CN113550708B - Oil field casing pipe shaping device - Google Patents

Abstract

The invention relates to the field of well drilling and repairing equipment and systems, in particular to an oil field casing shaping device, and aims to solve the problems that the existing oil field casing shaping device damages a casing in the casing shaping process and does not have a scraping function. This oil field sleeve pipe shaping device, it rotates with lower cam to drive the cam through the stock, it removes with lower thread bush to drive thread bush simultaneously, go up the thread bush and when lower thread bush is close to each other, through last connecting rod, lower connecting rod drives the shaping piece and stretches out from the lateral wall hole of plastic casing, the rotation of going up cam and lower cam drives four side wall holes of scraping the piece and retracting simultaneously and scraping the casing, it reciprocates to make the shaping piece carry out the plastic to the sleeve pipe inner wall to drive shaping device through wellhead equipment this moment, roll on the sleeve pipe wall through the gyro wheel on the shaping piece, realize the plastic operation of casing pipe in the pit, can not change the thickness of sleeve pipe wall, can reduce the damage that the sleeve pipe caused in the sleeve pipe plastic process.

Description

Oilfield casing shaping device

technical field

The invention relates to the field of drilling and workover equipment and systems, in particular to an oil field casing shaping device.

Background technique

Oil casing is a steel pipe used to support the walls of oil and gas wells to ensure the normal operation of the entire oil well after the drilling process and completion. Over time, damage has gradually appeared in different degrees and types.

The effective methods of casing plastic repair in the prior art are roughly divided into two types: mechanical plastic surgery and explosive plastic surgery. Because explosive plastic surgery is easy to cause damage to the casing and has potential safety hazards, it has not been used in recent years; mechanical plastic surgery generally damages the casing , sacrificing casing thickness, long construction period and high cost, and the existing casing shaping device does not have the scraping function and cannot remove the dirt on the inner wall of the casing. Therefore, it is necessary to develop an oilfield casing shaping device. It is used to reduce the damage to the casing during the casing shaping process, and has the scraping function at the same time.

Contents of the invention

The invention provides an oil field casing shaping device to solve the problem that the existing oil field casing shaping device causes damage to the casing during the casing shaping process and does not have a scraping function.

In order to achieve the above object, the present invention provides an oil field casing shaping device, comprising a scraping shell, the lower end of the scraping shell is fixedly mounted with a shaping shell, the lower end of the shaping shell is fixedly mounted with a conical head, and the side wall of the scraping shell The scraping block is installed on the hole, the shaping block is installed on the side wall hole of the shaping shell, and the servo motor is installed on the inner upper end of the scraping shell. section, upper threaded section, separating section, lower threaded section and limit section, the thread pitches of the upper threaded section and the lower threaded section are equal, and the direction of rotation is opposite, the upper cam and the lower cam are fixedly installed on the polished rod section, and the The upper threaded sleeve, the lower threaded sleeve is installed on the lower threaded section, the upper threaded sleeve and the lower threaded sleeve are connected to the shaping block through the upper connecting rod and the lower connecting rod respectively, two ejector rods are symmetrically installed on the lower cam, and the upper cam is symmetrically installed Two ejector rods, the angle between the ejector rod installed on the lower cam and the ejector rod installed on the upper cam is 90°, the ejector rod is slidably installed in the guide bracket, and the guide bracket is fixed on the inner wall of the scraping shell, the ejector rod It is fixedly connected with the wedge block, and the wedge block is slidably connected with the scraping block.

In the above oilfield casing shaping device, optionally, the upper cam includes an upper cam body, the center of the upper cam body is provided with an upper cam center hole, and the outer wall of the upper cam body is provided with a first helical groove and a second helical groove. Groove, the structure and size of the first helical groove and the second helical groove are equal, the lowest end of the first helical groove is located directly below the highest end of the second helical groove, and the highest end of the first helical groove is located at the second helical groove Directly above the lowest end of the groove, the angle between the highest end of the first helical groove and the highest end of the second helical groove is 180°, and the angle between the lowest end of the first helical groove and the lowest end of the second helical groove 180°, two ejector rods are installed symmetrically on the upper cam, and the two ejector rods matched with the upper cam respectively cooperate with the first spiral groove and the second spiral groove, and the spiral groove on the lower cam is connected with the spiral groove on the upper cam. The direction of rotation is opposite.

In the above oilfield casing shaping device, optionally, the scraping block includes a scraping block body, a long chute is provided on the inclined surface of the scraping block body, and a wear-resistant layer is provided on the arc surface of the scraping block body.

In the above-mentioned oilfield casing shaping device, optionally, the wedge block includes a wedge body, the upper end surface of the wedge body is provided with a wedge hole, and the wedge hole is fixed to the cylindrical end of the vertical section of the push rod To connect, a long slide bar is arranged on the inclined surface of the wedge body, and the long slide bar cooperates with the long chute.

In the above oilfield casing shaping device, optionally, the guide bracket includes a guide bracket body, a rectangular hole is set at the center of the guide bracket body, and a support rod is fixed on the outer wall of the guide bracket body, and the support rod is fixed in the scraping shell on the wall.

In the above oilfield casing shaping device, optionally, the shaping block includes a shaping block body, the shaping block body is U-shaped as a whole, rollers are installed on one side, and two shaping block connecting parts are fixedly installed on the other side. The connecting part of the shaping block is respectively connected with the upper threaded sleeve and the lower threaded sleeve through the upper connecting rod and the lower connecting rod.

In the above oilfield casing shaping device, optionally, the number of shaping blocks is four or six.

In the above oilfield casing shaping device, optionally, an upper support plate and a lower support plate are installed on the long rod, and both the upper support plate and the lower support plate are fixedly installed on the inner wall of the scraping shell.

In the above oilfield casing shaping device, optionally, through holes are evenly distributed on the circumference of the tapered head.

In the above oilfield casing shaping device, optionally, the servo motor is fixed on the inner wall of the scraping housing through a motor bracket.

The oilfield casing shaping device provided by the present invention drives the upper cam and the lower cam to rotate through the long rod, and at the same time drives the upper threaded sleeve and the lower threaded sleeve to move. When the upper threaded sleeve and the lower threaded sleeve are close to each other, the The rod drives the shaping block to protrude from the side wall hole of the shaping shell, the rotation of the upper cam and the lower cam drives the four scraping blocks to retract into the side wall hole of the scraping shell at the same time, and the wellhead equipment drives the shaping device to move up and down so that the shaping block is aligned The inner wall of the casing is shaped, and the roller on the shaping block rolls on the casing wall to realize the shaping operation of the downhole casing without changing the thickness of the casing wall, which can reduce the damage to the casing during the casing shaping process ; When the upper threaded sleeve and the lower threaded sleeve are far away from each other, the upper connecting rod and the lower connecting rod drive the shaping block to retract into the side wall hole of the shaping shell, and the rotation of the upper cam and the lower cam drives the four scraping blocks to stretch out for scraping at the same time The side wall hole of the shell is driven by the wellhead equipment to rotate the shaping device to make the scraping block scrape the inner wall of the casing to complete the scraping operation; by changing the rotation angle of the long rod, the shaping diameter of the shaping block can be changed, and the scraping diameter of the scraping block can be changed at the same time. The shaping device can be used to repair various casings with different diameters, which saves the operation time for repairing the downhole casing and reduces the cost of repairing the downhole casing.

The structure of the present invention as well as its other invention objectives and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of the overall structure of an oilfield casing shaping device provided by an embodiment of the present invention;

Fig. 2 is a first cross-sectional structural schematic diagram of an oilfield casing shaping device provided by an embodiment of the present invention;

Fig. 3 is a second cross-sectional structural schematic diagram of an oilfield casing shaping device provided by an embodiment of the present invention;

Fig. 4 is a top view structural schematic diagram of an oilfield casing shaping device provided by an embodiment of the present invention;

Fig. 5 is a schematic diagram of the first structure of the upper cam of the oilfield casing shaping device provided by the embodiment of the present invention;

Fig. 6 is a second structural schematic diagram of the upper cam of the oilfield casing shaping device provided by the embodiment of the present invention;

Fig. 7 is a schematic structural view of the scraping block of the oilfield casing shaping device provided by the embodiment of the present invention;

Fig. 8 is a structural schematic diagram of a wedge-shaped block of an oilfield casing shaping device provided by an embodiment of the present invention;

Fig. 9 is a structural schematic diagram of a guide bracket of an oilfield casing shaping device provided by an embodiment of the present invention;

Fig. 10 is a schematic structural view of the shaping block of the oilfield casing shaping device provided by the embodiment of the present invention.

Explanation of reference signs:

1 - scraping shell;

2- scraping block;

201-scraping block body; 202-wear-resistant layer; 203-long chute;

3- Shaping shell;

4- shaping block;

401-reshaping block body; 402-roller; 403-reshaping block connection;

5-tapered head; 501-through hole;

6-motor bracket;

7 - servo motor;

8-Coupling;

9 - long pole;

901-polished rod section; 902-upper threaded section; 903-separation section; 904-lower threaded section; 905-limiting section;

10-upper cam;

1001-upper cam body; 1002-upper cam center hole; 1003-first helical groove; 1004-second helical groove;

11 - lower cam;

12- ejector rod;

13 - guide bracket;

1301-guiding bracket body; 1302-rectangular hole; 1303-support rod;

14 - wedge block;

1401-wedge block body; 1402-wedge block round hole; 1403-long slide bar;

15-upper thread sleeve;

16-upper link;

17-lower threaded sleeve;

18-lower link;

19-upper support plate;

20-lower support plate.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 4, the present invention provides an oilfield casing shaping device, including a scraping shell 1, a shaping shell 3 is fixedly installed at the lower end of the scraping shell 1, and a conical head is fixedly installed at the lower end of the shaping shell 3 Part 5, the scraping block 2 is installed on the side wall hole of the scraping shell 1, the shaping block 4 is installed on the side wall hole of the shaping shell 3, the servo motor 7 is installed on the inner upper end of the scraping shell 1, and the rotating shaft of the servo motor 7 passes through the joint The shaft device 8 is connected with the long rod 9, and the long rod 9 from top to bottom is a polished rod section 901, an upper threaded section 902, a partition section 903, a lower threaded section 904, a limiting section 905, an upper threaded section 902 and a lower threaded section 904 The pitches of the screw threads are equal and the direction of rotation is opposite. The upper cam 10 and the lower cam 11 are fixedly installed on the polished rod section 901, the upper threaded sleeve 15 is installed on the upper threaded section 902, the lower threaded sleeve 17 is installed on the lower threaded section 904, and the upper threaded sleeve 15 , the lower threaded sleeve 17 is respectively connected with the shaping block 4 through the upper connecting rod 16, the lower connecting rod 18, two push rods 12 are symmetrically installed on the lower cam 11, two push rods 12 are symmetrically installed on the upper cam 10, and the lower cam 11 The included angle between the ejector rod 12 installed on the upper cam 10 and the ejector rod 12 installed on the upper cam 10 is 90°, the ejector rod 12 is slidably installed in the guide bracket 13, and the guide bracket 13 is fixed on the inner wall of the scraping housing 1, and the ejector rod 12 is fixedly connected with the wedge block 14, and the wedge block 14 is slidably connected with the scraping block 2.

It should be noted that between the scraping shell 1 and the shaping shell 3, and between the shaping shell 3 and the conical head 5, preferably threaded connections are convenient for installation and disassembly; the polished rod section 901 and the upper cam 10 and the polished rod section 901 and the The preferred key connection between the lower cams 11; the preferred integrated structure of the long rod 9; two scraping blocks 2 are installed symmetrically above the scraping housing 1, and two scraping blocks 2 are symmetrically installed below the scraping housing 1; the upper connecting rod 16 and The length of the lower connecting rod 18 is equal, and the long rod 9 of the rotation drives the upper threaded sleeve 15 and the lower threaded sleeve 17 to approach or move away from each other. The rod 18 drives the shaping block 4 to protrude from the side wall hole of the shaping shell 3; when the upper threaded sleeve 15 and the lower threaded sleeve 17 are separated from each other, the upper connecting rod 16 and the lower connecting rod 18 drive the shaping block 4 to retract into the shaping shell 3 in the side wall hole.

Further, as shown in FIGS. 1-5 , the upper cam 10 includes an upper cam body 1001, the center of the upper cam body 1001 is provided with an upper cam center hole 1002, and the outer wall of the upper cam body 1001 is provided with a first spiral groove 1003 and The second helical groove 1004, the structure and size of the first helical groove 1003 and the second helical groove 1004 are all equal, and the lowest end of the first helical groove 1003 is positioned at the highest end of the second helical groove 1004. The highest end of 1003 is located directly above the lowest end of the second helical groove 1004, the angle between the highest end of the first helical groove 1003 and the highest end of the second helical groove 1004 is 180°, and the lowest end of the first helical groove 1003 The angle between one end of one end and the lowest end of the second helical groove 1004 is 180°, and two push rods 12 are symmetrically installed on the upper cam 10, and the two push rods 12 matched with the upper cam 10 are respectively connected with the first helical groove 1003 and the second helical groove 1003. The two helical grooves 1004 cooperate, and the helical groove on the lower cam 11 is opposite to the helical groove on the upper cam 10 .

It should be noted that the rotation of the upper cam 10 drives the two push rods 12 matched with it to slide up and down in the guide bracket 13, and the movement of the push rod 12 drives the wedge block 14 to move accordingly, and the wedge block 14 drives the scraping block 2 to scrape. The side wall hole of the housing 1 moves upward; the rotation of the lower cam 11 drives the two ejector rods 12 that cooperate with it to slide up and down in the guide bracket 13, and the movement of the ejector rod 12 drives the wedge block 14 to move accordingly, and the wedge block 14 drives The scraping block 2 moves on the side wall hole of the scraping shell 1; during the rotation of the upper cam 10 and the lower cam 11, the rotation of the upper cam 10 and the lower cam 11 drives the four scraping blocks 2 to retract or extend out of the scraping shell at the same time 1 hole in the side wall.

The servo motor 7 drives the long rod 9 to rotate, realizing the synchronous action of the scraping block 2 and the shaping block 4, and improving the downhole operation efficiency. When the scraping block 2 extends out of the side wall hole of the scraping shell 1, the shaping block 4 retracts into the shaping shell 3, so as to facilitate the scraping operation; when the scraping block 2 retracts into the side wall hole of the scraping shell 1, the shaping block 4 extends out of the side wall hole of the shaping shell 3, so as to carry out the shaping operation, specifically, The rotation of the servo motor 7 drives the long rod 9 to rotate, and the rotating long rod 9 drives the upper cam 10 and the lower cam 11 to rotate, and simultaneously drives the upper threaded sleeve 15 and the lower threaded sleeve 17 to approach or move away from each other, and the long rod 9 drives the upper threaded sleeve 15 and the lower threaded sleeve 17 approached each other, the upper connecting rod 16 and the lower connecting rod 18 drove the shaping block 4 to stretch out from the side wall hole of the shaping housing 3, and at the same time the rotation of the upper cam 10 and the lower cam 11 drove the four The two scraping blocks 2 retract into the side wall hole of the scraping shell 1 at the same time. After the shaping block and the scraping block reach a suitable position, the servo motor 7 stops the long rod 9, and the wellhead equipment drives the shaping device to move up and down so that the shaping blocks 4 are in pairs. The inner wall of the tube is shaped to complete the shaping operation; when the long rod 9 drives the upper threaded sleeve 15 and the lower threaded sleeve 17 to move away from each other, the upper connecting rod 16 and the lower connecting rod 18 drive the shaping block 4 to retract into the side wall hole of the shaping shell 3 At the same time, the rotation of the upper cam 10 and the lower cam 11 drives the four scraping blocks 2 to extend out of the side wall hole of the scraping housing 1 at the same time. After the shaping block and the scraping block reach a suitable position, the servo motor 7 makes the long rod 9 stop. The wellhead equipment drives the shaping device to rotate so that the scraping block 2 scrapes the inner wall of the casing to complete the scraping operation.

Further, as shown in FIGS. 1-6 , the scraping block 2 includes a scraping block body 201 , a long chute 203 is set on the slope of the scraping block body 201 , and a wear-resistant layer 202 is set on the arc surface of the scraping block body 201 .

It should be noted that the arc surface of the scraping block body 201 is used to scrape the inner wall of the casing, the horizontal plane and the vertical surface of the scraping block body 201 are matched with the side wall hole of the scraping housing 1, and the inclined surface of the scraping block body 201 is provided The cross section of the long chute 203 is a dovetail shape.

Further, as shown in Fig. 1-Fig. 7, wedge block 14 comprises wedge block body 1401, and the upper end surface of wedge block body 1401 is provided with wedge block circular hole 1402, and wedge block circular hole 1402 is connected with the cylinder of the vertical section of push rod 12. The ends are fixedly connected, and a long sliding bar 1403 is arranged on the inclined surface of the wedge body 1401 , and the long sliding bar 1403 cooperates with the long chute 203 .

It should be noted that the cross section of the long sliding groove 203 and the long sliding bar 1403 is a dovetail shape, which effectively increases the connection stability between the long sliding bar 1403 and the long sliding groove 203 .

Further, as shown in Figures 1-8, the guide bracket 13 includes a guide bracket body 1301, a rectangular hole 1302 is set at the center of the guide bracket body 1301, a support rod 1303 is fixed on the outer wall of the guide bracket body 1301, and the support rod 1303 is fixed On the inner wall of scraper housing 1.

It should be noted that the rectangular hole 1302 cooperates with the vertical section of the ejector rod 12 to prevent the ejector rod 12 from rotating when moving up and down.

Further, as shown in Figures 1-9, the shaping block 4 includes a shaping block body 401, the shaping block body 401 is U-shaped as a whole, a roller 402 is installed on one side, and two shaping block connecting parts 403 are fixedly installed on the other side, The two shaping block connecting parts 403 are respectively connected with the upper threaded sleeve 15 and the lower threaded sleeve 17 through the upper connecting rod 16 and the lower connecting rod 18 .

It should be noted that a plurality of rollers 402 are arranged in the vertical direction, one end of the upper connecting rod 16 is rotatably connected with the upper threaded sleeve 15, the other end is rotatably connected with the shaping block connecting portion 403, and one end of the lower connecting rod 18 is connected with the lower threaded sleeve. 17 is rotatably connected, and the other end is rotatably connected with the shaping block connecting part 403.

Further, as shown in FIGS. 1-4 , the number of shaping blocks 4 is four or six.

It should be noted that the number of shaping blocks 4 is an even number, and the circumference is evenly distributed on the shaping shell 3, which effectively increases the force balance of the shaping shell 3 during the shaping process.

Further, as shown in FIGS. 2-3 , an upper support plate 19 and a lower support plate 20 are installed on the long rod 9 , and both the upper support plate 19 and the lower support plate 20 are fixedly installed on the inner wall of the scraping housing 1 .

It should be noted that the long rod 9 is rotationally connected with the upper support plate 19 and the lower support plate 20 , and the upper support plate 19 and the lower support plate 20 are provided with flow holes allowing fluid to pass through.

Further, as shown in FIGS. 1-3 , through-holes 501 are evenly distributed on the circumference of the tapered head 5 .

It should be noted that after using for a period of time, dirt will adhere to the outer wall of the conical head 5. By passing high-pressure fluid from the scraper housing 1, the high-pressure fluid will flow through the upper support plate 19 and the lower support plate 20. After the hole is sprayed from the through hole 501, the dirt on the outside of the conical head 5 is washed.

Further, as shown in FIGS. 1-4 , the servo motor 7 is fixed on the inner wall of the scraping housing 1 through the motor bracket 6 .

It should be noted that there are multiple motor brackets 6 , and the servo motor 7 is supported by the motor brackets 6 , which effectively improves the stability of the servo motor 7 .

The oilfield casing shaping device provided by the present invention drives the upper cam and the lower cam to rotate through the long rod, and at the same time drives the upper threaded sleeve and the lower threaded sleeve to move. When the upper threaded sleeve and the lower threaded sleeve are close to each other, the The rod drives the shaping block to protrude from the side wall hole of the shaping shell, the rotation of the upper cam and the lower cam drives the four scraping blocks to retract into the side wall hole of the scraping shell at the same time, and the wellhead equipment drives the shaping device to move up and down so that the shaping block is aligned The inner wall of the casing is shaped, and the roller on the shaping block rolls on the casing wall to realize the shaping operation of the downhole casing without changing the thickness of the casing wall, which can reduce the damage to the casing during the casing shaping process ; When the upper threaded sleeve and the lower threaded sleeve are far away from each other, the upper connecting rod and the lower connecting rod drive the shaping block to retract into the side wall hole of the shaping shell, and the rotation of the upper cam and the lower cam drives the four scraping blocks to stretch out for scraping at the same time The side wall hole of the shell is driven by the wellhead equipment to rotate the shaping device to make the scraping block scrape the inner wall of the casing to complete the scraping operation; by changing the rotation angle of the long rod, the shaping diameter of the shaping block can be changed, and the scraping diameter of the scraping block can be changed at the same time. The shaping device can be used to repair various casings with different diameters, which saves the operation time for repairing the downhole casing and reduces the cost of repairing the downhole casing.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be connected through the middle The media is indirectly connected, which can be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations. The orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" etc. is based on The orientation or positional relationship shown in the drawings is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as Limitations on the Invention. In the description of the present invention, "plurality" means two or more, unless otherwise specified precisely.

The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein, for example, can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (9)

1. The oil field casing pipe shaping device is characterized by comprising a scraping shell, wherein the lower end of the scraping shell is fixedly provided with a shaping shell, the lower end of the shaping shell is fixedly provided with a conical head, a scraping block is arranged on a side wall hole of the scraping shell, a shaping block is arranged on the side wall hole of the shaping shell, a servo motor is arranged at the upper end in the scraping shell, a rotating shaft of the servo motor is connected with a long rod through a coupler, the long rod sequentially comprises a polished rod section, an upper thread section, a separation section, a lower thread section and a limiting section from top to bottom, the thread pitches of the upper thread section and the lower thread section are equal and opposite in rotating direction, an upper cam and a lower cam are fixedly arranged on the polished rod section, an upper thread sleeve is arranged on the upper thread section, a lower thread sleeve is arranged on the lower thread section, the upper thread sleeve and the lower thread sleeve are respectively connected with the shaping block in a rotating manner through an upper connecting rod and a lower connecting rod, two ejector rods are symmetrically arranged on the upper cam, the ejector rods are symmetrically arranged on the upper cam, an included angle between the ejector rod arranged on the lower cam and the upper cam is 90 DEG, and the wedge-shaped guide block is fixedly connected with the scraping shell, and the wedge-shaped guide block;

the scraping block comprises a scraping block body, and a long sliding groove is formed in the inclined surface of the scraping block body; the wedge block comprises a wedge block body, a wedge block round hole is formed in the upper end face of the wedge block body, the wedge block round hole is fixedly connected with the cylindrical end portion of the vertical section of the ejector rod, a long sliding strip is arranged on the inclined face of the wedge block body, and the long sliding strip is matched with the long sliding groove.

2. The oil field casing shaping device according to claim 1, wherein the upper cam comprises an upper cam body, an upper cam central hole is formed in the center of the upper cam body, a first spiral groove and a second spiral groove are formed in the outer wall surface of the upper cam body, the first spiral groove and the second spiral groove are equal in structure and size, the lowest end of the first spiral groove is located right below the highest end of the second spiral groove, the highest end of the first spiral groove is located right above the lowest end of the second spiral groove, an included angle formed between the highest end of the first spiral groove and the highest end of the second spiral groove is 180 degrees, an included angle formed between the lowest end of the first spiral groove and the lowest end of the second spiral groove is 180 degrees, two ejector rods are symmetrically mounted on the upper cam, the two ejector rods matched with the upper cam are matched with the first spiral groove and the second spiral groove respectively, and the spiral directions of the spiral grooves on the lower cam are opposite to those of the spiral grooves on the upper cam.

3. The oilfield casing reshaping device of claim 1 or 2, wherein the scraping block body is provided with a wear resistant layer on the arc surface.

4. The oilfield casing shaping device of claim 3, wherein the guide bracket comprises a guide bracket body, a rectangular hole is formed in the center of the guide bracket body, and a support rod is fixed to the outer side wall of the guide bracket body and fixed to the inner wall of the scraping housing.

5. The oilfield casing reshaping device according to claim 1 or 2, wherein the reshaping block comprises a reshaping block body, the reshaping block body is integrally U-shaped, a roller is installed on one side of the reshaping block body, two reshaping block connecting parts are fixedly installed on the other side of the reshaping block body, and the two reshaping block connecting parts are respectively connected with the upper threaded sleeve and the lower threaded sleeve through an upper connecting rod and a lower connecting rod.

6. The oilfield casing reshaping device of claim 5, wherein the number of the reshaping blocks is four or six.

7. The oilfield casing conforming device of claim 1 wherein the long rod has an upper support plate and a lower support plate mounted thereon, the upper support plate and the lower support plate both being fixedly mounted on the inner wall of the scraping housing.

8. The oilfield casing reshaping device of claim 7, wherein the tapered head is circumferentially and evenly perforated.

9. The oilfield casing conforming device of claim 1 wherein the servo motor is secured to the inner wall of the scraped housing by a motor bracket.

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