal main part 1, not only can realize assisting paraffin removal of scraping the axial different positions of wax removal spare 3 at the pit shaft like this, also can realize the paraffin removal in the different radial of pit shaft, two-way paraffin removal has effectively improved paraffin removal efficiency.

In addition, can be with the length perpendicular to paraffin removal main part 1's of every fixed rod axis, on the basis of the different ascending paraffin removal effect in the assurance pit shaft, reduced the length of fixed rod to the stability of fixed rod has been improved.

In another possible embodiment, the fixing member 32 is a plurality of fixing blocks spirally arranged around the outer wall of the paraffin removal main body 1, and each scraper 31 is fixed on the side of the fixing block away from the paraffin removal main body 1. The fixed block improves the mechanical connection strength between the scraper 31 and the paraffin removal main body 1, so that each scraper 31 is more stable. Wherein, accessible detachable mode is connected between scraper 31 and the fixed block, for example, can set up the draw-in groove in the side that paraffin removal main part 1 was kept away from to the fixed block, sets up in this draw-in groove assorted buckle on scraper 31, and scraper 31 passes through the buckle to be fixed on the fixed block, has not only realized the stability of being connected between scraper 31 and the fixed block, and the dismantlement of scraper 31 of also being convenient for moreover. In addition, the scraper 31 and the fixed block can be integrally formed, so that the connection strength between the scraper 31 and the fixed block is improved, the mechanical structure of the auxiliary wax scraping piece 3 is simplified, and the device is convenient to assemble.

This embodiment sets up mounting 32 into a plurality of dead levers or a plurality of fixed blocks of dismantling the connection on the outer wall of paraffin removal main part 1, and the steadiness of every scraper 31 all can be realized, and this mounting 32's simple structure, the installation and the dismantlement of the scraper 31 of being convenient for, the effectual assembly efficiency who improves between this supplementary paraffin removal spare 3 and the paraffin removal main part 1.

Fig. 3 is a schematic view of a second structure of an auxiliary wax scraping member in the wax removing device provided by the embodiment. As shown in fig. 3, in a specific implementation, the fixing member 32 may also be a fixing strip spirally wound on the paraffin removal main body 1, and the plurality of scrapers 31 are respectively disposed on the fixing strip at intervals. The arrangement of the fixing strips reduces the number of parts of the auxiliary wax scraping part 3, so that the assembling time between the fixing part 31 and the paraffin removal main body 1 is shortened, and the assembling efficiency is improved.

Fig. 4 is a schematic structural diagram of a scraper in the paraffin removal device provided in this embodiment. As shown in fig. 4, the scraper 31 of the present embodiment may be pyramid-shaped, and the bottom surface of the pyramid-shaped scraper is far away from the annular scraper 2.

Specifically, set up supplementary scraper 31 of scraping wax piece 3 to the pyramid shape, and make the bottom surface of this pyramid shape scraper keep away from annular scraper 2 to the thickness that makes this pyramid shape scraper reduce gradually along the axial of paraffin removal main part 1 from the first end of paraffin removal main part 1 to the thickness of paraffin removal main part 1's second end, is favorable to amputating stubborn wax deposit like this. Meanwhile, the knife edge angle of one end of the pyramid-shaped scraper, which is close to the annular scraper 2, is small, so that the pyramid-shaped scraper can scrape wax more thoroughly in the downward moving process. The resistance between the pyramid-shaped scraper and the residual wax deposition in the lifting process is reduced, and the condition that the scraper 31 cannot be lifted due to the adhesion of the residual wax deposition in the lifting process of the paraffin removal device is prevented.

The bottom surface of the pyramid can be parallel to the cross section of the paraffin removal main body 1, so that the bottom surface of the pyramid is of a plane structure, and the bottom surface of the scraper 31 of the paraffin removal device can be prevented from damaging the inner wall of a shaft in the lifting process.

FIG. 5 is a schematic view of a second structure of the paraffin removal device provided in this embodiment; fig. 6 is a schematic structural view of a clamping portion in the paraffin removal device provided in this embodiment. As shown in fig. 5 and 6, the paraffin removal device of the present embodiment may further include a clamping portion 4; the clamping part 4 comprises two annular fixing pieces 41 and a supporting piece 42, wherein the two annular fixing pieces 41 are oppositely arranged along the axial direction of the paraffin removal main body 1, one annular fixing piece 41 is arranged at the second end of the paraffin removal main body 1, the other annular fixing piece 41 is used for clamping the annular scraper 2, and the two annular fixing pieces 41 are connected through the supporting piece 42.

Specifically, in order to reduce the resistance of paraffin removal device in the well entering process, this embodiment sets up clamping part 4 at the second end of paraffin removal main part 1, and set up this clamping part 4 into two upper and lower annular fixing pieces 41 fixed through support piece 42, with annular scraper 2 centre gripping on the annular fixing piece 41 of the second end of paraffin removal main part 1 of keeping away from, so that clamping part 4 of fixed annular scraper 2 is hollow structure, the area of contact between paraffin removal device in the downward removal in-process clamping part 4 and the wax has been reduced like this, thereby paraffin removal device's removal resistance has been reduced, the effectual paraffin removal efficiency that has improved. Meanwhile, the annular scrapers 2 are of hollow structures, and the phenomenon that the wax scraping effect is influenced due to the fact that a large amount of wax is bonded in the wax scraping process of the annular scrapers 2 is avoided.

This embodiment sets up clamping part 4 into hollow structure, then can set up paraffin removal main part 1 above clamping part 4 into solid construction, not only can reduce the resistance of this paraffin removal device downstream, has guaranteed moreover that this paraffin removal device does not take place the skew along the vertical downstream of the axis of pit shaft under the effect of gravity.

One of the ring-shaped fixing members 41 is detachably connected to the second end of the paraffin removal main body 1, so that the clamping portion 4 can be conveniently detached. The annular scraper 2 can be embedded in a clamping groove formed at the bottom of the other annular fixing piece 41. The connection between one of the annular fixing members 41 and the second end of the paraffin removal main body 1 and between the annular scraper 2 and the other annular fixing member 41 may be various, and is not limited herein as long as stable connection between the respective members can be ensured.

The utility model provides a paraffin removal device, which comprises a paraffin removal main body, an annular scraper and an auxiliary paraffin scraping piece; the first end of the paraffin removal main body is used for being connected with a well entering auxiliary device, and the annular scraper is arranged at the second end of the paraffin removal main body; the auxiliary wax scraping piece is arranged along the circumferential direction of the outer wall of the wax removing main body; the vertical distance between the cutting edge of the auxiliary wax scraping piece and the axis of the wax removal main body is larger than that between the annular scraper and the axis of the wax removal main body. The utility model discloses an one end at the paraffin removal main part sets up annular scraper, set up the supplementary wax piece of scraping in the outer wall axial of paraffin removal main part simultaneously, and the perpendicular distance of the axis of the blade of scraping the wax piece with the paraffin removal main part with the supplementary sets up the perpendicular distance that is greater than annular scraper and paraffin removal main part, so that after going into the pit shaft under the paraffin removal device, the annular scraper strikes off the wax far away from the pit shaft inner wall earlier, then supplementary wax piece of scraping strikes off from the nearer wax of pit shaft inner wall, make the supplementary wax piece of scraping to the secondary clearance of remaining wax that the annular scraper did not strike off, realized that same paraffin removal device strikes off from the twice of pit shaft inner wall adnexed wax, effectually improved the utility model discloses a paraffin removal device scrapes the wax effect, and the device simple structure, and easy to operate, and then improved paraffin removal efficiency.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A paraffin removal device is characterized by comprising a paraffin removal main body, an annular scraper and an auxiliary paraffin removal part;

the first end of the paraffin removal main body is used for being connected with a well entering auxiliary device, and the annular scraper is arranged at the second end of the paraffin removal main body;

the auxiliary wax scraping piece is arranged along the circumferential direction of the outer wall of the wax removal main body;

the vertical distance between the cutting edge of the auxiliary wax scraping piece and the axis of the wax removal main body is larger than that between the annular scraper and the axis of the wax removal main body.

2. The paraffin removal device of claim 1, wherein the cutting edge of the auxiliary wax scraping element is in contact with the inner wall of the shaft.

3. The paraffin removal device of claim 2, wherein the auxiliary paraffin scraping element comprises a plurality of scrapers;

the scrapers are spirally arranged around the axis of the paraffin removal main body.

4. A paraffin removal device as claimed in claim 3, wherein only 1 scraper is provided on the same circumference of the paraffin removal body.

5. The paraffin removal device of claim 3, wherein the auxiliary paraffin scraping element further comprises a fixing element detachably arranged on the paraffin removal main body, and the fixing element is used for fixing the scraper on the outer wall of the paraffin removal main body.

6. The paraffin removal device of claim 5, wherein the fixing member comprises a plurality of fixing rods arranged in a spiral around the axis of the paraffin removal body;

each scraper is arranged at one end, far away from the paraffin removal main body, of the fixed rod respectively.

7. A paraffin removal device according to claim 3, wherein the scraper is pyramid-shaped with its base facing away from the annular scraper.

8. The paraffin removal device of claim 7, wherein the base of the pyramid shape is parallel to the cross-section of the paraffin removal body.

9. The paraffin removal device of claim 1, further comprising a grip;

the clamping part comprises two annular fixing pieces and a supporting piece which are oppositely arranged along the axial direction of the paraffin removal main body,

one of the annular fixing pieces is arranged at the second end of the paraffin removal main body, the other annular fixing piece is used for clamping the annular scraper, and the two annular fixing pieces are connected through the supporting piece.

10. The paraffin removal device of claim 1, wherein the first end of the paraffin removal body is threadably connected to the well entry aid.

Images