CN205445527U - Fishing joint - Google Patents
Fishing joint Download PDFInfo
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- CN205445527U CN205445527U CN201620123561.5U CN201620123561U CN205445527U CN 205445527 U CN205445527 U CN 205445527U CN 201620123561 U CN201620123561 U CN 201620123561U CN 205445527 U CN205445527 U CN 205445527U
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- milling shoe
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- fishing joint
- milling
- clamping part
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Abstract
The utility model provides a fishing joint, including the cylinder body, the cylinder body has first terminal surface and second terminal surface, this internal radial cross section that is equipped with of cylinder is the circular shape cavity, and the cavity is equipped with round opening on first terminal surface, and the radial cross section area of cylinder body reduces on the orientation of first terminal surface to the second terminal surface gradually, be equipped with the thread making screw thread on the cavity inner wall, being equipped with connecting portion on the second terminal surface, being equipped with milling shoe portion on the first terminal surface, milling shoe portion includes to keeping away from the bellied milling shoe tooth of a face direction. Through rotatable parts with in going into the pit shaft under the fishing joint, the joint portion by card parts of milling shoe portion in to the pit shaft overlap and mills, stretched into the cavity by the card parts simultaneously in, the thread making screw makes and is connected with the cavity by the card parts being carried out the thread making by the card parts, after the mill off overlaps in milling shoe inferior officer joint portion, just can block parts with fishing joint and quilt and take the oil well together out of, just can practice thrift the salvage time with being pulled out by calorie parts through a borehole operation, has improved salvage efficiency.
Description
Technical field
This utility model relates to technical field of petroleum extraction, particularly relates to a kind of fishing joint.
Background technology
During oil exploitation, due to the life-time service of oil well pit shaft, oil well pit shaft there will be leak source, so water in rock stratum will enter oil well pit shaft from leak source, will be adulterated in oil subsoil water, makes the content of oil decline, reduces the production efficiency of oil.
In order to improve the quality of oil, need these leak sources are blocked, concrete closure way is: use packer or machine bridge etc. by clamping part, this is provided with Access Division by the lateral wall of clamping part, clamping sealing is carried out by the inwall of this Access Division Yu oil well pit shaft, make oil well pit shaft insulate, and then again leak source is blocked.But after closure terminates, it is necessary to the packer fallen in oil well pit shaft or machine bridge etc. are salvaged by clamping part.
Prior art is salvaged: first, is extend in the pit shaft of oil well by milling shoe set by the way of string pipe, by being used for the Access Division set mill off that clamping is sealed on oil well pit shaft on clamping part, then by milling shoe set pull-out oil well pit shaft.It extend into salvaging thread making device in the pit shaft of oil well by the way of string pipe again, salvaging thread making device is made to be inserted into by the position of clamping part, carry out thread making by extruding, make salvaging thread making device be connected by clamping part with this, with the pit shaft by being taken out of oil well by clamping part.
Although said method can will be salvaged out by clamping part, however it is necessary that under least twice, well operations can will be salvaged from oil well pit shaft by clamping part, so causes salvaging time length, salvages inefficient problem.
Utility model content
This utility model provides a kind of fishing joint, to realize by once descending well operations just can will be salvaged out by clamping part, thus reduces the salvaging time, improves and salvage efficiency.
A kind of fishing joint that this utility model provides, including cylindrical body, described cylindrical body has the first end face and the second end face；
Being provided with radial section in described cylindrical body is circular cavity, and described cavity is provided with circular open, so that described first end face is formed as annular end face on described first end face；
The radial section area of described cylindrical body is gradually reduced to the direction of described second end face from described first end face；The inwall of described cavity is provided with thread making screw thread；
Described second end face is provided with the connecting portion for connecting rotatable parts, and described first end face is provided with milling shoe portion, and described milling shoe portion includes to the milling shoe tooth protruding away from described first end face direction.
Fishing joint as above, described cavity is with the central shaft of described cylindrical body for axis of symmetry centrosymmetry；
The milling width that bores of described milling shoe tooth is more than or equal to the radial width of described annular end face.
Fishing joint as above, described milling shoe portion also includes: milling shoe sleeve；
Described milling shoe sleeve is coaxially disposed with described cylindrical body；
First end of described milling shoe sleeve is connected with described first end face, and the second end of described milling shoe sleeve is provided with described milling shoe tooth.
Fishing joint as above, the external diameter of described milling shoe sleeve is identical with the external diameter of described cylindrical body；
The milling width that bores of described milling shoe tooth is more than or equal to the wall thickness of described milling shoe sleeve.
Fishing joint as above, the internal diameter of described milling shoe sleeve is more than the diameter of described circular open.
Fishing joint as above, the internal diameter of described milling shoe sleeve is 2～3mm with the difference of the diameter of described circular open.
Fishing joint as above, the second end of described milling shoe sleeve is provided with chamfering near the side of described cavity.
Fishing joint as above, the outer wall of described milling shoe sleeve is smooth surface.
Fishing joint as above, the tangential direction that land direction is described cylindrical body of described milling shoe tooth.
Fishing joint as above, described milling shoe portion is embedded on the first end face of described cylindrical body；
Or, described milling shoe portion is welded on the first end face of described cylindrical body.
Fishing joint of the present utility model, is mainly used in falling into being salvaged by clamping part in oil well pit shaft.This fishing joint includes cylindrical body, first end face of cylindrical body is provided with milling shoe portion, second end face is provided with the connecting portion for connecting rotatable parts, being provided with radial section in cylindrical body is circular cavity, cavity is provided with circular open on the first end face of cylindrical body, and cavity inner wall is provided with thread making screw thread.It is connected on rotatable parts by the portion of connecting, by in this fishing joint lower going-into-well cylinder, being carried out by the Access Division of clamping part in pit shaft can be overlapped milling by milling shoe portion, it is extend in the cavity of cylindrical body by clamping part simultaneously, thread making is carried out to by clamping part by thread making screw thread, make to be connected screw thread by clamping part with the contact portion generation of thread making screw thread, threaded with mating of thread making screw thread by this connection screw thread, thus will be linked together with cavity by clamping part, so after mill off will be overlapped by the Access Division of clamping part in milling shoe portion, just can pull out fishing joint will be by clamping part band producing well, thus just can will be salvaged oil well pit shaft by clamping part by a underground work, save the salvaging time, improve salvaging efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structure sectional view of the fishing joint that Fig. 1 provides for this utility model embodiment one；
The structure sectional view of the fishing joint that Fig. 2 provides for this utility model embodiment two.
Description of reference numerals:
1, cylindrical body；
11, the first end face；
12, the second end face；
2, cavity；
3, thread making screw thread；
4, connecting portion；
5, milling shoe portion；
51, milling shoe tooth；
52, milling shoe sleeve；
521, the first end of milling shoe sleeve；
522, the second end of milling shoe sleeve.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
During oil exploitation, along with the life-time service of oil well pit shaft, oil well pit shaft there will be leak source, so water in rock stratum will enter oil well pit shaft from leak source, so will adulterate in oil subsoil water, makes the content of oil decline, reduces the production efficiency of oil.
In order to improve the quality of oil; therefore; it is accomplished by these leak sources are blocked; in existing leak source blocking technology; often use packer or machine bridge etc. by clamping part; by being carried out clamping sealing by the inwall of the Access Division on clamping part lateral wall Yu oil well pit shaft, make oil well pit shaft insulate, and then again leak source is blocked.But after closure terminates, it is necessary to the packer fallen in oil well pit shaft or machine bridge etc. are salvaged by clamping part.
The method salvaged by clamping part fallen in pit shaft is by prior art: extend in the pit shaft of oil well by milling shoe set by the way of string pipe, i.e., two or many endowels are connected in series, milling shoe set is connected to the bottom of tubing string, by tubing string by the pit shaft of milling shoe set feeding oil well.Utilize milling shoe set will to be used for the Access Division set mill off that clamping is sealed on oil well pit shaft on clamping part, then by milling shoe set pull-out oil well pit shaft, by the way of string pipe, salvaging thread making device is extend in oil well pit shaft again, it is inserted into by the position of clamping part, thread making is carried out to by clamping part by extruding, make salvaging thread making device be connected with by clamping part, and will be taken out of oil well pit shaft by clamping part.
Although the method for prior art can will be salvaged out by clamping part, however it is necessary that under least twice, well operations can will be salvaged from oil well pit shaft by clamping part, so causes salvaging time length, salvages inefficient problem.
