CN206016711U - Oil casing threaded fast joint structure - Google Patents
Oil casing threaded fast joint structure Download PDFInfo
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- CN206016711U CN206016711U CN201621056946.0U CN201621056946U CN206016711U CN 206016711 U CN206016711 U CN 206016711U CN 201621056946 U CN201621056946 U CN 201621056946U CN 206016711 U CN206016711 U CN 206016711U
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- thread
- taper pipe
- oil casing
- joint structure
- casing threaded
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Abstract
The utility model discloses a kind of oil casing threaded fast joint structure, including body and box cupling, the internal diameter of box cupling is provided with female thread, the external diameter of body is provided with external screw thread, female thread is connected the connection for realizing body and box cupling with external screw thread, female thread and external screw thread are all taper pipe thread, and the crest face of taper pipe thread is all parallel with the axis of thread with tooth bottom surface；Taper pipe thread is buttress thread, a height of 2～3mm of the tooth of taper pipe thread；Spigot surface angle [alpha] is 30 °～45 °；Loading end angle beta is 0 °～3 °；Pitch is 3～4 teeth/inch；Taper is 1:7～1:12.Oil casing threaded fast joint structure of the present utility model, optimizes thread technology parameter, the automatic rectifying eccentricity phenomenon of energy, it is to avoid the generation of thread alternating phenomenon, make-up performance are good, and make-up speed is fast, reduces the button time, improves working performance；And joint bearing capacity is strong, fully meets the requirement of the oil casing threaded connection of big specification, meets the needs of Offshore Operation.
Description
Technical field
This utility model is related to tubing and casing technical field, and in particular to a kind of oil casing threaded fast joint structure.
Background technology
With domestic and international petroleum exploration and development striding forward to ocean, field operation condition there occurs larger change.Due to
The sea is rough, in floating state more than drillng operation device, causes conventional API screw threads make-up speed slow, and the twist-on time is long,
And easy thread alternating, particularly large-sized tubing and casing make-up, upper button be more difficult, has had a strong impact on the operation effect of lower tubing and casing
Rate, so that considerably increase the cost of Offshore Operation.
Content of the invention
In view of this, technical problem to be solved in the utility model is：A kind of oil casing threaded quick connection knot is provided
Structure, its make-up performance are good, are avoided that thread alternating phenomenon occurs, and make-up speed is fast, reduces the activity duration, improves working performance.
For solving above-mentioned technical problem, the technical solution of the utility model is：Oil casing threaded fast joint structure, bag
Include：Body and box cupling, the internal diameter of the box cupling are provided with female thread, and the external diameter of the body is provided with external screw thread, the interior spiral shell
Stricture of vagina is connected with the external screw thread, and the female thread and the external screw thread are all taper pipe thread, the crest face of the taper pipe thread and
Tooth bottom surface is all parallel with the axis of thread.As the crest face of taper pipe thread is all parallel with the axis of thread with tooth bottom surface, connect in connection
When hoop and body, internal and external threads screw energy rectifying eccentricity phenomenon automatically, it is to avoid the generation of thread alternating phenomenon, thus make-up performance is good,
Make-up speed is fast, reduces the activity duration, improves working performance.
In place of being below the multinomial Optimal improvements to oil casing threaded fast joint structure of the present utility model：
Wherein, a kind of structure of the box cupling is to be provided with the female thread in the whole length of the box cupling.The box cupling
Simple structure, it is easy to manufacture.
Wherein, another kind of structure of the box cupling is on the inwall of the box cupling to be provided with shoulder, and the female thread is located at
On the internal diameter of the box cupling of the shoulder both sides.Shoulder is provided with the inwall of box cupling, control position on the buckle can not only be played
Effect, and considerably increase the incompressible and resistant to bending ability of screw thread, improve anti-galling performance and the sealing of joint
Performance.
Wherein, the taper pipe thread be buttress thread, the transition between the spigot surface of the taper pipe thread and crest face
Arc radius R1 is more than the transition arc radius R2 between the loading end of the taper pipe thread and crest face.Two transition arc radius
This species diversity, be conducive to screwing for internal and external threads.
Wherein, preferred value is：The transition arc radius R1=0.76mm, the transition arc radius R2=0.3mm.
Wherein, a height of 2～3mm of the tooth of the taper pipe thread.Compared with conventional API screw threads, height of thread is increased, from
And the loaded area and bearing strength of single screw thread loading end is increased, it is improved the bonding strength of joint.
Wherein, the spigot surface angle [alpha] of the taper pipe thread is 30 °～45 °.Compared with conventional API screw threads, increase and lead
To face angle degree so that make-up is easier, and it is not easy thread alternating.
Wherein, the loading end angle beta of the taper pipe thread is 0 °～3 °.Compared with conventional API screw threads, carrying is reduced
Face angle degree, can not only prevent thread off, and make joint bearing capacity higher.
Wherein, the pitch of the taper pipe thread is 3～4 teeth/inch.Compared with conventional API screw threads, pitch is increased,
So as to increase the axial movement distance of joint twist-on individual pen, the twist-on number of turns is reduced, save the button time, improve operation
Efficiency.
Wherein, the taper of the taper pipe thread is 1:7～1:12.
To sum up, after employing above-mentioned technical proposal, oil casing threaded fast joint structure of the present utility model optimizes spiral shell
Stricture of vagina technical parameter, the automatic rectifying eccentricity phenomenon of energy, it is to avoid the generation of thread alternating phenomenon, make-up performance are good, and make-up speed is fast, reduces
The upper button time, improve working performance；And joint bearing capacity is strong, fully meets the requirement of the oil casing threaded connection of big specification,
Meet the needs of Offshore Operation.
Description of the drawings
Fig. 1 is the structure cross-sectional schematic of this utility model embodiment one；
Fig. 2 is the structure cross-sectional schematic of this utility model embodiment two；
Fig. 3 is the helicitic texture schematic diagram in this utility model embodiment；
In figure：1- bodys；11- external screw threads；2- box cuplings；21- female threads；22- shoulders；The L- axis of thread；A- spigot surfaces；B-
Crest face；C- loading ends；D- teeth bottom surface；α-spigot surface angle；β-loading end angle.
Specific embodiment
Nonrestrictive detailed description is done to embodiment of the present utility model below in conjunction with the accompanying drawings.
Embodiment one
As Fig. 1 and Fig. 3 jointly shown in, the oil casing threaded fast joint structure of embodiment one includes：Body 1 and box cupling 2,
Female thread 21 is provided with the internal diameter of box cupling 2, external screw thread 11 is provided with the external diameter of body 1, by female thread 21 and external screw thread
11 connections, realize that the connection of body 1 and box cupling 2, female thread 21 and external screw thread 11 are all taper pipe thread, wherein, taper pipe thread
Crest face B is all parallel with axis of thread L with tooth bottom surface D.Crest face B is all parallel with axis of thread L with tooth bottom surface D so that even
When box cupling 2 and body 1, when female thread 21 is screwed with external screw thread 11 can rectifying eccentricity phenomenon automatically, it is to avoid thread alternating phenomenon is sent out
Raw, make-up performance is good, and make-up speed is fast, can reduce the activity duration, improves working performance.
As shown in figure 1, wherein, box cupling 2 is provided with above-mentioned female thread 21 over the whole length.The box cupling simple structure, easily
In manufacture, it is suitable to sealing and the less demanding situation of bending resistance.
As shown in figure 3, wherein, the die mould of taper pipe thread in partially trapezoidal, is buttress thread, the spigot surface A of taper pipe thread
With the transition arc radius between loading end C and crest face B of the transition arc radius R1 between the B of crest face more than taper pipe thread
R2.This species diversity of two transition arc radius, is conducive to screwing for female thread 21 and external screw thread 11.Further, preferred value is：
Transition arc radius R1=0.76mm, transition arc radius R2=0.3mm.
Wherein, a height of 2～3mm of the tooth of taper pipe thread, preferred value is 2.15mm.Compared with conventional API screw threads, increase
Height of thread, so as to increase the loaded area and bearing strength of single screw thread loading end, is able to the bonding strength of joint
Improve.
As shown in figure 3, wherein, the spigot surface angle [alpha] of taper pipe thread is 30 °～45 °, and preferred value is 30 °.With routine
API screw threads are compared, and are increased spigot surface angle so that make-up is easier, and are not easy thread alternating.
As shown in figure 3, wherein, the loading end angle beta of taper pipe thread is 0 °～3 °, and preferred value is 0 °.With conventional API
Screw thread is compared, and reduces loading end angle, can not only be prevented thread off, and be made joint bearing capacity higher.
Wherein, the pitch of taper pipe thread is 3～4 teeth/inch, and preferred value is 3 teeth/inch.With conventional API screw thread phases
Than increasing pitch, so as to increase the axial movement distance of joint twist-on individual pen, reducing the twist-on number of turns, save button
Time, improve working performance.
Wherein, the taper of taper pipe thread is 1:7～1:12, preferred value is 1:7.5.
The oil casing threaded fast joint structure of embodiment one, because without shoulder structure, passing through position on the inwall of box cupling 2
Twist-on position with moment of torsion control box cupling 2.
Moment of torsion control：During twist-on box cupling 2, twist-on torque value must reach and corresponding require moment of torsion.
Position control：Mark, during twist-on box cupling 2, the end of box cupling 2 is made by factory at the big end of the external screw thread 11 of body 1
Face must be reached in the region of mark.
Embodiment two
As shown in Fig. 2 embodiment two is essentially identical with the structure of embodiment one, difference is：The oil of embodiment two
Casing threads fast joint structure, is provided with shoulder 22 on the inwall of box cupling 2, and female thread 21 is symmetrically set in connecing for 22 both sides of shoulder
On the internal diameter of hoop.After 90 ° or negative angle shoulder are set, can not only play a part of to control position on the buckle, and considerably increase
The incompressible and resistant to bending ability of screw thread, improves the anti-galling performance and sealing property of joint.The box cupling of the structure, it is right to be suitable to
Sealing and bending resistance have the situation of strict demand.
Claims (10)
1. oil casing threaded fast joint structure, including：Body and box cupling, the internal diameter of the box cupling are provided with female thread, described
The external diameter of body is provided with external screw thread, and the female thread is connected with the external screw thread, and the female thread and the external screw thread are all
Taper pipe thread, it is characterised in that the crest face of the taper pipe thread is all parallel with the axis of thread with tooth bottom surface.
2. oil casing threaded fast joint structure as claimed in claim 1, it is characterised in that in the whole length of the box cupling
It is provided with the female thread.
3. oil casing threaded fast joint structure as claimed in claim 1, it is characterised in that set on the inwall of the box cupling
There is shoulder, the female thread is on the internal diameter of the box cupling of the shoulder both sides.
4. the oil casing threaded fast joint structure as described in claim 1,2 or 3, it is characterised in that the taper pipe thread is
Buttress thread, the transition arc radius R1 between the spigot surface of the taper pipe thread and crest face is more than the taper pipe thread
Transition arc radius R2 between loading end and crest face.
5. oil casing threaded fast joint structure as claimed in claim 4, it is characterised in that the transition arc radius R1=
0.76mm, the transition arc radius R2=0.3mm.
6. oil casing threaded fast joint structure as claimed in claim 4, it is characterised in that the tooth of the taper pipe thread is a height of
2～3mm.
7. oil casing threaded fast joint structure as claimed in claim 4, it is characterised in that the spigot surface of the taper pipe thread
Angle [alpha] is 30 °～45 °.
8. oil casing threaded fast joint structure as claimed in claim 4, it is characterised in that the loading end of the taper pipe thread
Angle beta is 0 °～3 °.
9. oil casing threaded fast joint structure as claimed in claim 4, it is characterised in that the pitch of the taper pipe thread is
3～4 teeth/inch.
10. oil casing threaded fast joint structure as claimed in claim 4, it is characterised in that the taper of the taper pipe thread
For 1:7～1:12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621056946.0U CN206016711U (en) | 2016-09-14 | 2016-09-14 | Oil casing threaded fast joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621056946.0U CN206016711U (en) | 2016-09-14 | 2016-09-14 | Oil casing threaded fast joint structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206016711U true CN206016711U (en) | 2017-03-15 |
Family
ID=58260381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621056946.0U Active CN206016711U (en) | 2016-09-14 | 2016-09-14 | Oil casing threaded fast joint structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206016711U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288553A (en) * | 2017-07-24 | 2017-10-24 | 延安守山机械制造有限公司 | A kind of buttress thread |
| CN112283445A (en) * | 2020-10-26 | 2021-01-29 | 张学昌 | Quick connecting pipe hoop for pipeline construction and construction method thereof |
-
2016
- 2016-09-14 CN CN201621056946.0U patent/CN206016711U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288553A (en) * | 2017-07-24 | 2017-10-24 | 延安守山机械制造有限公司 | A kind of buttress thread |
| CN112283445A (en) * | 2020-10-26 | 2021-01-29 | 张学昌 | Quick connecting pipe hoop for pipeline construction and construction method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |