CN202280432U - Double-step threaded buckle used for connecting drilling well drilling rod - Google Patents
Double-step threaded buckle used for connecting drilling well drilling rod Download PDFInfo
- Publication number
- CN202280432U CN202280432U CN2011204366146U CN201120436614U CN202280432U CN 202280432 U CN202280432 U CN 202280432U CN 2011204366146 U CN2011204366146 U CN 2011204366146U CN 201120436614 U CN201120436614 U CN 201120436614U CN 202280432 U CN202280432 U CN 202280432U
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- thread
- step face
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Abstract
The utility model relates to the threaded buckle field, and discloses a double-step threaded buckle used for connecting a drilling well drilling rod. The double-step threaded buckle comprises a cylindrical-shaped pin part and an annular-shaped sleeve part. A front end of the pin part is provided with a male thread, and an inner wall of the sleeve part is provided with a female thread, besides, the pin part and the sleeve part are in a threaded connection. The utility model is characterized in that a first step surface and a second step surface are sequentially disposed on the pin part; the first step surface is disposed between the second step surface and the male thread; an inner wall of the connection end of the sleeve part and the pin part is sequentially provided with a first shoulder and a second shoulder; the first shoulder is disposed between the second shoulder and the female thread; the first shoulder is cooperated with the first step surface, and the second shoulder is cooperated with the second step surface. The utility model is advantageous in that multiple seal can be realized, higher intensity and torque can be born, the requirements of drilling deep wells and wells having high difficulties can be completely satisfied, and at the same time, the service lifetime of the drilling rod can be prolonged.
Description
Technical field
The utility model relates to the screw buckle field, relates in particular to a kind of double step screw buckle that is used to connect drilling well drilling bar.
Background technology
Along with the development of petroleum industry, the quality requirement of high-tech, high-quality downhole tool drilling rod is progressively improved, high moment of torsion high strength screw buckle is one of drilling tool method of reaching the drilling well instructions for use in drilling process.Previous screw buckle is common API standard series screw buckle, can not satisfy under the complicated geological state and the use of deep-sea well.The screw buckle of above-mentioned standard all has very big shortcoming usually, and sealing performance is bad, and common screw buckle is easy to generate the thread gluing phenomenon after each other bonding especially, and their mechanical performance all can not satisfy the needs of deep-sea well and highly difficult drilling well completely simultaneously.
The drilling well drilling bar screw buckle needs high-precision lathe and good impact-resistant blade of red hardness and high-intensity cutter in process of production.So change the helicitic texture form of joint, improve the impact resistance of joint, increase the anti-wear performance of joint; Prolong the application life of drilling tool; Make it satisfy the needs of deep-sea well and highly difficult drilling well fully, practiced thrift iron ore, the iron and steel equal energy source just becomes a current important subject.
The utility model content
In order to solve the problem of above-mentioned existence, it is a kind of simple in structure, favorable sealing property that the purpose of the utility model is to provide, and can satisfy the double step screw buckle that the drilling well drilling bar of deep-sea well and highly difficult drilling well needs is used.
To achieve these goals, the utility model adopts following technical scheme:
A kind of double step screw buckle that is used to connect drilling well drilling bar; It comprises the pin parts of cylindricality and the cover parts of ring-type, and the front end of said pin parts is provided with pin thread, and the inwall of said cover parts is provided with negative thread; Between said pin parts and the said cover parts through being threaded; It is characterized in that be provided with first step face and second step face on the said pin parts successively, said first step face is between second step face and pin thread; The end inwall that said cover parts are connected with the pin parts is provided with first shoulder and second shoulder successively; First shoulder is between second shoulder and negative thread, and said first shoulder and first step face match, and said second shoulder and second step face match.
Preferably, the said pin parts external diameter that is provided with the front end of pin thread diminishes towards cover parts direction gradually.
Preferably, the said cover parts internal diameter that is provided with the part of negative thread becomes big gradually towards pin parts direction.
Preferably, the tapering of said pin thread and negative thread is 1: 10, and angle is 60 degree.
Preferably, the initial tooth portion of said pin thread and negative thread is provided with big chamfering.
Preferably, be provided with stress relief grooves between said first step face and the second step face.
The utility model has the advantages that: through adopting the unique design of double step, make first step face and second step face coincide each other with first shoulder and second shoulder respectively, can realize sealing; Spinning each other of pin thread and negative thread also can realize sealing, and the pin ends also can be realized sealing with the inner of cover parts, and multi-sealed design makes that the sealing performance of the utility model is better; Simultaneously such design can be so that the utility model be born bigger moment of torsion and bigger intensity, and the mechanical performance of the utility model is better; Drilling well drilling bar with the utility model connection; Mechanical property is very good, can satisfy the needs of deep-sea well and highly difficult drilling well fully, has also increased greatly its application life simultaneously; The increase of drilling life of drill pipe just can reduce the use of a large amount of iron and steel resources.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of pin parts;
Fig. 3 is the structural representation of cover parts.
Label is among the figure:
1, pin parts, 101, pin thread, 102, the first step face, 103, the second step face, 104, stress relief grooves, 2, the cover parts, 201, negative thread, 202, first shoulder, 203, second shoulder.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to describe in detail explanation.