In order to solve above-mentioned technical problem, this utility model provides a kind of fishing joint, and this fishing joint is mainly used in falling into being salvaged by clamping part in oil well pit shaft, to realize by once descending well operations just can will be salvaged out by clamping part, thus reduce the salvaging time, improve and salvage efficiency.
Below by way of specific embodiment, the 26S Proteasome Structure and Function of this fishing joint is described in detail.
Embodiment one:
The structure sectional view of the fishing joint that Fig. 1 provides for this utility model embodiment one.Referring to the drawings shown in 1, the fishing joint that the present embodiment provides, including cylindrical body 1, cylindrical body 1 has the first end face 11 and the second end face 12.Being provided with radial section in cylindrical body 1 is circular cavity 2, and the most preferably, cavity 2 is with the central shaft of cylindrical body 1 for axis of symmetry centrosymmetry.
Cavity 2 is provided with circular open on the first end face 11, say, that this circular open makes the first end face 11 of cylindrical body 1 be formed as annular end face.The radial section area of cylindrical body 1 is gradually reduced to the direction of the second end face 12 from the first end face 11.The inwall of cavity 2 is provided with thread making screw thread 3.
First end face 11 of cylindrical body 1 is provided with milling shoe portion 5, and milling shoe portion 5 includes to the milling shoe tooth 51 protruding away from the first end face 11 direction.The milling width that bores of milling shoe tooth 51 is more than or equal to the radial width of annular end face.
Second end face 12 of cylindrical body is provided with connecting portion 4, and this connecting portion 4 is used for connecting rotatable parts, and these rotatable parts can be string pipe.In use, according to by clamping part depth profile in pit shaft, be serially connected up and down formation string pipe by many endowels, connecting portion 4 in fishing joint is connected to the bottom of bottom tubing string, by this string pipe, fishing joint is sent in pit shaft, rotate string to manage so that fishing joint is to close by clamping part, thus carry out boring milling to by clamping part.
The fishing joint of the present embodiment is illustrated below by way of the process implemented and principle:
The fishing joint that the present embodiment provides, first pass through string pipe mode fishing joint is extend in oil well pit shaft by clamping part, the detailed description of the invention of string pipe is: the connecting portion 4 of fishing joint is connected to one end of the first endowel, by the first endowel, fishing joint is extend in oil well pit shaft, it is connected with the other end of the first endowel with one end of the second endowel again, then continue to also extend in oil well pit shaft the second endowel, by that analogy, connected by many endowels head and the tail, fishing joint can be extend in oil well pit shaft always by clamping part.At this it should be noted that the particular number forming the tubing string of string pipe can be according to being positioned at the degree of depth of oil well pit shaft by clamping part depending on.
Then, by rotating tubing string, thus fishing joint is driven to rotate, fishing joint is made to move down along oil well pit shaft, when the milling shoe tooth 51 of fishing joint touches the Access Division by clamping part, the milling shoe tooth 51 in fishing joint starts rotation of pressurizeing downwards, overlaps the above-mentioned Access Division of milling.Constantly overlap milling along with fishing joint, this fishing joint the most constantly moves down, and owing to being connected on the inwall of oil well pit shaft by Access Division by clamping part, as long as so Access Division being overlapped mill off, just can be disconnected with oil well pit shaft by clamping part.
During fishing joint set milling is by clamping part, along with fishing joint moves down, it is extend in the cavity 2 of fishing joint by clamping part part, when being touched the thread making screw thread 3 in cavity 2 by clamping part, thread making screw thread 3 in cavity 2 pressurizes downwards rotation, carry out extruding thread making to by clamping part, i.e. by the extruding thread making of thread making screw thread, make to be connected screw thread by clamping part with the contact portion generation of thread making screw thread 3, can be threadeded with thread making screw thread 3 by this connection screw thread, and then fishing joint is connected with by clamping part.
Finally, when fishing joint is by being overlapped mill off by the Access Division of clamping part, makes to be disconnected with oil well pit shaft by clamping part, now, be connected on cavity 2 by clamping part, now in oil well pit shaft, extracted fishing joint, will have been taken out of in the lump by clamping part.
The fishing joint that the present embodiment provides, is mainly used in falling into being salvaged by clamping part in oil well pit shaft.nullBy being provided with the cavity of thread making screw thread in the cylindrical body of fishing joint，First end face of cylindrical body arranges milling shoe portion，Second end face of cylindrical body arranges connecting portion，By making fishing joint constantly move down，Milling shoe portion can carry out overlapping milling to by the Access Division of clamping part，It is extend in the cavity of cylindrical body by clamping part simultaneously，Thread making can be carried out to by clamping part by thread making screw thread，Make to be connected screw thread by clamping part with the contact portion generation of thread making screw thread，It is connected with the coupling of thread making screw thread by this connection screw thread，To be linked together with fishing joint by clamping part，So after mill off will be overlapped by the Access Division of clamping part in milling shoe portion，Just can pull-out fishing joint while will be by clamping part in the lump band producing well，Thus just can will be salvaged oil well pit shaft by clamping part by a underground work，Save the salvaging time，Improve salvaging efficiency.
In the present embodiment, milling shoe portion 5 is embedded on the first end face 11, i.e. be embedded on the first end face 11 of cylindrical body 1 in milling shoe portion 5 by mosaic technology.So can increase the comprcssive strength of fishing joint, and can ensure that milling shoe portion 5 is less likely to occur to come off during set milling.
In other embodiments, it is also possible to be welded in milling shoe portion 5 on first end face 11, wherein, welding manner can select spot welding, so can ensure that milling shoe portion 5 and the bonding strength of the first end face 11.
Certainly, milling shoe portion 5 can also be connected with the first end face 11 of cylindrical body 1 by other connected modes, and such as riveting, clamping etc., this utility model is not limited thereto.
Due to fishing joint set milling during, milling shoe portion 5 need to by clamping part carry out bore milling cut, in order to ensure the set milling intensity in milling shoe portion 5, in this utility model embodiment propose fishing joint, its milling shoe portion can use alloy material to make.More preferred, this alloy material can select Hardmetal materials, so can ensure that the milling shoe portion 5 intensity during set milling.
Further, in order to fishing joint can be made in hgher efficiency by the set milling of clamping part, the tangential direction that land direction is cylindrical body 1 of the milling shoe tooth 51 in the present embodiment, so fishing joint is in rotation process, the land of milling shoe tooth 51 carries out cutting set milling along the tangential direction of cylindrical body 1, and set milling is in hgher efficiency.
Embodiment two:
In actual application, owing to being to be connected on the inwall of oil well pit shaft by Access Division by clamping part, Access Division is generally located on by the centre position on clamping part vertical direction, and an annular space between the inwall by clamping part and oil well pit shaft more than Access Division, can be there is, so during fishing joint moves down, milling shoe tooth 51 can enter above-mentioned annular space and move to by the Access Division of clamping part, and now, had been introduced in the cavity 2 of fishing joint by the top of clamping part.When milling shoe tooth 51 also will not hit on Access Division, thread making screw thread 3 is it is possible to can come into contact with by the top of clamping part, and carries out thread making to by clamping part, so will result in thread making screw thread 3 by the thread making on clamping part apart from long, affect the work efficiency of milling shoe tooth 51, strengthen set milling difficulty.
Therefore, in order to solve the problems referred to above, the present embodiment provides the fishing joint of another kind of structure.The structure sectional view of the fishing joint that Fig. 2 provides for this utility model embodiment two.Referring to the drawings shown in 2, the fishing joint that the present embodiment provides is with the difference of the fishing joint of embodiment one: milling shoe portion 5 also includes: milling shoe sleeve 52.
Specifically, by arranging milling shoe sleeve 52, being connected on the first end face 11 by the first end 521 of milling shoe sleeve, milling shoe tooth 51 is arranged on the second end 522 of milling shoe sleeve, and the structure of milling shoe tooth is identical with the structure of the milling shoe tooth in embodiment one.
The central shaft of milling shoe sleeve 52 is same central shaft with the central shaft of cylindrical body 1, and the outer diameter of milling shoe sleeve 52 is identical with the outer diameter of cylindrical body 1.The milling width that bores of milling shoe tooth 51 is more than or equal to the wall thickness width of milling shoe sleeve 52.
So, owing to milling shoe sleeve 52 self has one section of height, the concrete size of this height according to the Access Division by clamping part and can be designed by the vertical distance between clamping part top, and the length making milling shoe sleeve 52 can be more than or equal to by the length between the top of clamping part to Access Division.Such as: the length ratio of milling shoe sleeve 52 is by the distance between the top of clamping part to the stuck point of Access Division 10 centimetres.
Setting by milling shoe sleeve 52, can be during fishing joint moves down, when milling shoe tooth 51 cross continued to move down by the top of clamping part time, will be extend in milling shoe sleeve 52 by clamping part, can't enter directly in the cavity 2 of fishing joint, and then would not be to by clamping part thread making, so when milling shoe tooth 51 touches the Access Division by clamping part, can make by the top of clamping part also in the cavity 2 of fishing joint, carry out thread making to by clamping part simultaneously, thus avoid thread making apart from long, affect the work efficiency of milling shoe tooth, the problem strengthening set milling difficulty.
In actual application, the rotation rotating drive fishing joint of tubing string, but owing to the length of tubing string the most all can be the longest, typically can reach a few km, so tubing string will shake in rotation process, and then fishing joint also can shake in rotation process, so fishing joint is after set milling, will be less than the internal diameter of milling shoe sleeve by the external diameter of clamping part, in the most often there is being stretched into by clamping part the cavity of cylindrical body very deep after thread making screw thread can be made to contact with by clamping part and carry out thread making connection, thus can affect by the salvaging efficiency of clamping part.
In order to solve this problem, further, the inner diameter of the milling shoe sleeve 52 of the present embodiment is more than the cavity 2 circular open diameter on the first end face 11.The most preferred, the inner diameter of milling shoe sleeve 52 is 2 to 3 millimeters with the difference of the circular open diameter of cavity 2, so make the above-mentioned cavity 2 opening diameter on the first end face 11 inner diameter less than milling shoe sleeve 52, contact with thread making screw thread 3 soon after can making to be stretched into cavity 2 by clamping part and carry out thread making connection, improve salvaging efficiency.
In order to fishing joint can be made when starting to overlap milling by clamping part, it is possible to make to be extend into easily in the inner chamber of milling shoe sleeve pipe 52 by clamping part, in the present embodiment, milling shoe sleeve 52 second end 522 can be provided with chamfering near the side in cylindrical body 1 axle center.So when fishing joint starts to overlap milling by clamping part, can be entered into along this chamfering easily by clamping part in the inner chamber of milling shoe sleeve pipe 52, it is to avoid latch phenomenon occurs.
During the set milling of fishing joint, when fishing joint set milling is by the Access Division of clamping part, the outer wall of milling shoe sleeve pipe 52 can be with the contact internal walls of oil well pit shaft during set milling, in order to avoid the inwall of oil well pit shaft is caused damage during set milling by fishing joint, in the present embodiment, the outer wall of milling shoe sleeve 52 is smooth surface, so milling shoe sleeve pipe 52 is during set milling, the inwall of oil well pit shaft thus will will not be caused damage with the contact internal walls of oil well pit shaft by the smooth surface of milling shoe sleeve pipe 52 outer wall.
Other technologies feature is identical with embodiment one, and can reach identical technique effect.
The fishing joint provided the present embodiment below by specifically used method is further described:
Step a, fishing joint is extend in oil well pit shaft by clamping part；
Specifically, by string pipe by the way of fishing joint is extend in oil well pit shaft by clamping part at, the detailed description of the invention of string pipe is: the attachment structure 4 of fishing joint is connected to one end of the first endowel, by the first endowel, fishing joint is extend in oil well pit shaft, it is connected with the other end of the first endowel with one end of the second endowel again, then continue to also extend in oil well pit shaft the second endowel, by that analogy, by many endowels head and the tail connect, fishing joint can be extend in oil well pit shaft always by clamping part.
Step b, rotating fishing joint, make fishing joint move down along oil well pit shaft, when the milling shoe toe joint of fishing joint contacts by Access Division on clamping part, under the milling shoe teeth directional in fishing joint, pressurization rotates, and overlaps milling Access Division；
Constantly overlap milling along with fishing joint, this fishing joint the most constantly moves down, and owing to this is connected on the inwall of oil well pit shaft by Access Division by clamping part, as long as so Access Division being overlapped mill off, just can be disconnected with oil well pit shaft by clamping part.
Step c, milling shoe portion set milling by the Access Division of clamping part during, along with fishing joint constantly moves down, it is extend in the cavity 2 of fishing joint by clamping part part, when being touched the thread making screw thread 3 in cavity by clamping part, thread making screw thread 3 in cavity pressurizes downwards rotation, start to carry out extruding thread making to by clamping part, i.e. by the extruding thread making of thread making screw thread 3, make to be connected screw thread by clamping part with the contact portion generation of thread making screw thread 3, can be threadeded with thread making screw thread 3 by this connection screw thread, and then fishing joint is connected with by clamping part.Existence due to milling shoe sleeve so that before milling shoe tooth also will not hit on Access Division, thread making screw thread will not carry out thread making to by clamping part, thus ensure that the work efficiency of milling shoe tooth.
Step d, when fishing joint will by clamping part Access Division overlap mill off, after making to be disconnected with oil well pit shaft by clamping part, in oil well pit shaft, extract fishing joint, owing to being now connected with cavity by clamping part, be carried in pit shaft together along with fishing joint by clamping part.
Thus just can will be salvaged oil well pit shaft by clamping part by a underground work, it is greatly saved the salvaging time, improves salvaging efficiency.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, it is not intended to limit；Although this utility model being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of this utility model each embodiment technical scheme.
Claims (10)
1. a fishing joint, it is characterised in that include that cylindrical body, described cylindrical body have the first end face and the second end face；
Being provided with radial section in described cylindrical body is circular cavity, and described cavity is provided with circular open, so that described first end face is formed as annular end face on described first end face；
The radial section area of described cylindrical body is gradually reduced to the direction of described second end face from described first end face；The inwall of described cavity is provided with thread making screw thread；
Described second end face is provided with the connecting portion for connecting rotatable parts, and described first end face is provided with milling shoe portion, and described milling shoe portion includes to the milling shoe tooth protruding away from described first end face direction.
Fishing joint the most according to claim 1, it is characterised in that described cavity is with the central shaft of described cylindrical body for axis of symmetry centrosymmetry；
The milling width that bores of described milling shoe tooth is more than or equal to the radial width of described annular end face.
Fishing joint the most according to claim 2, it is characterised in that described milling shoe portion, also includes: milling shoe sleeve；
Described milling shoe sleeve is coaxially disposed with described cylindrical body；
First end of described milling shoe sleeve is connected with described first end face, and the second end of described milling shoe sleeve is provided with described milling shoe tooth.
Fishing joint the most according to claim 3, it is characterised in that the external diameter of described milling shoe sleeve is identical with the external diameter of described cylindrical body；
The milling width that bores of described milling shoe tooth is more than or equal to the wall thickness of described milling shoe sleeve.
Fishing joint the most according to claim 3, it is characterised in that the internal diameter of described milling shoe sleeve is more than the diameter of described circular open.
Fishing joint the most according to claim 5, it is characterised in that the internal diameter of described milling shoe sleeve is 2～3mm with the difference of the diameter of described circular open.
7. according to the fishing joint described in any one of claim 3 to 6, it is characterised in that the second end of described milling shoe sleeve is provided with chamfering near the side of described cavity.
8. according to the fishing joint described in any one of claim 3 to 6, it is characterised in that the outer wall of described milling shoe sleeve is smooth surface.
9. according to the fishing joint described in any one of claim 1 to 6, it is characterised in that the tangential direction that land direction is described cylindrical body of described milling shoe tooth.
10. according to the fishing joint described in any one of claim 1 to 6, it is characterised in that described milling shoe portion is embedded on the first end face of described cylindrical body；
Or, described milling shoe portion is welded on the first end face of described cylindrical body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620123561.5U CN205445527U (en) | 2016-02-17 | 2016-02-17 | Fishing joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620123561.5U CN205445527U (en) | 2016-02-17 | 2016-02-17 | Fishing joint |
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| CN205445527U true CN205445527U (en) | 2016-08-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869849A (en) * | 2017-02-21 | 2017-06-20 | 中国石油集团渤海钻探工程有限公司 | Set milling fishing integrated tool and its fishing method |
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2016
- 2016-02-17 CN CN201620123561.5U patent/CN205445527U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869849A (en) * | 2017-02-21 | 2017-06-20 | 中国石油集团渤海钻探工程有限公司 | Set milling fishing integrated tool and its fishing method |
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