CN210939068U

CN210939068U - Lining pipe drawing device

Info

Publication number: CN210939068U
Application number: CN201921636643.XU
Authority: CN
Inventors: 李代强; 周丹; 曹润欣; 李莲; 王建春; 段正超; 程娟; 张雪
Original assignee: Karamay Shuangxin Anti Corrosion Technology Co ltd
Current assignee: Xinjiang Defeng Yisheng petroleum Anticorrosion Engineering Co., Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-07-07
Anticipated expiration: 2029-09-27

Abstract

The utility model discloses a lined pipe draw-off gear for the lined pipe of oil conveying pipeline is changed, include: the sleeve is of a hollow cylindrical structure, and a plurality of strip-shaped holes are uniformly formed in the wall surface of the sleeve along the circumferential direction; the expansion tooth is integrally a strip-shaped object and is matched with the shape and the size of the strip-shaped hole on the sleeve, a plurality of teeth are arranged at intervals on one side of the expansion tooth, and after the expansion tooth is placed in the strip-shaped hole, the teeth face to the outside; the oblique cone penetrates through the sleeve and can move along the axial direction of the sleeve; during the process of drawing the lining pipe, the axial movement of the oblique cone extrudes the expansion teeth to move towards the outer side, and the expansion teeth penetrate into the lining pipe and pull the lining pipe out of the petroleum transmission pipeline during the drawing process. The utility model discloses a draw-off gear can effectively overcome among the prior art draw the frock structure complicated, draw the process comparatively loaded down with trivial details and consume artificial shortcoming.

Description

Lining pipe drawing device

Technical Field

The utility model relates to a mechanical tool field, in particular to bushing pipe draw-off gear in oil pipe that oil field used.

Background

Petroleum plays a very important role in the current national economic structure of China. Due to the influence of factors such as environment, soil and conveying media, the pipeline is abraded, corroded, damaged and even scrapped, so that the pipeline needs to be repaired or partially replaced. Abrasion and corrosion are one of the main causes of damage to metal pipes in the petroleum industry, which greatly reduces the service life of the pipes and increases the petroleum production cost. Along with the rolling development of the oil field, the produced liquid of the oil field gradually enters a medium-water-content period and a high-water-content period, the corrosion problem in an oil gas gathering and transportation pipe network is more and more serious, and the safety production of oil extraction is seriously influenced. The lining polymer oil pipe is generally a layer of special ultra-high molecular weight polyethylene pipe lined in a common steel oil pipe, so that the lining pipe and the oil pipe are tightly attached together to form a pipe-in-pipe structure.

Most lining pipes adopted in the prior art are made of ultra-high molecular weight polyethylene, but the lining pipes need to be replaced independently due to the problems of corrosion, scraping, cracking and the like after the materials are used for a period of time. In particular, a repair pipe in an oil field is formed by combining an oil pipe and an inner lining pipe on the inner wall, and when the inner lining pipe is damaged or the service life of the repair pipe is expired, the inner lining pipe needs to be newly inserted, the old inner lining pipe needs to be pulled out, and then a new inner lining pipe needs to be inserted again. The traditional lining pipe drawing method comprises the following steps: 1) the screwing machine adopts a drawing mode after screwing, and the method has complex working procedures and low efficiency; 2) the screw rod is screwed and expanded, the mode is excessively labor-consuming, and the used tool is easily damaged; 3) the cutter type drawing method is to longitudinally divide the lining pipe and then draw out the lining pipe by using a cutter, and the method increases the cutting process and has low efficiency.

Chinese patent CN204450400U discloses a similar way of pulling after screwing up of a screwing machine. The drawing of the lining pipe is carried out in the following way: after a guiding and positioning mechanism of the screwing guide device is inserted into a port of the lining oil pipe, the screwing guide device is axially pushed and rotated through a wrench clamp, as the high polymer polyethylene material is softer and has higher strength and elasticity compared with steel, the spiral cutting mechanism can tap threads on the inner wall of the lining pipe, when the spiral cutting mechanism is screwed into the lining pipe to 2/3, the screwing guide device is tightly combined with the lining pipe, one end of the pull rod is connected with the pull rod connecting piece, the other end of the pull rod penetrates through the fixed baffle plate and is clamped by the clamp, the puller drives the puller to move forwards, and the lining pipe is taken out. The drawing tool and the drawing process are complex and need to consume certain labor.

Therefore, a drawing device with simple structure and convenient operation is needed, so as to improve the efficiency of drawing and replacing the lining pipe and reduce the labor cost to the utmost extent.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lined pipe draw-off gear to overcome among the prior art and draw the frock structure complicated, draw the comparatively loaded down with trivial details and consume artificial shortcoming of process.

In order to achieve the above object, according to the utility model discloses an aspect, the utility model provides a lined pipe drawing device for the lined pipe of oil conveying pipeline is changed, include: the sleeve is of a hollow cylindrical structure, and a plurality of strip-shaped holes are uniformly formed in the wall surface of the sleeve along the circumferential direction; the expansion tooth is integrally a strip-shaped object and is matched with the shape and the size of the strip-shaped hole on the sleeve, a plurality of teeth are arranged at intervals on one side of the expansion tooth, and after the expansion tooth is placed in the strip-shaped hole, the teeth face to the outside; the oblique cone penetrates through the sleeve and can move along the axial direction of the sleeve; during the process of drawing the lining pipe, the axial movement of the oblique cone extrudes the expansion teeth to move towards the outer side, and the expansion teeth penetrate into the lining pipe and pull the lining pipe out of the petroleum transmission pipeline during the drawing process.

Further, in the above technical solution, the power for drawing the lining pipe may be provided by a tractor.

Further, among the above-mentioned technical scheme, the number of the bar holes on the sleeve can be set to four, and set up for two liang of symmetry of sleeve axis.

Furthermore, in the above technical scheme, the inner side surface of the expansion tooth is an inclined surface, and the inclination angle of the inclined surface is matched with the inclination angle of the inclined cone.

Further, in the above technical solution, the inclination angle of the oblique cone may be set to 3 to 5 degrees.

Furthermore, in the above technical scheme, the teeth on the outer side surface of the expansion tooth comprise a straight portion and an inclined portion, and an included angle between the straight portion and the inclined portion can be 30-60 degrees. The straight portion may be disposed toward the drawing direction.

Further, among the above technical scheme, the lining pipe drawing device further comprises a traction part, and the tractor draws the oblique cone through the traction part, so as to draw out the lining pipe. The traction part can be arranged into a rod shape, one end of the traction part is detachably connected with the oblique cone, and the other end of the traction part is provided with an elbow used for connecting a traction rope.

Furthermore, in the technical scheme, clearance fit is formed between the sleeve and the lining pipe and between the expansion teeth and the strip-shaped holes of the sleeve.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) due to the split detachable design of the sleeve, the expansion teeth, the oblique cone and the traction part, one of the components can be independently replaced when damaged, and the rest components can be continuously used, so that the cost is greatly saved;

2) the power for drawing the lining pipe is provided by the tractor, so that inconvenience and low efficiency caused by manual drawing are avoided;

3) the design that the straight part of the expansion tooth faces the drawing direction can maximize the stress area of the part penetrating into the lining pipe, and effectively increase the friction force; the angle between the inclined part and the straight part is selected to avoid stress concentration to the maximum extent, and the service life of the expansion tooth is effectively prolonged.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to make the technical means more comprehensible, and to make the above and other objects, technical features, and advantages of the present invention easier to understand, one or more preferred embodiments are listed below, and the following detailed description is given with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the overall structure of the bushing pipe drawing device of the present invention.

Fig. 2 is an exploded view of the drawing device for the lining pipe of the present invention.

Fig. 3A is a perspective view of the sleeve of the bushing pipe drawing device of the present invention.

Fig. 3B is a cross-sectional view of the sleeve of the bushing pulling device of the present invention.

Fig. 4 is a side view of the expansion teeth of the bushing pipe drawing device of the present invention.

Fig. 5 is a schematic structural view of the oblique cone in the bushing pipe drawing device of the present invention.

Fig. 6 is a schematic structural view of a traction part in the bushing pipe drawing device of the present invention.

Fig. 7 is a cross-sectional view of the bushing pipe drawing device of the present invention after the expansion teeth and the oblique cone are installed in the sleeve.

Fig. 8 is a schematic view showing a drawing structure of the inner liner tube by using the drawing device of the present invention.

Description of the main reference numerals:

1-sleeve, 11-strip-shaped hole;

2-expansion teeth, 21-teeth, 210-inner side, 211-straight, 212-inclined;

3-oblique cone, 31-oblique plane;

4-traction part, 41-elbow;

5-a connector; 6-lining the tube.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

Spatially relative terms, such as "below," "lower," "upper," "above," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the object in use or operation in addition to the orientation depicted in the figures. For example, if the items in the figures are turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the elements or features. Thus, the exemplary term "below" can encompass both an orientation of below and above. The article may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein should be interpreted accordingly.

In this document, the terms "first", "second", etc. are used to distinguish two different elements or portions, and are not used to define a particular position or relative relationship. In other words, the terms "first," "second," and the like may also be interchanged with one another in some embodiments.

As shown in fig. 1 and 2, the utility model discloses a lined pipe draw-off device for drawing out old lined pipe from the pipeline when changing the lined pipe of oil conveying pipeline, this draw-off device specifically includes: the expansion joint comprises a sleeve 1, expansion teeth 2, a bevel cone 3 and a traction part 4, wherein the traction part 4 is detachably connected with the bevel cone 3 through a connecting piece 5. As further shown in fig. 3A and 3B, the sleeve 1 is a hollow cylindrical structure, and a plurality of strip-shaped holes 11 are uniformly formed in the wall surface of the sleeve along the circumferential direction. Preferably, but not limitatively, the number of the strip-shaped holes 11 on the sleeve 1 is four, and two by two symmetrical arrangement with respect to the sleeve axis (cross arrangement in the cross-section of fig. 3B). The whole of the expansion teeth 2 is a strip-shaped object and is matched with the shape and the size of the strip-shaped hole 11 on the sleeve 1, referring to fig. 2, the expansion teeth 2 can be arranged in the strip-shaped hole 11, and in order to ensure that the expansion teeth can be smoothly extruded outwards, the expansion teeth and the sleeve can be in clearance fit. A plurality of teeth 21 are arranged at intervals on one side (the outer side in fig. 2) of the installed expansion tooth, namely, after the expansion tooth 2 is placed into the strip-shaped hole 11, the teeth 21 face to the outer side. The oblique cone 3 is arranged in the sleeve 1 in a penetrating way and can move along the axial direction of the sleeve 1, and further referring to fig. 7 and 8, in the process of drawing the lining pipe 6, the axial movement (namely, the upward movement in fig. 7) of the oblique cone 3 extrudes the expansion teeth 2 to move outwards (namely, the left and right movement in fig. 7), and the expansion teeth 2 penetrate into the lining pipe 6 and pull the lining pipe out of the petroleum transmission pipeline in the drawing process.

The utility model discloses a lining pipe draw-off gear is all outstanding more to manpower, material and time cost do. From the aspect of material saving, due to the split detachable design of the sleeve, the expansion teeth, the oblique cone and the traction part, one of the components can be independently replaced when damaged, and the rest components can be continuously used, so that the cost is greatly saved. From artifical and the angle of efficiency, the utility model discloses a device is drawn by the tractor through hanging the tractive rope on the traction part, and the power that the bushing pipe was drawn promptly is provided by the tractor, has avoided the manual work to draw inconvenience and inefficiency that bring.

As further shown in fig. 4, the inner side surface 210 of the expansion tooth is a slope, and with reference to fig. 5 and 7, the slope angle of the slope is matched with the slope angle of the oblique cone, that is, the slope directions of the slope and the oblique cone are opposite, so that when the oblique cone 3 moves in the upward direction of fig. 7, the oblique cone 3 presses the slope of the expansion tooth 2, so that the expansion tooth 2 moves outward along the strip-shaped hole of the sleeve 1. Preferably, but not limited to, the inclination angle of the oblique cone may be designed to be 3 to 5 degrees.

As further shown in fig. 4, the teeth 21 on the outer side surface of the expansion tooth 2 include a straight portion 211 and a tilted portion 212, and the angle between the straight portion 211 and the tilted portion 212 is 30 to 60 degrees, preferably 45 degrees. The design that straight portion orientation was drawn the direction can make the partial lifting surface area maximize that pierces interior bushing pipe, increases frictional force. The angle between the inclined part and the straight part is selected to avoid the stress concentration effect to the maximum extent, and the service life of the expansion tooth 2 is effectively prolonged. In order to increase the strength of the teeth 21, it is subjected to a quenching process.

As shown in fig. 6, the lining pipe drawing device draws the lining pipe by using a tractor as power, and the tractor (not shown) draws the tapered cone 3 by pulling a traction rope on the traction portion 4, thereby drawing out the lining pipe 6. Preferably, but not limitatively, the traction part 4 is made in the shape of a rod as shown in fig. 6, one end of which is detachably connected to the oblique cone 3 by a connector 5, and the other end is provided as an elbow 41, and the pulling of the oblique cone 3 is driven by hanging a traction rope on the elbow 41.

Further as shown in fig. 8, the utility model discloses a bushing pipe draw-off gear can design out sleeve 1's external diameter according to the internal diameter size of bushing pipe in the old, adopts clearance fit between sleeve 1 and the bushing pipe 6, guarantees that sleeve 1 who has expansion teeth 2 can easily get into in the old bushing pipe. The utility model discloses can design inflation tooth 2 according to the internal diameter of oil pipeline (being steel oil pipe), make inflation tooth 2 be close to the oil pipe inner wall, nevertheless can not pierce through old inside lining pipe. The utility model discloses can guarantee under the effect of pulling of tractor according to interior bushing pipe expansion tooth 2's inclination design awl 3, expansion tooth 2 can outwards expand completely.

The utility model discloses interior bushing pipe draw-off gear is when using, at first with sleeve, inflation tooth, oblique cone and traction part equipment together, then insert the draw-off gear after assembling and treat drawing interior bushing pipe, hang the haulage rope in the elbow department of traction part, start the tractor at last and pull out old interior bushing pipe. Take out and reversely tap the pars flava of traction portion behind the old interior bushing pipe, make inflation tooth and interior bushing pipe break away from to will the utility model discloses a drawing device wholly takes out.

The utility model discloses a welt pipe draw-off gear adopts the tractor to drag the inflation, need not consume a large amount of labours to the process is simplified the consumption that can the greatly reduced time. The utility model discloses a drawing device is more durable, and life compares with current drawing device, has prolonged about seven eighty times, has reduced the cost simultaneously, and vulnerable part for example the expansion gear damage back only need change single part can.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. Any simple modifications, equivalent changes and modifications made to the above exemplary embodiments shall fall within the scope of the present invention.

Claims

1. The utility model provides a lining pipe draw-off gear for oil conveying pipeline's lining pipe is changed, its characterized in that includes:

the sleeve is of a hollow cylindrical structure, and a plurality of strip-shaped holes are uniformly formed in the wall surface of the sleeve along the circumferential direction;

the expansion tooth is integrally a strip-shaped object and is matched with the shape and the size of the strip-shaped hole in the sleeve, a plurality of teeth are arranged on one side of the expansion tooth at intervals, and after the expansion tooth is placed in the strip-shaped hole, the teeth face to the outside;

the oblique cone penetrates through the sleeve and can move along the axial direction of the sleeve; and in the process of drawing the lining pipe, the axial movement of the oblique cone extrudes the expansion teeth to move outwards, and the expansion teeth penetrate into the lining pipe and pull the lining pipe out of the petroleum conveying pipeline in the drawing process.

2. The apparatus of claim 1, wherein the power for drawing the lining pipe is provided by a tractor.

3. The apparatus of claim 1 or 2, wherein the number of the strip holes on the sleeve is four, and the two holes are arranged symmetrically with respect to the sleeve axis.

4. The apparatus of claim 3, wherein the inner side of the expansion teeth is a bevel, and the bevel is inclined at an angle corresponding to the angle of the bevel cone.

5. The apparatus of claim 4, wherein the angle of inclination of the beveled cone is 3 to 5 degrees.

6. The liner tube pulling apparatus of claim 3, wherein the teeth of the outer side of the expansion teeth include a straight portion and a sloped portion, the straight portion being at an angle of 30-60 degrees to the sloped portion.

7. The liner tube pulling apparatus of claim 6, wherein the straight portion is directed in the pulling direction.

8. The apparatus of claim 2, further comprising a pulling part through which the tractor pulls the tapered cone, thereby pulling out the lining pipe.

9. The apparatus of claim 8, wherein the pulling portion is rod-shaped, one end of the pulling portion is detachably connected to the oblique cone, and the other end of the pulling portion is provided with an elbow for connecting a pulling rope.

10. The apparatus of claim 1, wherein the sleeve is in clearance fit with the lining pipe, and the expansion teeth are in clearance fit with the strip-shaped holes of the sleeve.