CN211648089U

CN211648089U - Oil pipe scraper

Info

Publication number: CN211648089U
Application number: CN201922488647.4U
Authority: CN
Inventors: 陈宁; 谢敏; 许建国; 李兴科; 邓茂攸; 王守峰
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-09
Anticipated expiration: 2029-12-31

Abstract

The application discloses oil pipe scraper belongs to the petroleum engineering field. The device comprises: the device comprises a shell, a first flange, a gland and a first rubber cylinder; the first rubber cylinder is positioned in the shell, the first end of the shell is connected with the first flange, and the second end of the shell is connected with the gland; a first through hole is formed in the first flange, and a second through hole is formed in the gland; the first rubber cylinder comprises a first part and a second part; the second portion is located between the first portion and the first flange; the inner diameter of one end of the second part, which is connected with the first part, is the same as that of the first part, and the inner diameter of the second part is gradually increased from one end, which is connected with the first part, to the other end; the first through hole and the second through hole are communicated with the inner cavity of the first rubber cylinder. This application can directly scrape the greasy dirt of cutting the oil pipe outer wall to make the greasy dirt directly fall back to the oil well in, so, when driving the greasy dirt of oil pipe outer wall, can avoid again that the greasy dirt is taken out the well head and pollutes the earth's surface.

Description

Oil pipe scraper

Technical Field

The application relates to the field of petroleum engineering, in particular to an oil pipe scraper.

Background

After the oil pipe is used for a period of time, oil dirt exists on the outer wall of the oil pipe, so that the outer diameter of the oil pipe becomes thick, and the oil pipe cannot be normally used. For this reason, the outer wall of the oil pipe needs to be frequently treated to remove oil dirt on the outer wall of the oil pipe.

At present, a high-temperature cleaning vehicle is mostly adopted to clean oil dirt on the outer wall of an oil pipe. Specifically, the oil pipe is lifted out of the oil well, the lifted oil pipe is horizontally placed on the ground, then a high-temperature cleaning vehicle is adopted to spray high-pressure water flow to the outer wall of the oil pipe, and oil dirt on the outer wall of the oil pipe is cleaned through the high-pressure water flow.

However, when the above method is used for cleaning, fluid such as sewage, dirty oil and the like is easily generated, so that impermeable cloth or steel plates must be laid on the ground below the oil pipe. And once the fluid such as sewage, dirty oil, etc. is lost, the water, soil, vegetation, etc. on the surface of the earth can be polluted.

SUMMERY OF THE UTILITY MODEL

The application provides an oil pipe scraper, can solve contaminated problem such as the surface of earth's surface water, soil and vegetation among the correlation technique. The technical scheme is as follows:

in a first aspect, an embodiment of the present application provides a tubing scraper, which includes: the device comprises a shell, a first flange, a gland and a first rubber cylinder;

the first rubber cylinder is positioned in the shell, the first end of the shell is connected with the first flange, and the second end of the shell is connected with the gland; a first through hole is formed in the first flange, and a second through hole is formed in the press cover;

the first rubber cylinder comprises a first part and a second part; the second portion is located between the first portion and the first flange; the inner diameter of one end of the second part, which is connected with the first part, is the same as that of the first part, and the inner diameter of the second part is gradually increased from one end, which is connected with the first part, to the other end; the first through hole and the second through hole are communicated with the inner cavity of the first rubber cylinder.

Optionally, the tubing scraper further comprises: the partition plate and the second rubber cylinder;

the partition plate and the second rubber barrel are both positioned in the shell, and the first part is in contact with the first plate surface of the partition plate; the second plate surface of the partition plate is in contact with the first end of the second rubber cylinder, and the second end of the second rubber cylinder is in contact with the gland;

the second rubber cylinder comprises a third part and a fourth part, and the third part is positioned between the gland and the fourth part; the inner diameter of the third portion is the same as the inner diameter of the first portion, and the length of the third portion is less than the length of the first portion; the inner diameter of one end, connected with the third part, of the fourth part is the same as that of the third part, and the inner diameter of the fourth part is gradually increased from one end, connected with the third part, to the other end;

the partition plate is provided with a third through hole in the longitudinal direction, the aperture of the third through hole is larger than the inner diameter of the third part, and the inner cavity of the first rubber cylinder and the inner cavity of the second rubber cylinder are both communicated with the third through hole; a fourth through hole is formed in the transverse direction of the partition plate and communicated with the third through hole;

the inner diameter of the shell is larger than the diameter of the partition plate and larger than the outer diameter of the first rubber cylinder; and a fifth through hole is formed in the position, between the outer wall of the first rubber cylinder and the inner wall of the shell, of the first flange.

Optionally, the tubing scraper further comprises a second flange;

the second flange is connected to the second end of the housing.

Optionally, a gap is provided on the wall of the first portion.

Optionally, the tubing scraper further comprises a hoop spring;

the hoop spring is sleeved on the cylinder wall of the first part.

Optionally, an annular groove is formed in the wall of the first portion, and the hoop spring is located in the annular groove.

Optionally, the slits include transverse slits and longitudinal slits.

Optionally, the gland is threadedly connected to the second end of the housing.

Optionally, the tubing scraper further comprises a pin;

the gland is connected with the second end of the shell through the pin.

Optionally, the first via includes a fifth portion and a sixth portion;

the fifth part is positioned between the first rubber cylinder and the sixth part; the bore diameter of the fifth portion is the same as the maximum inner diameter of the second portion; the aperture of the end of the sixth part, which is connected with the fifth part, is the same as that of the fifth part, and the aperture of the sixth part is gradually increased from the end, which is connected with the fifth part, to the other end.

The technical scheme provided by the application can at least bring the following beneficial effects:

because the inner wall of the second part in the first rubber cylinder can gradually scrape off part of oil dirt attached to the outer wall of the oil pipe, and the diameter of the oil pipe is closer to the inner diameter of the first part in the first rubber cylinder, after the oil pipe enters the first part in the first rubber cylinder, the inner wall of the first part tightly embraces the oil pipe, so that the inner wall of the first part can scrape off the oil dirt attached to the outer wall of the oil pipe. The oil dirt that first packing element scraped can directly fall back to the oil well in through first through-hole, so, can avoid oil dirt to be taken out the well head and pollute the earth's surface. And because this oil pipe scraper adopts first flange and well head to be connected, consequently this oil pipe scraper is comparatively firm in the position of use.

Drawings

FIG. 1 is a schematic structural diagram of a first oil pipe scraper provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a second oil pipe scraper provided in the embodiments of the present application;

FIG. 3 is a schematic structural diagram of a third oil pipe scraper provided in the embodiments of the present application;

FIG. 4 is a schematic structural diagram of a fourth oil pipe scraper provided in the embodiments of the present application;

FIG. 5 is a schematic structural diagram of a fifth oil pipe scraper provided in the embodiments of the present application;

FIG. 6 is a schematic structural diagram of a sixth oil pipe scraper provided in the embodiments of the present application;

FIG. 7 is a schematic structural diagram of a seventh oil pipe scraper provided in the embodiments of the present application;

FIG. 8 is a schematic structural diagram of an eighth oil pipe scraper provided in the embodiments of the present application;

fig. 9 is a schematic structural diagram of a ninth oil pipe scraper provided in an embodiment of the present application.

Reference numerals:

1: a housing; 11: a first end of the housing; 12: a second end of the housing; 2: a first flange; 21: a first through hole; 211: a fifth portion of the first via; 212: a sixth portion of the first via; 22: a fifth through hole; 3: a gland; 31: a second through hole; 4: a first glue cylinder; 41: a first portion of a first glue cartridge; 42: a second portion of the first glue cartridge; 5: a partition plate; 51: a first panel of the separator; 52: a second panel surface of the separator; 53: a third through hole; 54: a fourth via hole; 6: a second glue cylinder; 61: a first end of a second glue cartridge; 62: a second end of the second glue cartridge; 63: a third portion of the second glue cartridge; 64: a fourth part of the second rubber cylinder; 7: a second flange; 8: a gap; 9: a hoop spring.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of an oil pipe scraper provided in an embodiment of the present application, and in particular, is a cross-sectional view of the oil pipe scraper. Referring to fig. 1, the oil pipe scraper includes: the device comprises a shell 1, a first flange 2, a gland 3 and a first rubber cylinder 4; the first rubber cylinder 4 is positioned in the shell 1, the first end 11 of the shell 1 is connected with the first flange 2, and the second end 12 of the shell 1 is connected with the gland 3; the first flange 2 is provided with a first through hole 21, and the gland 3 is provided with a second through hole 31; the first glue cylinder 4 comprises a first portion 41 and a second portion 42; the second portion 42 is located between the first portion 41 and the first flange 2; the inner diameter of the end of the second part 42, which is connected with the first part 41, is the same as that of the first part 41, and the inner diameter of the second part 42 is gradually increased from the end, which is connected with the first part 41, to the other end; the first through hole 21 and the second through hole 31 are both communicated with the inner cavity of the first rubber cylinder 4.

It should be noted that, the material and size of the housing 1 may be preset as long as the first rubber cylinder 4 is located in the housing 1, and this is not specifically limited in the embodiment of the present application.

In addition, the first flange 2 is used for connection to the wellhead. The material and size of the first flange 2 may be preset, for example, the material of the first flange 2 may be stainless steel, alloy, etc.

The connection mode between the first end 11 of the housing 1 and the first flange 2 may be preset according to a use requirement, for example, the first end 11 of the housing 1 and the first flange 2 may be welded, and the like, which is not specifically limited in this embodiment of the application.

The gland 3 is a member for confining the first rubber tube 4 within the housing 1. The material and size of the gland 3 may be set in advance, and for example, the material of the gland 3 may be stainless steel, alloy, or the like.

The connection mode between the second end 12 of the housing 1 and the gland 3 may be preset according to a use requirement, for example, the second end 12 of the housing 1 and the gland 3 may be welded, detachably connected, and the like, which is not specifically limited in the embodiment of the present application.

It should be noted that when the second end 12 of the housing 1 is detachably connected to the gland 3, the gland 3 can be removed by a technician to clean or replace the components (such as the first rubber cylinder 4) in the housing 1, so as to prolong the service life of the oil tube scraper.

Then, the first rubber sleeve 4 is a member for scraping off oil dirt on the outer wall of the oil pipe. The material and size of the first rubber cylinder 4 can be set in advance, for example, the material of the first rubber cylinder 4 can be polypropylene, rubber, etc.

It should be noted that, since the inner diameter of the end of the second portion 42 connected to the first portion 41 is the same as the inner diameter of the first portion 41, and the inner diameter of the second portion 42 gradually increases from the end connected to the first portion 41 to the other end, that is, the inner cavity of the second portion 42 is approximately in a truncated cone shape, for example, a multi-stage truncated cone stacking shape, after the oil pipe is lifted up through the first flange 2, the oil pipe can easily enter the second portion 42, and thus can easily enter the first portion 41.

Finally, the sizes of the first through hole 21 and the second through hole 31 may be preset according to the use requirement, as long as it is ensured that the aperture of the second through hole 31 is greater than or equal to the diameter of the inner cavity of the first portion 41, and the aperture of the first through hole 21 is greater than or equal to the maximum diameter of the inner cavity of the second portion 42, which is not specifically limited in the embodiment of the present application.

It should be noted that the axis of the first through hole 21 is consistent with the axis of the first rubber tube 4, and the axis of the first rubber tube 4 is consistent with the axis of the second through hole 31, so that the oil pipe can be lifted smoothly.

In practical application, when the oil pipe scraper is used, a clean-outer-wall pipeline can be firstly passed through the first through hole 21, the inner cavity of the first rubber cylinder 4 and the second through hole 31 in sequence, and then the pipeline is connected with an oil pipe in an oil well, wherein the diameter of the oil pipe is relatively close to the inner diameter of the first part 41 in the first rubber cylinder 4. The first flange 2 is then connected to a flange on the wellhead to secure the tubing scraper to the wellhead, and the tubing attached to the tubing is then lifted up so that the tubing enters the interior of the first packing element 4 through the first through hole 21. The inner wall of the second portion 42 of the first rubber cylinder 4 can gradually scrape off part of the oil dirt attached to the outer wall of the oil pipe. When the oil pipe enters the first portion 41 of the first rubber cylinder 4, the inner wall of the first portion 41 will tightly hold the oil pipe, so that the inner wall of the first portion 41 will scrape off the oil dirt attached to the outer wall of the oil pipe. The oil dirt scraped by the first rubber barrel 4 can directly fall back into the oil well through the first through hole 21, so that the oil dirt can be prevented from being brought out of the wellhead to pollute the earth surface. And because this oil pipe scraper adopts first flange 2 and well head to be connected, therefore the position of this oil pipe scraper in the use is comparatively firm.

It is worth noting that the tubing scraper can still be used even if the wellhead is provided with well control equipment, because the tubing scraper is small in size, simple in structure and easy and convenient to install. In this case, the tubing scraper may be connected not to the wellhead but to well control equipment installed at the wellhead.

Wherein the detachable connection between the gland 3 and the second end 12 of the housing 1 may be in various ways. Two possible detachable connections are described below.

A first possible connection: the gland 3 is threadedly coupled to the second end 12 of the housing 1.

It should be noted that at this time, an internal thread is provided on the second end 12 of the housing 1, an external thread matched with the internal thread is provided on the gland 3, and then the external thread on the gland 3 is screwed into the internal thread on the second end 12 of the housing 1, so that the threaded connection between the second end 12 of the housing 1 and the gland 3 can be realized. In this way, the connection between the gland 3 and the first end 12 of the housing 1 is relatively tight, so that the position of the gland 3 is fixed.

A second possible connection method: the oil pipe scraper also comprises a pin; the gland 3 is pinned to the second end 12 of the housing 1.

The pin is a member for connecting the gland 3 to the second end 12 of the housing 1. The size of the pin can be preset according to the use requirement, as long as it can be ensured that the gland 3 and the second end 12 of the housing 1 can be connected by the pin.

It is noted that the gland 3 may now be placed over the end face of the second end 12 of the housing 1. The edge of the gland 3 may be provided with a through hole in the longitudinal direction and a groove in the end face of the second end 12 of the housing 1. One end of the pin sequentially passes through the through hole on the gland 3 and the groove on the second end 12 of the shell 1. In this way, the connection between the gland 3 and the second end 12 of the housing 1 is relatively tight, so that the position of the gland 3 is fixed.

Further, in order to facilitate the oil pipe in the oil well to pass through the first through hole 21, referring to fig. 2, the first through hole 21 includes a fifth portion 211 and a sixth portion 212; the fifth part 211 is located between the first glue cylinder 4 and the sixth part 212; the bore diameter of the fifth portion 211 is the same as the maximum inner diameter of the second portion 42; the aperture of the end of the sixth portion 212 that meets the fifth portion 211 is the same as the aperture of the fifth portion 211, and the aperture of the sixth portion 212 gradually increases from the end that meets the fifth portion 211 to the other end.

It should be noted that, because the aperture of the end of the sixth portion 212 connected to the fifth portion 211 is the same as the aperture of the fifth portion 211, and the aperture of the sixth portion 212 gradually increases from the end connected to the fifth portion 211 to the other end, that is, the sixth portion 212 is approximately in the shape of a circular truncated cone, when the position of the first flange 2 on the oil pipe is mentioned, the oil pipe can easily enter the sixth portion 212, and thus can easily enter the fifth portion 211. And because the bore diameter of the fifth section 211 is the same as the maximum inner diameter of the second section 42, the oil tube can more easily enter the second section 42 after being lifted up through the fifth section 211.

Optionally, referring to fig. 3, the oil pipe scraper further comprises: a partition plate 5 and a second rubber cylinder 6; the partition plate 5 and the second rubber cylinder 6 are both positioned in the shell 1, and the first part 41 is in contact with the first plate surface 51 of the partition plate 5; the second plate surface 52 of the partition plate 5 is in contact with the first end 61 of the second rubber cylinder 6, and the second end 62 of the second rubber cylinder 6 is in contact with the gland 3; the second glue cylinder 6 comprises a third part 63 and a fourth part 64, the third part 63 is positioned between the gland 3 and the fourth part 64; the inner diameter of the third portion 63 is the same as the inner diameter of the first portion 41, and the length of the third portion 63 is less than the length of the first portion 41; the inner diameter of the end of the fourth portion 64, which is connected with the third portion 63, is the same as the inner diameter of the third portion 63, and the inner diameter of the fourth portion 64 gradually increases from the end connected with the third portion 63 to the other end; the partition plate 5 is provided with a third through hole 53 in the longitudinal direction, the aperture of the third through hole 53 is larger than the inner diameter of the third part 63, and the inner cavity of the first rubber cylinder 4 and the inner cavity of the second rubber cylinder 6 are both communicated with the third through hole 53; the partition plate 5 is provided with a fourth through hole 54 in the transverse direction, and the fourth through hole 54 is communicated with the third through hole 53; the inner diameter of the shell 1 is larger than the diameter of the partition plate 5 and larger than the outer diameter of the first rubber cylinder 4; a fifth through hole 22 is formed in the position, between the outer wall of the first rubber cylinder 4 and the inner wall of the housing 1, of the first flange 2.

The partition plate 5 is a member for partitioning the first rubber cylinder 4 and the second rubber cylinder 6 and discharging oil dirt scraped off by the second rubber cylinder 6. The material and size of the partition plate 5 may be set in advance, and for example, the material of the partition plate 5 may be stainless steel, alloy, or the like.

In addition, the second rubber sleeve 6 is a member for scraping off oil dirt on the outer wall of the oil pipe. The material and size of the second rubber cylinder 6 can be set in advance, for example, the material of the second rubber cylinder 6 can be polypropylene, rubber, etc.

It should be noted that, since the inner diameter of the end of the fourth portion 64 connected to the third portion 63 is the same as the inner diameter of the third portion 63, and the inner diameter of the fourth portion 64 gradually increases from the end connected to the third portion 63 to the other end, that is, the inner cavity of the fourth portion 64 is approximately in a truncated cone shape, after the oil pipe is lifted up and passes through the partition 5, the oil pipe can easily enter the fourth portion 64, and thus can easily enter the third portion 63.

Furthermore, the sizes of the third through hole 53 and the fourth through hole 54 may be preset according to the use requirement, as long as it is ensured that the aperture of the third through hole 53 is larger than the inner diameter of the first portion 41, the fourth through hole 54 is communicated with the third through hole 53, and this embodiment of the application is not particularly limited thereto.

It should be noted that the axis of the third through hole 53 is consistent with the axis of the first rubber cylinder 4, and the axis of the third through hole 53 is consistent with the axis of the second rubber cylinder 6, so that the oil pipe can be lifted smoothly.

Finally, the size and number of the fourth through holes 54 can be preset according to the use requirement. For example, the number of the fourth through holes 54 may be 2, and 2 fourth through holes 54 may be arranged at 90 degrees. Thus, the oil dirt in the third through hole 53 can be made to flow into the space between the outer wall of the first rubber tube 4 and the inner wall of the housing 1 relatively quickly.

It should be noted that the fifth through hole 22 of the first flange 2 may be correspondingly disposed below the fourth through hole 54 of the partition plate 5, so that the oil dirt discharged from the fourth through hole 54 may easily flow out of the fifth through hole 22.

In practical application, when the oil pipe scraper is used, after oil pipe in an oil well is lifted through the first rubber tube 4, the oil pipe enters the third through hole 53 in the partition plate 5, and then the oil pipe enters the inner cavity of the second rubber tube 6 through the third through hole 53. The inner wall of the fourth part 64 in the second rubber cylinder 6 can gradually scrape off part of oil dirt remained and attached on the outer wall of the oil pipe. After the oil pipe enters the third portion 63 of the second rubber sleeve 6, the inner wall of the third portion 63 will tightly hold the oil pipe, so that the inner wall of the third portion 63 will continue to scrape off the oil dirt attached to the outer wall of the oil pipe. The oil dirt scraped by the second rubber cylinder 6 falls back to the third through hole 53, then flows into the space between the outer wall of the first rubber cylinder 4 and the inner wall of the shell 1 through the fourth through hole 54 communicated with the third through hole 53, and finally falls back to the oil well through the fifth through hole 22, so that the oil dirt can be prevented from being brought out of the wellhead to pollute the earth surface.

Because the length of the third part 63 is less than that of the first part 41, the third part 63 can not only scrape off the oil dirt remaining on the outer wall of the oil pipe, but also effectively remove the oil dirt at the joint of the pipeline and the oil pipe. So, can improve the scraping ability of this oil pipe scraper to enlarge the scraping scope, and then can guarantee comparatively thoroughly to cleaing away of oil pipe outer wall oil dirt. And because the oil dirt scraped off by the second rubber cylinder 6 flows out from the fourth through hole 54 on the partition plate 5 and the oil dirt flowing out falls back into the oil well through the fifth through hole 22, the oil dirt can be prevented from being accumulated in the oil pipe scraper, and the oil dirt can be prevented from being brought out of the well mouth to pollute the ground surface.

Optionally, referring to fig. 4 or 5, the oil pipe scraper further comprises a second flange 7; the second flange 7 is connected to the second end 12 of the housing 1.

It should be noted that the second flange 7 is a member for facilitating the handling of the oil pipe scraper. The material and size of the second flange 7 may be set in advance, and for example, the material of the second flange 7 may be stainless steel, alloy, or the like.

In addition, the connection manner between the second end 12 of the housing 1 and the second flange 7 may be preset according to a use requirement, for example, the second end 12 of the housing 1 and the second flange 7 may be welded, screwed, and the like, which is not specifically limited in this embodiment of the application.

Specifically, when the second end 12 of the housing 1 is connected to the second flange 7, the second end 12 of the housing 1 may be connected to the wall of the through hole of the second flange 7. Thus, the oil pipe scraper can be conveniently transported and installed through the second flange 7.

Optionally, referring to fig. 6, 7, 8 or 9, the first portion 41 is provided with a slit 8 in the wall.

It should be noted that, due to the existence of the gap 8, the first portion 41 can satisfy the requirement of radial elasticity, so when oil dirt on the outer wall of the oil pipe in the oil well is thick, and the outer diameter of the oil pipe entering the first portion 41 is larger than the inner diameter of the first portion 41, the oil pipe can still enter the first portion 41, and the gap 8 in the first portion 41 is expanded.

It is noted that the size and shape of the slit 8 may be preset according to the use requirement, for example, the slit 8 may include a transverse slit and a longitudinal slit, and the transverse slit and the longitudinal slit may communicate with each other. The number of the transverse gaps and the number of the longitudinal gaps can be preset according to use requirements, for example, the number of the transverse gaps can be 1, the number of the longitudinal gaps can be 2, and two ends of 1 transverse gap are respectively communicated with 2 longitudinal gaps. Because 2 longitudinal gaps are respectively connected with two ends of the transverse gap, the arrangement positions of the 2 longitudinal gaps on the first part 41 are different, and oil dirt remained when the outer wall of the oil pipe passes through one longitudinal gap can be scraped when the outer wall of the oil pipe passes through the other longitudinal gap.

Optionally, referring to fig. 6, 7, 8 or 9, the tubing scraper further comprises a hook spring 9; the tension spring 9 is fitted over the wall of the first section 41.

The tension spring 9 is a member that operates by elasticity. The size and type of the tension spring 9 can be preset according to the use requirement. For example, the hoop spring 9 may be an extension spring, the hoop spring 9 may also be an annular spring, and the like, which is not limited in the embodiment of the present application.

It should be noted that, since the hoop spring 9 is sleeved on the wall of the first portion 41, when the oil dirt on the outer wall of the oil pipe is gradually scraped off by the inner wall of the first portion 41, the first portion 41 can rebound rapidly, so that the gap opened on the first portion 41 can be closed, and the scraping and cleaning work can be continued.

Further, in order to fix the position of the tension spring 9, referring to fig. 8 or 9, an annular groove is provided on the cylinder wall of the first portion 41, and the tension spring 9 is located in the annular groove.

It should be noted that, both the width and the depth of the annular groove may be preset according to a use requirement, and this is not specifically limited in the embodiment of the present application.

In particular, when the tension spring 9 is provided, the tension spring 9 can be inserted into an annular groove on the cylinder wall of the first part 41. In this way, the position of the tension spring 9 can be secured, so that the tension spring 9 cannot slip off the first part 41.

In the embodiment of the present application, since the inner wall of the second portion 42 in the first rubber cylinder 4 can gradually scrape off part of the oil dirt attached to the outer wall of the oil pipe, and the diameter of the oil pipe is relatively close to the inner diameter of the first portion 41 in the first rubber cylinder 4, after the oil pipe enters the first portion 41 in the first rubber cylinder 4, the inner wall of the first portion 41 can tightly hold the oil pipe, so that the inner wall of the first portion 41 can scrape off the oil dirt attached to the outer wall of the oil pipe. The oil dirt scraped by the first rubber barrel 4 can directly fall back into the oil well through the first through hole 21, so that the oil dirt can be prevented from being brought out of the wellhead to pollute the earth surface. And because this oil pipe scraper adopts first flange 2 and well head to be connected, therefore the position of this oil pipe scraper in the use is comparatively firm.

In order to make the technical solutions and advantages of the present application more clear, the following detailed description will be given by means of alternative embodiments.

When oil dirt on the outer wall of the oil pipe needs to be removed, the oil pipe can be lifted out of the oil well, and then the oil pipe is fixed at the wellhead by the oil pipe elevator. The tubing scraper is then moved by means of the second flange 7 to place the tubing scraper on the tubing elevator and the clean pipe passing through the tubing scraper is connected to the tubing at the wellhead by means of a coupling. Then, the tubing scraper is lifted up by the second flange 7, then the tubing elevator located below the tubing scraper is taken out, then the tubing scraper is placed at the wellhead, and the first flange 2 is connected with the flange at the wellhead.

After the oil pipe scraper is fixed, the pipeline is lifted up to be cleaned, so that the oil pipe connected with the pipeline enters the first rubber cylinder 4 in advance after passing through the first through hole 21, and at the moment, the inner wall of the second part 42 in the first rubber cylinder 4 can gradually scrape off part of oil dirt attached to the outer wall of the oil pipe. After the oil pipe enters the first portion 41 of the first rubber sleeve 4, the inner wall of the first portion 41 will tightly hold the oil pipe, then the inner wall of the first portion 41 will scrape off the oil dirt attached to the outer wall of the oil pipe, and the scraped oil dirt will directly fall back into the oil well through the first through hole 21. Then the oil pipe will pass through the third through hole 53 on the partition plate 5 and enter the second rubber cylinder 6, and the inner wall of the fourth part 64 in the second rubber cylinder 6 will gradually scrape off part of the oil dirt remained and attached on the outer wall of the oil pipe. And after the oil pipe enters the third part 63 in the second rubber cylinder 6, the inner wall of the third part 63 can tightly hold the oil pipe, and then the inner wall of the third part 63 can continuously scrape off the oil dirt remained and attached on the outer wall of the oil pipe and the coupling. The oil dirt scraped by the second rubber cylinder 6 falls back into the third through hole 53, then flows into the space between the outer wall of the first rubber cylinder 4 and the inner wall of the shell 1 through the fourth through hole 54, and finally falls back into the oil well through the fifth through hole 22.

So, when the oil pipe scraper who provides in this application embodiment scrapes the oil dirt on the oil pipe outer wall, the oil dirt that scrapes all can fall back to the oil well in to can avoid oil dirt to be taken out well head pollution earth's surface.

The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An oil pipe scraper, comprising: the device comprises a shell (1), a first flange (2), a gland (3) and a first rubber cylinder (4);

the first rubber cylinder (4) is positioned in the shell (1), a first end (11) of the shell (1) is connected with the first flange (2), and a second end (12) of the shell (1) is connected with the gland (3); a first through hole (21) is formed in the first flange (2), and a second through hole (31) is formed in the gland (3);

the first glue cylinder (4) comprises a first part (41) and a second part (42); the second portion (42) is located between the first portion (41) and the first flange (2); the inner diameter of one end of the second part (42) connected with the first part (41) is the same as that of the first part (41), and the inner diameter of the second part (42) is gradually increased from one end connected with the first part (41) to the other end; the first through hole (21) and the second through hole (31) are communicated with an inner cavity of the first rubber cylinder (4).

2. The oil pipe scraper of claim 1 further comprising: a partition plate (5) and a second rubber cylinder (6);

the partition plate (5) and the second rubber cylinder (6) are both positioned in the shell (1), and the first part (41) is in contact with a first plate surface (51) of the partition plate (5); the second plate surface (52) of the clapboard (5) is contacted with the first end (61) of the second rubber cylinder (6), and the second end (62) of the second rubber cylinder (6) is contacted with the gland (3);

the second glue cylinder (6) comprises a third portion (63) and a fourth portion (64), the third portion (63) being located between the gland (3) and the fourth portion (64); the inner diameter of the third portion (63) is the same as the inner diameter of the first portion (41), and the length of the third portion (63) is smaller than the length of the first portion (41); the inner diameter of one end, connected with the third part (63), of the fourth part (64) is the same as that of the third part (63), and the inner diameter of the fourth part (64) is gradually increased from one end, connected with the third part (63), to the other end;

the partition plate (5) is provided with a third through hole (53) in the longitudinal direction, the aperture of the third through hole (53) is larger than the inner diameter of the third part (63), and the inner cavity of the first rubber cylinder (4) and the inner cavity of the second rubber cylinder (6) are both communicated with the third through hole (53); the partition plate (5) is provided with a fourth through hole (54) in the transverse direction, and the fourth through hole (54) is communicated with the third through hole (53);

the inner diameter of the shell (1) is larger than the diameter of the partition plate (5) and larger than the outer diameter of the first rubber cylinder (4); and a fifth through hole (22) is formed in the position, between the outer wall of the first rubber cylinder (4) and the inner wall of the shell (1), of the first flange (2).

3. The oil pipe scraper as claimed in claim 1 or 2, characterized in that it further comprises a second flange (7);

the second flange (7) is connected to a second end (12) of the housing (1).

4. Oil pipe scraper according to claim 1 or 2, characterized in that the wall of the first portion (41) is provided with slits (8).

5. The oil pipe scraper as claimed in claim 4, further comprising a hook spring (9);

the hoop spring (9) is sleeved on the wall of the first part (41).

6. The oil pipe scraper as claimed in claim 5, characterized in that the first portion (41) is provided with an annular groove in the wall thereof, said hook spring (9) being located in said annular groove.

7. Oil pipe scraper according to claim 4, characterized in that the slits (8) comprise transverse slits and longitudinal slits.

8. The tubing scraper according to claim 1, characterized in that the gland (3) is threadedly connected to the second end (12) of the housing (1).

9. The oil pipe scraper of claim 1 further comprising a pin;

the gland (3) is connected with the second end (12) of the shell (1) through the pin.

10. The oil pipe scraper as claimed in claim 1, characterized in that said first through hole (21) comprises a fifth portion (211) and a sixth portion (212);

the fifth portion (211) is located between the first glue cylinder (4) and the sixth portion (212); the bore diameter of the fifth portion (211) is the same as the maximum inner diameter of the second portion (42); the aperture of the end of the sixth part (212) connected with the fifth part (211) is the same as that of the fifth part (211), and the aperture of the sixth part (212) is gradually increased from the end connected with the fifth part (211) to the other end.