CN210714676U - Impression tool - Google Patents

Abstract

The utility model provides an impression instrument for the operation is salvaged in well workover, including impression and connecting piece, the first end of impression is the detection face, the second end of impression be used for with the first end fixed connection of connecting piece, the second end of connecting piece is used for and sends into the tubular column and connect, the connecting piece is still including setting up the main part between the first end of connecting piece and second end, and set up the portion of rightting on the main part lateral surface, the butt is on the oil pipe inner wall when the impression instrument is located the oil pipe in the portion of rightting, so that the axis of connecting piece and oil pipe's axis are parallel. The utility model discloses a die instrument can accurately obtain fish top shape.

Description

Impression tool

Technical Field

The utility model relates to an operation equipment technical field in the pit especially relates to a die instrument.

Background

There are many types of operations in the production of oil wells, which typically require lowering a tool into a wellbore by means of wireline, slickline, coiled tubing, etc. Due to various uncontrollable factors, these tools may fall into the well. The fallen tool is called a fish, which affects normal production, so fishing the fish becomes a necessary task.

The structure of the top of the fish needs to be determined when the fish is salvaged, the soft metal impression can be placed in the shaft through the pipe column and the like to collide with the top of the fish, downward pressure is applied to the fish through the pipe column, and the structure of the top of the fish is determined by using traces left by the lower end of the metal impression, so that a reasonable salvage scheme is formulated.

However, there are some cases where the metal stamp is inclined and tilted when being lowered in the wellbore, so that the metal stamp cannot be directly opposite to the fish head, and a part of the structure of the fish head is not covered by the metal stamp, and thus the related art stamp tool has a problem that the shape of the fish head cannot be accurately obtained.

SUMMERY OF THE UTILITY MODEL

The utility model provides a die instrument can accurately obtain fish top shape.

The utility model provides an impression instrument for the operation is salvaged in well workover, including impression and connecting piece, the first end of impression is the detection face, the second end of impression be used for with the first end fixed connection of connecting piece, the second end of connecting piece is used for and sends into the tubular column and connect, the connecting piece is still including setting up the main part between the first end of connecting piece and second end, and set up the portion of rightting on the main part lateral surface, the butt is on the oil pipe inner wall when the impression instrument is located the oil pipe in the portion of rightting, so that the axis of connecting piece and oil pipe's axis are parallel.

Optionally, the righting part comprises at least three righting pieces vertically arranged on the outer side face of the main body part, the at least three righting pieces are arranged around the axis of the main body part, and when the impression tool is located in the oil pipe, the side face of the righting piece, which is away from the main body part, is attached to the inner wall of the oil pipe.

Optionally, the main body part is a revolving body, the extending direction of the righting piece is parallel to the axis of the main body part, and the heights of all the righting pieces in the radial direction of the main body part are the same.

Optionally, the outer side surface of the second end of the connecting piece is provided with an external thread.

Optionally, the first end of the connecting member has a first connecting portion, the second end of the die has a second connecting portion, and the first connecting portion and the second connecting portion are inserted and fixed with each other.

Optionally, a stop surface is provided at an end of the first connection portion near the stamp, the stop surface being adapted to abut an end surface of the second connection portion near the connection member.

Optionally, the first connection portion has a first slot facing the die opening, the second connection portion has a first insertion portion insertable into the first slot, an inner dimension of the first slot matches an outer dimension of the first insertion portion, and a slot bottom of the first slot is formed as a stop surface.

Optionally, the outer contour dimension of the first connecting portion is larger than the outer contour dimension of the main body portion of the connecting member.

Optionally, the first slot and the first insertion portion are both circular in cross-section.

Optionally, the first connecting portion has a second insertion portion, the second connecting portion has a second slot into which the second insertion portion can be inserted, the outer dimension of the second insertion portion matches with the inner dimension of the second slot, at least part of the structure on the second insertion portion protrudes outward to form an expanded diameter portion, and the end face of the expanded diameter portion facing the stamp is formed as a stop face.

The utility model provides an impression instrument for the operation is salvaged in well workover, including impression and connecting piece, the first end of impression is the detection face, the second end of impression be used for with the first end fixed connection of connecting piece, the second end of connecting piece is used for and sends into the tubular column and connect, the connecting piece is still including setting up the main part between the first end of connecting piece and second end, and set up the portion of rightting on the main part lateral surface, the butt is on the oil pipe inner wall when the impression instrument is located the oil pipe in the portion of rightting, so that the axis of connecting piece and oil pipe's axis are parallel. Through set up righting portion on the lateral surface of main part, at the process that the die is transferred along pit shaft, for example oil pipe inner wall, righting portion butt all the time on the oil pipe inner wall to make the axis of connecting piece and oil pipe's axis parallel, thereby the axis of the die of being connected with the connecting piece also can not take place the slope, is just to the fish that falls all the time, when reacing the fish top, can accurately support completely and press in the fish top, consequently can accurately obtain the fish top shape.

Drawings

Fig. 1 is a schematic structural diagram of a connecting member in an impression tool according to an embodiment of the present invention;

fig. 2 is a schematic structural view of another angle of a connecting member in an impression tool according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an impression in an impression tool according to an embodiment of the present invention;

fig. 4 is a top view of an impression in an impression tool provided by an embodiment of the present invention;

fig. 5 is a schematic perspective view of a connecting member in another impression tool according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a connecting member in another impression tool according to an embodiment of the present invention.

Description of the reference numerals

1-impression;

2-a connector;

11-a first end of the stamp;

12-a second end of the stamp;

13-a second connection;

14-a first insertion portion;

21-a first end of a connector;

22-a second end of the connector;

23-a main body portion;

24-a righting part;

25-a centralizing piece;

26-a first connection;

27. 31-a stop surface;

28-a first slot;

29-a second insertion portion;

30-diameter expansion part.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the accompanying drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

Fig. 1 is the structural schematic diagram of the connecting piece in the impression tool provided by the embodiment of the present invention, fig. 2 is the structural schematic diagram of another angle of the connecting piece in the impression tool provided by the embodiment of the present invention, fig. 3 is the structural schematic diagram of the impression in the impression tool provided by the embodiment of the present invention, fig. 4 is the top view of the impression in the impression tool provided by the embodiment of the present invention. As shown in figures 1-4, the impression tool of the embodiment is used for well repairing and fishing operations, the impression tool comprises an impression 1 and a connecting piece 2, a first end 11 of the impression is a detection end, a second end 12 of the impression is used for being fixedly connected with a first end 21 of the connecting piece, a second end 22 of the connecting piece is used for being connected with a feeding pipe column, the connecting piece 2 further comprises a main body part 23 arranged between the first end 21 and the second end 22 of the connecting piece, and a righting part 24 arranged on the outer side surface of the main body part 23, and the righting part 24 is used for being abutted against the inner wall of an oil pipe when the impression tool is positioned in the oil pipe so that the axis of the connecting piece.

The impression tool of the embodiment is used for well repairing and fishing operation and comprises an impression 1 and a connecting piece 2, wherein the impression 1 can detect the damage type, degree and falling depth of a falling fish in a well, the shape of a fish top and the falling direction, the nature of an accident can be judged according to an impression on the impression 1, and data is provided for formulating measures and selecting tools for repairing and fishing the falling fish. At present, the impression 1 is widely applied to detecting the condition of fish tops of falling objects in wells during the overhaul and measure maintenance of oil, gas fields and oil, gas and water wells in the petroleum industry. The stamp 1 may be made of soft metal such as lead, or may be made of other materials according to actual requirements, which is not limited by the present invention. In addition, one end of the stamp 1, for example the first end 11 of the stamp, may be a detection end for contacting the top of a fish. As shown in fig. 3 and 4, the stamp 1 may be in the shape of a truncated cone, and the diameter of the first end 11 of the stamp is larger than the diameter of the second end 12 of the stamp, because the second end 12 of the stamp has a smaller diameter and is easily connected to other components, such as a pipe string, etc., and the diameter of the second end 12 of the stamp is larger, so as to cover the whole top of the fish, and of course, the diameter of the first end 11 of the stamp is smaller than or approximately the same as the inner diameter of the oil pipe in the well. In addition, the stamp 1 only needs to be positioned right above the fish and substantially covers the top of the fish, and does not necessarily cover the whole range of the top of the fish, so that the stamp 1 is pressed against the top of the fish and is deformed to closely fit with the top of the fish, the approximate shape of the top of the fish can be known through the shape of the impression of the stamp 1, and accordingly, whether the fish is a steel wire, a pipe, a well dredging device or the like can be judged, and the connection mode of the fish in the well can be judged through the mark.

Further, in order to lower the stamp 1 into the wellbore, it is generally possible to carry out running of a pipe string or the like through a drill pipe, a coiled tubing or the like. In particular, a connection 2 is provided between the running string and the stamp 1 for connecting the stamp 1 to the string, more particularly, the first end 11 of the stamp is a detection end for abutting against the top end of a fish when the stamp 1 is lowered over the fish in the shaft. The second end 12 of the impression is adapted to be fixedly connected to the first end 21 of the connector and the second end 22 of the connector is adapted to be connected to the running string, so that the impression 1 can be fixed to the end of the running string by connecting the connector 2 between the running string and the impression 1.

In the process of putting the impression module in the well bore by the feeding pipe string, the situation of skew and inclination of the feeding pipe string easily occurs, so that when the impression module reaches the position of the fish, the top of the fish cannot be aligned, and part of the structure of the top of the fish is not covered by the metal impression module, so that the impression module tool in the prior art has the problem that the shape of the top of the fish cannot be accurately obtained, and the connecting piece 2 in the embodiment further comprises a main body part 23 arranged between the first end 21 and the second end 22 of the connecting piece, and a righting part 24 arranged on the outer side surface of the main body part 23, wherein the righting part 24 is used for being abutted against the inner wall of the oil pipe when the impression module tool is positioned in the oil pipe, so that the axis of the connecting piece 2 is parallel to the axis of the oil pipe, like the way, because the righting part 24 is arranged on the outer side surface of the main body part 23, and the axis of the connecting piece 2 is parallel to the axis of the oil pipe, so the axis of the die 1 connected with the connecting piece 2 can not incline and can always face the fish, and the die can accurately and completely press the top of the fish when reaching the top of the fish, thereby accurately obtaining the shape of the top of the fish. In addition, in order to ensure sufficient strength of the connector 2, the main body portion 23 needs to be of a solid structure.

Referring to the specific structure of the centering portion 24, as shown in fig. 1 and 2, the centering portion 24 includes at least three centering pieces 25 standing on the outer side surface of the main body portion 23, the at least three centering pieces 25 are arranged around the axis of the main body portion 23, and when the impression tool is located in the oil pipe, the side surface of the centering piece 25 facing away from the main body portion 23 abuts against the inner wall of the oil pipe. The righting piece 25 is vertically arranged on the outer side surface of the main body part 23, namely the righting piece 25 is vertically arranged on the outer side surface of the main body part 23 and can be supported between the outer side surface of the main body part 23 and the oil pipe. And at least three piece of righting piece 25 sets up around the axis of main part 23, and it is that piece 25 sets up around the circumference of main part 23 to right piece 25, all is equipped with righting piece 25 in 360 scopes of main part 2 like this, can support main part 23 in the circumference better, prevents that main part 23 from falling to any one direction. When the die instrument was located the oil pipe, the side and the laminating of oil pipe inner wall that deviate from main part 23 of piece 25 of rightting can guarantee like this that a plurality of pieces 25 of righting support main part 23 in oil pipe, and can not take place to rock the circumstances such as, also can guarantee simultaneously that the axis of connecting piece 2 (the axis of die 1) and the axis of oil pipe remain parallel throughout. In fig. 1, 6 centralizers are taken as an example for illustration, but in practice, other numbers of centralizers can be selected as required, but the number of centralizers should be at least three in order to support the main body 23 well over the entire circumferential extent. The material of the righting piece 25 can be steel material generally, and can also be other high-strength materials.

Referring to the specific structure of the body portion 23, the body portion 23 may be a solid of revolution, which facilitates the manufacturing process thereof. In addition, the extending direction of the righting piece 25 is parallel to the axis of the main body part 23, which means that the righting piece 25 needs to keep a certain length in the axis direction of the oil pipe so as to guide the integral structure formed by the feeding pipe column and the impression tool, and the inner wall of the oil pipe can better limit the connecting piece 2. In addition, all the centralizing pieces 25 are at the same height in the radial direction of the main body portion 23, which ensures that the main body portion 23 is centered inside the oil pipe, facilitating the downward pressure of the pipe string against the impression block 1 via the connecting member 2, both during lowering of the impression block tool and when the impression block 1 is on top of a fish. The stabilizing piece 25 may be fixed to the main body portion 23 by welding or the like, or the stabilizing piece 25 may be formed integrally with the main body portion 23.

In order to facilitate the connection of the connection piece 2 to the running string, it is possible, as shown in fig. 1, to provide an external thread on the outer side of the second end 22 of the connection piece, and correspondingly, an internal thread at the connection end of the running string, or to provide an internal thread on the outer side of the second end 22 of the connection piece, and correspondingly, an external thread at the connection end of the running string, so that the connection of the connection piece 2 to the connection end of the running string can be achieved by a threaded coupling. Of course, the present invention is not limited to this, but the connection member 2 and the feeding pipe column can be connected by a snap joint, a rivet joint, etc., and such a change is all within the protection scope of the present invention.

The connection of the connection element 2 to the end of the running string has been described above, followed by the connection of the connection element 2 to the stamp 1.

As an alternative embodiment, as shown in fig. 1, the first end 21 of the connecting member has a first connecting portion 26, the second end 12 of the stamp has a second connecting portion 13, and the first connecting portion 26 and the second connecting portion 13 are inserted and fixed to each other. The stamp 1 and the connecting element 2 can be connected by a simple fixing means of plug-in fixing, which simplifies the mounting process of the two. Of course, this plug-in attachment needs to be an interference fit to prevent the stamp 1 from falling off the connector 2 during lowering of the stamp tool or during lifting of the stamp tool up the wellbore after the stamp has been completed. Furthermore, in order to position the connecting element 2 and the stamp 1 in the axial direction of the connecting element 2, a stop surface 27 may be provided at the end of the first connecting portion 26 close to the stamp 1, which stop surface can abut against the end surface of the second connecting portion 13 close to the connecting element 2 and prevent the stamp 1 from moving upwards relative to the connecting element 2.

As for the specific structure of the first connection portion 26 and the second connection portion 13, as shown in fig. 2, the first connection portion 26 has a first insertion groove 28 opening toward the die 1, the second connection portion 13 has a first insertion portion 14 insertable into the first insertion groove 28, the inner dimension of the first insertion groove 28 matches the outer dimension of the first insertion portion 14, and the groove bottom of the first insertion groove 28 is formed as a stopper face 27. In this way, the first insertion portion 14 of the second connection portion 13 is inserted into the first insertion slot 28 of the first connection portion 26, so as to achieve the plug-in connection between the stamp 1 and the connection member 2, and in addition, the inner dimension of the first insertion slot 28 is matched with the outer dimension of the first insertion portion 14, so as to ensure that the first insertion portion 14 can be just inserted into the first insertion slot 28, but in order to ensure that the two do not fall off in the process of placing the stamp tool, the inner dimension of the first insertion slot 28 is generally required to be smaller than the outer dimension of the first insertion portion 14, so that the two are in interference fit. The groove bottom of the first insertion groove 28 is formed as a stop face that can limit the displacement of the first insertion portion 14 in the connecting portion axial direction.

Further, the outer contour dimension of the first connecting portion 26 is larger than the outer contour dimension of the main body portion 23 of the connector 2. That is, the outer contour size of the first connecting portion 26 can be set large, which can both secure the connection strength of the first connecting portion 26 and the second connecting portion 13 and facilitate the insertion of the second connecting portion 13 into the first connecting portion 26.

Furthermore, the first slot 28 and the first insert portion 14 may alternatively be circular in cross-section, which may facilitate manufacturing. Meanwhile, the inner cross-sectional shape of the well bore, such as the oil pipe, is also generally circular, so that the matching of the die tool and the oil pipe is more facilitated.

Further, fig. 5 is a schematic perspective view of a connecting member in another impression tool according to an embodiment of the present invention; fig. 6 is a schematic perspective view of a connecting member in another impression tool according to an embodiment of the present invention. As shown in fig. 5 and 6, as another alternative embodiment, the first connecting portion 26 has a second insertion portion 29, the second connecting portion 13 has a second insertion slot (not shown) into which the second insertion portion 29 can be inserted, the outer dimension of the second insertion portion 29 matches the inner dimension of the second insertion slot, at least part of the structure of the second insertion portion 29 protrudes outward to form an expanded diameter portion 30, and the end surface of the expanded diameter portion 30 facing the stamp 1 is formed as a stop surface 31.

In this way, the second insertion portion 29 of the first connection portion 26 is inserted into the second slot of the second connection portion 13, so as to achieve the plug-in connection between the stamp 1 and the connection member 2, and in addition, the inner dimension of the second slot is matched with the outer dimension of the second insertion portion 29, so that the second insertion portion 29 can be inserted into the second slot exactly, but in order to ensure that the two do not fall off in the process of placing the stamp tool, the inner dimension of the second slot is generally required to be smaller than the outer dimension of the second insertion portion 29, so that the two are in interference fit. Furthermore, at least part of the structure of the second insertion portion 29 protrudes outward to form an expanded diameter portion 30, and an end surface of the expanded diameter portion 30 facing the stamp 1 is formed as a stop surface 31, which can limit the displacement of the second insertion portion 29 in the axial direction of the stamp 1.

The working process of the stamping tool of the present embodiment is described in detail below:

first, the second end 22 of the connecting element is connected to the end of the running string by means of a threaded connection, and then the first end 21 of the connecting element and the second end 12 of the die are connected by means of a bayonet connection or the like, and the axis of the die 1 and the axis of the connecting element 2 are kept parallel, i.e. the connection process of the die tool is completed. Of course, during this process, the impression 1 is mounted on the connecting element 2 by manual operation, which is not strong enough to deform the impression 1, but much less than the pressure exerted by the running string on the impression 1 when the impression 1 is located above the fish.

Next, the impression tool is lowered into a shaft, such as an oil pipe, through a feeding pipe column and the like, in the lowering process, each righting piece 25 is supported on the inner wall of the oil pipe and can be in sliding connection with the inner wall of the oil pipe, in the lowering process of the impression tool, the connecting piece 2 always keeps the state that the axis is parallel to the axis of the inner wall of the oil pipe, so that the axis of the impression 1 also always keeps the state that the axis is parallel to the axis of the inner wall of the oil pipe, the impression 1 cannot incline or skew in the lowering process, when the impression 1 reaches the top of a fish, downward pressure is applied to the impression tool through the pipe column, at the moment, the gravity of the pipe column per se generally generates 1-2 tons of gravity, and the impression 1 can be guaranteed to be compacted on the. At this time, the soft stamp deforms correspondingly to the top of the fish, and the structure of the top of the fish is completely rubbed. The running string can now be lifted and the impression tool can be taken out of the wellbore.

Then, through the impression at the bottom of the die 1, the approximate shape of the top of the fish can be known, and accordingly, whether the fish is a steel wire, a pipe tool, a well dredging device or the like can be judged, and the connection mode of the fish in the well can be judged through the impression. In this way, the operator can also select different fishing tools and fishing methods according to the type of the fish falling, so as to perform fishing operation accordingly.

In addition, the technical scheme can be used for ordinary wells, directional wells and horizontal wells, and is safe and reliable.

In this embodiment, the die instrument is used for workover salvage operation, including die and connecting piece, the first end of die is the detection face, the second end of die is used for the first end fixed connection with the connecting piece, the second end of connecting piece is used for being connected with the tubular column of sending into, the connecting piece still includes the main part that sets up between the first end of connecting piece and second end to and set up the portion of rightting on the main part lateral surface, the portion of rightting is used for when the die instrument is located the oil pipe butt on the oil pipe inner wall, so that the axis of connecting piece and the axis of oil pipe are parallel. Through set up righting portion on the lateral surface of main part, at the process that the die is transferred along pit shaft, for example oil pipe inner wall, righting portion butt all the time on the oil pipe inner wall to make the axis of connecting piece and oil pipe's axis parallel, thereby the axis of the die of being connected with the connecting piece also can not take place the slope, is just to the fish that falls all the time, when reacing the fish top, can accurately support completely and press in the fish top, consequently can accurately obtain the fish top shape.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

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

Claims (10)

1. The utility model provides an impression instrument for workover salvage operation, a serial communication port, including impression and connecting piece, the first end of impression is the detection face, the second end of impression be used for with the first end fixed connection of connecting piece, the second end of connecting piece is used for and sends into the tubular column and connect, the connecting piece is still including setting up the first end of connecting piece with main part between the second end of connecting piece, and set up and be in righting portion on the main part lateral surface, righting portion is used for the butt on the oil pipe inner wall when impression instrument is located the oil pipe, so that the axis of connecting piece with the axis of oil pipe is parallel.

2. The impression tool of claim 1, wherein the centralizing section comprises at least three centralizing pieces erected on the outer side surface of the main body section, the at least three centralizing pieces are arranged around the axis of the main body section, and when the impression tool is positioned in the oil pipe, the side surface of the centralizing piece facing away from the main body section is attached to the inner wall of the oil pipe.

3. The impression tool of claim 2, wherein the body portion is a solid of revolution, the direction of extension of the centralizing piece is parallel to the axis of the body portion, and the heights of all the centralizing pieces in the radial direction of the body portion are the same.

4. The impression tool of claim 1, wherein the outer side of the second end of the connecting member is provided with an external thread.

5. Impression tool according to any of claims 1 to 4, wherein a first end of the connecting member has a first connection portion and a second end of the impression has a second connection portion, the first and second connection portions being plug-in fixed to each other.

6. Impression tool according to claim 5, wherein a stop surface is provided at an end of the first connection part near the impression for abutment with an end surface of the second connection part near the connection part.

7. The stamp tool according to claim 6, wherein the first connection portion has a first insertion slot opening towards the stamp, the second connection portion has a first insertion portion insertable into the first insertion slot, an inner dimension of the first insertion slot and an outer dimension of the first insertion portion match, a slot bottom of the first insertion slot being formed as the stop face.

8. The impression tool of claim 7, wherein an outer profile dimension of the first connection portion is larger than an outer profile dimension of the main body portion of the connection member.

9. The stamp tool of claim 7, wherein the first slot and the first insert portion are both circular in cross-section.

10. The stamp tool according to claim 6, wherein the first connecting portion has a second insertion portion having a second insertion groove into which the second insertion portion is inserted, an outer dimension of the second insertion portion matches an inner dimension of the second insertion groove, at least a part of the second insertion portion is formed to protrude outward to form an enlarged diameter portion, and an end surface of the enlarged diameter portion facing the stamp is formed as the stopper surface.

Images