Shown in Fig. 1-3, a kind ofly be used to connect the double step screw buckle that drilling well drilling bar is used, it comprises the pin parts 1 of cylindricality and cover parts 2 two parts of ring-type; Front end at the pin parts is provided with pin thread 101, and the inwall of cover parts is provided with negative thread 201, sells parts and overlaps between the parts through being threaded; The external diameter that the pin parts are provided with the front end of pin thread diminishes towards cover parts direction gradually, and the internal diameter that the cover parts are provided with the part of negative thread becomes greatly towards pin parts direction gradually, and the cover parts are set on the pin parts; And spin through screw thread, on the pin parts, being provided with first step face 102 and second step face 103 successively, said first step face 102 is between said second step face 103 and said pin thread; Be provided with first shoulder 202 and second shoulder, 203, the first shoulders successively between second shoulder and negative thread at the end inwall that is connected with the pin parts of cover parts, wherein first shoulder and first step face are identical each other and seal; Second shoulder and second step face coincide and sealing each other; Add the sealing that coincide and produce each other between the screw thread simultaneously, sell ends in addition and also can realize sealing, so just can form multi-sealed simultaneously with the inner of cover parts; Product hermeticity can be more good; Can effectively reduce the pressure release loss, simultaneously in the middle of the process of constantly screwing, because first shoulder can have a supporting role to the first step face; Second shoulder can have a supporting role to the second step face; Through two supporting roles, the screw buckle of double step design just can be born bigger intensity and moment of torsion, and the drilling well drilling bar that uses the utility model to connect so just can satisfy the drilling well needs of deep-sea well and highly difficult well completely.
The pin thread of the utility model and the tapering of negative thread are 1: 10, and angle is 60 degree.Simultaneously the initial tooth portion of pin thread and negative thread is provided with big chamfering; Design can prevent high pulling torque like this, can prevent the generation of thread gluing effect simultaneously, between first step face and second step face, is provided with a stress relief grooves 104; The internal stress that produces when being used to discharge drilling well; Reduce concentrating of stress, thereby can effectively protect drilling rod, prolong the application life of drilling rod.
Outer wall at the double step screw buckle adopts the case hardening strengthening treatment process, makes it more wear-resisting, and the relevant parameter of the utility model can reach: hardness 31-34HRC; Tensile strength 990-1120Mpa; Yield strength 890-995Mpa; Elongation per unit length >=16%; Ballistic work negative 20 is about 110 joules when spending; Grain size is greater than 9 grades; The field trash sum is less than 21/2 grade.
The above only is the preferred implementation of the utility model; Should be pointed out that to those skilled in the art, under the prerequisite that does not break away from the utility model creation design; Can also make some similar distortion and improvement, these also should be regarded as within the protection domain of the utility model.
Claims (6)
1. double step screw buckle that is used to connect drilling well drilling bar; It comprises the pin parts of cylindricality and the cover parts of ring-type, and the front end of said pin parts is provided with pin thread, and the inwall of said cover parts is provided with negative thread; Between said pin parts and the said cover parts through being threaded; It is characterized in that be provided with first step face and second step face on the said pin parts successively, said first step face is between second step face and said pin thread; The end inwall that said cover parts are connected with said pin parts is provided with first shoulder and second shoulder successively; First shoulder is between second shoulder and negative thread, and said first shoulder and first step face match, and said second shoulder and second step face match.
2. a kind of double step screw buckle that is used to connect drilling well drilling bar according to claim 1 is characterized in that, the external diameter that said pin parts are provided with the front end of pin thread diminishes towards cover parts direction gradually.
3. a kind of double step screw buckle that is used to connect drilling well drilling bar according to claim 2 is characterized in that the internal diameter that said cover parts are provided with the part of negative thread becomes big gradually towards pin parts direction.
4. a kind of double step screw buckle that is used to connect drilling well drilling bar according to claim 3 is characterized in that the tapering of said pin thread and negative thread is 1: 10, and angle is 60 degree.
5. a kind of double step screw buckle that is used to connect drilling well drilling bar according to claim 4 is characterized in that, the initial tooth portion of said pin thread and negative thread is provided with big chamfering.
6. according to any described a kind of double step screw buckle that is used to connect drilling well drilling bar in the claim 1 to 5, it is characterized in that, be provided with stress relief grooves between said first step face and the second step face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204366146U CN202280432U (en) | 2011-11-08 | 2011-11-08 | Double-step threaded buckle used for connecting drilling well drilling rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204366146U CN202280432U (en) | 2011-11-08 | 2011-11-08 | Double-step threaded buckle used for connecting drilling well drilling rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202280432U true CN202280432U (en) | 2012-06-20 |
Family
ID=46226605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204366146U Withdrawn - After Issue CN202280432U (en) | 2011-11-08 | 2011-11-08 | Double-step threaded buckle used for connecting drilling well drilling rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202280432U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089165A (en) * | 2011-11-08 | 2013-05-08 | 南通永大管业股份有限公司 | Double-step threaded buckle for connecting drill rod for well drilling |
-
2011
- 2011-11-08 CN CN2011204366146U patent/CN202280432U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089165A (en) * | 2011-11-08 | 2013-05-08 | 南通永大管业股份有限公司 | Double-step threaded buckle for connecting drill rod for well drilling |
| CN103089165B (en) * | 2011-11-08 | 2016-11-09 | 南通永大管业股份有限公司 | A kind of double step screw buckle for connecting drilling well drilling bar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120620 Effective date of abandoning: 20161012 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |